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M.A. Barranco-Jiménez
Departamento de Formación Básica, Escuela Superior de Cómputo del Instituto Politécnico Nacional, Av. Juan de Dios Bátiz s/n. UP Zacatenco, CP 07738

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Journal article
Published: 20 February 2021 in Physica A: Statistical Mechanics and its Applications
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The analysis of the effect of noisy perturbations on real heat engines working on the well-known steady-state regimes (maximum power output, maximum efficient power, etc.), has been a topic of interest within the context of Finite-Time Thermodynamics (FTT). In general, the small perturbation stability dynamics has been studied by considering some of the above-mentioned performance regimes. In this work, we intrinsically corroborate that the concepts of thermodynamic optimization and stability are not uncorrelated. On the other side, due to global stability dynamics opened an extension for the general study of thermal disturbances in endoreversible heat engines, we present a study of local and global stability analysis of a power plant model (the Curzon–Ahlborn model) operating on a generalized performance regime called k-efficient power. We also construct the Lyapunov functions to prove the global asymptotically stable behavior of this steady-state for the isothermal branches. In our study, we consider a Newtonian heat transfer law as well as the role of the k parameter in the evolution of perturbations to the heat fluxes. In general, the so-called restructured operation conditions show a better thermal stability dynamics than the original ones.

ACS Style

G. Valencia-Ortega; S. Levario-Medina; M.A. Barranco-Jiménez. Local and global stability analysis of a Curzon–Ahlborn model applied to power plants working at maximum k-efficient power. Physica A: Statistical Mechanics and its Applications 2021, 571, 125863 .

AMA Style

G. Valencia-Ortega, S. Levario-Medina, M.A. Barranco-Jiménez. Local and global stability analysis of a Curzon–Ahlborn model applied to power plants working at maximum k-efficient power. Physica A: Statistical Mechanics and its Applications. 2021; 571 ():125863.

Chicago/Turabian Style

G. Valencia-Ortega; S. Levario-Medina; M.A. Barranco-Jiménez. 2021. "Local and global stability analysis of a Curzon–Ahlborn model applied to power plants working at maximum k-efficient power." Physica A: Statistical Mechanics and its Applications 571, no. : 125863.

Journal article
Published: 20 February 2021 in Thermal Science and Engineering Progress
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The growing interest in leveling costs in electricity generation has led, on the one hand, to establish optimization criteria with economic parameters, and on the other, to study thermal stability for power plants models. In this work, a non-endoreversible heat engine model, as well as a non-linear heat transfer law (Dulong-Petit) are considered. Additionally, three performance regimes in the so-called profit function (aF) are analyzed: Maximum power output (P), maximum efficient power (Pη) and maximum generalized ecological function (E). By means of an approximate analytical expression for the efficiencies, we present local and global stability analysis for three different types of power plants (nuclear, combined-cycle and simple-cycle ones), including the most representative running costs (investment and fuel ones). We show that for less dissipative regimes (Pη and E), the disturbed internal temperatures return quickly to their respective steady states within the physical and economic intervals. This fact is best visualized by the direct Lyapunov method, i.e, there is no surface such that some steady state is globally asymptotically stable.

ACS Style

G. Valencia-Ortega; S. Levario-Medina; M.A. Barranco-Jiménez. Thermal stability analysis of nuclear and fossil fuel power plants including the Dulong-Petit heat transfer law and economic features. Thermal Science and Engineering Progress 2021, 23, 100879 .

AMA Style

G. Valencia-Ortega, S. Levario-Medina, M.A. Barranco-Jiménez. Thermal stability analysis of nuclear and fossil fuel power plants including the Dulong-Petit heat transfer law and economic features. Thermal Science and Engineering Progress. 2021; 23 ():100879.

Chicago/Turabian Style

G. Valencia-Ortega; S. Levario-Medina; M.A. Barranco-Jiménez. 2021. "Thermal stability analysis of nuclear and fossil fuel power plants including the Dulong-Petit heat transfer law and economic features." Thermal Science and Engineering Progress 23, no. : 100879.

