A guarded hot box procedure for determining the dynamic response of full-scale wall specimens - Part I

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TypeArticle
Journal titleASHRAE Transactions
ISSN0001-2505
Volume99
Issue1
Pages632642; # of pages: 11
SubjectWalls; Heat Transfer; Moisture performance; Murs; Transfert de chaleur
AbstractASHRAE Research Project 515 had the goal of producing measured values of the dynamic heat transmission characteristics of walls. The characteristics were measured in a guarded hot box facility. The facility, which conforms in general to that standardized by ASTM C236, measuresheat transfer through a 2440 mm X 2440 mm (8ft X 8ft) test area. Calorimeter temperatures are controllable between l6°C and 26°C (60°F and 80°F), and cold-side temperatures are controllable between 0°C and -40°C (32 °F and -40°F). Data acquisition and control are provided through a laboratory computer system. Dynamic calibration of the guarded hot box facility wasrequired before it could be used to measure dynamic heat transmission characteristics. This calibration was developed from first principles and supported by measurements of a 102 mm (4 in.) thick expanded polystyrene specimen whose thermal characteristics had been determined from measurements of material properties. To measure the dynamic heat transmission characteristics of wall specimens, a test and data reduction procedure was also developed from first principles. The validity of this procedure was confirmed with measurements of the dynamic heat transmission characteristics of a 203 mm (8 in.) thick cement mortar -- specimen whose thermal characteristics were determined from measurements of material properties.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
NotePaper presented at the ASHRAE Winter Meeting held in Chicago, IL, USA, January 23-27, 1993
Peer reviewedYes
IdentifierIRC-P-1786
NRC number34002
1902
NPARC number20377051
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Record identifier43772b59-1fb6-4bc4-bd58-df0106bde486
Record created2012-07-24
Record modified2016-05-09
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