| 摘要: |
| 对于空调器用翅片管换热器，制冷剂在蒸发/冷凝两种工况下的制冷剂侧压降特性差异较大，导致换热器蒸发模式下的最佳分路数远大于冷凝模式下的最佳分路数，而常规翅片管换热器无法实现制冷剂流路与运行工况之间的良好匹配。针对这一问题，本文通过实验研究了气体旁通蒸发技术对不同负荷下房间空调器性能及APF的影响。实验结果表明：制热模式下，当系统制热量为2~5 kW时，气体旁通蒸发系统的COP较原型机可提升2.5%~7.2%；制冷模式下，当系统制热量为1.5~4.5 kW时，气体旁通蒸发系统的COP较原型机提升了8.6%~3.5%；根据GB 21455—2019标准[1], 应用气体旁通蒸发技术可使空调器全年能源消耗效率APF提升6.4%。 |
| 关键词: 房间空调器 APF 翅片管换热器 气体旁通蒸发技术 |
| DOI： |
| Received:July 21, 2020Revised:March 04, 2021 |
| 基金项目: |
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| Improving the APF Index of Inverter Air Conditioner Using Vapor-bypassed Evaporation Technique |
|
Zhang Hao1,2, Hou Zefei2, Li Xingdang2, Fan Chaochao1, Yan Gang1, Chu Wenxiao1, Wang Qiuwang1
|
| (1.School of Energy and Power Engineering, Xi'an Jiaotong University;2.Guangdong Midea Refrigeration Equipment Co., Ltd.) |
| Abstract: |
| For finned-tube heat exchangers, owing to the extremely different refrigerant pressure drop characteristics between evaporation and condensation modes, the optimum refrigerant channel number of the evaporation mode is larger than that of the condensation mode. However, the conventional heat exchanger cannot achieve better matching characteristics between the refrigerant circuit and variations in operating conditions. To solve this problem, a vapor-bypassed evaporation technique is applied in a residential air conditioner, and experimental studies have been conducted to investigate the corresponding system performance under various operating conditions. Experimental results show the following: under heating mode, as the heating capacity ranges 2~5 kW, the vapor-bypassed evaporation system yields 2.5%~7.2% higher COP over baseline; under cooling mode, when the cooling capacity increases from 1.5 kW to 4.5 kW, the COP of vapor-bypassed evaporation system is improved by 8.6%~3.5% in comparison with the baseline; finally, according to the GB 21455—2019 Standard[1], the APF (annual performance factor) of vapor-bypassed evaporation system is improved by 6.4%. |
| Key words: residential air conditioner APF index fined-tube heat exchanger vapor-bypassed evaporation technique |
