A cycle consists of two isochoric and two isothermal process. The volume variation Vmax / Vmin in the cycle is r fold while the temperature variation Tmax / Tmin is t (tou) fold. The ratio of specific heats for the working fluid is Y(gema).
show efficiency = {(t-1) ln(r) } / { t ln (r) + (t-1) / (y-1) }
given temperature ratio (t) what is the optimal compression ration (r) in this cycle?