In a steady flow, adiabatic, aergonic desuperheater (a kind of mixing heat exchanger), water is sprayed into superheated steam in the proper amount to cause the superheated steam to become saturated.
a. Calculate the mass flow rate of water necessary for desuperheating.
b. What is the entropy production rate of this system?
c. Show whether this process violates the second law of thermodynamics.
Given that
- Steam mass flow rate = 200. kg/h.
- Steam entering state = 10.0 MPa, 600.°C.
- Water entering state = 10.0 MPa, 100.°C.
- Steam outlet state = 10.0 MPa, saturated vapor.