2019/12/30 by M. Ponmurugan, Ponmurugan, M.
Physics and Astronomy · Chemistry · Engineering · #Advanced Thermodynamics and Statistical Mechanics #thermodynamics and calorimetric analyses #Phase Equilibria and Thermodynamics
paper · pdf · doi:10.48550/arxiv.1912.12949
We identify a realistic model of thermal heat engines and obtain the generalized efficiency, η= 1- ((Tc)/(Th))1/δ, where δ=1+\frac1γ and γ is the ratio of thermal heat capacities of working substance at two thermal stages of the hot heat reservoir temperature, Th and the cold heat reservoir temperature, Tc. We find that the observed efficiency of practical heat engines satisfy the above generalized efficiency with 1/δ=0.35594 ± 0.07. The Curzon-Ahlborn efficiency, ηCA=1-((Tc)/(Th))1/2 is obtained for the symmetric case, γ=1. The generalized efficiency approaches the Carnot efficiency, ηC=1-(Tc)/(Th), in the asymmetric limit, γ→ ∞.