a) At the beginning of the compression process of an air-standard Diesel cycle operating with a compression ratio of 18, the temperature is 300 K, and the pressure is 0.1 MPa. The cutoff ratio for the cycle is 2. Calculate the followings, i) ii) iii) the temperature and pressure at the end of each process of the cycle, the thermal efficiency, the mean effective pressure, in MPa. Hint: Assume air to be ideal gas with constant properties (k=1.4 and c₂=0.4 kJ Kg.K' C₂ = 1₂
a) At the beginning of the compression process of an air-standard Diesel cycle operating with a compression ratio of 18, the temperature is 300 K, and the pressure is 0.1 MPa. The cutoff ratio for the cycle is 2. Calculate the followings, i) ii) iii) the temperature and pressure at the end of each process of the cycle, the thermal efficiency, the mean effective pressure, in MPa. Hint: Assume air to be ideal gas with constant properties (k=1.4 and c₂=0.4 kJ Kg.K' C₂ = 1₂
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:a) At the beginning of the compression process of an air-standard Diesel cycle operating
with a compression ratio of 18, the temperature is 300 K, and the pressure is 0.1 MPa.
The cutoff ratio for the cycle is 2.
Calculate the followings,
i)
ii)
iii)
the temperature and pressure at the end of each process of the cycle,
the thermal efficiency,
the mean effective pressure, in MPa.
Hint: Assume air to be ideal gas with constant properties (k=1.4 and c₂=0.4-
kJ
Kg.K'
i)
ii)
b) What is the effect of turbine and compressor irreversibility of a turbojet engine on the
followings.
i)
ii)
kJ
Kg.K
The propulsive power,
the fuel consumption.
Cp=1_
Without doing any calculations, briefly explain your reasons. Note that your answer
to each of questions bi and bii should not exceed 50 words.
c) Consider a simple idea Rankin cycle with fixed turbine inlet conditions. What is the effect
of lowering the condenser pressure on the followings.
Pump work input,
turbine work output
Without doing any calculations, briefly explain your reasons. Note that your answer
to each of questions ci and cii should not exceed 50 words.
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Step 1: Given data
VIEWStep 2: Draw PV & TS diagrams and calculate temperature and pressure at the second stage of the cycle
VIEWStep 3: Calculate the temperature and pressure at the third stage of the cycle
VIEWStep 4: Calculate the temperature and pressure at the fourth stage of the cycle
VIEWStep 5: Calculation of the thermal efficiency and the mean effective pressure
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