The document discusses the Centre for Energy Studies (CES) in Nepal and its work related to cookstove testing and development. CES was established in 2003 by the Government of Nepal to conduct research, expert consultation, and testing in renewable energy, energy efficiency, and energy planning. It has laboratories for cookstove and fuel testing, and has been involved in various cookstove design projects through student theses and research. CES uses standard testing methods like water boiling tests and measures stove thermal efficiency. It aims to provide national standards for fuel calorific values and help harmonize cookstove testing data in Nepal.

1. A
Presentation
on
National Workshop on Standards
and Testing of Cook stoves in Nepal
Roshan Pandey
Researcher
Centre for Energy Studies (CES), IOE
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2. Lab at CES
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3. CES Description
• Fully funded by HMG/N (no donors involved) with a budget of
Rs. 60 Million ONLY for building and equipment
• Total Land covered by Zero Energy House and Energy Park: 30
Ropanies
• Building is three and half storey with total floor area 20,000sq.
ft
• Fully designed by IOE engineers and architects
• Site favorable with south side open and east side slopping with
head different of 12 meter.
• CES office, Seminar Hall, Classrooms, research cubicles,
labs/workshops, 4 standard guest rooms
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4. Centre for Energy Studies
• Established by Government of Nepal in 2003
Working for the R & D
• Running two Faculty in Masters
 Master of Science in Renewable Energy
Engineering
Master of Science in Energy System Planning and
Management
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5. CES Working Areas
• Field of research, Experts consultation and
testing regarding
Renewable Energy Technologies
Energy efficiency
Energy planning and modeling for Energy policy
Climate Change and Energy
Design and Development in Energy sector
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6. CES involvement in
Cooking Stove
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Different two pots cooking stoves
The design of an Improved Cook Stove (ICS) involves the application of heat transfer,
combustion and fluid flow principles in order to attain complete combustion of the
fuel with a minimum amount of excess air, maximum transfer of heat from the flame
and the flue gases to the cooking vessel, and a minimum loss of heat to the
surroundings. The stove consists in principle of a combustion chamber, pot holder
and baffle depending upon the type of stove and chimney.

7. Schematic design of one pot cooking
stove by CES as B.E project
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The thermal efficiency obtained by sinking the pot into the
combustion chamber observed at cold start was 22%, at hot
start was 23% and at simmering was 20%.

8. CES activities in Cook stoves
• We are having at least one project every year
on stoves in B.E Mechanical
• At least one thesis in M.Sc. in Renewable
Energy Engineering
• Now a days these types of research are also
doing in PhD level from same department.
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9. CES activities in Cook stoves
• Recently, B.E students
have designed the bio
char stove and other
groups studying on
same bio char for
fertilizer performance.
• Result yet to come !!!
Bio char stove
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10. Current Testing Practices and
Testing Protocols Updates
Water Boiling Test version 3.0 (WBT)
– Shell Foundation HEH Project Water Boiling Test
spread sheet have been using now a days other
than simple excel sheet for maintaining accuracy
in testing
– Similarly, lab calculated calorific value of solid fuel
are used. Using CES bomb calorimeter setup.
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11. Stove Testing
• A large number of variables were taken into account for a truly
comparable study in the laboratory as well as in the field to some
extent. The tests designed here revealed qualitative and
quantitative information about the improved stove performance as
follows:
• the thermal efficiency or percentage heat utilized (PHU) for boiling
certain amount of water
• the amount of fuel required to cook a given quantity of food
• the range of power output
• the case of operation
• level of pollution
• maintenance requirements
• life time
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12. Methods used and applied
• Water Boiling Test version 3.0 (WBT)
• We generally used this excel sheet hyperlinked
below
wbt_data-calculation_sheet_3.0.xls
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13. Methods used and applied
• Efficiency = {Sw ∗Wm (Tf−Ti) + L∗We } /
{(Efm∗Wf )/(1+0.01*β)} −(29000∗C)} 100%
…………………….Equation (1)
• Where,
• C- coal remaining
• Efm -calorific value of wood
• L - latent heat of water
• Sw -specific heat of water
• Tf - final temperature of water
• Ti -initial temperature of water
• We- weight of water evaporated
• Wf- firewood used
• Wm- weight of water taken
• β – lower calorific value of fuel
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14. Equipments
• Equipment used for the Water Boiling Test
a) Scale with a capacity of at least 6 kg an accuracy of ±1
gram
b) Digital Thermometer, accurate to 1/10 of a degree, with
thermocouple probe suitable for immersion in liquids
and Wood moisture meter (optional)
d) Timer
e) Wood fixture for holding thermocouple probe in water
f) At least 10 liters of clean water for each WBT (in
locations where water is scarce, this may be cooled and
reused for later tests)
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15. Equipments
g) Heat resistant pad to protect scale
h) Small shovel/spatula to remove charcoal from
stove
i) Tongs for handling charcoal
j) Dust pan for transferring charcoal
k) Metal tray to hold charcoal for weighing
l) Heat resistant gloves
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16. Other equipments
• We do have lab for
calculation of standard
calorific value of solid
fuel using bomb
calorimeter and CES is
devoting to give
national standard
calorific value of solid
fuel like fuel wood, agro
residue, coke, coal etc.
Bomb calorie meter
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17. Average energy contents
of solid biomass
• Wood fuels- 17.0 MJ/Kg
• Animal dung – 10.9 MJ/Kg
• Agriculture waste – 12.6 MJ/Kg
• Rick husk – 13.6 MJ/Kg
• Charcoal- 28.4 MJ/Kg
(Source: Bio fuel Lab, CES/IOE/T.U., 2012)
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18. Issues related to lab and
field testing
• This organization also have some problem
regarding material (standard fuel) selection
and harmonization in data calculation with
other institute for output comparison and
about researcher .
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19. CES Stove Testing Station
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20. TCS and ICS testing lab
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21. TCS and ICS testing lab
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22. Bio Ethanol testing lab
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23. Cont….
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24. Locally produced kerosene like
bio-liquid
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25. 7/28/2013 26
Purified Khoto as local kerosene

26. 7/28/2013 27
Resin based Stove

27. 7/28/2013
Thank you ! ! !
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