毛细管重力循环柜夏季制冷除湿性能实验研究
Experimental study on refrigeration and dehumidification performance of capillary gravity circulation cabinets in summer
摘要：
为确定毛细管重力循环柜(简称重力柜)制冷出力的影响因素及除湿性能,选择上海松江地区作为典型高湿地区,搭建了重力柜实验平台。实测研究了室内负荷、供水温度、供水流量及辐射板有无保温等因素对重力柜制冷除湿性能及室内温湿度的影响,并得到其夏季供冷量的拟合公式。实验结果表明:在夏季,重力柜制冷除湿性能可以较好地满足房间要求;当房间负荷为1 300 W时,重力柜的总供冷量无保温时为1 400～2 100 W,加保温时为1 500～2 300 W,当房间负荷为1 500 W时,无保温时的供冷量增加至1 600～2 300 W,加保温时为1 750～2 600 W;供冷能力会随着供水温度降低、供水流量和房间负荷增大、外辐射板添加保温而增强;重力柜辐射供冷量占比很小,无保温时为3.0%～4.5%,加保温后减小至0.5%～1.0%;夏季室内温度范围为24～25 ℃,相对湿度范围为45%～50%,常规工况下重力柜的除湿量为400～1 000 g/h。
Abstract：
In order to determine the influence factors of cooling capacity and the dehumidification performance of the capillary gravity circulation cabinet (gravity cabinet), the Songjiang area of Shanghai is selected as a representative high-humidity area to build a test platform of the gravity cabinet. The effects of indoor load, water supply temperature, water supply flow rate and radiation plate insulation on the refrigeration and dehumidification performance of gravity cabinet and indoor temperature and humidity are studied through the experimental test, and the cooling capacity fitting formula in summer is obtained. The test results show that the refrigeration and dehumidification performance of the gravity cabinet can better meet the requirements of the room in summer. When the room load is 1 300 W, the total cooling capacity of the gravity cabinet is 1 400-2 100 W without insulation and 1 500-2 300 W with insulation. When the room load is 1 500 W, the cooling capacity increases to 1 600-2 300 W without insulation and 1 750-2 600 W with insulation. The cooling capacity will be enhanced with the decrease of water supply temperature, the increase of water supply flow rate and room load, and the addition of thermal insulation to external radiant panels. The radiation cooling capacity of the gravity cabinet accounts for a small proportion, which is 3.0%-4.5% without insulation and reduces to 0.5%-1.0% with insulation. In summer, the indoor temperature range is 24-25 ℃, the relative humidity range is 45%-50%, and the dehumidification performance of the gravity cabinet ranges from 400 to 1 000 g/h under normal working conditions.
Keywords:capillary; gravity circulation cabinet; refrigeration; dehumidification; cooling capacity; water supply temperature; water supply flow rate; radiation plate insulation