I 1 1 2 1 3 1 4 I 5 6 1 7 1 8 10 1 11 I 12 1 13 1 3. Taibah University College of Engineering at Yanbu Department of Mechanical Engineering Question 3 What important steps need to be taken to choose a site with good wind conditions and to calculate the energy yield from that site? Taibah University College of Engineering at Yanbu Department of Mechanical Engineering 5.2 what are the drawbacks of geothermal energy and what are its applications? Renewable Energy Systems (ME 484)- Homework Page 6 of 9 83%

I 1 1 2 1 3 1 4 I 5 6 1 7 1 8 10 1 11 I 12 1 13 1 3. Taibah University College of Engineering at Yanbu Department of Mechanical Engineering Question 3 What important steps need to be taken to choose a site with good wind conditions and to calculate the energy yield from that site? Taibah University College of Engineering at Yanbu Department of Mechanical Engineering 5.2 what are the drawbacks of geothermal energy and what are its applications? Renewable Energy Systems (ME 484)- Homework Page 6 of 9 83%

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.37P

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Include a free body diagram 4. A hydraulic turbine is used to generate power by using water in a dam. The elevation difference between the free surface stream and the downstream of the dam is 120 m. The water is supplied to the turbine at a rate of 150 kg/s. if the shaft power output from the turbine is 155 KW, the efficiency of the turbine isA.0.77B. 0.88C. 0.80D. 0.85
Consider two identical wind turbines with a hub height of 40 m, one located in flat agricultural land and one located above a forest. What is the relative output power for the two turbines if the wind velocity is 10 m/s at a height of 100 m in both cases? Pagricultural/Pforest = ?
A small wind turbine of blade diameter 180 cm is subjected to upwind velocity of 12.3 m/s and downwind velocity of 10.5 m/s. Calculate the power and energy produced by the turbine per year. Density of wind is 1.2 Kg/m3.
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Dresden, Germany has a population of 700,000 and a population density of2200 km-2 in the urban area. Assume that the electrical needs of Dresden are an average of1.0 kWe per capita and these are satisfied by a wind farm consisting of 100 m diameterthree-rotor wind turbines operating at optimal efficiency and with optimal spacing. If thewind velocity is constant at 7 m/s, what is the area of the wind farm? The optimal efficiency, η = 0.49 and The ideal spacing for a turbine is 300m by 1000 meters Sustainable energy, 2nd edition, Ch 10, Problem 17P
Dresden, Germany has a population of 700,000 and a population density of2200 km-2 in the urban area. Assume that the electrical needs of Dresden are an average of1.0 kWe per capita and these are satisfied by a wind farm consisting of 100 m diameterthree-rotor wind turbines operating at optimal efficiency and with optimal spacing. If thewind velocity is constant at 7 m/s, what is the area of the wind farm? The optimal efficiency, η = 0.49 and The ideal spacing for a turbine is 300m by 1000 meters Answer in km2
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A mining company depleted more than half of its ore reserves and is no longer using all of its shaft infrastructure. It considers using one of the old shafts for pumped-storage hydro-electricity generation. This means that water will be pumped to the higher level, which is 1 000 m above the bottom level, at night when Eskom charges lower, off-peak, rates. The “higher level” will be changed into a dam (reservoir) by means of plugs that will be installed in some tunnels. The stored water has potential energy, which will be used to generate electricity for the mine at peak hours, when electricity is expensive. The pump that will be installed at the bottom of the column will also be used as a turbine for the generation of electricity The pump-as-turbine (PAT) must pump water to a height of 1 000 m through a column with an internal diameter (ID) of 345 mm. 3.1. Calculate the velocity of the water in the pipe if the quantity of water to be pumped is 220 litres per second (lps). 3.2.…
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