4. For Francis turbine with the following specifications: Pdev 225 MW, H=250 m, nov= 90 % , If the velocity of water at spiral case entering =24 m/s, and the volumetric efficiency is 0.98, thus the diameter of the spiral case entering is: a. 2.3 m. b. 2.8 m. c. 3.1 m.

4. For Francis turbine with the following specifications: Pdev 225 MW, H=250 m, nov= 90 % , If the velocity of water at spiral case entering =24 m/s, and the volumetric efficiency is 0.98, thus the diameter of the spiral case entering is: a. 2.3 m. b. 2.8 m. c. 3.1 m.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter40: Typical Operating Conditions

Section: Chapter Questions

Problem 10RQ: The seasonal energy efficiency ratio (SEER) includes the energy used in the _____and _____cycles.

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Question

4. For Francis turbine with the following specifications: Paev= 225 MW, H=250
m, nov= 90 % , If the velocity of water at spiral case entering =24 m/s, and
the volumetric efficiency is 0.98, thus the diameter of the spiral case entering
is:
a. 2.3 m.
b. 2.8 m.
c. 3.1 m.
d. 3.6 m.
e. None of them.

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4. For Francis turbine with the following specifications: Pdev= 225 MW, H=250 m , nov= 90 % , If the velocity of water at spiral case entering =24 m/s, and the volumetric efficiency is 0.98, thus the diameter of the spiral case entering is: а. 2.3 m. b. 2.8 m. с. 3.1 m. d. 3.6 m. e. None of them.
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