Improved smokeless biomass cook stove for residential schools & community

cooking

ByS.Khuntia

Ex-Chief Scientist of CSIR, Govt of IndiaBhubaneswar, India

Inventor: Various Improved cook stoves & Rural technologiesMember of Core committee of MNRE-GOI on Biomass cook stove pgm.

E.mail: khuntias@gmail.comMob: 09437012679

March 2013

Residential school in Bhubaneswar, Odisha, India : 350 SC & ST students

Traditional Cook Stove in school

• U – Type brick stove (chulha) without grate.• Fuel: Firewood.• Pot size : 36 to 24 inch diameter, flat bottom.• Present cooking for: 300-400 children• Food preparation: Rice, dal & vegetable, two times.• Cooking period: 120 to 135 minutes (depending upon

items)• Smoke & shoot: excessive• Room temperature: High (intolerable)• Exhaust of gas & smoke from kitchen: Through door &

window

Traditional cook stove & kitchen

Black shoot coating inside the

kitchen due to excessive smoke

Improved smokeless cook stoveInstalled in Ashram school:

Designed by : S.Khuntia, Ex-Chief Scientist of CSIR (during December 2012)

Installed by : M/S Modern Pottery Industry, Bhubaneswar at Ashram School, Nayapalli, Bhubaneswar, SC & ST Dept. Govt of Odisha

Sponsored by : District Collector, Khurdha through its District Welfare officer

Period of Installation: December 2012

KHUNTIA – IMPROVED COMMUNITY FIXED CHULHA WITH CHIMNEY

Chimney outside of kitchen

Cooking by KHUNTIA- Smokeless stove)

Inside hearth and top plate to accommodate small size pots

Performance study of KHUNTIA stove: Comparasion with Traditional stove

Sl. Parameter Traditional stove KHUNTIA- Cook Stove

1. Construction Red Brick & clay Red brick, cement sand mortar & steel chimney

2. Cooking capacity 300 – 400 children 300 – 400 children

3. Firewood consumption 105 kg/day 75 kg/day

4. Fuel saving over traditional

- 29% at present(Designed for 30%)

5. Cooking period 120 – 135 minutes 85 – 100 minutes

6. Smoke Excessive & burning eye Almost Nil

7. Room temperature Quite high (intolerable) Normal as outside

9. Tentative life 5 – 10 years More than 10 years

9. Cost About Rs. 2000/- About Rs.10,000/-

10. Recovery of cost Within two months

Other Improved cook stoves invented by S.Khuntia & utilized in NPIC of MNRE, Govt.

of India during 1998 to 2003

• “Harsha” multifuel portable stoves ( Family & Community)

• Fixed chulhas with chimney (SK-1, SK-2, SK-3, SK-4, SK-Agni, SK-Delux etc)

• All stoves propagated by OREDA, Govt. of Odisha under NPIC during 1990 to 2003 in Odisha.

• More than 3.0 million units of above design cook stoves disseminated in different parts of India.

• OREDA had disseminated more than 1.5 million units of above stoves in Odisha.

‘Harsha’ Multi-fuel stove family size

‘Harsha’ Multi-fuel Community stove ‘Delux’Multi-fuel community fixed stove

‘SK-Deluxe’ Multi-Fuel fixed Chulha (family size)

‘Jyostna’ Multi-fuel stove

Performance of Multi-fuel stoves

ModelMaterials for construction

Present cost(Rs)

Thermal efficiency (%)

CO/CO2TSP(Mg/M3)

Cooking capacity (person)

As per BIS -- -- > 25% < 0.04 < 2mg/M3 --

Portable StovesHarsha

Mild steel (MS)

600 30-43 0.007 1.8 8

Jyostna MS 550 30-42 0.0075 1.82 8

Harsha (community) MS 4000 30-51 0.0055 1.71 50-400

Fixed StovesSK-Delux

MS and clay 250 28-40 0.0065 1.75 8

SK-Delux (community) MS and clay 1250 30-42 0.0055 1.70 50-400

NOTE : Exhaust gas drawn from a hood, 350 mm from top of stove (with dilution)

Pottery-lined fixed chulhas with chimney ‘SK-3’ Single pot stove with chimney

‘SK-1’ double pot stove with chimney

‘SK-3’ Pottery-lined fixed chulha with chimney

(Nearly 2.5 million stoves sold in India)

‘SK-Agni’ Fixed Chulha (Without chimney)

Thanking you