IEEE TRANSACTIONS ON EDUCATION, VOL. E-24, NO. 3, AUGUST 1981
design of multiphase processing units and in the development of contin-uous process technologies from batch data. His research activities in-dude fundamental and applied studies of gas-liquid systems and studiesof the economic structure of the chemical processing industry with em-phasis on applying microeconomics to process design.Dr. Russell is a member of the American Chemical Society, the Amer-
ican Institute of Chemical Engineers, and the American Society forEngineering Education. He is a Registered Professional Engineer in theState of Delaware.
Vikram L. Dalal (S'66-M'68) was born in Bombay, India, in 1944. Hereceived the B.S. degree in electrical engineering from the University ofBombay, Bombay, India, in 1964, and the Ph.D. degree in electrical
n engineering and the M.P.A. degree in appliedeconomics from Princeton University, Prince-ton, NJ, in 1969 and 1974, respectively.
_ He has extensive experience in semiconductorphysics and technology, solar energy conversion,and energy economics. He worked with RCALaboratories, Princeton, NJ, from 1969 to1974, at Princeton University in 1975, and atthe University of Delaware, Wilmington, since1976. In 1975 he served as a Consultant forthe Ford Foundation to do a study on energy
strategies for India. At present, he is Manager of the Device Design andAnalysis Group at the Institute of Energy Conversion of the Universityof Delaware and also leads the project on amorphous silicon solar cells.He is the author of 25 technical publications and five economic- andenvironment-related publications.
Renewable Energy Sources and Rural Developmentin Developing Countries
R. RAMAKUMAR, SENIOR MEMBER, IEEE, AND WILLIAM L. HUGHES, FELLOW, IEEE
Abstract-Economic and geopolitical constraints on global nonrenew-able energy supplies will force many nations, especially the developingcountries, to accelerate their use oflocal renewable energy sources. Thispaper discusses some of the technical, economic, and socioeconomicaspects of the application of renewable (solar) energy sources for ruraldevelopment in resource-poor population-rich developing countries.The possible role of educational institutions in the U.S. and in the de-veloping countries in assisting in the successful introduction of solartechnologies in rwal areas is outlined. A selected bibliography is in-cluded for the benefit of readers interested in additional informationon this important topic.
INTRODUCTIONTHE decade of the 1970's will go down in history as theTone that brought into focus the limited and geopolitical
nature of the nonrenewable energy resources of the world andthe need to start the process of transferring the dependence, atleast partly, onto renewable energy sources. Civilization hasgone through a transfer of energy sources once already-fromrenewable energy sources to fossil fuels-as a consequence ofthe industrial revolution. This transfer was associated withthe lowering of energy costs. However, the transfer that is inthe making is going to increase energy costs considerably. Theramifications of this latest change in economic and socioeco-nomic terms will be significant, global, and highly uneven.
Manuscript received November 7, 1980; revised December 29, 1980.This work was supported by the School of Electrical Engineering,Oklahoma State University.R. Ramakumar is with the Department of Electrical Engineering,
Oklahoma State University, Stillwater, OK 74078.W. L. Hughes is with the Engineering Energy Laboratory, Oklahoma
State University, Stillwater, OK 74078.
For the nearly one billion people living in scattered ruralareas of developing countries in the continents of Asia, Africa,and South America, the consequences of the massive changesin the global energy scene have been devastating. They findthemselves trapped in a cruel race between demography anddevelopment.Resolution of these global problems will be a very slow and
painful process. Initial efforts must be concentrated in ruralareas to improve the basic living environment and agriculturalproductivity, which, eventually will mitigate the exodus tourban slums-the most regreSsive of all the happenings in thedeveloping countries of the world. This initial effort willrequire a phenomenal increase in the (judicious) use of energyin the rural areas.Most of the developing countries are poor in conventional
fossil fuel resources and have to import them at the expenseof their meager foreign exchange reserves. As such, solutionsrequiring increased consumption of fossil fuels can only makethe situation worse. Introduction of nuclear technology on alarge scale around the world has many ramifications and raisesmany unanswered questions. This paper is concerned withthe third alternative-namely, the harnessing of renewable(solar) energy sources with the help ofsmall-scale decentralizedenergy systems in rural areas.During the last 5 years, there has been a dramatic increase in
interest in the utilization of renewable energy sources in thenon-OPEC developing countries of the world. However, theabsence (with some notable exceptions) of large and effectiveinfrastructures dedicated to generating technological changeshas posed a temporary barrier to the introduction of energyin rural areas. It is felt that educational institutions in the
0018-9359/81/0800-0242$00.75 0 1981 IEEE
242
RAMAKUMAR AND HUGHES: ENERGY SOURCES AND RURAL DEVELOPMENT
developing countries, cooperating with their counterparts inthe United States, can provide a nucleus for such an infrastruc-ture to develop.This paper presents an overview of the solar technologies of
interest for use in developing countries and discusses ruralenergy needs and renewable technology options available tomeet the requirements. Integrated system concepts and theiradvantages are discussed along with the economic and socio-economic implications of introducing renewable energy sys-tems in rural areas. The possibility of collaborative effortsbetween educational institutions in the U.S. and in the de-veloping countries to actively involve themselves in thesuccessful introduction of solar technologies in the ruralareas for the benefit of humanity is outlined.
OVERVIEW OF TECHNOLOGIES
A wide spectrum of technologies is available for harnessingrenewable energy sources. In addition to human muscle powerand geothermal energy, the renewable resources available forutilization are solar radiation, solar heat, wind energy, fallingwater, and biomass (including human, animal, and agriculturalwastes). It appears that each resource is best suited for certainapplications and the technological challenge lies in matchingthe resources to the needs in a most appropriate manner.An entire family of contraptions have been developed for
utilizing human muscle power for transportation (bicycles,tricycles, railbikes), agricultural activities (water pumping,plowing, shelling, milling, threshing, harrowing), and domesticactivities (energy cycles attached to wheel grinders, woodcarver, drills, battery charger, etc.). All these devices use somekind of a pedal arrangement and moderate pedaling rates(60-80 r/min) yield about 60-70 W of power. Geothermalenergy is highly localized, though widely distributed over theworld. Because this resource is extremely site specific and be-cause of the risks involved in its development at the rurallevel, it will not be discussed further. The primary focus ofthis paper will be on the utilization of different manifestationsof solar energy in the rural setting. Some of the technologiesavailable for harnessing this resource are listed below.
