Analytical approximation of optimal thermoeconomic efficiencies for a Novikov engine with a Stefan–Boltzmann heat transfer law

From a semi-analytical method, analytical expressions for the optimal thermoeconomic efficiencies are found for a Novikov model using a radiative heat transfer law. All this is within the context of finite-time thermodynamics for the three modes of operation: maximum power, ecological regime, and efficient power regime. The analysis includes fuel-related costs and operation and maintenance costs of the power plants that can be studied from the model considered. The obtained expressions are a reasonable approximation compared with the optimum efficiencies numerical results.