Exergy analysis of the human respiration under physical activity
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2009-08-30
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Cyro Albuquerque
PELLEGRINI, L. F.
FERREIRA, M. S.
YANAGIHARA, J. I.
OLIVEIRA, S. DE.
PELLEGRINI, L. F.
FERREIRA, M. S.
YANAGIHARA, J. I.
OLIVEIRA, S. DE.
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ECOS 2009 - 22nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems
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ALBUQUERQUE, C.; PELLEGRINI, L. F.; FERREIRA, M. S.; YANAGIHARA, J. I.; OLIVEIRA, S. DE. Exergy analysis of the human respiration under physical activity, ECOS 2009 - 22nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, p. 47-54, aug. 2009.
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© 2009 by ABCM.This paper presents an exergy analysis of the human body under physical activity. A model of the respiratory system and a model of the thermal system were used for this purpose. They consider heat and mass transfers in lungs, tissues and blood. Each component of those models is represented by an uniform compartment governed by equations for diffusion, convection, O2 consumption, CO2/heat generation and heat and mass transfer with the environment. The models allow the calculation of the exergy destruction in the lung and tissues, and the participation of each entropy generation mechanism in the total generation. Furthermore, a discussion is proposed regarding the efficiency of the human body under physical exercise.