Investigation of Dynamic Thermal Comfort and Air Velocity Preference in Different Transient Environments in Summer

  • Ge Yao
  • Nianping LiEmail author
  • Zhibin Wu
  • Chang Xu
  • Jing Zhang
Conference paper
Part of the Environmental Science and Engineering book series (ESE)


This research mainly focused on investigating dynamic thermal comfort in transient environments with desk fans. An experiment was conducted during the summer of 2018 in Changsha City. Three step change conditions (34–26–34 °C, 34–28–34 °C, 34–30–34 °C) were conducted with 20 subjects in a chamber room. Subjects can freely adjust desk fans in indoor conditions (26, 28, 30 °C). Thermal perceptions were responded, and physical variables were recorded simultaneously. The results show that overshoot in thermal sensations occurs after temperature down-step change and does not occur after up-step. The steady values of the thermal sensations after up-step change were lower than those in the previous environment before down-step, indicating that thermal sensation is affected by thermal experience before step change. Thermal sensation approached stability more quickly with the desk fan. Air movement preference varied over time and discrepancy occurred between the condition after heating and before cooling exposure. Additionally, desk fans could significantly improve thermal comfort of the subjects after step change.


Transient environment Thermal sensation Thermal comfort Desk fans Air velocity preference 



The project is supported by the National Natural Science Foundation of China (Number 51878255).

Consents Informed consent was obtained from all individual subjects before the experiment. All subjects agreed to participate in the test and fill in the questionnaire.


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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  • Ge Yao
    • 1
  • Nianping Li
    • 1
    Email author
  • Zhibin Wu
    • 1
  • Chang Xu
    • 1
  • Jing Zhang
    • 1
  1. 1.College of Civil EngineeringHunan UniversityChangshaChina

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