Question

An ideal Diesel cycle has a cut off ratio of 2. The temperature of the air...

An ideal Diesel cycle has a cut off ratio of 2. The temperature of the air at the beginning and
at the end of the compression process are 300 K and 900 K respectively. By utilizing constant
specific heats, taking the specific heat ratio, k = 1.4, Cp = 1.005 kJ/kg K and Cv = 0.718 kJ/kg
K. Determine the followings:
(i) The compression ratio. [5 marks]
(ii) The maximum cycle temperature. [5 marks]
(iii) The amount of heat transferred in (in kJ) if the pressure and volume
of the air at the beginning of the compression process are 200 kPa and
1815 cm3
respectively. [5 marks]
(iv) The thermal efficiency. [7 marks]
(v) The mean effective pressure (MEP) [5 marks]
(vi) Show the cycle on P-v diagram [3 marks]

Homework Answers

Answer #1

Drawing the P-V diagram and then finding out compression ratio we can all parts easily. I have shown below-

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