1) Solar radiationa) Photovoltaic-powered water pumping systems for
domestic use and for microirrigation systemsb) Direct generation of electricity using photovoltaic
arrays for storage and later use2) Solar heat
a) Flat-plate collectors for supplying hot water for hos-pitals, schools, etc.
b) Linear and point-focusing collectors with suitableenergy conversion devices to generate electrical, me-chanical, and/or thermal energy
c) Solar stills for potable waterd) Solar crop driers and other agricultural applicationse) Solar ponds for energy storage and reconversionf) Space heating and cooling systemsg) Sun/earth tempered buildings
3) Wind energya) Wind-driven water pumps withmechanical or electrical
transmission
b) Wind-electric conversion systems for generation ofelectricity
4) Falling watera) Microhydro systems (1 kW to 1 MW) for generation
of electricityb) Water wheels for mechanical shaft powerc) Hydraulic ram for pumping waterd) Isothermal hydraulic air compression and the sub-
sequent use of the compressed air for a variety ofapplications
5) Biomassa) Anaerobic fermentation of human, animal, and agri-
cultural wastes to obtain biogas for use in several waysb) Fermentation of biomass to produce alcoholsc) Pyrolysis or aqueous pyrolysis of biomass to produce
liquid and/or gaseous fuelsd) Direct use of biomass such as wood for production of
thermal and other forms of energye) Unique approaches to biomass utilization such as aqua-
culture waste water treatment and energy farms.
RURAL ENERGY NEEDS AND TECHNOLOGY OPTIONS
The energy needs of small rural communities fall into threecategories:
1) energy to improve the basic living environment;2) energy to improve agricultural productivity; and3) energy to establish and sustain small-scale industries.While both renewable and nonrenewable energy sources can
be used to satisfy these needs, the focus in this paper is on re-newable energy sources. In Table I, a comprehensive listingof the various needs and the renewable energy technologyoptions are given under the three categories listed above.Another way to look at rural energy needs is to group them
into a) productive applications and b) nonproductive applica-tions. Any energy use that does not directly contribute toincreasing agricultural or industrial productivity is consideredunder b). Thus, categories 2) and 3) fall under a). Prioritizingthese needs is a very delicate task and is highly sensitive to thecountry and the region involved. The authors believe that, ingeneral, top priority should be given to 1) if the human misery,drudgery, and ensuing sense of hopelessness that exist in re-mote rural areas are to be reversed soon.Estimates of the amount of energy required for various appli-
cations vary widely. At the very least, about 1 kWh of usefulenergy per person per day will be sufficient to satisfy the basicenergy needs to improve the living environment. Some esti-mates have put the total (thermal equivalent) figure as high as6-7 kWht per person per day, depending on the assumptionsmade regarding the efficiency of use. The other energy needsare so extremely site specific and activity specific that theywill not be discussed any further. Many excellent estimates ofthe energy needs for specific applications such as irrigation areavailable.
INTEGRATED SYSTEM CONCEPTS
Two approaches have been suggested for the utilization ofseveral manifestations of solar energy in tandem. In the firstapproach, all the resources are converted into one form (usually
243
TABLE
IRU
RALEN
ERGY
NEED
SAN
DRENEWABLEEN
ERGY
TECHNOLOGY
OPTIONS
Energy
toimprove
the
basic
living
envi
ronm
ent
Category
Need
s/Ta
sks
Opti
ons
Rema
rks
Ener
gyto
improve
agri
cult
ural
prod
ucti
vity
(contd)
Category
Need
s/Ta
sks
Opti
ons
Remarks
Cooking
Supp
lyof
biog
asSolar
cookers
Firewood/Dung/Agricultural
Resi
due
Vege
tabl
eoi
lElectricity
from
the
Village
Ener
gyCenter
(VEC);
Biogas-IC
Engine-Generator
Anim
alfa
t
Dome
stic
&potable
Wind
-dri
ven
mech
anic
alwa
ter
pumps
wate
rsupply
Inte
grat
edwind-driven
perm
anen
tma
gnet
generator
(PMG)-Motor-Pump
combination
Dome
stic
Environment
Inte
grat
edphotovoltaic-motor-pump
sets
Biog
asfu
eled
engi
ne-p
ump
sets
Hydr
auli
cram
Elec
tric
motor-pump
sets
Ligh
ting
Elec
tric
ity
from
the
VEC
Biogas
lamp
s
Cold
storage
ofElectricity
from
the
VEC
Peri
shab
les
Solar
refr
iger
atio
nunit
Stre
etli
ghti
ngEl
ectr
icit
yfr
omth
eVE
CBiogas
lamps
Educ
atio
nal
Elec
tric
ity
from
the
VEC
devi
ces
Emer
genc
yand
Elec
tric
ity
from
the
VEC;
supplied
from
the
communications
storage
batt
erie
sequipment
Community
Water
sani
tati
onEl
ectr
icit
yor
grav
ity
&chemicals
Envi
ronm
ent
Conn
unit
yco
ldEl
ectr
icit
yfr
omth
eVE
Cstorage
Solar
refr
iger
atio
nun
it
Hotwater
for
Sola
rfl
at-p
late
hot
water
heaters
scho
ols
and
dispensaries
Spac
eheating
and/
Sola
rspace
heating
and
cooling
systems
orcooling
for
community
bldg
s.
