Modeling and Simulation of Human Body Heat Transfer System Based on Air Space Values in 3D Clothing Model

Abstract

Comfort can be considered as subjective feeling, which could be affected by the external ambient, by the physical activity, and by clothing. Considering the human body heat transfer system, it mainly depends on various parameters including clothing materials, external and internal environment, etc. The purpose of the current paper is to study and establish a quantitative relationship between one of the clothing parameters, ease allowance (air gap values) and the heat transfer through the human body to clothing materials and then to the environment. The study considered clothing which is integrated with the 3D ease allowance from the anthropometric and morphological data. Such incorporating of the clothing’s 3D ease control was essential to properly manage the air space between the body and the proposed clothing thermal regulation model. In the context of thermal comfort, a clothing system consisting of the human body, an ease allowance under clothing, a layer of textile materials, and a peripheral layer adjacent to the textile material was used. For the complete system, the heat transfer from the skin to the environment, which is influenced by thermoregulation of the human body, air gap, tissue, and environmental conditions were also considered. To model and predict the heat transfer between the human body and the temperature of skin and clothes, a 3D adaptive garment which could be adjusted with ease allowance was used. In the paper, a thermoregulatory model was developed and proposed to predict the temperature and heat within clothing material, skin, and air space. Based on the result, in general the main difference in the temperature of clothing and skin from segment to segment is due to the uneven distribution of air layers under the clothing.

Measurement Methods of the Thermal Resistance of Materials Used in Clothing

“…These systems are used to measure steady-state maintenance performance. Sensors (15) between layers measure differential temperature with assembly (16), measurement base temperature with assembly (17), and measurement base temperature with assembly (18). The data is entered into the computer (19), which contains software for calculating the thermal properties of samples in the relaxed or compressed state.…”

“…This review is divided into three major sections: (I) papers dealing with air in textile fabrics, between layers of integrated textile materials, between layers of integrated textile materials and the human body, and with the airflow in the microclimate of the garment relative to the ambient air [ 8 , 9 , 10 ]; (II) published research on clothing design issues, including body posture, clothing fit, and the availability and effectiveness of clothing fasteners and openings [ 12 , 13 , 14 , 15 , 16 ]; (III) influence of air flow (wind) in the environment on body movements [ 17 , 18 ].…”

Pengaruh Pemberian Kompres Hangat terhadap Penurunan Suhu Tubuh pada Anak yang Terkena Typhoid Fever

“…Pemberian kompres hangat pada daerah aksila dapat menurunkan suhu tubuh hal ini terjadi karena di daerah aksila terdapat banyak pembuluh darah yang akan mengalami vasodilatasi. Vasodolatasi yang kuat pada kulit memungkinkan percepatan perpindahan panas dari tubuh ke kulit sebanyak delapan kali lipat (Mosleh et al, 2021).…”

Determining patterns of the influence of low temperatures of the external environment on head protection for a mountain rescuer

“…An option to overcome the corresponding difficulties associated with the impact on the rescuer's health of low temperature may be to optimize his work time. This approach is used in [5], but the modeling of heat and mass transfer in the human body was carried out without experimental research.…”