Gotowe bibliografie tematyczne / Specific enthalpy of the working bogy

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Gotowa bibliografia na temat „Specific enthalpy of the working bogy”

Autor: Grafiati

Data publikacji: 2 czerwca 2025

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "Specific enthalpy of the working bogy"

Berliand, M., and R. Ishchenko. "CALCULATION OF THE EXPANSION PROCESS OF THE FLOW OF WORKING BODY IN THE NOZZLE OF A LIQUID-PHASE NUCLEAR ROCKET ENGINE." Slovak international scientific journal, no. 95 (May 15, 2025): 86–92. https://doi.org/10.5281/zenodo.15427667.

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In this work, flow parameters of the working body (hydrogen) were calculated at the inlet, throat, and exit sections of the liquid-phase nuclear rocket engine nozzle. A method was proposed for determining the specific impulse of thrust while accounting for losses due to scattering, friction, and variations in the specific enthalpy of the working body caused by non-adiabatic effects. The calculated specific impulse exceeded 9500 m/s, significantly surpassing the performance of chemical rocket engines. The evaluation of the thermogasdynamic parameters of the working body expansion confirmed the

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Gogo, V., S. Podkopaiev, and N. Chernykh. "JUSTIFICATION OF COMPLEX LABOR PROTECTION MEASURES FOR MINERS BY MINE AIR QUALITY FACTORS." Naukovyi visnyk Donetskoho natsionalnoho tekhnichnoho universytetu, no. 1 (2023): 40–52. http://dx.doi.org/10.31474/2415-7902-2023-1-40-52.

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The results of an analytical-experimental study related to the actual task of substantiating comprehensive measures for occupational safety of miners in deep coal mines on the factors of mine air quality based on the study of hydrodynamic air conditioning processes, which is especially important for the development of autonomous and energy-saving means of ensuring miners' occupational safety standards, are presented. Purpose. The goal is to substantiate and analytically study the main thermodynamic characteristics of the process of hydraulic mine air conditioning for the development of functio

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Vorobieva, Hanna S. "Modification of the Redlich-Kwong-Aungier Equation of State to Determine the Main Thermodynamic Parameters in the Pure Liquid CO2 Region." Journal of Mechanical Engineering 25, no. 1 (2022): 6–13. http://dx.doi.org/10.15407/pmach2022.02.006.

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The most important parameters for determining the state of real gas and the thermodynamic properties of the working fluid in a pure liquid region are pressure, specific volume, enthalpy and entropy. The paper presents a modified Redlich-Kwong-Aungier equation of state for determining pressure, specific volume, enthalpy and entropy in the pure liquid phase of real gas. CO2 was selected as the studied working fluid. When solving this problem, the author identified the main parameters of liquid carbon dioxide thermo-dynamics with the least error in comparison with experimental data in a wide rang

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Wei, Li Li, Yu Feng Zhang, Yong Chao Mu, Xiao Chen Yang, and Hong Ting Ma. "Influencing Factors of Low-Grade Energy Conversion System Using ORCs." Applied Mechanics and Materials 193-194 (August 2012): 206–10. http://dx.doi.org/10.4028/www.scientific.net/amm.193-194.206.

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Rankine cycles using organic working fluids are widely believed feasible in recovering low enthalpy-containing heat. Through the analysis, the enthalpy difference, the dryness of inlet wet steam and evaporating and condensing temperature have significant influence on the energy conversion efficiency. The power output also relies on the specific volume and latent heat, which determine the mass flow rate. The results serve good guideline for experiments and systematic optimization.

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Kazakova, A. I., I. G. Yakovlev, and I. K. Garkushin. "Study of phase equilibria in a two-component system diphenyloxide <i>- n -</i> nonadecane." Расплавы, no. 1 (June 14, 2024): 17–25. http://dx.doi.org/10.31857/s0235010624010027.

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Using the Schroeder, UNIFAC and UNIFAC Dortmund methods, the fusibility diagram of the diphenyloxide – n –nonadecane system was calculated and it was shown that it belongs to the eutectic type. Individual substances and their mixtures were studied experimentally using a differential scanning microcalorimeter. On the DTA heating curve of the eutectic alloy, two endo-effects are noted, corresponding to the polymorphic transition of n–nonadecane and the melting of the eutectic. A comparison of the eutectic coordinates calculated by these methods with experimental data is presented. For a eutectic

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قدّاح, عاصم. "Studying of the changes effect of the gas properties on the turbine performance using Gordon-McBride algorithm." FES Journal of Engineering Sciences 7, no. 1 (2014): 19. http://dx.doi.org/10.52981/fjes.v7i1.99.