Most
appropriate
Diff
icul
tto
adapt
tolo
cal
cult
ure
Envi
ronm
enta
lly
recessive
Needed
for
huma
nintake
&other
uses
Wasteful
ofenergy
Neither
suit
able
nor
avai
labl
ein
sufficient
quan
titi
es
Econ
omic
;ne
edgood
wind
regime
Conv
enie
nt;
water
sour
ceand
windmill
need
not
beat
the
same
loca
tion
Low
main
tena
nce;
conv
enie
nt;
expe
nsiv
eat
present
Not
readily
avai
labl
e;ca
nbe
deve
loped
Need
low
head
tostart
with;
comm-
erci
ally
avai
labl
eat
present
Convenient;
need
electric
supply
Convenient;
high
ener
gyef
fici
ency
poss
ible
with
fluorescent
lamps
May
not
beve
ryconvenient
Expe
nsiv
e;very
low
prio
rity
inpoor
hous
ehol
dsDo
esnot
appear
viab
lefor
sing
lefa
mily
households
Convenient
Not
very
convenient
Located
ina
suit
able
hall
inthe
VEC
Loca
ted
ina
suitable
room
inthe
VEC;
reliability
important
Located
near
the
water
storage
and
pump
ing
stat
ion
Loca
ted
inthe
energy
center
and
managed
byan
attendent
Can
belo
cate
din
orne
arth
eVE
C;expensive
atpresent
Viab
leat
present
Though
available
atpresent,
they
are
very
expe
nsiv
eand
may
not
besu
itab
lefo
rru
ral
use
atpr
esen
t
Energy
toim
prov
eagricultural
prod
ucti
vity
Irrigation
water
Wind-driven
mechanical
water
pumps
Economic;
need
good
wind
regime
supply
Inte
grat
edwi
nd-d
rive
nPM
G-Mo
tor-
Pump
sConvenient;
wind
mill
can
belocated
away
from
the
wate
rsource
Pre-harvest
Inte
grat
edphotovoltaic-motor-pump
sets
Low
main
tena
nce;
expe
nsiv
eActivities
Biogas
fuel
eden
gine
-pum
pse
tsCa
nbe
developed
easi
lyin
suit
able
size
sHydraulic
ram
Need
low
head
flowing
water;
comm
erci
ally
available
Electric
motor-pump
sets
Conv
enie
nt;
need
elec
tric
supp
ly
Harv
esti
ng
Post
-har
vest
Acti
vities
Land
preparation
Small
tractors
and
gadgets
run
byli
quid
and
Need
development
and
fabrication
gaseous
fuels
obtained
from
biom
ass
Fertilizer
Slud
gematerial
obta
ined
from
biog
aspl
ants
Viable
atpresent
Using
wind
energy,
air
and
water
tosynthesi-
Syst
emmu
stbe
large
tobe
econ
omic
;ze
nitrogenous
fertilizers
need
prototype
deve
lopm
ent;
good
wind
regime
need
ed
Mechanical
powe
rSmall
harv
esti
ngmachinery
running
onliquid
Need
further
deve
lopm
ent
and
gase
ous
fuel
sobtained
from
biomass
Motive
power
for
Small
vehicles
running
onli
quid
and
gaseous
Need
furt
her
deve
lopm
ent
tran
spor
tfu
els
obta
ined
from
biom
ass
Proc
essi
ngth
eSmall
gadg
ets
running
onelectricity
from
the
Need
furt
her
development
harv
est
VEC
oron
liquid
and
gaseous
fuels
obta
ined
from
biomrass
Grai
ndrying
and
Sola
rgrain
drie
rsor
drie
rscu
mstorage
Viable
atpresent
stor
age
units
Cold
storage
ofElectricity
from
the
VEC
May
not
stand
long
supp
lyperi
shab
les
inte
rrup
tion
sSo
lar
refrigeration
unit
Can
use
the
heat
reje
cted
bya
4-V-i
4-se^
--I-4ho-zr-l.l1
conc
e
Energy
toestablish
and
sustain
small-scale
industries
Low
grade
Flat-plate
coll
ecto
rsViabl
(les
sth
an15
0°C)
Ther
mal
Medi
umgr
ade
Line-focusing
parabolic
collectors
Viabl
Ener
gy(150°C
to30
0°C)
High
grad
ePoint
focusing
dish
collectors
Viabl
kabo
ve300°C)
Wind
mill
-mec
hani
cal
friction
devi
cewith
Cumbe
suitable
ther
mal
energy
storage
nance
regi
mGe
nera
lWind-Electric
Conv
ersi
onSy
stem
(WEC
S)du
mp-
Low
min
genergy
into
anel
ectr
icresistance
heat
erre
gim
with
suitable
thermal
ener
gyst
orag
e
entr
atin
gsolar
thermal
pIant
leat
pres
ent
le,
depe
ndin
gon
the
use
le,
depending
onth
eus
e
ersome;
cons
ider
able
main
te-
ere
quir
ed;
need
good
wind
ate
main
tena
nce;
need
good
wind
ie
Burn
ing
biogas
Wasteful;
better
uses
exist
Burn
ing
biom
ass/
agri
cult
ural
resi
due
Envi
ronm
enta
lly
rece
ssiv
e
Windmill
Inte
rmit
tant
;ne
edgood
wind
regime
Waterwheel
Need
storage
rese
rvoi
ror
cont
inu-
ous
wate
rfl
ow;
very
site
spec
ific
Solar-thermal
plant
Need
conc
entr
ator
sto
improve
the
over
all
effi
cien
cyto
dece
ntva
lues
.Closed
cycles
may
beex
pens
ive
Mech
anic
alRo
tati
ngshaft
Phot
ovol
taic
-ele
ctri
cmotor
comb
inat
ion
Expe
nsiv
e;problem
ofcl
oud
cover
Ener
gyan
dne
edfo
relectric
energy
stor
age
Biogas
fueled
engi
neBiogas
availability
above
and
beyond
the
domestic
needs
Electric
motor
Need
togenerate
elec
tric
alen
ergy
byon
eor
more
ofth
ema
nymeans
available;
expe
nse
invo
lved
inth
est
orag
eof
electrical
ener
gy(i
fne
eded
)
tTl bTi zEn CQ, n zC', 0 zEnI 0 z oC~ 04 0 UtT t3
it
RAMAKUMAR AND HUGHES: ENERGY SOURCES AND RURAL DEVELOPMENT
SOLARI IRRIGATION I
C E LL WATER -
1MC RO
jr |STATION ,
-1'.-'...'.'.'
A WATER H WINO
,..............................
..:.:.:..........
Fig. 1. Schematic of a rural energy ce:
electrical) for storage (usually in batteries) and distribution toconsumers. The second approach advocates the integrationof benefits at the user's end. For example, while a windmillmay be pumping water for storage in an overhead reservoir,solar cells may be charging the batteries used to power educa-tional and communications equipment, and a biogas unitcould be supplying energy for cooking. The objective is tosupply the basic needs of the rural poor in the most economicand appropriate manner. In other words, the available re-sources and the energy conversion devices should be matchedto the basic needs to achieve an improvement in the livingenvironment in rural areas.
