Calculation Model and Application Research of Molar Formation Enthalpy for Real Gas

Fang Fang Zhang; Zhen Shan Zhang; Jia Liu

doi:10.4028/www.scientific.net/AMR.850-851.889

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 850-851Calculation Model and Application Research of...

Calculation Model and Application Research of Molar Formation Enthalpy for Real Gas

Abstract:

Compared to condensed phase, effect of pressure on molar formation enthalpy for gas phase can not be ignored. To study calculation method of molar formation enthalpy for real gas, calculation formula of isothermal enthalpy difference is deduced under temperature and pressure coupled interaction by SHBWR equation of state, and whose applicability inspection is finished by experimental data of molar formation enthalpy for superheated steam. Results show that, calculation accuracy of model increases along with the increase of temperature, but decreases along with the increase of pressure. When working temperature is more than 800 K, the established model can calculate molar formation enthalpy for real gas accurately. Steady state properties of a thermal power system is analyzed based on the established model according to Hesss Law, result show that, heat flux of the system increases under pressure action, and mass flow rate of hydrogen the system needs decreases at the same time.

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Periodical:

Advanced Materials Research (Volumes 850-851)

Pages:

889-892

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.850-851.889

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Online since:

December 2013

Authors:

Fang Fang Zhang, Zhen Shan Zhang, Jia Liu

Keywords:

Equation of State, Mathematical Models, Molar Formation Enthalpy, Real Gas

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