暖通毕业设计外文翻译---地源热泵系统的模拟与设计.doc

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1、外文翻译： Summarized the recent years source heat pump system simulation and the design aspect research and the progress.First has given the source heat pump system various parts modelling aspect progress, including the vertical pipe installation geothermy heat interchanger, the single well circulatory

2、system as well as several kind of assistance heat dissipating arrangement which uses in the place source heat pump mix system.Next, discusses the scene determination in-depth ground hot natural technology.Third, introduction vertical pipe installation geothermy heat interchanger design method.Finall

3、y, gives in the design source heat pump system uses the system simulation several application example. Key word: Heat pump; Geothermy heat interchanger; Hot nature; Mix system; Model; Design; Simulation1. synopses looked from thermodynamics viewpoint that, uses the source hot work in the air-conditi

4、oning system for the heat source or the heat sink is appealing.This is because, looked from the whole year, its temperature ratio environment dry bulb or the wet-bulb temperature approach (needs) in the room the temperature.Based on this reason, the source heat pump system has the potential compared

5、 with the air source heat pump system in the high efficiency.In actual situation, source heat pump system because does not have the equipment to expose in exterior environment, the flower in the service aspect expense is quite low (Cane, et al. 19982. Although already had some source heat pump syste

6、m technology to obtain the development in the Scandinavian peninsula, but in its commercial development use was actually does well in US.This is mainly is because already has a very big housing air-conditioning system market in US.Because its system has the low energy consumption and the low operati

7、ng cost already proved has attracted very many owners.Uses electricity the peak value in American very many areas to be decided by the air conditioning electricity consumption. Enables some power equipment company regarding this reason to be interested very much to this system, they hoped through us

8、es such system to reduce for the electric power demand.Some small business organization and the public departments already studied this kind of technology the application.The source heat pump system attracts some school manager as a result of it low operating cost, and has the more and more many sch

9、ool use.Already gave GHPC in US about the place source heat pump technology practical application some example research detail.3. Meets down in the paper in the part we first can give the source heat pump system various parts modelling aspect progress, including the vertical pipe installation geothe

10、rmy heat interchanger, the water source heat pump, the single well circulatory system as well as several kind of assistance heat dissipating arrangement which uses in the place source heat pump mix system.Because must design the underground heat interchanger first to have to understand the geothermy

11、 the attribute, this paper second part introduced briefly the determination in-depth ground hot natural model, this method is by to measured the test hole temperature responded the scene test method expands comes.In the paper third part, will be able to introduce will design the vertical pipe instal

12、lation geothermy heat interchanger with the software the method.Finally, gives in the design source heat pump system uses the system simulation several application example, including mixes the GSHP system and the frostproof GSHP system design.4. The 2.GSHP system model constitutes the GSHP system ge

13、nerally is composed by the water source heat pump and the underground heat interchanger, regarding mixes the GSHP system, but also includes several kind of assistance heat dissipating arrangement.These simulation equipment is covered in undeshuts the circulation underground heat interchanger to shut

14、 the circulation double barrel systems to be possible to use the horizontal pipe installation or the vertical pipe installation.Vertical pipe installation system as a result of it high heat transfer efficiency by people many uses.This kind of type closed cycle heat interchanger sets at into the diam

15、eter by a root is 75mm150mm the drill hole U tube is composed.These drill holes after set at into the U tube with the earth backfill which drills or, more universal, the entire kondow pads with the thin mud.Is in the milk usually is avoids the ground water the pollution moreover causing the heat tra

16、nsfer pipeline with to contact completely reaches the greatly good heat transfer effect.Is commonly used the diameter is the 22mm33mmhigh density polyethylene manages (HDPE) in the system pipe installation.Punch depth generally between 30m120m.Two kind of simulation complexity are very interesting.F

17、irst, the survey underground heat interchanger users smallest input design method is may take in the unit time.Next, its can forecast in for several hours (or short time curve) because the building load continuously change has what influence to the underground heat interchanger the simulation patter

18、n also is also is may take.This theory permission and uses electricity the demand forecast to the system energy consumption.Because both method take has been presented by Eskilson(1987) development model as the foundation in this paper, the Eskison method could first discuss, then will be to by Yavu

