Mainstreaming commercial CSP systems: A technology review

Fernández, Ángel G.; Vidal, Judith; Oró, Eduard; Kruizenga, Alan Michael; Solé, Aran; Cabeza, Luisa F.

doi:10.1016/j.renene.2019.03.049

Cited by 207 publications

(76 citation statements)

References 100 publications

(129 reference statements)

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“…As shown in Figure 6, the Brayton cycle is similar to the system used for charging the recuperated Brayton PTES variant shown in Figure 5, except for the cold storage, which is not required. Instead, heat from the environment is used to heat the working fluid between the exit of the turbine and the inlet of the recuperator (5)(6). Alternatively, stored heat released during the discharge process (B 2 -D) can be used.…”

Section: Brayton Rankinementioning

confidence: 99%

“…After the internal heat transfer, CO 2 expands in the turbine (4)(5). Heat from an ice storage is used to evaporate the CO 2 (5)(6).…”

Section: Comentioning

confidence: 99%

“…In power plants, thermal storage units have been considered to support the steam generator to improve the flexibility. In recent years, there has been a significant advancement of thermal storage technology in the area of concentrating solar power (CSP), where large storage units with storage capacities up to 1.5 GWh el are used to store surplus heat delivered by solar collectors . The stored heat is used to operate a Rankine cycle following the demand.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Analysis of High‐Temperature Carnot Battery Concepts

2019

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Within the thermal energy storage initiative, National Demonstrator for IseNtropic Energy (NADINE) storage, three projects are carried out focusing on thermal energy storage at different temperature levels. Thermal storage units are key components of Carnot batteries, which are based on the intermediate conversion of electric energy into heat. Pumped thermal energy storage (PTES) is an emerging Carnot battery concept variant for the flexible management of supply and demand of electricity, heat, and cold. A counterclockwise thermodynamic cycle operated by surplus electricity is used to charge a thermal storage, which delivers heat to operate a power cycle during discharge. The absence of geographic constraints, a theoretical roundtrip efficiency of 100%, and a small environmental footprint are promising features of PTES. PTES is also able to provide low‐cost backup capacity in case of shortages in available renewable energy. Various options are proposed for the technical implementation of PTES, using various combinations of engines, thermal storage units, and working fluids. The resulting systems differ in efficiency, costs, maturity, and complexity. Herein, a thermodynamic analysis of five different PTES variants is presented. The results should help to identify priorities in the further development of the PTES variants.

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Section: Brayton Rankinementioning

confidence: 99%

“…After the internal heat transfer, CO 2 expands in the turbine (4)(5). Heat from an ice storage is used to evaporate the CO 2 (5)(6).…”

Section: Comentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Analysis of High‐Temperature Carnot Battery Concepts

2019

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“…Moreover, heat input is determined by the power block and the thermodynamic power cycle efficiency, which gives Equation (2). Meanwhile, the HFT system cannot be connected to a TES system if the HFT does not provide a higher output temperature than the allowable minimum temperature, and thus heat is not transferred to storage [37][38][39]. To guarantee the feasibility of the TES system, the following constraints should be satisfied:…”

Section: Solar Fieldsmentioning

confidence: 99%

Day-Ahead Robust Economic Dispatch Considering Renewable Energy and Concentrated Solar Power Plants

et al. 2019

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A concentrated solar power (CSP) plant with energy storage systems has excellent scheduling flexibility and superiority to traditional thermal power generation systems. In this paper, the operation mechanism and operational constraints of the CSP plant are specified. Furthermore, the uncertainty of the solar energy received by the solar field is considered and a robust economic dispatch model with CSP plants and renewable energy resources is proposed, where uncertainty is adjusted by the automatic generation control (AGC) regulation in the day-ahead ancillary market, so that the system security is guaranteed under any realization of the uncertainty. Finally, the proposed robust economic dispatch has been studied on an improved IEEE 30-bus test system, and the results verify the proposed model.

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“…Recent studies indicate that renewable energy, including concentrating solar power (CSP) technologies, could play a significant role in the forthcoming development [4][5][6]. CSP technologies use solar concentrators to produce high-temperature heat to drive a turbine power cycle that generates electrical power [7,8]. Parabolic trough concentrator (PTC) technology can be considered as the most advanced and commercially proven technology for CSP plants [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance Analysis of a Direct-Heated Recompression Supercritical Carbon Dioxide Brayton Cycle Using Solar Concentrators

Wang

Lund

et al. 2019

Energies

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In this study, a direct recompression supercritical CO2 Brayton cycle, using parabolic trough solar concentrators (PTC), is developed and analyzed employing a new simulation model. The effects of variations in operating conditions and parameters on the performance of the s-CO2 Brayton cycle are investigated, also under varying weather conditions. The results indicate that the efficiency of the s-CO2 Brayton cycle is mainly affected by the compressor outlet pressure, turbine inlet temperature and cooling temperature: Increasing the turbine inlet pressure reduces the efficiency of the cycle and also requires changing the split fraction, where increasing the turbine inlet temperature increases the efficiency, but has a very small effect on the split fraction. At the critical cooling temperature point (31.25 °C), the cycle efficiency reaches a maximum value of 0.4, but drops after this point. In optimal conditions, a cycle efficiency well above 0.4 is possible. The maximum system efficiency with the PTCs remains slightly below this value as the performance of the whole system is also affected by the solar tracking method used, the season and the incidence angle of the solar beam radiation which directly affects the efficiency of the concentrator. The choice of the tracking mode causes major temporal variations in the output of the cycle, which emphasis the role of an integrated TES with the s-CO2 Brayton cycle to provide dispatchable power.

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Mainstreaming commercial CSP systems: A technology review

Cited by 207 publications

References 100 publications

Thermodynamic Analysis of High‐Temperature Carnot Battery Concepts

Thermodynamic Analysis of High‐Temperature Carnot Battery Concepts

Day-Ahead Robust Economic Dispatch Considering Renewable Energy and Concentrated Solar Power Plants

Thermal Performance Analysis of a Direct-Heated Recompression Supercritical Carbon Dioxide Brayton Cycle Using Solar Concentrators

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