INFINERGY
SHEPHERDS' RIG WIND FARM APPENDIX 21.1
CARBON CALCULATOR RESULTS
Prepared By:
Arcus Consultancy Services
7th Floor 144 West George Street
Glasgow G2 2HG
T +44 (0)141 221 9997 l E [email protected]
w www.arcusconsulting.co.uk
Registered in England & Wales No. 5644976
Carbon Calculator
Shepherds’ Rig Wind Farm
Infinergy Arcus Consultancy Services November 2018 Page i
TABLE OF CONTENTS
PAYBACK TIME AND CO2 EMISSIONS ................................................................................. 1
PAYBACK TIME CHARTS ....................................................................................................... 2
INPUT DATA ......................................................................................................................... 4
1 WINDFARM CO2 EMISSION SAVING ...................................................................... 11
2 CO2 LOSS DUE TO TURBINE LIFE ............................................................................ 12
3 CO2 LOSS DUE TO BACKUP ..................................................................................... 13
4 LOSS OF CO2 FIXING POTENTIAL ........................................................................... 14
5 LOSS OF SOIL CO2 (A,B) ......................................................................................... 15
6 CO2 LOSS BY DOC & POC LOSS ............................................................................... 18
7 FORESTRY CO2 LOSS ............................................................................................... 19
8 CO2 GAIN – SITE IMPROVEMENT ........................................................................... 20
Carbon Calculator
Shepherds’ Rig Wind Farm
Infinergy Arcus Consultancy Services November 2018 Page 1
PAYBACK TIME AND CO2 EMISSIONS
1. Windfarm CO2 emissions saving over… Exp Min. Max.
…coal-fired electricity generation (t CO2 / yr) 163,640 124,862 187,384
….grid-mix of electricity generation (t CO2 / yr) 50,069 38,204 57,334
….fossil fuel-mix of electricity generation (t CO2 yr) 81,998 62,567 93,896
Energy output from windfarm over lifetime (MWh) 4,456,431 3,400,369 5,103,050
Total CO2 losses due to wind farm (TCO2 eq.) Exp. Min. Max.
2. Losses due to turbine life (e.g. manufacture, construction, decomissioning) 69,175 58,523 69,175
3. Losses due to backup 32,156 27,562 32,156
4. Losses due to reduced carbon fixing potential 689 146 1,486
5. Losses from soil organic matter 9,565 -2,581 170,247
6. Losses due to DOC & POC leaching 0 0 1
7. Losses due to felling forestry 0 0 0
Total losses of carbon dioxide 111,585 83,650 273,065
8. Total CO2 gains due to improvement of site (t CO2 eq.) Exp. Min. Max.
8a. Change in emissions due to improvement of degraded bogs 0 0 0
8b. Change in emissions due to improvement of felled forestry 0 0 0
8c. Change in emissions due to restoration of peat from borrow pits -105 0 -161
8d. Change in emissions due to removal of drainage from foundations & hardstanding -580 0 -1,910
Total change in emissions due to improvements -685 0 -2,072
RESULTS Exp. Min. Max.
Net emissions of carbon dioxide (t CO2 eq.) 110,900 81,578 273,065
Carbon Payback Time
...coal-fired electricity generation (years) 0.7 0.4 2.2
...grid-mix of electricity generation (years) 2.2 1.4 7.1
...fossil fuel-mix of electricity generation (years) 1.4 0.9 4.4
Ratio of soil carbon loss to gain by restoration (not used in Scottish applications) 13.97 -1.25 No gains!
Ratio of CO2 eq. emissions to power generation (g/kWh) (for info. only) 24.89 15.99 80.3
Carbon Calculator
Shepherds’ Rig Wind Farm
Arcus Consultancy Services Infinergy Page 2 November 2018
PAYBACK TIME CHARTS
Gre
enho
use
gas
emis
sion
s (t
CO
2 eq
.)
Sou
rces
Pro
porti
ons
of g
reen
hous
e ga
s em
issi
ons
from
diff
eren
t sou
rces
Sou
rces
Turb
ine
life
Back
up
Bog
plan
ts
Soil
orga
nic
carb
on
DOC
& P
OC
Man
agem
ent o
f for
estr
y
Impr
oved
deg
rade
d bo
gs
Impr
oved
felle
d fo
rest
ry
Rest
ored
bor
row
pits
Stop
dra
inag
e of
foun
da�o
ns
Pay
back
Tim
eP
ayba
ckTi
me
-Cha
rtsIn
putD
ata
Car
bon
payb
ack
time
(mon
ths)
usi
ng fo
ssil-
fuel
mix
as
cont
erfa
ctua
l
Pay
back
Tim
e - C
harts
Carbon Calculator
Shepherds’ Rig Wind Farm
Arcus Consultancy Services Infinergy Page 4 November 2018
INPUT DATA
1/6
Carb
on C
alcu
lato
r v1
.5.0
Shep
herd
's R
ig W
ind
Farm
Loca
tion:
55.2
1729
8-4
.165
693
In�n
ergy
Core
inpu
t da
ta
Inpu
t da
taEx
pect
ed v
alue
Min
imum
val
ueM
axim
umva
lue
Sour
ce o
f dat
a
Win
dfar
m c
hara
cter
istic
sD
imen
sion
sN
o. o
f tur
bine
s19
1919
Sect
ion
4.2
Dur
atio
n of
con
sent
(yea
rs)
2525
25Se
ctio
n 4.
