Advanced exergy and exergoeconomic analysis of a novel liquid carbon dioxide energy storage system

Liu, Zhan; Liu, Zihui; Yang, Xuqing; Zhai, Huamin; Yang, Xiaohu

doi:10.1016/j.enconman.2019.112391

Cited by 88 publications

(19 citation statements)

References 41 publications

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“…In the same way, when a carbon dioxide energy conversion process is operating above its critical conditions, the fluid density is increased to achieve the benefit of a low volume/power ratio, i.e. the compression work performed in the compressor in the S-CO 2 decreases significantly due to the change of the CO 2 thermal properties, observing a compressibility factor of the fluid from 0.2 to 0.5 [ 11 ]. Therefore, its integration with an ORC cycle with low acquisition costs operating in optimal operating conditions could guarantee values of thermo-economic indicators such as the specific cost of investment, which enable its application in real operating conditions at an industrial level.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of the energy, exergetic and thermo-economic performance of a novelty combined Brayton S-CO2-ORC configurations as bottoming cycles

Gutiérrez

Ochoa

Forero

2020

Heliyon

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This paper presents a comparative study on the energy, exergetic and thermo-economic performance of a novelty thermal power system integrated by a supercritical CO 2 Brayton cycle, and a recuperative organic Rankine cycle (RORC) or a simple organic Rankine cycle (SORC). A thermodynamic model was developed applying the mass, energy and exergy balances to all the equipment, allowing to calculate the exergy destruction in the components. In addition, a sensitivity analysis allowed studying the effect of the primary turbine inlet temperature (T IT, P HIGH , r P and T C ) on the net power generated, the thermal and exergy efficiency, and some thermo-economic indicators such as the payback period (PBP), the specific investment cost (SIC), and the levelized cost of energy (LCOE), when cyclohexane, acetone and toluene are used as working fluids in the bottoming organic Rankine cycle. The parametric study results show that cyclohexane is the organic fluid that presents the best thermo-economic performance, and the optimization with the PSO method conclude a 2308.91 USD/kWh in the SIC, 0.22 USD/kWh in the LCOE, and 9.89 year in the PBP for the RORC system. Therefore, to obtain technical and economic viability, and increase the industrial applications of these thermal systems, thermo-economic optimizations must be proposed to obtain lower values of the evaluated performance indicators.

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Section: Introductionmentioning

confidence: 99%

A comparative study of the energy, exergetic and thermo-economic performance of a novelty combined Brayton S-CO2-ORC configurations as bottoming cycles

Gutiérrez

Ochoa

Forero

2020

Heliyon

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“…Latent heat thermal energy storage system (LHTES) has attracted considerable attention since it has many superiorities, including high thermal energy storage density, low cost, system robustness, and relatively constant temperature during heat charging and discharging 1‐3 . LHTES has shown great potential in a wide span of thermal applications, such as heat storage in buildings, 4‐6 concentrating solar power, 7‐9 solar energy storage, 10‐12 waste heat recovery, 13‐15 cooling of electronic devices, 16‐18 ice‐storage air‐conditioning, 19‐21 and liquid carbon dioxide energy storage system 22‐24 …”

Section: Introductionmentioning

confidence: 99%

Thermal performance assessment of a thermal energy storage tank: effect of aspect ratio and tilted angle

et al. 2021

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Summary Latent heat thermal energy storage is essential for a broad range of multidisciplinary thermal applications, due to its capability of keeping a relative constant temperature during thermal energy storage/release. The aspect ratio (AR) and installation angle (tilted angle) for a latent heat energy storage tank play important roles in addressing the issue of thermal energy storage/release efficiency. In this work, the coupled effects of tank aspect ratio and tilted angle upon melting phase change were both experimentally and numerically investigated. Wide range of tank aspect ratios from 0.1 to 8.0 was studied with respect to four representative tilted angles (0°, 30°, 60°, and 90°). The detailed features of melting front propagation, temperature distribution, and free convection development in the melt phase were quantified. Results indicated that melting heat transfer was markedly affected by the tilted angle, regardless of tank aspect ratio. However, the fastest melting occurred at different tilted angles, if different tank aspect ratios were considered. With AR < 1.0, the highest melting rate was found at 0° inclination. As for AR > 2.0, the fastest melting was achieved at an inclination of 60°.

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“…They analysed in detail, the similarities and differences of the results obtained from the two methods, and concluded that advanced exergoeconomic analysis gives better understanding of optimization potentials in the system. Liu, Liu, Yang, Zhai, and Yang [21] presented a comprehensive advanced exergoeconomic analysis of a 10 MW supercritical Brayton cycle plant running on carbon dioxide and integrated with energy storage device. The analysis identified expander as the component with the highest potential for system improvement, an information that was reportedly suppressed when conventional exergoeconomic method was applied to the same system.…”

Section: Introductionmentioning

confidence: 99%

Modified auxiliary exergy costing in advanced exergoeconomic analysis applied to a hybrid solar-biomass organic Rankine cycle plant

2020

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This study concerns advanced exergoeconomic analysis of a hybrid solar-biomass organic Rankine cycle (ORC) cogeneration plant. The hybrid plant had been previously conceived as structural optimization scheme to upgrade thermo-economic performance of a real 630 kW solar-ORC plant which currently runs in Ottana, Italy. The irreversibility rates, investment cost rates and irreversibility cost rates were obtained for each system component, based on thermodynamic balance as well as cost balance and auxiliary equations established for the components. Next, the avoidable/unavoidable and exogenous/endogenous splitting options were applied to investigate the sources of thermo-economic losses in the system, the effects of component interactions on the losses, as well as the best approach to improving the system. The main contribution of this paper centers on modification of the traditional auxiliary exergy costing in advanced exergoeconomic methodology, by incorporating stream energy quality into the cost formation process. Results showed that more than 50 % of total irreversibility rates can be avoided in almost all of the components of the hybrid plant, most of which are endogenous. Similarly, it was obtained that component interdependencies have little impact on thermo-economic losses. Specifically, more than 60 % of irreversibility cost rates could be avoidable in the hybrid plant by optimizing internal operations of each of the system components individually. Moreover, results showed that how auxiliary exergy costing is defined in advanced exergoeconomic method plays a significant role on the analysis, and the modified approach presented in this study is a viable choice.

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Advanced exergy and exergoeconomic analysis of a novel liquid carbon dioxide energy storage system

Cited by 88 publications

References 41 publications

A comparative study of the energy, exergetic and thermo-economic performance of a novelty combined Brayton S-CO2-ORC configurations as bottoming cycles

A comparative study of the energy, exergetic and thermo-economic performance of a novelty combined Brayton S-CO2-ORC configurations as bottoming cycles

Thermal performance assessment of a thermal energy storage tank: effect of aspect ratio and tilted angle

Modified auxiliary exergy costing in advanced exergoeconomic analysis applied to a hybrid solar-biomass organic Rankine cycle plant

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