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The turbine performance parameters are calculated assuming that the working fluid is a calorically perfect gas with constant specific heats, whereas it is actually a perfect gas. We will study the of the working fluid properties on the turbine performance according to Gordon-McBride algorithm which determines changes of the specific heat and the enthalpy as a function of the temperature and the fuel to air, and suggest an alternatives if the studying was carried out as calorically perfect gas.

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Yang, De Ming, and Bo Han Tian. "Characterization of the Expanded Plasma Jet Generated at Reduced Chamber Pressure." Applied Mechanics and Materials 644-650 (September 2014): 4892–95. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.4892.

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Very low pressure plasma spraying has been attracted attention due to special properties of the expanded plasma jet which may probably deposit specific and unique structure coatings, such as columnar structure coatings. The forming of the coatings is affected by plasma generating and working conditions. These operating parameters such as arc power, plasma gas flow rate, and chamber pressure have influences on pressure, enthalpy and temperature of plasma jet. In this work, an enthalpy probe is applied to measure the enthalpy of argon-hydrogen plasma jet generated at chamber pressure of 3000 Pa

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Shevchenko, Mykhailo, Maya Ambrozhevich, and Kseniia Fesenko. "Working process model development of the gas turbine engine combustor fueling on methanol." Eastern-European Journal of Enterprise Technologies 2, no. 1 (128) (2024): 49–54. http://dx.doi.org/10.15587/1729-4061.2024.301325.

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The use of methanol as a fuel for aircraft and stationary gas turbine engines (GTE) is a priority direction in engine building. It is well known that when modeling the GTE performances using first-level mathematical models, there is an error in calculating specific fuel consumption, which is caused by the simplified description of the GTE combustor working process. The object of the study is the working process in the GTE combustor fueling on methanol. The peculiarity of the developed mathematical model of the working process of the GTE combustor is the use of enthalpy dependencies on temperat

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Trawiński, Paweł. "Development and implementation of mathematical models of working mediums for gas part of combined cycle gas turbine system in Python programming environment." E3S Web of Conferences 137 (2019): 01047. http://dx.doi.org/10.1051/e3sconf/201913701047.

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The working mediums in the gas turbine systems are: atmospheric air, natural gas and exhaust gases. For the detailed analysis of thermodynamic performance and values at characteristic points of the cycle it is necessary to know the relations defining: specific volume, specific isobaric and isochoric heat capacity, isentropic exponent, specific enthalpy and specific entropy. Mathematical models of thermodynamic parameters for the mentioned mediums were developed based on dependencies for mixtures of ideal and semi-ideal gases. The functions obtained for semi-ideal gas mixtures were extended by

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Nowak, Władysław, Aleksandra Borsukiewicz-Gozdur, and Sławomir Wiśniewski. "Influence of working fluid evaporation temperature in the near-critical point region on the effectiveness of ORC power plant operation." Archives of Thermodynamics 33, no. 3 (2012): 73–83. http://dx.doi.org/10.2478/v10173-012-0019-7.

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Abstract In the paper presented are definitions of specific indicators of power which characterize the operation of the organic Rankine cycle (ORC) plant. These quantities have been presented as function of evaporation temperature for selected working fluids of ORC installation. In the paper presented also is the procedure for selection of working fluid with the view of obtaining maximum power. In the procedure of selection of working fluid the mentioned above indicators are of primary importance. In order to obtain maximum power there ought to be selected such working fluids which evaporate c

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Części książek na temat "Specific enthalpy of the working bogy"

Kojima, Seiji. "Dynamic specific heat and glass transitions." In New Advances in Calorimetry [Working Title]. IntechOpen, 2023. http://dx.doi.org/10.5772/intechopen.1002805.

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The dynamical properties such as fragility, and non-Debye behavior of glass-forming materials have been studied by the frequency-dependent dynamic specific heat. Kubo’s formula on the fluctuation-dissipation theorem defines dynamic specific heat using the correlation function of enthalpy fluctuations. Dynamic specific heat is important for analyzing and understanding various relaxation processes. The dielectric relaxation is caused only by polar atomic motions, while the enthalpy relaxation is caused by total degrees of freedom of atomic motions. This chapter introduces two experimental method

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Leão Ferreira, Ivaldo, José Adilson de Castro, and Amauri Garcia. "On the Determination of Molar Heat Capacity of Transition Elements: From the Absolute Zero to the Melting Point." In Recent Advances on Numerical Simulations [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96880.

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Molar specific heat is one of the most important thermophysical properties to determine the sensible heat, heat of transformation, enthalpy, entropy, thermal conductivity, and many other physical properties present in several fields of physics, chemistry, materials science, metallurgy, and engineering. Recently, a model was proposed to calculate the Density of State by limiting the total number of modes by solid–liquid and solid–solid phase nucleation and by the entropy associated with phase transition. In this model, the new formulation of Debye’s equation encompasses the phonic, electronic,

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Gaganis, Vassilis. "Perturbation Theory and Phase Behavior Calculations Using Equation of State Models." In Perturbation Theory [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.93736.

