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Experimental Evaluation of Radiant Heating Ceiling Systems Based on Thermal Comfort Criteria

Safizadeh, M. R. 1; Schweiker, Marcel 1; Wagner, Andreas ORCID iD icon 1
1 Institut Entwerfen und Bautechnik (IEB), Karlsruher Institut für Technologie (KIT)


Low-temperature radiant heating systems can be considered as suitable candidates for the refurbishment of old heating systems. These systems are proven to save energy, however, their drawback is their impact on the creation of radiant temperature asymmetry and local thermal discomfort, especially in old buildings where the temperatures of surfaces (for example external walls with a low level of insulation and large windows) are low. This study aims to evaluate the potential application of low-temperature radiant ceiling heating systems (28–38 °C) in old and energy-renovated buildings, based on subjective experiments and thermal comfort criteria such as thermal sensation, comfort, satisfaction, and sensation asymmetry votes. Later, in the Discussion section, the guideline for the radiant temperature asymmetry for the warm ceiling presented in ASHRAE Standard-55 is corrected for relatively low air temperatures and different surface temperatures corresponding to “about neutral” conditions for winter clothing. Findings of this research show that the radiant ceiling heating system operating at low temperatures (33–38 °C) can provide fairly neutral thermal sensation and satisfactory comfort at the majority of body-parts, if the building envelope satisfies advanced building energy-efficiency regulations. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000087380
Veröffentlicht am 12.11.2018
DOI: 10.3390/en11112932
Zitationen: 11
Web of Science
Zitationen: 8
Zitationen: 9
Cover der Publikation
Zugehörige Institution(en) am KIT Institut Entwerfen und Bautechnik (IEB)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2018
Sprache Englisch
Identifikator ISSN: 1996-1073
KITopen-ID: 1000087380
Erschienen in Energies
Verlag MDPI
Band 11
Heft 11
Seiten Article: 2932
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 26.10.2018
Schlagwörter radiant heating ceiling; radiant temperature asymmetry; thermal dissatisfaction; thermal comfort; subjective experiments
Nachgewiesen in Dimensions
Web of Science
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