Novel hybrid solar tower-gas turbine combined power cycles using supercritical carbon dioxide bottoming cycles

Mohammadi, Kasra; Ellingwood, Kevin; Powell, Kody M.

doi:10.1016/j.applthermaleng.2020.115588

Cited by 43 publications

(13 citation statements)

References 40 publications

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“…9 Among them, three different methods have higher potential to reduce CO 2 emissions, which are: (a) enhancing the performance of the fossil-fuel-based power systems, (b) integrating and utilizing clean energy sources such as wind, solar photovoltaic, and CSP systems with the available power cycles, 10 and (c) introducing novel power technologies such as the sCO 2 -based power cycles. 11,12 These cycles investigated with waste heat, 13 nuclear energy, 14 and solar energy sources 15 with particular focus on the off-design performance and techno-economic evaluation. The third approach is characterized by high thermal efficiency and the elimination of CO 2 emissions.…”

Section: Methods To Reduce Co 2 Emissionsmentioning

confidence: 99%

Combined direct oxy‐combustion and concentrated solar supercritical carbon dioxide power system—Thermo, exergoeconomic, and quadruple optimization analyses

Sleiti

Al‐Ammari

2022

Intl J of Energy Research

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Summary For the global future energy systems, concentrated solar power (CSP) and direct CO2 capture systems are of the most important key technologies, however, each of these systems has shortcomings. This study addresses the solar intermittency and power control complexity of the CSP systems and the substantial energy penalty of the direct oxy‐combustion (DOC) supercritical carbon dioxide (sCO2) power systems by integrating both systems. Herein, innovative power cycle configurations that integrate the CSP tower system with DOC sCO2 power cycle are introduced. The configurations include two basic cycles for comparison and validation purposes and three integrated cycles. The basic configurations are: an intercooled sCO2 power cycle driven by DOC system (S1), and a stand‐alone basic CSP tower system (S2). The integrated configurations are: CSP/DOC system where the CSP works as a preheater (S3); CSP/DOC system where the CSP works as a reheater (S4); and CSP/DOC system where each system heats part of the working fluid to drive its high‐pressure turbine (S5). The hybrid configurations reduce the fuel and the parasitic power consumptions of the basic DOC systems (S1) and reduce the capital cost associated with the conventional CSP systems (S2) by eliminating the need for thermal storage. Over practical ranges of operational parameters, comprehensive thermoeconomic, exergoeconomic, and optimization analyses for the proposed configurations are performed. Compared to the conventional CSP system, the LCOE of the hybrid system is lower by 50%. Among the hybrid configurations, the energetic and exergetic performances of S4 are the best with the lowest LCOE. According to the optimization analysis, S4 has a thermal efficiency of 55.29% at LCOEs of 7.705¢/kWh. S3, S5, S2, and S1 have thermal efficiencies of 52.90%, 48.72%, 45.56%, and 40.54% at LCOE of 7.970, 8.138, 7.864, and 6.351¢/kWh, respectively.

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Section: Methods To Reduce Co 2 Emissionsmentioning

confidence: 99%

Combined direct oxy‐combustion and concentrated solar supercritical carbon dioxide power system—Thermo, exergoeconomic, and quadruple optimization analyses

Sleiti

Al‐Ammari

2022

Intl J of Energy Research

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“…In both cases the sCO 2 cycle do not include recompression and the maximum temperature is lower than 400 C. Hou et al (2018) carry out the optimization of a combined sCO 2 recompression cycle (T max = 750 ) with a regenerative ORC using a zeotropic mixture fluid. On the other hand, Mohammadi et al (2020) propose a layout for a hybrid CR-GT-sCO 2 solar plant, reaching high maximum temperatures (1000 C). The gas turbine exhaust gases feed two sCO 2 cycles in series: a recompression cycle followed by a sCO 2 partial cooling cycle.…”

Section: Supercritical Co 2 Brayton Cyclementioning

confidence: 99%

Thermodynamic cycles for solar thermal power plants: A review

Muñoz

Rovira

Montes

2021

WIREs Energy & Environment

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Solar thermal power plants for electricity production include, at least, two main systems: the solar field and the power block. Regarding this last one, the particular thermodynamic cycle layout and the working fluid employed, have a decisive influence in the plant performance. In turn, this selection depends on the solar technology employed. Currently, the steam Rankine cycle is the most widespread and commercially available option, usually coupled to a parabolic trough solar field. However, other configurations have been implemented in solar thermal plants worldwide. Most of them are based on other solar technologies also coupled to a steam Rankine cycle, although integrated solar combined cycles have a significant level of implementation. In the first place, power block configurations based on conventional thermodynamic cycles—Rankine, Brayton, and combined Brayton–Rankine—are described. The achievements and challenges of each proposal are highlighted, for example, the benefits involved in hybrid solar source/fossil fuel plants. In the second place, proposals of advanced power block configurations are analyzed, standing out: supercritical CO2 Brayton cycles, advanced organic Rankine cycles, and innovative integrated solar combined cycles. Each of these proposals shows some advantages compared to the conventional layouts in certain power or source temperature ranges and hence they could be considered attractive options in the medium term. At last, a brief review of proposals of solar thermal integration with other renewable heat sources is also included. This article is categorized under: Concentrating Solar Power > Systems and Infrastructure Energy Efficiency > Systems and Infrastructure Energy Research & Innovation > Systems and Infrastructure

