지열 히트펌프 시스템의 순환펌프 변유량 제어 방안 개발

The purpose of this study was to propose variable flow rate control method of the circulation pump by geothermal water temperature difference in geothermal heat pump system. Generally, the geothermal heat pump system operates in partial load condition, but circulation pump operates at constant speed and supplies constant flow rate. Because of constant flow rate control method of circulation pump, energy was wasted and efficiency reduced. Therefore, this study examined the operation of the current problems of geothermal heat pump system and proposes the variable water flow rate control method of the circulation pump to improve the efficiency of the geothermal heat pump system and to save energy during cooling operation. As a result, the total energy consumption was reduced compared to existing flow rate control method and the energy consumption of circulation pump system was reduced.