Conference paper
Published: 01 January 2021 in Journal of Physics: Conference Series
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In 2000 Velasco et al [1] introduced a new optimization criterion for the CA-engine model in terms of a profitable type process in the operation of a power plant model. This approach is based on using the so-called saving function as a measure of possible reduction of undesired side effects in heat engine operation. Velasco et al [1] defined two saving functions; one associated with fuel consumption and another associated with thermal pollution, where each saving function takes into account three weight coefficients that measure the participation degree of the corresponding process in the optimization criterion. We made use of this criterion to analyse the Novikov's power engine model [2] but by using different heat transfer laws: Newtonian and Dulong-Petit (DP) heat transfer laws [3]. We compare our results with those reported by Velasco et al [1]. Our results show a saving in fuel consumption of approximately 44% and a reduction in thermal pollution of 42% with respect to the operating regime of maximum power, a value that is in agreement with some reported in the literature.

ACS Style

M A Barranco-Jiménez; J C Pacheco-Paez; F Angulo-Brown. Optimization of heat engines using different heat transfer laws by means of the method of saving functions. Journal of Physics: Conference Series 2021, 1723, 012066 .

AMA Style

M A Barranco-Jiménez, J C Pacheco-Paez, F Angulo-Brown. Optimization of heat engines using different heat transfer laws by means of the method of saving functions. Journal of Physics: Conference Series. 2021; 1723 (1):012066.

Chicago/Turabian Style

M A Barranco-Jiménez; J C Pacheco-Paez; F Angulo-Brown. 2021. "Optimization of heat engines using different heat transfer laws by means of the method of saving functions." Journal of Physics: Conference Series 1723, no. 1: 012066.

Journal article
Published: 30 May 2020 in Journal of Non-Equilibrium Thermodynamics
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The fundamental issue in the energetic performance of power plants, working both as traditional fuel engines and as combined-cycle turbines (gas-steam), lies in quantifying the internal irreversibilities which are associated with the working substance operating in cycles. The purpose of several irreversible energy converter models is to find objective thermodynamic functions that determine operation modes for real thermal engines and at the same time study the trade-off between energy losses per cycle and the useful energy. As those objective functions, we focus our attention on a generalization of the so-called ecological function in terms of an ϵ parameter that depends on the particular heat transfer law used in the irreversible heat engine model. In this work, we mathematically describe the configuration space of an irreversible Curzon–Ahlborn type model. The above allows to determine the optimal relations between the model parameters so that a power plant operates in physically accessible regions, taking into account internal irreversibilities, introduced in two different ways (additively and multiplicatively). In addition, we establish the conditions that the ϵ parameter must fulfill for the energy converter to work in an optimal region between maximum power output and maximum efficiency points.

ACS Style

Sergio Levario-Medina; Gabriel Valencia-Ortega; Marco Antonio Barranco-Jiménez. Energetic Optimization Considering a Generalization of the Ecological Criterion in Traditional Simple-Cycle and Combined-Cycle Power Plants. Journal of Non-Equilibrium Thermodynamics 2020, 45, 269 -290.

AMA Style

Sergio Levario-Medina, Gabriel Valencia-Ortega, Marco Antonio Barranco-Jiménez. Energetic Optimization Considering a Generalization of the Ecological Criterion in Traditional Simple-Cycle and Combined-Cycle Power Plants. Journal of Non-Equilibrium Thermodynamics. 2020; 45 (3):269-290.

Chicago/Turabian Style

Sergio Levario-Medina; Gabriel Valencia-Ortega; Marco Antonio Barranco-Jiménez. 2020. "Energetic Optimization Considering a Generalization of the Ecological Criterion in Traditional Simple-Cycle and Combined-Cycle Power Plants." Journal of Non-Equilibrium Thermodynamics 45, no. 3: 269-290.

