_STP_544-1980.pdf

Copyright by ASTM Intl(all rights reserved);Fri Jan 1 23:12:22 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.HEAT TRANSMISSION MEASUREMENTS IN THERMAL INSULATIONS A symposium sponsored by ASTM Committee C-16 on Thermal and Cryogenic Insulating Materials AMERICAN SOCIETY FOR TESTING AND MATERIALS Philadelphia,Pa.,16-17 April 1973 ASTM SPECIAL TECHNICAL PUBLICATION 544 R.P.Tye,symposium chairman List price$30.75 04-544000-10 AMERICAN SOCIETY FOR TESTING AND MATERIALS 1916 Race Street,Philadelphia,Pa.19103 Copyright by ASTM Intl(all rights reserved);Fri Jan 1 23:12:22 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.by American Society for Testing and Materials 1974 Library of Congress Catalog Card number:73-87351 NOTE The Society is not responsible,as a body,for the statements and opinions advanced in this publication.Printed in Baltimore,Maryland June,1974 Printed in Philadelphia,Pennsylvania Second Printing,January,1980 Copyright by ASTM Intl(all rights reserved);Fri Jan 1 23:12:22 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Foreword The Symposium on Contributions of Basic Heat Transmission Measurements to the Design and Behavior of Thermal Insulation Systems was held at the American Society for Testing and Materials Headquarters in Philadelphia,Pa.,on 16-17 April 1973.The symposium was sponsored by ASTM Committee C-16 on Thermal and Cryogenic Insulating Materials.R.P.Tye,Dynatech R/D Company,presided as the symposium chairman.Copyright by ASTM Intl(all rights reserved);Fri Jan 1 23:12:22 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Related ASTM Publications Thermal Insulating Covers for NPS Piping,Vessel Lagging and Dished Head Segments.ASTM Recommended Practice for Prefabrication and Field Fabri-cation of-C 450 adjunct(1965),$4.25,12-304500-00 Manual on the Use of Thermocouples in Temperature Measurement,STP 470A(1974),$17.50.04-470010-40 Copyright by ASTM Intl(all rights reserved);Fri Jan 1 23:12:22 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Contents Introduction 1 Definitions and Thermal Modelling What Property Do We Measure-TM Subcommittee CI 6.30 5 Measurement Philosophy of Subcommittee CI 6-30 5 Heat Transfer 7 The Necessity of Multiple Measurements 9 Recommendations for Future Changes 11 Establishing Steady-State Thermal Conditions in Flat Slab Specimens-C.J.Shirtliffe 13 Basic Problem 15 Common Factors in Models 15 Model Descriptions and Solutions 15 Simplification of Solutions 16 Truncation of Solutions 17 Inversion of the Solutions 22 Comparison of Settling Times 23 Accuracy of Equations 24 Conclusions 24 Mechanisms of Heat Transfer in Permeable Insulation and Their Investi-gation in a Special Guarded Hot PlateC.G.Bankvall 34 Measurement of Heat Transfer 35 The Guarded Hot Plate 35 Heat Transfer Mechanisms in Fibrous Insulation 40 The Natural Convective Heat Transfer 43 Summary 48 Water Vapor Diffusion and Frost in Porous Materials.A uracher 49 Diffusion in Porous Frost-Containing Materials 50 Diffusion on Simple,Frost-Containing Pore Models 51 Diffusion in Frost-Containing Sphere Packings 61 Discussion 66 Conclusion 67 Radiative Contribution to the Thermal Conductivity of Fibrous Insula-tions-i?.M.F.Linford,R.J.Schmitt,and T.A.Hughes 68 Nomenclature 69 Theoretical Models for Radiant Heat Transfer 70 Experimental Approach 75 Experimental Results 78 Calculation of the Radiation Transmission Component 82 Conclusions 83 Predicting Spacecraft Multilayer Insulation Performance from Heat Trans-fer MeasurementsI.D.Stimpson and W.A.Hagemeyer 85 System-Level MLI Blanket Results 87 Types of Calorimeters Used 89 The JPL Test Program 90 Copyright by ASTM Intl(all rights reserved);Fri Jan 1 23:12:22 EST 2016Downloaded/printed byUniversity of Washington(University of Washington)pursuant to License Agreement.No further reproductions authorized.Discussion of Future MLI Requirements 92 Conclusions 92 Techniques Design Criteria for Guarded Hot Plate Apparatus-F.De Ponte and P.Di Filippo 97 The Guarded Hot Plate 99 The Cold Plate 109 Conclusions 116 Suitable Steady-State Methods for Measurement of Effective Thermal Conductivity in Rigid Insulations-IV.T.Engelke 118 Comparative Rod Apparatus 120 Radial Inflow Apparatus 126 Application 129 Conclusions 133 Thermal Conductance of Pipe InsulationA Large-Scale Test Apparatus L.R.Kimball 135 Test Procedure 136 Selected Experimental Results 140 Discussion 142 Conclusions 146 New Development in Design of Equipment for Measuring Thermal Conductivity and Heat Flow-is.Brendeng and P.E.Fri