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Air movement and thermal comfort in hot-humid environments(1):Without occupant control

Zhai Yongchao;Zhang Yufeng;Meng Qinglin;Zhang Hui;Pasut Wilmer;Arens Edward;State Key Laboratory of Subtropical Building,South China University of Technology;  
Experiments on the thermal responses of 16subjects from China exposed to the environment with fixed air movement from ceiling fans at three levels of temperature(26,28,30℃)and two levels of relative humidity(RH)(60% and 80%)by questionnaire.Results show that the air movement from fixed ceiling fan can markedly improve occupant comfort in hot-humid environment,and the thermal comfort can be maintained up to 30 ℃ and 80%,and the preferred air speed increases while air temperature and humid improves.The maximum preferred air speed is 1.6 m/s,much higher than the upper limit by ASHRAE Standard 55.
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