多联机性能测试室温度场影响因素的实验研究  

Experimental Study on the Influence Factors of Temperature Field in VRF Performance Test Room

作　　者：王可[1] 柳建华 张良 张雨薇[1] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海市动力工程多相流动与传热重点实验室,上海200093

出　　处：《热能动力工程》2017年第3期93-98,共6页Journal of Engineering for Thermal Energy and Power

基　　金：上海市教育委员会重点学科资助项目(150502)

摘　　要：为了研究多联机性能测试室温度场的影响因素及解决其温度场不均匀性的问题,本文通过数值模拟和实验,研究了不同送风方式、不同送风速度和不同送风温度条件下测试室的温度场的温度变化情况。实验采用孔板顶送风、侧回风和四面风道送风、顶回风的送风形式;循环风机的转速设置30、40和50 Hz 3种;低温工况选取干球温度-20℃、,高温工况选取干球温度60℃,常温工况选取干球温度30℃。数值模拟结果与实验结果表明:相同送风温度和送风速度情况下,四面风道送风、顶回风的送风形式测试室温度场的均匀性较孔板顶送风、侧回风的送风方式温度均匀性差;相同送风方式和相同送风温度情况下,增大送风速度,相同位置处的温度随之降低,流场和温度场的分布趋势几乎不变;相同送风方式和相同送风速度情况下,送风温度越高,温度场越均匀。研究结果为多联机性能测试室的设计以及多联机性能的测试提供一定的理论和试验基础。In order to obtain the influence factors of VRF performance test room temperature and solve the problem of uneven temperature field,the temperature variations of the test room with the different air flow patterns,speeds and temperatures were investigated experimentally and modeled numerically. The experiment used two different supply return air forms of A) supplying air on the orifice plate and returning air on side and B) supplying air from surrounding and returning air on top,and circulating fan speeds of 40 Hz,30 Hz and 50 Hz,and dry-bulb temperatures as follows:-20 ℃ for low temperature conditions,60 ℃ high temperature conditions,and 30 ℃ normal temperature conditions. The experimental results showed that the uniformity of the temperature in the test cabinet in the supply return air form A is inferior to that in the supply return air form B under the same supply air temperature and velocity condition. For the same supply air temperature and supply return air form,the temperature field at the same position decreases with the increase of the feed rate,but the distributions of flow field and temperature field almost remain unchanged. Under the circumstances of the same supply air velocity and supply return air form,the higher supply air temperature results in higher uniformity. These results are believed to provide a theoretical and experimental reference for the design of the multi-line performance testing room and the multi-line performance test.

关 键 词：送风温度 送风速度 送风形式 均匀性 温度场 

分 类 号：TU831.4[建筑科学—供热、供燃气、通风及空调工程]