Modeling the exergy behavior of human body

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dc.contributor Sistema FMUSP-HC: Faculdade de Medicina da Universidade de São Paulo (FMUSP) e Hospital das Clínicas da FMUSP MADY, Carlos Eduardo Keutenedjian
FERREIRA, Mauricio Silva
YANAGIHARA, Jurandir Itizo
SALDIVA, Paulo Hilario Nascimento FMUSP-HC
OLIVEIRA JUNIOR, Silvio de 2012
dc.identifier.citation ENERGY, v.45, n.1, p.546-553, 2012
dc.identifier.issn 0360-5442
dc.description.abstract Exergy analysis is applied to assess the energy conversion processes that take place in the human body, aiming at developing indicators of health and performance based on the concepts of exergy destroyed rate and exergy efficiency. The thermal behavior of the human body is simulated by a model composed of 15 cylinders with elliptical cross section representing: head, neck, trunk, arms, forearms, hands, thighs, legs, and feet. For each, a combination of tissues is considered. The energy equation is solved for each cylinder, being possible to obtain transitory response from the body due to a variation in environmental conditions. With this model, it is possible to obtain heat and mass flow rates to the environment due to radiation, convection, evaporation and respiration. The exergy balances provide the exergy variation due to heat and mass exchange over the body, and the exergy variation over time for each compartments tissue and blood, the sum of which leads to the total variation of the body. Results indicate that exergy destroyed and exergy efficiency decrease over lifespan and the human body is more efficient and destroys less exergy in lower relative humidities and higher temperatures.
dc.description.sponsorship · FAPESP (the State of Sao Paulo Research Foundation) [09/17578-0]
· CNPq (National Research Council) [306505/2009-6]
dc.language.iso eng
dc.relation.ispartof Energy
dc.rights restrictedAccess
dc.subject Human body behavior; Exergy analysis; Exergy efficiency
dc.subject.other entropy generation; thermal comfort; growth
dc.title Modeling the exergy behavior of human body
dc.type article
dc.rights.holder Copyright PERGAMON-ELSEVIER SCIENCE LTD LIM/05
dc.identifier.doi 10.1016/
dc.type.category original article
dc.type.version publishedVersion SALDIVA, Paulo Hilario Nascimento:FM:MPT · MADY, Carlos Eduardo Keutenedjian:Univ Sao Paulo, Polytech Sch, Dept Mech Engn, BR-05508900 Sao Paulo, Brazil
· FERREIRA, Mauricio Silva:Univ Sao Paulo, Polytech Sch, Dept Mech Engn, BR-05508900 Sao Paulo, Brazil
· YANAGIHARA, Jurandir Itizo:Univ Sao Paulo, Polytech Sch, Dept Mech Engn, BR-05508900 Sao Paulo, Brazil
· OLIVEIRA JUNIOR, Silvio de:Univ Sao Paulo, Polytech Sch, Dept Mech Engn, BR-05508900 Sao Paulo, Brazil 2-s2.0-84865426344 WOS:000309243700062 OXFORD ENGLAND
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