CSP Research Papers - Academia.edu (original) (raw)

- by
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- Algebra, Computer Science, Software Engineering, Semantics

Consistency properties and algorithms for achieving them are at the heart of the success of Constraint Programming. In this paper, we study the relational consistency property R( ,m)C, which is equivalent to m-wise consistency proposed in rela- tional databases. We also define wR( ,m)C, a weaker variant of this property. We propose an algorithm for enforcing these properties on a Constraint Satisfaction Problem by tighten- ing the existing relations and without introducing new ones. We empirically show that wR( ,m)C solves in a backtrack- free manner all the instances of some CSP benchmark classes, thus hinting at the tractability of those classes.

- by Shant Karakashian and +2
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- Constraint Programming, CSP, Backtracking, Constraint Satisfaction Problem

Industrial control systems are nowadays exposed in environments with rapid and unstable parameter changes and uses measuring equipments with critical output sensitivity. In the case of thermal gas analyzer, measurement errors are contributed by temperature, gas flow, and pressure. Error compensation is a key problem for these control systems. In recent years, it has been proven in the literature that artificial neural network (ANN) is a reliable and low cost solution to manage errors. Among all the algorithms of ANN, the back propagation is commonly used because of its simplicity and learning methodology is easy to realize. However, it has two notable drawbacks: (a) it is likely to run into local minimum, and (b) convergence is slow. Thermal conductivity gas analyzer often works in adverse surroundings, which requires fast and accurate measurements. Therefore, a strong learning network is needed. This paper proposes a novel thermal gas analyzer using adaptive neuro-fuzzy inference system. The effectiveness and validity of the proposed method is verified by simulation studies using MATLAB. Fuzzy membership rules are created to allow regulation of learning parameters. Further, the fuzzy adaptive network model is constructed to train large data samples while the high precision compensation of sensor error is realized by the improved flow. Simulation results reveal that the convergence speed and output accuracy is improved and the learning parameters in thermal gas analyzer are automatically corrected by the proposed method in comparison with the back propagation algorithm of artificial neural network.

- by Zhi Li
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- Computer Science, Formal methods, Formal Specification, Requirement Engineering
- by Kevin Chalmers
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- Distributed Computing, Computer Software, Concurrency, CSP
- by Silvia Lizeth Tapia Tarifa
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- Computer Science, Model Checking, Formal methods, Modeling Language
- by Malabi Venkatesan
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- CSP
- by Kai Keng Ang
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- Data Mining, Attention-Deficit/Hyperactivity Disorder, Rhythm, Cognition
- by Catherine Bessada and +1
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- Engineering, Economics, Solar Energy, High Temperature
- by Yassine Charabi
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- Engineering, Cartography, Electricity, Solar Power

An accurate estimate of fixed operating costs is essential to determine the financial viability of any proposed project. Although other researchers have reported maintenance costs for large-scale concentrating solar power (CSP) plants in the United States [1-2], there is currently little information available specifically for small-scale CSP or solar Industrial Process Heat (IPH) plants. This paper discusses the maintenance of an operating small-scale CSP plant in Louisiana over a four year period. The results are also applicable to a small-scale IPH plant. Maintenance activities and costs are discussed for the collector field, the power block, and the cooling tower. For the collector field, a study of the degradation of mirror reflectance between washings was performed for three different types of reflective polymer thin films (3M 1100, 3M 2020, and Konica Minolta). Overall, the 3M 2020 film provided better reflectivity between washings than the other films. An optimized mirror washing schedule was determined. Optimal mirror washing schedules are very site-dependent, but for this humid subtropical location, the most economical washing schedule was found to be every 114 days, or approximately three times per year. A recommended maintenance plan for small-scale CSP and IPH plants is presented and actual maintenance costs over a four year period are provided. It was found that maintenance costs for small-scale plants are substantially larger than for large-scale plants, and that maintenance costs for small-scale IPH plants are much lower than for small-scale CSP plants, making IPH applications significantly more attractive. The average annual maintenance cost for a small-scale CSP plant was found to be approximately 457/kWe,or457/kWe, or 457/kWe,or0.27/kWhe. For a small-scale IPH plant the costs were 3.72/m2,3.72/m 2 , 3.72/m2,7.81/kWt, and $0.005/kWht.

