部分负荷下校园建筑地源热泵系统运行性能分析

Operation Performance Analysis of Ground Source Heat Pump System in Campus Building under Partial Load

本文基于上海地区某高校建筑地源热泵系统在典型制冷季的实测数据,分析了地源热泵机组在部分负荷率工况下的运行性能。结果表明:定频地源热泵机组具有制冷性能与负荷率呈正线性相关的运行特性,由于暑期部分师生离校,该地源热泵系统在典型制冷季的负荷率较低,不处于最佳运行状态,因此在校园建筑空调系统机组选型时应考虑到因假期导致负荷率下降而机组性能下降的特殊情况,单台机组不应选型过大。风机盘管的高风速模式时长占比不应超过60%,风机盘管开启数量和用户侧流量呈正相关,为避免出现“大流量小温差”的运行问题,运维人员还应根据末端的开启数量调整水泵频率。

Based on the measured data of the ground source heat pump system in a college building in Shanghai in typical cooling season,this paper analyzes the operation performance of the ground source heat pump unit under partial load rate.The results show that:Fixed frequency ground source heat pump units has the cooling performance and the rate of positive linear correlation between features,because some teachers and students from the summer school,the area source heat pump system in a typical refrigeration season of low load rate,not in the best running state,so should be considered while selecting a campus building air conditioning system unit to unit performance degradation due to holiday led to the decrease of the load rate of special circumstances,Single unit should not be too large?The proportion of the duration of the high wind speed mode of the fan coil should not exceed 60%.The number of fan-coil units opened is positively correlated with the flow rate at the user’s side.To avoid the operation problem of"large flow rate and small temperature difference",operation and maintenance personnel should adjust the pump frequency according to the number of terminals opened.