A pump at a power plant supplies water to the boiler at a flow rate of 1,000 gal/min, measured at the pump inlet. Water enters the pump at 185 psig and 300 F. The pump discharge pressure is 2,985 psig. The isentropic efficiency of the pump is 70%. What is the required pump input power in HP? (Assume atmospheric pressure is 15 psia.) 1500 HP 2500 HP 2000 HP 2300 HP 1700 HP 1200 HP

A pump at a power plant supplies water to the boiler at a flow rate of 1,000 gal/min, measured at the pump inlet. Water enters the pump at 185 psig and 300 F. The pump discharge pressure is 2,985 psig. The isentropic efficiency of the pump is 70%. What is the required pump input power in HP? (Assume atmospheric pressure is 15 psia.) 1500 HP 2500 HP 2000 HP 2300 HP 1700 HP 1200 HP

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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10. A centrifugal pump operating under steady-flow conditions 2.28 m/min of water with a specific volume of 0.001 m³/kg from an initial pressure of 84 kPa to a final pressure of 280 kPa. The diameter of the suction inlet to the pump is 15 cm and the diameter of the discharge outlet is 10 cm. If the suction and discharge lines are at the same level, and no change in internal energy, determine the work (hp) done on the water by the pump. Ans. 10.46 hp 3
IMPORTANT NOTE: THE VALUE OF K IS 865 (K=865). PLEASE ANSWER ASAP THANK YOU!!
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Q1.2 Consider a two-stage compression refrigeration system operating between the pressure limits of 0.8and0.14 MPa(see Fig. Q 2). The working fluid isrefrigerant -134a. The refrigerant leaves thecondenser as a saturated liquid and is throttled to aflash chamberoperating at0.4 MPa. Part ofthe refrigerant evaporates during this flashing process, and this vapour is mixed with the refrigerantleaving the low-pressure compressor. The mixture is then compressed to the condenser pressure bythe high-pressure compressor. The liquid in the flash chamber is throttled to the evaporator pressure,and it cools the refrigerated space as it vaporizes in the evaporator. Assuming the refrigerant leavesthe evaporator as saturated vapor and both compressors are isentropic, determine(a) the coefficient of performance (COP).Re-draw the schematic diagram and sketch the cycle accurately on a T-s diagram with the propertyvalues labelled at all state points.