Research on the Performance of an Absorption-Compression Heat Pump for Recovering Heat from Fusel Flue Gas
In this study,a fusel fired hot water boiler was designed to process this poisonous by-product of coal chemical industry.Additionally,the boiler employs a novel hybrid absorption-compression heat pump to recover the waste heat from flue gas.The heat pump's performance for waste heat recover is sim-ulated by using Aspen Plus software.The findings reveal that the flue gas from fusel combustion contains a significant amount of latent heat.The newly designed heat pump effectively recovers waste heat,resul-ting in an 11.01%enhancement in the boiler thermal efficiency under rated working conditions.Further-more,this study conducted an in-depth exploration of how the heat pump's performance is influenced by the compressor pressure ratio,return water temperature,and boiler load.In addition,two performance coefficients,which is respectively based on the principles of energy conservation(COPa)and carbon e-mission reduction(COPe),were introduced to provide a comprehensive analysis of the heat pump's oper-ational efficiency.The results indicated that the heat pump achieves its highest COPa and COPe values at a pressure ratio of 9.6.The heat pump's performance is more sensitive to return water temperature when the pressure ratio falls below 9.6.An increase in boiler load leads to an initial rise and subsequent de-cline in the COPa and COPe of the heat pump.This paper contributes a theoretical foundation for the comprehensive recovery of waste heat from high-moisture flue gas and the utilization of an innovative composite heat pump.
coal chemical fuselwaste heat recoveryfusel boileran absorption-compression heat pumpCOP
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