Influence of the compression ratio, degree of elevation of the pressure and degree of previous expansion in the thermal efficiency of the TRINKLER cycle

Abstract

Objective.Influence of the compression ratio, degree of elevation of the pressure and degree of previous expansion in the indicated net work and efficiency in the TRINKLER cycle.

Materials and methods.The research design is descriptive, transversal. The population was conformed by the values of the determined yields through development of the general equation.

Results. The Trinker cycle has a better performance approximation for the Diesel cycle (variation percentage around 0.9%) than for the Otto cycle(percentage variation around 5.0%). In addition there is a tendency to increase the thermal efficiency for point values of the degree of previous expansion, for the case for ρ = 1.5 (minimum value) efficiencies are obtained from 53.3 to 68.8% and for the case for ρ = 3.0 (maximum value ) you get efficiencies from 43.9 to 62.6%. Maintaining in both cases the degree of pressure rise in 1.2. Finally we observed that the influence of the degree of pressure rise tends to increase the thermal efficiency, but in percentage terms it varies from a maximum of 2.4% (ε = 8) and a minimum of 1.2% (ε = 8).

Conclusion.For a given compression ratio, the thermal efficiency of the cycle decreases with increasing degree of previous expansion of the engine. As expected, thethermal efficiency increases with the compression ratio, which has more influence on the thermal efficiency, for a given degree of previous expansion ratio. If the value of the compression ratio does not vary, the thermal efficiency remains constant when the pressure ratio of the motor increases.