Author:
Mohammed Mohammed K.,Mokhlif Nassir D.
Abstract
A set of computer methods for calculating densities, vapor pressures, enthalpies, internal energies and entropies of methane (R-50), ethylene (R-1150), and propylene (R-1270) to be described. Formulation and solution of equations for these thermodynamic properties to be presented first based on what published by ASHRAE. The data obtained from these subroutines showed very small and acceptable percentage errors when compared with ASHRAE data and what available in the literature. These results ensure that these subroutines are acceptable.
Reference5 articles.
1. Richard B., Richard T., and Steven G.,(( ASHRAE Thermodyanamic properties of refrigerants)), American Society of Heating, Refrigeration, and Air-Conditioning Engineers, 1986.
2. Chan,C. and Haselden, G., 1981.((Computer-Based Refrigerant Thermodynamic Properties, Part 1: Basic Equations)). Int. J. of Refrigeration, vol.4, no. 1. January, pp. 7-12.
3. Chan,C. and Haselden, G., 1981. ((Computer-Based Refrigerant Thermodynamic Properties, Part 2: Program listing)). Int. J. of Refrigeration, vol.4, no. 1. March, pp. 52-60.
4. Chan,C. and Haselden, G., 1981. ((Computer-Based Refrigerant Thermodynamic Properties, Part 3: Use of the program in the computation of standard refrigeration cycle)). Int. J. of Refrigeration, vol.4, no. 1. May, pp. 131- 134.
5. Majid J., Richard T., Richard B., and Robert D., 1986. ((Thermodynamic Properties of Ethylene from Freezing Line to 450 K at pressure to 260 MPa)). J.Phys.Chem.Ref.Data, vol. 15, No. 2.