7.1
Perf
orm
ance
Pow
er r
atin
g of
1 tu
rbin
e (M
W)
4.2
3.6
4.2
Sect
ion
4.3.
5Ca
paci
ty fa
ctor
25.5
22.7
29.2
Calc
ulat
ed fr
om a
vera
ge.
Back
upFr
actio
n of
out
put t
o ba
ckup
(%)
44
4se
ctio
n 4.
1.4
Addi
tiona
l em
issi
ons
due
to r
educ
ed th
erm
al e
�ci
ency
of t
he r
eser
vege
nera
tion
(%)
1010
10Fi
xed
Tota
l CO
2 em
issi
on fr
om tu
rbin
e lif
e (tC
O2
MW
-1) (
eg. m
anuf
actu
re,
cons
truc
tion,
dec
omm
issi
onin
g)
Calc
ulat
e w
rtin
stal
led
capa
city
Calc
ulat
e w
rtin
stal
led
capa
city
Calc
ulat
e w
rtin
stal
led
capa
city
Char
acte
rist
ics
of p
eatla
nd b
efor
e w
indf
arm
dev
elop
men
tTy
pe o
f pea
tland
Acid
bog
Acid
bog
Acid
bog
Peat
Slid
e Ri
sk A
sses
smen
t Tec
hnic
al A
ppen
dix
Aver
age
annu
al a
ir te
mpe
ratu
re a
t site
(°C)
6.5
310
Calc
ulat
ed fr
om c
limat
e av
erag
es fo
r ar
ea.
Aver
age
dept
h of
pea
t at s
ite (m
)0.
50
4.5
Peat
Slid
e Ri
sk A
sses
smen
t Tec
hnic
al A
ppen
dix
C Co
nten
t of d
ry p
eat (
% b
y w
eigh
t)53
.23
19.5
753
.24
Scot
tish
Gov
ernm
ent G
uida
nce
- Gui
danc
e on
Dev
elop
men
ts o
n Pe
atla
nd -
Site
Sur
veys
Aver
age
exte
nt o
f dra
inag
e ar
ound
dra
inag
e fe
atur
es a
t site
(m)
51
10Te
chni
cal e
stim
atio
n - f
urth
er r
e�ne
d af
ter
drai
nage
inst
alle
d.Av
erag
e w
ater
tabl
e de
pth
at s
ite (m
)0.
50.
40.
6Te
chni
cal e
stim
atio
n.
Dry
soi
l bul
k de
nsity
(g c
m-3
)0.
132
0.07
20.
293
Scot
tish
Gov
ernm
ent G
uida
nce
- Gui
danc
e on
Dev
elop
men
ts o
n Pe
atla
nd -
Site
Sur
veys
Char
acte
rist
ics
of b
og p
lant
sTi
me
requ
ired
for
rege
nera
tion
of b
og p
lant
s af
ter
rest
orat
ion
(yea
rs)
22
2N
ot a
pplic
able
to P
ropo
sed
Dev
elop
men
tCa
rbon
acc
umul
atio
n du
e to
C �
xatio
n by
bog
pla
nts
in u
ndra
ined
peat
s (tC
ha-
1 yr
-1)
0.25
0.12
0.31
SNH
Gui
danc
e -C
arbo
n Pa
ybac
k Ca
lcul
ator
:G
uide
lines
on
Mea
sure
men
ts
Fore
stry
Pla
ntat
ion
Char
acte
rist
ics
Area
of f
ores
try
plan
tatio
n to
be
felle
d (h
a)0
00
Sect
ion
7.9.
4
Aver
age
rate
of c
arbo
n se
ques
trat
ion
in ti
mbe
r (tC
ha-
1 yr
-1)
3.6
2.5
4.7
Scot
tish
Gov
ernm
ent a
nd S
NH
Gui
danc
e
2/6
Inpu
t da
taEx
pect
ed v
alue
Min
imum
val
ueM
axim
umva
lue
Sour
ce o
f dat
a
Coun
terf
actu
al e
mis
sion
fact
ors
Coal
-�re
d pl
ant e
mis
sion
fact
or (t
CO
2 M
Wh-
1 )0.
