COMPARATIVE ANALYSIS OF EXERGETIC LOSSES IN HEAT RECOVERIES OF GLASS FURNACES

Abstract

The paper presents the results of a comparative analysis of the exergy losses of heat recovery units of various types included in the waste gas heat recovery systems of glass melting furnaces. Based on the principles of universality and additivity of exergy characteristics, as well as design features of heat recoveries, a comprehensive methodology for studying exergy losses in heat recoveries has been developed. With the help of the developed technique, exergy losses in hot water and hot air heat recoveries, as well as in individual heat exchanger modules, were calculated. A comparative analysis of exergy losses and technological features of heat recovery units included in various schemes for the utilization of waste gases from glass melting furnaces has been carried out. For water-heating heat recoveries, the value of energy losses is less than the value of losses for air-heating heat recoveries. When using water-heating heat recovery units in heat recovery schemes, the coefficient of heat using of the furnace fuel increases, on average, by 20%. Despite the higher level of exergy losses in hot air heat recoveries, taking into account a number of important technological factors determined their competitiveness in heat recovery technologies of glass melting furnaces. At the same time, the heat utilization factor of the furnace fuel increases, on average, by 12.5%.