Fig. 1 illustrates one possible combination of devices and theirinterconnection suitable for an integrated rural energy center.Wind-driven water pumps and solar cell-driven water pumpingstations pump water for storage in an overhead tank. A smallhydroelectric (microhydro) unit can be used as needed to con-vert the potential energy of the stored water into electricalform and the water recirculated as in the case of pumped hydrostations. When necessary, irrigation water can be supplieddirectly as shown in Fig. 1. Domestic and potable water supplyfor the village is drawn from the overhead water storage asillustrated. A community biogas facility with sufficient gasstorage constitutes an important component of the energycenter. Biogas can be directly supplied from this facility forcooking and other needs of the villagers. The biogas can alsobe used in an internal combustion engine driving an electrical
nter to harness renewable energy sources.
generator for providing electricity. This electrical supply isassisted by the microhydro unit and wind-electric conversionsystems as shown. Storage of electrical energy in batteries isprovided only to operate the emergency and communicationsand educational equipment. The bulk of the energy storage,however, is in the form ofbiogas storage and as potential energyof water stored in the overhead tank. In the future, additionaldevices can be incorporated as the occasion warrants (shown indotted lines in Fig. 1).Remote clusters of three to four villages are common in de-
veloping countries. Often, such clusters are not electrified be-cause of the low load factors presented by such loads and alsobecause of the expense involved in constructing long distri-bution lines from existing utility grids. Such clusters can beenergized by establishing an energy center of the type describedin the previous paragraph in one of the villages and by install-ing a distribution line connecting all the villages as shown inFig. 2. Depending on the local conditions, availability, andterrain, windmill farms, microhydro units aided by solar and/or wind energy, photovoltaic devices, and other possible energyconversion units (for example, devices suitable for utilizinglocally available agricultural waste and other biomass) can beadded in time as illustrated.
ECONOMIC ASPECTSApplication of conventional cost-benefit analyses to the
utilization of renewable energy sources in the rural areas of
245
IEEE TRANSACTIONS ON EDUCATION, VOL. E-24, NO. 3, AUGUST 1981
However, in evaluating the various options for supplyingenergy for remote and rural applications in developing coun-
tries, the cost of energy obtained from renewable energysources is often compared with the cost of generation usingsmall diesel-electric units (also known in the literature as auto-generation). The cost of energy obtained from diesel units can
be expressed as
[ r(1 +r)n ] p[(+r)n 1 187.6k (2)
where D is the diesel consumption in liters per kilowatt hourand F is the diesel cost in U.S. cents per liter.
In Fig. 5, (2) is plotted against the diesel cost for variousvalues of capital cost and for an assumed set of economicparameters (given in the box in Fig. 5).As discussed earlier, practical systems for harnessing renew-
able energy sources will employ several devices to convert themultiple inputs into useful forms. For such systems, theaverage generation cost is given by
WINDMILL
FARM
Fig. 2. Scheme to energize a small cluster of villages.r(1 +r)n i + mi PiRi
Cav =
developing countries will lead one to the obvious conclusionthat any such energy program for rural development is not"'profitable." Unfortunately, this method of computing"profits" does not consider the cost of not making an effortto improve the lot of the rural poor. Continued neglect andthe consequent widening of the living standards will eventuallymanifest itself in a most unpleasant manner when the appro-
priate opportunity arises. The rest of this section should beconsidered with these points in mind.The cost of energy generated by any energy system that does
not require fuel is solely due to the amortization of the capitaland operation and maintenance, if taxes and insurance chargesare neglected. This cost can be expressed as
r(I +r)n pC l+[r) (1)
in whichC = generation cost in U.S. cents per kilowatt hour.k = annual average energy production factor (also known
as plant or load factor).annual kilowatt hour energy output of the system
8760 (kilowatt rating of the system)m = fraction of the capital cost needed per year for opera-
tion and maintenance of the unit.n = amortization period in years.P = capital cost in U.S. dollars per kilowatt.r = annual interest rate in per unit (equal to 0.01 times the
annual percentage rate).Equation (1) is plotted in Figs. 3 and 4 for plant factors
ranging from 0.1 to 1.0. These charts can be used to obtaina quick estimate of the generation cost for nonfuel-burningenergy systems. For example, if a wind-electric system costs$1 500/kW and is located in a site yielding a plant factor of0.3, then the generation cost (for an annual interest rate of 10percent) can be read from Fig. 3 as 9.5 cents per kWh.
(3)(87.6) E (Riki)
i
whereCav = average generation cost in U.S. cents per kilowatt hour.
i = summation index to include all devices.ki = load factor for the ith device.mi = operation and maintenance charge rate in per unit for
the ith device.ni = amortization period in years for the ith device.Pi = capital cost in U.S. dollars per kilowatt for the ith
device.Ri = rating in kilowatts of the ith device.
Considerable simplification results if the amortization periodand the operation and maintenance charge rate can be taken as
the same for all devices. Then
cay TcrI
87.6 Req
where
I = total investment in U.S. dollars
= ZPiRi,
Req = equivalent continuous rating in kilowatts
= Riki,
and
Tcr = total charge rate
r(1 + r)n(1 +r) - 1
(4)
(5)
(6)
(7)
SYNTHETICFUELSFROM
\ BIOMASS /
lI
246
RAMAKUMAR AND HUGHES: ENERGY SOURCES AND RURAL DEVELOPMENT
i UU2"'AN I) "I
I
FACTOR 0.1 / /I
nO 7/ /0 75213 5 30
$ PER INSTALLED KW~~~~~~~~~~~~~~~~~~~~~L
0.15 SkSO.4.
20- -I'/ 3 7 50)0 -15 20 ~
J III,/,~~~~~~~ - ~z
10 2505500 75051000
o 2500 io500 2000oo
750 1500 22150 3000 I00 2d00 3000 4000
$ PER INSTALLED KW
Fig. 3. Generation costs for nonfuel-burning energy systems;0.1 < 04
EE-J-w
3w
:jU)
0
z0
wzw
DIESEL COST U.S. ¢/LITER
Fig. 5. Generation costs for small diesel-electric conversion systems.
I
z
(-C
z(i,
z
Lb
0
z
0
$ PER INSTALLED KW
Fig. 4. Generation costs for nonfuel-burning energy systems;0.4 S k < 1.0.
If such an assumption is not valid, then a conservative (mean-ing highest) estimate for the generation cost can be obtainedby using the smallest ni for n and the largest mi for m in (7)and the resulting value of Tcr in (4). The average generationcost is plotted in Fig. 6 as a function of (IIReq) for differentvalues of n with a 10 percent (r = 0.1) annual interest rate andan operation and maintenance charge of 5 percent (m = 0.05)of capital per year.
