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Simulation on the Solar-assisted Ground-source Heat Pump Heating System with Seasonal Soil Thermal Storage in the Underground Pit

Author: HanJing
Tutor: ZhengMaoYu
School: Harbin Institute of Technology
Course: Heating,Gas Supply, Ventilation and Air Conditioning Engineering
Keywords: Solar Underground pits Horizontal pipe Seasonal soil heat storage Simulation
CLC: TU831.3
Type: Master's thesis
Year: 2010
Downloads: 122
Quote: 2
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Abstract


Summary analysis of domestic and international ground source heat pump , solar - ground source heat pump and solar - soil heat storage ground source heat pump , etc. on the basis of this paper, Solar energy - the underground pit seasonal soil regenerative heat pump heating system . First introduces the basic theory of the solar energy, soil , in order to a solar collector surface solar radiation and soil initial temperature distribution . Secondly, the Beijing area , select an existing single building use DEST calculate Hourly thermal load , according to the instantaneous maximum heat load of the system design , solar collectors , underground pits and horizontal pipe , heat pump units , circulating pumps and plate heat exchanger design selection , and introduces the main operating mode of the system . Subsequently, on the basis of a mathematical model of the system part to build a solar - underground pits seasonal soil regenerative heat pump heating system mathematical model developed part of the system start and stop conditions , and to determine the system the conversion conditions of the operation mode . Based on this model , the dynamic operating characteristics of the system in the Beijing area , and the collector inclination , pits the initial temperature of the collector area , pits the thickness of the insulation layer , the moisture content of the soil , pit volume and heat pump capacity main parameters such as the impact on the operating characteristics of the system dynamics . In addition, through a comparative analysis of the dynamic operating characteristics of the system in several typical regions of the country , the area of application of the effect of the system better . Finally, the combination of a central heating system , the economic analysis of the system , through the analysis shows that the system is economically viable . The results of this research provide a useful reference for the application of solar energy - underground pit seasonal soil regenerative heat pump heating system , provides the basis for further in-depth study of the system data .

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CLC: > Industrial Technology > Building Science > Housing construction equipment > Air-conditioning, heating, ventilation,and its equipment > Air-conditioning > Air-conditioning systems
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