蒸发冷却设备飘水率测量方法的实验研究及精确度对比  

Experimental Study and Precision Comparison of Different Drift Loss Measurement Methods for Evaporative Cooling Equipment

作　　者：章立新[1] 卓静 高明[1] 何仁兔 沈艳 

机构地区：[1]上海理工大学能源与动力工程学院,上海市动力工程多相流动与传热重点实验室,上海200093 [2]浙江金菱制冷工程有限公司,浙江诸暨311802 [3]上海同驰换热设备科技有限公司,上海200433

出　　处：《动力工程学报》2018年第2期132-137,共6页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(51506127);广东省产学研资助项目(20168090918085)

摘　　要：采用高效收水槽法研究了蒸发冷却设备出风口飘水的周向不均匀性,基于单层滤纸法存在的缺陷,设计了一种三层扇形滤纸装置,通过实验比较了高效收水槽法、单层滤纸法和三层扇形滤纸法3种测试方法的飘水率.结果表明:增加周向测试位置甚至以风筒中心线为轴采用连续旋转的测试方法,有助于提高测量的精确度;三层扇形滤纸法有效消除了湿汽增重和二次飘水量;飘水主要集中在沿出风口径向0.71R^0.75R内.The circumferential unevenness at air outlet of evaporative cooling equipment was studied with an efficient water collection trough. To overcome the deficiency of single-layer filter paper method, a three-layer fan-shaped filter paper method was proposed, and subsequently experimental tests were con- ducted respectively by the method of efficient water collection trough, single-layer filter paper and three- layer fan-shaped filter paper, following which, their measurement precisions were compared. Results show that the precision of drifting measurement can be improved by adding circumferential testing points, or e- ven by continuous rotation along the fan centerline. Three-layer fan-shaped filer paper helps to reduce the absorption weight and secondary drift loss. The drift loss mainly concentrates in the direction along the outlet radius from 0.71R to 0.75R.

关 键 词：蒸发冷却设备 飘水率 高效收水槽法 单层滤纸法 三层扇形滤纸法 

分 类 号：TK2[动力工程及工程热物理—动力机械及工程]