A steam turbine operates at steady state with a steam mass flow rate of 4600 kg/h, producing a power output of 1000 kW. At the inlet, the pressure is 60 bar, the temperature is 400oC, and the velocity is 10 m/s. At the exit, the pressure is 0.1 bar, the quality is 0.9 (90%), and the velocity is 50 m/s. Calculate the rate of heat transfer between the turbine and surroundings, in kW.