Presentation on theme: "SELF-SUSTAINING ENERGY COOK STOVE FOR UN-ELECTRIFIED RURAL AREAS PRESENTED BY: RISHA MAL, RAJENDRA PRASAD, V.K. VIJAY, AMIT RANJAN VERMA, RATNESH TIWARI."— Presentation transcript:
SELF-SUSTAINING ENERGY COOK STOVE FOR UN-ELECTRIFIED RURAL AREAS PRESENTED BY: RISHA MAL, RAJENDRA PRASAD, V.K. VIJAY, AMIT RANJAN VERMA, RATNESH TIWARI CENTRE FOR RURAL DEVELOPMENT AND TECHNOLOGY INDIAN INSTITUTE OF TECHNOLOGY, NEW DELHI, INDIA In Engineers in Technical and Humanitarian Opportunities of Service (ETHOS) 2014 January 25-26,Northwest University, 5520 108th Ave. N.E., Kirkland, WA 98033
POPULATION DISTRIBUTION IN INDIA The Rural and Urban population in India was last reported at 69.90 and 30.1 (% of total population) respectively in 2010, according to a Indian Census published in 2011. The growth rate of population in rural and urban areas was 12.18% and 31.80% respectively.
INDIAN RURAL SCENARIO OF COOKING People have gadgets like mobile, motor bike, TV etc, and use sanitary toilets but still use mud stove for cooking!!!!! We need to bridge the gap by technology on stoves with multiple applications to make it acceptable.
HEAT LOSSES Utilization of the waste heat THERMOELECTRIC GENERATOR Useful electricity
POWER GENERATION There are 2 modes of Power generation from a thermoelectric module TE module Seebeck Module Peltier Module Both works vice versa Works as a cooler,which can also work as a generator(proposed by D.M Rowe) Works as a generator, which can also work as a cooler
PELTIER COUPLE + + + + - - - - Hole Flow Electron Flow N-type Bi ₂Te₃ p-type Bi ₂Te₃ Heat Released Heat Absorbed + + - - -- Dense electron and holes +
SEEBECK COUPLE + + + + - - - - Hole Flow Electron Flow N-type Bi ₂Te₃ p-type Bi ₂Te₃ Cold Side Hot Side ++ - - -- Dense electron and holes + Load
MATERIALS 1.The TE couples are connected electrically in series because a single couple produce power in mW, series connection of couples increase the overall voltage generated. They are connected thermally in parallel to reduce the lattice conductivity so that the cold side remains cooler. 2. Semiconductor materials consisting of p-type(excess holes) and n- type(excess e-) are used for fabrication because if two couples consist of metal the voltages gets cancelled by each other resulting in very low power. 3. For generator, the suggested materials for TEG fabrication are PbTe, SiGe, TAGS, Inorganic clathrates, Magnesium group IV compounds, Skutterudite thermoelectrics, Oxide thermoelectrics, Half Heusler alloys and many more. 4. Commercially available TEG are of Bi ₂ Te ₃ with temperature tolerance of 250˚C with Figure of merit (ZT)=1. The PbTe modules are also available in the market with high temperature tolerance of 600 ˚C.
POTENTIAL MARKETS OF COMMERCIAL TE MODULES There are many companies of TEG manufacturer. Some of them can be listed with their high power module: Company NameEfficiency(%)Power Marlow Industries Inc., USA 230309.565.032-7.95 Thermonamic Electronics (Jiangxi) Corp., Ltd,China 250-3003014.4- Hi-Z Technology, USA 250-40050204.9820 Tellurex, USA250-320508.6-14.1
PRIOR STOVE RESEARCHES SUMMARY AuthorsType of cooling Type of module No. of modules Power/module J.C Bass,Killander 1966Forced air cooling Seebeck 2 4.76 V stepped up to 13.5V Nuwayhid 2003 Natural air coolingPeltier 1 1W Nuwayhid 2005 Natural air cooling Seebeck 4 4.2W Lertsatitthanakorn 2007 Natural air coolingSeebeck 1 2.4W Mastbergen 2007 Forced air cooling(1W) Seebeck 1 +4 W Biolite 2009 Forced air cooling(1W) Seebeck 2 +2W Champier “TEGBioS” 2009 Water coolingSeebeck 2 5W Champier “TEGBioSII” 2009 Water coolingSeebeck 4 9.5W 7.5W regulated Rinalde 2010 Forced air coolingSeebeck 2 10W RTI TECA 2010 Forced air cooling(1W) SeebeckNM 1 W
BENCHMARK TESTING Temperature regulation nobe Power supply Heat Plate Cold sink Cooking pot TEG Battery Glasswool is omitted for simplicity
HZ-9 module is selected for this operation due to high temperature tolerance, low cost of 20$ per module when taken in bulk of 10K. Cost of electronics and hot/cold sink of $ 20 Cost of the cookstove will be not more than $48/ 3000INR PROTOTYPE TESTING
COMPARISON OF PELTIER MODULES (TEC) WORKING AS SEEBECK GENERATOR (TEG) ModulesPower(W)Cost($)/module Peltier module 150551.50.512 HZ-142001000.7345 HZ-92001002.8380 ** Factor of pressure between the hot and cold side of the modules should be maintained.
VOLTAGE BOOST The voltage that is generated is not sufficient for powering mobile charging or lighting a torch. A DC-DC boost converter is connected to boost the input voltage from 0.9 V to output stable voltage of 5 V. Work on ultra low power input voltage of 40mV and output stable voltage of 5 V DC-DC converter is still on progress.
Fig: 1. HZ-9 (cold side), 2. ceramic wafers, 3. benchmark testing with TERI mud stove with fan running by TEG, 4. cold sink type, 5. Hot side heat collecting plate + TEG mounted for bench mark testing. 6. LED glowing by TEG+DC-DC converter,
ROAD MAP 1.Appropriate TEG has been selected for operation. 2.Hot side heat collecting plate have been designed. 3.Cold side sink modeling is yet to be done. 4.Bench mark testing of TEG and running different appliances with TEG + battery + DC-DC converter on testing phase. 5.Forced draft Stove designing is in progress. 6.TEG is yet to be placed on the stove with proper temperature determination of the stove. 7.Our Goal is to develop a fully self sustaining forced draft cook stove and running a light/mobile. Prototype ready in 3 months
ILLUMINATING PROSPECTIVE RURAL HOME BY COOKSTOVE USING TEG
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