- by Kenneth A Ritter III PhD and +2
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- Solar Power, Maintenance, CSP, Concentrating Solar Power

This paper is an introduction to Real-Time Networks (RTNs) and to the literature on them. RTNs are a fundamental model of computation that consists of a collection of parallel 'activities' (i.e. single-threaded processes with internal state) which only communicate along explicit paths, each of which imposes a specific protocol. RTNs have underpinned various software design notations, such as MASCOT and DORIS, and RTNs are still often used by software architects when designing real-time software in other notations, such as UML. Important transferable concepts from MASCOT-3 and DORIS are introduced , including a rich family of predefined formalised RTN protocols. Sophisticated asynchronous implementations have been developed for the 'pool' protocol, making implementations of it possible which minimise the temporal interference between different parts of a system. Various formal analysis techniques have been taxed in showing the validity of these implementations. In particular, Simpson's 4-Slot asynchronous communication mechanism (ACM) has received extensive academic attention, and the conflicting results of this work have led to insights into how to classify ACMs; the importance, when modelling ACMs, of taking into account the way that the metastability phenomenon in asynchronous circuits is min-imalised; and the dangers and limitations of the 'atomicity' abstraction when specifying asynchronous protocols. Other formalisation and analysis techniques that have been developed for RTNs are described, including: ADL, a activity formal specification language; and SHARD, a hazard analysis technique for RTNs. It is explained why notations based on the synchrony hypothesis (such as Statecharts) are inadequate for specifying the behaviour of arbitrary RTN systems, and alternative proposals are introduced, including: Mode-machines; Transactions; and Interactions. Finally, RTNs are compared with the currently reigning 'OO' design paradigm, and it is argued that RTNs embody a sophisticated concurrent object-oriented computational paradigm that has yet to be fully appreciated by many OO software architects. RTNs and dynamic reconfigurable systems are briefly discussed.

- by Steve Paynter
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- Real-time Systems, UML, Real Time Embedded Systems, Asynchronous Communication

Este artículo trata sobre el cálculo de LEC (costo nivelado de
energía) de cinco plantas CSP (centrales térmicas solares) de
diferentes capacidades 20 MWe, 50 MWe, 100 MWe, 150 MWe
y 200 MWe. Los cálculos toman como referencia los costos
de generación de la planta Gemasolar (España) actualizados
hasta el 2018, el LEC es calculado sobre la base de la planta
óptima que nos configura el programa SAM (modelo de asesor
de sistema), realizando en él dieciocho simulaciones por cada
potencia de planta para determinar cual tiene el valor de LEC
mínimo. Como las simulaciones están proyectadas para la
ciudad de Arequipa, se usará la radiación directa de diseño de
1000 W/m2 [3]. Esta radiación directa, se introdujo en el SAM
para obtener la planta óptima en cada simulación. También se
revisó el LEC para la proyección de ochos horas de TES (energía
de almacenamiento térmico), usando valores del diseño de un
trabajo de fin de máster proyectado para la ciudad de Arequipa
para una planta termosolar de 100 MWe. Entre los principales
hallazgos se encuentran que, si es viable la generación eléctrica
con un LEC menor a la tarifa BT5B de SEAL, la planta de 100
MWe de un trabajo de fin de máster es posible, pero no es la
mejor planta, ya que una planta de 200 MWe tiene menor LEC
que esta. También se halló que la planta de 200 MWe y 8 horas
de almacenamiento térmico es la mejor planta para la ciudad de
Arequipa, pues tiene 2,73 % menos de costo que el LEC de la
tarifa local BT5B.

- by Revista I+i Investigación Aplicada e Innovación and +1
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- CSP, Concentrated Solar Power, LEC, DNI

Cloud Service Provider(CSP) and Cloud Service Consumer(CSC) work on the terms agreed in the Service Level Agreements(SLA). SLA is a written agreement which serves as the basis for the expected level of service the CSP must provide. As the CSP are enterprises that are profit driven it is beneficial for the CSP to cheat on the SLA. Hence CSP do not provide the facility of auditing the SLA. As such the CSC must be equipped to ensure that the services promised by the CSP are provided by it so that in case of breach of service, the CSC has sufficient evidences to claim for penalty. Moreover virtual machines are prone to attacks by malicious cloud actors. To aid the investigation process sufficient evidences are needed. Hence, a framework based on the concept of Third Party Auditor (TPA) is proposed in this paper. This TPA will be placed between the Cloud Service Provider (CSP) and the Cloud Service Consumer (CSC) to closely monitor terms and conditions of SLA and ensure that CSP satisfies all the conditions mentioned in the SLA. If it is violated then the framework detects and stores it in a database maintained for this purpose. The TPA will also monitor attempts by malicious cloud actors and maintain log of all such attempts. Snapshots of clients' virtual machines will also be stored at a regular interval.

