Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 53 Issue 1 (Special Issue) 2021 03 21 Effect of Gender and Body Fitness on the Thermal Sensation of Sleeping Occupants Under Task-Ambient Air Conditioning System Effect of Gender and Body Fitness on the Thermal Sensation of Sleeping Occupants Under Task-Ambient Air Conditioning System 453 466 3532 10.22060/mej.2019.15664.6178 FA Ali Foadaddini PhD student, Mechanical engineering, University of Birjand Farzin Davoodi PhD student, Mechanical engineering, University of Birjand Seyed Mohammad Hooshmand University of Birjand Alireza Zolfaghari University of Birjand 0000-0001-9917-3400 Hasan Hassanzadeh University of Birjand Journal Article 2019 01 18 Providing thermal comfort conditions in a sleeping environment can significantly affect the occupants’ health. So, the parameters of the air conditioning system must be properly set to satisfy thermal comfort criteria for persons with different physiological characteristics. In the present study, a task/ambient air conditioning system is modeled and the effect of gender and body mass index on the thermal sensation has been analyzed by an individualized three-node model. Results show that although Gagge standard model predicts pleasant thermal comfort condition, thermal sensation index varies from -0.63 to 0.66 based on the individualized three-node model, and in some cases exceed the thermal comfort region. Moreover, healthy and fat people have a warm sensation in clothed parts of the body and underweight people, especially women, have a cold sensation in bare parts of the body. Also, based on the results of women compared with men, and underweight people compared with overweight people feel colder. <span class="tlid-translation">By changing </span>body mass index<span class="tlid-translation">, the thermal sensation index can change up to 0.36, which is very significant in the assessment of thermal comfort.</span> Providing thermal comfort conditions in a sleeping environment can significantly affect the occupants’ health. So, the parameters of the air conditioning system must be properly set to satisfy thermal comfort criteria for persons with different physiological characteristics. In the present study, a task/ambient air conditioning system is modeled and the effect of gender and body mass index on the thermal sensation has been analyzed by an individualized three-node model. Results show that although Gagge standard model predicts pleasant thermal comfort condition, thermal sensation index varies from -0.63 to 0.66 based on the individualized three-node model, and in some cases exceed the thermal comfort region. Moreover, healthy and fat people have a warm sensation in clothed parts of the body and underweight people, especially women, have a cold sensation in bare parts of the body. Also, based on the results of women compared with men, and underweight people compared with overweight people feel colder. <span class="tlid-translation">By changing </span>body mass index<span class="tlid-translation">, the thermal sensation index can change up to 0.36, which is very significant in the assessment of thermal comfort.</span> https://mej.aut.ac.ir/article_3532_afab3e9707435d6b0888b566d7ad3ff8.pdf