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Saturated thermodynamic properties for the air-water system at elevated temperature and pressure
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- Ji, Xiaoyan (author)
- KTH,Kemiteknik
-
- Yan, Jinyue (author)
- KTH,Kemiteknik,Kungliga tekniska högskolan, KTH
- (creator_code:org_t)
- Elsevier BV, 2003
- 2003
- English.
- In: Chemical Engineering Science. - : Elsevier BV. - 0009-2509 .- 1873-4405. ; 58, s. 5069-5077
- Journal article (peer-reviewed)
Abstract
Subject headings
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- A new thermodynamic model is proposed to calculate the thermodynamic properties for the air-water system in which the dry air was assumed to be a mixture of nitrogen and oxygen with the mole fractions of 0.7812 and 0.2188, respectively. For the vapor phase, fugacity coefficients were calculated with the modified Redlich-Kwong equation of state in which a new interaction parameter of oxygen and water was correlated from the experimental data of oxygen-water system. The dissolved gas followed Henry's law. Henry's constant of nitrogen was calculated with the Helgeson equation of state and that for oxygen was correlated from the experimental data of oxygen-water system. The proposed model was verified by comparing the calculated results with the available experimental data. It is shown that the proposed model is suitable for predicting saturated thermodynamic properties for the air-water system up to 300°C and 200 atm. Furthermore, the prediction results of the proposed model are better than those calculated with the model of Rabinovich and Beketov (Moist Gases, Thermodynamic Properties. Begell: House, 1995), and the application range is wider than that of the model of Hyland and Wexler (ASHRAE Trans. 89(2A) (1983a, b) 500-519, 520-535) which are among the best of today's models
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
Keyword
- Air-water system
- Gases
- Humid air
- Modelling
- Phase equilibria
- State equation
- Chemical engineering
- Kemiteknik
- Energiteknik
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- ref (subject category)
- art (subject category)
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