21. In a repair shop compressed air is used to operate pneumatic tools. The total length of the airline including all the loss coefficients in terms of equivalent air is about 500 ft. The airline consists of smooth pipe of I.D. = 0.5 inch. The com- pressed air is cooled to 75 F when entering the line. A pneumatic tool requires 35 psia of compressed air to operate. To what pressure should the air be pressurized by a compressor to provide the desired pressure for the tool? What power is required to obtain such pressure if the compression process can be assumed isentropic? Air ve- looity ot the inlet ic 10 &le

Elements Of Electromagnetics
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PROBLEM: IIC-21

BOOK: ENGINEERING THERMOFLUIDS, M. MASSOUD

21. In a repair shop compressed air is used to operate pneumatic tools. The total
length of the airline including all the loss coefficients in terms of equivalent air is
about 500 ft. The airline consists of smooth pipe of I.D. = 0.5 inch. The com-
pressed air is cooled to 75 F when entering the line. A pneumatic tool requires 35
psia of compressed air to operate. To what pressure should the air be pressurized by
a compressor to provide the desired pressure for the tool? What power is required to
obtain such pressure if the compression process can be assumed isentropic? Air ve-
locity at the inlet is 10 ft/s.
Transcribed Image Text:21. In a repair shop compressed air is used to operate pneumatic tools. The total length of the airline including all the loss coefficients in terms of equivalent air is about 500 ft. The airline consists of smooth pipe of I.D. = 0.5 inch. The com- pressed air is cooled to 75 F when entering the line. A pneumatic tool requires 35 psia of compressed air to operate. To what pressure should the air be pressurized by a compressor to provide the desired pressure for the tool? What power is required to obtain such pressure if the compression process can be assumed isentropic? Air ve- locity at the inlet is 10 ft/s.
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