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How to calculate the efficiency of a fuel engine
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[QUOTE="Imolopa, post: 5862405, member: 604002"] Yes I have had a subject in thermodynamics at university last year. However we havn't gone through combustion in that course, just barely. The equation from my thermodynamics book that we used in the course from a chapter that we did not go through is: W_cv - Q_cv = HV + delta H_r - delta H p + H_r0 - H_p0 My professor that don't know so much about thermodynamics in our lab course claimed that the following is true: H_r = H_p0 + HV is valid Also she claimed that HV here would be the energy content value found on the bottle/container of the fuel. I am simply wondering what I need in order to find the efficiency for the engine, in other words if it is correct to use the relation: efficiency = useful work output /.total energy input = W_cv / HV Where Work done by the engine is a value that is given. So in other words does HV represent the total energy input into the engine? [/QUOTE]
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How to calculate the efficiency of a fuel engine
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