- by Salvatore Fanali and +1
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- Analytical Chemistry, Electromigration, CS, HPLC

Solar energy is one of the cleanest sources of alternative energy. Due to high energy demand in one hand and environmental negative impact of fossil fuels, on the other hand, many countries consider the alternative energy sources as a suitable and feasible option in industry and domestic usage. It was discovered that the different applications of solar energy in industries are being accepted more than ever.

- by Prof. Dr. Saad Mekhilef
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- Agriculture, Solar thermal, High Energy Physics, GAS TURBINE

The performance of a gas turbine is significantly affected by the environmental conditions. Net power output of a gas turbine can be increased by reducing the compressor inlet air temperature. There are different techniques used for inlet air cooling of the gas turbines. These techniques are evaporative coolers, spray inlet coolers or fogging systems, and mechanical refrigeration or chillers where a heat exchanger cools the inlet air. To improve the efficiency of gas turbine power plants, Ice Thermal Energy Storage (ITES) systems can be used as inlet cooling system.
The aim of this study is to determine the use of an ITES system for a 239 MW powered gas turbine cycle, which is located in Bursa / Turkey. The performance of the system was investigated for full load conditions. Energy and exergy analysis were done by using last decade’s meteorological weather data. The results showed that utilizing the ITES system boosted the net power up to 12.60 %.

- by Muhsin Kiliç and +1
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- Thermal Engineering, Thermodynamics, Pressure gain combustion for gas turbines, GAS TURBINE

The climate condition affects the performance of the combined-cycle power plants. The efficiency of the combined
cycle is significantly influenced by the temperature, pressure and humidity of the air. When the ambient air
temperature increases, the density of the air decreases, and it leads to a reduction of power generated by the gas
turbine. In this work, the energy and exergy analysis of a commercial gas turbine, with inlet air cooling, was
performed. The effects of fogging system on gas-turbine performance studied. For this aim, the energy and exergy
balances were obtained for each piece of equipment. Calculations have been made for four different cases for the
regarded gas turbine system. Furthermore, exergetic efficiency, exergy destruction rates and improvement
potentials were obtained, and the results of the study demonstrated graphically. It is concluded that the net power
output of the gas turbine system increased at lower inlet temperatures and exergy destruction rates occurred from
highest to lowest as combustion chamber (CC), gas turbine (GT) and air compressor (AC), respectively.

- by Umit Unver and +1
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- Thermal Engineering, Thermodynamics, Pressure gain combustion for gas turbines, GAS TURBINE
- by Yehuda Naveh
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- Information Systems, Artificial Intelligence, Localization, Constraint Programming

Heliostats typically contribute to about 40 % of the total installed costs in a concentrated solar power (CSP) tower plant. The objective of this study is to investigate the effects of heliostat size on the levelized cost of electricity (LCOE). These effects are analysed in a power tower with a net capacity of 100 MWe with 8 hours of thermal energy storage in Upington, South Africa. A large, medium and a small sized heliostat with a total area of 115.56 m2, 43.33 m2 and 16.69 m2 respectively are considered for comparison. The heliostat cost per unit is calculated separately for the three different heliostat sizes and the effects due to size scaling, learning curve benefits and the price index is considered. The annual operation and maintenance (O&M) costs are estimated separately for the three heliostat fields, where the number of personnel required in the field is determined by the number of heliostats in the field. The LCOE values are used as a figure of merit to compare the different heliostat sizes. The lowest theoretical LCOE value of 0.1960 $/kWhe is achieved using the medium size heliostat with an area of 43.33 m2 for this power tower configuration.

- by Arvind Sastry
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- CSP, Heliostats
- by sunil nair
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- Information Systems, FPGA, Computer Software, Systematic Literature Review
- by Salvatore Fanali
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- Analytical Chemistry, Electromigration, CS, HPLC

Dissertação de Mestrado apresentada ao Programa de Pós-Graduação em Planejamento Energético, COPPE, da Universidade Federal do Rio de Janeiro, como parte dos requisitos necessários à obtenção do título de Mestre... more

Dissertação de Mestrado apresentada ao Programa
de Pós-Graduação em Planejamento Energético,
COPPE, da Universidade Federal do Rio de
Janeiro, como parte dos requisitos necessários à
obtenção do título de Mestre em Planejamento
Energético.

