Solkane7及REFPROP制冷系统设计参数查询与指导

1、制冷系统设计参数查询与指导L、T图为液态制冷剂过冷与眼气过热圧焙團I1、已知条件如下面例某空调制冷装蚤使用R12为制冷剂,制冷量巧CkW,冷擬温度巴曲匕,蒸发温度令匸，过冷温度t4u丽匸，吸气温度川=门匸，试完成该工况下制冷循环的熟计阜。：、确走状态点，找出蒸发压力与冷凝压力线。同时具有过冷过热的循环如上團中1：-丫丿：彳一1,根堀杓和tl在R.I2热力性质表上查出P3=).96MPa绝对压力PIM).34MP【绝对压尢1根据压熔图可知P2-j4-?3Pl：=p5-=rL-、由Z和L的交点确定i由I：沿等慵线向右上方延俾，与的交点为点2：;t4：与卫的交点为-】点.*垂直向下与E的交点为宁。仏

2、确定状态参数根据已经确定的各狀态位気在R匚压焙图上找到各点焙值，分别対hl:=36lkj/kgli2:=580kj/kgh-:=hji:=2.34kj/kgg热力计算单位工质制冷量为q2=hlJ-h51-234=127lj/kg单位工质放热量为ql=h-h_：=3加-d-=l曲kj/kg压缩机消耗的净功为w=h2:-hl=38()-361=IQkj/kg制冷利质为qm=p/q2=5()/l27=0.394炬/s冷负荷为c=qm(h2?-h4?)=()394(38(K234i=57.524kj/s制冷系数为c=q2/w=l27/19=6.68压缩机总消耗功量为P=qmih2Mi)=(l.394*

3、l9=7486kw人在既不过冷也不过热时的计算与上述计算类似，这时的循环按I-2-4-5.1进行，各状态点及参数均不难确定i/yjK以下是各梦救査找说明，(软件fSolkanc)已知冷谯温夏t3=4jficeXE*oxgtB伦2C*4in&17925W/环“力出龙遊旷$；性社豪芳.iaamw（Fxwk寸（h）|0rctp)已知诗换温度40匸则对应的拎匾压力p3=().96MPa已知烝友温康t)=3X2则对应的惑友压力p)=().34MPa打开软件界面如下：1R.AZw.9XZ1R.AZw.9XZ本软件在使用时需要进行设定1、茅一步是改变燥作的符号设定.下面把符号修改为容易谟IfiB常用符号Op

4、tionsLnitSelectUnitsTemperatuieKPressuieMPaJVolumem?Mss/Molekg;kmoi尬硼kJSoundSpeedm/sJViscoskj?叫$TbmalConductiviymW/m-KScifaceTemionPressuremN/mJDimensonUnts)0.101325teselUmts_1PgpediesCMolarBatisSIwithCel沁MoterSI磁$ComposilionMassBssjsCMohrBa$i$cg$1_1Mixedoncd|EnglishUnitlessL厂U$eGageFresure(BrocUicP

5、ressureOEfcvathn接下来是况体设足，把徐休改凭为後媒各矣Snlxtancc_SpecifyfluidctSpecifyFluidSet点击此处改芟为国标符号Chooseflud$etAllfluidsCorjjmonFluidsRefiigei3r*$NMuralGasFluidsCryogensCalibrationFluidsGERGandAGAgFluid选医拎嫄液体第三个单选按钮好文档.让好朋友也看Jix本软件在便用时需要迸行设罡1、第一步是改变攧作的符号设走，下面把符号修改为容勒读懂的常用符号OptionsUnits播下来是流伟设罡.把流体改:戏为冷媒各夬Substan

6、ceSpecifyfluidset0SpecifyFluidSetCheesefluidsetAlllluidsCcfnmcnFluid$RefrigerantsNaluialGa?FUd&C(5fogen$CaibidionFluidsGERGandAGA8FluidsCancelAddNeiwSetRename选圣冷媒液体弟三个单迓按钮好文档.让好馭也看到XhEditSetfieJeteSet在下图中远择想更的诒無然后点击OK損毎荻件便运行在本痕体的撰作上面，之后便可对本帧体进行数抿计算弓査找luisrancefluidinrormationRli-CCI2F2dicRiwodifluor

7、omethane(CAS#75-71-8)Molarmass|120.91kg/kmolTriplepttemp1161KNormalboclngpt2434K&GephasedipoleatNBPI0.51debyeCriticalPointTemperature385.12KDensityPressure4.136MPa|565.0kg/m?Acertffcfactor017948Ranosofappfability116.1KMinimumtemp.Maximumtemp.MaxrnumpressureMaximumdendiy5250K|200.0MPa|1829.4kg/m?NI$T

8、Rec:FEQHelmho吃equationofslateforR12ofMarx8laH19$2lLITERATUREREFERENCEMarx.V,Piuss.A.andWgnei.W,MNeueZuslandtgleichungenfuerR12ZR22,R11undR113BeschreibungdestheimodynamishchenZustandsverhaltenbeiTemperaturenbis525KundDrueckenbis3)0MPa,Duesseldofl,VDIVeilag,Seties19(V/aermetechnikKaeltetechnikNo5乙1992

9、EquationofStateViscosityIhermalConduclrvitySurfacetensionMellingLineSubSmalionLineTheinceflainliesindensityare02belovlhecriticdpointlemperatureand|Copy缈QKPjinl下面就可以査找憩吏的数据了CalculateSaturationtabicSpecifySaturationTableGVeporlquidsati/ataDn广Sdidu：dsluraliDn(Mdlhgline)Sdi-vapofsatuiaiion(SuUraatonline

10、)VaiyTerrpefatufeCPrecoiieCQu&ilyalfixedICQuityalfixedp选择逞度时inputPropertyRangeInitialTemperature12O.OKFinalTemperature3300KIncfejaenl50K厂Leaveaclwe厂AddtocucenttableOKCancel选择压力时选择温度持性时InputPropertyRange厂AddtocurrenttableQKdncd选择压力特性时InputPropertyRange厂AddtocunenttableOKICancelI/V-J则对应的莖发压力pl=O.34MPa

11、对应的饱和压力是0.95S82MPa己知冷凝盅度(3=40X2则对应的冷漣压力p3=0.96MPa已知烝友温度HbC当冷凝温度为4()度时，口回冈Temperature(C)Pressure(MPa)LiquidDensity(k如3)VaporDensity(kg/m3)LiquidEnthalpy(kJ/kg)VaporEnthalpy(kJ/kg)LiquidEntropy(kJ/kg-K)VaporEntropy(kJ/kg-K)1360000.867911269.949.152235.12367541.11921.547G237.0000890021266.150.426236.14

12、367901.12251.5473338.0000912531262.251.727237.16368.261.12571.54704390000935471258253.057238.19368611.12891.54685400000958821254354416239.22368961.13221.5465叵当菱发温度为3度时.对应的饱和压力是0.33968MPaTemperaturePressure(MPa)LiquidDensity(kg/m：)VaporDensity(kg/nnV)LiquidEnthalpy(kJ/kg)VaporEnthalpy(kJ/kg)LiquidEntropy(kJ/kg-K)VaporEntropy(kJ/kg-K)1300000339681386.419.611202.82354131.01021.55812400000.350711383.120219203.76354571.013G1.55773500000362011379.820.84220471355011.01691.55734600000.