19、zturk and the Spitler development simulation pattern description. (1999)2.1.1 Eskison research techniquesEskison (1987) aims at the pair hole the ambient temperature distribution definite question solution uses the means which the logic analysis and the mathematical analysis unify.Regarding the init

20、ial condition and in the boundary condition constant even soil the pair hole related value establishment radial direction - axial coordinates, the use transient state finite difference equation carries on the two-dimensional value computation individually.The pipe wall and the mud and so on the indi

21、vidual drill hole essential factor calorific capacity is likely is neglected.The single drill hole temperature field through overlaps obtains the entire drill hole scope.The entire drill hole scope temperature response is transformed to a group of non-linear temperature feedback factor, was called m

22、akes the G- function.This G- function possibly causes the place pair opening wall temperature change situation computation which the specific heat input causes correspondingly with some time in into.As soon as passes through the drill hole scope the feedback to indicate to the steps and ladders quan

23、tity of heat feedback with the G- function that, any random temperature feedback function can because of let above a series of step function the temperature feedback/output decision, moreover superimposes to each gradient function feedback.This process expressed regarding four month-long temperature

24、 feedbacks by the graphical representation method in Figure 1.2.1.2 simulation model here said the simulation model majority of details already introduced by Yavuzturk and Spitler.In this paper will be able to give its brief description.This model essential target is the application in the construct

25、ion energy analysis, this model can forecast the system energy consumption take each hour as the unit.This model nationality will consummate by the Eskilson theory develops is discussed in here.The Master G- function increased the forecast frequency to an hour several times.Eskilson uses for to dete

26、rmine the G- function the data model not to be suitable for the short time curve survey, uses another kind of data model to survey a place pair hole short time internal heat feedback/output pulse the temperature response.Regarding the short time in hot pulse, inside and outside the radial direction

27、position pair hole hot shift affects the axial position hot shift is much bigger than.From this, has produced one kind of two-dimensional radial direction constant volume model.The details see also Yavuzturk, et al. (1999).2.2 vertical circular hole well vertical circular hole well uses in directly

28、carrying on the heat change with the ground.One kind used for to study the vertical circular hole well performance the data model already to research and develop, it was composed by two parts: Pair hole constitution node model, in nearby ground water flowing and ground heat transfer constant volume

29、model.This kind of model utilization including the heat transfer which causes to the ground water flowing is clear about processing (Rees, et al.2003).This kind of model may inspect vertical circular Kong Jing the performance in the use influence and the vital significance.Its performance is most ha

30、s in following several parameters sensitively: Current capacity, pair hole length, ground heat conductivity and hydraulic pressure conductivity.2.3 water source heat pump Jin and Spitler(2002a) has invented one kind of parameter estimate water source heat pump model.This kind of model carries on the

31、 thermodynamic analysis to the freezing circulation, the specific heat exchange model is simpler, simultaneously is more precise than the freezing circulation compressor model.In the second paper (Jin, et al.2002b), carries on the expansion to this model, including maneuver type air compressor sub-m

32、odel and use antifreeze step.In the manufacture manufacturer table of contents data narrated in model each kind of parameter which the multivariable optimization algorithm estimates.Jin(2002) in detail narrated the parameter which the multivariable optimization algorithm and estimates.Compares the e

33、quation - being suitable type model which before then produces, the water source heat pump model is more precise.Jin(2002) also introduced one kind of similar water source heat pump model.In 2.4 mixed style GSHP system thermal compensation source heat pump system the pair hole cost is the system cos

34、t important part, but it mainly is decided by the local geology condition.This kind of equipment mainly uses in refrigerating in the building.Is bad in this kind of ground thermal conductivity, drill hole condition crude place, water source heat pump system cost quite expensive.For all this, we may

35、adopt the primary cost with to be able the effect compromise means, reduces the pair hole scope, installs the assistance heat dissipating arrangement in the heat pump water pipe.Such system is called the mixed source heat pump system.In the mix system water pipe has each kind of different type heat

36、dissipating arrangement, for instance the cooling tower, brings the heat interchanger shallow pool, the hydraulic pressure heating surface or is called the bridge level.Chiasson(2002a) has invented the shallow pool model, its principle is: Because shuts the circulation heat interchanger, needs to in

