Jatropha Seed Cooking Stove: Development and Promotion

ETHOS Conference 2011Jatropha Seed CookingStove: Development andPromotionJonathan OttoDavid OttoDavid CovertPamoja Inc, Chester, VTJCS, Seattle, WA

ETHOS Conference 2011Jatropha Seed Cooking StoveSmall scale charcoal ‘burning’

ETHOS Conference 2011Jatropha Seed Cooking StoveCharcoal making operations

ETHOS Conference 2011Jatropha Seed Cooking StoveCharcaol making, eastern Uganda

ETHOS Conference 2011Jatropha Seed Cooking StoveCharcaol making, the larger view

ETHOS Conference 2011Jatropha Seed Cooking StoveCharcaol making that pollutes the entire valley

ETHOS Conference 2011Jatropha Seed Cooking StoveCharcoal for sale by the side of the road

ETHOS Conference 2011Jatropha Seed Cooking StoveFetching firewood, women’s daily chore

ETHOS Conference 2011Jatropha Seed Cooking StoveFirewood for sale

ETHOS Conference 2011Jatropha Seed Cooking StoveFirewood heading to market

ETHOS Conference 2011Jatropha Seed Cooking StoveTypical 3 Stove cooking arrangement

ETHOS Conference 2011Jatropha Seed Cooking StoveUnvented indoor cooking area

ETHOS Conference 2011Jatropha Seed Cooking StoveUnvented cooking area

ETHOS Conference 2011Jatropha Seed Cooking Stove‘Of course I know it’s not healthy, but what choice do I have?’

ETHOS Conference 2011Jatropha Seed Cooking StoveImmature seed pods

ETHOS Conference 2011Jatropha Seed Cooking StoveSeed pods as they mature

ETHOS Conference 2011Jatropha Seed Cooking StoveDry seed pods ready for harvesting

ETHOS Conference 2011Jatropha Seed Cooking StoveIs in a tree or a shrub?

ETHOS Conference 2011Jatropha Seed Cooking StoveYoung hedge, in need of trimming

ETHOS Conference 2011Jatropha Seed Cooking StoveYoung hedge about one year after planting

ETHOS Conference 2011Jatropha Seed Cooking StoveYoung hedge about 18 months old, with drip irrigation

ETHOS Conference 2011Jatropha Seed Cooking StovePruning stimulates more flowering near end of new growth

ETHOS Conference 2011Jatropha Seed Cooking StoveLand reclamation with Jatropha contour planting

ETHOS Conference 2011Jatropha Seed Cooking StoveMatooke plantation with Jatropha and vanilla

ETHOS Conference 2011Jatropha Seed Cooking StoveJatropha supporting vanilla vine

ETHOS Conference 2011Jatropha Seed Cooking StoveVanilla tendril attached to Jatropha branch

ETHOS Conference 2011Jatropha Seed Cooking StoveSeedlings ready to be planted out

ETHOS Conference 2011Jatropha Seed Cooking StovePlantation … a questionable practice

ETHOS Conference 2011Jatropha Seed Cooking StoveR Henning’s count of Jatropha projects in 2008

ETHOS Conference 2011Jatropha Seed Cooking StoveCenter for Research on Energy and Energy Conservations (CREEC) lab at Makerere University,Kampala Uganda

ETHOS Conference 2011Jatropha supporting vanilla vineCREEC lab with Aprovecho PEMS test equipment

ETHOS Conference 2011Jatropha Seed Cooking StoveCREEC lab; testing an earlier model of the JCS stove

ETHOS Conference 2011Jatropha Seed Cooking StoveCREEC lab Aprovecho PEMS test equipment

ETHOS Conference 2011Jatropha Seed Cooking StoveWater temperature check at CREEC

ETHOS Conference 2011Jatropha Seed Cooking StoveSadaam, the master tinsmith with a skirt; price: $8.79

ETHOS Conference 2011Jatropha Seed Cooking StovePrototype stove with thermocouple temperature sensors

ETHOS Conference 2011Jatropha Seed Cooking StoveCooking pot sets into skirt

ETHOS Conference 2011Jatropha Seed Cooking StovePrototype stove: body and skirt

ETHOS Conference 2011Jatropha Seed Cooking Stove‘Sufria’ cooking pot being inserted in stove skirt

ETHOS Conference 2011Jatropha Seed Cooking StovePrototype stove ready to be top lit

ETHOS Conference 2011Jatropha Seed Cooking StoveCombustion chamber

ETHOS Conference 2011Jatropha Seed Cooking Stovegasification!

ETHOS Conference 2011Jatropha Seed Cooking StoveInternal parts

ETHOS Conference 2011Jatropha Seed Cooking StovePrimary air inlet holes and central duct, secondary air inlet

ETHOS Conference 2011Jatropha Seed Cooking StovePrimary air inlet holes and central duct, secondary air inlet

ETHOS Conference 2011Jatropha Seed Cooking StoveRiser with secondary air inlet holes

ETHOS Conference 2011Jatropha Seed Cooking StoveAchievements thus far:• Have met boiling, simmer and emissions benchmarks.• Achieved temp. of 800C, 15 cm above combustion zone.• Temperature in that zone is stable for 20 minutes.• Flame in combustion zone is “flat”, < 10 cm high.• Mixing of primary air with secondary air is very good.

ETHOS Conference 2011Jatropha Seed Cooking StovePEMS graph of the last burn at CREEC, November 2011Green, CO 2Red, COGrey, Particulate Material

ETHOS Conference 2011Jatropha Seed Cooking StoveThe combustion zone

ETHOS Conference 2011Jatropha Seed Cooking Stove• Jatropha caloric content, Dar es Salaam, 21,500 K Joule/kg• Fuel charge for representative test burn, 0.65 kg• Heat value of fuel charge, 13,975 K Joule• Heat output of stove through end of boil, 4300 K Joule8000 BTU/hr• Thermal Efficiency: 31%energy transferred to sufria and water through end of boilcf. energy in 0.65 kg jatropha.

ETHOS Conference 2011Jatropha Seed Cooking StoveAnticipated tasks related to kitchen use and field testing:• Variable fuel amounts and types.More than nominal 650 g does not work!Amounts less than 500 g have yet to be tested.Other fuels or mixtures with jatropha need to be tested.• Try to achieve longer burn time with lower energy output.• Make use of charcoal combustion phase.

ETHOS Conference 2011Jatropha Seed Cooking StoveWork in progressParticulate and gas phase emission testing:• Previous version was tested with APROVECHO PEMS atMakerere University, Uganda.• Present version will be tested for particulate and carbonmonoxide emissions with modified APROVECHO IAP in Feb.2011.• Indoor air will be monitored with APROVECHO IAP duringfield testing of JSCS in Tanzania this year.