Heat recovery system for oven in paint shop

This paper presents the design of heat recovery system for oven in paint shop. The hot air generated in oven is directly passed to the environment through the exhaust. Oven's unused heat is exhausted to atmosphere at High Temperature. The exhausted heat carrying flue gas is at high temperature. The system is to reuse that air for hot water generation. The hot water generated will be at temperature of boiling point approximately. That water then can be used for several processes. Heat energy for total hot water heating is very large. Hence the potential of energy recovery & reuse is realized. Average 90% of energy can be recovered from oven exhaust. The technique used is heat exchanger with gas to liquid heat transfer.