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JulijaS [17]
3 years ago
13

A wind turbine designer is considering installing a horizontal axis wind turbine at a location in Michigan. To increase the powe

r extracted from wind, the designer is debating between increasing the blade radius by 10% versus increasing the height from 40 m to 60 m, which would increase the average wind speed from 6 mph to 6.5 mph. Considering the only the impact on power extraction, the designer should go with the height increase.
a. True
b. False
Engineering
1 answer:
bogdanovich [222]3 years ago
3 0

Answer:

False ( B )

Explanation:

considering that the wind turbine is a horizontal axis turbine

Power generated/extracted by the turbine can be calculated as

P =  n * 1/2 *<em> p</em> *Av^3

where: n = turbine efficiency

           <em>p = air density </em>

<em>            </em>A = πd^2 / 4

           v =  speed

From the above equation it can seen that increasing the Blade radius by 10% will increase the Blade Area which will in turn increase the value of the power extracted by the wind turbine

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The range of the glass transition temperature are between the 0 to -150°C. The basic use of the polymer is basically depend upon the main properties of the polymer.

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The minimum safe working distance from exposed electrical conductors
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If a heat engine has an efficiency of 30% and its power output is 600 W, what is the rate of heat input from the combustion phas
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Answer:

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Explanation:

The energy efficiency of the heat engine (\eta), no unit, is defined by this formula:

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If we know that \dot W = 600\,W and \eta = 0.3, then the heat input from the combustion phase is:

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3 years ago
Technician A says that mechanical shifting controls can wear out over time. Technician B says that vacuum control rubber diaphra
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Based on the information, both technician A and technician B are correct.

<h3>How to depict the information?</h3>

From the information given, Technician A says that mechanical shifting controls can wear out over time.

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