Exergy analysis of DSG parabolic trough collectors for the optimal integration with a combined cycle

Nezammahalleh, Hassan

doi:10.1504/ijex.2015.067300

Cited by 7 publications

(1 citation statement)

References 23 publications

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“…The exergy analysis is concerned with the quantity and quality of the energy conversion process, and can be used to determine the exergy loss and energy conversion weaknesses of each part of the thermal system [ 36 ].…”

Section: S-co 2 Waste Heat Recovery Performance Ev...mentioning

confidence: 99%

Performance Modulation of S-CO2 Brayton Cycle for Marine Low-Speed Diesel Engine Flue Gas Waste Heat Recovery Based on MOGA

Xie

Yang

2022

Entropy

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(1) Background: the shipping industry forced ships to adopt new energy-saving technologies to improve energy efficiency. With the timing modulation for the marine low-speed diesel engine S-CO2 Brayton cycle, the waste heat recovery system is optimized to improve fuel economy. (2) Methods: with the 6EX340EF marine low-speed diesel engine established in AVL Cruise M and verified by the bench test data, the model of the S-CO2 Recompression Brayton Cycle (SCRBC) system for the low-speed engine flue gas waste heat recovery was developed in EBSILON, and verified by SANDIA experimental data. On this basis, the effects of injection timing and valve timing parameters on the comprehensive performance of the main engine and the waste heat recovery system were investigated. By optimizing the timing modulation parameters through multi-objective genetic algorithm (MOGA) and evaluating the flue gas waste heat recovery from the perspective of thermodynamic performance and emission reduction, the research on the performance modulation method of the S-CO2 Brayton Cycle for flue gas waste heat in marine low-speed engines has been completed. (3) Results: the SCRBC with waste heat modulation will further increase the total power and efficiency, which in turn brings about a reduction in the fuel consumption rate. The efficiency of the SCRBC system with the addition of waste heat modulation increases by 2.28%, 1.04% and 2.07% at 50%, 75% and 100%, respectively. After adding the residual heat modulation, the maximum annual CO2 emission reduction of 748.51 × 103 kg·a−1 occurred at 50% load; with the exergy analysis, the cooler has the largest system exergy loss of 165 kW, with the exergy loss efficiency of 2.06% under 100% load. (4) Conclusions: the research on the performance modulation method of S-CO2 Brayton cycle for flue gas waste heat in the marine low-speed engine has been completed, which further improves the efficiency of the system and can be extended to other engines.

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Section: S-co 2 Waste Heat Recovery Performance Ev...mentioning

confidence: 99%

Performance Modulation of S-CO2 Brayton Cycle for Marine Low-Speed Diesel Engine Flue Gas Waste Heat Recovery Based on MOGA

Xie

Yang

2022

Entropy

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Energy, exergy, and economic analysis of an integrated solar combined cycle power plant

Benabdellah

Ghenaiet

2021

Engineering Reports

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Integrated Solar Combined Cycle (ISCC) power plants based on Parabolic Trough Concentrators (PTCs) are the most efficient way for solar into electrical energy conversion. However, due to operation in several climate conditions, they need more efforts in their adaptation. This paper presents a techno‐economic assessment of an ISCC ‐ PTC system operating at Hassi R'mel site (Algerian Sahara) for which a new thermal storage system is incorporated. The obtained results reveal noticeable enhancements in the solar energy conversion and the overall power plant performance, hence offering better stability to the grid. As shown, the net solar thermal energy conversion ratio may reach up to 14%. Energy and exergy efficiencies are respectively equal to 56.06% and 53.29%, and about 46% of exergy received by the system is destructed. Moreover, the obtained Levelized Cost of Energy (LCOE) is around 9.75 ¢/kWh which is very promising, but still higher compared with a simple Combined Cycle (CC). At this geographical site, the modified ISCC ‐ PTC power plant will allow saving about 30 million $ in natural gas consumption and 13 million $ in emission taxes.

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Exergic Analysis of an ISCC System for Power Generation and Refrigeration

Wang

Lin

et al. 2021

Int J Thermophys

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Exergy analysis of DSG parabolic trough collectors for the optimal integration with a combined cycle

Cited by 7 publications

References 23 publications

Performance Modulation of S-CO2 Brayton Cycle for Marine Low-Speed Diesel Engine Flue Gas Waste Heat Recovery Based on MOGA

Performance Modulation of S-CO2 Brayton Cycle for Marine Low-Speed Diesel Engine Flue Gas Waste Heat Recovery Based on MOGA

Energy, exergy, and economic analysis of an integrated solar combined cycle power plant

Exergic Analysis of an ISCC System for Power Generation and Refrigeration

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