Study on heat transfer in economizer applied for industrial boilers

Abstract

Boiler economizer with the heat exchanger of finned-tube type must be designed compatibly with the whole boiler system. For this reason, calculation of the economizer by using common formulas might lead to an unexpected error. Experimental research has been made to verify some specific parameters of heat transfer taking place in the equipment, such as temperature changes of the exhaust gas and feed water, overall heat-transfer coefficient, amount of transferred heat, and total aerodynamic loss on the gas side. Those figures have been determined for different boiler’s operating conditions. Possibilities for applying results of the research in the field of oil-fired industrial boilers are discussed.