Relevant bibliographies by topics / Standard Thermodynamic Functions

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Standard Thermodynamic Functions'

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Published: 4 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Standard Thermodynamic Functions"

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Ibrahimova, F. S. "CALCULATION OF STANDARD THERMODYNAMIC FUNCTIONS OF ARGYRODIT Ag8GeSe6." Chemical Problems 17, no. 3 (2019): 358–65. http://dx.doi.org/10.32737/2221-8688-2019-3-358-365.

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Druzhinina, A. I., R. M. Varushchenko, S. I. Troyanov, and L. N. Sidorov. "The standard thermodynamic functions of fullerene chloride, C60Cl30." Journal of Chemical Thermodynamics 42, no. 2 (February 2010): 165–68. http://dx.doi.org/10.1016/j.jct.2009.07.007.

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Voronin, Gennady F., and Ilya B. Kutsenok. "Universal Method for Approximating the Standard Thermodynamic Functions of Solids." Journal of Chemical & Engineering Data 58, no. 7 (June 17, 2013): 2083–94. http://dx.doi.org/10.1021/je400316m.

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Imamaliyeva, Samira. "Thermodynamic properties of the GdTe3 compound." Physics and Chemistry of Solid State 22, no. 3 (July 17, 2021): 420–25. http://dx.doi.org/10.15330/pcss.22.3.420-425.

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The alloys of the Gd-Te system in the range of compositions > 75 at% Te were studied by the methods of X-ray diffraction (XRD) and electromotive forces (EMF). From the EMF measurements of the concentration cells relative to the GdTe electrode in the 300-450 K temperature range, the partial thermodynamic functions of GdTe in alloys were determined. By combining these data with the corresponding functions of Gd in GdTe, the partial molar functions of gadolinium in GdTe3+Te alloys, and standard thermodynamic functions of formation and standard entropy of the GdTe3 compound were calculated. The obtained results were compared with the literature data.
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Zivny, O. "STANDARD THERMODYNAMIC FUNCTIONS OF DIATOMIC PRODUCTS OF THERMAL DECOMPOSITION OF SF6." High Temperature Material Processes (An International Quarterly of High-Technology Plasma Processes) 4, no. 3 (2000): 20. http://dx.doi.org/10.1615/hightempmatproc.v4.i3.70.

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Loewenschuss, Aharon, and Yitzhak Marcus. "Standard Thermodynamic Functions of Gaseous Polyatomic Ions at 100–1000 K." Journal of Physical and Chemical Reference Data 16, no. 1 (January 1987): 61–89. http://dx.doi.org/10.1063/1.555792.

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Loewenschuss, A., and Y. Marcus. "Standard Thermodynamic Functions of Some Isolated Ions at 100–1000 K." Journal of Physical and Chemical Reference Data 25, no. 6 (November 1996): 1495–507. http://dx.doi.org/10.1063/1.555990.

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Kosmulski, Marek, Joanna Matysiak, and Jerzy Szczypa. "Solvent Effects on Standard Thermodynamic Functions of Surface Dissociation of Oxides." Journal of Colloid and Interface Science 164, no. 2 (May 1994): 280–84. http://dx.doi.org/10.1006/jcis.1994.1168.

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Babanly, Dunya Mahammad, Qorkhmaz Mansur Huseynov, Ziya Saxaveddin Aliev, Dilgam Babir Tagiyev, and Mahammad Baba Babanly. "Thermodynamic Study of Tl6SBr4 Compound and Some Regularities in Thermodynamic Properties of Thallium Chalcohalides." Advances in Materials Science and Engineering 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/5370289.

