Exergy, Exergoeconomic, Exergoenvironmental, Emergy-based Assessment and Advanced Exergy-based Analysis of an Integrated Solar Combined Cycle Power Plant

2021 ◽  
pp. 0958305X2110635
Author(s):  
M. Nourpour ◽  
M. H. Khoshgoftar Manesh ◽  
A. Pirozfar ◽  
M. Delpisheh
Keyword(s):  
Solar Energy ◽  
Exergy Analysis ◽  
Thermodynamic Simulation ◽  
Combined Cycle ◽  
Energy Concentration ◽  
Analysis Tool ◽  
Matlab Code ◽  
Cycle System ◽  
Depth Analysis ◽  
Advanced Analysis

The high amount of solar energy as clean and sustainable energy has increased awareness in solar energy concentration, especially in integrated concepts. One of the best and promising hybrid configurations for converting solar energy into power is an integrated solar combined cycle system (ISCCS). In this study, conventional and advanced analysis tools for the ISCCS located in Yazd (Iran) have been investigated. In this paper, thermodynamic simulation, exergy, exergoeconomic, and exergoenvironmental analysis based on Life Cycle Assessment (LCA) have been performed. In addition, an emergy-based concept, including emergoeconomic and emergoenvironmental assessment, has been performed. In-depth analysis of exergy, exergoeconomic, and exergoenvironmental modelling, advanced exergy analysis based on endogenous/exogenous and avoidable/unavoidable parts have been done. In this regard, MATLAB code has been developed for thermodynamic simulation, exergy, exergoeconomic, exergoenvironment, emergoeconomic and emergoenvironment analysis. Furthermore, THERMOFLEX (commercial software) applied for thermodynamic simulation and verification. The Sankey diagram based on each analysis tool has been constructed. Furthermore, the priority of improvement based on each analysis has been identified. The thermal efficiency and net power generation of ISCCS are 48.25% and 419600 kW, respectively. It was obsereved that in most equipment, less than 10% of exergy destruction and cost and environmental impact rates were avoidable/endogenous.

scholarly journals Performance Study of a Novel Integrated Solar Combined Cycle System

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3400 ◽  
Author(s):  
Liqiang Duan ◽  
Zhen Wang
Keyword(s):  
Solar Energy ◽  
Meteorological Data ◽  
Lithium Bromide ◽  
Combined Cycle ◽  
Air Cooling ◽  
Absorption Refrigeration ◽  
Performance Study ◽  
Levelized Cost Of Electricity ◽  
Cycle System ◽  
New System

Based on a traditional integrated solar combined cycle system, a novel integrated solar combined cycle (ISCC) system is proposed, which preferentially integrates the solar energy driven lithium bromide absorption refrigeration system that is used to cool the gas turbine inlet air in this paper. Both the Aspen Plus and EBSILON softwares are used to build the models of the overall system. Both the thermodynamic performance and economic performance of the new system are compared with those of the traditional ISCC system without the inlet air cooling process. The new system can regulate the proportions of solar energy integrated in the refrigerator and the heat recovery steam generator (HRSG) based on the daily meteorological data, and the benefits of the solar energy integrated with the absorption refrigeration are greater than with the HRSG. The results of both the typical day performance and annual performance of different systems show that the new system has higher daily and annual system thermal efficiencies (52.90% and 57.00%, respectively), higher daily and annual solar photoelectric efficiencies (31.10% and 22.31%, respectively), and higher daily and annual solar photoelectric exergy efficiencies (33.30% and 23.87%, respectively) than the traditional ISCC system. The solar energy levelized cost of electricity of the new ISCC system is 0.181 $/kW·h, which is 0.061 $/kW·h lower than that of the traditional ISCC system.

