Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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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.
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%.
3. Explain different components of small hydroelectric power system and their design considerations.
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- A generating system consists of the following units:(A) 1 x 10 MW unit(B) 1 x 20 MW unit(C) 1 x 30 MW unit(D) 1 x 40 MW unitThe 10, 20 and 30 MW units have forced outage rates of0.08. The 40 MW unit has afull forced outage rate of0.08 and a 50% derated state which has a probability of0.06. (a) Calculate the LOLE for this system for a single daily peak load of 60 MW. (b) Whatis the LOLE for the same condition if the 40 MW unit is represented as a two-statemodel using an Equivalent Forced Outage Rate?arrow_forwardIn a hydroelectric project, a discharge of 400 m/s is available with net head of 32 m. If two turbines of same size having specific speed Ns are required to give an efficiency of 90 % then Ng (in Sl unit) of each turbine is_ (Assume speed of each turbine to be 152 r.p.m.).arrow_forwardQ6/The average monthly inflow for a river are shown in the table below. A-Draw flow duration curve B-Determine the hydroelectric power in Mwatt, at 50% and 90% dependability. Assume plant efficiency is 80% and gross head is 36m. Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Flow 30 55 50 100 120 80 63 78 19 45 20 (cumees) 40arrow_forward
- Question 4: The three gorges dam is rated at maximum output. If its generating efficiency is 90 % and its head is 81 m what is the rate of flow in (kg/s) of water through its turbines at maximum output.arrow_forwardDiscuss the benefits of pumped storage hydropower (PSH).arrow_forwardThe water behind a Dam is 206 m higher than the River below it. The water inthe dam is allowed to flow into the river to generate power.(i) Describe the energy conversions that take place at the hydro powergeneration plant.(ii) Apply the steady flow energy equation to determine the rate the water mustpass through the hydraulic turbines of this dam to produce 50 MW of power if theturbines are 100 percent efficient?arrow_forward
- Problem- Two turbo-generators, each capacity 25,000 kW, have been installed at a hydel power station. The load on the hydel plant varies from 15,000 kW to 40,000 kW. What is the total installed plant capacity and the load factor.arrow_forwardQ6/The average monthly inflow for a river are shown in the table below. A-Draw flow duration curve B-Determine the hydroelectric power in Mwatt, at 50% and 90% dependability Assun plant efficiency is 80% and gross head is 36m. Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Flow 30 55 50 100 120 80 63 78 19 45 20 (cumees) 40arrow_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_forward
- A turbine develops 500 kW power under a head of 100 metres at 200 r.p.m. What would be its normal speed and output under a head of 81 metres?arrow_forwardAn HES with a large water storage reservoir and a dam is operating underthe following conditions:• Number of hydro turbines n = 9• Power plant capacity factor CF = 0.62• Water flow rate Q = 125 m3/s (per turbine)• Net water head H = 490 m• Power plant overall (electrical) efficiency ηel = 0.9Determine (a) the electric power output and (b) the annual power generation of the plant.arrow_forward8. Energy Equation Water at the Lake William Dam enters a hydraulic turbine through a 30 cm diameter pipe at a rate of 0.6 m³/s and exits through a 25-cm diameter pipe. For the system, elevation effects are negligible and the pressure drop across the turbine is measured to be 148 kPa. For a combined turbine-generator efficiency of 83 percent, calculate (a) hurbine and (b) Wubrine- You look in the FE handbook and see: W turbine = 7/turbine-gen”ightutine, e turbine-genhtubine, e 30 cm diameter 25 cm diameter Turbine Generatorarrow_forward
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