On the analysis of an ecological regime for energy converters

Optimal efficiencies of an isothermal endoreversible chemical engine

“…Therefore, T 2w can be taken to be T 2 , there will be no heat flow between the lower reservoirs, and Q 2 will flow directly from the internal system to the sink. From the perspective of [30] and references therein, it is assumed that the variables, such as Q 1 and W, are quantities per cycle period. Under these assumptions, it is possible to obtain η CA in a simplified way as shown below.…”

“…Once both dissipation and power output are calculated at the values of the efficiencies η P and η E , it is found that the ecological regime is less dissipative. Still, there is a considerable decrease in power output [29,30]. By operating under the ecological regime, there is a gain for the environment at the cost of power output loss.…”

“…By operating under the ecological regime, there is a gain for the environment at the cost of power output loss. This criterion is called ecological since its objective is to leverage resources and reduce the heat released to the environment [26,29,30]. In Ref.…”

“…Once again, (14) has a concave behavior over the interval [0, η c ], and has absolute extreme values. The values of the efficiency as a function of τ that maximize (14) are given by [27,28,30] ( ) ( )…”

“…It can now be constructed as the quotient of the objective functions of different operating regimes and the cost function with other added terms For instance, in [25], the maximum power [14], ecological [26], and efficient power [27,28] operating regimes were considered, and the authors added a term to the cost function corresponding to the operation and maintenance costs of the energy converter. These performing regimes are built over a specific desired output and are commonly used in thermodynamic optimization studies of endoreversible cycles [29,30].…”