空气源热泵过冷蓄能除霜特性试验

上海交通大学学报（自然版） ›› 2012, Vol. 46 ›› Issue (10): 1604-1608.

空气源热泵过冷蓄能除霜特性试验

董建锴1，姜益强1，姚杨1，闫凌2

(1. 哈尔滨工业大学热泵空调技术研究所，哈尔滨 150090；2. 东南大学建筑设计研究院有限公司，南京 210096)

收稿日期:2011-11-07 出版日期:2012-10-30 发布日期:2012-10-30

Experimental Study on Characteristic of Thermal Energy Storage Defrosting for Air Source Heat Pump Using Sub-cooling Energy of Refrigerant

DONG Jian-Kai-1, JIANG Yi-Qiang-1, YAO Yang-1, YAN Ling-2

(1.Institute of Heat Pump and Air Conditioning Technology, Harbin Institute of Technology, Harbin 150090, China； 2. Architectural Design&Research Institute, Southeast University, Nanjing 210096, China)

Received:2011-11-07 Online:2012-10-30 Published:2012-10-30

摘要/Abstract

摘要： 为了解决空气源热泵除霜过程中能量来源不足而导致的各种除霜问题，提出了空气源热泵过冷蓄能除霜方法.对一台额定输入功率为850 W的家用空气源热泵进行改造，在人工模拟环境条件下，与常规逆循环除霜进行了对比试验.试验结果显示：过冷蓄能除霜条件下，压缩机的吸排气压力分别提高了0.11和0.57 MPa，除霜时间和恢复供热时间分别缩短30.8%和25%，除霜过程耗功减少了22.8 kJ.因此，过冷蓄能除霜可以有效地提高压缩机吸排气压力，缩短除霜和恢复供热时间，改善除霜时的室内热舒适性，降低除霜过程能耗.

关键词: 空气源热泵, 过冷热量, 相变材料, 蓄能除霜

Abstract: This study is concerned with a thermal energy storage defrosting (TESD) based on reverse cycle defrosting method for air source heat pump (ASHP) using subcooling energy of refrigerant to eliminate frost on surface of outdoor coil. The feasibility of thermal energy storage using sub-cooling energy of refrigerant and defrosting were investigated experimentally. The defrosting performances were compared with a normal 850 W capacity ASHP system standard reverse cycle defrosting (SRCD) method. The results indicate that by the TESD for ASHP using sub-cooling energy of refrigerant method, the system coefficient of performance in heating can be improved due to the sub-cooling of refrigerant outlet of indoor coil, defrosting duration and reheating time can be shortened, and the indoor thermal comfort can be improved when defrosting and re-heating. During defrosting duration, TESD for ASHP using sub-cooling energy of refrigerant method improves discharge and suction pressures by 0.57 MPa and 0.11 MPa, respectively, also shortens defrosting duration and re-heating time by 30.8% and 25% in the tested environment, and reduces defrosting power consumption by 22.8kJ, relative to the SRCD method.

Key words: air source heat pump(ASHP), sub-cooling energy, phase change material, thermal energy storage, defrosting

中图分类号:

TU 831.6

董建锴1, 姜益强1, 姚杨1, 闫凌2. 空气源热泵过冷蓄能除霜特性试验[J]. 上海交通大学学报（自然版）, 2012, 46(10): 1604-1608.

DONG Jian-Kai-1, JIANG Yi-Qiang-1, YAO Yang-1, YAN Ling-2. Experimental Study on Characteristic of Thermal Energy Storage Defrosting for Air Source Heat Pump Using Sub-cooling Energy of Refrigerant[J]. Journal of Shanghai Jiaotong University, 2012, 46(10): 1604-1608.

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