Ex: A centrifugal pump delivers (0.07 m³/s) of water at (1500 rpm) and the velocity of flow through the impeller at exit is (3m/s). The impeller diameter at inlet and out let are (0.18&0.027) respectively, and blades are curved back with an angle of 25° to the tangent at exit (the blade angle is 155° with the direction of motion). The diameter of the section and delivery pipes are (0.15 & 0.1m) respectively. The absolute pressure head at section is (6.5 m) and that at delivery is (29 m). the power taken by the pump is (35 hp). Calculate the van angle at the inlet, the overall efficiency and the monomeric efficiency and the losses across the pump.

Ex: A centrifugal pump delivers (0.07 m³/s) of water at (1500 rpm) and the velocity of flow through the impeller at exit is (3m/s). The impeller diameter at inlet and out let are (0.18&0.027) respectively, and blades are curved back with an angle of 25° to the tangent at exit (the blade angle is 155° with the direction of motion). The diameter of the section and delivery pipes are (0.15 & 0.1m) respectively. The absolute pressure head at section is (6.5 m) and that at delivery is (29 m). the power taken by the pump is (35 hp). Calculate the van angle at the inlet, the overall efficiency and the monomeric efficiency and the losses across the pump.

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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