Research On The Application Technology Of Ground Source Heat Pump In The Subway Station In Hot Summer And Cold Winter Area

Urban rail transit system which has the characteristics of large capacity,fastspeed,low pollution is geting more and more social attentions.But it should be notedthat the subway system not only bring convenience to people’s lives but alsoconsumes a lot of energy which air conditioning system energy consumption accountsfor more than50%of the whole metro operation energy consumption.So it ismeaningful to reduce the hot summer and cold winter area metro stationair-conditioning system energy consumption because most subway station in ourcountry are concentrated in hot summer and cold winter area at present.Ground sourceheat pump system is a kind of renewable energy systems which widely used,technology matures and goode conomic benefits.So it is a matter worthy of academicattention to research on ground source heat pump technology in the subway station inhot summer and cold winter region.Different from ordinary buildings, the subway station in hot summer and coldwinter region has no need of heating during the winter,and resultled to a lot of heataccumulation in the soil which willaffect the system run efficiently in a long time. Inthe paper, using the buried pipe-cooling tower system to provide cooling in summerwhich regard cooling tower as auxiliary cooling device. The paper also built theenergy consumption model and ground source heat pump system model of a subwaystation which in Wuhan by Dest and TRNSYS simulation software.According to thetwo model in this paper, we studied the following points:Firstly,through the theoretical research and Dest simulation results analysis, thepaper studied the composition and proportion of energy consumption in the subwaystation, and get the hourly cooling load and the largest annual accumulative totalcooling load of the station.Second, the paper carried on the design calculation and equipment selectionthrough the project example. Building the TRNSYS model on the basis of apparatusparameter. The model could be used in many place and has reference function inmetro station design and calculation. Third, through the study on the soil temperature curve, buried pipe outlet fluidtemperature and system energy consumption of ground source heat pump system, thepaper get the system control scheme of the buried pipe-cooling tower system in thehot summer and cold winter areaFourth, the paper compared the ground source heat pump system and thetraditional water chillers to analyze economic environmental benefits. Results showthat if the subway station in hot summer and cold winter region using ground sourceheat pump system, it will reduce22.9%of the whole system power consumptionevery year, annual operation cost savings investment of19700yuan. Having thepotential annual715000yuan carbon trading benefits, economic and environmentalbenefits are remarkable.Though the research above, it is technical feasibility and economic rationality touse ground source heat pump system in hot summer and cold winter region. Itsenvironmental benefit is remarkable and worth spreading...