Journal article
Published: 28 January 2020 in The European Physical Journal Plus
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The Curzon–Ahlborn (CA) efficiency is widely known in the finite-time thermodynamics. This CA efficiency has been found in a number of energy converters operating at diverse scales such as microscopic, mesoscopic and macroscopic levels under a maximum power regime. De Mey and De Vos (MV) proposed an array of thermal engines that in spite of using only linear heat transfer laws, it does not own the CA efficiency when performs at maximum power output. Such an array consists of two CA-like engines connected by a thermal conductor. Recently, a MV-like array of isothermal endoreversible chemical engines (IEC-MV array) was treated by us with endoreversible and thermoeconomic approaches by means of a decomposition method, which consists in the conversion of a non endoreversible array of coupled CA-engines into an equivalent set of uncoupled endoreversible engines sharing the same thermodynamic reservoirs. In this work, we extended the IEC-MV array towards a more general case including also both electric resistances and reservoirs. This MV-like array of isothermal-electrical endoreversible engines using once more the decomposition method leads to well-known properties of electric circuits. In the present analysis, we consider three different performance regimes: Maximum power output, maximum ecological function and maximum efficiency.

ACS Style

M. A. Barranco-Jiménez; A. Ocampo-García; F. Angulo-Brown. Thermodynamic analysis of an array of isothermal endoreversible electric engines. The European Physical Journal Plus 2020, 135, 1 -14.

AMA Style

M. A. Barranco-Jiménez, A. Ocampo-García, F. Angulo-Brown. Thermodynamic analysis of an array of isothermal endoreversible electric engines. The European Physical Journal Plus. 2020; 135 (2):1-14.

Chicago/Turabian Style

M. A. Barranco-Jiménez; A. Ocampo-García; F. Angulo-Brown. 2020. "Thermodynamic analysis of an array of isothermal endoreversible electric engines." The European Physical Journal Plus 135, no. 2: 1-14.

Conference paper
Published: 13 June 2019 in Journal of Physics: Conference Series
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In many engineering thermodynamics textbooks, for solving reversible thermal cycles such as Otto and Joule-Bryton ones, commonly a kind of hybrid approach is used. On one hand an ideal gas is used as working fluid, but on the other hand, some thermal properties as heat capacities and their ratio are taken from data tables corresponding to imperfect gases. This approach leads to contradictions with the true reversible formalism. In this work, we analyse two examples treated in some thermodynamics textbooks where we show some inconsistences in the solutions of the problems.

ACS Style

A Ocampo-García; M A Barranco-Jiménez; F Angulo-Brown. On some inconsistences between two accepted approaches to treat reversible thermal cycles. Journal of Physics: Conference Series 2019, 1221, 012045 .

AMA Style

A Ocampo-García, M A Barranco-Jiménez, F Angulo-Brown. On some inconsistences between two accepted approaches to treat reversible thermal cycles. Journal of Physics: Conference Series. 2019; 1221 (1):012045.

Chicago/Turabian Style

A Ocampo-García; M A Barranco-Jiménez; F Angulo-Brown. 2019. "On some inconsistences between two accepted approaches to treat reversible thermal cycles." Journal of Physics: Conference Series 1221, no. 1: 012045.

Journal article
Published: 18 December 2018 in Entropy
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As it is well known both atmospheric and mantle convection are very complex phenomena. The dynamical description of these processes is a very difficult task involving complicated 2-D or 3-D mathematical models. However, a first approximation to these phenomena can be by means of simplified thermodynamic models where the restriction imposed by the laws of thermodynamics play an important role. An example of this approach is the model proposed by Gordon and Zarmi in 1989 to emulate the convective cells of the atmospheric air by using finite-time thermodynamics (FTT). In the present article we use the FTT Gordon-Zarmi model to coarsely describe the convection in the Earth’s mantle. Our results permit the existence of two layers of convective cells along the mantle. Besides the model reasonably reproduce the temperatures of the main discontinuities in the mantle, such as the 410 km-discontinuity, the Repetti transition zone and the so-called D-Layer.

