awhere W is the mass flow, T is the temperature and P is the pressure. The subscripts 1 and 2 refer to the turbine inlet and outlet, respectively. What remains possibly to consider are steam turbine losses and variations with load of the isentropic efficiency. 那里W是流量, T是温度,并且P...
If the isentropic efficiency of the turbine is 85%, i.e. ηT = 0.85, then the turbine work is wT=ηTwT|isen=0.85×629.5=535.0kJ/kg The temperature at the end of the expansion is T2=T1−wT/cp=1273−535.0/1.100=786K. The change of availability is given by eqn (2.13b) as Δ...