918
0.91
80.
918
Gri
d-m
ix e
mis
sion
fact
or (t
CO
2 M
Wh-
1 )0.
2808
80.
2808
80.
2808
8
Foss
il fu
el-m
ix e
mis
sion
fact
or (t
CO
2 M
Wh-
1 )0.
460.
460.
46
Borr
ow p
itsN
umbe
r of
bor
row
pits
22
2Bo
rrow
Pit
Asse
ssm
ent T
echn
ical
App
endi
xAv
erag
e le
ngth
of p
its (m
)13
512
514
5Bo
rrow
Pit
Asse
ssm
ent T
echn
ical
App
endi
xAv
erag
e w
idth
of p
its (m
)72
.560
85Bo
rrow
Pit
Asse
ssm
ent T
echn
ical
App
endi
xAv
erag
e de
pth
of p
eat r
emov
ed fr
om p
it (m
)0.
50.
54.
5Pe
at S
lide
Risk
Ass
essm
ent T
echn
ical
App
endi
xFo
unda
tions
and
har
d-st
andi
ng a
rea
asso
ciat
ed w
ith e
ach
turb
ine
Aver
age
leng
th o
f tur
bine
foun
datio
ns (m
)20
.820
.820
.8Fi
gure
4.3
Aver
age
wid
th o
f tur
bine
foun
datio
ns (m
)20
.820
.820
.8Fi
gure
4.3
Aver
age
dept
h of
pea
t rem
oved
from
turb
ine
foun
datio
ns(m
)1
11
Peat
Slid
e Ri
sk A
naly
sis
Tech
nica
l App
endi
xAv
erag
e le
ngth
of h
ard-
stan
ding
(m)
62.5
62.5
62.5
Figu
re 4
.4Av
erag
e w
idth
of h
ard-
stan
ding
(m)
2525
25Fi
gure
4.4
Aver
age
dept
h of
pea
t rem
oved
from
har
d-st
andi
ng (m
)0.
50
4.5
Peat
Slid
e Ri
sk A
naly
sis
Tech
nica
l App
endi
xVo
lum
e of
con
cret
e us
ed in
con
stru
ctio
n of
the
ENTI
RE w
indf
arm
Volu
me
of c
oncr
ete
(m3 )
1106
611
066
1106
6Se
ctio
n 4.
3.68
Acce
ss tr
acks
Tota
l len
gth
of a
cces
s tr
ack
(m)
1100
010
000
1200
0Se
ctio
n 4.
3.24
Exis
ting
trac
k le
ngth
(m)
3000
3000
3000
Calc
ulat
ed fr
om C
AD d
raw
ings
.Le
ngth
of a
cces
s tr
ack
that
is �
oatin
g ro
ad (m
)0
00
No
appl
icab
le to
Pro
pose
d D
evel
opm
ent
Floa
ting
road
wid
th (m
)5
57
No
appl
icab
le to
Pro
pose
d D
evel
opm
ent
Floa
ting
road
dep
th (m
)0
00
No
appl
icab
le to
Pro
pose
d D
evel
opm
ent
Leng
th o
f �oa
ting
road
that
is d
rain
ed (m
)0
00
No
appl
icab
le to
Pro
pose
d D
evel
opm
ent
Aver
age
dept
h of
dra
ins
asso
ciat
ed w
ith �
oatin
g ro
ads
(m)
00
0N
o ap
plic
able
to P
ropo
sed
Dev
elop
men
tLe
ngth
of a
cces
s tr
ack
that
is e
xcav
ated
roa
d (m
)40
0035
0045
00Se
ctio
n 4.
3.24
Exca
vate
d ro
ad w
idth
(m)
55
5Se
ctio
n 4.
3.24
and
follo
win
g se
ctio
nsAv
erag
e de
pth
of p
eat e
xcav
ated
for
road
(m)
0.5
0.5
0.5
Peat
Slid
e Ri
sk A
naly
sis
Tech
nica
l App
endi
xLe
ngth
of a
cces
s tr
ack
that
is r
ock
�lle
d ro
ad (m
)40
0035
0045
00Se
ctio
n 4.
3.24
Rock
�lle
d ro
ad w
idth
(m)
55
5Se
ctio
n 4.
3.27
Rock
�lle
d ro
ad d
epth
(m)
0.6
0.5
0.7
Tabl
e 4.
2Le
ngth
of r
ock
�lle
d ro
ad th
at is
dra
ined
(m)
1100
010
999
1100
1Se
ctio
n 4.