ACS Style

Karen Arango-Reyes; Marco Antonio Barranco-Jiménez; Gonzalo Ares De Parga-Álvarez; Fernando Angulo-Brown. A Simple Thermodynamic Model of the Internal Convective Zone of the Earth. Entropy 2018, 20, 985 .

AMA Style

Karen Arango-Reyes, Marco Antonio Barranco-Jiménez, Gonzalo Ares De Parga-Álvarez, Fernando Angulo-Brown. A Simple Thermodynamic Model of the Internal Convective Zone of the Earth. Entropy. 2018; 20 (12):985.

Chicago/Turabian Style

Karen Arango-Reyes; Marco Antonio Barranco-Jiménez; Gonzalo Ares De Parga-Álvarez; Fernando Angulo-Brown. 2018. "A Simple Thermodynamic Model of the Internal Convective Zone of the Earth." Entropy 20, no. 12: 985.

Journal article
Published: 29 August 2018 in The European Physical Journal Plus
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In 1994, De Mey and De Vos (MV) proposed an analysis of an array of two endoreversible heat engines connected by a thermal bridge. Their objective was to show that the well-known Curzon-Ahlborn (CA) efficiency, \(\eta_{CA} = 1-(T_{2}/T_{1})^{1/2}\), is not a universal value for endoreversible engines with a Newtonian heat transfer law. MV found that the efficiency of such an array performing at maximum power is given by \(\eta_{MV}=1-(T_{2}/T_{1})^{1/3}\). However, we show that the CA formula also is present in the MV array when it performs at maximum efficiency. In the present work we made both thermodynamic and thermoeconomic analyses of the MV model and we show an equivalent array formed by three uncoupled endoreversible engines operating simultaneously between the same thermal reservoirs. We extend all the previous analyses to the case of a chemical MV-type array. In all cases three objective functions were used: maximum power, maximum ecological function and maximum efficiency.

ACS Style

A. Ocampo-García; M. A. Barranco-Jiménez; F. Angulo-Brown. Thermodynamic and thermoeconomic optimization of coupled thermal and chemical engines by means of an equivalent array of uncoupled endoreversible engines. The European Physical Journal Plus 2018, 133, 342 .

AMA Style

A. Ocampo-García, M. A. Barranco-Jiménez, F. Angulo-Brown. Thermodynamic and thermoeconomic optimization of coupled thermal and chemical engines by means of an equivalent array of uncoupled endoreversible engines. The European Physical Journal Plus. 2018; 133 (8):342.

Chicago/Turabian Style

A. Ocampo-García; M. A. Barranco-Jiménez; F. Angulo-Brown. 2018. "Thermodynamic and thermoeconomic optimization of coupled thermal and chemical engines by means of an equivalent array of uncoupled endoreversible engines." The European Physical Journal Plus 133, no. 8: 342.

Journal article
Published: 01 December 2017 in Physica A: Statistical Mechanics and its Applications
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ACS Style

A. Ocampo-García; M.A. Barranco-Jiménez; F. Angulo-Brown. Thermodynamic and themoeconomic optimization of isothermal endoreversible chemical engine models. Physica A: Statistical Mechanics and its Applications 2017, 488, 149 -161.

AMA Style

A. Ocampo-García, M.A. Barranco-Jiménez, F. Angulo-Brown. Thermodynamic and themoeconomic optimization of isothermal endoreversible chemical engine models. Physica A: Statistical Mechanics and its Applications. 2017; 488 ():149-161.

Chicago/Turabian Style

A. Ocampo-García; M.A. Barranco-Jiménez; F. Angulo-Brown. 2017. "Thermodynamic and themoeconomic optimization of isothermal endoreversible chemical engine models." Physica A: Statistical Mechanics and its Applications 488, no. : 149-161.

