Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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During a prefeasibility survey, you have identified a feasible site for a micro hydropower scheme. If you’ve measured a gross head of 40 m, and from the hydrological analysis, a design flow of 150 l/s appears to be available throughout the year, what would be the likely installed capacity? Assume an overall efficiency of 60%.
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A village has 1,182 persons. Each person uses 13.4 kWh of electricity per day. They are considering installing a small run of river hydroelectric facility where the flow rate is 3.0 m3/s and the equivalent head is 20 m. The system has 90% efficiency and pipe losses are expected to be 5%. Determine if the proposed run-of-river facility can produce the required daily energy requirements if a micro hydrokinetic water turbine is used.
Determine the total energy production of a run-of-river plant having an total efficiency of 85%. It receives flow by means of a penstock, 400m long with 1.2m diameter, and f=0.015 in Darcy-Weisbach equation. The available head is 200m and seasonal fluctuations of upstream and downstream water levels are ignored. The flow duration data are tabulated as below.
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- The flow of a river is 150 cubic feet per second at a site where a 75 feet hydrostatic head canbe created by the erection of a dam. What is the potential capacity (in kW) of a hydroelectricpower plant if installed at this site? Consider that hydraulic efficiency of energy conversioncan be 80%, and that the electric efficiency can be 90%.arrow_forwardA 35 percent-efficient coal-fired power plant with effective height of 100 m emits SO2 at a rate of 0.6 lb/10^6 Btu into the plant. If winds are assumed to be 4 m/s at the stack height and just over 3 m/s at 10 m, how large could the plant be (MW) without having the ground level SO2 exceed 365 micrograms/m^3?arrow_forwardThe observed difference between the high and low water tide 13 for a proposed tidal site. the basin area is about 2 sq km. which can generate power for 4 hr in each cycle. the average head is assumed to be 8m and overall efficiency of the generation to be 78%. calculate the power in hp at any instant and the yearly power output average specific weight of sea water is assumed to be 1025 kg/m^3. Volume of the basin= Average discharge= Power = total energy in tidal cycle= total output / annum=arrow_forward
- Design head at China’s Three Gorges Dam, the largest hydropower project in the world, is 80.6 m, and rated power output of each of the 32 turbine generator units is 700 MW. If the efficiency of each of the turbine generator units at full power output is 93.2%, what is the design flow through each turbine?arrow_forwardAt a proposed hydroelectric power plant site, the average elevation of headwater is 600m and the tailwater elevation is 480m. The average annual water flow is determined to be equal to that volume flowing through a rectangular channel 4m wide and 0.5m deep and average velocity of 5.5m/s. Assuming the plant will operate 350 days/year, find the energy kwh that the plant site can developed if the hydraulic turbine that will be used has an efficiency of 78% and generator efficiency of 90%. Consider a headwork loss of 4% of the available head.arrow_forwardCalculate the continuous power that will be available from hydroelectric plant having an available headof 300 meters, catchment area of 150 sq. km, annual rainfall 1·25 m and yield factor of 50%. Assumepenstock, turbine and generator efficiencies to be 96%, 86% and 97% respectively. If the load factor is40% what should be the rating of the generators installed ?arrow_forward
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