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“…This implies that cycles with moderate energy source temperatures (550–750°C) have higher exergy efficiencies than Allam‐based cycles. Further, 4E analyses were conducted on integrated cooling‐heating‐power (CHP) systems where the sCO 2 power block is integrated as a top 38 or bottoming cycle 39 with a focus on freshwater production, 40 hydrogen generation, 41 refrigeration cycle, 42 and waste heat recovery 43 . However, compared to the benefits of these systems, their complexity makes them less attractive for practical applications as their economic feasibility was not confirmed in most of these studies.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive thermoeconomic, exergoeconomic, and optimization analyses of direct oxy‐combustion supercritical CO₂ intercooled and reheated cycles under design and off‐design conditions

Al‐Ammari

Sleiti

2022

Energy Science & Engineering

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This study presents comprehensive energetic, exergetic, exergoeconomic, and economic (4E) performance analyses for four direct oxy-combustion (DOC) supercritical carbon dioxide (sCO 2 ) power cycles at design, off-design, and part-load conditions. These cycles include the dual recuperator cycle (DRC), intercooling cycle (ICC), partial intercooling cycle (PIC), and reheating cycle (RHC). The analyses were conducted at relatively low turbine inlet temperatures (TIT: 550-750°C) with compressor inlet temperature (CIT) varied from 33°C (wet-cooling) to 50°C (dry-cooling). Furthermore, single-and multiobjective optimization analyses were conducted for each cycle. At design conditions (high-pressure of P c,o = 20 MPa, lowpressure of P c,o = 5.4 MPa, TIT = 750°C, CIT = 50°C [dry-cooling]), the PIC has the highest thermal efficiency (47.78%) compared to 38.36% for DRC, 45.71% for ICC, and 44.39% for RHC. At optimized conditions (P c,o = 30 MPa, P c,o = 8 MPa, TIT = 744°C, CIT = 30°C [wet-cooling]), the ICC shows superior energetic performance (52.08%) compared to 47.97% for DRC, 49.20% for PIC, and 48.62% for RHC. At offdesign conditions with a power demand (PD) of 40% of the design load (50 MW), the thermal efficiency is decreased by 21.82% in DRC, 17.71% in ICC, 22.46% in PIC, and 13.60% in RHC. The ICC has the minimum levelized cost of electricity compared to the other cycles with 5.93 ¢/kWh at design conditions (dry-cooling), 5.65 ¢/kWh at optimized conditions (wet-cooling), and 7.2 ¢/kWh at minimum PD (21 MW). Therefore, from an economic point of view, the ICC is recommended as the best power block for a sCO 2 power cycle driven by oxy-combustor at moderate TITs. The study also provides constructive comparisons between the DOC-sCO 2 and indirect (nuclear, solar, and waste heat) sCO 2 power cycle systems and the future research directions.

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Novel hybrid solar tower-gas turbine combined power cycles using supercritical carbon dioxide bottoming cycles

Cited by 43 publications

References 40 publications

Combined direct oxy‐combustion and concentrated solar supercritical carbon dioxide power system—Thermo, exergoeconomic, and quadruple optimization analyses

Combined direct oxy‐combustion and concentrated solar supercritical carbon dioxide power system—Thermo, exergoeconomic, and quadruple optimization analyses

Thermodynamic cycles for solar thermal power plants: A review

Comprehensive thermoeconomic, exergoeconomic, and optimization analyses of direct oxy‐combustion supercritical CO₂ intercooled and reheated cycles under design and off‐design conditions

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Novel hybrid solar tower-gas turbine combined power cycles using supercritical carbon dioxide bottoming cycles

Cited by 43 publications

References 40 publications

Combined direct oxy‐combustion and concentrated solar supercritical carbon dioxide power system—Thermo, exergoeconomic, and quadruple optimization analyses

Combined direct oxy‐combustion and concentrated solar supercritical carbon dioxide power system—Thermo, exergoeconomic, and quadruple optimization analyses

Thermodynamic cycles for solar thermal power plants: A review

Comprehensive thermoeconomic, exergoeconomic, and optimization analyses of direct oxy‐combustion supercritical CO2 intercooled and reheated cycles under design and off‐design conditions

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Product

Resources

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Comprehensive thermoeconomic, exergoeconomic, and optimization analyses of direct oxy‐combustion supercritical CO₂ intercooled and reheated cycles under design and off‐design conditions