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- please find minimum pumping power? First tube lenght= 20m first tube diameter=6cm second tube lenght= 35m second tube diameter=4cm water height= 30m flow=22Lt/second sharp edge loss = 0.5 g=9.81m/sn2, ε=0.00026m, μ=1.139x10-3kg/m.snA group of engineers is designing a new hydroturbine by scaling up an existing one. The existing turbine (turbine A) has diameter DA = 1.50 m, and spins at n.A = 150 rpm. At its best efficiency point, V.A = 162 m3 /s, HA = 90.0 m of water, and bhpA = 132 MW. The new turbine (turbine B) will spin at 120 rpm, and its net head will be HB = 110 m. Calculate the diameter of the new turbine such that it operates most efficiently, and calculate V.B and bhpB.Sprayer has 3 m used to spray 30 ha, speed 0.97 m/s, field efficiency 75%, The sprayer uses 75% of its width, the EFC is:
- Assume we install a low-head hydroelectric plant designed to divert Q=100 m3/s from a river with a net head is h=1.5m and efficiency 40%. Suppose the river can sustain this flow 3000 hrs per year. Calculate installed capacity, expected annual energy generation, and the capacity factor. (Wrong answer will get Dislike for Sure)Estimate the power available from a proposed micro hydro scheme at a site having a small stream of 100 l/s of flow at a head of 30 m. Assume the overall efficiency of the system is 60% and density of fresh water is 994 kg/m^3.The suction diameter of 60mm reads 2psi vaccum and 50mm diameter discharge with 250kpag. The suction water level is 5m above water pump center line and discharge water level is 25m above the pump center line. The total head loss at suction and discharge is 2m. If discharge is 0.01m3/s, find the horsepower needed to pump the water for 80% pump efficiency. ANSWER: 8.15 hp
- The San Francisquito plant no. 1 is supplied by 3 steel-lined penstocks each 80 inches in diameter that carries a combined volumetric flow rate of 712 ft3/s. Assuming water at 80°F find a)Head loss (in feet) due to viscous effect . Include both major and minor losses. b)Your estimate of the power generation potential in MW.A pump operates on a head of 35 m, delivering 80 L/s of I water at 80% efficiency. The pump is driven by a diesel engine by means of a chain and sprocket with a service factor of 1.4. If the horsepower per strand is 28, find the approximate number of strands needed: (Ans. 2)A group of engineers is designing a new hydroturbine by scaling up an existing one. The existing turbine (turbine A) has diameter DA = 1.50 m, and spins at n.A = 150 rpm. At its best efficiency point, V.A = 162 m3 /s, HA = 90.0 m of water, and bhpA = 132 MW. The new turbine (turbine B) will spin at 120 rpm, and its net head will be HB = 110 m. Calculate and compare the efficiency of the two turbines. They should be the same since we are assuming dynamic similarity. However, the larger turbine will actually be slightly more efficient than the smaller turbine. Use the Moody efficiency correction equation to predict the actual expected efficiency of the new turbine. Discuss.
- 1) If the electrical power required for a house is assumed to be 5kW, the requirement of 150044 houses.A HES with the installed capacity to meet the needs will be established. This installed power includes 7 generators and it will be provided from the penstock pair. Net water head 190 m and penstock calculated for the facility 91% efficiency, 85% turbine efficiency, 96% generator efficiency, transformer efficiency.It is calculated to be 93%. Calculate the required water flow for each force. (ρ: specific weight: 1000 kg /m³, g: Gravitational acceleration: 9.81 m/s²) 2)In this example, if the total efficiency of the system could be increased to 85%, how would the required water flow rate?would be affected? Show by calculatingSome engineers are evaluating potential sites for a small hydroelectric dam. At one such site, the gross head is 340 m, and they estimate that the volume flow rate of water through each turbine would be 0.95 m3 /s. Estimate the ideal power production per turbine in MW.An existing impulse turbine-generator installation operates at 450 rpm under a net Head of 520 m. The output current is 60 cycles per second. If a single 18-cm diameter waterjet is used, Cv = 0.98, Øe = 0.45 and ηT = 0.85. Find the flow through turbine in m3/sec.