Journal article
Published: 15 March 2017 in Entropy
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The so-called Novikov power plant model has been widely used to represent some actual power plants, such as nuclear electric power generators. In the present work, a thermo-economic study of a Novikov power plant model is presented under three different regimes of performance: maximum power (MP), maximum ecological function (ME) and maximum efficient power (EP). In this study, different heat transfer laws are used: The Newton’s law of cooling, the Stefan–Boltzmann radiation law, the Dulong–Petit’s law and another phenomenological heat transfer law. For the thermoeconomic optimization of power plant models, a benefit function defined as the quotient of an objective function and the total economical costs is commonly employed. Usually, the total costs take into account two contributions: a cost related to the investment and another stemming from the fuel consumption. In this work, a new cost associated to the maintenance of the power plant is also considered. With these new total costs, it is shown that under the maximum ecological function regime the plant improves its economic and energetic performance in comparison with the other two regimes. The methodology used in this paper is within the context of finite-time thermodynamics.

ACS Style

Juan Carlos Pacheco-Paez; Fernando Angulo-Brown; Marco Antonio Barranco-Jiménez. Thermoeconomic Optimization of an Irreversible Novikov Plant Model under Different Regimes of Performance. Entropy 2017, 19, 118 .

AMA Style

Juan Carlos Pacheco-Paez, Fernando Angulo-Brown, Marco Antonio Barranco-Jiménez. Thermoeconomic Optimization of an Irreversible Novikov Plant Model under Different Regimes of Performance. Entropy. 2017; 19 (3):118.

Chicago/Turabian Style

Juan Carlos Pacheco-Paez; Fernando Angulo-Brown; Marco Antonio Barranco-Jiménez. 2017. "Thermoeconomic Optimization of an Irreversible Novikov Plant Model under Different Regimes of Performance." Entropy 19, no. 3: 118.

Journal article
Published: 04 December 2015 in Entropy
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A recent work reported a local stability analysis of a thermo-economical model of an irreversible heat engine working under maximum power conditions. That work showed that after small perturbations to the working temperatures, the system decreases exponentially to the steady state characterized by two different relaxation times. This work extends the local stability analysis considering other performance regimes: the Maximum Efficient Power (MEP) and the Ecological Function (EF) regimes. The relaxation time was shown under different performance regimes as functions of the temperature ratio τ = T2/T1, with T1 > T2, the fractional fuel cost f and a lumped parameter R related to the internal irreversibilities degree. Under Maximum Efficient Power conditions the relaxation times are less than the relaxation times under both Maximum Ecological function and Maximum Power. At Maximum Power Efficient conditions, the model gives better stability conditions than for the other two regimes.

ACS Style

Marco A. Barranco-Jimenez; Norma Sanchez-Salas; Israel Reyes-Ramírez. Local Stability Analysis for a Thermo-Economic Irreversible Heat Engine Model under Different Performance Regimes. Entropy 2015, 17, 8019 -8030.

AMA Style

Marco A. Barranco-Jimenez, Norma Sanchez-Salas, Israel Reyes-Ramírez. Local Stability Analysis for a Thermo-Economic Irreversible Heat Engine Model under Different Performance Regimes. Entropy. 2015; 17 (12):8019-8030.

Chicago/Turabian Style

Marco A. Barranco-Jimenez; Norma Sanchez-Salas; Israel Reyes-Ramírez. 2015. "Local Stability Analysis for a Thermo-Economic Irreversible Heat Engine Model under Different Performance Regimes." Entropy 17, no. 12: 8019-8030.

Conference paper
Published: 14 January 2015 in Journal of Physics: Conference Series
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In this work, we study the thermoeconomics of a non-endoreversible simplified thermal power plant model, the so-called Novikov engine. Our study is made by means of the maximization of objective functions defined by the quotient of the characteristic functions (power output, efficient power and ecological function) and the total costs considered in the performance of the power plant. In our study three different costs are considered: a capital cost that is proportional to the investment and, therefore, to the size of the plant, a fuel cost that is proportional to the fuel consumption and a cost associated to maintenance of the power plant; that is, proportional to the power output of the plant. It is shown that under ecological conditions the plant dramatically reduces the amount of heat rejected to the environment, and a loss of profits is translated in an usage of fuels that dramatically reduces the heat rejected towards the environment in comparison to that obtained by means of maximum power regime.

