中材地质辽宁总队行政人员绩效考核管理分析及研究.pdf

Shaft Power Cycles
Ideal cycles
Assumptions:
pressor and turbine are isentropic (reversible adiabatic, η= 100 %)
Pressure losses in both bustion chamber and heat exchanger are negligible.
Working fluid is air. It behaves as an ideal gas
Mass flow rate is constant bustion process is replaced by heat addition process.
Changes of . of the working fluid between inlet and outlet of ponent are negligible.
Heat transfer in heat exchanger plete (ε=100%)
Shaft Power Cycles
Description of simple cycle
Specific work, w
Thermal efficiency, η= w / q
Shaft Power Cycles
First law of thermodynamics (conservation of energy)
q – w = pressor (adiabatic, q=0.)
Turbine
Shaft Power Cycles
Combustion chamber
Shaft Power Cycles
Simple cycle
Regeneration cycle (heat exchange cycle)
To benefit from the exhaust, a regenerator is used to reduce the heat addition, the efficiency is improved since heat rejection is reduced.
Regeneration cycle (heat exchange cycle)
Recall that .