Exergy analysis of an integrated solar combined cycle system

2010 ◽  
Vol 35 (10) ◽  
pp. 2157-2164 ◽  
Author(s):  
A. Baghernejad ◽  
M. Yaghoubi
Keyword(s):  
Exergy Analysis ◽  
Combined Cycle ◽  
Cycle System

Study on a New Solar Thermal Energy Complementary Power Generation System Based on Gas-Steam Combined Cycle

2019 ◽  
Author(s):  
Duan Liqiang ◽  
Lv Zhipeng ◽  
Wang Zhen
Keyword(s):  
Power Generation ◽  
Solar Energy ◽  
Thermal Efficiency ◽  
Combined Cycle ◽  
Energy Utilization ◽  
Solar Thermal ◽  
Solar Power Generation ◽  
Cycle System ◽  
Solar Energy Utilization ◽  
New System

Abstract The integrated solar energy-driven chiller combined cycle system (SCCC) has a problem of low annual solar energy utilization. The solar thermal efficiency and power output of the traditional integrated solar combined cycle system (ISCC) are limited by the integrated solar mirror field area and Rankine cycle efficiency. This paper presents a new system, on the basis of the combined cycle system with the three pressure HRSG with reheat, the solar energy is integrated into the chiller for cooling the compressor inlet air of gas turbine and the heat recovery steam generator (HRSG) for increasing the power output simultaneously. The Aspen Plus, TRNSYS and EBSILON softwares are applied in this paper to build the models of the overall system. The solar thermal efficiency, annual solar power generation and annual solar thermal efficiency are used to evaluate the performances of the new system, the traditional ISCC system and SCCC system. During the summer solstice, the proportions of solar energy used in cooling and heating are set as 40% and 60% in new system, respectively. The research results show that the new system has a higher power output (406.37MW), thermal cycle efficiency (53.61%) and solar thermal efficiency (48.85%) compared with the traditional ISCC system (385.63MW, 51.67%, and 24.43%, respectively) at the design point. The new system can regulates the proportions of solar energy used in the chiller and HRSG based on the monthly meteorological data, in order to maximize the annual solar energy utilization and annual solar power generation. The new system’s annual solar energy utilization hours (2071h) and solar power generation (25.863GW·h) are far greater than those of SCCC system (1498h, 18.185GW·h, respectively). Therefore, the proposed new system with the simultaneous integrations of solar energy with both the chiller and HRSG not only greatly increases the utilization rate of solar energy, but also has the significant thermodynamic advantages.

Advanced Combined Cycle Systems Based on Methanol Indirect Combustion

2011 ◽  
Author(s):  
Shimin Deng ◽  
Rory Hynes
Keyword(s):  
Co2 Capture ◽  
Exergy Analysis ◽  
Aspen Plus ◽  
Combined Cycle ◽  
Commercial Application ◽  
Cycle System ◽  
Cycle Systems ◽  
Chemical Exergy

In this paper, two new combined cycle systems with/without CO2 capture based on methanol indirect combustion are developed, which have significantly higher efficiency than methanol fueled conventional combined cycle. The performance of the new systems is compared with conventional combined cycle to identify the potentials of methanol indirect combustion. The systems are modeled by using Aspen Plus™ and GTPro™. Exergy analysis and the principle of cascade utilization of chemical exergy reasonably explain the improved efficiency of the new systems. Other merits of the combined cycle system based on methanol indirect combustion are discussed and its promising commercial application aspects are pointed out.

Comparison Study of Two Different Integrated Solar Combined Cycle Systems

2020 ◽  
Author(s):  
Liqiang Duan ◽  
Zhen Wang ◽  
Yulei Liu ◽  
Liping Pang
Keyword(s):  
Solar Energy ◽  
Ambient Temperature ◽  
Combined Cycle ◽  
Energy Integration ◽  
Operation Optimization ◽  
Cycle System ◽  
Collector System ◽  
Concentrated Solar Energy ◽  
Cycle Systems ◽  
Topping Cycle

