一种新型外加热源辅助制热空气源热泵系统
Novel air-source heat pump system with external heat source auxiliary heating
摘要：
空气源热泵空调系统在低温高湿工况下制热运行时除霜频繁，且除霜期间无法持续供热，室内热舒适性差。提出了一种新型外加热源辅助制热空气源热泵系统，实测结果表明：室外侧进风干/湿球温度-7 ℃/-8 ℃工况下，制热运行时间长达594 min，较常规系统延长195%，且化霜期间仍能提供不低于38 ℃的出风，舒适性体验得到较大改善。
Abstract：
Air-source heat pump frequently defrosts at the condition of low temperature and high humidity, and cannot continue heating during defrosting, which resulting in poor indoor thermal comfort. Presents a novel air-source heat pump system with external heat source auxiliary heating. The experimental results show that at the operating condition of -7 ℃/-8 ℃ of outside wet and dry bulb temperature, the continual heating operation time is up to 594 min, 195% longer than that of the conventional system, and the supply air with temperature no lower than 38 ℃ is still provided during the defrosting, which greatly improves the comfort experience.
Keywords:air-sourceheatpump,defrosting,continuousheating,temperaturedrop,thermalcomfort