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The solid-phase diagram of the Tl-TlBr-S system was clarified and the fundamental thermodynamic properties of Tl6SBr4 compound were studied on the basis of electromotive force (EMF) measurements of concentration cells relative to a thallium electrode. The EMF results were used to calculate the relative partial thermodynamic functions of thallium in alloys and the standard integral thermodynamic functions (-ΔfG0, -ΔfH0, and S0298) of Tl6SBr4 compound. All data regarding thermodynamic properties of thallium chalcogen-halides are generalized and comparatively analyzed. Consequently, certain regularities between thermodynamic functions of thallium chalcogen-halides and their binary constituents as well as degree of ionization (DI) of chemical bonding were revealed.
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Clarke, Colin W., and David N. Glew. "Aqueous nonelectrolyte solutions. Part XVI. Formula of deuterium sulfide D-hydrate and its dissociation thermodynamic functions." Canadian Journal of Chemistry 78, no. 1 (January 15, 2000): 1–9. http://dx.doi.org/10.1139/v99-219.

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A method has been devised to approximate both the hydrate formula number n and the standard thermodynamic functions for hydrate dissociation from the temperature change of the hydrate former fugacity along a univariant three-phase (hl1g) equilibrium line. Thermodynamic equations are derived, their validity discussed, and an iterative method for their solution is described. The univariant (hl1g) equilibrium dissociation of deuterium sulfide D-hydrate (D2S·nD2O phase h) into gaseous deuterium sulfide (g) and liquid deuterium oxide (l1) has been treated to give approximate formulae and dissociation constants at 58 temperatures from 2.798 to 30.666°C. Dissociation equilibrium constants Kp(h–> l1g) have been represented as a function of temperature by a four-parameter equation which yields both values and standard errors (i) for ΔHot(h–> l1g) and ΔCpot(h–> l1g) the standard enthalpy and heat capacity changes for D-hydrate dissociation and (ii) for n = r the approximate formula number of the D-hydrate at each experimental temperature. The formula D2S·6.115D2O with standard error 0.018D2O is found for deuterium sulfide D-hydrate at lower quadruple point Q(hs1l1g) 3.392°C; an approximate formula D2S·5.840D2O with SE 0.019D2O is found at upper quadruple point Q(hs1l2g) 30.770°C. Key words: clathrate D-hydrate of deuterium sulfide, deuterium sulfide D-hyfrate, formula of deuterium sulfide D-hydrate, thermodynamics of clathrate hydrate dissociation, dissociation equilibrium constant of deuterium sulfide D-hydrate, standard enthalpy, and heat capacity changes for dissociation of deuterium sulfide D-hydrate.
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Dissertations / Theses on the topic "Standard Thermodynamic Functions"

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Živný, Oldřich. "Výpočet standartních termodynamických funkcí jednoduchých sloučenin v podmínkách termálního plazmatu." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2011. http://www.nusl.cz/ntk/nusl-233342.

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The substance of present work is to provide standard thermodynamic functions (STF) of small size molecules for the calculation of the composition and thermodynamic properties of low-temperature plasma, and also method for such a calculation applying obtained STF under non-ideal plasma conditions. With a view to further application in modelling the phenomena in thermal plasma the range of pressures is limited to the region from 0.01 bar to 100 bar, and that of temperature to 298.15–50 kK. To obtain STF the method of partition function resulting from statistical mechanics was proposed. State of art in the given scientific area and theoretical basis of the statistical mechanics required for establishing of the proposed method together with discussion of partition function divergence problem have been reviewed. For the calculation of STF of diatomic molecules the method of direct summation has been employed, whereas, as for the larger size molecules, the rigid rotor and harmonic oscillator model have been generally adopted. The spectral data required for the calculations have been taken from literature, or, in selected cases, these have been computed by quantum chemistry ab initio techniques. The resulting STF have been included into already existing database system of thermodynamic properties and those can serve as input data for subsequent thermodynamic calculations. A general method has been worked out for the purpose of the computation of thermodynamic properties and composition of non-ideal homogenous plasma system in thermodynamic equilibrium. The method is based on minimizing total Gibbs energy to compute at constant pressure or Helmholtz energy to compute at constant volume. The computation algorithm was implemented into computer program and subsequently applied to the computation of the composition and thermodynamic properties of SF6 dissociation and ionization products using obtained STF.
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Book chapters on the topic "Standard Thermodynamic Functions"

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Tsallis, Constantino. "Nonextensive Statistical Mechanics: Construction and Physical Interpretation." In Nonextensive Entropy. Oxford University Press, 2004. http://dx.doi.org/10.1093/oso/9780195159769.003.0006.