3.24
Aver
age
dept
h of
dra
ins
asso
ciat
ed w
ith r
ock
�lle
d ro
ads
(m)
0.5
0.5
0.5
Chap
ter
4Ca
ble
tren
ches
Leng
th o
f any
cab
le tr
ench
on
peat
that
doe
s no
t fol
low
acc
ess
trac
ksan
d is
line
d w
ith a
per
mea
ble
med
ium
(eg.
san
d) (m
)0
00
No
appl
icab
le to
Pro
pose
d D
evel
opm
ent
3/6
Inpu
t da
taEx
pect
ed v
alue
Min
imum
val
ueM
axim
umva
lue
Sour
ce o
f dat
a
Aver
age
dept
h of
pea
t cut
for
cabl
e tr
ench
es (m
)0.
50
4.5
Peat
Slid
e Ri
sk A
sses
smen
t Tec
hnic
al A
ppen
dix
Addi
tiona
l pea
t exc
avat
ed (n
ot a
lrea
dy a
ccou
nted
for
abov
e)
Volu
me
of a
dditi
onal
pea
t exc
avat
ed (m
3 )0
00
No
appl
icab
le to
Pro
pose
d D
evel
opm
ent
Area
of a
dditi
onal
pea
t exc
avat
ed (m
2 )0
00
No
appl
icab
le to
Pro
pose
d D
evel
opm
ent
Peat
Lan
dslid
e H
azar
dPe
at L
ands
lide
Haz
ard
and
Risk
Ass
essm
ents
: Bes
t Pra
ctic
e G
uide
for
Prop
osed
Ele
ctri
city
Gen
erat
ion
Dev
elop
men
tsne
glig
ible
negl
igib
lene
glig
ible
Fixe
d
Impr
ovem
ent o
f C s
eque
stra
tion
at s
ite b
y bl
ocki
ng d
rain
s, r
esto
ratio
n of
hab
itat e
tcIm
prov
emen
t of d
egra
ded
bog
Area
of d
egra
ded
bog
to b
e im
prov
ed (h
a)0
00
Not
app
licab
le to
Pro
pose
d D
evel
opm
ent
Wat
er ta
ble
dept
h in
deg
rade
d bo
g be
fore
impr
ovem
ent (
m)
00
0N
ot a
pplic
able
to P
ropo
sed
Dev
elop
men
tW
ater
tabl
e de
pth
in d
egra
ded
bog
afte
r im
prov
emen
t (m
)0
00
Not
app
licab
le to
Pro
pose
d D
evel
opm
ent
Tim
e re
quir
ed fo
r hy
drol
ogy
and
habi
tat o
f bog
to r
etur
n to
its
prev
ious
sta
te o
n im
prov
emen
t (ye
ars)
22
2N
ot a
pplic
able
to P
ropo
sed
Dev
elop
men
t
Peri
od o
f tim
e w
hen
e�ec
tiven
ess
of th
e im
prov
emen
t in
degr
aded
bog
can
be g
uara
ntee
d (y
ears
)2
22
Not
app
licab
le to
Pro
pose
d D
evel
opm
ent
Impr
ovem
ent o
f fel
led
plan
tatio
n la
ndAr
ea o
f fel
led
plan
tatio
n to
be
impr
oved
(ha)
00
0N
ot a
pplic
able
to P
ropo
sed
Dev
elop
men
tW
ater
tabl
e de
pth
in fe
lled
area
bef
ore
impr
ovem
ent (
m)
0.5
0.4
0.6
Not
app
licab
le to
Pro
pose
d D
evel
opm
ent
Wat
er ta
ble
dept
h in
felle
d ar
ea a
fter
impr
ovem
ent (
m)
0.45
0.3
0.55
Not
app
licab
le to
Pro
pose
d D
evel
opm
ent
Tim
e re
quir
ed fo
r hy
drol
ogy
and
habi
tat o
f fel
led
plan
tatio
n to
ret
urn
to it
s pr
evio
us s
tate
on
impr
ovem
ent (
year
s)2
22
Not
app
licab
le to
Pro
pose
d D
evel
opm
ent
Peri
od o
f tim
e w
hen
e�ec
tiven
ess
of th
e im
prov
emen
t in
felle
dpl
anta
tion
can
be g
uara
ntee
d (y
ears
)2
22
Not
app
licab
le to
Pro
pose
d D
evel
opm
ent
Rest
orat
ion
of p
eat r
emov
ed fr
om b
orro
w p
itsAr
ea o
f bor
row
pits
to b
e re
stor
ed (h
a)2.
22.
22.
2Bo
rrow
Pit
Asse
ssm
ent T
echn
ical
App
endi
xD
epth
of w
ater
tabl
e in
bor
row
pit
befo
re r
esto
ratio
n w
ith r
espe
ct to
the
rest
ored
sur
face
(m)
0.5
0.4
0.6
Tech
nica
l ave
rage
use
d.
