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Based on the Numerical Simulation of River Water Source Heat Pump System of the Technology of Tail Water Discharge

Author: ZhangJingYao
Tutor: QingXiaoXia
School: Chongqing University
Course: Architecture and Civil Engineering
Keywords: river source heat pump system tail-water temperature expansion numerical simulation
CLC: TU831
Type: Master's thesis
Year: 2012
Downloads: 58
Quote: 0
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Abstract


River water source heat pump system because of its high efficiency and energysaving of the outstanding advantages,in recent years have been applied more and more.However,as the river water source heat pump system application of growing, its tailwater to help victims of the hot water discharge (cold) pollution, is gradually becomesthe focus of the problem. River water source heat pump system for the water dischargetemperature diffusion rule, and tail water vent technology research, analysis of waterresource heat pump for river technology application influence on water environmentprovides the basis.The numerical simulation method to river water source heat pump system inphysics experiment model and river water source heat pump chongqing grand theatreriver tail water system discharge temperature diffusion rule, normal temperature rangeand influence extent based on the research of water source heat pump system to theriver through the water vent in different arrangement, quantity and spacing oftemperature diffusion range and quantity of comprehensive, had determined thebeautiful vent of technology. The main conclusions of research that is as follows:①Water temperature is30.55℃, velocity of0.08m/s river water source heatpump system test model temperature drainage pipe diameter by drainage for50mmvent of24.4℃in water temperature and flow velocity of0.06m/s, long width deep6m,2m,0.9m simulation to the river, Cause increased water temperatures of1℃riverarea of effect, length direction along river is0.8m; Along the river is0.15m the width,depth direction along the river was the biggest0.1m; And with the water downstreamlose to move, temperature drainage cause river water temperature of height extentdeclines gradually, trend gradually slow down.Through to the physical model experiment and numerical simulation oftemperature measurement of the temperature error analysis indicate that the relativeerror within1.73%. Physical experiment model numerical simulation results and themeasured value with better properties.②Water temperature is31.5℃, velocity of1.4m/s chongqing river water sourceheat pump system theater temperature drainage by0.4m*1.5m vent of watertemperature is25.4℃, velocity of1m/s, ratio was deeply200m,20m and10m to theriver,In the upper, middle and lower in the water, cause the temperature rise1℃sphere of influence, length direction along the river the biggest were10m,6.m,2m, widthdirection along the river the biggest were3.3m,2.2m,1.4m, and along the water depthdirection maximum is1m; As temperature drainage to downstream lose move, causeriver water temperature increasing range decrease gradually trend gradually slow down..Through to the grand theatre in chongqing water source heat pump system riverwen drainage the simulation result with the temperature measured error analysis showthat the relative error within2.5%. River water source heat pump system temperaturedrainage numerical simulation results accuracy is better.③Water temperature for5℃, the velocity of1.4m/s chongqing river watersource heat pump system theater temperature drainage by0.4m*1.5m vent of watertemperature is11.1℃in, velocity of0.5m/s, ratio was deeply200m,20m and10m tothe river,In the upper, middle and lower in the water, cause temperature drop1℃sphereof influence, length direction along the river the biggest were9m,7m,4.5m, widthdirection along the river the biggest were6.5m,6m,4mand along the water depthdirection maximum is1m; And, in the upper, middle and lower river in the water, thelong, width direction, cold water drainage cause temperature drop1℃temperaturedrainage area of effect caused by temperature rise than1℃influence of range, waterdepth direction along the same effect④The numerical simulation of the vent technology research results show that:1)water source heat pump system such as river tail water certain area, flow must terminatedischarge, when using rectangular outfalls vertical arrangement, because along the flowdirection of large contact area, the water environment of the influence degree of thesmall;2)the river water source heat pump system by the water vent, since heatdispersion diffusion, than single discharges the water environment sphere of influenceto small. But considering the influence of the water environment and difficulty inconstruction project scope, the influence of the bank and the landscape and other factors,sure better for double mouth or vent number three mouth;3)river water source heatpump system with double mouth tail water discharge, comprehensive consideration ofthe tail water drain the water environment, the influence of factors such as the scope ofquantity, the better the eliminator spacing for30m to40m.

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