寒冷地区直膨式太阳能热泵热水器性能分析  

PERFORMANCE ANALYSIS OF A DIRECT EXPANSION SOLAR ASSISTED HEAT PUMP WATER HEATER IN COLD AREA

作　　者：张东[1] 王春龙[1] 周晓东[1] 孔祥强[2] 

机构地区：[1]兰州理工大学太阳能与气体水合物研究中心,兰州730050 [2]山东科技大学机械电子工程学院,青岛266510

出　　处：《太阳能学报》2013年第12期2121-2127,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51166008);国家科技部科技支撑计划(2011BAD15B03)

摘　　要：基于直膨式太阳能热泵热水器的数学模型编制系统仿真程序,分别选取兰州地区典型气象年、辐射极低年和辐射极高年3种气象参数,计算得出3种不同气象参数下系统全年性能参数。分别选取1月2日和7月16日作为冬季和夏季典型日,输入典型气象年气象参数,计算得出典型日系统性能参数。模拟计算结果表明:将水从20℃加热到50℃,系统全年运行COP在3.500以上,在7月份达到最大值5.630,热水加热时间均在140min以内,在7月份达到最小值91min;系统性能具有明显的季节差异,在冬季典型日和夏季典型日系统平均COP分别为3.768和5.869;系统的运行时段对系统性能具有很大影响,中午时段的运行性能一般要优于其他时段。由系统全年和典型日性能分析结果可知,兰州地区的气象条件可以保证系统具有较好的全年运行性能。Simulation program of a direct expansion solar assisted heat pump water heater system （DX-SAHPWH） was coded based on the mathematical models of the system. The annual comprehensive performances of DX-SAHPWH were calculated for three different meteorological parameters, including weather data of Typical Meteorological Year （TMY）, low solar radiation year and high solar radiation year in Lanzhou, respectively. January 2nd and July 16th were selected to be the typical days of winter and summer, respectively. And the system performances in typical days were analyzed cluring the water was heated from 20~C to 50~C. The calculation results showed that coefficient of performance （COP） of the whole year was above 3. 500 and the maximum value was 5. 630 in July; all the heating time of hot water was below 140 minutes and the minimum value was 91 minutes in July. The effects of season difference on the system performances of the system were obvious, and the average COP of typical days in winter and summer was 3.768 and 5. 869, respectively. The effect of different working period in a day on the system performance was bigger, which was better in midday than other period. The analyses indicated that DX-SAHPWH has better annual operativn performarces under weather condictions in Lanzhou, it is worth further evaluation.

关 键 词：太阳能热泵热水器 典型气象年 典型日 性能分析 寒冷地区 

分 类 号：TK114[动力工程及工程热物理—热能工程]