Engineering, 22.08.2019 00:30 Annabel9554
Afour stroke gasoline engine has a compression ratio of 10: 1 with 4 cylinders of total displacement 4.2 l. the inlet state is 100 k, 90 kpa and the engine is running at 3200 rpm with the fuel adding 1500 kj/kg in the combustion process. what is the network in the cycle and how much power is produced?
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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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Afour stroke gasoline engine has a compression ratio of 10: 1 with 4 cylinders of total displacement...
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