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ASTM C680-04e2

(Practice)

Standard Practice for Estimate of the Heat Gain or Loss and the Surface Temperatures of Insulated Flat, Cylindrical, and Spherical Systems by Use of Computer Programs

Standard Practice for Estimate of the Heat Gain or Loss and the Surface Temperatures of Insulated Flat, Cylindrical, and Spherical Systems by Use of Computer Programs

SCOPE
1.1 This practice provides the algorithms and calculation methodologies for predicting the heat loss or gain and surface temperatures of certain thermal insulation systems that can attain one dimensional, steady- or quasi-steady-state heat transfer conditions in field operations.
1.2 This practice is based on the assumption that the thermal insulation systems can be well defined in rectangular, cylindrical or spherical coordinate systems and that the insulation systems are composed of homogeneous, uniformly dimensioned materials that reduce heat flow between two different temperature conditions.
1.3 Qualified personnel familiar with insulation-systems design and analysis should resolve the applicability of the methodologies to real systems. The range and quality of the physical and thermal property data of the materials comprising the thermal insulation system limit the calculation accuracy. Persons using this practice must have a knowledge of the practical application of heat transfer theory relating to thermal insulation materials and systems.
1.4 The computer program that can be generated from the algorithms and computational methodologies defined in this practice is described in Section of this practice. The computer program is intended for flat slab, pipe and hollow sphere insulation systems. An executable version of a program based on this standard may be obtained from ASTM.
1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
30-Apr-2004
Technical Committee
C16 - Thermal Insulation
Drafting Committee
C16.30 - Thermal Measurement
Current Stage
Ref Project

Relations

Replaced By
ASTM C680-04e3 - Standard Practice for Estimate of the Heat Gain or Loss and the Surface Temperatures of Insulated Flat, Cylindrical, and Spherical Systems by Use of Computer Programs
Effective Date
01-May-2006

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ASTM C680-04e2 - Standard Practice for Estimate of the Heat Gain or Loss and the Surface Temperatures of Insulated Flat, Cylindrical, and Spherical Systems by Use of Computer ProgramsASTM C680-04e2 - Standard Practice for Estimate of the Heat Gain or Loss and the Surface Temperatures of Insulated Flat, Cylindrical, and Spherical Systems by Use of Computer Programs
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ASTM C680-04e2 - Standard Practice for Estimate of the Heat Gain or Loss and the Surface Temperatures of Insulated Flat, Cylindrical, and Spherical Systems by Use of Computer Programs
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Standards Content (Sample)

e2
Designation: C 680 – 04
Standard Practice for
Estimate of the Heat Gain or Loss and the Surface
Temperatures of Insulated Flat, Cylindrical, and Spherical
1
Systems by Use of Computer Programs
This standard is issued under the fixed designation C680; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1
e NOTE—Footnote 3 was editorially revised in November 2004.
2
e NOTE—Table A1.1 was editorially corrected in August 2005.
1. Scope 1.6 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This practice provides the algorithms and calculation
responsibility of the user of this standard to establish appro-
methodologies for predicting the heat loss or gain and surface
priate safety and health practices and determine the applica-
temperatures of certain thermal insulation systems that can
bility of regulatory limitations prior to use.
attain one dimensional, steady- or quasi-steady-state heat
transfer conditions in field operations.
2. Referenced Documents
1.2 Thispracticeisbasedontheassumptionthatthethermal
2
2.1 ASTM Standards:
insulation systems can be well defined in rectangular, cylindri-
C168 Terminology Relating to Thermal Insulating Materi-
cal or spherical coordinate systems and that the insulation
als
systems are composed of homogeneous, uniformly dimen-
C177 Test Method for Steady-State Heat Flux Measure-
sioned materials that reduce heat flow between two different
ments and Thermal Transmission Properties by Means of
temperature conditions.
the Guarded Hot Plate Apparatus
1.3 Qualified personnel familiar with insulation-systems
C335 Test Method for Steady-State Heat Transfer Proper-
design and analysis should resolve the applicability of the
ties of Horizontal Pipe Insulation
methodologies to real systems. The range and quality of the
C518 Test Method for Steady-State Heat Flux Measure-
physical and thermal property data of the materials comprising
ments and Thermal Transmission Properties by Means of
the thermal insulation system limit the calculation accuracy.
the Heat Flow Meter Apparatus
Persons using this practice must have a knowledge of the
C585 Practice for Inner and Outer Diameters of Rigid
practical application of heat transfer theory relating to thermal
Thermal Insulation for Nominal Sizes of Pipe and Tubing
insulation materials and systems.
(NPS System)
1.4 The computer program that can be generated from the
C1055 Guide for Heated System Surface Conditions That
algorithms and computational methodologies defined in this
Produce Contact Burn Injuries
practiceisdescribedinSection7ofthispractice.Thecomputer
C1057 Practice for Determination of Skin Contact Tem-
program is intended for flat slab, pipe and hollow sphere
perature from Heated Surfaces Using a Mathematical
insulation systems.An executable version of a program based
Model and Thermesthesiometer
on this standard may be obtained from ASTM.
2.2 Other Document:
1.5 Thevaluesstatedininch-poundunitsaretoberegarded
NBS Circular 564 Tables of Thermodynamic and Transport
as the standard. The values given in parentheses are for
Properties of Air, U.S. Dept of Commerce
information only.
2.3 ASTM Adjuncts:
ADJC0680 Practice for Estimate of the Heat Gain or Loss
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal
2
Insulation and is the direct responsibility of Subcommittee C16.30 on Thermal For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Measurements. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved May 1, 2004. Published June 2004. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1971. Last previous edition approved in 2003 as C680-03a. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
Copyright by ASTM Int'l (all rights reserved);
Reproduction authorized per License Agreement with Kathe Hooper (ASTMIHS Account); Mon Sep 12 13:22:53 EDT 2005

---------------------- Page: 1 ----------------------
e2
C680–04
and the Surface Temperatures of Insulated Flat, Cylindri-
b = volumetric thermal expansion coefficient of ambient
-1 -1
cal, and Spherical Systems by Use of Computer Pro-
fluid, °R (K )
3 3 3
grams
r = density of ambient fluid, lb/ft (kg/m )
DT = absolute value of temperature difference between
3. Terminology
surface and ambient fluid, °R (K)
Nu = Nusselt number, dimensionless
3.1 Definitions—For definitions of terms used in this prac-
Ra = Rayleith number, dimensionless
tice, refer to Terminology C168.
Re = Reynolds number, dimensionless
3.1.1 thermal insulation system—forthispractice,athermal
Pr = Prandt
...

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