Steam flows at 60 m/s through a steam main of 1.6 MPa, 280°C. Four tanks are connected to this main by pipes which are closed by valves, as shown in Figure P6.26. Tank A, which has heat-conducting...

Steam flows at 60 m/s through a steam main of 1.6 MPa, 280°C. Four tanks are connected to this main by pipes which are closed by valves, as shown in Figure P6.26.

Tank A, which has heat-conducting walls, is surrounded by a constant-temperature bath at 280°C, and is initially evacuated. Tank B is similar to tank A except that it initially contains steam at 0.8 MPa and 280°C. Tank C has adiabatic walls and is initially evacuated. Tank D has adiabatic walls and initially contained steam at 0.8 MPa, 280°C. The valves to the tanks are opened, and closed again when the tanks are fi lled with steam.\

a. Find the heat transfer to the steam in tank A.

b. Find the heat transfer to the steam in tank B.

c. Find the final state in tank C.

d. Find the final state in tank D.