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Saturated thermodynamic properties for the air-water system at elevated temperatures and pressures
Kungliga tekniska högskolan, KTH.
2003 (English)In: Chemical Engineering Science, ISSN 0009-2509, E-ISSN 1873-4405, Vol. 58, no 22, p. 5069-5077Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2003. Vol. 58, no 22, p. 5069-5077
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-4087DOI: 10.1016/j.ces.2003.08.006Local ID: 1f4e5bd0-0d74-11de-9d3e-000ea68e967bOAI: oai:DiVA.org:ltu-4087DiVA, id: diva2:976949
Note
Upprättat; 2003; 20090310 (xiajix)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Ji, XiaoyanYan, Jinyue

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