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Statistical mechanics is clearly mechanics (classical, quantum, special or general relativistic, or any other) plus the theory of probabilities, as is well known. It is our understanding, however, that it is more than that. It is also the adoption of a specific entropic functional, which will, in some sense, adequately shortcut the vast, and for most practical purposes useless, detailed microscopic mechanical information on the system. It is, in particular, through this functional that the connection with thermodynamics and its macroscopic laws will be established. This particular functional is determined by the specific type (or geometry) of occupation of the phase space (or Hilbert space or analogous space). This geometrical structure depends in turn not only on the microscopic dynamics that the system obeys, but also on the initial conditions at which the system is placed at t = 0. In colloquial terms, we could say that the microscopic dynamics determine where the system is allowed to live, whereas the initial conditions determin where it likes to live within the allowed region. This viewpoint is consistent with Einstein's perspective on classical statistical mechanics, and especially with his criticism [82, 92] of the celebrated Boltzmann principle However, the problem is that, up to now, no systematic manner exists for univocally determining the entropic functional to be used, given the dynamics and the initial conditions. The optimization of this entropy under the physically appropriate constraints is expected to provide the correct probability distribution for the microscopic states of the macroscopic stationary state of the system. Boltzmann, then complemented by Gibbs, proposed the celebrated form which is the foundation of standard statistical mechanics.
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Martinho Simões, José A., and Manuel Minas da Piedade. "Titration Calorimetry." In Molecular Energetics. Oxford University Press, 2008. http://dx.doi.org/10.1093/oso/9780195133196.003.0015.

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Titration calorimetry is a method in which one reactant inside a calorimetric vessel is titrated with another delivered from a burette at a controlled rate. This technique has been adapted to a variety of calorimeters, notably of the isoperibol and heat flow types. The output of a titration calorimetric experiment is usually a plot of the temperature change or the heat flow associated with the reaction or physical interaction under study as a function of time or the amount of titrant added. A primary use of titration calorimetry is the determination of enthalpies of reaction in solution. The obtained results may of course lead to enthalpies of formation of compounds in the standard state by using appropriate thermodynamic cycles and auxiliary data, as described in chapter 8 for reaction-solution calorimetry. Moreover, when reactions are not quantitative, both the equilibrium constant and the enthalpy of reaction can often be determined from a single titration run. This also yields the corresponding ΔrGo and ΔrSo through equations 2.54 and 2.55. Extensive use has been made of titration calorimetry as an analytical tool. These applications, which are outside the scope of this book, have been covered in various reviews. The historical development of titration calorimetry has been addressed by Grime. The technique is credited to have been born in 1913, when Bell and Cowell used an apparatus consisting of a 200 cm3 Dewar vessel, a platinum stirrer, a thermometer graduated to tenths of degrees, and a volumetric burette to determine the end point of the titration of citric acid with ammonia from a plot of the observed temperature change against the volume of ammonia added. The capabilities of titration calorimetry have enormously evolved since then, and the accuracy limits of modern titration calorimeters are comparable to those obtained in conventional isoperibol or heat-flow instruments. The titration procedures described in the literature can be classified as continuous or incremental, depending on the mode of titrant addition. In the first case the titrant is continuously introduced in the reaction vessel at a programmed (not necessarily constant) rate during a run.
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Conference papers on the topic "Standard Thermodynamic Functions"

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Roth, Bryce A., Erin M. McClure, and Travis W. Danner. "Implementation of Engine Loss Analysis Methods in the Numerical Propulsion System Simulation." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-68202.