ACS Style

J C Pacheco-Páez; F Angulo-Brown; M A Barranco-Jiménez. Thermoeconomical analysis of a non-endoreversible Novikov power plant model under different regimes of performance. Journal of Physics: Conference Series 2015, 582, 012050 .

AMA Style

J C Pacheco-Páez, F Angulo-Brown, M A Barranco-Jiménez. Thermoeconomical analysis of a non-endoreversible Novikov power plant model under different regimes of performance. Journal of Physics: Conference Series. 2015; 582 ():012050.

Chicago/Turabian Style

J C Pacheco-Páez; F Angulo-Brown; M A Barranco-Jiménez. 2015. "Thermoeconomical analysis of a non-endoreversible Novikov power plant model under different regimes of performance." Journal of Physics: Conference Series 582, no. : 012050.

Journal article
Published: 04 November 2014 in Entropy
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We present a global stability analysis of a Curzon–Ahlborn heat engine considering different regimes of performance. The stability theory is used to construct the Lyapunov functions to prove the asymptotic stability behavior around the steady state of internal temperatures. We provide a general analytic procedure for the description of the global stability by considering internal irreversibilities and a linear heat transfer law at the thermal couplings. The conditions of the global stability are explored for three regimes of performance: maximum power (MP), efficient power (EP) and the so-called ecological function (EF). Moreover, the analytical results were corroborated by means of numerical integrations, which fully validate the properties of the global asymptotic stability.

ACS Style

Israel Reyes-Ramírez; Marco A. Barranco-Jimenez; Adolfo Rojas-Pacheco; Lev Guzmán-Vargas. Global Stability Analysis of a Curzon–Ahlborn Heat Engine under Different Regimes of Performance. Entropy 2014, 16, 5796 -5809.

AMA Style

Israel Reyes-Ramírez, Marco A. Barranco-Jimenez, Adolfo Rojas-Pacheco, Lev Guzmán-Vargas. Global Stability Analysis of a Curzon–Ahlborn Heat Engine under Different Regimes of Performance. Entropy. 2014; 16 (11):5796-5809.

Chicago/Turabian Style

Israel Reyes-Ramírez; Marco A. Barranco-Jimenez; Adolfo Rojas-Pacheco; Lev Guzmán-Vargas. 2014. "Global Stability Analysis of a Curzon–Ahlborn Heat Engine under Different Regimes of Performance." Entropy 16, no. 11: 5796-5809.

Journal article
Published: 01 April 2014 in Physica A: Statistical Mechanics and its Applications
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ACS Style

Israel Reyes Ramirez; Marco A Barranco-Jiménez; A. Rojas-Pacheco; Lev Guzmán-Vargas. Global stability analysis of a Curzon–Ahlborn heat engine using the Lyapunov method. Physica A: Statistical Mechanics and its Applications 2014, 399, 98 -105.

AMA Style

Israel Reyes Ramirez, Marco A Barranco-Jiménez, A. Rojas-Pacheco, Lev Guzmán-Vargas. Global stability analysis of a Curzon–Ahlborn heat engine using the Lyapunov method. Physica A: Statistical Mechanics and its Applications. 2014; 399 ():98-105.

Chicago/Turabian Style

Israel Reyes Ramirez; Marco A Barranco-Jiménez; A. Rojas-Pacheco; Lev Guzmán-Vargas. 2014. "Global stability analysis of a Curzon–Ahlborn heat engine using the Lyapunov method." Physica A: Statistical Mechanics and its Applications 399, no. : 98-105.

Journal article
Published: 01 November 2013 in Energy Conversion and Management
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ACS Style

Mohammad Hossein Ahmadi; Saeed Dehghani; Amir H. Mohammadi; Michel Feidt; Marco A Barranco-Jiménez. Optimal design of a solar driven heat engine based on thermal and thermo-economic criteria. Energy Conversion and Management 2013, 75, 635 -642.

