Calculating Efficiency of Diesel Cycle

AI Thread Summary
The discussion focuses on calculating the efficiency of a diesel cycle using known parameters such as pressures, volumes, and specific heat capacities. The user is uncertain about how to determine the temperatures T2, T3, and T4, which are crucial for efficiency calculations. They have already computed the work done for each stage but are struggling to integrate the specific gas constant and compression index into their calculations. The user seeks guidance on the next steps to effectively calculate the cycle's efficiency. Resources like Wikipedia and HyperPhysics are referenced for additional information.
newe999
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1. Homework Statement
given:
diesel cycle,
P1V1 P2V2 P3V3 P4V4 - all known
T1 = 20°c
specific heat capacity constant pressure = 1000j/kgk
specific gas constant = 287j/kgk
compression index = 1.4

2. Homework Equations
heres where i am stuck!


3. The Attempt at a Solution
Hi all, I am unsure where to go with this one. I am guessing that i need to work out T2.T3.T4, but can't find in any of my notes where any of the γ or R come into play or how to get T2T3T4?. i have already calculated the work done for each stage in a previous part of the question so i have that. Just not too sure on where to go from here to calculate the efficiency of the cycle?
 
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