Parametric analysis and optimization of a ground source heat pump with economizer

Ground source heat pump due to high coefficient of performance (COP) and use of low temperature thermal energy source, is one of the best technologies to use renewable energy resources. In this research at first a geothermal heat pump for heating with economizer was simulated, then the effect of variation of different parameter such as pressure in different parts of cycle, superheating at evaporator outlet, subcooling at condenser outlet and soil temperature on heat pump and total COP and exergy efficiency were analyzed. at the end, Ground source heat pump system was optimized in two manners: total COP is objective function and total exergy efficiency is objective function. In this research total COP and exergy efficiency values for the basic input mode were 3.674 and 0.488 respectively that these values were increased to 5.323 and 0.72 after the optimization..a b c d e f g k l m n o