Engineering, 22.02.2020 04:16 michaellangley
A reversible compression of 1 mol of an ideal gas in a piston/cylinder device results in a pressure increase from 1 bar to P2 and a temperature increase from 500 K to 1000 K. The path followed by the gas during compression is given by:
PV1.55 = constant
and the molar heat capacity of the gas is given by:
CP/R = 3.30 + 0.63x10-3 T (T in K)
Determine the final pressure and the heat transferred during the process.
Answers: 2
Engineering, 04.07.2019 18:10
Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?
Answers: 1
Engineering, 04.07.2019 18:10
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Answers: 1
Engineering, 04.07.2019 18:10
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Engineering, 04.07.2019 18:20
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A reversible compression of 1 mol of an ideal gas in a piston/cylinder device results in a pressure...
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