Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.buildenv.2019.03.030
Title: Effects of temperature, air movement and initial metabolic rate on thermal sensation during transient state in the tropics
Authors: Mihara, Kuniaki
Sekhar, Chandra 
Kwok, Wai Tham 
Takemasa, Yuichi
Lasternas, Bertrand 
Keywords: Science & Technology
Technology
Construction & Building Technology
Engineering, Environmental
Engineering, Civil
Engineering
Tropical climate
Elevated air movement
Thermal comfort
Tropically acclimatized subjects
Transient phase
CEILING FANS
COMFORT
STEPS
RESPONSES
VELOCITY
QUALITY
SYSTEM
WARM
Issue Date: 15-May-2019
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Citation: Mihara, Kuniaki, Sekhar, Chandra, Kwok, Wai Tham, Takemasa, Yuichi, Lasternas, Bertrand (2019-05-15). Effects of temperature, air movement and initial metabolic rate on thermal sensation during transient state in the tropics. BUILDING AND ENVIRONMENT 155 : 70-82. ScholarBank@NUS Repository. https://doi.org/10.1016/j.buildenv.2019.03.030
Abstract: The effects of temperature, air movement and initial metabolic rate on transient thermal sensation at warm temperatures and high humidity among tropically acclimatized people were investigated. 26 tropically acclimatized subjects (13 males and 13 females) participated in the experiments with two different initial metabolic rates at temperatures of 24, 27 and 30 °C, relative humidity (RH) of 60% and air velocities ranging from 0.07 to 1.87 m/s. All the subjects participated in 18 sessions, each for 3.5 h. Thermal sensation in the first few minutes after entering the room moderated earlier with elevated air movement. Thermal sensation, thermal comfort and thermal acceptability reached steady-state within 15 and 25 min respectively at 27 and 30 °C with elevated air movement up to 1.87 m/s even at high initial metabolic rates. Air movement, temperature and initial metabolic rate had a great impact on immediate change in thermal sensation, comfort and acceptability after entry into an air-conditioned room from an outdoor environment. Thermal comfort was highly correlated with thermal sensation during the transient phase and it was observed that a much cooler thermal sensation than in steady-state was necessary for optimal thermal comfort during the transient state. When the initial metabolic rate decreased, the preferred thermal sensation for tropically acclimatized people showed a noticeable shift from cool (−1.87) to slightly cool (−0.77).
Source Title: BUILDING AND ENVIRONMENT
URI: https://scholarbank.nus.edu.sg/handle/10635/200477
ISSN: 03601323
1873684X
DOI: 10.1016/j.buildenv.2019.03.030
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