Parametric analysis of heat transfer to supercritical pressure methane

Methane is an interesting propellant to be used together with oxygen in a liquid rocket engine and has the required features to be used as a coolant in a regenerative cooling sys- tem also in the case of an expander cycle engine: in this context its behavior as a coolant flow must be controlled and this is complicated by the fact that methane could be in a near critical condition in the cooling channels and thus be subjected to high thermophys- ical properties variations. The present study investigates the heat transfer to methane looking at the in fluence of the thermodynamic and transport properties variations on the methane heat transfer capabilities. In particular the heat transfer deterioration that could affect methane is deeply investigated. To carry out the necessary parametric studies a parabolized Navier Stokes solver developed by the authors has been used together with accurate equation of state and transport properties models able to describe methane in all the thermodynamic conditions of interest. © 2011 by A. Urbano and F. Nasuti

Pure and Pseudo-pure Fluid Thermophysical Property Evaluation and the Open-Source Thermophysical Property Library CoolProp

Article Pure and Pseudo-pure Fluid Thermophysical Property Evaluation and the Open-Source Thermophysical Property Library CoolProp ACS ActiveView PDFHi-Res Print, Annotate, Reference QuickView PDF [2027 KB] PDF w/ Links[457 KB] Full Text HTML Abstract Supporting Info -> Figures Reference QuickView Add to ACS ChemWorx Ian H. Bell *†, Jorrit Wronski *‡, Sylvain Quoilin *†, and Vincent Lemort *† † Energy Systems Research Unit, University of Liège, Liège, Belgium ‡ Department of Mechanical Engineering, Technical University of Denmark, Kongens Lyngby, Denmark Ind. Eng. Chem. Res., 2014, 53 (6), pp 2498–2508 DOI: 10.1021/ie4033999 Publication Date (Web): January 13, 2014 Copyright © 2014 American Chemical Society OpenURL UNIV DE LIEGE *E-mail: [email protected]., *E-mail: [email protected]., *E-mail: [email protected]., *E-mail: [email protected]. ACS AuthorChoice Abstract Over the last few decades, researchers have developed a number of empirical and theoretical models for the correlation and prediction of the thermophysical properties of pure fluids and mixtures treated as pseudo-pure fluids. In this paper, a survey of all the state-of-the-art formulations of thermophysical properties is presented. The most-accurate thermodynamic properties are obtained from multiparameter Helmholtz-energy-explicit-type formulations. For the transport properties, a wider range of methods has been employed, including the extended corresponding states method. All of the thermophysical property correlations described here have been implemented into CoolProp, an open-source thermophysical property library. This library is written in C++, with wrappers available for the majority of programming languages and platforms of technical interest. As of publication, 110 pure and pseudo-pure fluids are included in the library, as well as properties of 40 incompressible fluids and humid air. The source code for the CoolProp library is included as an electronic annex