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The impacts of the thermal radiation field on thermal comfort, energy consumption and control - a critical overview

Halawa, Edward, van Hoof, Joost and Soebarto, Veronica (2014). The impacts of the thermal radiation field on thermal comfort, energy consumption and control - a critical overview. Renewable and Sustainable Energy Reviews,37:907-918.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 0 times in Scopus Article

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IRMA ID 84376995xPUB69
Title The impacts of the thermal radiation field on thermal comfort, energy consumption and control - a critical overview
Author Halawa, Edward
van Hoof, Joost
Soebarto, Veronica
Journal Name Renewable and Sustainable Energy Reviews
Publication Date 2014
Volume Number 37
ISSN 1364-0321   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-84902654539
Start Page 907
End Page 918
Total Pages 12
Place of Publication United Kingdom
Publisher Pergamon Press
HERDC Category C1 - Journal Article (DIISR)
Abstract Thermal comfort is determined by the combined effect of the six thermal comfort parameters: temperature, air moisture content, thermal radiation, air relative velocity, personal activity and clothing level as formulated by Fanger through his double heat balance equations. In conventional air conditioning systems, air temperature is the parameter that is normally controlled whilst others are assumed to have values within the specified ranges at the design stage. In Fanger’s double heat balance equation, thermal radiation factor appears as the mean radiant temperature (MRT), however, its impact on thermal comfort is often ignored. This paper discusses the impacts of the thermal radiation field which takes the forms of mean radiant temperature and radiation asymmetry on thermal comfort, building energy consumption and air-conditioning control. Several conditions and applications in which the effects of mean radiant temperature and radiation asymmetry cannot be ignored are discussed. Several misinterpretations that arise from the formula relating mean radiant temperature and the operative temperature are highlighted, coupled with a discussion on the lack of reliable and affordable devices that measure this parameter. The usefulness of the concept of the operative temperature as a measure of combined effect of mean radiant and air temperatures on occupant’s thermal comfort is critically questioned, especially in relation to the control strategy based on this derived parameter. Examples of systems which deliver comfort using thermal radiation are presented. Finally, the paper presents various options that need to be considered in the efforts to mitigate the impacts of the thermal radiant field on the occupants’ thermal comfort and building energy consumption.
Keywords Mean radiant temperature
Thermal radiant field
Radiant asymmetry
Thermal comfort tension
Thermal comfort
Heat balance model
Adaptive model
DOI http://dx.doi.org/10.1016/j.rser.2014.05.040   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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