Energy and Exergy Analysis of Moist Air for Application in Power Plants
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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<sub>atm</sub> = 1.013 bar, T<sub>atm</sub> = 25<sup>o</sup>C and Φ<sub>atm</sub>=50%, are h = 50.56 kJ/kg<sub>a</sub> and ε =11.5 kJ/kg<sub>a</sub>; and for P<sub>atm</sub>= 0.77 bar to the same conditions of T<sub>atm</sub> and Φ<sub>atm</sub>, the enthalpy and exergy increases in a 14% and 20%, respectively.
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