上海某办公楼地埋管地源热泵系统夏季运行性能分析
Analysis on operating performance of the ground-coupled heat pump system in summer for an office building in Shanghai
摘要：
通过对上海市某办公楼地埋管地源热泵系统夏季工况的持续监测，研究了该系统的夏季运行特性。结果表明：夏季工况时，该系统在40%负荷率运行时间最长，约占整个夏季工况的22.8%；机组性能系数为3.2~8.4，系统性能系数为0.9~5.2；机组性能系数水平为6（即5.5~6.5）的时间最长，约占整个夏季工况的55.6%；系统能效比水平为4（即3.5~4.5）的时间最长，约占53.4%。此外，通过对监测数据的分析与数学计算得到了描述夏季工况机组性能系数的多元非线性回归模型，相关系数平方值R2为0.883，该模型可用于同类型地埋管地源热泵系统的性能系数预测。基于回归模型，分析了按照建筑负荷需求设置用户侧出水温度，能较大程度降低机组的耗电量，为地埋管地源热泵系统的设计和运行提供参考。
Abstract：
Based on the on-site monitoring in summer condition, analyses the operating performance of the ground-coupled heat pump system for an office building in Shanghai. The result shows that the most of running time in summer is at 40% of part load ratio (PLR), accounting for about 22.8% of the summer-time. The unit coefficient of performance (COP) is between 3.2 and 8.4, while the system COP varies from 0.9 to 5.2. Furthermore, the value of unit COP is mostly at 6, accounting for about 55.6% of the summer-time, while that of the system COP is mostly at 4, about 53.4% of the summer-time. Develops a multi-variation nonlinear regression model for the unit COP based on the monitoring data, whose R2 is 0.883, revealing that the regression model is good enough to predict the energy performance ratio for the similar heat pump system in summer condition. Based on the regression model, the unit power consumption will be largely reduced if the temperature of the user-side supply water is set according to the demand of building load, which can provide support for the future design and operation of ground-coupled heat pump systems.
Keywords:office building, ground-coupled heat pump system, operation performance, coefficient of performance, part load ratio, nonlinear regression