摘要
本文基于太阳能集热器的运行不稳定性和空气源热泵冬夏季极限天气性能衰减,建立了一种太阳能—空气源复合热泵系统,并对其运行模式和技术特点进行了分析。实验测试了夏季名义工况和最大负荷工况下复合系统制冷兼制热水性能系数;冬季室外换热器需要和不需要周期除霜工况下复合系统的制热性能系数;冬季周期除霜工况下热泵的除霜时间和除霜效果。结果表明:该复合系统在夏季(名义和最大负荷工况)和冬季(除霜、不除霜工况)的COP比常规空气源热泵系统高;冬季除霜条件下利用蓄热热水热量反向除霜时间明显小于常规除霜模式的除霜时间且效果良好。
In view of the instability of solar heat collector and decrease of the coefficient of perform- ance of air-source heat pump in adverse condition, the paper designs a solar-air source compound heat pump system and analyzes the corresponding operating models and technical characteristics of the sys- tem. Experimental study has been conducted in different conditions, such as coefficient of perform- ance of the compound system on conditions of nominal and maximum load in summer, heating coeffi- cient on conditions of frosting and d that coefficient of performance of the efrosting in winter and defrosting effect in winter. Results show compound system on conditions of nominal and maximum load in summer and on conditions of frosting and defrosting in winter are higher than that of conventional air source heat pump system. Defrosting time with accumulating heat of hot water is shorter than that with conventional defrosting mode and the defrosting effect is better.
出处
《山东建筑大学学报》
2012年第2期212-215,237,共5页
Journal of Shandong Jianzhu University
基金
山东省自然科学基金项目(Y2007F08)
住房和城乡建设部科技计划项目(2008-K1-28)
关键词
太阳能
空气源热泵
复合热泵
冷凝热回收
性能系数
solar energy
air source heat pump
compound heat pump
condensation heat recovery
coefficient of oerformance
