scholarly journals Finite-Time Thermoeconomic Optimization of a Solar-Driven Heat Engine Model

Entropy ◽  
2011 ◽  
Vol 13 (1) ◽  
pp. 171-183 ◽  
Author(s):  
Marco A. Barranco-Jimenez ◽  
Norma Sanchez-Salas ◽  
Fernando Angulo-Brown
Keyword(s):  
Finite Time ◽  
Heat Engine ◽  
Engine Model

Finite-time optimization of a solar-driven heat engine

Solar Energy ◽  
1996 ◽  
Vol 56 (6) ◽  
pp. 617-620 ◽  
Author(s):  
Selahattın Gök Tun
Keyword(s):  
Finite Time ◽  
Heat Engine ◽  
Time Optimization

The Role of Internal Irreversibilities in the Performance and Stability of Power Plant Models Working at Maximum ϵ-Ecological Function

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Gabriel Valencia-Ortega ◽  
Sergio Levario-Medina ◽  
Marco Antonio Barranco-Jiménez
Keyword(s):  
Power Plants ◽  
Heat Engine ◽  
Combined Cycle ◽  
Ecological Function ◽  
Operating Conditions ◽  
Maximum Efficiency ◽  
Working Fluid ◽  
Engine Model ◽  
Improved Stability ◽  
The Stability

Abstract The proposal of models that account for the irreversibilities within the core engine has been the topic of interest to quantify the useful energy available during its conversion. In this work, we analyze the energetic optimization and stability (local and global) of three power plants, nuclear, combined-cycle, and simple-cycle ones, by means of the Curzon–Ahlborn heat engine model which considers a linear heat transfer law. The internal irreversibilities of the working fluid measured through the r-parameter are associated with the so-called “uncompensated Clausius heat.” In addition, the generalization of the ecological function is used to find operating conditions in three different zones, which allows to carry out a numerical analysis focused on the stability of power plants in each operation zone. We noted that not all power plants reveal stability in all the operation zones when irreversibilities are considered through the r-parameter on real-world power plants. However, an improved stability is shown in the zone limited by the maximum power output and maximum efficiency regimes.

A heat engine model of a reversible computation

1990 ◽  
Vol 78 (5) ◽  
pp. 817-825 ◽  
Author(s):  
D.G. Jablonski
Keyword(s):  
Heat Engine ◽  
Reversible Computation ◽  
Engine Model

Analysis on the Performance of a Thermoelectric Generator

1999 ◽  
Vol 122 (2) ◽  
pp. 61-63 ◽  
Author(s):  
Jincan Chen ◽  
Chih Wu
Keyword(s):  
Power Output ◽  
Physical Meaning ◽  
Design Parameter ◽  
Thermoelectric Generator ◽  
Heat Engine ◽  
Simple Expression ◽  
Maximum Efficiency ◽  
Thermoelectric Generators ◽  
Optimal Range ◽  
Engine Model

An externally and internally irreversible heat engine model of thermoelectric generators is used to analyze the so-called device-design parameter introduced by O¨zkaynak et al. The simple expression of the parameter is given and its physical meaning is expounded. Moreover, the optimal range of the parameter is determined and the problems relative to the maximum power output and maximum efficiency are discussed. Some meaningful results are obtained. [S0195-0738(00)00401-5]

scholarly journals Optimal temperatures and maximum power output of a complex system with linear phenomenological heat transfer law

2009 ◽  
Vol 13 (4) ◽  
pp. 33-40 ◽  
Author(s):  
Lingen Chen ◽  
Jun Li ◽  
Fengrui Sun
Keyword(s):  
Complex System ◽  
Heat Transfer ◽  
Power Output ◽  
Finite Time ◽  
Heat Engine ◽  
Thermal Capacity ◽  
Maximum Power ◽  
Finite Time Thermodynamics ◽  
Maximum Power Output ◽  
Different Temperatures

A complex system including several heat reservoirs, finite thermal capacity subsystems with different temperatures and a transformer (heat engine or refrigerator) with linear phenomenological heat transfer law [q ? ?(T -1)] is studied by using finite time thermodynamics. The optimal temperatures of the subsystems and the transformer and the maximum power output (or the minimum power needed) of the system are obtained.

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