227-太阳能空气源热泵蒸发器抗结霜特性的研究.pdfVIP

太阳能/空气源热泵蒸发器抗结霜特性的研 究 太原理工大学 董旭 田琦☆ 珠海格力电器股份有限公司 黎珍 摘要：提出一种应用R407c 制冷剂的太阳能/空气源热泵蒸发器，是在常规空气源热泵 蒸发器外表面电喷太阳能选择性吸收涂层，并设置透明的室外机外壳，可提高蒸发器日间工 作的表面温度，预防初期结霜，有利于逆循环除霜的热能提取。提出一种除霜性能系数，用 于直接体现热泵蒸发器除霜能效水平的高低。在对比实验条件下，太阳能/空气源热泵的逆 循环除霜性能系数为0.29，相比常规空气源热泵的0.23 提高了26.1%，说明太阳能/空气源 热泵蒸发器的设置有效提高了热泵除霜能效。太阳能/空气源热泵蒸发器避免了以往除霜技 术复杂的制冷剂管路控制和需要较大的室外机安装空间，更利于在安装空间狭窄的高层建筑 用户中推广。 关键词：太阳能/空气源热泵蒸发器 太阳能选择性吸收涂层 逆循环除霜 除霜性能 系数R407c 制冷剂 Research on Frost Resistance of Solar/Air Source Heat Pump Evaporator Dong Xu, Tian Qi★and Li Zhen Taiyuan University of Technology, Jinzhong 030600, China Gree Electric Appliances, Inc. of Zhuhai, Zhuhai 519000, China Abstract: A kind of R407c solar/air source heat pump evaporator is put forward, which consists of a kind of solar selective absorption coating on the surface of conventional evaporator and a kind of transparent shell on the outdoor unit. These settings can improve the surface temperature of evaporator during the daytime work and be advantageous to the early frost prevention and the heat extraction during the reverse-cycle defrosting. A kind of coefficient of defrosting performance COPd is proposed to reflect the energy efficiency level of defrosting on the evaporator directly. Under the condition of comparative experiments, the reverse-cycle defrosting COPd of solar/air source heat pump is 0.29, which is 26.1% higher than the 0.23 of conventional air source heat pump. The solar/air source heat pump evaporator improves the defrosting energy efficiency of heat pump effectively. The solar/air source heat pump evaporator avoids the complex refrigerant line control and the need of large installation space for outdoor unit, which are existing in the application of current defrosting technology for air source heat pump evaporator. It