Answered: of 28.4 m / s through a 150 mm diameter…

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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Question

CO2 enters a compressor at 1 bar, 34 ° C, with a velocity of 28.4 m / s through a 150 mm diameter pipe located 7 m below the discharge line and exits at 8 bar and 265 ° C through a 120 mm diameter pipe. The heat losses are 4.5 kJ / kg. It is asked to calculate:
Data:
CP = 0.85 kJ / kg. °C
Molar mass = 44
Local electricity tariff = S /. 0.2780 / kWh

a) The velocity of the gas at the outlet, in m / s
b) The mechanical power (shaft), if the compression efficiency is 78%, in kW
c) If the compressor must deliver 15,000 m3 of compressed air per day, continuously, what consumption (kWh) and what monthly cost (S /.) Does this compressor originate, if the efficiency of its motor is 80%?

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