Power is transmitted through a shaft, rotating at 2.5 Hz (150 rpm). The mean torque on the shaft is 20 x 103 Nm. What magnitude of power in kW is transmitted by the shaft?
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- A turbine is rotating at a constant speed of 2400rev/min. At what constant rate in radian/sec^2 must its motion be retarded to bring it to rest in 20 minutes?Paolo owns a hydroelectric power generating system as shown in HG008. Water flows from an upper reservoir to a lower one passing through a turbine at the rate of 150 lps. The total length of pipe connecting the two reservoir is 100 m. The pipe diameter is 250 mm and the Hazen – Williams coefficient is 120. The water surface elevations of reservoirs 1 and 2 are 197 m and 50 m, respectively. 1. Find the frictional head loss in the pipe in m. 2. Determine the power generated by the turbine in kW. Neglect minor losses.Water is flowing in a 3 m wide rectangular channel. A hydraulic jump occurs and the flow upstream is 360 mm deep while the flow downstream from the jump is 1300 mm deep. A) Find the discharge flowing in the channel. B) Find the energy absorbed by the jump in kW. Please answer correctly
- Can you also draw the figure A pump delivers water from a lower to a higher reservoir. The difference in elevation between the reservoirs is 10 m. The pump provides an energy head of 11 m and the frictional losses amounts to 0.7 m. If the pipe diameter is 250 mm, calculate the discharge.The flow rate of the hydroelectric power plant in the figure is 50 m3/s, and 2 meters of water column energy loss occurs due to friction in the pipeline. Find the power that water transfers to the turbine. Calculate the theoretical and actual power of the turbine by taking the efficiency of the turbine-generator group, η = 0.92. (Answer: ?theoric=52 ?? and ?real=48 ??.)Water leaving the nozzle at a velocity of 4350 m/min with a volume flow rate of 0.736 m³ . if the density of water is 0.000997 kg/cm³ . How will you determine the potential for power generation in a hydraulic turbine .
- A drum when rotating at 439 rev/min has a kinetic energy of 0.56 MJ. Find the moment of inertia.Water from a fire hose is directed horizontally against a wall at a rate of 500 g/s and a speed of 4.2 m/s. Calculate the force exerted on the wall, assuming the water’s horizontal momentum is reduced to zero.The rotor of an electric motor has an angular velocity of 3570 rpm when the load and power are cut off. The 65-kg rotor, which has a centroidal radius of gyration of 175mm, until it reaches the maximum speed of 5250 rpm. Knowing that the kinetic friction results in a couple of magnitude 4.5 N.m exerted on the rotor, determine the number of revolutions that the rotor executes, before achieving its maximum speed and the time it took.
- Water is flowing in a 90° triangular channel at a depth of 39 cm. A hydraulic jump occurs. The depth after the jump is 126 cm. a. What is the discharge?b. What is the decrease in specific energy caused by the jump?c. What is the head loss in kW?24. Reservoir A and B have elevations of 100 m and 160 mm respectively. A pump is installed near reservoir A to pump water from A to B. The rate of flow in the pipes is 650 L/s and the pipe length of 1000 m with a diameter of 600 mm. If C= 120 what is the Energy added by the pump?76.1 m56.5 m87.3 m68.2 mAn open cylindrical tank 800mm in diameter and 2000mm high contains water to a depth of 1.6m. It is rotated about its vertical axis at 13 rad/s. How many liters of water are spilled? Use density of water as 1000kg/m3 and specific weight as 9.81kN/m3