377-长笛型分液管开孔方式对微通道房间空调器性能的影响分析.pdfVIP

长笛型分液管开孔方式对微通道房间空调 器性能的影响分析 1 1☆ 1 1 姚喻晨 张忠斌 胡雨 胡昕昊 (1.江苏省能源系统过程转化与减排技术工程实验室，能源与机械工程学院，南 京师范大学，南京 210042) 摘 要：微通道换热器的使用在减少制冷剂充注量的同时，提高换热效率，从而优化制 冷系统结构，节能减碳，在世界各国为控制全球温升而努力的时期显得尤为必要。通过内置 长笛型分液管的微通道换热器替换房间空调器中的翅片管蒸发器作为试验样机，在不同环境 工况下对样机性能进行试验分析，依据试验结果，对长笛型分液管的开孔形式进行改进，再 次进行试验，从而验证不同长笛型分液管结构下试验样机的性能，并通过红外成像的方法验 证气液两相制冷剂在微通道内的分配情况。结果表明，采用非均匀开孔长笛型分液管结构的 微通道蒸发器时试验样机的输入功率、能效比等均高于采用均匀开孔长笛型分液管结构的微 通道蒸发器的情况，此时气液两相状态的制冷剂在微通道内分配情况更好，是造成性能优化 的主要原因。 关键词：微通道房间空调器 长笛型分液管 均匀开孔 非均匀开孔 性能试验 AN ANALYSIS OF THE IMPACT OF FLUTE DISTRIBUTION PIPE OPENING ON PERFORMANCE OF ROOM AIR CONDITIONER WITH MICRO-CHANNEL HEAT EXCHANGER Yao Yuchen1 Zhang Zhongbin1 Hu Yu1 Hu Xinhao1 (1. Engineering Laboratory of Energy System Conversion and Emission Reduction of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210042) Abstract:Micro-channel heat exchanger in room air conditioner can help reduce refrigerant charge and improve heat transfer efficiency, and subsequently helps optimize the structure of refrigeration system, conserve energy and reduce carbon emission. Currently, many countries are making great efforts to limit global mean temperature increase. Therefore, the use of micro- channel heat exchanger deserves more attention. A micro-channel heat exchanger using flute distribution pipe is used as the substitution for traditional finned-tube evaporator in a sample room air conditioner. Experimental investigation on the sample unit performance and different refrigerant distribution in the micro-channels are conducted under different ambient conditions and visualized with infrared thermographs. Based on the experimental results, the opening of the flute distribution pipe in the micro-channel is modifi