| Ground source heat pump(GSHP)has been widely used in the practical project with its high efficiency,energy saving and other advantages in recent years.Capillary ceiling radiation has been increasingly applied to the air conditioning system of building because of its advantages such as good thermal comfort,energy saving and environmental protection.Ground source heat pump absorbs and uses low-grade underground seasonal energy,capillary uses low-quality heat to meet the heating needs of the building,the combination of them has a natural energy-saving advantages.In this paper,the performance of the ground source heat pump integrated with the terminal of capillary complex system was studied by experimental method and simulation analysis method,and annual energy efficiency and exergy of the complex system was studied,on the base of above analysis the energy saving characteristics of the complex system was analyzed.The construction process of experimental table of the ground source heat pump integrated with the terminal of capillary radiation complex system is introduced,the experimental table is built by adding the capillary ceiling and the water mixing device on the original experimental system.The energy efficiency experiments of the BHE and the heat pump unit were carried out on the completed experimental table,and the coefficient of performance of heat pump and the complex system were obtained by calculating the experimental data.The simulation model of the corresponding experimental system was established,the veracity of BHE and heat pump part of simulation model were proved by comparing simulated results and experimental results.On the basis of accurate simulation model,the annual performance of the ground source heat pump integrated with terminal of capillary radiation complex system was simulated,the performance of the complex system under typical climatic conditions was analyzed including the inlet and outlet water temperature of the BHE in summer and winter conditions,the inlet and outlet water temperature of capillary network,the energy efficiency of complex system.The results show that the ground source heat pump integrated with the terminal of capillary complex system is more energy-saving and has a high coefficient of performance compared to corresponding parameters of the air source heat pump integrated with fan coil air conditioning system.Based on the energy efficiency analysis of the complex system,the exergy efficiency and the exergy loss of the ground source heat pump integrated with the terminal of capillary radiation complex system are studied by exergy efficiency analysis method.Compared to the exergy analysis results of air source heat pump integrated with fan coil system,the ground source heat pump integrated with the terminal of capillary complex system has high exergy efficiency with capillary exergy efficiency higher than fan coil,ground source heat pump unit exergy efficiency is higher than the air source heat pump unit,the exergy efficiency of ground source heat pump integrated capillary radiation complex system is higher than the air source heat pump integrated with fan coil system. |
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