AMORTIZATIONPERIOD, YEARS 5
25X
20 2
z
0
C15 20
z
w
0 2000 4000 6000 8000 10000
CAPITAL INVESTMENT IN U.S.$ PER
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systems.
As an example of the use of these charts, let the diesel costbe U.S. 30 cents per 1. Assuming the diesel unit to cost as
low as U.S. $200 per kW, the generation cost can be obtainedfrom Fig. 5 as 15.5 U.S. cents per kWh. With a 20 year amor-
tization period, from Fig. 6, an average generation cost of 15.5
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IEEE TRANSACTIONS ON EDUCATION, VOL. E-24, NO. 3, AUGUST 1981
U.S. cents per kWh corresponds to a capital investment of U.S.$8000 per equivalent continuous kW for the renewable energysystem. Even higher costs will be acceptable as fuel prices goup due either to the basic oil price increase or to the high costof delivery to the remote areas.Energy systems for harnessing renewable resources, though
they appear to be very expensive in terms of dollars per kilo-watt, can be competitive in remote rural areas. This is espe-cially true in resource-poor population-rich countries whichhave to import fuel at the expense of their meager foreignexchange reserves. When one includes the hidden cost of in-action discussed earlier, the attractiveness of decentralizedintegrated renewable energy systems becomes very obvious.
SOCIOECONOMIC ASPECTSThe concepts of "development" and "quality of life" are
very closely tied to the socioeconomic setting of the individualconcerned. This is especially true with a rural populace withcenturies-old traditions and customs and this puts an extraburden on those advocating the introduction of renewableenergy sources and energy systems in the rural areas of develop-ing countries.What course of action should a villager in a developing coun-
try follow to get him or her out of the perpetual penury thathe or she is in? To put it simply, the answer is not clear cut.Often the person is advised by outside experts to follow a pathtowards modernization in which the benefits seem low and thecosts appear to be high. Many demonstration programs havebeen set up in villages around the world that, while providinginteresting news stories, do not have any chance at all of beingreplicated over many additional villages for purely economicreasons. They in fact do a disservice in that they provide asource of rising expectations with no possibility of subsequentfulfillment. This dilemma is always faced by those personsattempting to improve the energy situation in remote ruralareas of developing countries.Unfortunately, conventional fuels are rapidly becoming out
of reach for non-OPEC developing countries simply becauseof price or the availability of foreign exchange or both. There-fore, if the villager is to have energy at all, it must be of avariety that is locally available-renewable energy sources. Itis generally not realistic to expect that complete energy sys-tems be manufacturable in the developing countries, but somecomponents may be. It is very important in energy planningin any developing country to determine what can be done athome and what is not practical to do at home. It is at thispoint that the participation of local educational institutionsbecomes vital. Moreover, any energy technology anywhere hascontinual operating problems and requires some constant atten-tion. Local educational institutions can do an excellent job oftaking care of the energy systems in their region and in train-ing personnel to perform such jobs. Often, pilot programs arenot needed to demonstrate that a particular technology works.Rather, pilot programs are needed to identify the day-to-dayoperating problems of complete energy systems, to understandthe interface problems that may exist between devices andbetween local customs and system operating requirements, andto gather meaningful solutions to these problems. Once again,
the importance of the participation of local educational in-stitutions is evident.Any attempt that will not improve the villager's basic living
environment but will help only the already rich will not in-still hope in the minds of the rural poor. Therefore, providingenergy to improve the basic living environment of those whoneed it the most should have high priority. This must befollowed by the use of energy to improve agricultural produc-tivity and, eventually to the buildup of rural agro-industrialstructures. At this point, economic multiplier effects areexpected to come into action, resulting in tangible long-term benefits for everybody in the rural areas and for thenation as a whole.
ROLE OF EDUCATIONAL INSTITUTIONSThe success of systems introduced to harness renewable
energy sources in the rural areas of developing countries willprimarily depend on two basic factors.
1) Development and availability of appropriate technologies,hardware, and design methodologies to match the resources tothe needs.2) Buildup of educational services and the associated infra-
structure necessary to properly maintain and utilize the systemsthat are already installed.
In both of these areas, educational institutions (both in theU.S. and in the developing countries) can play a key role.Educational institutions in the U.S. can collaborate with their
counterparts in the developing countries and assist them in theestablishment of research centers with library, laboratory, andtesting facilities where technological innovations can germinateand grow. They can also establish international training cen-ters in the U.S. (such as the ones in the University of Florida,Gainesville, and in the State University of New York, StonyBrook) to bring scientists and engineers from various devel-oping countries for short periods of time for intensive work-shops and training. The ensuing multiplier effect in their owncountries should lead to the buildup of an indigenous cadre ofwell qualified and trained people to shoulder responsibilitiesin this area. It is important that at least a few of these U.S.centers have a representative collection of operating hardware,probably working together as an (well-instrumented) inte-grated renewable energy system. From the participants' pointof view, hands-on experience with such systems could be mostvaluable. It appears that the model of agricultural extensionprograms which have been so successful in many parts of theworld can easily be adapted to serve the needs in the renewableenergy area. In summary, educational institutions in the U.S.can best serve in the "catalyst" role to initiate and sustain re-search centers and research and implementation programs inthe developing countries.The role of educational institutions in the developing coun-
tries is far more important and even crucial. One of theirprimary responsibilities is to develop student interest at anearly stage (probably in the junior or senior level) in the re-newable energy area by involving them in the exploratory,assessment, design, implementation, and operating stages ofongoing projects. Graduate students working towards mastersand doctoral degrees should be encouraged to delve into some
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of the problems related to the renewable energy resourcesdevelopment and utilization. There is no dearth of highlychallenging theoretical and experimental problems in this area,the solutions of which require the most sophisticated modeling,optimization, and design techniques. Periodic short coursesand workshops should be offered on various aspects of renew-able energy sources aimed at motivating scientists, practicingengineers, industrialists, and entrepreneurs and some of theprograms may even be designed for educating the general publicon the beneficial impacts of the utilization ofrenewable energyresources. The technical schools (such as polytechnics offeringdiploma programs in contrast to regular engineering collegesand universities offering degree programs) can also play animportant role by training technicians in the ways and meansof maintaining and repairing the hardware used in the systemsdesigned to harness renewable energy sources.
