Thermal simulation of gas engine driven heat-source tower heat pump

Abstract

In order to efficiently solve the problem of solution regeneration in the heat-source tower system, the heat-source tower gas engine driven heat pump system (HTGEHP) was established and its thermodynamic principle and cycle characteristics were analyzed. The mathematical models of gas engine system, heat-source tower heat pump system and solution regeneration system were established by combining experimental data and theoretical assumptions, and the coupling relationship between three models is revealed. Effect of outdoor air temperature, outdoor air humidity, condenser inlet temperature, evaporator inlet temperature, gas engine speed on the operation performance of the system was revealed. The heating performance of HTGEHP, air source gas engine driven heat pump (ASGEHP), and air source electric heat hump (ASEHP) was compared. The results indicate that the coefficient of performance and primary energy ratio of the HTGEHP system increase with an increase in outdoor air temperature, outdoor air humidity, evaporator inlet temperature, or a decrease in condenser inlet temperature. The heat production of the HTGEHP system increases, but COP and PER decrease as the gas engine speed increases. Under the conditions of overheat of 2°C, gas engine speed of 1400 rpm, outdoor air temperature of 6°C, condenser inlet temperature of 30°C, the heat production, COP and PER of HTGEHP is 29.4%, 39.6% and 8.97% higher than that of the ASGEHP, respectively. However, the compressor power of the HTGEHP is 7.8% lower than that of the ASGEHP.

Keywords

Heat-source tower mathematical model heating performance gas engine driven heat pump system heat pump

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