20 September 2011

ECONOMIC COMPARISON BETWEEN GROUND SOURCE HEAT PUMP AND AIR SOURE HEAT PUMP


This paper does the study on thermomechanical analysis of ground source heat pump (GSHP) and air source heat pump (ASHP). The result that the energy utilization rate of
GSHP is above ASHP is obtained. The marketing researches of GSHP and ASHP units have been studied. EER and COP of ASHP in the same company have the little change with the
changing cooling or heating capacity and they vary only with the ambient temperature. But the statistic of GSHP shows that EER and COP are increased with the rising cooling or heating
capacity when the cooling and heating capacity is less than 1000 kW and they will not change when the cooling and heating capacity is greater than 1000 kW. The economic comparison
between GSHP system and ASHP system is analyzed in Tianjin in China. The conclusions that when the cooling capacity is less than 46 kW, the ASHP system is economical, while the GSHP system is economical when the cooling capacity is greater than 46 kW are reached.