SUMMARY OF WORK AT THEOKLAHOMA STATE UNIVERSITY
ENGINEERING ENERGY LABORATORY(OSU/EEL)
For over two decades, engineers and scientists at the Okla-homa State University have been actively involved in seekingmethods for utilizing available fossil fuels more efficientlyand for transferring the world's energy dependence, at leastpartly, onto renewable energy resources. The team of re-searchers include faculty and students from several disciplinesboth in and out of the Division of Engineering, Technology,and Architecture (DETA). To coordinate many of theseactivities, an Engineering Energy Laboratory was constitutedin 1973 as a part of OSU's DETA.
In the School of Electrical Engineering, the broadly basedinterdisciplinary research program (dating back to 1960) isprimarily aimed at developing continuous and intermittentduty energy systems to harness renewable energy sources andto apply them appropriately to provide a proper energy mix tosatisfy the global energy needs in the coming decades. Initially,the work was sponsored by the area utility companies. In therecent past, components of this research effort have attractedfunding from agencies such as the National Science Founda-tion, the U.S. Department of Energy, the United NationsEnvironment Program, the National Academy of Sciences, andthe U.S. Agency for International Development.Over the years, the effort in the School of Electrical Engi-
neering has included work in high-pressure moderate-tempera-ture electrolysis and fuel cell design and development, hydro-gen energy storage systems, rechargeable hydrogen oxygenfuel cell development, computer simulation and optimizationof conventional and unconventional energy systems, hydrogen-burning internal combustion engine development, basic researchon the nature of the ionization processes in the hydrogenatom, statistical analysis of the energy in the wind and in thesun in Oklahoma, prototype wind-electric conversion systemdevelopment, variable-speed constant-frequency field modu-lated generator system development and its application inwind and solar-thermal-electric systems, studies on Egyptianenergy resources and the development of the wind powerpotential in Egypt, synthesis of hydrocarbons from biomass
via aqueous pyrolysis, and the development and applicationof renewable energy sources and systems for rural develop-ment in developing countries. Space does not permit evenbrief descriptions of all these projects. However, the onesthat directly relate to the topic of this paper are summarizedin the following paragraphs.Under the sponsorship of the United Nations Environment
Program, faculty and students have been involved in the de-sign and establishment of a rural energy center in the village ofPattiyapola in Sri Lanka to harness renewable energy sourcesfor rural development. This center became operational recently(1980) and useful data is being gathered by the Ceylon Elec-tricity Board, which has the responsibility for day-to-dayoperation and maintenance.The National Academy of Sciences recognized the serious-
ness of the energy problems faced by the developing countriesand commissioned an ad hoc panel to study the issues involvedand the possibility of utilizing renewable energy resources toalleviate it. The panel was chaired by the Director of theOSU/EEL. It released its findings in 1976 in the form of abook report entitled "Energy for rural development-Renew-able resources and alternative technologies for developingcountries." Since the publication of this report, some signif-icant changes have occurred in the global energy picture. Inaddition, there have been some worthwhile developments inrenewable energy resource research. These developments,though not spectacular, point to slow but steady progresstowards decreasing the cost of some of the technologies.This, coupled with the rapidly escalating cost of conventionalresources, has made it desirable to prepare a supplement tothe original report, which is expected to be published in theearly spring of 1981. Many of the ideas expressed in this paperare based on these and other publications. A representativelist of important publications in this area is presented inthe Bibliography.
In addition to the activities mentioned above, several facultymembers affiliated with the OSU/EEL have traveled extensivelyin Africa, Asia, Latin America, and the Far East as energyadvisors to U.S. Agency for International Development mis-sions. They are also actively involved in establishing linkagesfor potential cooperative research projects in the applicationof renewable energy sources for rural development in theThird World.
CONCLUDING REMARKSRenewable energy systems can provide a viable way to
energize rural areas of developing countries and to build uprural economic units that are vital to the stability and well-being of developing nations and, in a way, of the entireworld. Since almost all the renewable energy sources aredilute in nature, low-grade energy should be effectively usedwhenever possible. Appropriate ways must be found to con-vert low-grade energy to high-grade (electricity, liquid, andgaseous fuels) energy forms by means of synthesis and/orenergy conversion processes. If effectively used, the cumula-tive impact of even small amounts of intermittently availableenergy in rural areas can be considerable.
Utilization of several manifestations of solar energy in tan-
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dem with the integration of benefits at the user's end appearsto be the most appropriate way to proceed. This can beaccomplished by establishing a village energy center and bymaking it a point of focus for educational, cultural, and otheractivities.Although renewable energy systems are highly capital inten-
sive, as fuel prices continue to rise and their availability be-comes more tenuous, the economics of such systems appearsto be headed for a favorable status in the years to come.Local support and involvement are absolutely essential for
the success of projects such as the one discussed here. In theareas of training of personnel, maintenance of hardware, anddata collection and research, local educational institutions canplay a vital role. Cooperation with U.S. educational institu-tions can act as a catalyst and accelerate this process. Theneed is there and the urgency cannot be overemphasized. Itis up to the technical communities on both sides to accept thechallenge and act.
ACKNOWLEDGMENT
The authors wish to acknowledge the encouragement pro-vided by the Oklahoma State University School of ElectricalEngineering during the preparation of this paper.
BIBLIOGRAPHY
[1] J. C. Kapur, "Socio-economic considerations in the utilization ofsolar energy in underdeveloped areas," in Proc. United NationsConf New Sources of Energy, Rome, Italy, 1961, pp. 5 8-66.
[2] "Generation and utilization of power for rural communities indeveloping countries," General Electric Co., Mass. Inst. Technol.,Cambridge, MA, Stanford Res. Inst., Stanford, CA, and CARE,Inc., Summary Rep., 1963, submitted to R.E.P.A.S., Agency forInt. Development, U.S. Dep. of State.
[3] G. T. Ward, "Energy as a major factor in man's development,"Brace Res. Inst., McGill Univ., Montreal, P.Q., Canada, Tech.Rep. T 11, 1964.
[4] H. Z. Tabor, "Power for remote areas," Int. Sci. Technol., pp.52-57, 1967.
[5] K. A. McCollom, "Use of small-scale power systems in developingcountries," presented at the Conf. Engineering in InternationalDevelopment, Estes Park, CO, 1967.
[6] W. L Cisler, "Energy for economic progress," presented at theConf. Engineering in International Development, Estes Park, CO,1967.
