Performance analysis of a CCHP system based on SOFC/GT/CO2 cycle and ORC with LNG cold energy utilization

Liu, Yang; Han, Jisheng; You, Huailiang

doi:10.1016/j.ijhydene.2019.02.201

Cited by 130 publications

(28 citation statements)

References 26 publications

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“…The overall electrical efficiency (η ele ), heating efficiency (η heat ), CHP efficiency (η CHP ), and exergy efficiency (η Ex,tot ) are 67.01%, 12.49%, 79.50%, and 65.49%, respectively. Thereinto, η ele is about 5% higher than that of the SOFC-SCO 2 system proposed by Sánchez et al 17 Besides, compared with the extremely complex CCHP system integrated with the SOFC-GT system, ORC, CO 2 simple cycle, and LNG, 15 the proposed CHP has a higher comprehensive energy utilization rate and exergy efficiency with a relatively simple layout. The simulation results of each node in the SOFC system and SCO 2 cycle are shown in Tables 3 and 4, respectively.…”

Section: Simulation Resultsmentioning

confidence: 79%

“…Chen et al 14 combined SOFC‐GT with a recompression SCO 2 cycle for power generation, and the thermodynamic and exergoeconomic performance were investigated. Liu et al 15 integrated the SOFC‐GT with ORC, CO 2 simple cycle, and LNG to form a CCHP system. While the system had high efficiency, the combination of lots of components and multiple systems made the system highly integrated and extremely complex.…”

Section: Introductionmentioning

confidence: 99%

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Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO₂partial preheating cycle

et al. 2020

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Summary The paper proposes a novel combined heating and power (CHP) system integrated with solid oxide fuel cell (SOFC) and supercritical CO2 (SCO2) partial preheating cycle to improve the energy utilization rate by employing the SCO2 cycle to recover the waste heat from the SOFC. The SCO2 partial preheating cycle can not only improve the net output power but also preheat the air supplied to the SOFC for enhancing the system efficiency. Sensitivity analysis is implemented to study the influences of six key parameters (ie, fuel flow rate, excess air ratio, fuel utilization factor, CO2 turbine inlet temperature, CO2 compressor pressure ratio, and CO2 split ratio) on the proposed system in terms of thermodynamic behaviors. And then the optimal operating conditions for the different objectives are determined by parametric optimization. The results indicate that the optimal overall electrical efficiency and CHP efficiency of the proposed system are 72.84% and 83.83% respectively, while the exergy efficiency can achieve 70.84%. Furthermore, the best trade‐off result is obtained with the energy output of 434.71 kW and the exergy efficiency of 64.28%. Finally, the investigation demonstrates the fuel flow rate is the most sensitive parameter which should be determined with the comprehensive consideration of the efficiency and energy output, and the lower excess air ratio and higher CO2 turbine inlet temperature are preferred for power generation.

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Section: Simulation Resultsmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO₂partial preheating cycle

et al. 2020

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“…Through the component stack, the net power output of the SOFC system can be calculated as [30][31][32]:…”

Section: Parameters Valuementioning

confidence: 99%

Thermal Evaluation of a Novel Integrated System Based on Solid Oxide Fuel Cells and Combined Heat and Power Production Using Ammonia as Fuel

Duong

Ryu

Jung³

et al. 2022

Applied Sciences

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A novel integrated system based on solid oxide fuel cells (SOFCs), a gas turbine (GT), the steam Rankine cycle (SRC), the Kalina cycle (KC), and the organic Rankine cycle (ORC) is proposed to achieve cascade energy utilization. Mathematical models are introduced and system performance is analyzed using energy and exergy methods. The first and second laws of thermodynamics are used to analyze the system thermodynamically. In addition, exergy destruction and losses of the various integrated subsystems are calculated. The energy and exergy efficiencies of the multigeneration system are estimated to be 60.4% and 57.3%, respectively. In addition, the hot water produced during the waste heat recovery process may also be used for accommodating seafarers on ships. Sequential optimization is developed to optimize the operating conditions of the integrated system to achieve the required power output. A comprehensive parametric study is conducted to investigate the effect of varying the current densities of the fuel cell and working fluid of the ORC on the overall performance of the combined system and subsystems. The working performance of five working fluids for the ORC as candidates—R134a, R600, R601, R152a, and R124—is compared. R152a, which provides 71.23 kW of power output, and energy and exergy efficiencies of 22.49% and 42.76%, respectively, is selected as the best thermodynamic performance for the ORC.

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“…An example of micro cogeneration system based on an SOFC fuel cell is presented in Figure 45. Due to the high operating temperature (800-1000 • C), SOFC fuel cells can also be combined into systems with other energy sources, such as gas turbines [222][223][224][225][226][227][228][229] and burners [230][231][232][233][234][235]. An example of an SOFC fuel cell coupled to a gas turbine can be seen in Figure 46, while an SOFC fuel cell coupled to an additional heat source in Figure 47.…”

Section: Fuel Cellsmentioning

confidence: 99%

Modern Small and Microcogeneration Systems—A Review

2021

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Small and micro energy sources are becoming increasingly important in the current environmental conditions. Especially, the production of electricity and heat in so-called cogeneration systems allows for significant primary energy savings thanks to their high generation efficiency (up to 90%). This article provides an overview of the currently used and developed technologies applied in small and micro cogeneration systems i.e., Stirling engines, gas and steam microturbines, various types of volumetric expanders (vane, lobe, screw, piston, Wankel, gerotor) and fuel cells. Their basic features, power ranges and examples of implemented installations based on these technologies are presented in this paper.

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Performance analysis of a CCHP system based on SOFC/GT/CO2 cycle and ORC with LNG cold energy utilization

Cited by 130 publications

References 26 publications

Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO₂partial preheating cycle

Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO₂partial preheating cycle

Thermal Evaluation of a Novel Integrated System Based on Solid Oxide Fuel Cells and Combined Heat and Power Production Using Ammonia as Fuel

Modern Small and Microcogeneration Systems—A Review

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Performance analysis of a CCHP system based on SOFC/GT/CO2 cycle and ORC with LNG cold energy utilization

Cited by 130 publications

References 26 publications

Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO2partial preheating cycle

Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO2partial preheating cycle

Thermal Evaluation of a Novel Integrated System Based on Solid Oxide Fuel Cells and Combined Heat and Power Production Using Ammonia as Fuel

Modern Small and Microcogeneration Systems—A Review

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Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO₂partial preheating cycle

Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO₂partial preheating cycle