Applying the Exergy Balance: Closed Systems Steady-state operating data are...

Applying the Exergy Balance: Closed Systems

Steady-state operating data are shown in Fig. P7.80 for an open feedwater heater. Heat transfer from the feedwater heater to its surroundings occurs at an average outer surface temperature of 50^oC at a rate of 100 kW. Ignore the effects of motion and gravity and let T₀ = 25^oC, p₀ = 1 bar. Determine

(a) the ratio of the incoming mass flow rates, .

(b) the rate of exergy destruction, in kW.