In a hydroelectric power plant, water at 20°C is supplied to the turbine at a rate of 0.55 m/s through a 200-m-long, 0.35-m-diameter cast iron pipe. The elevation difference between the free surface of the reservoir and the turbine discharge is 140 m, and the combined turbine-generator efficiency is 79 percent. Disregarding the minor losses because of the large length-to-diameter ratio, determine the electric power output of this plant. The density and dynamic viscosity of water at 20°C are p= 998 kg/m3 and u= 1.002 x 10-3 kg/m-s. The roughness of the cast iron pipes is ɛ = 0.00026 m. The electric power output of this plant is |kW.

Q: A three phase generator is operating at 1500rpm and has a no-load voltage of 7 kV. What would be the…

A: In this question, we need to choose the correct option.

Q: What can you say about the flow of power as a function of time between a balanced three-phase source…

A: Concept: A definition of a function is that a relation from a set of inputs to a set of possible…

Distribution System

The final stage in the delivery of the electric power is the electric power distribution system. From the transmission system to the individual customers it carries electricity. The distribution system is connected with the transmission system and is used to lower the voltage of the transmission to medium voltage in the range of 2 kV to 35 kV with the help of transformers. This medium voltage to the distribution transformers located near the customer's premises is carried by the primary distribution system lines. These distribution transformers in turn lower the voltage to utilization voltage used in lightings, household appliances, industrial equipments etc. Through secondary distribution lines often several customers are supplied from one transformer. It is through service drops, the commercial and residential customers are connected to the secondary distribution system lines. Customers who demand a larger amount of power can be connected directly to the primary distribution system level or the sub-transmission level.