2016
DOI: 10.1103/physreve.93.032125
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Abstract: Two-reservoir thermochemical engines are established in by using near-independent particles (including Maxwell-Boltzmann, Fermi-Dirac, and Bose-Einstein particles) as the working substance. Particle and heat fluxes can be formed based on the temperature and chemical potential gradients between two different reservoirs. A rectangular-type energy filter with width  is introduced for each engine to weaken the coupling between the particle and heat fluxes. The efficiency at maximum power of each particle system d… Show more

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Cited by 7 publications
(4 citation statements)
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“…Most interesting is the evaluation of the performance of the c-2QD as heat engine, in this case a study of the efficiency at the maximum output power is required. Several recent papers [32][33][34][35][36][37] have shown that the mere knowledge of the maximum efficiency of a heat engine is of limited importance since the useful operative information concerns the conditions corresponding to the maximum power output. 38,39 It is known in fact,that even if the figure of merit ZT of a thermoelectric device can assume large values (>>1) mainly for nanostructured systems 9,40,41 , what really matters is just the efficiency evaluated at the maximum power output.…”
Section: Resultsmentioning
confidence: 99%
“…Most interesting is the evaluation of the performance of the c-2QD as heat engine, in this case a study of the efficiency at the maximum output power is required. Several recent papers [32][33][34][35][36][37] have shown that the mere knowledge of the maximum efficiency of a heat engine is of limited importance since the useful operative information concerns the conditions corresponding to the maximum power output. 38,39 It is known in fact,that even if the figure of merit ZT of a thermoelectric device can assume large values (>>1) mainly for nanostructured systems 9,40,41 , what really matters is just the efficiency evaluated at the maximum power output.…”
Section: Resultsmentioning
confidence: 99%
“…Solving these equations for ϵ ta2 and maximizing P under the constraint ϵ = ϵ ta2 (Lθ) with respect to Lθ (cf the calculations in chapter 4), this also leads to the results (32) and (33) for power and efficiency, respectively. Application of the double tangent method also seems possible with weakening of the strong coupling condition by using a broadband energy filter with a step-like energy distribution τ(ϵ) in equations ( 1) and (2) [40,41], for example in the energy range ϵ in ⩽ ϵ ⩽ ϵ ta2 for engine mode. Since by the double tangent construction ϵ ta2 = ϵ in in the limiting case η C = 0, the resulting efficiency therefore also exhibits Carnot behavior to the lowest order of η C .…”
Section: Discussionmentioning
confidence: 99%
“…The probabilities for the carrier transport in the QD-and QW-ESCs depend on the momentums and the directions of excited electrons. The transmission of electrons via the QD-ESC is determined by the electron momentum vectors in the three-dimension space [19,22], while the QW-ESCs allow electrons to transmit according to their momentums in the direction of the transport only.…”
Section: Model Descriptionmentioning
confidence: 99%