Water at 25°C, 1 bar is drawn from a mountain lake 1 km above a valley and allowed to flow through a hydraulic turbine-generator into a lake on the valley floor. For operation at steady state,...

Water at 25°C, 1 bar is drawn from a mountain lake 1 km above a valley and allowed to flow through a hydraulic turbine-generator into a lake on the valley floor. For operation at steady state, determine the minimum theoretical mass flow rate, in kg/s, required to generate electricity at a rate of 1 MW. Let T0 5 25°C, p0 5 1 bar and ignore the effects of motion.

For the simple vapor power plant of, evaluate, in MW,

(a) the net rate energy exits the plant with the cooling water and

(b) the net rate exergy exits the plant with the cooling water. Comment. Let T0 5 20°C, p0 5 1 bar and ignore the effects of motion and gravity.