A Comparison of Thermal Comfort of People from Buildings with Centralized Air-Conditioning Systems and Split Air-Conditioners
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A comparative study on thermal comfort of people from buildings with central air-conditioning system (CAC buildings) and split air-conditioner (SAC buildings) was conducted in climate chamber. The experimental conditions covered a wide thermal sensation range from cool to hot, and both physiological and psychological responses were collected. The results showed that the mean skin temperature was significantly higher for subjects from CAC buildings in the non-neutral conditions, while the skin wettednes was no significant difference between the two groups. The subjects from CAC and SAC buildings reported the same thermal sensations, and their neutral temperatures (26.8 and 26.6 °C) and thermal sensitivities (both 0.31 °C-1) were not significantly different as well. The 90% thermal acceptable SET ranges were 24.8–27.4 °C for subjects from CAC buildings and 24.4–30.1 °C for subjects from SAC buildings. The thermal acceptable upper limit was 2.7 °C lower for subjects from CAC buildings. The possible impacts of thermal history and expectation are discussed.
KeywordsAir-conditioner Thermal adaptation Thermal history Expectation
This work was supported by the National Nature Science Foundation of China [No. 51708228]; “The 13th Five-year” National Key R&D Program of China [No. 2018YFC0704500]; and State Key Laboratory of Subtropical Building Science, SCUT [No. 2019ZB16]. Thanks to the sixty subjects.
Informed Consent All subjects were informed of the experiment procedure and possible risks, experiments were carried out with their consent, and informed consent was obtained from all individual subjects. Experimental procedures performed in studies involving human participants were in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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