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bill nye scienceguy!
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ice as in internal combustion engine, sorry for confusion
I'm given an engine operating on the dual cycle and asked to find the thermal efficiency and the mean effective pressure. the compression ratio is 18:1, the temperature at the start of the compression 300K and the pressure is 100kN/m^2. the pressure ratio for the constant volume part of the heating process is 1.5:1 and the volume ratio for the constant pressure part is 1.2:1. I am taking gamma to be 1.4.
compression ratio = rv
pressure ratio = a
volume ratio = rc
gamma = y
eff. = 1 - (1/rv^(y-1))[((a.rc^y)-1/((a-1) + ya(rc-1))]
I found the efficiency to be 67.9% but now i need to find the mean effective pressure and I am stuck. obviously i know its work output over swept volume but I am at a loss to find either for the dual cycle.
help please.
Homework Statement
I'm given an engine operating on the dual cycle and asked to find the thermal efficiency and the mean effective pressure. the compression ratio is 18:1, the temperature at the start of the compression 300K and the pressure is 100kN/m^2. the pressure ratio for the constant volume part of the heating process is 1.5:1 and the volume ratio for the constant pressure part is 1.2:1. I am taking gamma to be 1.4.
Homework Equations
compression ratio = rv
pressure ratio = a
volume ratio = rc
gamma = y
eff. = 1 - (1/rv^(y-1))[((a.rc^y)-1/((a-1) + ya(rc-1))]
The Attempt at a Solution
I found the efficiency to be 67.9% but now i need to find the mean effective pressure and I am stuck. obviously i know its work output over swept volume but I am at a loss to find either for the dual cycle.
help please.
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