- by Rafael Soria and +1
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- Brazil, CSP, Concentrated Solar Power

Abstract: It is believed that energy issue is one of the most sensitive and complicated issues in the globe. Industrial energy consumption varies from 30% to 70% of total energy used in some selected countries and the global average stands at 37%. As a result of the successful implementation of the industrialization plan in 1985; Malaysia has changed from an agricultural economy into industrial based economy. The industrial sector represents the highest consuming sector and accounts for about 48% of all total energy demand.

Renewable electricity generation systems have an increasing trend in terms of usage due to aiming to
decrease greenhouse gas emissions and energy source diversification strategies of countries. Parabolic
trough, Fresnel, and solar tower systems have been used to generate solar thermal electricity around
the world. In this study, the effects of the selection of collector heat transfer fluid (HTF) and condenser
type on a concentrated solar thermal power plant were analyzed. Net power, net electrical efficiency,
and economic analysis were carried out for the selected HTFs for different collector outlet temperature
cases. In the case of condenser type selection four different systems were considered; water cooled, air
cooled (dry air) and air cooled with water spraying (spraying before fan and spraying before and after
fan). Levelized cost of energy (LCOE) and specific investment cost were calculated. According to the
results, specific investment cost and LCOE were found to be 4000 USD/kWel and 0.207 USD/kW h, respectively. Carbon tax/credit was also included to the calculations of LCOE and a comparison study was carried out for gas turbine, combined cycle and solar thermal power plant with thermal storage. Including carbon tax/credit to the LCOE shows that solar thermal power plant with heat storage can be competitive
when compared to gas turbines.

In this work, mathematical model of molten carbonates electrolyzer (MCEC) has been developed for its integration into concentrating solar power (CSP) plant. MCEC modeling has been based on electrochemical and thermodynamics approach using experimental information from a testing device. Despite the high temperature requirements for MCEC operation (above 500 º C), heat generation during the electrolysis process reduces the requirement of external heat addition. Energy optimization approach using ASPEN HYSYS pointed out that MCEC stable operation could be achieved for a wide temperature range of the feeding steam by using smart heat recovery diagram. Temperature conditions that are covering from exothermal to thermoneutral working conditions have been explored depending on the input thermal and electrical requirements. MCEC model described in this work has been encoded into TRNSYS platform for transient performance evaluation. Optimal integration scheme of MCEC coupled to linear-Fresnel solar plant has been proposed and sized for the hydrogen production of a refueling station.

- by Miguel A Reyes-Belmonte
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- Solar Energy, Hydrogen Production, CSP, Electrolyzers
- by Derman Duman
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- Combined Cycle Power Plants, TRNSYS simulation, CSP, ISCC
- by Marek Biziuk
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- Analytical Chemistry, HPLC, Tea, CSP
- by Benoit Decourt
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- CSP
- by Eugenio Villar
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- CSP, System-level design, Sr

CSP Ganged Heliostat Technologies
Investigations in a Tensile Based Non-imaging System
Abstract:
Background
Concentrating Solar Power (CSP) and specifically Power Tower or Beam Down type systems achieve high levels of solar concentration and efficiency. Collecting fields comprise a large fraction of the system installation and maintenance costs. Technological advances promise economically competitive solar power. Skysun, LLC proposes a ganged heliostat to significantly reduce these costs.
Method
Typically, a heliostat requires one each of the following: mirror module, support structure, dual axis drive, post/pedestal and foundation. Each of Skysun, LLC’s heliostats require: mirror module, reduced support structure and a single axis drive, eliminating the need for a pedestal and foundation for each heliostat. The ganged heliostat consists of two cables supporting a plurality of single-axis actuated heliostats. The cables act both as a supporting structure and as a translator of focusing motions to the many heliostats. The cables terminate to an actuated rotational member supported by a substantial post. Cable tension may be variable. This configuration reduces the ratio of posts and foundations to heliostats, and eliminates dual axis drive actuators, substituting single axis actuators instead. The ganged heliostat may be rotated to the vertical for ease of robotic cleaning and water reclamation. The ganged heliostat may also be inverted, with the reflective surface downward, to protect against weather events such as hail. Finally, the ganged heliostat may be secured to protect against high wind conditions.
The reflective surface, which can be deformed by cable and heliostat orientation, provides an efficient means to form a large concave collecting surface laying principally in the horizontal. Reflected incident rays, being non-normal, suffer from astigmatism. Novel deformations of the reflective surface eliminate astigmatic aberration. A toric - shaped deformation of the reflective surface reduces the size of a chosen astigmatic focus, yielding higher concentration. Latitudinal and longitudinal deformations maintain focus upon a fixed receiver. In the ideal, the astigmatic focus is reduced to a point.
Conclusion
The goal of this paper is to outline the relatively inexpensive methods utilized by Skysun’s ganged heliostat prototype and how the methodology may be scaled up. Skysun, LLC proposes a ganged heliostat to significantly reduce collecting field costs to $75/m2 installed.
Key words: solar concentrating CSP Power Tower Beam Down heliostat astigmatism deformation ganged

