Dynamic simulation of integrated rock-bed thermocline storage for concentrated solar power

Mertens, Nicolas; Alobaid, Falah; Frigge, Lorenz; Epple, Bernd

doi:10.1016/j.solener.2014.10.021

Cited by 79 publications

(31 citation statements)

References 36 publications

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“…For the high grade cold thermal storage (HGCS) we adopted a one-dimensional approach to model heat transfer within the packed bed. Energy equations for both solid bed and air were used under the assumption of uniform flow distribution [24,25]:…”

Section: Packed Bed Cold Thermal Storage (Hgcs)mentioning

confidence: 99%

Liquid air energy storage (LAES) with packed bed cold thermal storage – From component to system level performance through dynamic modelling

2017

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Link to publication on Research at Birmingham portal General rights Unless a licence is specified above, all rights (including copyright and moral rights) in this document are retained by the authors and/or the copyright holders. The express permission of the copyright holder must be obtained for any use of this material other than for purposes permitted by law. • Users may freely distribute the URL that is used to identify this publication. • Users may download and/or print one copy of the publication from the University of Birmingham research portal for the purpose of private study or non-commercial research. • User may use extracts from the document in line with the concept of 'fair dealing' under the Copyright, Designs and Patents Act 1988 (?) • Users may not further distribute the material nor use it for the purposes of commercial gain. Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

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Section: Packed Bed Cold Thermal Storage (Hgcs)mentioning

confidence: 99%

Liquid air energy storage (LAES) with packed bed cold thermal storage – From component to system level performance through dynamic modelling

2017

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“…Two concurrent cutoff criteria are considered for this study. The first cutoff criterion is based on the HTF outlet temperature with cutoff temperature, T cutoff ¼ 480 C. The temperature cutoff value is based on the requirement that the moisture content of steam at the exhaust of a steam turbine must not exceed 10%, and an analysis using a simple ideal Rankine steam cycle demonstrates that 480°C is an agreeable cutoff temperature for a system of this storage capacity [26]. The second cutoff criterion is based on the exergetic efficiency of thermal discharging.…”

Section: Parametric Study For Single Dischargementioning

confidence: 99%

“…For conventional shell and tube style TES geometries, we propose the use of intermodal shipping containers in TES systems due to their standard sizing and use in global transport of products, which forms the subject of investigation in the present study. Previous studies using air as HTF have been conducted using packed bed systems [24][25][26][27]. For this study, air is considered as HTF due to its inexpensive material cost in comparison to conventional molten salt HTF, the increased focus on the development of air-Brayton engines for power cycles [28], and the development of volumetric receiver technologies for use in next generation central receiver systems in CSP plants [29].…”

Section: Introductionmentioning

confidence: 99%

Sulfur-based thermal energy storage system using intermodal containment: Design and performance analysis

Shinn

Nithyanandam

Barde

et al. 2018

Applied Thermal Engineering

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h i g h l i g h t sElemental sulfur is a promising low-cost candidate for thermal energy storage. Transient performance of sulfur-based shell and tube thermal battery is investigated. Results show preferred designs that provide high exergetic efficiency and low system cost. a b s t r a c tThermal energy storage (TES) is an important energy storage technology that can be coupled to intermittent energy sources to improve system dispatchability. Elemental sulfur is a promising candidate storage fluid for high temperature TES systems due to its high energy density, moderate vapor pressure, high thermal stability, and low cost. This study uses a transient, two-dimensional numerical model to investigate the design and performance of a thermal energy storage (TES) system that uses sulfur stored isochorically in an intermodal shell and tube thermal battery configuration. Parametric analyses of key design and operating parameters show that there is a preferred tube diameter based on the competing influence of system-level energy storage utilization, exergetic efficiency, and cost. The results show that designs with smaller tube dimensions in the range of 2 00 NPS to 4 00 NPS provide exergetic efficiencies close to 95% while tube dimensions in the range of 4 00 NPS to 8 00 NPS meet the Department of Energy cost target of $15/kWh with costs being as low as $8.41/kWh. Finally, a table of preferred designs that meet the DOE cost goals is presented to help guide future design and experimentation efforts.

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“…Similarly, N. Mertens et al assessed the suitability of a quartzite rock randomly packed bed with air as the HTF to work in conjunction with a semi-industrial scale solar power plant. Their results indicate economical and cost saving advantages, however with reduced the plant efficiency [8]. R. Lugolole et al suggests granite pebbles as the filler for an experimental packed bed setup in which the HTF is sunflower oil.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modelling of Low Grade Thermal Energy Storage Using an Encapsulated Liquid Medium

Sevilla

Radulovic

2020

Journal of Thermal Engineering

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In the present study, we report the results obtained from numerical simulations of low grade heat storage. Four different fluid encapsulated materials were tested in four design types for their suitability as a small scale, low temperature thermal energy storage (TES). This was done by analysing and evaluating the maximum temperature reached per sphere for three different positions inside the tank, which correspond to the top right, centre and bottom right sphere. The influences of the material properties and the inlet/outlet tank designs were analysed and evaluated based on the results. The heat transfer fluid (HTF) was water and the storage materials selected were water, glycerol, MDM and MD3M. These were heated sensibly from an ambient temperature of 20°C to 90°C. The analysis shows that the materials with the highest relevant properties do not in fact charge the tank the fastest. Furthermore, the design of the inlet greatly affects the heating dynamics of the system, whereas changing the outlet design marginally affects the results.

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Dynamic simulation of integrated rock-bed thermocline storage for concentrated solar power

Cited by 79 publications

References 36 publications

Liquid air energy storage (LAES) with packed bed cold thermal storage – From component to system level performance through dynamic modelling

Liquid air energy storage (LAES) with packed bed cold thermal storage – From component to system level performance through dynamic modelling

Sulfur-based thermal energy storage system using intermodal containment: Design and performance analysis

Mathematical Modelling of Low Grade Thermal Energy Storage Using an Encapsulated Liquid Medium

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