New approach to evaluate the seasonal performance of building integrated geothermal heat pump system

This paper is to introduce a dynamic simulation method and a total monitoring method and a new hybrid method combining the simulation and the monitoring to evaluate the building integrated geothermal heat pump (BIGHP) system seasonal performance factor (SPF). SPF is sometimes defined as CSPF(Cooling Seasonal Performance Factor) and HSPF(Heating Season Performance Factor). CSPF is equivalent to COPcs while HSPF is to COPhs in practice. However, the single point based COPc and COPh could not express the annual performance of BIGHP system properly due to the characteristics of the system partial load operation. Therefore, a specially proposed new method with twelve data points indicating twelve months per year from the climate weather data has been proposed to predict the CSPF and HSPF and finally annual performance factor (APF).