1st Law Energy Balance

Once these assumptions are taken into account the Brayton Cycle becomes a closed loop heat engine. From this basis, we can now apply the first law of thermodynamics using an energy balance to quantify the performance of the Brayton Cycle. 

Energy Balance for an Ideal Brayton Cycle

(qin –qout) +(win-wout) =(hexit-hinlet)

Thermal Efficiency of an Ideal Brayton Cycle

e = Efficiency
k = Specific Heat Ratio
rp = Pressure Ratio

 


Text reference (Thermodynamics 5th Ed., Cengle, Y. p 508-509)

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http://www.mpoweruk.com/heat_engines.htm

http://web.mit.edu/16.unified/www/FALL/thermodynamics/notes/node28.html