ASTM_D_7863_-_17.pdf

Designation:D786317Standard Guide forEvaluation of Convective Heat Transfer Coefficient ofLiquids1This standard is issued under the fixed designation D7863;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This guide covers general information,without specificlimits,for selecting methods for evaluating the heating andcooling performance of liquids used to transfer heat whereforced convection is the primary mode for heat transfer.Further,methods of comparison are presented to effectivelyand easily distinguish performance characteristics of the heattransfer fluids.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D445 Test Method for Kinematic Viscosity of Transparentand Opaque Liquids(and Calculation of Dynamic Viscos-ity)D1298 Test Method for Density,Relative Density,or APIGravity of Crude Petroleum and Liquid Petroleum Prod-ucts by Hydrometer MethodD2270 Practice for Calculating Viscosity Index from Kine-matic Viscosity at 40 C and 100 CD2717 Test Method for Thermal Conductivity of LiquidsD2766 Test Method for Specific Heat of Liquids and SolidsD2879 Test Method for Vapor Pressure-Temperature Rela-tionship and Initial Decomposition Temperature of Liq-uids by IsoteniscopeD2887 Test Method for Boiling Range Distribution of Pe-troleum Fractions by Gas ChromatographyD4052 Test Method for Density,Relative Density,and APIGravity of Liquids by Digital Density MeterD4530 Test Method for Determination of Carbon Residue(Micro Method)D6743 Test Method for Thermal Stability of Organic HeatTransfer FluidsD7042 Test Method for Dynamic Viscosity and Density ofLiquids by Stabinger Viscometer(and the Calculation ofKinematic Viscosity)E659 Test Method for Autoignition Temperature of Chemi-cals3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 heat transfer fluid,na fluid which remains essen-tially a liquid while transferring heat to or from an apparatus orprocess,although this guide does not preclude the evaluation ofa heat transfer fluid that may be used in its vapor state.3.1.1.1 DiscussionHeat transfer fluids may be hydrocar-bon or petroleum based such as polyglycols,esters,hydroge-nated terphenyls,alkylated aromatics,diphenyl-oxide/biphenylblends,and mixtures of di-and triaryl-ethers.Small percent-ages of functional components such as antioxidants,anti-wearandanti-corrosionagents,TBN,acidscavengers,ordispersants,or a combination thereof,can be present.3.1.2 heat transfer coeffcient,na term,h,used to relatethe amount of heat transfer per unit area at a given temperaturedifference between two media and for purposes of this guide,the temperature difference is between a flow media and itssurrounding conduit.3.1.2.1 DiscussionThe heat transfer coefficient for condi-tions applicable to fluids flowing in circular conduits underturbulent flow is referred to as the convective heat transfercoefficient.1This guide is under the jurisdiction of ASTM Committee D02 on PetroleumProducts,Liquid Fuels,and Lubricants and is the direct responsibility of Subcom-mittee D02.L0.06 on Non-Lubricating Process Fluids.Current edition approved Aug.1,2017.Published August 2017.Originallyapproved in 2013.Last previous edition approved in 2013 as D7863 13.DOI:10.1520/D7863-17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 4.Summary of Guide4.1 The convective heat transfer coefficient for flow in acircul