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Equations of State (EoS) live at the heart of all thermodynamic calculations in chemical engineering applications as they allow for the determination of all related fluid properties such as vapor pressure, density, enthalpy, specific heat, and speed of sound, in an accurate and consistent way. Both macroscopic EoS models such as the classic cubic EoS models as well as models based on statistical mechanics and developed by means of perturbation theory are available. Under suitable pressure and temperature conditions, fluids of known composition may split in more than one phases, usually vapor a

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Trigui, Abdelwaheb. "Techniques for the Thermal Analysis of PCM." In Phase Change Materials - Technology and Applications [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.105935.

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Thermal Energy Storage (TES) technologies based on Phase Change Materials (PCMs) with small temperature differences have effectively promoted the development of clean and renewable energy. Today, accurate thermal characterization is needed to be able to create an optimal design for latent heat storage systems. The thermo-physical properties of PCMs, namely latent heat, phase-change temperatures, enthalpy and specific heat capacity are obtained by means of differential scanning calorimetry (DSC), which is one of the most widely used techniques to study reactions related to the transformation of

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Timushev, Sergey, Andrey Aksenov, and Jiawen Li. "Acoustic-Vortex Decomposition Method for CFD-CAA Study of Blade Machine Noise." In Vortex Dynamics - Theoretical, Experimental and Numerical Approaches [Working Title]. IntechOpen, 2024. http://dx.doi.org/10.5772/intechopen.1006111.

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This chapter presents a method for calculating the generation of pressure pulsations and noise emission by blade machines based on the decomposition of the compressible medium velocity field into vortex and acoustic modes. This method of acoustic-vortex decomposition of the basic equations of motion of a compressible medium leads to an inhomogeneous wave equation with respect to enthalpy pulsations, which includes pseudo-sonic oscillations in the source vortex region and acoustic oscillations in the near-field and far-field. The source function in the wave equation is determined from the indep

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Streszczenia konferencji na temat "Specific enthalpy of the working bogy"

Mittal, Garima, Imran Bhamji, Francesco Fanicchia, and Shiladitya Paul. "Development of Solution Precursor Plasma Spray TiO2/Al2O3 Composite Coatings for Heat Exchanger Application." In CORROSION 2021. AMPP, 2021. https://doi.org/10.5006/c2021-16304.

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Abstract Surface modification of the metal components involved in heat transfer is one of the passive methods used to enhance their heat transfer efficiency. Coatings with micro- or nano-scale features are widely employed to modify surfaces due to their enhanced surface area, which increases the number of boiling nucleation sites, leading to the generation of a higher number of bubbles. In geothermal power generation, due to the aggressive nature of the working fluid and chemistry of the geothermal brine, ceramic coatings are preferred. Along with having good compressive strength and hardness,

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Zhang, N., F. Sun, L. Zhu, et al. "Measurement of Specific Enthalpy under Very Low Pressure Plasma Spray Condition." In ITSC2011, edited by B. R. Marple, A. Agarwal, M. M. Hyland, et al. DVS Media GmbH, 2011. http://dx.doi.org/10.31399/asm.cp.itsc2011p0828.

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Abstract Very low pressure plasma spraying has been intensively studied in recent years especially the properties of plasma jet. These properties are affected by plasma generating and working conditions. These operating parameters such as arc power, plasma gas flow rate and chamber pressure have influences on specific enthalpy and temperature of plasma jet. In this work, the measurements under very low pressure were performed using enthalpy probe which was previously modified (increase of the internal diameter and depositing TBC coating (Ni/Al and ZrO2+ Y2O3) on the head). Different parameters

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Danov, Stanislav N., and Ashwani K. Gupta. "Influence of Imperfections in Working Media on Diesel Engine Indicator Process: Part 1 — Theory." In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/cie-6026.

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Abstract Several improvements to the mathematical model of the indicator process, taking place in a diesel engine cylinder, are proposed. The thermodynamic behavior of working media is described by the equation of state, valid for real gases. Analytical mathematical dependencies between thermal parameters (pressure, temperature, volume) and caloric parameters (internal energy, enthalpy, specific heat capacities) have been obtained. These equations have been applied to the various products encountered during the burning of fuel and the gas mixture as a whole in the engine cylinder under conditi

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Naumov, V. I., V. G. Kriukov, A. L. Abdullin, A. V. Demin, and R. L. Iskhakova. "Chemical Non-Equilibrium Model for Simulation of Combustion and Flow in Propulsion and Power Generation Systems." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-81033.

