Seasonal differences in human responses to increasing temperatures

Sachie Kitazawa, Rune Korsholm Andersen, Pawel Wargocki, Jakub Kolarik, Marcel Schweiker

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Experiments were conducted in late summer and winter with 80 young and elderly Danish subjects exposed for 3.5 hours in a climate chamber to the temperature increasing from 24°C to 35.2°C at a rate of 3.7K/h. Psychological and physiological measurements were performed during exposure and subjects assessed comfort and acute health symptoms. Thermal sensation increased with increasing chamber temperature and did not differ during late summer and winter exposures. Skin temperature increased with increasing temperature and was slightly but significantly higher in the late summer in the first half of exposure. Core temperature started to increase, when the chamber temperature reached about 28oC, earlier in winter than in the late summer. Thermal environment was assessed to be slightly less acceptable in winter only until chamber temperature reached about 28oC; acceptability systematically decreased with increasing temperature. Difficulty to concentrate increased with increased temperature and the self-estimated ability to perform work decreased; subjects reported being sleepier. Severity of headache and difficulty to concentrate was in winter slightly but systematically higher, subjects reporting also to be sleepier. Heart rate slightly increased during exposure, and SpO2 and ETCO2 began to decrease while core temperature started to increase. Performance of Tsai-partington test and addition test improved during exposures due to learning though lesser in winter. Results show negative effects of the temperature ramp, being somewhat higher in winter than in the late summer.
Original languageEnglish
Title of host publicationProceedings of Indoor Air 2014
Number of pages8
PublisherInternational Society for Indoor Air Quality and Climate (ISIAQ)
Publication date2014
Publication statusPublished - 2014
Event13th International Conference on Indoor Air Quality and Climate - University of Hong Kong, Hong Kong, Hong Kong
Duration: 7 Jul 201412 Jul 2014
Conference number: 13
http://www.indoorair2014.org/

Conference

Conference13th International Conference on Indoor Air Quality and Climate
Number13
LocationUniversity of Hong Kong
CountryHong Kong
CityHong Kong
Period07/07/201412/07/2014
Internet address

Bibliographical note

Topic A7: Thermal comfort

Keywords

  • Thermal comfort
  • Warmth
  • Performance
  • Physiological reaction
  • Symptoms

Cite this

Kitazawa, S., Andersen, R. K., Wargocki, P., Kolarik, J., & Schweiker, M. (2014). Seasonal differences in human responses to increasing temperatures. In Proceedings of Indoor Air 2014 International Society for Indoor Air Quality and Climate (ISIAQ).
Kitazawa, Sachie ; Andersen, Rune Korsholm ; Wargocki, Pawel ; Kolarik, Jakub ; Schweiker, Marcel. / Seasonal differences in human responses to increasing temperatures. Proceedings of Indoor Air 2014. International Society for Indoor Air Quality and Climate (ISIAQ), 2014.
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Kitazawa, S, Andersen, RK, Wargocki, P, Kolarik, J & Schweiker, M 2014, Seasonal differences in human responses to increasing temperatures. in Proceedings of Indoor Air 2014. International Society for Indoor Air Quality and Climate (ISIAQ), 13th International Conference on Indoor Air Quality and Climate, Hong Kong, Hong Kong, 07/07/2014.

Seasonal differences in human responses to increasing temperatures. / Kitazawa, Sachie; Andersen, Rune Korsholm; Wargocki, Pawel; Kolarik, Jakub; Schweiker, Marcel.

Proceedings of Indoor Air 2014. International Society for Indoor Air Quality and Climate (ISIAQ), 2014.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

TY - GEN

T1 - Seasonal differences in human responses to increasing temperatures

AU - Kitazawa, Sachie

AU - Andersen, Rune Korsholm

AU - Wargocki, Pawel

AU - Kolarik, Jakub

AU - Schweiker, Marcel

N1 - Topic A7: Thermal comfort

PY - 2014

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AB - Experiments were conducted in late summer and winter with 80 young and elderly Danish subjects exposed for 3.5 hours in a climate chamber to the temperature increasing from 24°C to 35.2°C at a rate of 3.7K/h. Psychological and physiological measurements were performed during exposure and subjects assessed comfort and acute health symptoms. Thermal sensation increased with increasing chamber temperature and did not differ during late summer and winter exposures. Skin temperature increased with increasing temperature and was slightly but significantly higher in the late summer in the first half of exposure. Core temperature started to increase, when the chamber temperature reached about 28oC, earlier in winter than in the late summer. Thermal environment was assessed to be slightly less acceptable in winter only until chamber temperature reached about 28oC; acceptability systematically decreased with increasing temperature. Difficulty to concentrate increased with increased temperature and the self-estimated ability to perform work decreased; subjects reported being sleepier. Severity of headache and difficulty to concentrate was in winter slightly but systematically higher, subjects reporting also to be sleepier. Heart rate slightly increased during exposure, and SpO2 and ETCO2 began to decrease while core temperature started to increase. Performance of Tsai-partington test and addition test improved during exposures due to learning though lesser in winter. Results show negative effects of the temperature ramp, being somewhat higher in winter than in the late summer.

KW - Thermal comfort

KW - Warmth

KW - Performance

KW - Physiological reaction

KW - Symptoms

M3 - Article in proceedings

BT - Proceedings of Indoor Air 2014

PB - International Society for Indoor Air Quality and Climate (ISIAQ)

ER -

Kitazawa S, Andersen RK, Wargocki P, Kolarik J, Schweiker M. Seasonal differences in human responses to increasing temperatures. In Proceedings of Indoor Air 2014. International Society for Indoor Air Quality and Climate (ISIAQ). 2014