Sistemas de Informacion Contable 3 by Roberto Angrisani, , By (author) Roberto Angrisani, By (author) Juan Carlos López. Sistemas De Informacion Contable 3 A&L 5/Edicion: angrisani/lopez: Books – Sistemas De Informacion Contable 3 C/Cd: Angrisani López: Books –
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Exergy and thermoeconomic evaluation ; Sistema tetra combinado de cogeracao.
Avaliacao exergetica e termoeconomica. The description and the exergy and thermo economic evaluation of a new cogeneration system, called tetra-combined cogeneration system, that generates electricity and chilled water for air conditioning purposes and eventually steam is presented.
The exergy and thermo economic performance exergy based costs of electricity, steam and chilled water production of this system is compared with the performances of conventional cogeneration systems, pointing out the advantages and disadvantages of this new system.
Thermoeconomic evaluation of air conditioning system with chilled water storage. As a good load shifting technology for power grid, chilled energy storage has been paid more and more attention, but it always consumes more energy than traditional air conditioning system, and the performance analysis is mostly from the viewpoint of peak-valley power price to get cost saving.
The paper presents a thermoeconomic evaluation methodology for the system with chilled energy storage, by which thermodynamic performance influence on cost saving has been revealed.
The results show that difference angriwani peak and valley power prices is not the only factor on economic performance, thermodynamic performance of the storage system is the more important factor, and too big price difference is a barrier for its application, instead of for more cost saving.
All kopez these give a new direction for thermal storage technology application. Thermo-economic evaluation of ORCs for various working fluids. An inclusive component-level technical and economic assessment procedure for the general design and operating strategy of Organic Rankine Cycles ORC for use across major application categories waste heat recovery, solar thermal, geothermal and sub-MW scales can be an important tool for leveraging the cost-effective deployment of low and medium temperature power cycles.
Previous analyses and design approaches tended to focus on thermodynamic efficiency rather than financial performance. To bridge this gap, a general thermo-economic optimization of sub kWe ORCs contabiliddad developed using a 7-dimensional design space with minimum investment cost per unit of nameplate electricity production as an objective function.
Parameters used include working fluid, heat source temperature, pinch in condenser, boiler HEX and regenerator, expander inlet pressure and air cooled condenser area. Thermoeconomic evaluation and optimization of a Brayton—Rankine—Kalina combined triple power cycle. Cost-balance and auxiliary equations are formulated for each component and for each node and solved through a MATLAB program to get the average cost per cpntabilidad exergy at different state points.
To evaluate the cost effectiveness of the system, the values of thermoeconomic variables for each component are calculated. Therefore, these components require greater attention. The performance of steam turbine, combustion chambers, recuperators and ammonia—water evaporator can be appreciably improved by capital investment into more efficient design due to their low values of exergoeconomic factor. The contabilidwd function of the thermoeconomic optimization is the minimization of the total cost rate for the whole plant.
Its minimum value is found to occur at a gas cycle pressure ratio of around Decreasing inlet air temperature decreases this objective function parameter significantly while increasing relative humidity causes a small decrease in it. Thermo-economic evaluation and optimization of the thermo-chemical conversion of biomass into methanol. In a carbon and resources constrained world, thermo-chemical conversion of lignocellulosic biomass into fuels and chemicals is regarded as a promising alternative to fossil resources derived products.
Methanol is one potential product which can angrissni used for the synthesis of various chemicals or as a fuel in fuel cells and internal combustion engines. This study focuses on the evaluation and optimization of the thermodynamic and economic performance of methanol production from biomass by applying process integration and optimization techniques. Results reveal the importance of the energy integration and in particular of the cogeneration of lopex for the efficient use of biomass. Directory of Open Access Journals Sweden.
The focus of this study is to analyse if an efficiency increase by using zeotropic congabilidad as working fluid overcompensates additional requirements regarding the major power plant components.
The contabilkdad approach is compared to systems with pure media. contabliidad
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Based on process simulations, heat exchange equipment is designed and cost estimations are performed. The uncertainties regarding fluid properties of zeotropic mixtures, mainly affect the heat exchange surface.
However, the influence on the determined economic parameter is marginal. In general, zeotropic mixtures are a promising approach to improve the economics of geothermal ORC systems. Additionally, the use of mixtures increases the spectrum of potential working fluids, which is important in context of present and future legal requirements considering fluorinated refrigerants.
Life cycle integrated thermoeconomic assessment method for energy conversion systems. Life cycle assessment LCA based thermoeconomic modelling has been applied for the evaluation of energy conversion systems since it provided more comprehensive and applicable assessment criteria. This anfrisani proposes an improved thermoeconomic method, named as life cycle integrated thermoeconomic assessment LCiTAwhich combines the LCA based enviroeconomic parameters in the production steps of the system components and fuel with the conventional thermoeconomic method for the energy conversion systems.
A micro-cogeneration system is investigated and analyzed with the LCiTA method, the comparative studies show that the unit cost of fuel by using the LCiTA method is 3. It is also realized that the enviroeconomic parameters during the operation of the system components do not have significant impacts on the system streams since the exergetic parameters are dominant in the contabiidad calculations.
Moreover, lopex improved sustainability index is found roundly To find the feasible operation conditions for the micro-cogeneration system, different assessment strategies are presented. Furthermore, a case study for Singapore is conducted to see the impact of the forecasted carbon dioxide prices on the thermoeconomic performance of the micro-cogeneration system. Thermodynamics, thermoeconomic and economic analysis of The thermoeconomic analysis proposes the distribution of costs based on thermodynamic concepts, enabling the evaluation of reflection of the investment costs and fuel in the cost of products steam and electricity.
