Please show the complete solution. 4.The pump of a water distribution system is poweredby a 15-kW electric motor whose efficiency is 90 percent.300 kPaPumpWater100 kPa50 L/spumpmotor- 90%Motor15 kWAnswer:%The water flow rate through the pump is 50 L/s. The diame-ters of the inlet and outlet pipes are the same, and the eleva-tion difference across the pump is negligible. If the pressuresat the inlet and outlet of the pump are measured to be 100kPa and 290Kpa (absolute), respectively, determine themechanical efficiency of the pump.

Given Pressure, P2 = 100 kPa P1 = 290 kPa Flow rate, Q = 50 L/s…

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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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Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.

Question

Please show the complete solution.

4.
The pump of a water distribution system is powered
by a 15-kW electric motor whose efficiency is 90 percent.
300 kPa
Pump
Water
100 kPa
50 L/s
pump
motor
- 90%
Motor
15 kW
Answer:
%
The water flow rate through the pump is 50 L/s. The diame-
ters of the inlet and outlet pipes are the same, and the eleva-
tion difference across the pump is negligible. If the pressures
at the inlet and outlet of the pump are measured to be 100
kPa and 290Kpa (absolute), respectively, determine the
mechanical efficiency of the pump.

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