Abstract The thermodynamic performances of the two different integrated solar combined cycle (ISCC) systems are compared in this paper. Different from the previous comparison researches of ISCC systems based on different solar energy collecting technologies, the goal of this paper is to compare the integration characteristics of two different configurations of integrating concentrated solar energy into a gas turbine combined cycle (GTCC) system based on the same solar collector system. For the first kind of integrated solar gas-steam combined cycle system (ISCC1), the solar energy is introduced to the topping cycle of the gas-steam combined cycle system, while for the second kind of integrated solar gas-steam combined cycle system (ISCC2), the solar energy is introduced to the bottoming cycle of the GTCC system. The detailed system models are developed and their thermal performances are compared under different conditions. For ISCC1, the solar-to-electricity efficiency is higher than that of ISCC2 at the design condition when both the direct normal irradiation and ambient temperature are high due to more efficient energy conversion to electricity. However, the ISCC2 offers the advantages of higher solar-to-electricity efficiency and more solar power output when both the direct normal irradiation and ambient temperature are low. Two ISCC systems are good for energy saving, the ISCC1 consumes 4.412 × 108 kg of fuel a year, which is 2.803 × 106 kg less than that of ISCC2, and the ISCC1 has an annual solar-to-electricity efficiency of 23.93%, 0.88% higher than that of ISCC2. Detailed daily and monthly simulation results show that two systems have advantages of saving energy, and the simulations results show the obvious effects of different solar energy integration modes on the overall IGCC system performance. The achievements of this paper can offer valuable references for the design and operation optimization of ISCC system.

scholarly journals Study of an Integrated Tower Solar Energy Combined Cycle System with the Simultaneous Integration Solar Energy with Top and Bottom Cycle

2019 ◽  
Vol 2 (4) ◽  
Keyword(s):  
Solar Radiation ◽  
Solar Energy ◽  
Combined Cycle ◽  
Energy Utilization ◽  
Summer Solstice ◽  
Operating Characteristics ◽  
Cycle System ◽  
Collector System ◽  
Simultaneous Integration ◽  
New System

In this paper, based on a conventional integrated solar combined cycle system (ISCC), a novel integrated tower solar energy combined cycle system (ITSCC) with the simultaneous integration the solar energy with top and bottom cycle of combined cycle system is proposed. The system models are developed and different system performance evaluation indices are proposed. Then in the condition of the same solar radiation the thermal performance of new system is analyzed and compared with the reference ISCC system and gas-steam combined cycle (GTCC) system. Furthermore, the operating characteristics of the new system in the summer solstice are deeply investigated in consideration of the heat variation from direct solar radiation and the effect of the ambient temperature change on the solar collector system. The efficiency of solar energy utilization and the thermodynamic properties of different systems are analyzed. The result shows that, in the summer solstice the natural gas input of new system is less 3.28% than that of GTCC system and the net output power is increased by 1.5%, the solar-to-electric efficiency and the exergy efficiency can achieve 27.3% and 28.4%, respectively. In addition, the annual performance of new system is also better than that of the reference system.

A Comparative Evaluation of Advanced Combined Cycle Alternatives

1991 ◽  
Vol 113 (2) ◽  
pp. 190-197 ◽  
Author(s):  
O. Bolland
Keyword(s):  
Heat Transfer ◽  
Steam Turbine ◽  
Comparative Evaluation ◽  
Exergy Analysis ◽  
Combined Cycle ◽  
Heat Transfer Area ◽  
Turbine Condenser ◽  
Pressure Cycle ◽  
Steam Turbine Condenser ◽  
Exergy Balance

This paper presents a comparison of measures to improve the efficiency of combined gas and steam turbine cycles. A typical modern dual pressure combined cycle has been chosen as a reference. Several alternative arrangements to improve the efficiency are considered. These comprise the dual pressure reheat cycle, the triple pressure cycle, the triple pressure reheat cycle, the dual pressure supercritical reheat cycle, and the triple pressure supercritical reheat cycle. The effect of supplementary firing is also considered for some cases. The different alternatives are compared with respect to efficiency, required heat transfer area, and stack temperature. A full exergy analysis is given to explain the performance differences for the cycle alternatives. The exergy balance shows a detailed breakdown of all system losses for the HRSG, steam turbine, condenser, and piping.