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This paper describes the implementation and application of a new set of thermodynamic loss analysis tools in the Numerical Propulsion System Simulation. This analysis tool set is intended to enable fast, accurate estimation of losses in an engine cycle model with minimal effort on the part of the user. The basic thermodynamic concepts and analysis methods are first described. Next, the implementation of the necessary thermodynamic calculation functions is described. These functions are intended to be used in conjunction with a general-purpose loss analysis element to facilitate estimation of all losses in an engine cycle model. The loss analysis element is described in detail and is subsequently used to analyze a mixed flow turbofan engine. Typical performance and loss results are presented. The resultant detailed loss information is not normally available when using standard cycle analysis methods. The information gained from this analysis is useful in that it yields insight into the underlying losses that contribute to the overall engine performance.
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Kunick, Matthias, Hans-Joachim Kretzschmar, Francesca di Mare, and Uwe Gampe. "CFD Analysis of Steam Turbines With the IAPWS Standard on the Spline-Based Table Look-Up Method (SBTL) for the Fast Calculation of Real Fluid Properties." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-43984.

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Accurate simulations of non-stationary processes in steam turbines by means of Computational Fluid Dynamics (CFD) require precise and extremely fast algorithms for computing real fluid properties. To fulfill these requirements, the International Association for the Properties of Water and Steam (IAPWS) issues the “Guideline on the Fast Calculation of Steam and Water Properties with the Spline-Based Table Look-Up Method (SBTL)” as an international standard. Through the use of this method, spline functions for the independent variables specific volume and specific internal energy (v,u) are generated for water and steam based on the industrial formulation IAPWS-IF97. With these spline functions, thermodynamic and transport properties can be computed. The desired backward functions of the variables pressure and specific volume (p,v), and specific internal energy and specific entropy (u,s) are numerically consistent with the spline functions from (v,u). The properties calculated from these SBTL functions are in agreement with those of IAPWS-IF97 within a maximum relative deviation of 10 to 100 ppm depending on the property and the range of thermodynamic states spanned under the given conditions (range of state). Consequently, the differences between the results of process simulations using the SBTL method and those obtained through the use of IAPWS-IF97 are negligible. Moreover, the computations from the (v,u) spline functions are more than 200 times faster than the iterative calculations with IAPWS-IF97. In order to demonstrate the efficiency and applicability of the SBTL method, the SBTL functions have been implemented into the CFD software TRACE, developed by the German Aerospace Center (DLR). As a result, the computing times required for the simulations of steam flow in a turbine cascade considering real fluid behavior are reduced by a factor of 6–10 in comparison to the calculations based on IAPWS-IF97. Furthermore, computing times are increased by a factor of 1.4 only with respect to CFD calculations where steam is considered to be an ideal gas, through the use of the SBTL method.
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Zaki, Wael, and N. V. Viet. "A Phenomenological Model for Shape Memory Alloys With Uniformly Distributed Porosity." In ASME 2020 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/smasis2020-2396.

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Abstract A phenomenological model is proposed for shape memory alloys considering the presence of uniformly distributed voids. The model is developed within a modified generalized standard materials framework, which considers the presence of constraints on the state variables and ensures thermodynamic consistency. Within this framework, a free energy density is first proposed for the porous material, wherein the influence of porosity is accounted for by means of scalar state variables accounting for damage and inelastic dilatation. By choosing key thermodynamic forces, derived from the expression of the energy, as sub-gradients of a pseud-potential of dissipation, loading functions are derived that govern phase transformation and martensite detwinning. Flow rules are also proposed for damage and inelastic dilatation in a way that ensures positive dissipation. The model is discretized and the integration of the time-discrete formulation is carried out using an implicit formulation, whereby a return mapping algorithm is implemented to calculate increments of dissipative variables including inelastic strains. Comparison with data from the literature is finally presented.
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Avdeev, Sergey, and Andrey Tkachenko. "Approximation Method of the Gas Turbine Engine Compressor Characteristics." In ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-59951.

