lectric power is to be generated by installing a hydraulic turbine-generator at a site 120 m below the free surface of a large water reservoir that can supply water at a rate of 1700 kg/s steadily. Determine the power generation potential.   The power generation potential is  ______  kW?

A homeowner is trying to decide between a highefficiency natural gas furnace with an efficiency of 97 percent and a ground-source heat pump with a COP of 3.5. The unit costs of electricity and natural gas are $0.115/kWh and $0.75/therm (1 therm = 105,500 kJ). Determine which system will have a lower energy cost.

A four-stroke turbocharged V-16 diesel engine built by a car manufacturer company to power fast trains produces mechanical 3500 hp (2.609 MW) at 1200 rev/min. Determine the amount of work produced in kJ (a) per cylinder per mechanical cycle and (b) per cylinder per thermodynamic cycle.

To maintain a dwelling steadily at 68°F on a day when the outside temperature is 40°F, heating must be provided at an average rate of 300 Btu/min. Determine the electrical power required, in kW, to deliver the heating using: (a) electrical-resistance heating. (b) a heat pump whose coefficient of performance is 2.5, (c) a reversible heat pump operating between hot and cold reservoirs at 68°F and 40°F, respectively.