Optimal design and operation of an Organic Rankine Cycle (ORC) system driven by solar energy with sensible thermal energy storage

Yu, Haoshui; Helland, Henrik; Yu, Xingji; Gundersen, Truls; Sin, Gürkan

doi:10.1016/j.enconman.2021.114494

Cited by 104 publications

(14 citation statements)

References 31 publications

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“…Solar ORCs with thermal storage unit have been optimized by considering different objective functions; for instance, Yu et al (2021) optimized a solar ORC with and without recuperator as shown in Figure 5 by considering the overall efficiency of the cycle as the objective function. In their study, the decision variables of the optimization were temperatures of the hot and cold tanks, evaporation pressure, operating fluid mass flow rate, heat load of the recuperator, and cold tank temperature (recuperative ORC).…”

Section: Thermal Storage Units In Solar Orcsmentioning

confidence: 99%

Applications of Thermal Energy Storage in Solar Organic Rankine Cycles: A Comprehensive Review

et al. 2021

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Organic Rankine Cycles (ORCs) are promising approaches for generating power from medium or low temperature heat sources. In this regard, ORCs can be used to indirectly produce power from solar energy. Due to intermittent nature of solar energy, storage unit should be coupled with solar ORCs to improve the output power and operating hours. In this article, studies on solar ORCs integrated with various types of storage units were reviewed; the main findings of such studies were extracted and provided. Based on the findings, several factors such as the temperature and pressure at the inlet of the turbine, as well as the operating condition affect the performance of solar ORCs with thermal storage unit just like the conventional ORCs. In addition, the optimum size of the storage unit in the solar ORCs was found to depend on the operating condition. From the financial perspective, it can be noted that the storage unit affects the corresponding indicators. Moreover, the improvement rate in the ORCs by applying storage units could be affected by the configuration of the system.

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Section: Thermal Storage Units In Solar Orcsmentioning

confidence: 99%

Applications of Thermal Energy Storage in Solar Organic Rankine Cycles: A Comprehensive Review

et al. 2021

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“…This is because of low boiling point and low vaporization enthalpy of organic fluids that provide a suitable match for power cycles operating in low to medium temperatures (

60 \mbox{-} 350\mathrm{^\circ C}

) 4,5 . The optimal design of ORC powered by PTSC was investigated by Yu et al 6 for various ORC configurations. Results indicated that recuperative ORC outperforms the basic ORC.…”

Section: Introductionmentioning

confidence: 99%

Energetic/exergetic study of Kalina and refrigeration bottoming cycles on different solar‐driven organic Rankine cycles

Dehghan,

Akbari,

Montazerin

et al. 2024

Energy Science & Engineering

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Combination of different power cycle scenarios is of prime importance in achieving maximum energy utilization from solar‐driven multigeneration systems. To fulfill such objective, the present article proposes a novel energy distribution system, leveraging a combination of direct‐fed organic Rankine cycle (ORC) and a bottom‐cycled arrangement of Kalina cycle system (KCS) and double‐effect absorption refrigeration cycle (DEARC) within a parabolic trough solar collector powered trigeneration system. The study explores three different ORC configurations: simple ORC; ORC equipped with internal heat exchanger (ORC‐IHE) and regenerative ORC (RORC). It is shown that although higher efficiencies are achievable from a larger portion of PTSC energy absorbed by the ORC, the ORC energy absorption is limited by ORC evaporator temperature differences, and there is unused energy that can be recovered by the KCS, based on the proposed energy system. The results indicate that the addition of bottoming KCS leads to a considerable increase in the exergy efficiency of ORC, ORC‐IHE and RORC‐based systems by 11.7%, 30.7% and 32.6%, respectively. The impact of different ORC configurations, key ORC parameters and various organic working fluids on the energetic/exergetic efficiencies is also examined to find the optimal configuration. In terms of overall energetic/exergetic efficiencies, the highest performance belongs to ORC (78.4%/30.4%) while the lowest energetic and exergetic efficiencies belong to ORC‐IHE and RORC, respectively (56.3% and 25.65%). On the basis of a comparative study with the available literature, these values are higher than what is already reported for similar solar‐driven multigeneration systems. Appropriate thermal match and lower exergy destruction in the KCS, and bottoming cycle arrangement of the DEARC are the main reasons for such enhanced performance. This research not only contributes valuable insights into efficient solar‐driven systems but also sets a new benchmark for performance metrics in the existing literature.

