Post on 26-Dec-2015
transcript
Sarfraz H DairkeeLEED AP, CEM, CEA, CBCP, PSAT
Arab Climate Resilience Initiative
The Pursuit Towards Sustainable Energy-
Resources, Challenges and Opportunities
A Quest for Another Perspective ………
The Engineer’s View
Supply Management
Generate more electricity by increasing production or improving efficiency
of conventional technology.
What we are forgetting is that all the forms of energy are not equal
or alike.
Some forms of energy may be better suited to be directly
applied to demands rather than through conversion to and expenditure of electricity.
Matching appropriate energy supply to end use is the
answer.
Broadening Our Perspective
Why is it that we only think of electricity when considering
Energy?Energy = Exergy + Anergy
Electricity is the highest form of energy; it is Exergy itself.
Practically, due to imperfect
efficiency, electricity usage leads to both Exergy and Anergy.
?Are we forgetting something again
?
Consumers don't demand energy, they demand goods
and services.
Electricity is not an end in itself. It is only ONE of the means of
ensuring delivery of these needs.
The other ways…
There are various other forms of energy available to our disposal such as solar, wind, hydel, tidal,
diurnal differentials
Conventional wisdom is to use these renewable forms to
generate electricity.
The quality of different forms of energy
QUALITY OF ENERGY
FORM OF ENERGY
QUALITY INDEX
(%EXERGY)
Extra superior Potential energyKinetic energyElectrical energy
Nuclear energy
100100100
almost 100
Superior SunlightChemical energyHot steamDistrict heating
9595
6030
Inferior Waste heat 5
Value Less Heat radiation from the earth 0
The 'Energy Crisis' does not stem from a lack of energy…
…but from a failure to match forms of energy to the real
requirements of the consumer Amory Lovins
The Softpath ApproachProposed by Amory Lovins
A soft energy path is one that is pliable, one that matches the energy
source to the energy demand.
There is no demand for electricity, oil or Uranium. The demand is for needs
and comforts.
The soft path approach is about supplying the most appropriate
energy in the most energy efficient way to meet those needs directly.
Features of Soft-energy PathsProposed by Amory Lovins
- Rely upon natural energy flows
- Are diverse, thus not over-dependent upon any one source
- Are flexible using local resources and materials - Are matched in scale to end use needs - Are in harmony with environment aligning with nature rather than controlling it - Are matched in energy type and
quality to end use needs
- Are resilient
Practical applications for building designs in the Middle East
Indoor illumination and water heating using solar insolation.
Natural ventilation using wind energy to ensure healthy indoor air quality.Temperature control and cooling using diurnal variation of humidity, temperature and wind conditions.
To sum it up…
Think beyond electric/grid power. There’s more to energy than electricity.
High Exergy solutions may be the most convenient but are not the most optimum and sustainable.
Matching appropriate forms of energy directly with needs can yield significant efficiency gains.
The environment is your ally. Work with it rather than against it!
We must remember that …‘There is no free lunch’ let us try that our future
generations do not have to pay for our mistakes.