37、stall the counter-flow heat transfer installment in the water level surface mounting natural heat transfer installment foundation.Chiasson(2000b) simultaneously also invented one kind to be suitable in the hydraulic pressure heating surface or is called the bridge level the finite difference model.T

38、his kind of model even can imitate the snow melting process.The above these model use experimental assistance heat dissipating arrangement, obtains the approval in Oklahoma State University.1. soil quantity of heat characteristic scene determination survey in-depth ground heat conductivity regarding

39、 the place source heat pump system very important.The pair hole width length mainly is decided by in-depth ground hot nature.The determination in-depth ground heat conductivity traditional method is first definite around the pair hole the ground type.After the determination, may determine its heat c

40、onductivity through Double barrel Heat pump System design Handbook about the ground type material (EPRI1989).According to the report, in the ground information heat conductivity has a more widespread value, therefore could find one kind of more precise surveying to decide the ground heat conductivit

41、y method to be better. The in-depth ground heat conductivity cannot the immediate determinant, only be able to infer through the tepid transformation measuring method, but also must use some geothermy transmission pattern, for instance linear water source law (Ingersoll and Plass1948; Mogensen1983)

42、or cylindrical water source law (Carslaw and Jaeger1947).Interesting is they also has the opposite use - - to determine its hot nature by the ground performance, but is not determines its performance by the ground hot nature.Although the linear water source law and the cylindrical water source law m

43、ay in turn utilize in the reckoning ground heat conductivity, but still needed to make some simple hypotheses, because its influence result was not easy to determine.Uses the pair hole particular data model, to place pair hole geometry and thermal fluid, pipeline.The mud as well as the ground hot na

44、ture carries on the detailed description, may reduce the element of certainty which the simple hypothesis creates.Thus, can have a more precise estimate to the geothermy conductivityThe ground temperature responded the analysis step has two basic types: Analytic method (Witte, et al.2002) and parame

45、ter estimate law (Austin1998; Austin et al.2000; Shonder and Beck1999).Witte et al(2002) uses the linear water source law and the indefinite analytic method carries on the scene test to the ground heat conductivity.The Austinet al(2000) parameter estimate law is surveys one with the vertical drill h

46、ole transient state two-dimensional data constant volume pattern known to change the time the heat flux input ground temperature response.The Nelder Mead simplex operation principle is used for to excavate the ground and the mud heat conductivity most valueable use, that is the temperature which sur

47、veys the experiment responded and the estimate temperature between responded the interpolation reduces the threshold. The survey ground heat conductivity test installation is by Eklof, Gehlin(1996) and Austin(1998) invents independently.Figure 5 is Austin et the al. (2000) invention test system sche

48、matic drawing.The test installation places in the trailer which may drive.The pair hole installment 50 hour experimental proofs by one is satisfied.Short experimental time suits the human regard extremely, moreover is possibly the subject which the future will study.参考文献 摘要：总结了近年来地源热泵系统的模拟和设计方面的研究和进

49、展。首先给出了地源热泵系统各部件建模方面的进展，包括竖直埋管地热换热器、单井循环系统以及在地源热泵混合系统中采用的几种辅助散热装置。其次，讨论现场测定深层岩土热物性的技术。第三，介绍竖直埋管地热换热器的设计方法。最后，给出在设计地源热泵系统中采用系统模拟的几个应用实例。关键词：热泵；地热换热器；热物性；混合系统；模型；设计；模拟1.简介从热力学的观点来看，在空调系统中利用地源热作为热源或者冷源是吸引人的。这是因为，从全年来看，其温度比环境干球或湿球温度更接近于室内（所需要）的温度。基于这个原因，地源热泵系统较之空气源热泵系统在高效率上更具有潜力。在实际情况中，源热泵系统由于没有设备暴露在外部的环境中,花在维修方面的费用是比较低的(Cane, et al. 1998).虽然已经有一些地源热泵系统技术在斯堪的那维亚半岛得到发展，但是其商业上的开发利用却是在美国做得最好。这是主要是因为在美国已经存在着一个很大的住宅空调系统市场。其系统由于有着较低的能耗和低运行费用已经证明吸引了很多业主。在美国很多地区用