Other Gas Power System Applications
Helium in a piston–cylinder assembly undergoes a Stirling cycle. In the isothermal compression, the helium is compressed from 15 lbf/in.2, 100°F, to 150 lbf/in.2 The isothermal expansion occurs at 1500°F. Assuming the ideal gas model and ignoring kinetic and potential energy effects, determine
(a) the work and heat transfer, in Btu per lb of helium, for each process in the cycle.
(b) the thermal efficiency.
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