The heating performance of a water-to-refrigerant type ground source heat pump system is represented in this paper under the actual working conditions of the GSHP(ground source heat pump) system during the winter seas...The heating performance of a water-to-refrigerant type ground source heat pump system is represented in this paper under the actual working conditions of the GSHP(ground source heat pump) system during the winter season of 2008.Ten heat pump equipments with the capacity of 10 HP each and a closed vertical typed-ground heat exchanger with 24 boreholes of 175 m in depth were constructed.We investigated a variety of working conditions,including the outdoor temperature,the ground temperature,and the water temperature of inlet and outlet of the ground heat exchanger in order to examine the heating performance of the GSHP system.Subsequently,the heating capacity and the input power were investigated to determine the heating performance of the GSHP system.The average heating coefficient of performance(COP) of the heat pump was noted to be 5.1 at partial load of 47%,while the overall system COP was found to be 4.2.Also,performance of the GSHP system was compared with that of air source heat pump.展开更多
为探索多能互补的清洁能源供暖技术,满足北京市村镇分散式建筑清洁供暖需求,在北京农村地区建设太阳能-地源热泵复合式系统,进行太阳能补热热泵供暖实验,并利用COMSOL软件开展地温场热均衡模拟研究。结果表明:相较单一地源热泵系统,太...为探索多能互补的清洁能源供暖技术,满足北京市村镇分散式建筑清洁供暖需求,在北京农村地区建设太阳能-地源热泵复合式系统,进行太阳能补热热泵供暖实验,并利用COMSOL软件开展地温场热均衡模拟研究。结果表明:相较单一地源热泵系统,太阳能补热热泵供暖方案下,地源侧出水温度提升23%,系统制热能效比(Coefficient of Performance,COP)和机组COP分别提升19%、25%;系统运行10 a,地源热泵系统单季节运行方案下总的取热量要多于间歇期自然恢复量,地温场总均衡为-8.91×10^(9)kJ;单一地源热泵方式运行和太阳能补热方式运行在双季节情况下总的取热量小于总的排热量,地温场总均衡分别为4.220×10^(9)、1.084×10^(10)kJ。因此,双季节运行方案对地温场不会产生负均衡,反而会对地温场有一定的热量补充。地源热泵系统运行中加入太阳能补热,对地温场的影响更小,可显著提升系统和机组效率,该模式适用于北京农村地区特别是供暖需求较大的建筑。展开更多
文摘The heating performance of a water-to-refrigerant type ground source heat pump system is represented in this paper under the actual working conditions of the GSHP(ground source heat pump) system during the winter season of 2008.Ten heat pump equipments with the capacity of 10 HP each and a closed vertical typed-ground heat exchanger with 24 boreholes of 175 m in depth were constructed.We investigated a variety of working conditions,including the outdoor temperature,the ground temperature,and the water temperature of inlet and outlet of the ground heat exchanger in order to examine the heating performance of the GSHP system.Subsequently,the heating capacity and the input power were investigated to determine the heating performance of the GSHP system.The average heating coefficient of performance(COP) of the heat pump was noted to be 5.1 at partial load of 47%,while the overall system COP was found to be 4.2.Also,performance of the GSHP system was compared with that of air source heat pump.
文摘为探索多能互补的清洁能源供暖技术,满足北京市村镇分散式建筑清洁供暖需求,在北京农村地区建设太阳能-地源热泵复合式系统,进行太阳能补热热泵供暖实验,并利用COMSOL软件开展地温场热均衡模拟研究。结果表明:相较单一地源热泵系统,太阳能补热热泵供暖方案下,地源侧出水温度提升23%,系统制热能效比(Coefficient of Performance,COP)和机组COP分别提升19%、25%;系统运行10 a,地源热泵系统单季节运行方案下总的取热量要多于间歇期自然恢复量,地温场总均衡为-8.91×10^(9)kJ;单一地源热泵方式运行和太阳能补热方式运行在双季节情况下总的取热量小于总的排热量,地温场总均衡分别为4.220×10^(9)、1.084×10^(10)kJ。因此,双季节运行方案对地温场不会产生负均衡,反而会对地温场有一定的热量补充。地源热泵系统运行中加入太阳能补热,对地温场的影响更小,可显著提升系统和机组效率,该模式适用于北京农村地区特别是供暖需求较大的建筑。
