| This paper analyzes the advantages and disadvantages of the Earth Source Heat Pump System and the Solar Heat Pump System. The Solar-Earth Source Heat Pump System is been proposed from the point of view how to use the solar and earth energy more efficiently. And the theory and experiment studies are also been carried out according to the system in this paper. The main contents include:(1)Both the characteristics of the solar source and the earth source are analyzed in the article. In addition, the structure, the work principle, the operation patterns, the functions as well as the key problems in the application of the system are described in detail in the article.(2)For the two heat source excavations in the system, the solar collector and the ground heat exchanger, the article gives the detailed explanation to introduce them. The heat transfer characteristics of them have important influence to the efficiency of the system. In addition, the theory models of the main components of the system are set up. It is prepared for the simulation of the system.(3)Combined with the theory models of the main components, the Earth Source Heat Pump System and the Solar-Earth Source Heat Pump System are been simulated using the MATLAB software in Yangzhou. The operating characteristics are been analyzed and compared as well.(4)The operation pattern and characteristics of the Solar-Earth Source Heat Pump System are the primary overages of the study. How the quantity of the two heat sources undertake as well as the proportion of the working time are the key aspects of influence of the system operating characteristics. In this article, the related testings to the multiplexed system are been taken in the solar energy and geothermal energy comprehensive utilization experiment platform. The experiment contents mainly include Earth Source Heat Pump System running alone, the Solar-Earth Source Heat Pump System and solar energy-U buried pipe heating mode. The experimental results show that two patterns of joint operation have its unique merit respectively and the operating efficiency of model is higher than mode2. Furthermore the mode2has greater flexibility for the fluctuations regulation of the room loads. With Solar energy-U pipe installation, the temperature of the soil is restored effectively. The recovery time and water tank heat storage capacity are the main determining factors affecting the efficiency of the system. During the experiments, the average COP of the systems are1.85,2.3,2.09,1.98, which could be used to the design and application of the Solar-Earth Source Heat Pump System in Yangzhou and the surrounding areas. |
PDF Full Text Request