太阳能辅助闭式热源塔热泵系统冬季制热性能  

Heating performance of solar assisted closed-type heating tower heat pump system in winter

作　　者：冯荣 刘晔 方俊飞 孟欣[1,3] Feng Rong;Liu Ye;Fang Junfei;Meng Xin(School of Mechanical Engineering,Shaanxi University of Technology,Hanzhong 723001,China;School of Energy and Power Engineering,Xi'an Jiaotong University,Xi’an 710049,China;Shaanxi Key Laboratory of Industrial Automation,Hanzhong 723001,China)

机构地区：[1]陕西理工大学机械工程学院,汉中723001 [2]西安交通大学能源与动力工程学院,西安710049 [3]陕西省工业自动化重点实验室,汉中723001

出　　处：《农业工程学报》2020年第11期210-217,共8页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金(51706128);陕西省自然科学基础研究计划(2019JM—508);陕西省教育厅科研计划项目(17JS019);陕西理工大学科研计划资助项目(SLGQD2017—22)。

摘　　要：热源塔热泵系统以空气为冷热源,在冬季制热时其性能会随环境温度的降低而降低。为此研发了可应用陕南地区农村建筑的太阳能辅助闭式热源塔热泵系统,试验研究了冬季工况下系统的制热性能,初步分析了太阳热能与空气热能的互补机理。研究结果表明:系统制热量范围为12.1~15.2 kW,热泵机组性能系数范围为2.3~3.5,系统能效比范围为1.5~2.4,供热温度高于41℃;冷却水温度对压缩机耗电量的影响程度大于防冻溶液温度,冷却水平均温度每升高1℃,压缩要耗电量增加98.1 W,而防冻溶液平均温度每升高1℃,压缩机耗电量减小9.5 W;太阳能辅助热源塔热泵制热模式下,热泵机组通过改变防冻溶液与空气和集热工质换热温差的方法来改变防冻溶液从空气和集热水箱中的吸热量,以实现空气热能与太阳热能的互补。建议在实际应用中应避免供热温度过高以减小压缩机耗电;在集热水箱温度较高时通过降低风机频率减小风机耗电以提高系统综合能效,但应避免风机低频率工作可能给机组安全运行带来的隐患。The heating tower heat pump system used air as its cold and heat source,whose performance will drop as the ambient temperature decreases during heating periods in winter conditions.Thus,a household solar assisted closed type heating tower heat pump system which could be used for the rural buildings in southern Shaanxi area was developed,which mainly include a solar heat collector,a hot water tank,a closed-type heating tower,a heat pump unit and the pipes and values.The heating performance of the system under winter heating conditions was experimentally studied,and the complementary mechanism of solar thermal energy and air thermal energy was preliminary analyzed.The results show that,first,under single heating tower heat pump model,the heating capacity of the system is in 12.3 to 15.0 kW,the COP of the heat pump unit is in 2.3 to 3.5,the SEER of the system is in 1.5 to 2.1,under the solar assisted heating tower heat pump model,the heating capacity of the system is in 12.1 to 15.2 kW,the COP of the heat pump unit is in 2.7 to 3.3,the SEER of the system is in 1.8 to 2.4,the heating temperature is higher than 41°C under two models,which could meet the temperature demands of building heating in southern Shaanxi area.Second,the temperature of cooling water has a greater impact on the power consumption of the compressor than that of antifreeze solution,for every 1°C increase in the average temperature of cooling water,the power consumption of compressor increases by 98.1W,and for every 1°C increase in average temperature of the antifreeze solution,the power consumption of the compressor decreases by 9.5W.Third,under the single heating tower heat pump model,the change in the heat absorption of the heating tower is consistent with the change of ambient temperature;under the solar assisted heating tower heat pump mode,the absorbed solar thermal energy by the antifreeze solution is consistent with the change in the temperature of hot water tank,and the change of the heat absorption from ambient is opposite to the change

关 键 词：太阳热 热泵 效率 空气热能 闭式热源塔 

分 类 号：TK11[动力工程及工程热物理—热能工程] TU832[建筑科学—供热、供燃气、通风及空调工程]