CopyrightedmateriallicensedtoStanfordUniversitybyThomsonScientific(www.techstreet.com),downloadedonOct-05-2010byStanfordUniversityUser.Nofurtherreproductionordistributionispermitted.UncontrolledwhenAIRASMEPTC30-1991SymbolDefinjtion~~~~DimensionsU.S.CustomaryUnitsSIUnitsLMTDNNNhNmMUNuPPPPrQrRRR"R.ReRPMSSSCFMSttTT,UVWLogmeantemperaturedifferenceNumberoftubesNumberofmeasurementsNumberoffinsperunitlengthFanspeedNumberoftransferunitsNusseltnumber,hD/kAirpressureThermaleffectiveness,(t,-tJ/F,-tJProcessstreampressurePrandtlnumber,c,,rJkHeattransferrateRadiusTemperaturedifferenceratioequalto(T,-T&-t,)ThermalresistanceHydraulicradiusGasconstantofairReynoldsnumber,GD/pRotationalspeedNetcleardistancebetweenfinsCrosssectionalflowarea"FDimensionlessDimensionlessft-'RPMDimensionlessDimensionlessIbf/ftaDimensionlessIbf/ft'DimensionlessBtuhrftDimensionlesshrft'."F/Btuft53.32ft*lbf/lbm"RDimensionlessRevolutionsperminuteftft2"CDimensionlessDimensionlessm-'rPsDimensionlessDimensionlessPaDimensionlessPaDimensionlessWrnDimensionlessmZWWm286.9JkgKDimensionlessmm2Standardcubicfeetperminutemeasuredatft3/min70°Fand14.696psia,dryairStantonnumber,hlc,C=-NuRePrDimensionlessDimensionlessAirtemperature"F"CProcessfluidtemperatureOF"CTorqueIbf-ftN.mOverallheattransfercoefficientBtu/hrft'*'FW/ma."CSpeedWminm/SAirflowrateIbm/hrkds9CopyrightedmateriallicensedtoStanfordUniversitybyThomsonScientific(www.techstreet.com),downloadedonOct-05-2010byStanfordUniversityUser.Nofurtherreproductionordistributionispermitted.UncontrolledwhAirCooledHeatExchangersASMEPTC30-1991PERFORMANCETEST~ANAMERICANNATIONALSTANDARDTHEAMERICANSOCIETY,OFMECHANICALENGINEERSUnitedEngineeringCenter345East47thStreetNewYork,N.Y.10017CopyrightedmateriallicensedtoStanfordUniversitybyThomsonScientific(www.techstreet.com),downloadedonOct-05-2010byStanfordUniversityUser.Nofurtherreproductionordistributionispermitted.UncontrolledwDateofIssuance:May30,1991The1991editionofthisdocumentisbeingissuedwithanautomaticaddendasubscriptionservice.Th...