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Abstract A technique of representing and approximating of gas turbine engine (GTE) compressor maps is given. The aims of this study are to improve the efficiency of processing GTE test results and the reliability of GTE mathematical model. The paper analyzes various approaches of approximating, presenting, and generalizing the characteristics of compressors. The advantages and limitations of the existing compressor maps approximation methods are summarized in the paper. A comparison of the obtained approximating method is carried out against previously developed methods. Based on the performed analysis, a method is proposed for approximating of compressor maps, considering the requirements of identification of the GTE model. The resulting approximation method is based on the use of equations in a polar coordinate system. The study also analyzed the possibility of using the developed method in the system of thermodynamic calculations and analysis “ASTRA” (the program was developed at Samara University). The developed approximation technique was tested on the experimental characteristics of the low- and high-pressure axial compressor. The estimation of the quality of the approximation was carried out using the standard deviation. It has been demonstrated that the obtained approximating functions describe the experimental data quite well. The obtained values of the standard deviation in the polar coordinate system were less than 10%.
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Woodbury, Keith A., Robert P. Taylor, Jesse Huguet, Troy Dent, Joseph Chappell, and Kenneth Mahan. "Vertical Integration of Excel in the Thermal Mechanical Engineering Curriculum." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-69165.

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Microsoft Excel is a ubiquitous tool used frequently by practicing engineers. A recent survey of alumni from The University of Alabama’s Department of Mechanical Engineering regarding software tools revealed that 100% of the respondents used Microsoft Excel regularly on their jobs, while a low percentage used standard packages such as ANSYS or MATLAB, and that none used software tools which had been bundled with textbooks. The spreadsheet environment offers a great platform for computation and organization of engineering work, and the Visual Basic engine allows for great extensibility of Excel through the development of special functions and add-in modules. This paper reports on a proof-of-concept project to implement sustained emphasis on Microsoft Excel in the thermal mechanical curriculum at The University of Alabama. Specific add-in modules for use in thermodynamic analysis and heat transfer analysis have been developed and are continually being refined. These add-in modules have been utilized in a sequence of courses Thermo I, Heat Transfer, Thermo II, and Energy Systems Design. Features of the add-in modules are detailed in this report and feedback from students and teachers are given.
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Wettstein, Hans E. "The Potential of GT Combined Cycles for Ultra High Efficiency." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-68586.

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Gas turbine combined cycles (GTCC) using a steam bottoming cycle are a widely used technology for electric power generation. From [1] it is known that the best current large GTCC’s loose around 25% of the fuel exergy just by combusting the fuel while all other exergy losses sum up to around 15%. For the net efficiency of such plants 60% is remaining. This paper shows thermodynamic calculation results of GTCC’s with variable pressure ratio and turbine inlet temperature (TIT) aimed at understanding the efficiency potential associated with further increases of the TIT thus reducing the exergy loss by combustion. The assumptions of these calculations correspond to published industrial experience and standard assumptions in two different scenarios. The results are curves showing net efficiency and specific power as functions of TIT. Other data like the related pressure ratio and compressor exit temperature are shown too. The conclusion shows that a net efficiency of 63…65% is feasible with a hot gas temperature of around 1750°C based on the two scenarios. The winning cycle arrangement uses an adiabatic compressor. A GTCC with GT-compressor having one intercooling stage is clearly less favorable in several respects.
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Sielemann, Michael, Matthis Thorade, Jim Claesson, Anh Nguyen, Xin Zhao, Smruti Sahoo, and Konstantinos Kyprianidis. "Modelica and Functional Mock-Up Interface: Open Standards for Gas Turbine Simulation." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91597.

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Abstract This paper introduces two physical modeling standards in the gas turbine and cycle analysis context. Modelica is the defacto standard for physical system modeling and simulation. The Functional Mock-Up Interface is a domain-independent standard for model exchange (“engine decks”). The paper summarizes key language concepts and discusses important design patterns in the application of gas turbine simulation concepts to the acausal modeling language. To substantiate how open standards are applicable to gas turbine simulation, the paper closes with two application examples, a conventional unmixed turbofan thermodynamic cycle and weight analysis as well as an electrically boosted geared turbofan.
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Haq, M. Z., and M. R. Mohiuddin. "Thermodynamic Analysis of a Multi-Fueled Single Cylinder SI Engine." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62423.

