摘要
对于家用空气源热泵低温环境下运行结霜问题,目前采用最广泛的处理方式为空调逆循环除霜。然而,这种方式最根本的问题是在除霜没有足够的热量供给空调使用,最理想的方式就是蓄热除霜。选用十二水磷酸氢二钠作为相变蓄热材料,从制热能力、除霜时间、温度变化等方面对比蓄热除霜系统与常规逆循环除霜系统的差异进行试验对比,验证蓄热除霜系统的有效性。结果表明,与常规逆循环除霜相比,蓄热除霜系统除霜时间缩短近50%,低温及超低温周期制热量提高8%~12%,在除霜时使房间温度波动由常规7℃降低至2℃,蓄热除霜系统能极大地提高房间热舒适性。
In order to solve the frosting problem of household air source heat pump(ASHP)operating under the condition of the low temperature environment,the most widely used defrosting method is reverse cycle defrost.However,the fundamental problem for such a method is that there is insufficient heat available for ASHP during defrosting,the heat storage defrosting mode is an ideal method.By reporting on an experimental study of the effectiveness of the heat storage defrosting mode,disodium hydrogen phosphate dodecahydrate is used as heat storage phase change material.Three factors,heating capacity,defrosting time and temperature fluctuation,to compare the difference between the heat storage defrosting system and the conventional reverse cycle defrosting system.Results indicated that the use of this PCM-based defrosting method could help increase the cycle heat,shorten defrosting time.The indoor temperature fluctuation of is reduced from the normal 7℃to 2℃during defrosting.The heat storage defrosting mode can greatly improve the thermal comfort of the room.
作者
姬安生
谭周衡
杜顺开
曾小朗
JI Ansheng;TAN Zhouheng;DU Shunkai;ZENG Xiaolang(Guangdong Midea Refrigeration Equipment Co.,Ltd.,Foshan 528311)
出处
《家电科技》
2021年第S01期234-237,共4页
Journal of Appliance Science & Technology
关键词
十二水磷酸氢二钠
蓄热
除霜
相变材料
热舒适性
Disodium hydrogen phosphate dodecahydrate
Heat storge
Defrosting
Phase change material
Thermal comfort