Dep
th o
f wat
er ta
ble
in b
orro
w p
it af
ter
rest
orat
ion
with
res
pect
toth
e re
stor
ed s
urfa
ce (m
)0.
450.
30.
55Te
chni
cal e
stim
atio
n - r
e�ne
d w
hen
rest
orat
ion
take
n pl
ace.
Tim
e re
quir
ed fo
r hy
drol
ogy
and
habi
tat o
f bor
row
pit
to r
etur
n to
its
prev
ious
sta
te o
n re
stor
atio
n (y
ears
)5
55
Tech
nica
l ave
rage
use
d.
Peri
od o
f tim
e w
hen
e�ec
tiven
ess
of th
e re
stor
atio
n of
pea
t rem
oved
from
bor
row
pits
can
be
guar
ante
ed (y
ears
)10
1010
Tech
nica
l ave
rage
use
d.
Earl
y re
mov
al o
f dra
inag
e fr
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Will
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No
No
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Will
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degr
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n/a
n/a
n/a
Not
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Will
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spe
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No
No
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Expe
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con
tinua
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as
com
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N/A
6/6
Cons
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inpu
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ta
N/A
Carbon Calculator
Shepherds’ Rig Wind Farm
Infinergy Arcus Consultancy Services November 2018 Page 11
1 WINDFARM CO2 EMISSION SAVING
Capacity Factor Direct Input Exp. Min. Max.
Capacity factor (%) 25.5 22.7 29.2
Exp. Min. Max.
Annual energy output from windfarm (MW/yr)
RESULTS
Emissions saving over coal-fired electricity generation (tCO2/yr) 163,640 124,862 187,384
Emissions saving over grid-mix of electricity generation (tCO2/yr) 50,069 38,204 57,334
Emissions saving over fossil fuel - mix of electricity generation (tCO2/yr) 81,998 62,567 93,896
Carbon Calculator
Shepherds’ Rig Wind Farm
Arcus Consultancy Services Infinergy Page 12 November 2018
2 CO2 LOSS DUE TO TURBINE LIFE
Calculation of emisssions with relation to installed capacity Exp. Min. Max.
Emissions due to turbine frome energy output (t CO2) 3457 2896 3457
Emissions due to cement used in construction (t CO2) 3497 3497 3497
RESULTS Exp. Min. Max.
Losses due to turbine life (manufacture, construction, etc.) (t CO2) 69175 58523 69175
Additional CO2 payback time of windfarm due to turbine life
...coal-fired electricity generation (months) 5 6 4
...grid-mix of electricity generation (months) 17 18 14
...fossil fuel - mix of electricity generation (months) 10 11 9
Carbon Calculator
Shepherds’ Rig Wind Farm
Infinergy Arcus Consultancy Services November 2018 Page 13
3 CO2 LOSS DUE TO BACKUP
Exp. Min. Max.
Reserve energy (MWh/yr) 27,962 23,967 27,962
Annual emissions due to backup from fossil fuel-mix of electricity generation (tCO2/yr) 1,286 1,102 1,286
RESULTS
Total emissions due to backup from fossil fuel-mix of electricity generation (tCO2) 32,156 27,562 32,156
Carbon Calculator
Shepherds’ Rig Wind Farm
Arcus Consultancy Services Infinergy Page 14 November 2018
4 LOSS OF CO2 FIXING POTENTIAL
Exp. Min. Max.
Area where carbon accumulation by bog plants is lost (ha) 27.83 12.26 48.42
Total loss of carbon accumulation up to time of restoration (tCO2 eq./ha) 25 12 31
RESULTS
Total loss of carbon fixation by plants at the site (t CO2) 689 146 1486
Additional CO2 payback time of windfarm due to loss of CO2 fixing potential
...coal-fired electricity generation (months) 0 0 0
...grid-mix of electricity generation (months) 0 0 0
...fossil fuel - mix of electricity generation (months) 0 0 0
Carbon Calculator
Shepherds’ Rig Wind Farm
Infinergy Arcus Consultancy Services November 2018 Page 15
5 LOSS OF SOIL CO2 (A,B)
5. Loss of Soil (CO2) Exp. Min. Max.
CO2 loss from removed peat (t CO2 equiv.) 9565.41 -2581.2 154689
CO2 loss from drained peat (t CO2 equiv.) 0 0 15557.6
RESULTS
Total CO2 loss from peat (removed + drained) (t CO2 equiv.) 9565.41 -2581.2 170247
Additional CO2 payback time of windfarm due to loss of soil CO2
...coal-fired electricity generation (months) 0.7 -0.25 10.9
...grid-mix of electricity generation (months) 2.29 -0.81 35.63
...fossil fuel - mix of electricity generation (months) 1.4 -0.5 21.76
5a. Volume of Peat Removed Exp. Min. Max.
