风机盘管变流量工况换热特性测试与分析*
Test and analysis of heat transfer characteristics of fan-coil units under variable flow conditions
摘要：
为夯实大型公共建筑集中式空调冷水系统末端设备控制的研究基础，依据GB/T 19232—2003《风机盘管机组》相关规定，在进风干球温度27 ℃、湿球温度19.5 ℃，供水温度7 ℃的标准试验条件下，采用连续调节的方式对风机盘管机组样机变流量试验工况下的流动特性和换热特性进行了测试。通过分析被测样机在相对流量0~160%区间的11个点的测试数据，建立了其相对供冷量与相对流量之间的定量关系，并与三次多项式拟合结果、解析解表达式进行了比较。分析了风机盘管机组的结构特征、进口空气状态、冷水流动特性及析湿系数对机组换热特性的影响。
Abstract：
In order to consolidate the research foundation for the control of the terminal equipment of the central air conditioning chilled water system in large public buildings, according to the relevant provisions of GB/T 19232-2003 Fan-coil unit, under the standard test condition of inlet air dry-bulb temperature of 27 ℃, wet-bulb temperature of 19.5 ℃ and water supply temperature of 7 ℃, tests the flow characteristics and heat transfer characteristics of a fan-coil unit prototype under variable flow test conditions by means of continuous adjustment. Establishes the quantitative relationship between the relative cooling capacity and the relative flow rate based on the test data of 11 points with the relative flow rate varying from 0 to 160%, and compares with the fitting result of cubic polynomial and the expression of analytical solution. Analyses the influence of structure characteristics, inlet air states, chilled water flow characteristics and moisture separation coefficient on the heat transfer characteristics of fan-coil units.
Keywords:fan-coil unit, standard test condition, static characteristic, heat transfer characteristic, flow characteristic