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Title: Measurement of human body surface heat flux using a calorimetric sensor
Authors: Rodriguez de Rivera, Pedro Jesus 
Rodriguez de Rivera, Miriam 
Socorro, Fabiola 
Rodríguez de Rivera, Manuel 
UNESCO Clasification: 2213 Termodinámica
Keywords: Skin Temperature
Issue Date: 2019
Journal: Journal of Thermal Biology 
Abstract: We have developed a calorimetric sensor that can perform local measurements of the heat flux transmitted by conduction between a human body and thermostat located inside the sensor. The sensor has a detection area of 2 x 2 cm(2) and, in its current configuration, facilitates measurement with a resolution of 10 mW. In this paper, measurements of two healthy male subjects of different ages (24 and 60 years) are presented. We study the variation in the power dissipated by the human body surface as a function of time for a thermostat temperature of 28 degrees C. We also study the same power with thermostat temperatures varying from 24 degrees to 36 degrees C. Measurements are performed on three different surface areas of the human body: the sternum, abdomen, and hand. The ambient room temperature during all measurements was in the range of 22-24 degrees C, and the subjects were seated and resting. The results show that the heat flux in the trunk is much more stable than that in the hand and that the heat flux in the sternum is greater than that in other areas. Additionally, this flux is higher in the younger subject (42 mW/cm(2)) than in the older subject (35 mW/cm(2)). We also defined a thermal parameter that represents the thermal resistance between the sensor thermostat and the skin. The mean value of this parameter varies between 51 and 71 K/W depending on the subject and measurement area.
ISSN: 0306-4565
DOI: 10.1016/j.jtherbio.2019.02.022
Source: Journal Of Thermal Biology[ISSN 0306-4565],v. 81, p. 178-184
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