(6 points) An ideal Diesel cycle operates with a compression ratio of 24 and a cutoff ratio of 1.8. At the beginning of the compression process, the air is at 14.4 psia and 90°F. Accounting for variable specific heats with temperature, determine: the maximum temperature during the cycle °F the maximum pressure during the cycle psia the specific net work output Btu/lbm the mean effective pressure (MEP) for the cycle psia the thermal efficiency % What is the thermal efficiency of this Diesel cycle if the cold-air standard assumption is used? %

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(6 points) An ideal Diesel cycle operates with a compression ratio of 24 and a cutoff ratio of 1.8. At the beginning of the compression
process, the air is at 14.4 psia and 90°F.
Accounting for variable specific heats with temperature, determine:
the maximum temperature during the cycle
°F
the maximum pressure during the cycle
psia
the specific net work output
Btu/lbm
the mean effective pressure (MEP) for the cycle
psia
the thermal efficiency
%
What is the thermal efficiency of this Diesel cycle if the cold-air standard assumption is used?
%
Transcribed Image Text:(6 points) An ideal Diesel cycle operates with a compression ratio of 24 and a cutoff ratio of 1.8. At the beginning of the compression process, the air is at 14.4 psia and 90°F. Accounting for variable specific heats with temperature, determine: the maximum temperature during the cycle °F the maximum pressure during the cycle psia the specific net work output Btu/lbm the mean effective pressure (MEP) for the cycle psia the thermal efficiency % What is the thermal efficiency of this Diesel cycle if the cold-air standard assumption is used? %
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