Choose a suitable turbine for the following conditions: head, 200 m; available discharge, 2 m/sec: efficiency...

   

Transcribed Image Text:

Choose a suitable turbine for the following conditions: head, 200 m; available discharge, 2 m³/sec: efficiency of turbine, 88%. The turbine is to be used for hydro-electric power generation with the generator coupled to it, and the frequency is to be 50 Hz. At a site for a hydro-electric power project, a flow 90 m³/sec is available at a head of 100 m. Sufficient storage is available. A hydro-electric power plant is to be chosen for the project. (a) Find the power that could be developed, the number of units required, and the capacities of the turbines and generators. Efficiencies of turbines, 89.5%, and of generators 95%. (b) Write specifications for the turbines and generator units. (c) Calculate the main dimensions of the turbine units. (d) Calculate the main dimensions of the generator units. (e) Determine the draft tube areas at inlet and outlet. (f) Determine the setting of the turbines with respect to the tail-water. (g) Find the approximate dimensions of scroll case for each unit. (h) Determine the main dimensions of penstock for each unit. (i) Suggest a preliminary plan layout of the station units, and find the approximate dimensions of the main floor of the building. () Find the cost of energy per kilowatt-hour at the load centre from the following data: Load factor of power system supplied by the station 80%. Cost of the hydro-development, Rs. 1500 per kW installed. Fixed costs, 9%. Operation and maintenance cost, Rs. 7 per kW per year. The load centre is 80 km from the station, and it is necessary to transmit the power to the load centre by means of a 110 kV transmission line. The transmission liability may be taken as Rs. 20 per kW per year. Energy used in generating stations for auxiliaries, etc. 2%. Choose a suitable turbine for the following conditions: head, 200 m; available discharge, 2 m³/sec: efficiency of turbine, 88%. The turbine is to be used for hydro-electric power generation with the generator coupled to it, and the frequency is to be 50 Hz. At a site for a hydro-electric power project, a flow 90 m³/sec is available at a head of 100 m. Sufficient storage is available. A hydro-electric power plant is to be chosen for the project. (a) Find the power that could be developed, the number of units required, and the capacities of the turbines and generators. Efficiencies of turbines, 89.5%, and of generators 95%. (b) Write specifications for the turbines and generator units. (c) Calculate the main dimensions of the turbine units. (d) Calculate the main dimensions of the generator units. (e) Determine the draft tube areas at inlet and outlet. (f) Determine the setting of the turbines with respect to the tail-water. (g) Find the approximate dimensions of scroll case for each unit. (h) Determine the main dimensions of penstock for each unit. (i) Suggest a preliminary plan layout of the station units, and find the approximate dimensions of the main floor of the building. () Find the cost of energy per kilowatt-hour at the load centre from the following data: Load factor of power system supplied by the station 80%. Cost of the hydro-development, Rs. 1500 per kW installed. Fixed costs, 9%. Operation and maintenance cost, Rs. 7 per kW per year. The load centre is 80 km from the station, and it is necessary to transmit the power to the load centre by means of a 110 kV transmission line. The transmission liability may be taken as Rs. 20 per kW per year. Energy used in generating stations for auxiliaries, etc. 2%.

Answer rating: 100% (QA)

To choose a suitable turbine for the given conditions we need to consider the head available discharge and efficiency requirements For the first condition with a head of 200 m and an available dischar... View the full answer