[71 R. Ramakumar et al., "A wind energy storage and conversion sys-tem for use in underdeveloped countries," in Proc. 4th Intersoc.Energy Conversion Engineering Conf (IECEC), Washington, DC,1969, pp. 606-613.
[8] M. F. Merriam, "Is there a place for the windmill in the less de-veloped countries?," East-West Technol. Development Inst.,Honolulu, HI, Working Paper, Ser. 20, 1972; also "Windmills forless developed countries," Technos, vol. 1, no. 2, pp. 9-23, 1972.
[9] J. M. King and S. H. Folstad, "Electricity for developing areas viafuel cell power plants," in Proc. 8th Intersoc. Energy ConversionEngineering Conference (IECEC), Philadelphia, PA, 1973, pp. 1 11-115.
[101 E. F. Schumacher, Small is Beautiful-Economics as ifPeopleMattered. New York: Harper & Row, 1973, pp. 154-208.
[11] C. R. Prasad et al., "Bio-gas plants: Prospects, problems and tasks,"Economic and Political Weekly, India (Special Number), vol. 9,nos. 32-34, pp. 1347-1364, 1974.
[12] R. Ramakumar, "Harnessing wind power in developing countries,"in Rec. 10th Intersoc. Energy Conversion Engineering Confer-ence (IECEC), Newark, DE, 1975, pp. 966 - 973.
[131 United Nations Environment Program, "Review of the impact ofproduction and use of energy on the environment and the role ofUNEP," Rep. 75-40793, UNEP/GC/III/6/Rev. 1, 1975.
[ 14] C. Weiss and S. Pak, "Developing country applications of photo-voltaic cells," presented at the ERDA Nat. Solar PhotovoltaicProgram Review Meeting, Washington, DC, 1976.
[15] United Nations Economic and Social Council, Expert WorkingGroup on the Use of Solar and Wind Energy, Rep. E/ESCAP/NR/3/L.2, 1976.
[16] R. Ramakumar, "Utilization of solar and wind energy to improvethe living environment in less developed countries," in Proc. 22ndAnnu. Tech. Meeting Institute ofEnvironmental Sciences, Phila-delphia, PA, 1976, pp. 314-318.
[17] National Academy of Sciences, Ad Hoc Panel of the AdvisoryCommittee on Technology Innovation, W. L. Hughes, Chairman,"Energy for rural development-Renewable resources and alter-native technologies for developing countries," Tech. Rep. 1976.
[18] R. Revelle, "Energy use in rural India," Science, vol. 192, pp.969-975, 1976.
[19] H. J. Allison etal., "An energy center in Sri Lanka," inProc. 11 thIntersoc. Energy Conversion Engineering Conference (IECEC),vol. I, State Line, NV, 1976, pp. 58-63.
[20] A. Makhijani, "Solar energy and rural development for the thirdworld," Bull. Atomic Scientist, vol. 32, no. 6, pp. 14-24, 1976.
[21] R. Ramakumar, "Technical and socio-economic aspects of solarenergy and rural development in developing countries," in Proc.Sharing the Sun! Solar Technology in the Seventies Conf., vol. 9,Winnipeg, Man., Canada, 1976, pp. 162-176; also in Solar Energy,vol. 19, pp. 643-649, 1977.
[22] A. K. N. Reddy and K. K. Prasad, "Technological alternatives andthe Indian energy crisis," Economic and Political Weekly, India,vol. 12, nos. 33-34, pp. 1465-1502, 1977.
[23] V. Mubayi and T. Le, "Irrigation in less developed countries,"Brookhaven Nat. Labs, Upton, NY, Tech. Rep., 1977.
[24] D. V. Smith, "Photovoltaic power in less developed countries,"Mass. Inst. Technol. Lincoln Lab., Lexington, MA, Rep. COO-4094-1, prepared for ERDA, 1977.
[25] R. C. Loehr, "Methane from human, animal and agriculturalwastes," presented at the AAAS Symp. Renewable Energy Re-sources and Rural Life in the Developing World, Denver, CO,1977.
[26] National Academy of Sciences, Ad Hoc Panel of the AdvisoryCommittee on Technology Innovation, "Methane generationfrom human, animal and agricultural wastes," Rep., 1977.
[27] Brookhaven National Laboratories, "'Energy needs, uses and re-sources in developing countries," Brookhaven Nat. Labs, Upton,NY, Rep. BNL 50784 prepared for the U.S. Agency for Int.Development and the U.S. Dep. of Energy, 1978.
[28] B. G. Desai, "Solar electrification and rural electrification-Atechno-economic review," in Proc. Int. Solar Energy Congr.,vol. 1, New Delhi, India, 1978, pp. 211-213.
[291 R. Ramakumar, "Prospects for harnessing renewable energy sourcesin developing countries," in Proc. Int. Solar Energy Congr., vol1, New Delhi, India, 1978, pp. 140-144.
[30] I. H. Usmani, "Rural electriflcation: An alternative for the ThirdWorld," Nat. Resources Forum, no. 2, pp. 271-277, 1978.
[31] N. L. Brown and J. W. Howe, "Solar energy for village develop-ment," Science, vol. 199, no. 10, pp. 651-657, 1978.
[32] H. C. Yim, "Analysis of alternatives for U.S. international co-operation in solar energy," in Proc. Int. Solar Energy Congr., vol.1, New Delhi, India, 1978, pp. 12-16.
[331 A.A.S. Rao, "Solar energy: UNIDO programme of action fordeveloping countries," in Proc. Int. Solar Energy Congr., vol. 1,New Delhi, India, 1978, pp. 17-21.
[34] B. Chatel, "Some solar energy programs in the United Nationssystem," in Proc. Int. Solar Energy Congr., vol. 1, New Delhi,India, 1978, pp. 26-30.
[35] M. Alonso and M. de Santiago, "Solar energy in Latin America:An overview," in Proc. Int. Solar Energy Congr., vol. 1, NewDelhi, India, 1978, pp. 33-38.
[36] T. A. Lawand and G. L. d'Ombrain, "Are all solar energy appli-cations necessarily appropriate technologies?," in Proc. Int. SolarEnergy Congr., vol. 1, New Delhi, India, 1978 pp. 39-42.
[37] V. Smil, "Energy flows in the developing world," Amer. Scientist,vol. 67, no. 5, pp. 522-531, 1979.
