土壤源VRF空调系统冬季运行特性实验研究
Experimental Study on Operating Performance of Ground Source Variable Refrigerant Flow System in Winter

以土壤源VRF空调系统为研究对象，利用土壤源VRF实验台对其冬季运行特性进行了实验研究，分析在不同开机率时，小时制热量、小时耗功量、机组COP随部分负荷率的变化规律。结果表明：小时制热量与小时耗功量随开机率的升高基本呈现增大趋势，且耗功量对开机率的变化更为敏感；不论室内机的开启率为何值，小时制热量随部分负荷率的增大而增大，小时耗功量、机组COP随部分负荷率的增加呈现下凹、上凸的变化趋势，即土壤源VRF空调机组在部分负荷运行条件下具有较为良好的节能性。
The operational characteristics of ground source variable refrigerant flow (GSVRF) system in winter was investigated based on the measured data in GSVRF test rig. The variations of hourly heating capacity, hourly system power consumption and coefficient of performance (COP) of unit under different operation rate and part load ratio (PLR) were obtained. The results of the experiments indicate that the hourly heating capacity and hourly system power consumption increased substantially with the growing amount of operation rate, and the amount of hourly system power consumption is more sensitive to changes in the operating rate; regardless of the operation rate, hourly heating capacity increases with the rise of PLR; hourly system power consumption and COP of unit exhibits concave and convex trends with the rise of PLR, which shows that GSVRF system has more favorable energy efficiency at part load operating conditions