Conference Editor

Jianshun Zhang; Edward Bogucz; Cliff Davidson; Elizabeth Krietmeyer

Location

Syracuse, NY

Event Website

http://ibpc2018.org/

Start Date

26-9-2018 10:30 AM

End Date

26-9-2018 12:00 PM

Description

In cold and moderate climates, poorly designed construction joints can lead to local low surface temperatures, which entails local radiant asymmetry. An experiment was set up to test the hypothesis that overall and local thermal sensation is influenced by temperature difference, and position and distance of local radiant asymmetry. In the experiment, 18 subjects participated where they were introduced in a room at 21°C and 45% relative humidity. The subjects were exposed to local radiant asymmetry created by a cooling plate. This plate was positioned at three different heights, and controlled for temperatures at 3, 6 or 10°C below room air temperature. The data was analyzed using general linear modelling. The results show that thermal sensation is not influenced by local radiant asymmetry directly, but that the deviation from base comfort level is linked to height and temperature of the cold plate, as well as distance of the plate to the subject. This last effect proved to be the strongest. Contrary to what was expected however, participants felt warmer when exposed to local radiant cooling, compared to when not exposed to it. Further research is needed to determine the cause of this effect.

Comments

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DOI

https://doi.org/10.14305/ibpc.2018.ie-6.05

Creative Commons License

Creative Commons Attribution-Noncommercial 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 4.0 License.

COinS
 
Sep 26th, 10:30 AM Sep 26th, 12:00 PM

The effect of the position and temperature difference of local radiant asymmetry on thermal comfort: an experimental investigation

Syracuse, NY

In cold and moderate climates, poorly designed construction joints can lead to local low surface temperatures, which entails local radiant asymmetry. An experiment was set up to test the hypothesis that overall and local thermal sensation is influenced by temperature difference, and position and distance of local radiant asymmetry. In the experiment, 18 subjects participated where they were introduced in a room at 21°C and 45% relative humidity. The subjects were exposed to local radiant asymmetry created by a cooling plate. This plate was positioned at three different heights, and controlled for temperatures at 3, 6 or 10°C below room air temperature. The data was analyzed using general linear modelling. The results show that thermal sensation is not influenced by local radiant asymmetry directly, but that the deviation from base comfort level is linked to height and temperature of the cold plate, as well as distance of the plate to the subject. This last effect proved to be the strongest. Contrary to what was expected however, participants felt warmer when exposed to local radiant cooling, compared to when not exposed to it. Further research is needed to determine the cause of this effect.

https://surface.syr.edu/ibpc/2018/IE6/5

 

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