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Magazine Editorial

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Category CLUSTER
Title What’s Cooking?
Abstract Honey Bee Network has received a large number of examples for improving wood or kerosene stoves for improving efficiency in cooking.  Some of these have been tested and found to be better while others have not received such a good response.  The purpose of this cluster is to draw attention to the current efforts being undertaken by the innovators to address a persistent problem.  The fact is that there are millions of women who still continue to use archaic low efficiency stove with smoke all around.  We hope that the challenge of developing open source solution for substituting the low efficiency widely prevalent wood stoves will be met in near future. 
Details Portable Energy Efficient Wood Stove V. Jayaprakasan (12th standard) Calicut, Kerala Jayaprakasan has been making wooden stoves for the past 21 years. He was once given a contract to build an incinerator for a local hospital. While inspecting the incinerator, he noticed a sudden spur of flame at the chimney after about ten minutes of operation. The experts explained to him that the flame is a result of the combustion of the carbon particles which, on coming in contact with fresh oxygen (at the top of chimney), undergo complete combustion. This concept, previously unknown to the innovator was incorporated in his new design. A secondary burning chamber has been added to burn the unburnt hydrocarbon coming out with the smoke/exhaust. Due to proper combustion of biomass less smoke is produced. It has been tested by Integrated Rural Technology Centre, Mandur, Palakkad and found to be 37.67% efficient with fire wood and 29.48% with coconut shell fuel. The manufacturing cost is about Rs.1000 for portable stove and Rs.4000-6000 for community stove. The innovator won the Kerala State Energy Conservation Award 2008 for his contributions. Improved Wood Stove C Senthil Kumar (12th Standard) Coimbatore, Tamil Nadu Senthil Kumar thought of this idea while he successfully lit up an extinguished fire with the help of a small wooden piece almost 12 years ago. He introduced the grill above the stove’s floor for better aeration and used insulation bricks to reduce the heat loss. The stove consumes 0.75-1 kg of fuel per hour and the price is Rs 7000-10,000 (single burner 3-20 l), Rs 22000- 25000 (double burner, industrial application). The innovator claims to have sold over 15000 units of different variants. It has been tested by the energy department at IIT Guwahati. Modified Kerosene Stove Ghulam Mohd. Sheikh (8th Standard) Anantnag, Jammu & Kashmir Life has not been easy for Ghulam Mohammed. He could not pursue formal education for lack of adequate money. The idea of making this stove struck to his mind in 2006 as he could not afford a new one. He says “My stove has a unique design, the pipes can act both as kerosene tank and as well as stand, unlike the ones present in the market having separate tank and stand thus increasing their weight”. Compressed air is stored in the upper potions of the pipes with 800ml kerosene capacity. After the stove is lighted for about two minutes, the loop of the tube above the burner gets heated. It is believed that the stove has higher thermal efficiency due to preheating of kerosene and less chances of explosion due to distribution of pressure in large area. Faculty of Mechanical Engineering Department, NIT Srinagar, and Jammu & Kashmir state that it is cost effective, safe, and easy-to-build by local mechanics. They also suggested some improvements in the design of the burner. Portable smokeless stove Ashok Thakur Bihar The stove is fuelled by paddy husk which is considered to be of limted use after the milling of paddy grain. Due to its specific design the combustion of fuel is more efficient and smoke free. One kilogram of paddy husk burns for an hour. The stove weighs four kilograms. The innovator has sold about 50 pieces in different regions of Bihar and UP at the rate of Rs 400 per piece. One chulha can be manufactured within few hours. An Improved Kerosene Stove Late Niranjan Prasad Sharma Uttar Pradesh In this improved stove, preheated kerosene in gaseous state is fed into the burner. The stove consumes 25% less kerosene. It is free from smoke, soot and sound. It also removes the drudgery of cleaning the soot filled cooking vessels. Test results from Indian Institute of Petroleum, Dehradun shows a silent and stable flame. Kerosene consumption rate is 100-108 g/h and thermal efficiency is 40 per cent. Improved Stove Sameerul Hasan Liaquati This stove eliminates the need to pump air and regular cleaning of the pores of the burner. The cost is almost same as that of a conventional stove. Even handicapped people, children & women can operate it with less effort and time. Test results from Indian Institute of Petroleum, Dehradun show kerosene consumption rate at 230 g/h and thermal efficiency of 42%. Kerogas Stove Late Sarfuddin Amanuddin Kazi Maharashtra Preheated kerosene in a gaseous state is used as fuel in this innovation. It is different in construction when compared to other pre-heated kerosene stoves as no soot is produced at the bottom of the vessel. This eliminates blackening of vessels. The cost is around Rs. 1000 and being smokeless, it reduces pollution and various health hazards. Test results from Indian Institute of Petroleum, Dehradun show that it generates a silent and stable flame and a kerosene consumption rate of 240 g/h. The thermal efficiency is 52% and proper heating of kerosene is required for trouble free operation. Multi utility fuel efficient stove S. J. Joe Kerala This stove has high fuel efficiency (14 hrs in a litre as compared to seven hrs for conventional ones). It has a built in water jacket to tap heat loss on sides. This is also smoke-free and safe. Single and multiple burners are available.
Volume No. Honey Bee 22(4) & 23(1) 37-38, 2012