An ocean thermal energy conversion (otec) power plant built in hawaii in 1987 was designed to operate between the temperature limits of 86of at the ocean surface and 41 o f at a depth of 2100 ft. about 13,300 gpm of cold seawater was to be pumped from deep ocean through a 40-inch diameter pipe to serve as the cooling medium or heat sink. if the cooling water experiences a temperature rise of 6 o f and the thermal efficiency is 2.5 percent, determine the amount of power generated. take the density of seawater to be 64 lbm/ft3 .

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.