The economic analysis acts as a deciding factor for acceptance or project rejection. Thermoeconomic optimization of small size central air conditioner. The application of thermoeconomic optimization design in an air-conditioning system is important in achieving economical life cycle cost. Previous work on thermoeconomic optimization mainly focused on directly calculating exergy input into the system.
However, it is usually difficult to do 33 because of the uncertainty of input power of fan on the air side of the heat-exchanger and that of pump in the system. This paper introduces a new concept that exergy input into the system can be substituted for the sum of exergy destruction and exergy output from the system according to conservation of exergy.
Although it is also difficult for a large-scale system to calculate exergy destruction, it is feasible to do so for a small-scale system, for instance, villa air conditioner VAC. In order to perform thermoeconomic optimization, a program anggisani firstly developed to evaluate the thermodynamic property of HFCa on the basis of Martin-Hou state equation.
Authors develop thermodynamic and thermoeconomic objective functions based on second law and thermoeconomic analysis of VAC system. Two optimization results are obtained. The design of VAC only aimed at decreasing contbilidad energy consumption is not comprehensive. Life cycle lopfz at thermoeconomic optimization is lower than that at thermodynamic optimization.
Exergy analysis and thermoeconomics in search of cost effective solutions Part 2: This paper briefly discusses the thermoeconomic evaluation and optimization of energy systems. The techniques involved are somewhat specialized and will not be described in detail here but will be summarized to the level necessary to discuss contabiludad applications and conclusions.
More details anhrisani thermoeconomics are given in References  through . Energy is not only a measure of the true thermodynamic value of an energy carrier but is also closely related to the economic value of the carrier lopezz users pay only for the useful part of energy.
A thermoeconomic analysis combines an energy analysis with an economic analysis at the component level. The angrieani of a detailed thermoeconomic analysis include all the objectives of an energy analysis see Part I of this paper in addition to the following: To shed light on the cost formation process, and, thus, facilitate studies to effectively reduce the product costs in an energy system.
To estimate economically optimal operating conditions for a given aangrisani configuration. To understand anrgisani interactions between the thermodynamic performance of each plant component and the cost of the final plant product s. To calculate the production costs of various products generated in the same process. To enable cost minimization studies in very complex energy systems. Are European Bioenergy Targets Achievable? The goal of the research project is dual.
Firstly, the creation of a multidimensional model 3E-model that could be used to assess how sustainable it is to produce 2nd generation biofuels in a specific region or country and at any scale. Unlike the previously mentioned methods, this new multidimensional model integrates 3 key parameters for a more accurate evaluationi.
Secondly, the model is applied to predict the feasibility of producing and implementing different biofuels i. The outcome of this analysis gives an overview of which countries are more promising in terms of production and distribution costs as well as CO2 emissions reduction.
Sistemas de Informacion Contable 3 – Roberto Angrisani, Juan Carlos Lopez – Google Books
Moreover, the accomplishment of the European Contabildad Policy i. Chapter 2 is devoted to introduce biomass availability in Europe, its distribution across the different regions and its composition. Chapter 3 deals with the design of the whole biomass-to-bioenergy conversion routes i. Mass and energy balances from Aspen Plus simulations are used in Chapter 4 to calculate the efficiency of biomass-to-bioenergy conversion plants from an energetic and exergetic point of view.
Sistemas de Informacion Contable 3
In Chapter 6, mass and energy balances from Aspen Plus simulations are exported to Aspen Icarus to calculate biofuels and bioelectricity ‘ex-work’ prices. Results from previous chapter are combined in Chapter 7 to build an own contabilisad 3E model. In Chapter 8 the multidimensional model is applied at European scale. Finally, the main conclusions of this thesis are presented in Chapter 9 together with the recommendations for future work.
Thermoeconomic studies applied to maintenance of power plants. The thermoeconomic method is an important tool aiming to improve maintenance activities in steam power plants, becoming possible lppez share the irreversibilities costs to each equipment, as boilers, turbines and heat cobtabilidad.
Furthermore, the effects related to changes in operational and design parameters can be studied in a detailed way, evaluating the local and distributed effects.
In this work, after a brief review of power plant maintenance costs concepts and values, one address a methodology for maintenance costs estimation and develops a case study of thermoeconomics of a hypothetical plant, presenting the exergy flows, exergy losses and maintenance costs distribution.
Also is presented an evaluation of exergoeconomic maintenance cost, evaluating their significance, at equipment level, related to overall maintenance cost, aiming to help the maintenance activities planning. Exergy and thermoeconomic angriwani of hydrogen production from natural gas; Avaliacao exergetica e termo-economica da producao de hidrogenio a partir do gas natural. Fontabilidad paper presents exergy and thermoeconomic analysis of a complete hydrogen production unit of a petroleum refinery.
Based on a contabilirad plant of the hydrogen production unit, the exergy efficiency of each component and of the contabiludad plant are calculated. The hydrogen production cost is determined by means of a thermoeconomic analysis in which the equality cost partition method is employed, including capital and operational costs, in order to determine the production cost of hydrogen and other products of the plant.
Before market penetration, high efficiency modular concepts have to be developed to achieve appropriate economic value for industrial decision makers. This paper aims to investigate modularly designed ORC systems from a thermoeconomic point of view. The main goal is a recommendation for a suitable chemical class of working fluids, preferable ORC design and a range of heat source temperatures and thermal capacities in which modular ORCs can be economically feasible.
For this purpose, a thermoeconomic model has been developed which is based on size and complexity parameters of the ORC components. Special emphasis has been angrizani on the turbine model. The paper reveals that alkylbenzenes lead to higher exergetic efficiencies compared to alkanes and siloxanes.
However, based angrisain the thermoeconomic model, the payback periods of the chemical classes are almost identical.