MECH 230 Lecture Notes - Volumetric Flow Rate, Isentropic Process, Mass Flow Rate

• School: Queen's University
• Department: Mechanical and Materials Engineering Courses
• Course: MECH 230
• Professor: Prof.

Document Summary

If the specific heats cp and cv are taken as constant. Liquids liquid are incompressible, so v1=v2= v xn=y n = ln y/ln x. Idea gases polytropic process: h(p,t) = u(t) + pv. For the special case of an ideal gas where pv = rt n for a polytropic process n. If the process is reversible and adiabatic (isentropic) pvk= const. Substitute n= k in above equations to get work per unit mass for isentropic process (implies. For the case of n=1: p1v1 = p2v2 t1=t2 (isothermal) n=1. U = q (-w) u = +w. Gas temperature increases from tc to th. U = qh (+w) qh = +w. Heat transfer qh to the gas, temperature stays at th. U = q (+w) u = -w. Gas temperature decreases from th to tc. U = qc (-w) qc = -w. Heat transfer qc from the gas, temperature stays at tc n = 0, constant p process n = 1, isothermal.