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The paper presents a thermodynamic analysis of a single cylinder four-stroke spark-ignition (SI) engine fuelled by four fuels namely iso-octane, methane, methanol and hydrogen. In SI engines, due to phenomena like ignition delay and finite flame speed manifested by the fuels, the heat addition process is not instantaneous, and hence ‘Weibe function’ is used to address the realistic heat release scenario of the engine. Empirical correlations are used to predict the heat loss from the engine cylinder. Physical states and chemical properties of gaseous species present inside the cylinder are determined using first and second law of thermodynamics, chemical kinetics, JANAF thermodynamic data-base and NASA polynomials. The model is implemented in FORTRAN 95 using standard numerical routines and some simulation results are validated against data available in literature. The second law of thermodynamics is applied to estimate the change of exergy i.e. the work potential or quality of the in-cylinder mixture undergoing various phases to complete the cycle. Results indicate that, around 4 to 24% of exergy initially possessed by the in-cylinder mixture is reduced during combustion and about 26 to 42% is left unused and exhausted to the atmosphere.
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Gerlach, David, and Xiaohong Liao. "Finite Time Thermodynamics Model of an Absorption Chiller." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38777.

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A finite time thermodynamic model of an absorption chiller was developed. The effects of irreversibilities due to finite rate heat transfer in the heat exchangers are modeled by using the standard UA formulation with the absorber and condenser lumped as one heat exchanger. In order to match experimental data within 20%, the UA of the generator was modeled as a linear function of the heating fluid flow rate. A constant entropy production due to internal processes was included to model reduction in performance at off design conditions. The UA parameters and internal entropy production constant form a set of five fitting parameters with physical meaning. This is fewer parameters than the non-physical curve fit used in the industry standard Energy Plus model. The model was validated within 20% against data sets from two different systems.
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Mo¨ller, Bjo¨rn Fredriksson, Mitsuru Obana, Mohsen Assadi, and Athanasios Mitakakis. "Optimisation of HAT-Cycles – With and Without CO2 Capture." In ASME Turbo Expo 2004: Power for Land, Sea, and Air. ASMEDC, 2004. http://dx.doi.org/10.1115/gt2004-53734.

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In a world where distributed power generation and deregulation of energy markets are on everyone’s agenda, the need for highly efficient power plants with short lead times is greater than ever. Although at present combined cycles provide a solution, development of ever more advanced machines to increase efficiency and lower the environmental impact has led to high maintenance costs and a decrease in availability. The Humid Air Turbine (HAT) represents a different approach, suitable for distributed power generation in the medium power range. The HAT cycle, and other wet gas turbine cycles, which have been extensively studied during the last ten years, show as high an efficiency as that of combined cycles, but at a lower specific cost and, with inherently low emissions of NOx. Despite all research done no full-scale plant has been built as yet. CO2 capture is another concept widely studied in recent years. In the present study three HAT cycle configurations are investigated, two of them connected to a post-combustion CO2-capture plant. Thermodynamic and thermoeconomic optimisation of the plants was performed using genetic algorithms (GA), a robust optimisation technique based on Darwinian evolution theories. The three configurations studied were 1) a standard inter-cooled HAT cycle, referred to as the reference cycle, 2) the reference cycle together with an integrated CO2-capture plant taking the energy needed for the CO2 separation from the exhaust heat of the turbine, and 3) the reference cycle together with a CO2 capture plant, in which the energy is supplied by a separate bio-fuelled boiler. This third configuration enables all fossil-based CO2 to be separated. All power cycles were modelled using IPSEpro, a heat- and mass-balance software, employing advanced component models developed by the authors. It has an interface for optimisation and the possibility of employing user-defined objective functions. The impact of CO2 taxation was studied to determine showing which configuration is the most economical at the current fuel-price and tax-level.
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