[38] J. H. Ashworth and R. E. Meunier, "International developmentassistance for renewable technologies: Current programs andinstitutional requirements," inSUNII, Proc. Silver Jubilee Congr.,ISES, vol. 2, Atlanta, GA, 1979, pp. 1460-1464.
[391 J. Gururaja and A. Ramachandran, "Characteristics of rural energydemand and major barriers and tasks and implementation of po-tentially viable solar technologies," in SUN II, Proc. Silver JubileeCongr. ISES, vol. 2, Atlanta, GA, 1979, pp. 1466-1470.
[40] J. L. Sloop et al., "Solar energy in Africa: Survey of needs and
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activities; potential applications of small solar energy systems,"in SUN II, Proc. Silver Jubilee Congr. ISES, vol. 2, Atlanta, GA,1979, pp. 1471-1474.
[41] H. J. AUison, "A renewable energy system for developing coun-tries," in SUNII, Proc. SilverJubilee Congr. ISES, vol. 2, Atlanta,GA, 1979, pp. 1475-1479.
[42] B. A. Ajakaiye, "Prospects for solar cooling applications inNigeria," in SUNII, Proc. Silver Jubilee Congr. ISES, vol. 2Atlanta, GA, 1979, pp. 1481-1484.
[43] D. Cavard and P. Criqui "Energy systems based on local renew-able energy resources for a rural community in a developingcountry," in SUN II, Proc. Silver Jubilee Congr. ISES, vol. 2,Atlanta, GA, 1979, pp. 1485-1489.
[44] J. Keiser et al., "A solar-powered irrigation system for Bakel,Senegal," in SUN II, Proc. Silver Jubilee Congr. ISES, vol. 2,Atlanta, GA, 1979, pp. 1492-1495.
[45] P. Hayes, "Energy use in Pura Village, India," Soft Energy Notes,vol. 2, pp. 53-54, 1979.
[46] R. Ramakumar and J. C. Beavers, "Perspectives on developingcountry solar energy applications," inProc. 14th Intersoc. EnergyConversion Engineering Conf (IECEC), vol. I, Boston, MA, 1979,pp. 93-98.
[47] "Energy for developing countries," EPRI J., pp. 12-15, 1980.[48] R. W. Matlin, "Photovoltaic-powered water pumps for Third
World applications," in Proc. 1980 Annu. MeetingAS ofISES,vol. 3.2, Phoenix, AZ, 1980, pp. 1017-1020.
[49] P. Hayes and C. Drucker, "Community biogas in India," SoftEnergy Notes, vol. 3, no. 2, pp. 10-13, 1980.
[50] 1. Fore, "Micro-hydro designed for Papua, New Guinea," SoftEnergy Notes, vol. 3, no. 4, pp. 20-21, 1980.
[51] W. Sassin, "Energy," Sci Amer., vol. 243, no. 3, pp. 118-132,1980.
[52] National Academy of Sciences, 2ndAd Hoc Panel ofthe AdvisoryCommittee on Technology Innovation, Board of Science andTechnology for International Development, Commission onInternational Relations, "Supplementary information on energyfor rural development," Rep., Washington, DC, to be published.
[53] R. S. Smith, "The United States and the Third World," U.S. Dep.of State, Washington, DC, Discussion Paper 8863, 1976.
[54] S. Balaraman et al., "Goals of basic engineering education inIndia," Eng. Educ., vol. 69, no. 2, pp. 169-175, 1978.
R. Ramakumar (M'62-SM'75) was born inCoimbatore, India, on October 17, 1936. Hereceived the B.E. degree in electrical engineeringfrom the University of Madras, Madras, India,in 1956, securing the first rank in that field, theM.Tech. degree from the Indian Institute ofTechnology, Kharagpur, India, in 1957, and thePh.D. degree in electrical engineering from
1lE Conell University, Ithaca, New York, in 1962.From 1957 to 1967 he served on the faculty
of Coimbatore Institute of Technology, Coim-
batore, India, affiliated with the University of Madras. He then came toOklahoma State University, Stillwater, where he currently is a Professorof Electrical Engineering. At Oklahoma State University, he has beeninvolved in research related to conventional and unconventional energyconversion, energy storage, renewable energy sources and systemsdevelopment and application, especially in developing countries. Dur-ing 1978-79 he was a consultant to the Jet Propulsion Laboratory inPasadena, CA. He has published over 70 technical papers in variousjournals, transactions, and national and international conference pro-ceedings, coauthored three U.S. Patents, and contributed chapters intwo books and sections in three handbooks in the areas of energy andpower engineering.Dr. Ramakumar is a member of the Energy Development Subcom-
mittee ofthe IEEE Power Engineering Society, theWind Division Boardof the American Section of the International Solar Energy Society, theAmerican Society for Engineering Education, the International SolarEnergy Society, Eta Kappa Nu, and Sigma Xi. He is a Registered Profes-sional Engineer in the State of Oklahoma.
William L. Hughes (S'48-A'50-M'55-F'62)was born in Rapid City, SD, on December 2,1926. He received'the B.S. degree in electricalengineering from the South Dakota School ofMines and Technology, Rapid City, in 1949,and the M.S. and Ph.D. degrees in electricalengineering from Iowa State University, Ames,in 1950 and 1952, respectively.From 1944 to 1946 he served in the U.S.
Navy. From 1949 to 1960 he served on thefaculty of Iowa State University. From 1960
to 1976 he served as Professor and Head of Electdcal Engineering atOklahoma State University, Stillwater. At present, he is Director ofthe Engineering Energy Laboratory and Clark A. Dunn Professor ofEngineering at Oklahoma State University. His wide range of researchinterests include electromagnetic radiation, color television systems,and energy. For the past 20 years, he has been primarily concernedwith energy conversion and energy storage, fuel cells and electrolysis,wind and solar energy systems, and special electrical energy conversiondevices. He has authored or coauthored numerous papers and hasseveral patents in these fields. He is also the author of two textbooksand several chapters and sections in many handbooks. He has been aconsultant to several companies both in the U.S. and abroad. He hasassisted the U.S. Agency for International Development and the NationalAcademy of Sciences in the assessment of the energy problems of manydeveloping countries around the world. He chaired the NationalAcademy of Sciences panel that published "Energy for rural develop-ment" in 1976 and its supplement due to come out in 1981.
Dr. Hughes holds memberships in many professional and honorarysocieties. He is a Registered Professional Engineer in the States ofOklahoma and Iowa.
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