Engineering, 24.10.2019 18:43 promathninja20
Air expands through a turbine operating at steady state. at the inlet, p1 = 150 lbf/in.2, t1 = 1400°r, and at the exit, p2 = 14.8 lbf/in.2, t2 = 900°r. the mass flow rate of air entering the turbine is 11 lb/s, and 65,000 btu/h of energy is rejected by heat transfer. neglecting kinetic and potential energy effects, determine the power developed, in hp.
Answers: 1
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?
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Engineering, 04.07.2019 18:20
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Engineering, 04.07.2019 19:10
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Engineering, 04.07.2019 19:20
Heat transfer by is the fastest mode of heat transfer that requires no intervening medium. a)-conduction b)-convection c)-radiation d)-conduction and convection
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Air expands through a turbine operating at steady state. at the inlet, p1 = 150 lbf/in.2, t1 = 1400°...
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