亚湿球温度的冷水对农业温室湿帘降温性能的影响分析.pdfVIP

第35卷第1期 制 冷 技 术 Vol.35, No.1 2015年2月 Chinese Journal of Refrigeration Technology Feb. 2015 doi：10.3969/j.issn.2095-4468.2015.01.107 亚湿球温度的冷水对农业温室湿帘降温性能的影响分析  张璐瑶 ，黄翔，宋祥龙，李鑫 （西安工程大学环境与化学工程学院，陕西西安 710048 ） [摘 要] 本文通过数学建模，对亚湿球温度的冷水对湿帘降温效果的影响进行理论分析。对陕西省富平 县一栋采用湿帘-风机降温系统的温室湿帘的降温效果进行了测试。结果表明，当循环水平均温度比室外 空气湿球平均温度低 3.4 ℃时，湿帘蒸发冷却效率为 92.37%，湿帘出风温度比室外湿球温度低 0.6 ℃。利 用亚湿球温度的冷水作为直接蒸发冷却系统的循环水，能够进一步降低出风干球温度，提高湿帘直接蒸发 冷却效率。 [关键词] 亚湿球温度；直接蒸发冷却；数学建模；现代农业温室 Influence of Water of Sub-wet Bulb Temperature on Cooling Effect of Wet Curtain in Agricultural Greenhouse * ZHANG Lu-yao , HUANG Xiang, SONG Xiang-long, LI Xin (School of Environment and Chemical Engineering, Xian Polytechnic University, Xian 710048, China) [Abstract] Through the establishment of mathematical modeling, the influence of the cooled water with sub-wet bulb temperature on the cooling effect of wetted pad was analyzed theoretically. The cooling effect of wetted pad for a greenhouse equipped with the wetted pad and fan cooling system in Fuping city of Xian Province was tested. The result shows that, when the average temperature of the circulating water is 3.4 ℃ lower than the average outdoor air wet bulb temperature, the evaporative cooling efficiency of the wetted pad is 92.37%, and the outlet air temperature of the wetted pad is 0.6 ℃ lower than the outdoor wet bulb temperature. The application of water with sub-wet bulb temperature as the circulating water for direct evaporative cooling system can further reduce the dry bulb temperature of outlet air, and improve the direct evaporative cooling efficiency of the wetted pad. [Keywords] Sub-wet bulb temperature; Direct e