- by Jim Clair
- •
- Photonics, Adaptive Optics, Solar trackers and concentrators, CSP

The performance of a gas turbine is significantly affected by the environmental conditions. Net power output of a gas turbine can be increased by reducing the compressor inlet air temperature. There are different techniques used for inlet air cooling of the gas turbines. These techniques are evaporative coolers, spray inlet coolers or fogging systems, and mechanical refrigeration or chillers where a heat exchanger cools the inlet air. To improve the efficiency of gas turbine power plants, Ice Thermal Energy Storage (ITES) systems can be used as inlet cooling system. The aim of this study is to determine the use of an ITES system for a 239 MW powered gas turbine cycle, which is located in Bursa / Turkey. The performance of the system was investigated for full load conditions. Energy and exergy analysis were done by using last decade’s meteorological weather data. The results showed that utilizing the ITES system boosted the net power up to 12.60 %.

Constraint programming (CP) is one of the most effective techniques for solving practical operational
problems. The outstanding feature of the method is a set of constraints affecting a solution of a problem
can be imposed without a need to explicitly defining a linear relation among variables, i.e. an equation.
Nevertheless, the challenge of paramount importance in using this technique is how to present the
operational problem in a solvable Constraint Satisfaction Problem (CSP) model. The problem modelling is
problem independent and could be an exhaustive task at the beginning stage of problem solving,
particularly when the problem is a real-world practical problem. This paper investigates the application of
a simple grid puzzle game when a player attempts to solve practical scheduling problems. The examination
scheduling and logistic fleet scheduling are presented as operational games. The game‘s rules are set up
based on the operational practice. CP is then applied to solve the defined puzzle and the results show the
success of the proposed method. The benefit of using a grid puzzle as the model is that the method can
amplify the simplicity of CP in solving practical problems.

- by noppon choosri and +1
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- Constraint Programming, Constraint Satisfaction Problems, CSP, Examination Scheduling

The industrial sector is the largest user of energy in Malaysia. Industrial motors account for a major segment of total industrial energy use. Since motors are the principle energy users, different energy savings strategies have been applied to reduce their energy consumption and associated emissions released into the atmosphere. These strategies include using highly efficient motors, variable speed drive (VSD), and capacitor banks to improve the power factor. It has been estimated that there can be a total energy savings of 1765, 2703 and 3605 MWh by utilizing energy-efficient motors for 50%, 75% and 100% loads, respectively. It was also found that for different motor loads, an estimated US$115,936 US$173,019 and US$230,693 can be saved in anticipated energy costs. Similarly, it is hypothesized that a significant amount of energy can be saved using VSD and capacitor banks to reduce speed and improve the power factor, thus cutting energy costs. Moreover, a substantial reduction in the amount of emissions can be effected together with the associated energy savings for different energy savings strategies. In addition, the payback period for different energy savings strategies has been found to be reasonable in some cases.

- by Prof. Dr. Saad Mekhilef
- •
- Eurasian Nomads, Southeast Asia, Malaysia, Energy Conservation

Repowering of an existing steam power plant by means of solar concentrating collectors is examined as a viable option to decrease CO2 emissions and increase electric power production during daytime peak load energy demanding hours. In the proposed scheme, the regenerative bleeds from the steam turbine are partially intercepted while boiler feed-water is heated by means of parabolic solar trough concentrating collectors. It is considered that fossil boiler, steam turbine and condenser are the same of the original plant, without modifications. After choosing a steam cycle reproducing an existing power plant, the scheme of solar repowering is examined and the efficiency of conversion of the solar energy is optimized in relation to the characteristics of the solar collector. The paper shows that the modified scheme produces very little effects on the working conditions of the existing components, either at full load or partial load, and does not reduce the conversion efficiency of the fossil fuel. In comparison with solar thermal power plants with heat storage and only solar energy as thermal input, the proposed scheme is expected to have comparable efficiency but lower costs per kWh produced, as a consequence of the fact that there is no need for steam turbine, condenser, cooling tower and auxiliary boiler. Moreover it is expected that personnel and maintenance costs will be lower.