Social appreciation for the improvement of tourism management of 20th-century heritage: a methodological proposal

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Gema Ramírez-Guerrero ◽  
Javier García-Onetti ◽  
Juan Adolfo Chica-Ruiz ◽  
Manuel Arcíla-Garrido
Keyword(s):  
20Th Century ◽  
Management Tool ◽  
Future Research ◽  
Analysis Tool ◽  
Content Type ◽  
Cultural Assets ◽  
Current State ◽  
The Social ◽  
Depth Analysis ◽  
The Creation

Purpose This paper attempts to fill the gap that exists in research regarding 20th-century heritage and its social appreciation. The purpose of this paper is to explore different ways of evaluating the heritage value and tourism potential and to propose an innovative model validated in the Zarzuela Hippodrome as an example of cultural asset from 20th century with important economic, social, cultural, aesthetic and architectural aspects. Design/methodology/approach This study opted for an interpretation of heritage from an ecosystem, integrating and global paradigm, understanding the asset as a set of resources that interact with each other, generating a common and enriched tourist experience among all the elements that make it up. From this perspective, it is conceived that by modifying one of the elements, the whole (tourist) ecosystem will be equally influenced. On the other side, it was incorporated non-parametric techniques based on the implementation of surveys for the validation of the tool to the case study of the Zarzuela hippodrome. Findings The results suggest that the hippodrome's internal values have been evaluated very positively, while its external values are low. Through this study, the paper has identified several weaknesses that impede its functioning as a viable “tourist product.” The distance from the city center, the lack of available information and the scarce diffusion and tourism promotion are its main weaknesses. The proposed analysis tool reveals the importance of the active participation of visitors to evaluate cultural assets through the combination of aspects related to the conservation of cultural assets and, in turn, elements that encourage their commodification as tourist products, break down barriers between these two disciplines. Research limitations/implications The management tool proposed in this study can be used to underpin the creation of tourism experiences in cultural or heritage assets by diagnosing the current state of its tourist potential, quantifying its value in relation to the visitors’ perception and making visible those problematic aspects to develop actions to solve them. Although the present study is support for future research, as well as for improving the marketing of heritage in tourist settings, an in-depth analysis of the technical elements of heritage, as well as of its intervention (if applicable), will be necessary for the managers who want to use the tool. Social implications One of the most differentiating characteristics between the construction typology of 20th-century historical buildings is perhaps the scarcity of decorative ornamentation, with exposed concrete being the main surface coating. Many of these constructions have an important cultural and historical relevance, however, the social perception, as regards its consideration as architectural and artistic heritage seems to reflect discordant aspects. This study provides support as a decision-making tool to determine the existing valuation of a building and how to enhance it. Originality/value This study takes steps toward the creation of a model that supports decision-makers and owners of cultural assets through a measurement system that makes it possible to quantify and determine the current state of tourism use through the social evaluation of heritage criteria. It defines which are the elements that favor the resilience of the property or, on the contrary, which are those that undermine its enhancement.

scholarly journals Design, Construction, and Testing of a Gasifier-Specific Solid Oxide Fuel Cell System

Energies ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1985 ◽  
Author(s):  
Alvaro Fernandes ◽  
Joerg Brabandt ◽  
Oliver Posdziech ◽  
Ali Saadabadi ◽  
Mayra Recalde ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Exergy Analysis ◽  
Thermodynamic Simulation ◽  
Cell System ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Fuel Cell System ◽  
Simulation Results ◽  
Design Construction

This paper describes the steps involved in the design, construction, and testing of a gasifier-specific solid oxide fuel cell (SOFC) system. The design choices are based on reported thermodynamic simulation results for the entire gasifier- gas cleanup-SOFC system. The constructed SOFC system is tested and the measured parameters are compared with those given by a system simulation. Furthermore, a detailed exergy analysis is performed to determine the components responsible for poor efficiency. It is concluded that the SOFC system demonstrates reasonable agreement with the simulated results. Furthermore, based on the exergy results, the components causing major irreversible performance losses are identified.

Sign in / Sign up

Export Citation Format

Share Document