Title: An analysis of entropy balances in a multiple layer structure consisting of a human body and a residential thermal environment under the onset of heatstroke

Authors: Yuhei Fukada; Itaru Takahashi

Addresses: Graduate School of Science and Technology, Tokai University, 4-1-1 Kitakaname, Hiratsuka City, Kanagawa, Japan ' School of Architecture and Urban Planning, Tokai University, 4-1-1 Kitakaname, Hiratsuka City, Kanagawa, Japan

Abstract: This paper describes the results of an entropy analysis for grasping the characteristics of entropy balances in a multiple layer structure consisting of a human body and a residential thermal environment under heatstroke onset. The following results were found. Any subsystem has to discard not only entropy disposal from the inner subsystem, but also entropy generation within itself such as the human body, the room air or walls. It is necessary to ensure the sufficient margin of entropy generation within the system, both to decrease entropy input and to increase entropy disposal. Responses of entropy generation to ambient temperature change formed the linkage through multiple layer consisting of the human body and the residential thermal environment. There is a clear difference in hysteresis on the relationship between ambient temperature and entropy generation between 'AC ON' and 'AC OFF'.

Keywords: entropy; multiple layer; heat stroke; design of discarding; space cooling; disposal; generation; hysteresis; balance; residential building.

DOI: 10.1504/IJEX.2024.136931

International Journal of Exergy, 2024 Vol.43 No.2, pp.123 - 146

Received: 31 Mar 2023
Accepted: 08 Oct 2023
Published online: 29 Feb 2024 *

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