JB-T 7249-1994 制冷设备 术语

J73JB/T724919941994-07-181995-07-01()I1121334125186247318349381045A50B62JB/T72491994()1122.1refrigeration2.2refrigeratingmachine2.3refrigeratingmachinery2.4refrigeratingplant2.5refrigeratingengineering2.6cryogenics–1202.7compression-typerefrigeratingmachine2.8absorption-typerefrigeratingmachine2.9steam–jetrefrigeratingmachine2.10heat-pump2.11heatingheat-pump2.12coolingandheatingheat-pump1994-07-18JB/T724919941995-07-01JB/T7249199422.13peltiereffect2.14-Ranque-Hilsoheffect2.15–Joule–Thomsoneffect(dT/dp)2.16thermo-electricrefrigeration2.17semiconductorrefrigeration2.18vortextube-2.19fluid2.20laminarflow2.21turbulentflow2.22density2.23specificvolume2.24viscosity2.25absoluteviscosity2.26kinematicviscosity2.27surroundings2.28criticalvelocitya.b.c.JB/T724919943d.2.29calibration2.30demarcation2.31machineroom2.32declinationofsun()()2.33degreeday2.34solarconstant2.35normalatomosphericpressure101.325kPa2.36wiredrawing2.37thermalinsulation2.38soundinsulation2.39noisereduction2.40accumulationofcold()()“”33.1phasechange()3.2fog3.3frost0JB/T7249199443.4liquefaction3.5evaporation3.6melting3.7sweating3.8lyophilization3.9thermodynamicparameters3.10boilingpoint-3.11meltingpoint3.12dewpoint3.13criticalpoint(criticaltemperature)(criticalpressure)(criticalvolume)3.14internalenergy3.15()latentheatofvaporization(condensation)3.16heatoffusion3.17heatofreaction()3.18idealgaspV=RT3.19actualgas()3.20gasconstantpV=RTRJB/T7249199453.21compressibilityfacforZpV/RT3.22isolatedsystem3.23boundaryconditions()3.24thermalequilibrium3.25transientstate3.26steadystate3.27unsteadystate3.28enthalpypVpV3.29specificenthalpy3.30entropy3.31specificentropy3.32exergy3.33specificexergy3.34anergy3.35availableenergy3.36Mollierdiagram()3.37(p–h)pressureenthalpychartph3.38enthalpyentropychartJB/T7249199463.39(T-S)temperatureentropychart3.40psychrometricchart3.41(p-V)pressurevolumediagrampV3.42saturatedvapor3.43dry-saturatedvapor3.44superheatedvapor3.45quality3.46dryair3.47humidityratio()3.48humidity3.49absolutehumidity(0105Pa)3.50relativehumidity3.51oriticalpressure3.52saturationpressure3.53suctionpressure3.54dischargepressure3.55designworkingpressure3.56operatingpressureJB/T7249199473.57lowpressureside3.58highpressureside3.59pressureratio3.60pressuredrop3.61pressureequalizing3.62isothermalprocess3.63adiabatioprocess3.64polytropicprocesspvn=”pvn3.65throttling3.66expansion3.67adiabaticexpansion3.68polytropicexpansion3.69isenthalpicexpansion3.70multistageexpansion3.71re-expansionLine3.72compression3.73adiabaticcompression3.74polytropiccompressionJB/T7249199483.75wetcompression3.76compressionexponentpvn=”npv3.77single–stagecompression3.78multistagecompression3.79subcooling3.80degreeofsubcooling3.81superheat3.82degreeofsuperheat3.83chilling3.84intercooling3.85condensation3.86preheatinga.b.3.87precoolinga.b.3.88flashgas3.89noncondensablegas3.90corrosioninhibitorJB/T7249199493.91antifreezeagent()3.92moisturecontent3.93gaugepressure3.94staticpressure3.95velocitypressure3.96totalpressure3.97partialpressure3.98vacuum3.99evacuation3.100aspiration3.101velocityhead3.102concentration3.103solubility()3.104solvent3.105solute3.106absorption3.107adsorption3.108decomposition3.109hydrolysisJB/T72491994103.110diffusion3.111massdiffusivity3.112flameability3.113heattransfer3.114masstransfer3.115thermalradiation3.116thermalconduction3.117emissivity()3.118absorptance3.119transmittance3.120reflectance3.121directsolarradiationintensity3.122diffusesolarradiation3.123convection3.124freethermalconvection3.125forcedthermalconvection3.126parallelflowJB/T72491994113.127counterflow3.128cross–flow3.129thermaltransmittance3.130heattransferfilmcoefficient3.131thermalconductivity3.132finefficiency3.133thermalresistivity3.134scalefactor3.135heatexchangesurface3.136temperaturerise3.137temperaturedrop3.138temperaturegradient3.139meantemperature3.140temperaturedifference3.141meantemperaturedifference3.142arithmeticmeantemperaturedifference3.143logarithmicmeantemperaturedifference3.144amountofheatJB/T72491994123.145loada.b.3.146heatgain3.147heatloss3.148isobaricprocess44.1cycle4.2reversecycle4.3reversiblecycle4.4Carnotcycle4.5Braytoncycle4.6Stiringcycle4.7Rankinecycle4.8closedcycle4.9opencycle4.10refrigerationcycle4.11workcycle()4.12idealcycleofvaporcompressionrefrigerationmachineJB/T72491994134.13compressionrefrigerationcycle4.14airrefrigerationcycle4.15steamjetrefrigerationcycle4.16absorptionrefrigerationcycle4.17system4.18refrigeratingsystem4.19mechanicalrefrigeratingsystem4.20compressionrefrigeratingsystem4.21cascaderefrigeratingsystem4.22absorptionrefrigeratingsystem4.23steamjetrefrigeratingsystem4.24brinespraysystem4.25indirectsystemJB/T72491994144.26floodedsystem4.27liquidcoolingunit4.28refrigerationcircuit4.29()directmethodofrefrigeration(cooling)4.30()indirectmethodofrefrigeration(cooling)4.31refrigeratingcapacity4.32grossrefrigeratingcapacity4.33netrefrigeratingcapacity4.34refrigeratingcapacityperunitofsweptvolume4.35systemrefrigeratingcapacity4.36refrigeratingeffe