AMA Style

Mohammad Hossein Ahmadi, Saeed Dehghani, Amir H. Mohammadi, Michel Feidt, Marco A Barranco-Jiménez. Optimal design of a solar driven heat engine based on thermal and thermo-economic criteria. Energy Conversion and Management. 2013; 75 ():635-642.

Chicago/Turabian Style

Mohammad Hossein Ahmadi; Saeed Dehghani; Amir H. Mohammadi; Michel Feidt; Marco A Barranco-Jiménez. 2013. "Optimal design of a solar driven heat engine based on thermal and thermo-economic criteria." Energy Conversion and Management 75, no. : 635-642.

Journal article
Published: 01 November 2013 in Energy Conversion and Management
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ACS Style

Mohammad Hossein Ahmadi; Amir H. Mohammadi; Saeed Dehghani; Marco A Barranco-Jiménez. Multi-objective thermodynamic-based optimization of output power of Solar Dish-Stirling engine by implementing an evolutionary algorithm. Energy Conversion and Management 2013, 75, 438 -445.

AMA Style

Mohammad Hossein Ahmadi, Amir H. Mohammadi, Saeed Dehghani, Marco A Barranco-Jiménez. Multi-objective thermodynamic-based optimization of output power of Solar Dish-Stirling engine by implementing an evolutionary algorithm. Energy Conversion and Management. 2013; 75 ():438-445.

Chicago/Turabian Style

Mohammad Hossein Ahmadi; Amir H. Mohammadi; Saeed Dehghani; Marco A Barranco-Jiménez. 2013. "Multi-objective thermodynamic-based optimization of output power of Solar Dish-Stirling engine by implementing an evolutionary algorithm." Energy Conversion and Management 75, no. : 438-445.

Journal article
Published: 01 September 2013 in Energy Conversion and Management
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ACS Style

Mohammad Hossein Ahmadi; Hoseyn Sayyaadi; Amir H. Mohammadi; Marco A Barranco-Jiménez. Thermo-economic multi-objective optimization of solar dish-Stirling engine by implementing evolutionary algorithm. Energy Conversion and Management 2013, 73, 370 -380.

AMA Style

Mohammad Hossein Ahmadi, Hoseyn Sayyaadi, Amir H. Mohammadi, Marco A Barranco-Jiménez. Thermo-economic multi-objective optimization of solar dish-Stirling engine by implementing evolutionary algorithm. Energy Conversion and Management. 2013; 73 ():370-380.

Chicago/Turabian Style

Mohammad Hossein Ahmadi; Hoseyn Sayyaadi; Amir H. Mohammadi; Marco A Barranco-Jiménez. 2013. "Thermo-economic multi-objective optimization of solar dish-Stirling engine by implementing evolutionary algorithm." Energy Conversion and Management 73, no. : 370-380.

Journal article
Published: 17 December 2012 in Entropy
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This work shows the power of the variational approach for studying the efficiency of thermal engines in the context of the Finite Time Thermodynamics (FTT). Using an endoreversible Curzon–Ahlborn (CA) heat engine as a model for actual thermal engines, three different criteria for thermal efficiency were analyzed: maximum power output, ecological function, and maximum power density. By means of this procedure, the performance of the CA heat engine with a nonlinear heat transfer law (the Stefan–Boltzmann law) was studied to describe the heat exchanges between the working substance and its thermal reservoirs. The specific case of the Müser engine for all the criteria was analyzed. The results confirmed some previous findings using other procedures and additionally new results for the Müser engine performance were obtained.

ACS Style

Juan C. Chimal-Eguía; Norma Sánchez-Salas; Marco A. Barranco-Jiménez. A Finite-Time Thermal Cycle Variational Optimization with a Stefan–Boltzmann Law for Three Different Criteria. Entropy 2012, 14, 2611 -2625.

AMA Style

Juan C. Chimal-Eguía, Norma Sánchez-Salas, Marco A. Barranco-Jiménez. A Finite-Time Thermal Cycle Variational Optimization with a Stefan–Boltzmann Law for Three Different Criteria. Entropy. 2012; 14 (12):2611-2625.