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Novel methodology of the simulation of combustion and flow in propulsion and power generation systems is developed. The basic concept of the methodology and model is division of the working volume into reactors on the ground of equations of motion or semi-empirical models of fluid flow. Each reactor is interpreted as a time-dependent volume with uniform non-stationary parameters. Mass- and heat-transfer between neighbor reactors are simulated. Time variation of chemical composition of working medium is described by equations of chemical kinetics derived in exponential form. Depending on the sp

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Danov, Stanislav N., and Ashwani K. Gupta. "Influence of Imperfections in the Working Media on Diesel Engine Indicator Process: Part 2 — Results." In ASME 1998 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/detc98/cie-6027.

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Abstract In the companion Part 1 of this two-part series paper several improvements to the mathematical model of the energy conversion processes, taking place in a diesel engine cylinder, have been proposed. Analytical mathematical dependencies between thermal parameters (pressure, temperature, volume) and caloric parameters (internal energy, enthalpy, specific heat capacities) have been obtained. These equations have been used to provide an improved mathematical model of diesel engine indicator process. The model is based on the first law of thermodynamics, by taking into account imperfection

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Redko, Andrii, Oleksandr Redko, Yurii Burda, and Yurii Pivnenko. "Aqueous mixture of pyridine as working fluid in steam turbine power plants for heat recovery of WHRS ORC technologies." In 24th International Scientific Conference Engineering for Rural Development. Latvia University of Life Sciences and Technologies, Faculty of Engineering and Information Technologies, 2025. https://doi.org/10.22616/erdev.2025.24.tf172.

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This paper presents the results of a comprehensive numerical analysis focused on the thermodynamic behaviour and performance of simple and combined cycle power plants operating within the temperature range of 673–723 K, with particular attention to their integration into waste heat recovery systems (WHRS). A combined thermal circuit is considered, consisting of a once-through waste heat recovery boiler, a high-pressure water steam turbine, and a secondary turbine operating on an organic working fluid within the framework of an organic Rankine cycle (ORC). As a central innovation, the study exp

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Efstathiadis, T., M. Rivarolo, A. I. Kalfas, A. Traverso, and P. Seferlis. "A Preliminary Turbine Design for an Organic Rankine Cycle." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-94481.

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An increasing trend in exploiting low enthalpy content energy sources, has led to a renewed interest in small-scale turbines for Organic Rankine Cycle applications. The design concept for such turbines can be quite different from either standard gas or steam turbine designs. The limited enthalpic content of many energy sources enforces the use of organic working media, with unusual properties for the turbine. A versatile cycle design and optimization requires the parameterization of the prime turbine design. In order to address the major challenges involved in this process, the present study d

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Afrazeh, Ali, Hiwa Khaledi, and Mohammad Bagher Ghofrani. "Modeling and Analysis of Power Conversion System for High Temperature Gas Cooled Reactor With Cogeneration." In ASME Turbo Expo 2008: Power for Land, Sea, and Air. ASMEDC, 2008. http://dx.doi.org/10.1115/gt2008-50952.

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A gas turbine in combination with a nuclear heat source has been subject of study for some years. This paper describes the advantages of a gas turbine combined with an inherently safe and well-proven nuclear heat source. The design of the power conversion system is based on a regenerative, non-intercooled, closed, direct Brayton cycle with high temperature gas-cooled reactor (HTGR), as heat source and helium gas as the working fluid. The plant produces electricity and hot water for district heating (DH). Variation of specific heat, enthalpy and entropy of working fluid with pressure and temper

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Doty, F. David, and Siddarth Shevgoor. "A Dual-Source Organic Rankine Cycle (DORC) for Improved Efficiency in Conversion of Dual Low- and Mid-Grade Heat Sources." In ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/es2009-90220.

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Detailed thermodynamic and systems analyses show that a novel hybrid cycle, in which a low-grade (and low-cost) heat source (340 K to 460 K) provides the boiling enthalpy and some of the preheating while a mid-grade source (500 K to 800 K) provides the enthalpy for the final superheating, can achieve dramatic efficiency and cost advantages. Four of the more significant differences from prior bi-level cycles are that (1) only a single expander turbine (the most expensive component) is required, (2) condenser pressures are much higher, (3) the turbine inlet temperature (even with a low-grade geo

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Barbieri, Enrico Saverio, Mirko Morini, and Michele Pinelli. "Development of a Model for the Simulation of Organic Rankine Cycles Based on Group Contribution Techniques." In ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/gt2011-45616.

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Many industrial sectors and applications are characterized by the availability of low enthalpy thermal sources with temperatures lower than 400 °C, such as the ones deriving from both industrial processes (e.g. combustion products from gas turbines and internal combustion engines, technological processes and cooling systems) and renewable sources (e.g. solar and geothermal energy). The usual systems for the conversion of thermal energy into mechanical and/or electrical energy work due to the high temperature difference available between the source (i.e., combustion products) and the sink (i.e.

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