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“…The utilization of renewable energy, especially solar energy, is considered to be a feasible way to solve the global warming, ecological degradation, and energy crisis. − Concentrated solar power (CSP) coupled with heat storage systems is regarded as one of the most promising technologies for the large-scale and sustainable utilization of solar energy. , Thermochemical heat storage (TCHS) technologies have been considered as the heat storage system for the next-generation CSP plants because of their wide operating temperature range, high heat storage capacities, and low heat loss. , CaCO 3 /CaO TCHS achieves the effective storage and release of solar energy through the calcium looping (CaL) (i.e., the reversible reactions of CaCO 3 calcination and CaO carbonation), as displayed in eq . With the advantages of convenient coupling with supercritical CO 2 power cycles, low feedstock prices, high heat storage density (about 3178 MJ/t theoretically), and high operating temperatures (over 800 °C), CaCO 3 /CaO TCHS is believed to be one of the most prospective TCHS technologies. , CaCO 3 ( s ) ↔ CaO ( s ) + CO 2 ( g ) 0.25em ΔH 29 8k = 178 0.25em kJ / mol …”

Section: Introductionmentioning

confidence: 99%

DFT Study of the Cooperative Promotion of MgO and ZnO on CaCO₃/CaO Thermochemical Heat Storage Performance of CaO

Zhang,

Li,

Fang

et al. 2023

Energy Fuels

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CaCO3/CaO thermochemical heat storage is one of the most prospective schemes for large-scale heat storage in the next-generation concentrated solar power plants. MgO and ZnO can cooperatively enhance the heat storage performance of CaO. However, the underlying mechanism for the cooperative promotion of MgO and ZnO on the heat storage performance of CaO remains unidentified. In this work, density functional theory (DFT) calculations were applied to analyze the role of MgO and ZnO in CaCO3/CaO heat storage processes. The thermodynamic properties, structural evolution, and exothermic reactivity of CaO-based materials were studied by DFT. Because of the influence of ZnO on Ca–O bonds, ZnCa3O4 has a lower binding energy than Ca4O4. ZnO enlarges the lattice heat capacity and the phonons average velocity of CaO, thus improving the thermal conductivity. The sintering resistance of M-C is mainly due to the strong interaction of Mgs–Oc, but the interaction of Cac–Os is weak. With the doping of ZnO, the strength of Cac–Os is improved, resulting in a stronger sintering resistance of M-ZC. The exothermic reactivity of CaO is simultaneously affected by the interactions between C and O in CaO and between Ca and O in CO2. MgO–ZnO codoping facilitates the interactions between Ca and O but harms the interactions between C and O. With their combined influence, the Hirshfeld charge transfer of M-ZC for CO2 is −0.5 e, which is 1.39 times that of CaO. Besides, MgO–ZnO-codoped CaO was prepared by the wet-mixing method and had heat storage tests. The experimental results support the result obtained by the DFT calculation. Therefore, the probable mechanism of the cooperative promotion on the CaCO3/CaO heat storage process of CaO resulting from MgO–ZnO codoping was determined.

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Optimal design and operation of an Organic Rankine Cycle (ORC) system driven by solar energy with sensible thermal energy storage

Cited by 104 publications

References 31 publications

Applications of Thermal Energy Storage in Solar Organic Rankine Cycles: A Comprehensive Review

Applications of Thermal Energy Storage in Solar Organic Rankine Cycles: A Comprehensive Review

Energetic/exergetic study of Kalina and refrigeration bottoming cycles on different solar‐driven organic Rankine cycles

DFT Study of the Cooperative Promotion of MgO and ZnO on CaCO₃/CaO Thermochemical Heat Storage Performance of CaO

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Optimal design and operation of an Organic Rankine Cycle (ORC) system driven by solar energy with sensible thermal energy storage

Cited by 104 publications

References 31 publications

Applications of Thermal Energy Storage in Solar Organic Rankine Cycles: A Comprehensive Review

Applications of Thermal Energy Storage in Solar Organic Rankine Cycles: A Comprehensive Review

Energetic/exergetic study of Kalina and refrigeration bottoming cycles on different solar‐driven organic Rankine cycles

DFT Study of the Cooperative Promotion of MgO and ZnO on CaCO3/CaO Thermochemical Heat Storage Performance of CaO

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DFT Study of the Cooperative Promotion of MgO and ZnO on CaCO₃/CaO Thermochemical Heat Storage Performance of CaO