AVAILABLE ENERGY CONTOUR LINES ON T-6 AND P-V PLANES

Document Type : Original Article

Authors

1 Lecturer, Dpt. of Mechanical Engineering, Assiut University, Assiut,Egypt.

2 Professor, Dpt. of Agricultural Engineering, Kansas State University, Manhattan , KS 66506, U.S.A.

Abstract

The primary objectives of this paper are : 1-To present the available energy balance equation for a non-reacting closed system. 2- To develop and discuss a computational method for plotting the available energy contour-lines of that system on the temperature-entropy, and pressure-volume planes. 3 - To apply the method and present the contour-lines for three different cases for air : i - as a perfect gas (having perfect gas equation of state and const-ant specific heats), ii. as a semiperfect gas (having perfect gas equation of state and temperature-dependent specific heats), and iii- as a real gas (having Vander-Waals equation as an example for equation of state , and temperature-dependent specific heats).