Peat removed from borrow pits
Area of land lost in borrow pits (m2) 19575 15000 24650
Volume of peat removed from borrow pits (m3) 9787.5 7500 110925
Peat removed from turbine foundations
Area of land lost in foundation (m2) 8220.16 8220.16 8220.16
Volume of peat removed from foundation area (m3) 8220.16 8220.16 8220.16
Peat removed from hard-standing
Area of land lost in hard-standing (m2) 29687.5 29687.5 29687.5
Volume of peat removed from hard-standing area (m3) 14843.8 0 133594
Peat removed from access tracks
Area of land lost in floating roads (m2) 0 0 0
Volume of peat removed from floating roads (m3) 0 0 0
Area of land lost in excavated roads (m2) 20000 17500 22500
Volume of peat removed from excavated roads (m3) 10000 8750 11250
Area of land lost in rock-filled roads (m2) 20000 17500 22500
Volume of peat removed from rock-filled roads (m3) 12000 8750 15750
Total area of land lost in access tracks (m2) 40000 35000 45000
Total volume of peat removed due to access tracks (m3) 22000 17500 27000
RESULTS
Total area of land lost due to windfarm construction (m2) 97482.7 87907.7 107558
Total volume of peat removed due to windfarm construction (m3) 54851.4 33220.2 279739
5b. CO2 Loss from Removed Peat Exp. Min. Max.
CO2 loss from removed peat (t CO2) 14131.7 1716.33 160005
CO2 loss from undrained peat left in situ (t CO2) 4566.27 4297.5 5315.81
RESULTS
CO2 loss atributable to peat removal only (t CO2) 9565.41 -2581.2 154689
Carbon Calculator
Shepherds’ Rig Wind Farm
Arcus Consultancy Services Infinergy Page 16 November 2018
5c. Volume of Peat Drained Exp. Min. Max.
Total area affected by drainage around borrow pits (m2) 4350 748 10000
Total volume affected by drainage around borrow pits (m3) 1087.5 187 22500
Peat affected by drainage around turbine foundation and hardstanding
Total area affected by drainage of foundation and hardstanding area (m2) 26429 4981.8 56658
Total volume affected by drainage of foundation and hardstanding area (m3) 13214.5 2490.9 127481
Peat affected by drainage of access tracks
Total area affected by drainage of access track(m2) 150000 28998 310020
Total volume affected by drainage of access track(m3) 37500 7249.5 77505
Peat affected by drainage of cable trenches
Total area affected by drainage of cable trenches(m2) 0 0 0
Total volume affected by drainage of cable trneches(m3) 0 0 0
Drainage around additional peat excavated
Total area affected by drainage (m2) 0 0 0
Total volume affected by drainage (m3) 0 0 0
RESULTS
Total area affected by drainage due to windfarm (m2) 180779 34727.8 376678
Total volume affected by drainage due to windfarm (m3) 51802 9927.4 227486
5d. CO2 Loss from Drained Peat Exp. Min. Max.
Calculations of C Loss from Drained Land if Site is NOT Restored after Decomissioning
Total GHG emissions from Drained Land (t CO2 equiv.) 13346 512.9 130117
Total GHG emissions from Undrained Land (t CO2 equiv.) 13346 512.9 114560
Calculations of C Loss from Drained Land if Site IS Restored after Decomissioning
Losses if Land is Drained
CH4 emissions from drained land (t CO2 equiv.) -189.89 -74.13 -34
CO2 emissions from drained land (t CO2) 8657.91 1771.85 21178.7
Total GHG emissions from Drained Land (t CO2 equiv.) 13346 512.9 130117
Losses if Land is Undrained
CH4 emissions from undrained land (t CO2 equiv.) -189.89 -74.13 16.22
CO2 emissions from undrained land (t CO2) 8657.91 1771.85 18600.3
Total GHG emissions from Undrained Land (t CO2 equiv.) 13346 512.9 114560
RESULTS
Total GHG emissions due to drainage (t CO2 equiv.) 0 0 15557.6
Carbon Calculator
Shepherds’ Rig Wind Farm
Infinergy Arcus Consultancy Services November 2018 Page 17
5e. Emissions Rates from Soil Exp. Min. Max.
