Considering Thermoeconomics At steady state, a turbine with an exergetic...

Considering Thermoeconomics

At steady state, a turbine with an exergetic efficiency of 90% develops 7 X 10⁷ kW · h of work annually (8000 operating hours). The annual cost of owning and operating the turbine is $2.5 X 10⁵. The steam entering the turbine has a specific flow exergy of 559 Btu/lb, a mass flow rate of 12.55 X 10⁴ lb/h, and is valued at $0.0165 per kW · h of exergy.

(a) Using Eq. 7.34c, evaluate the unit cost of the power developed, in $ per kW ? h.

(b) Evaluate the unit cost based on exergy of the steam entering and exiting the turbine, each in cents per lb of steam flowing through the turbine.