Three-State Quantum Heat Engine Based on Carnot Cycle

Sutantyo, Trengginas Eka Putra

doi:10.25077/jfu.9.1.142-149.2020

Cited by 10 publications

(4 citation statements)

References 17 publications

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“…This condition only occurred on two eigen states of the particle in the cubic. At higher state, the particle would consist of more degenerate states but also there are completeness reduction which mean there should be more consideration to the condition of the particle as said in the research carried out by Sutantyo (2020). The performance of the quantum Lenoir engine in term of efficiency can be seen in Figure 5.…”

Section: Resultsmentioning

confidence: 99%

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Effects of State Degeneration in 3D Quantum Lenoir Engine Performance

Ade

Sutantyo

2022

JIF

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We study the performance of the quantum Lenoir engine using single-particle confined within the cubic potential. In 3D potential structure, particles degenerate into multiple states at identic energy level which occurs on the excitation state of the particles. Deliberating the degeneration effects, the confined particle has possibility to produce more energy efficiency as engine’s working substance. The particle is able to freely move in three directions of x, y, and z-axis simultaneously, which gives three degrees of freedom to the particle in the cubic potential. By limiting to two eigen states, a basic explanation to the condition of the particle was provided. The efficiency of 3D quantum Lenoir engine is better than the classical model of the Lenoir engine despite the similarity in the formulation. Moreover, we also consider the efficiency comparison between the 3D model, with some state modifications, and the 1D efficiency of the quantum Lenoir engine. As expected, degeneration of the particle’s states plays a role in the enhancement of the quantum Lenoir engine’s efficiency. Moreover, we also derived the power output of the 3D quantum Lenoir engine. Thus, this study clearly gives a sight of the performance of quantum Lenoir engine model in the 3D manner.

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Section: Resultsmentioning

confidence: 99%

“…Since the volume changes simultaneously (dLx = dLy = dLz = dL) (Sutantyo, 2020), the initial force (F) of the particle is…”

Section: D Quantum Heat Enginementioning

confidence: 99%

Effects of State Degeneration in 3D Quantum Lenoir Engine Performance

Ade

Sutantyo

2022

JIF

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“…Moreover, in the quantum regime, the application of endoreversible shows respectfully better efficiency than the classical [4,9]. This idea can be applied to every thermodynamic cycle, following starting from Carnot cycle [15][16][17][18][19][20], Lenoir cycle [21][22][23], Otto cycle [3,[8][9][10][11][12][13]24], and Stirling cycle [25,26].…”

Section: Introductionmentioning

confidence: 99%

Performance of 3D quantum Otto engine with partial thermalization

Sutantyo,

Zettira,

Fahriza

et al. 2024

J. Phys.: Conf. Ser.

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We investigate the phenomenon of partial thermalization in the context of the efficiency at maximum power (EMP) for a quantum Otto engine. This engine utilizes Bose-Einstein Condensation in a cubic potential. The occurrence of partial thermalization is observed during a finite-time isochoric process, preventing the system from reaching an equilibrium state with the reservoirs and leaving it in a state of residual coherence. The engine’s performance can be evaluated based on its power output and EMP. The cubic potential is employed to induce energy excitation during the expansion and compression phases. The total energy is determined by the work done over a complete cycle. Utilizing Fourier’s law for heat conduction, we have determined that the power output is explicitly influenced by the duration of the heating and cooling strokes as well as the engine’s efficiency. Specifically, a longer stroke time and higher efficiency result in reduced power output. To calculate EMP, we optimize power by varying the compression ratio (κ), and we have found that EMP is also influenced by the isochoric heating and cooling processes. When varying the duration of the isochoric process, EMP shows a slight decrease as isochoric time increases due to entropy production. However, significant improvements in the EMP of the Otto Engine can be achieved by extending the cooling stroke time beyond the heating stroke time.

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“…Various cases have been studied using infinite potential well systems such as box potential well with movable walls (Koehn, 2012) and box potential well with oscillating wall (Glasser et al, 2009). Furthermore, the infinite potential well is also used as a model to describe the quantum heat engine system (Bender et al, 2000;Rezek & Kosloff, 2006;Thomas et al, 2019;Xu et al, 2018;Muñoz & Peña, 2012;Sutantyo, 2020;Sutantyo et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Infinite spherical well as model of quantum carnot engine

2023

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The potential well is a simple example that generally used to present an understanding of quantum mechanics. In this article, we used infinite spherical well model to evaluate the thermodynamic processes in a quantum Carnot engine. The energy of the particles depended on the value of n and l lead to complex calculations. For simplicity we used the φ100 and φ200 quantum states to determine work and efficiency of a quantum Carnot machine. The results obtained show that efficiency depends on the value of which is the ratio of RC and RB.

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Three-State Quantum Heat Engine Based on Carnot Cycle

Cited by 10 publications

References 17 publications

Effects of State Degeneration in 3D Quantum Lenoir Engine Performance

Effects of State Degeneration in 3D Quantum Lenoir Engine Performance

Performance of 3D quantum Otto engine with partial thermalization

Infinite spherical well as model of quantum carnot engine

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