微通道换热器在热管/蒸气压缩复合空调机组中的应用

Application of micro-channel heat exchanger to heat pipe/vapor compression combined air-conditoning unit

热管与蒸气压缩复合空调机组是适用于基站等高发热空间的全年制冷解决方案,在能效、成本和运行维护方面均具有良好的优势。但是复合空调机组换热器尺寸比传统基站空调尺寸大很多,造成整机产品体积大、质量大,在移动通信基站的商业化应用中受到制约。为此,本文提出基于微通道换热器在热管/蒸气压缩复合空调机组中应用的技术方案,与采用铜管铝翅片换热器的热管/蒸气压缩复合空调机组进行试验对比分析。试验结果表明,采用微通道换热器技术,室内机宽度和高度分别减小16%和17%,质量减小22%,室外机宽度和高度分别减小21%和24%,质量减小28%。整机能效比在蒸气压缩制冷工况下提高6.4%,在热管制冷工况下提高4.7%。同时该技术方案较好解决微通道蒸发器翅片冷凝水排水不畅、蒸发器制冷剂分配不均等技术问题。

The heat pipe/vapor compression combined air-conditoning unit is a set of refrigeration solution throughout the year applied in high fever space as base stations, with the advantages at the aspects of EER, cost, operation and maintenance. But the size of heat exchanger of the combined air-conditoning unit must be much larger than that of traditional base station air-conditoning unit, which restricts its application in base station of the mobile communication field because of the equipment＇s big volume and heavy weight. So the technical solution applying micro-channel heat exchanger to heat pipe/vapor compression combined air-conditoning unit is presented, and it is compared with the combined air-conditoning unit with copper finned tube heat exchanger through experiment. The experimental results show that the indoor unit＇s width and height are reduced by 16% and 17% respectively, and the weight is reduced by 22%; the outdoor unit＇s width and height are reduced by 21% and 24% respectively, and the weight is reduced by 28G. The EER of this equipment are increased by 6.4 % and 4.7% respectively under the condi- tions of vapor compression refrigeration and heat pipe refrigeration. This technical solution can solve the issues such as poor condensate drain of micro-channel exchanger and uneven refrigerant distribution of the evaporator.