Energy and Exergy Analysis of Moist Air for Application in Power Plants

Martín Salazar-Pereyra, Miguel Toledo-Velázquez, G. Tolentino Eslava, Raúl Lugo-Leyte, Celerino Reséndiz Rosas
DOI: 10.4236/epe.2011.33048                

Abstract

In this study an energy and exergy analysis is made of moist air, it is used the psychometrics charts. A Visual Basic program is used to generate psychometrics charts. These charts are used to analyze the air thermodynamic behavior, considering the environmental variations, pressure, temperature and relative humidity. Also, the available energy in the cooling processes at constant enthalpy, humidification at constant temperature and heating with constant relative humidity is analyzed. For example, we obtained that the enthalpy and exergy in a thermodynamic state, with conditions, P_atm = 1.013 bar, T_atm = 25^oC and Φ_atm=50%, are h = 50.56 kJ/kg_a and ε =11.5 kJ/kg_a; and for P_atm= 0.77 bar to the same conditions of T_atm and Φ_atm, the enthalpy and exergy increases in a 14% and 20%, respectively.

Keywords

Energy Analysis, Exergy Analysis, Moist Air, Power Plants

Conflicts of Interest

The authors declare no conflicts of interest.

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