Question

A wind turbine with a 30 m rotor diameter is mounted with its hub at 50 m above a ground surface ...

A wind turbine with a 30 m rotor diameter is mounted with its hub at 50 m above a ground surface characterised by shrubs. Assume the coefficient of friction is 0.3. Estimate the ratio of specific power in the wind at the highest point that a rotor blade tip reaches to the lowest point that it falls to.

0 0
Add a comment Improve this question Transcribed image text
Answer #1

CH) (50I) HUr (Ho) ) (50 -15

Hope you are satisfied by my response !!

Add a comment
Know the answer?
Add Answer to:
A wind turbine with a 30 m rotor diameter is mounted with its hub at 50 m above a ground surface ...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • 5. (4x5pts = 20pts) An anemometer mounted 10 m above a surface with crops, hedges, and...

    5. (4x5pts = 20pts) An anemometer mounted 10 m above a surface with crops, hedges, and shrubs, shows a wind speed of 5 m/s. Assuming 15°C and 1 atm pressure, determine the following for a wind turbine with hub height 80 m and rotor diameter of 80 m: V top - - 80 m 120 m V bottom - 80 m 5 m/s 40 m 10 m Crops, shrubs, hedges FIGURE P7.2 a. Estimate the wind speed and the specific...

  • Question 30 6 points Save Answer (LO4) A wind turbine with a 40-m-diameter rotor is rotating...

    Question 30 6 points Save Answer (LO4) A wind turbine with a 40-m-diameter rotor is rotating at 21 rpm under steady winds at an average velocity of 14.7 m/s. The electrical power output from the generator is 350 kW. The efficiency of the gearbox is 93% and generator efficiency is 86%. Take the density of air to be 1.013 kg/m. Answer the following questions; use the white paper to work-out your calculations and then choose the correct answer from the...

  • Consider a 1 MW, 50 m diameter horizontal axis, fixed wind turbine operating at a wind...

    Consider a 1 MW, 50 m diameter horizontal axis, fixed wind turbine operating at a wind speed of 12 m/s. 3 blades mounted on a cast iron hub drive a generator through a gearbox of overall ratio 1:50. The induction generated is connected directly to the 60 Hz network and keeps the high speed shaft at 1500 RPM. Ignoring all other loses, calculate CP, lamda, rotor tip speed, and torque on low and high sides of the shaft.

  • A 20-m/sec wind speed enters a two-bladed, high speed wind turbine .What should be the rotor...

    A 20-m/sec wind speed enters a two-bladed, high speed wind turbine .What should be the rotor diameter of this turbine to attain power of 100 kW at power coefficient of 0.3? Also calculate the rotor speed and torque produced. Assume the density of Air 1.2 kg/m.

  • A wind turbine with a blade diameter of 50 m, tower height of 60 m and...

    A wind turbine with a blade diameter of 50 m, tower height of 60 m and wind speed of 10 m/s at ground level and the air density is 1.23 kg/m3 is operating. Calculate the actual power that can be harnessed from this wind turbine.

  • 8 blade turbine ,a wind speed of 36 km/h to pump water at the rate of...

    8 blade turbine ,a wind speed of 36 km/h to pump water at the rate of 6m3/h, with a lift of 6m, efficiency pump 50% and efficiency rotor to the pump 80% , power coefficient 0.3 and the tip speed ratio is 1.0.Density of water 1000kg/m3, air 1.2kg/m3 and g = 9.81 m/s2. 1= the radius of the rotor (m) 2= the rotational speed of the rotor( rpm)

  • -1. Consider a wind turbine of diameter 52 m. At a wind speed 16 m/s, the...

    -1. Consider a wind turbine of diameter 52 m. At a wind speed 16 m/s, the wind turbine reaches is maximum power output of 850 kW. What is the coefficient of performance at this wind speed?

  • The rotor diameter of the wind turbine rotating at 20 rpm in winds of 30 km/h...

    The rotor diameter of the wind turbine rotating at 20 rpm in winds of 30 km/h is 80 m. What is the annual revenue generated by wind turbines if 35% of the kinetic energy of the wind is converted into power, (a) the power generated (kW), (b) wing end speed (km/h) (c) is supplied to the consumer at $0.06 kWh? At this time, the density of the air is 1.225 kg/m3.

  • The rated output power for a turbine model at 15 m/s is 3 MW. The rotor...

    The rated output power for a turbine model at 15 m/s is 3 MW. The rotor diameter is 90m.The rotor rotates at a constant frequency of 0.198 Hz. Please calculate the tip to speed ratio and power conversion coefficient of this mode. (5 Marks)

  • 2. A wind turbine has the maximum power output at the rated speed of 12 m/s...

    2. A wind turbine has the maximum power output at the rated speed of 12 m/s and a rotor diameter of 82 meters. The cut-in and cut-out speeds for this type of wind turbine are 4 m/s and 23 m/s, respectively. The table below shows the annual wind data near a potential site for setting up a wind farm using this type of wind turbine and the power coefficient of the wind turbine at the specific wind speed. The air...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT