Up-Scaling Heat Recovery Unit (HRU) For Fuel Saving and Process Improvement: A Case Study of Silk Reeling Ovens in Karnataka
Journal Title: IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) - Year 2018, Vol 15, Issue 4
Abstract
Silk reelers in Sidlaghatta taluk, Chikkaballapur District in Karnataka state use traditional ovens called as Italian based ovens (IBO) for cocoon cooking. Solid lengthy pieces of wood are used as a fuel in the oven for heating water in which cocoons are cooked to release the silk thread ends. The oven consists of a simple firebox with a chimney, which operates at a low efficiency of 12-15%. A large amount of heat generated is wasted in the form of hot flue gases, which escape through the chimney. The temperature in the flue gases is above 300 OC, thus a lot of heat dissipates from the chimney creating a hot and uncomfortable work environment. Due to the low efficiency of the oven, more wood is consumed and cooking takes a lot more time. As a solution to the problem, a simple system called Heat Recovery Unit (HRU) was designed and retrofitted to the IBO to recover the waste heat from the chimney to pre-heat the water and the same pre-heated water can be used for cooking cocoon in the oven. This in turn increases the efficiency of the oven, reduces operational time and improves the comfort level of workers as less heat is dissipated from the chimney. This system created considerable interest among the end users, and hence a agency was identified and provided with a prototype for commercialization. Using policy support and introducing subsidies more than 400 units were disseminated in the Sidlaghtatta silk reeling cluster.
Authors and Affiliations
Yabbati Nagaraju, Dr Lasya Gopal
Keywords
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- EP ID EP438393
- DOI 10.9790/1684-1504010611.
- Views 37
- Downloads 0
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