Page 129 - Mechanical Engineer's Data Handbook

118 MECHANICAL ENGINEER’S DATA HANDBOOK

3.8.2 Simple cycle with heat exchanger T
3
( 3
Heat supplied Q=c,T,t 1--
[( :> 1
Work done W=c,T, t 1-- -(c-1)

C
Efficiency q = 1 --
t

S
cc n
6
C =compressor T =turbine
CC = combustion W = work done
HE = heat exchanger

r

3.9 Heat engine cycles

T2
3.9. I Carnot cycle Efficiency q = 1 --
TI
The ideal gas cycle is the Carnot cycle and, in practice, P4 TI
only about half of the Carnot cycle efficiency is realized (sl - s4) = R In - -c, In -
T2
Pz
between the same temperature limits.
4

V