Form Approved
REPORT DOCUMENTATION PAGE
OMB No. 0704-0188
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1. AGENCY USE ONLY (Leave blank)
2. REPORT DATE
3. REPORT TYPE AND DATES COVERED
June 1999
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Two-Dimensional Analysis of Natural Convection and
Radiation in Utilidors
PE: 4A762784AT42
PR: 6.27.84A
TA: M
6. AUTHORS
WU: 07
Paul W. Richmond
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
8. PERFORMING ORGANIZATION
REPORT NUMBER
U.S. Army Cold Regions Research and Engineering Laboratory
72 Lyme Road
CRREL Report 99-7
Hanover, New Hampshire 03755-1290
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSORING/MONITORING
AGENCY REPORT NUMBER
Office of the Chief of Engineers
DoD HPC Center
Washington, DC 20314-1000
Arctic Region Supercomputing Center
11. SUPPLEMENTARY NOTES
For conversion of SI units to non-SI units of measurement, consult ASTM Standard E380-93, Standard Practice for Use of the
International System of Units, published by the American Society for Testing and Materials, 1916 Race St., Philadelphia, Pa.
19103.
12a. DISTRIBUTION/AVAILABILITY STATEMENT
12b. DISTRIBUTION CODE
Approved for public release; distribution is unlimited.
Available from NTIS, Springfield, Virginia 22161
A13. ABSTRACT (Maximum 200 words)
Central heating plants are often used on large building complexes such as university campuses or military bases.
Utilidors can be used to contain heat distribution lines and other utilities between a utility station and serviced
buildings. Traditional thermal analysis of utilidors is one-dimensional, with heat transfer correlations used to
estimate the effects of convection, radiation, and two-dimensional geometric effects. The expanding capabilities
of computers and numerical methods suggest that more detailed analysis and possibly more energy-efficient
designs could be obtained. This work examines current methods of estimating the convection and radiation that
occur across an air space in square and rectangular enclosures and compares them with numerical and experi-
mental data.
Central heat distribution
Radiation and convection
14. SUBJECT TERMS
15. NUMBER OF PAGES
78
Effective conductivity
Utilidors
Enclosures
Utilities
16. PRICE CODE
Numerical heat transfer
17. SECURITY CLASSIFICATION
18. SECURITY CLASSIFICATION
19. SECURITY CLASSIFICATION
20. LIMITATION OF ABSTRACT
OF REPORT
OF THIS PAGE
OF ABSTRACT
UNCLASSIFIED
UNCLASSIFIED
UNCLASSIFIED
UL
NSN 7540-01-280-5500 Go to Contents
Standard Form 298 (Rev. 2-89)
Prescribed by ANSI Std. Z39-18
298-102
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