The power cycle shown below operates under steady conditions and develops a net power output of 1.6 MW. The power cycle receives energy through one heat exchanger (heat exchanger 1) from steam condensing at a constant pressure of 225 kPa. The steam enters the heat exchanger at a quality of 90% and exits the heat exchanger as a saturated liquid. Energy is transferred from the power cycle through another heat exchanger (heat exchanger 2) to a lake that is at a temperature of 13 degrees C.
There is no other heat transfer between the power cycle and the surroundings. Kinetic and potential energy effects can be neglected. Determine the minimum possible mass flow rate of steam through the heat exchanger 1 in kg/s.