Calculations following IPCC default methodology
Flooded period (days/year) 178 178 178
Annual rate of methane emission (t CH4-C/ha year) 0.04 0.04 0.04
Annual rate of carbon dioxide emission (t CO2/ha year) 35.2 35.2 35.2
Calculations following ECOSSE based methodology
Total area affected by drainage due to wind farm construction (ha) 18.08 3.47 37.67
Average water table depth of drained land (m) 0.5 0.6 0.6
Selected emission characteristics following site specific methodology
Rate of carbon dioxide emission in drained soil (t CO2/ha year) 17.74 18.9 20.82
Rate of carbon dioxide emission in undrained soil (t CO2/ha year) 17.74 18.9 15.63
Rate of methane emission in drained soil (t CH4-C/ha year) -0.01 -0.03 0
Rate of methane emission in undrained soil (t CH4-C/ha year) -0.01 -0.03 0
RESULTS
Selected rate of carbon dioxide emission in drained soil (t CO2/ha year) 17.74 18.9 20.82
Selected rate of carbon dioxide emission in undrained soil (t CO2/ha year) 17.74 18.9 15.63
Selected rate of methane emission in drained soil (t CH4-C/ha year) -0.01 -0.03 0
Selected rate of methane emission in undrained soil (t CH4-C/ha year) -0.01 -0.03 0
Carbon Calculator
Shepherds’ Rig Wind Farm
Arcus Consultancy Services Infinergy Page 18 November 2018
6 CO2 LOSS BY DOC & POC LOSS
Exp. Min. Max.
Gross CO2 loss from restored drained land (t CO2) 0 0 0
Gross CH4 loss from restored drained land (t CO2 equiv.) 0 0 0
Gross CO2 loss from improved land (t CO2) 0 0 0
Gross CH4 loss from improved land (t CO2 equiv.) 0 0 23.16
Total gaseous loss of C (t C) 0 0 0.57
Total C loss as DOC (t C) 0 0 0.23
Total C loss as POC (t C) 0 0 0.06
RESULTS
Total CO2 loss due to DOC leaching (t CO2) 0 0 0.83
Total CO2 loss due to POC leaching (t CO2) 0 0 0.21
Total CO2 loss due to DOC & POC leaching (t CO2) 0 0 1.04
Additional CO2 payback time of windfarm due to DOC & POC
...coal-fired electricity generation (months) 0 0 0
...grid-mix of electricity generation (months) 0 0 0
...fossil fuel - mix of electricity generation (months) 0 0 0
Carbon Calculator
Shepherds’ Rig Wind Farm
Infinergy Arcus Consultancy Services November 2018 Page 19
7 FORESTRY CO2 LOSS
Exp. Min. Max.
Area of forestry plantation to be felled (ha) 0 0 0
Carbon sequestered (t C ha-1 yr-1) 3.6 2.5 4.7
Lifetime of windfarm (years) 25 25 25
Carbon sequestered over the lifetime of the windfarm (t C ha-1) 90 62.5 117.5
RESULTS
Total carbon loss due to felling of forestry (t CO2) 0 0 0
Additional CO2 payback time of windfarm due to management of forestry
...coal-fired electricity generation (months) 0 0 0
...grid-mix of electricity generation (months) 0 0 0
...fossil fuel - mix of electricity generation (months) 0 0 0
Carbon Calculator
Shepherds’ Rig Wind Farm
Arcus Consultancy Services Infinergy Page 20 November 2018
8 CO2 GAIN – SITE IMPROVEMENT
Degraded Bog Exp. Min. Max.
1. Description of site
Area to be improved (ha) 0 0 0
Depth of peat above water table before improvement (m) 0 0 0
Depth of peat above water table after improvement (m) 0 0 0
2. Losses with improvement
Improved period (years) 0 0 0
Selected annual rate of methane emissions (t CH4-C ha-1 yr-1) 0.486 0.474 0.499
CH4 emissions from improved land (t CO2 equiv.) 0 0 0
Selected annual rate of carbone dioxide emissions (t CO2 ha-1 yr-1) -0.396 -1.327 0.535
CO2 emissions from improved land (t CO2 equiv.) 0 0 0
Total GHG emissions from improved land (t CO2 eqiv.) 0 0 0
3. Losses without improvement
Improved period (years) 0 0 0
Selected annual rate of methane emissions (t CH4-C ha-1 yr-1) 0.486 0.474 0.499
CH4 emissions from improved land (t CO2 equiv.) 0 0 0
Selected annual rate of carbone dioxide emissions (t CO2 ha-1 yr-1) -0.396 -1.327 0.535
CO2 emissions from unimproved land (t CO2 equiv.) 0 0 0
Total GHG emissions from unimproved land (t CO2 eqiv.) 0 0 0
RESULTS
4. Reduction in GHG emissions due to improvement of site
Reduction in GHG emissions due to improvement (t CO2 equiv.) 0 0 0
Carbon Calculator
Shepherds’ Rig Wind Farm
Infinergy Arcus Consultancy Services November 2018 Page 21
Felled Forestry Exp. Min. Max.
