9. The absolute pressure in water at a depth of 5 m is 145 kPa. What...
9) Electrical power is to be generated by installing a hydraulic turbine-generator at a site 70 m below the free surface of a large water reservoir that can supply water at a rate of 1500 kg/s steadily. If the mechanical power output of the turbine is 800 kW and the electric power generation is 350 kW, determine the turbine efficiency and the combined turbine-generator efficiency of this plant. Neglect losses in the pipes. (10pts).
The water in a large lake is to be used to generate electricity by the installation of a hydraulic turbine generator at a location where the depth of the water is 50 m. Water is to be supplied at a rate of 5000 kg/s. If the electric power generated is measured to be 1862 kW and the generator efficiency is 95 percent, determine (a) the overall efficiency of the turbine-generator, (b) the mechanical efficiency of the turbine, and (c) the...
hydroelectric power plant problem provided in a standby plantr Tme enceCythe hyuidelectiic lali wiii The demand for electric power is usually much lighter during the day than it is at night, and utility companies often sell power at night at much lower prices to encourage consumers to use the available power generation capacity and to avoid building new expensive power plant that will be used only a short time during peak periods. Utilities are also to purchase power produced during...
4. Water is pumped from a lake to a storage tank 20 m above at a rate of 90 Ls while consuming 25.4 kW of electric power. Disregarding any frictional losses in the pipes and any changes in kinetic energy, determine (a) the overall efficiency of the pump motor unit and (b) the pressure difference between the inlet and the exit of the pump. he 20m
What is the absolute pressure at a depth of 9.77 m below the surface of a deep lake? Assume atmospheric pressure is 1.01 x 10° Pa. absolute pressure:
Water (density 998 kg/m', absolute viscosity 1.12x10 Ns/m2) is pumped from a lake into a reservoir at a rate of 0.7 m/s. The water flows through a re-entrant opening, a valve, and a sharp-edged exit, which have loss coefficients of 0.8, 10, and 1, respectively. The pipe has an absolute roughness of 1x104m and di of 0.30 m. The pump efficiency is 65%. A) Is the flow in the pipe laminar or turbulent? (2 points) B) What is the power...
In a reheat-cycle power plant, steam enters the high-pressure turbine at 5 MPa, 450°C, and expands to 0.5 MPa, after which it is reheated to 450°C. The steam is then expanded through the low-pressure turbine to 7.5 kPa. Liquid water (Vi 0.001 m/kg) leaves the condensor at 30°C, is pumped to 5 MPa, and returned to the steam generator. Each turbine is adiabatic, with an isentropic efficiency of 81.6 % and the pump efficiency is 848 %. If the total...
Storage tank 18 m Pump Water is pumped from a lake to a storage tank 18 m above at a rate of 64 L/s while consuming 21.2 kW of electric power. Disregarding any frictional losses in the pipes and any changes in kinetic energy, determine (a) the overall efficiency of the pump-motor unit and (b) the pressure difference between the inlet and the exit of the pump. b) AP- a) 1 kPa
1. At the bottom of a water reservoir the absolute pressure is 180 ft. The reservoir is located at sea level where the atmospheric pressure is 33.9 ft. A water intake line is located half way down the reservoir. At what depth in the reservoir is the intake line? 2. It has been shown by experiment that the resistance to flow in a pipe is: (circle all correct answers to receive any credit) A. Dependent on the pressure under which...
theavton the ump.if the absolute pressure of the liquid drops below the vapor pressure then cavitation will occur Answer B) False A) True A centrifugal pump delivers water against a net head of 20 meters and a design speed of 1100 rpm. is 10 m/s. he impeller diameter is 0.4 m. Determine manometric efficiency of the pump, if Co2 Intr E) 95% D) 92% A) 85% C) 90% B) 88% Answer In Calculate net head or effective head for Pelton...