- by Sergio Camporeale
- •
- Renewable Energy, Solar Energy, Steam Turbine Thermodynamics, CSP

The potential of using different thermodynamic cycles coupled to a solar tower central receiver that uses a
novel heat transfer fluid is analyzed. The new fluid, named as DPS, is a dense suspension of solid particles aerated through a tubular receiver used to convert concentrated solar energy into thermal power. This novel fluid allows reaching high temperatures at the solar receiver what opens a wide range of possibilities for power cycle selection. This work has been focused into the assessment of power plant performance using conventional, but optimized cycles but also novel
thermodynamic concepts. Cases studied are ranging from subcritical steam Rankine cycle; open regenerative Brayton air configurations at medium and high temperature; combined cycle; closed regenerative Brayton helium scheme and closed recompression supercritical carbon dioxide Brayton cycle. Power cycle diagrams and working conditions for design point
are compared amongst the studied cases for a common reference thermal power of 57 MWth reaching the central cavity receiver. It has been found that Brayton air cycle working at high temperature or using supercritical carbon dioxide are the most promising solutions in terms of efficiency conversion for the power block of future generation by means of
concentrated solar power plants.

However, the design, control, and optimization of the hybrid systems are usually very complex tasks; the stand-alone hybrid solar–diesel power generation system is recognized generally more suitable than systems that only have one energy source for supply of electricity to off-grid applications. A proposed PV- system has been designed and optimized using HOMER software computer model to supply a potato cooled store in Kirkuk city in Iraq. The result obtained from the optimization gives the cost of energy (COE) is 0.639 US$/kWh with 2- axis trucking system and 0.692 US$/kWh with no trucking system. Energy cost is 0.796 US$/kWh when the load is supplied by the diesel generator alone.

- by Ehsan Fadhil and +1
- •
- GAS TURBINE, Renewable Energy Systems, Solar tower Power Technology, Energy and exergy based analysis in thermal systems

Gas-phase solar receivers can operate over a wider temperature range than receivers which use conventional liquid heat transfer media. However, due to their relatively poor heat transfer performance, gas-phase receivers require substantially more heat transfer area and/or higher flow rates to extract the same amount of heat which leads to more complicated designs (e.g. a porous-media absorber with small feature/pore size) and decreased reliability (e.g. internal temperature gradients and higher thermal stresses). Detailed numerical modelling techniques can help elucidate the fundamental heat and mass transfer mechanisms/interactions in such to help mitigate these risks and to create innovative, high-performance, designs. To collate the research efforts towards gas-phase receiver modelling, this paper systematically reviews—and critically compares—the latest numerical studies of various high-temperature gas-phase receiver designs. It was found that, from a numerical point of view, gas-phase receivers can be categorised by whether they contain a porous medium or not. This categorisation is crucial, because it dictates the numerical techniques needed to capture the underlying phenomena. This review also found that no standardised performance metrics are reported for gas-phase receivers. We suggest that a holistic figure of merit, such as the one developed by Lenert et al. (Lenert et al. 2012), be adopted in this field to merge all performance criteria for comparative evaluation. Overall, the present review is expected to serve as a guide for the development/enhancement of receiver designs based on linking best practices in simulation/modelling with the key features and limitations of gas-phase receivers.

The climate condition affects the performance of the combined-cycle power plants. The efficiency of the combined cycle is significantly influenced by the temperature, pressure and humidity of the air. When the ambient air temperature increases, the density of the air decreases, and it leads to a reduction of power generated by the gas turbine. In this work, the energy and exergy analysis of a commercial gas turbine, with inlet air cooling, was performed. The effects of fogging system on gas-turbine performance studied. For this aim, the energy and exergy balances were obtained for each piece of equipment. Calculations have been made for four different cases for the regarded gas turbine system. Furthermore, exergetic efficiency, exergy destruction rates and improvement potentials were obtained, and the results of the study demonstrated graphically. It is concluded that the net power output of the gas turbine system increased at lower inlet temperatures and exergy destruction rates oc...

- by Mehmet Ismailoðlu and +1
- •
- Thermal Engineering, Pressure gain combustion for gas turbines, GAS TURBINE, Chemical thermodynamics