Chicago/Turabian Style

Juan C. Chimal-Eguía; Norma Sánchez-Salas; Marco A. Barranco-Jiménez. 2012. "A Finite-Time Thermal Cycle Variational Optimization with a Stefan–Boltzmann Law for Three Different Criteria." Entropy 14, no. 12: 2611-2625.

Research article
Published: 24 July 2012 in Advances in Astronomy
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Classical models of the Sun suggest that the energy output in the early stage of its evolution was 30 percent less than today. In this context, radiative balance alone between The Sun and the Earth was not sufficient to explain the early presence of liquid water on Earths surface. This difficulty is called the faint young Sun paradox. Many proposals have been published to solve this paradox. In the present work, we propose an oversimplified finite-time thermodynamic approach that describes the air convective cells in the Earth atmosphere. This model introduces two atmospheric modes of thermodynamic performance: a first mode consisting in the maximization of the power output of the convective cells (maximum power regime) and a second mode that consists in maximizing a functional representing a good trade-off between power output and entropy production (the ecological regime). Within the assumptions of this oversimplified model, we present different scenarios of albedo and greenhouse effects that seem realistic to preserve liquid water on the Earth in the early stage of formation.

ACS Style

F Angulo-Brown; Marco A. Rosales; Marco A Barranco-Jiménez. The Faint Young Sun Paradox: A Simplified Thermodynamic Approach. Advances in Astronomy 2012, 2012, 1 -10.

AMA Style

F Angulo-Brown, Marco A. Rosales, Marco A Barranco-Jiménez. The Faint Young Sun Paradox: A Simplified Thermodynamic Approach. Advances in Astronomy. 2012; 2012 (4043):1-10.

Chicago/Turabian Style

F Angulo-Brown; Marco A. Rosales; Marco A Barranco-Jiménez. 2012. "The Faint Young Sun Paradox: A Simplified Thermodynamic Approach." Advances in Astronomy 2012, no. 4043: 1-10.

Journal article
Published: 26 March 2012 in ISRN Astronomy and Astrophysics
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Within the context of finite-time thermodynamics (FTTs) some models of convective atmospheric cells have been proposed to calculate the efficiency of the conversion of solar energy into wind energy and also for calculating the surface temperature of the planets of the solar system. One of these models is the Gordon and Zarmi (GZ) model, which consists in taking the sun-earth-wind system as a FTT-cyclic heat engine where the heat input is solar radiation, the working fluid is the earth's atmosphere and the energy in the winds is the work produced. The cold reservoir to which the engine rejects heat is the 3 K surrounding universe. In the present work we apply the GZ-model to investigate some features of the convective zone of the sun by means of a possible structure of successive convective cells along the well-established convective region of the sun. That is, from 0.714 RS up to RS being RS the radius of the sun. Besides, we estimate the number of cells of the model, the possible size of the cells, their thermal efficiency, and also their average power output. Our calculations were made by means of two FTT regimes of performance: the maximum power regime and the maximum ecological function regime. Our results are in reasonable agreement with others reported in the literature.

ACS Style

J. Ortuño-Araujo; M. A. Barranco-Jiménez; Janos Zsargo; F. Angulo-Brown. An Endoreversible Thermodynamic Model Applied to the Convective Zone of the Sun. ISRN Astronomy and Astrophysics 2012, 2012, 1 -7.

AMA Style

J. Ortuño-Araujo, M. A. Barranco-Jiménez, Janos Zsargo, F. Angulo-Brown. An Endoreversible Thermodynamic Model Applied to the Convective Zone of the Sun. ISRN Astronomy and Astrophysics. 2012; 2012 ():1-7.

Chicago/Turabian Style

J. Ortuño-Araujo; M. A. Barranco-Jiménez; Janos Zsargo; F. Angulo-Brown. 2012. "An Endoreversible Thermodynamic Model Applied to the Convective Zone of the Sun." ISRN Astronomy and Astrophysics 2012, no. : 1-7.