Question: Cooling water for a heat exchanger is pumped from a lake through an insulated 3-in. diameter Schedule 40 pipe. The lake temperature is 50°F and the vertical distance from the lake to the exchanger is 200 ft. The rate of pumping is 150 gaymin. The electric power input to the pump is 10 hp.
a. Draw the flow system showing the control surfaces and control volume with reference to a zero energy reference plane.
b. Find the temperature at the heat exchanger inlet where the pressure is 1 psig.