As shown in the figure, a system undergoing a power cycle develops a net power output of 1 MW while receiving energy by heat transfer from steam condensing from saturated vapour to saturated liquid at a pressure of 100 kPa. Energy is discharged from the cycle by heat transfer to a nearby lake at 17°C. These are the only significant heat transfers. Kinetic and potential energy effects can be ignored. For operation at steady state, determine the minimum theoretical steam mass flow rate,in kgs-1, required by any suchcycle. 

 

Saturated vapor at 100 kPa, m System undergoing a power cycle- Lake at 17 C Qc Saturated liquid at 100 kPa Wycle = 1 MW cyck