地表水源热泵系统冷热源利用的节能评价

分析了地表水源热泵系统的冷却水温度、流量和扬程等因素对水源热泵系统能效比的影响.以空调冷负荷和冷冻水参数作为控制目标,提出了包含水源热泵机组能耗的冷却水系统能效比分析模型.利用该模型分析了地表水直接进入热泵机组的地表水源热泵系统和以板式换热器间接换热的地表水源热泵系统的运行能效.结果显示,冷却水温度变化对能效比的影响大于冷却水系统静扬程变化对能效比的影响.部分负荷工况下冷却水温度为23~24℃时系统能效比达到最大值.

Energy Evaluation of Heating and Cooling Source Use for Surface Water Source Heat Pump System

The impacts of temperature, flow and lift of cooling water on the energy efficiency ratio of surface water source heat pump system were analyzed. The cooling load of air condition and parameters of cold water were set as control objectives, and the analytical model of energy efficiency ratio of cooling water system including energy consumption of water source heat pump was proposed. The running energy efficiency ratios of two types of surface water source heat pump systems (direct heat transfer of surface water flowing into chilling water unit directly, and indirect heat transfer through plate heat exchanger) were analyzed by using this model. The results show that the impact of change of cooling water temperature on energy efficiency ratio is bigger than change of lift of cooling water system. In partial load condition, the energy efficiency ratio of chilling water unit and cooling water system reaches the maximum when the temperature of cooling water is 23~24°C.