Characteristic Analysis Of The Ground Source Heat Pump-floor Radiant Heating System Used In The Cold Area

With the development of society and economy, people’s requirement ofthermal comfort in the indoor environment becomes higher, which causes muchmore consumption of energy. Under the stress of energy crisis and environmentalpollution, the application and development of new energy sources and newtechnology is more important. The GSHP can use the law level heat in theshallow soil to provide hot water; the floor radiant heating system is the heatingmode using the low temperature hot water as the heat source and the whole flooras the heating surface. In this graduation thesis, the wildly used numericalsimulation software Fluent is used as the tool to analys is the characteristic of theGround Source Heat Pump-Floor Radiant Heating System used in the Cold Area.In the performance study of underground heat exchanger in soil source heatpump system, first the influence of the thermal physical parameters of the soil onthe heat transfer performance was analysis, then both the thermal physicalparameters of the soil and backfill was considered. Second, the change of theheat exchange value per meter with the inlet water flow temperature and velocitywas discussed, so the range of the temperature and velocity can be chose. Third,the depth of the tube well was considering, and the variation of the heat exchangevalue per meter and the whole tube well heat exchange can be got.For the part of the study of the floor radiant heating, four aspects wereincluded. The first aspect is about the type of the heating pipeline layout.Considering the average surface temperature and heat flux of the ground surface,the rotary type was more suitable for used in the room compare with the parallel type and the double parallel type. The second aspect is about the temperaturefie ld on the vertical section of different part of the floor structure layers, fromwhich can get the heat transfer characteristics in the layers, and the reason of theunevenness of the floor temperature field can be got. The third aspect is thecontrast of the four temperature fields using different kinds of material as thefloor title, and the contrast can be the basis when choosing the floor title for theroom used the floor radiant heating system. At last, by compare the averageground surface temperature at different temperature and velocity of the inletwater flow, the influence of the temperature and velocity to the heating effect canbe summarized.