Performance Study of a Novel Integrated Solar Combined Cycle System

Duan, Liqiang; Wang, Zhen

doi:10.3390/en11123400

Cited by 10 publications

(2 citation statements)

References 24 publications

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“…The plant without air intake cooling had the highest carbon emissions and the lowest LCOE was achieved when integrating absorption chillers. Duan et al 11 also demonstrate the positive impact of integrating a solar energy‐driven lithium bromide adsorption system to cool the air intake of GT in a novel integrated solar combined cycle system. Both the typical daily and annual thermodynamic efficiencies are improved in addition to a lower LCOE for the novel system compared to a traditional integrated solar combined cycle (ISCC).…”

Section: Introductionmentioning

confidence: 99%

Performance improvement of cogeneration plants in hot arid regions via sustainable turbine inlet air cooling technologies: An energy‐water nexus comparative case study

Abdulrahim

Chung

2021

Int J Energy Res

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Summary In freshwater‐scarce coastal regions, increasing water demand has always been met via coupling thermal desalination systems with combined heat and power plants for many decades. These mature hybrid plants are known as cogeneration power and desalination plants (CPDP). Gas turbine (GT) driven CPDPs to suffer a performance drop in the summer months due to the high‐temperature ambient air intake which coincides with the season when power demand is highest. As a result, fuel consumption increases significantly to maintain these plants at full load conditions. At the expense of purified water, evaporative cooling (EC) has been proven to be a cost‐effective solution to combat the degradation in the plants' performance in the summer months. Several studies in the past propose the more complex waste heat or solar energy‐fired absorption refrigeration (AR) systems to combat this performance degradation. By performing an energy/exergy analysis and an hour‐by‐hour simulation on a conceptual plant representing an existing utility‐scale GT‐driven CPDP, this study analyzes the thermodynamic performance with and without EC and AR systems. Based on the simulation results, the power generated per GT unit decreases 0.65% for every 1°C rise in ambient air temperature. As a result, the plant's total fuel consumption increases by up to 12.4% relative to the design conditions to maintain the 100% power and water load. At the average summer conditions, integrating EC and AR systems increases the energy utilization factor of the plant by 5.89% and 9.11%, respectively. The plant's overall exergetic efficiency also increases by 5.96% and 6.73%, respectively. While EC systems increase the plant's annual in‐house water consumption by 32.4%, the annual total freshwater exports reduce by 0.151% only. Payback periods were calculated to be 1.84 and 5.70 years when integrating EC and AR systems, respectively and emissions savings ranged from 139 to 187 million kg of CO2 annually.

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Section: Introductionmentioning

confidence: 99%

Performance improvement of cogeneration plants in hot arid regions via sustainable turbine inlet air cooling technologies: An energy‐water nexus comparative case study

Abdulrahim

Chung

2021

Int J Energy Res

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“…As can be seen from Figure 1, big changes have taken place in the energy structure used for power generation, and the proportion of renewable energy power generation has been rising. As an important component of new energy, solar energy has become one of the most promising energy sources [5,6] due to its almost unlimited, clean and pollution-free nature [7]. The newly added photovoltaic power generation accounts for almost a quarter of the world's power generation increases [8], and the installed capacity of photovoltaic power generation in various countries or regions is shown in Figure 2.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Driving Factors of Photovoltaic Power Generation Efficiency: A Case Study in China

et al. 2019

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With the increasing consumption of fossil energy and changes in the ecological environment, meeting the energy demands required for industrial and economic development with clean and efficient power generation is a major challenge of our society. Solar energy is considered to be one of the most renewable and sustainable energy sources, and photovoltaic power generation has become an important research topic. This study combines data envelopment analysis (DEA) with Tobit regression analysis to assess the efficiency of photovoltaic power generation in China and analyze factors affecting efficiency to improve the efficiency of photovoltaic power generation. The results show that there are obvious regional differences in photovoltaic power generation efficiency in China. The phenomenon of focusing on economic development at the expense of the use of solar power generation still exists. The establishment of photovoltaic demonstration projects, the implementation of differential electricity price policies, and the promotion of photovoltaic precision poverty alleviation can alleviate economic pressure and effectively improve the efficiency of photovoltaic power generation.

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Study on integrated solar combined cycle system with a new operation strategy of changeable integration mode under different Direct Normal Irradiance (DNI) conditions

Wang

Duan

2020

Energy Science & Engineering

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Integrated solar combined cycle (ISCC) system, which integrates solar thermal energy into traditional gas turbine combined cycle (GTCC) system, has become an efficient way to reduce the levelized cost of electricity (LCOE) and improve the thermal efficiency of the GTCC system. However, the volatility of solar energy usually results in low ISCC system thermal efficiency when no or low direct normal irradiance (DNI) is available because the ISCC system is usually not equipped with thermal energy storage system. In this paper, the ISCC system with a new operation strategy of changeable integration mode under different DNI conditions is proposed. The ISCC system model is constructed using the EBSILON software. Performance of ISCC system using the new operation strategy is investigated deeply. The results show that the ISCC system using the new operation strategy has higher annual solar to electricity efficiency (19.08%), 1.1% higher than that of the traditional ISCC system. Due to different DNI distributions in a whole year, the larger the distribution proportion of the low‐value DNI is, the greater the thermodynamic performance advantage of ISCC system with the optimization strategy is. Through the economic performance analysis, the LCOE of the ISCC system with the new optimization strategy is 0.223 $/kW·h, 0.01 $/kW·h lower than that of the traditional ISCC system. The LCOE decreases at first and then increases with the increase of the number of the parabolic trough collector. The optimal number of the parabolic trough collector corresponding to the new optimization strategy is 500. So this new operation strategy provides a new way for adequately utilizing the solar energy in ISCC system.

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Performance Study of a Novel Integrated Solar Combined Cycle System

Cited by 10 publications

References 24 publications

Performance improvement of cogeneration plants in hot arid regions via sustainable turbine inlet air cooling technologies: An energy‐water nexus comparative case study

Performance improvement of cogeneration plants in hot arid regions via sustainable turbine inlet air cooling technologies: An energy‐water nexus comparative case study

Analysis of Driving Factors of Photovoltaic Power Generation Efficiency: A Case Study in China

Study on integrated solar combined cycle system with a new operation strategy of changeable integration mode under different Direct Normal Irradiance (DNI) conditions

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