You are using an outdated browser. Please upgrade your browser to improve your experience.
Javascript is disabled in your web browser. For full functionality of this site it is necessary to enable JavaScript.
This website is using cookies.
We use them to give you the best experience. If you continue using our website, we'll assume that you are happy to receive all cookies on this website.
CPOTE2022 logo
7th International Conference on
Contemporary Problems of Thermal Engineering
Hybrid event, Warsaw | 20-23 September 2022

Abstract CPOTE2022-1017-A

Book of abstracts draft
slider slider slider slider slider slider

Exergy analysis of the human body and its environment to evaluate air conditioning systems

Carlos Eduardo MADY, University Center of FEI, Brazil
Debora MOLLIET, University of Campinas, Brazil

Brazil is, in its majority, a hot climate country. To promote thermal comfort, several houses, commercial buildings, and public spaces use air conditioning systems, primarily refrigerating systems. However, these machines require a significant amount of energy to operate. As energy is a valuable and limited resource, it must be used strategically and sustainably. Therefore, we have to consume less energy to provide the same outcomes, achieving higher energy efficiency. Consequently is imperative to use the exergy analysis to evaluate these energy conversion systems. For translating the occupants' diversity of bodies and heat production, four types of human thermal models will be used to assess thermal comfort conditions: a man using lighter clothing, a man in traditional office clothing, and two women. We chose these four models since the body composition and basal metabolism rates vary significantly between males and females (in the luteal and follicular phase of the menstrual cycle). In addition, the insulation of garments impacts the thermal comfort conditions. A combination of these four models will represent the occupants of a commercial building. The outputs of these occupants will be used as inputs for a computational model of the building to calculate the associated thermal loads of an actual building in Brazil. A vapor compression system and an absorption system are modeled for this thermal load. Also, the new temperature and humidity setpoints can be explored as options to provide thermal comfort for a more democratic environment with lower energy expenditure and use natural resources more rationally.

Keywords: Exergy analysis, Heating, ventilating and air conditioning, Thermal comfort, Energy human comfort model, Exergy human comfort model
Acknowledgment: CNPq - National Council for Scientific and Technological Development - Process: 307405/2021-4