Engineering, 12.03.2021 15:20 Arealbot
A 5.6L V8 CI engine has a compression ratio of 20.0 and a crevice volume of 5% of clearance volume. During the engine cycle, crevice volume pressure equals combustion chamber pressure while remaining at the cylinder wall temperature of 180C. Cylinder conditions at the start of compression are 60C and 140 kPa and peak temperature is 12,000 kPa. Cutoff ratio is 2.2. Calculate:
1. Crevice volume of one cylinder
2. Percent of air-fuel mixture in the crevice volume at the end of compression
3. Percent of air-fuel mixture in the crevice volume at the end of combustion
Answers: 1
Engineering, 04.07.2019 18:10, QueenLife4869
Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.
Answers: 3
Engineering, 04.07.2019 18:20, Doogsterr
For each of the following process: a) sketch the p-v diagram, b)sketch t-s diagram, c) sketch t-v diagram, d) sketch the boundary work on one of the diagrams (a, b or c) and e) sketch the reversible heat transfer on one of the diagrams (a, b or c): 1- isobaric process from compressed liquid to superheated vapor 2- isothermal process from compressed liquid to superheated vapor 3- isentropic process from compressed liquid to superheated vapor
Answers: 3
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