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In this paper, an off-design performance prediction model for a single shaft industrial gas turbine (IGT) using Microsoft Excel with Visual Basic for Applications (VBA) programming is presented. The modelling architecture is comprised of fundamental thermodynamic equations describing the performance of IGTs. A graphical user interface has been constructed to allow an easy interaction of the model...
The article is devoted to the investigation of the structure of macro- and mesopores on the surface and inside of modified NH4NO3 granules. The main quality indicators of modified NH4NO3 granules are presented and the relationship between the nanoporous structure of granules and the quality indicators is shown. Various thermodynamic conditions for obtaining a nanoporous structure of the surface and...
The article deals with justification to choose optimal thermodynamic condiions to generate porous ammonium nitrate in the vortex granulators. Advantages of granules modification are justified by way of humidification and further thermal treatment. The necessity to improve technologies for porous ammonium nitrate generation is shown with aim to form meso- and macropores on the surface of the granule...
Aiming at the parameter identification problem of catalyst protected region in the process of propylene oxidation, a novel parameter identification method has been proposed for catalyst protected region using an adaptive simulated annealing particle swarm optimization (ASAPSO) algorithm. Synchronous change learning factors and linear decrease progressively inertia weights are embedded in the simulated...
Thermodynamic models are a perfect tool to describe heat engines. But such thermodynamic model must be extended to reflect reality as accurately as possible. Micro turbo compressor engines are a specific type of heat engines that are derived from normal turbo compressor engines. To compute their thermodynamic parameters we need to know their dimensions and choose many coefficients, which describe...
In automobiles, cruise speed and fuel flow controls are very essential features to know about the overall energy efficiency of the vehicle system. There should be an effective control system to run the vehicle for maximum efficiency by reducing the losses such as parasitic losses, frictional loses, power train loses, rolling resistances, loses occurs while applying braking. For achieving this, ECU...
Estimation method for thermodynamic properties of organics in liquid fuel are proposed in this work. Especially this method can be applied to bio-oil produced from biomass pyrolysis. Thermodynamic properties of more than 600 compounds, which can be obtained in NIST chemistry webbook, were investigated for the estimation of thermodynamic properties. Simple estimation methods for the heat capacity and...
Heat transfer plants with organic media have often been able to replace or improve the classic steam-water operation. The possibility of transferring and closely controlling temperature up to > 300°C has provided the heat transfer media technology with many new fields of application. This growing application of heat transfer plants with liquid heat transfer media other than water has made it necessary...
This work presents a study on the influence of the main operating variables on the gas turbine cycle. A numerical simulation of a gas turbine cycle is performed for a net power of 100 MW. A calculation code is developed using EES software. The operating variables for values usually adopted for the various designs of gas turbine cycles. The optimal values of the process variables are defined. We obtain...
Genetic-algorithm approach has extensively popular as a powerful optimization tool been applied for engineering solutions. In this proposed technique a significant interest is in reducing dependence of the imported petroleum of the country. In contrast to the existing methods, the proposed technique implements the genetic-algorithm based system for enhancement of fuel efficiency of vehicle. As the...
Power system operation planning involves the best utilization of all available energy sources subjected to various constraints. It includes transfer of electric energy from generating companies to the consumers with maximum safety, continuity, quality and minimum operating cost. The minimum operating cost is obtained by scheduling available cheaper units. Unit commitment involves hour to hour ordering...
Assignments of the vessels change suddenly sometimes, so the marine steam vessels need better thermoeconomic. Based on the thermodynamic calculation theory, thermodynamic calculation models of equipments in marine steam power plants are developed. Then, the thermoeconomic calculation model of marine steam power plants is established with index of fuel consumption of one nautical mile. Also utility...
The thermodynamic behaviour of potassium during rice straw combustion are studied based on the chemical thermal equilibrium analysis as well as simulating the influence of additives by adding aluminium and sulfur to the system. The chemical morphology and physical phase of potassium are compared under the oxidizing atmosphere in a temperature range from 500????C??`1400????C??DThe results show that...
Thermodynamic calculations for CO2 hydrogenation to formic acid has been analysed by using Virial state equation which contains only the Second Virial Coefficient. On the assumption that the number of moles of CO2 is nCO2 = 1 and the molar ratio of H2 to CO2 is nH2/nCO2 = n, effects of reaction temperature, pressure and n(H2)/n(CO2) on equilibrium compositions in system were studied. The results showed...
FactSage6.1 thermodynamic simulation software used to simulate a close system(SO2:0.4v%,CO2:16v%,N2:75v%,O2: 5v%, Ca/S=1∶1)in all matter well mixing at 873∼1073 K and 1atm pressure. Studied the simultaneous CO2 /SO2 capture characteristics of CaO-based sorbent in different temperature, different CO2,SO2 partial pressure and different oxygen content. The result shows: In absence oxygen system CaO-based...
Using biomass for energy generation is getting increasing attention. At present, gasification of biomass is taken as a popular technical route to produce synthesized gas for application in boiler, engine, gas turbine or fuel cell. In this study, a new approach of steam reforming of biomass and glycerol for synthesized gas production has been primarily investigated in a fixed-bed reactor. The effects...
The mathematical model of the gas turbine performance in the condition of fault is established by using the exergy efficiency, which as a figure of merit of the work potential that based on the second law of thermodynamics. The performance matrix of fault model is derived by using the small deviation method. The exergy efficiency is contrasted with the efficiency, which is the traditional function...
This study examines the performance of a high-temperature solid oxide fuel cell combined with a conventional recuperative gas turbine (GT-SOFC) plant, as well as the irreversibility within the system. Individual models are developed for each component, based on the first and second laws of thermodynamics. The overall system performance is then analyzed by applying thermodynamic laws for the entire...
Based on energy balance, a three-dimensional zone method mathematic model on conventional reheating furnace is set up. By coupling with heat flux of slab surface, the temperature fields of furnace gas zones and furnace wall zones is obtained by using the main variable-correction method, and slab temperature fields by finite difference method. Under typical working condition, the model is verified...
In this paper, some evaluation methods for regenerative feed heating system of power plant are presented such as exergy loss, exergy efficiency, exergy loss rate and fuel specific consumption accrual. These methods are all based on the second law of thermodynamics. Exergy efficiency effect the thermodynamic perfect degree of the heater. Exergy loss and exergy loss rate provide the exergy loss distribution...
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