• MUPPIDI PADMA
• Prof P.SRINIVAS KISHORE
• k.sudhakar
• G.PRASAD

Industrial waste heat refers to energy that is generated in industrial process without being put to practical use. It is estimated that somewhere between 20 to 50% industrial energy input is lost as waste heat in the form of hot exhaust gases, cooling water, heat lost from hot equipment surface and heated products. While some waste heat losses from industrial processes are inevitable. Facilities can reduce these losses by improving equipment efficiency or installing waste heat recovery technologies. In the steel making process, Rolling mills play a vital role in transforming the steel to finished Products. Rolling mills at Visakhapatnam Steel Plant consists of Light and medium merchant mill (LMMM), Wire Rod Mills (WRM) and Medium Merchant Structural Mills (MMSM). Air Recuperator is present in Medium Merchant Structural Mills (MMSM) section of the plant for the purpose of waste heat recovery. In this Medium Merchant Structural Mills (MMSM) section, air is pre-heated using the flue gas which enters the recuperator at high temperature from furnace. The pre-heated air is used in the furnace for heating the blooms. Volume flow rates and temperature of both flue gas and air are taken as input data. Heat transfer coefficient, friction factor and pressure drop on both air side and flue gas are estimated effectiveness of air recuperator is calculated. Graphs are drawn to show the performance of air recuperator the data arrived from the calculations with varying flow rates of air and flue gas are consolidated as table and put in appendix.

"EVALUATION OF HEAT TRANSFER ON AIR RECUPERATOR", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 9, page no.713-721, September-2018, Available :http://www.jetir.org/papers/JETIR1809137.pdf

"EVALUATION OF HEAT TRANSFER ON AIR RECUPERATOR", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 9, page no. pp713-721, September-2018, Available at : http://www.jetir.org/papers/JETIR1809137.pdf