1. Description of site
Area to be improved (ha) 0 0 0
Depth of peat above water table before improvement (m) 0.5 0 0.6
Depth of peat above water table after improvement (m) 0.45 0 0.3
2. Losses with improvement
Improved period (years) 0 0 0
Selected annual rate of methane emissions (t CH4-C ha-1 yr-1) -0.012 0.474 0.011
CH4 emissions from improved land (t CO2 equiv.) 0 0 0
Selected annual rate of carbone dioxide emissions (t CO2 ha-1 yr-1) 16.345 -1.327 11.586
CO2 emissions from improved land (t CO2 equiv.) 0 0 0
Total GHG emissions from improved land (t CO2 eqiv.) 0 0 0
3. Losses without improvement
Improved period (years) 0 0 0
Selected annual rate of methane emissions (t CH4-C ha-1 yr-1) -0.013 0.474 -0.001
CH4 emissions from improved land (t CO2 equiv.) 0 0 0
Selected annual rate of carbone dioxide emissions (t CO2 ha-1 yr-1) 17.738 -1.327 20.759
CO2 emissions from unimproved land (t CO2 equiv.) 0 0 0
Total GHG emissions from unimproved land (t CO2 eqiv.) 0 0 0
RESULTS
4. Reduction in GHG emissions due to improvement of site
Reduction in GHG emissions due to improvement (t CO2 equiv.) 0 0 0
Carbon Calculator
Shepherds’ Rig Wind Farm
Arcus Consultancy Services Infinergy Page 22 November 2018
Borrow Pits Exp. Min. Max.
1. Description of site
Area to be improved (ha) 2.2 0 2.2
Depth of peat above water table before improvement (m) 0.5 0.4 0.6
Depth of peat above water table after improvement (m) 0.45 0.5 0.3
2. Losses with improvement
Improved period (years) 5 5 5
Selected annual rate of methane emissions (t CH4-C ha-1 yr-1) -0.012 -0.025 0.011
CH4 emissions from improved land (t CO2 equiv.) -1.94 0 1.803
Selected annual rate of carbone dioxide emissions (t CO2 ha-1 yr-1) 16.345 16.807 11.586
CO2 emissions from improved land (t CO2 equiv.) 92.116 0 65.294
Total GHG emissions from improved land (t CO2 eqiv.) 90.176 0 67.096
3. Losses without improvement
Improved period (years) 5 5 5
Selected annual rate of methane emissions (t CH4-C ha-1 yr-1) -0.013 -0.022 -0.001
CH4 emissions from improved land (t CO2 equiv.) 0 0 0
Selected annual rate of carbone dioxide emissions (t CO2 ha-1 yr-1) 17.738 13.764 20.759
CO2 emissions from unimproved land (t CO2 equiv.) 195.117 0 228.344
Total GHG emissions from unimproved land (t CO2 eqiv.) 195.117 0 228.344
RESULTS
4. Reduction in GHG emissions due to improvement of site
Reduction in GHG emissions due to improvement (t CO2 equiv.) 104.941 0 161.248
Carbon Calculator
Shepherds’ Rig Wind Farm
Infinergy Arcus Consultancy Services November 2018 Page 23
Foundations & Hardstanding Exp. Min. Max.
1. Description of site
Area to be improved (ha) 2.643 0 5.666
Depth of peat above water table before improvement (m) 0.5 0 0.6
Depth of peat above water table after improvement (m) 0.45 0 0.3
2. Losses with improvement
Improved period (years) 23 23 23
Selected annual rate of methane emissions (t CH4-C ha-1 yr-1) -0.012 0.474 0.011
CH4 emissions from improved land (t CO2 equiv.) -10.721 0 21.354
Selected annual rate of carbone dioxide emissions (t CO2 ha-1 yr-1) 16.345 -1.327 11.586
CO2 emissions from improved land (t CO2 equiv.) 509.037 0 773.512
Total GHG emissions from improved land (t CO2 eqiv.) 498.316 0 794.866
3. Losses without improvement
Improved period (years) 23 23 23
Selected annual rate of methane emissions (t CH4-C ha-1 yr-1) -0.013 0.474 -0.001
CH4 emissions from improved land (t CO2 equiv.) 0 0 0
Selected annual rate of carbone dioxide emissions (t CO2 ha-1 yr-1) 17.738 -1.327 20.759
CO2 emissions from unimproved land (t CO2 equiv.) 1078.23 0 2705.12
Total GHG emissions from unimproved land (t CO2 eqiv.) 1078.23 0 2705.12
RESULTS
4. Reduction in GHG emissions due to improvement of site
Reduction in GHG emissions due to improvement (t CO2 equiv.) 579.91 0 1910.25