MAE 204 Lecture Notes - Lecture 23: Isochoric Process, Compression Ratio, Isothermal Process

• School: University at Buffalo
• Department: Mechanical & Aerospace Engr
• Course: MAE 204
• Professor: Salac David

Document Summary

Regenerative (feed water heater) open fwh nth = 1 - q. out/q. in = 1- q. /cp. => m. 5 = ym. 5 +m. 7 => m. 7 =(1-y)m. 5 nth = 1-m. 5 (h2-h1)/m. 5(h5-h4) = 1- (1-y)(h2-h1)/(h2=h4) Power cycle, hwere the working fluid is a gas ( no phase change) 3 common types, combustion ignition - reciscating engine compression ignition - recisprcation engine. All of the ideal cycle for these types include the following info. 4-1 isentropic comprssion area under pv diagram = net work out area under ts diagram = net heat in. Wb = pdv qin = tds nth = 1-qout/qin = 1 -tl/th. An actual gas power engine is not a cycle. 1,the working fluid is air,which is an ideal gas, and operates on a cycle, Note: nothing is said about exact vs. approximate analysis. If specific heats are constant and evaluated at 25c, then this is the cold air standard.