化工学报 ›› 2012, Vol. 63 ›› Issue (1): 59-63.DOI: 10.3969/j.issn.0438-1157.2012.01.008

• 流体力学与传递现象 • 上一篇    下一篇

毛细吸液芯冷却顶板流动阻力及制冷特性

胡鹏,童明伟,陈才,于佳佳,王茜,孙亚辉   

  1. 重庆大学低品位能源利用技术及系统教育部重点实验室
  • 收稿日期:2011-04-20 修回日期:2011-05-31 出版日期:2012-01-05 发布日期:2012-01-05
  • 通讯作者: 胡鹏

Resistance and cooling performance of ceiling cooling panel of capillary porosity wick

HU Peng,TONG Mingwei,CHEN Cai,YU Jiajia,WANG Xi,SUN Yahui   

  1. Key Laboratory of Low-grade Energy Utilization Technologies and Systems,Ministry of Education,Chongqing University
  • Received:2011-04-20 Revised:2011-05-31 Online:2012-01-05 Published:2012-01-05

摘要: 基于现有空调系统耗能高,舒适性不够均匀,提出了多孔介质柠檬酸钾-石膏配制而成的毛细吸液芯辐射-冷却顶板,在用水作冷却介质时毛细吸液芯辐射-冷却顶板就成了一块内含多孔介质的均布流道。对以多孔介质孔隙率为55.3%的毛细吸液芯为例,水作为载冷剂流过毛细吸液芯冷却顶板进行了实验研究。介绍了毛细吸液芯冷却顶板的结构和内部配置,并通过搭建实验模型在维持室内温度(26±1)℃分布的情况下对其换热量进行了测试,分析了不同流量条件下流量与阻力的关系。结果表明,在冷水进口温度为10~16℃的条件下,相比常规蛇形辐射管,制冷量提高了36.6%~57.7%,当水流量从4 L·h-1变化到28 L·h-1时,黏性力减弱,摩擦因子逐渐减小,渗透率逐渐增大,但当流量从28 L·h-1变化到40 L·h-1时,渗透率开始减小。

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关键词: 冷却顶板, 多孔介质, 流量, 制冷量, 渗透率

Abstract: Since conventional air-conditioning consumes more energy and the temperature in a room is non-uniform,a new ceiling cooling panel of capillary porosity wick(CCPCPW),which is configured by porous media of potassium citrate-gypsum,is used when water is the cooling medium.The CCPCPW with porosity of 55.3% was studied experimentally.The structure and different configurations of CCPCPW were presented and the cooling performance was tested when maintaining the indoor temperature distribution at (26±1)℃,and the relationship of flow rate and resistance was analyzed.The results show that the cooling capacity of the CCPCPW is increased by 36.6%—57.7% when the inlet temperature of cooling water is 10—16℃.The viscous force and friction factor gradually decrease and the permeability increases when the flow rate of cooling water is within 4—28 L·h-1,but the permeability is decreased when the flow rate is within 28—40 L·h-1,which indicates that the local resistance of curve part of pore channel is increased because of higher flow velocity.

Key words: ceiling cooling panel, porous medium, flow rate, cooling capacity, permeability

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