Heat exchanger modelling in central receiver solar power plant using dense particle suspension

Reyes-Belmonte, Miguel A.; Gómez-García, Fabrisio; González-Aguilar, José; Romero, Manuel; Benoit, Hadrien; Flamant, Gilles

doi:10.1063/1.4984385

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…Despite dedicated design of the heat exchanger, using particles as intermediate energy storage system is translated into temperature reduction around 50 ºC between air leaving the heat exchanger network during tanks discharging and solar receiver outlet temperature. That temperature drop was calculated using heat exchanger mathematical model 4 .…”

Section: Particles-based Tes Systemmentioning

confidence: 99%

Application of un-fired closed Brayton cycle with mass flow regulation and particles-based thermal energy storage systems for CSP

Rovense

Reyes-Belmonte

González-Aguilar

et al. 2019

AIP Conference Proceedings

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In this work it is evaluated the performance of regenerative closed Brayton power cycle for Concentrating Solar Power (CSP) applications. Power plant components and operation control strategy have been designed in order to fully cover electricity demand of the grid to which it is connected in Sicily (Italy). Results analysis is proving that pure solar Brayton cycle can follow electricity demand curve during most of the day through base pressure and mass flow regulation of the closed-loop and the introduction of particles-based Thermal Energy Storage (TES) system between solar receiver and turbine. Operation flexibility and non-expensive price of the working fluid (air) and storage medium (particles) make this concept very attractive for CSP applications. Detail analysis of the results is showing that the selected 20-MW power block can produce around 42 GWh per year, and when TES is included the power plant operation will increase from 3393 hours to 4640 hours, which represents an increase of 53 % working time.

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Section: Particles-based Tes Systemmentioning

confidence: 99%

Application of un-fired closed Brayton cycle with mass flow regulation and particles-based thermal energy storage systems for CSP

Rovense

Reyes-Belmonte

González-Aguilar

et al. 2019

AIP Conference Proceedings

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“…Furthermore, neither temperature restrictions nor phase change are limiting factors for this application and therefore higher efficiency can be pursued for the power block. This concept allows introducing very efficient power blocks (combined cycle, supercritical steam or sCO 2 ) for CSP applications 12,13 as well as moving towards cheaper HTF for solar receivers as for example air. In addition, extra level of freedom can be achieved by decoupling the solar loop and power conversion which simplifies the operation of the power cycle while mitigating the effect of transient weather conditions.…”

Section: Solar Plant Descriptionmentioning

confidence: 99%

Particles-based thermal energy storage systems for concentrated solar power

Reyes-Belmonte

Díaz

Romero

et al. 2018

AIP Conference Proceedings

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In this paper, particles-based thermal energy storage (TES) system for concentrated solar power (CSP) is presented and applied to different CSP plant-layout scenarios. The key-component of this system is the fluidized-bed heat exchanger (DPS-HX) that is used for coupling particles-based storage system to the solar loop and to the power block. Mathematical model is used for the design and thermal performance analysis of the heat exchanger coupled to subcritical and supercritical Rankine steam cycles for small and commercial plant sizes. Among the benefits of particles-based thermal energy storage it can be pointed out no temperature restrictions with no freezing nor temperature degradation, ease of handling and no toxicity. It has been found that particles heat exchanger operates at high efficiency (from 91% to 99% for most of cases) and that power consumption for fluidization purposes are negligible compared to thermal power transferred to the work transfer fluid. For large power plant size, it is preferred distributing particles among different heat exchangers connected in parallel instead of passing whole particles and work transfer fluid through just one heat exchanger component.

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“…Besides, they can constitute inexpensive direct storage and can also be used to produce thermochemical reactions and process heat [24]. Specifically, in dense particle suspension (DPS) receivers, particles are forced to ascend through the receiver tubes and then the heated particles are stored and recirculated using fluidized bed systems [25,26,27,28,29,30].…”

Section: Introductionmentioning

confidence: 99%

Exergy recovery from solar heated particles to supercritical CO2

Hernández-Jiménez

Soria-Verdugo

Acosta-Iborra

et al. 2019

Applied Thermal Engineering

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In this work, the technical feasibility of a fluidized and a fixed bed heat exchanger in a concentrating solar power (CSP) tower for heat recovery applications is analysed using Two-Fluid Model simulations. The heat recovery process analysed in this work corresponds to the discharge of sensible heat from solid particles.In the cases studied, the fluidizing agent of the bed is carbon dioxide (CO 2 ) in supercritical conditions and the particles, which constitute the bed material, are sensible heat storage material. CO 2 is gaining attention in its application as a working fluid in thermodynamic cycles for power generation, especially in transcritical and supercritical conditions due to its high density and excellent heat transfer characteristics. Currently, research is focused on exploring the CO 2 capabilities when used in combination with CSP technologies, together with systems that allow the storage and recovery of the solar thermal energy.Fixed or fluidized beds work as a direct contact heat exchanger between the particles and the working fluid that percolates through the bed material. Several bed configurations are presented to derive the optimal configuration of the bed that enhances the efficiency from both the energetic and the exergetic points of view. The results indicate that a fixed bed heat exchanger produces a maximum increase of availability in the CO 2 flow during longer times than a fluidized bed heat exchanger. Therefore, to maximise the exergy recovery from solar heated particles to supercritical CO 2 a fixed bed heat exchanger is more suitable than a fluidized bed heat exchanger.

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Heat exchanger modelling in central receiver solar power plant using dense particle suspension

Cited by 6 publications

References 9 publications

Application of un-fired closed Brayton cycle with mass flow regulation and particles-based thermal energy storage systems for CSP

Application of un-fired closed Brayton cycle with mass flow regulation and particles-based thermal energy storage systems for CSP

Particles-based thermal energy storage systems for concentrated solar power

Exergy recovery from solar heated particles to supercritical CO2

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