Assessment of thermal energy storage options in a sodium-based CSP plant

Niedermeier, Klarissa; Flesch, Jonathan; Marocco, Luca; Wetzel, Thomas

doi:10.1016/j.applthermaleng.2016.06.152

Cited by 54 publications

(24 citation statements)

References 55 publications

(104 reference statements)

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“…Considering the relatively low specific volumetric heat capacity (

ρ \times c_{normalp}

) of LMs, see Table , it is more cost effective to follow a dual‐media approach with a thermocline storage tank partially filled with a solid material . A TES system with such a thermocline storage tank is shown in Figure .…”

Section: Proposed Systemmentioning

confidence: 99%

“…An initial assessment of TES systems in a sodium‐based CSP plant was presented by Niedermeier et al Aiming to reduce the LM inventory, a thermocline packed‐bed TES was proposed after investigating different concepts for TES including sensible two‐tank systems, latent and thermochemical storage systems. By using LMs as HTFs, higher storage temperatures can be achieved, what makes the application of advanced power cycles possible to reach higher efficiencies .…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic Analysis of High‐Temperature Energy Storage Concepts Based on Liquid Metal Technology

et al. 2019

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Within the thermal energy storage (TES) initiative NAtional Demonstrator for IseNtropic Energy storage (NADINE), three projects have been conducted, each focusing on TES at different temperature levels. Herein, technical concepts for using liquid metal technology in innovative high‐temperature TES systems are dealt with. This approach implies some challenges; first, the unit costs are relatively large which makes a reduction of the mass inventory necessary. Second, the high thermal diffusivity, which is beneficial in any heat exchanger unit, reduces the efficiency in a single‐tank TES due to the fast degradation of the thermocline. These limitations can be overcome using a nonexpensive solid filler material, and, if properly designed, similar performance as in state‐of‐the‐art molten salt systems can be obtained, while maintaining the advantage of operating at temperatures well beyond their upper limit. Optimization strategies are presented for a reference case including transient behavior of the whole system. The sensitivity of multiple parameters, e.g., porosity, particle size, and influence of storage capacity regarding the discharge efficiency, is investigated.

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“…Considering the relatively low specific volumetric heat capacity (

ρ \times c_{normalp}

Section: Proposed Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis of High‐Temperature Energy Storage Concepts Based on Liquid Metal Technology

et al. 2019

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“…Looking at solar tower systems, the sole commercial solution is de facto the two-tank direct TES technology (using molten salts). Thep ossibility of using liquid metals directly in TES systems would be undoubtedly the preferred solution from an energetic pointo fv iew,b ut several issues limit its applicability.F or example,ar ecent study for sodium [17] has identified otherm ore advantageous storage options for this fluid relativet ot he state-of-the-art two-tank molten salt storage system, such as the single storage tank with as ensible or phase-change filler material.A ccordingly,w ork has been started at KIT.…”

Section: Liquid Metals In Concentrating Solar Powermentioning

confidence: 99%

Liquid Metals as Efficient High‐Temperature Heat‐Transport Fluids

et al. 2017

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Liquid metals appear to be attractive heat‐transport fluids, in particular if looking at their high thermal conductivities and low viscosities. Despite some pioneering technical applications in the past, complex handling, special requirements, safety concerns, and structural degradation of the materials have prevented their widespread application. However, progress in research and development on liquid‐metal science and technology has advanced considerably in the last decade, and this has opened the gate to their broader use in the short term. This requires a more differentiated view on liquid metals, particularly on the specific properties of individual fluids within the context of specific applications. By doing so, many commonly mentioned prejudices vanish or are of minor significance. At the Karlsruhe Institute of Technology, a comprehensive research program on liquid‐metal technology has been pursued for more than 50 years, and some of the advances in different applications will be outlined in this article.

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“…In the recent decades, solar thermal power generation has received increasing attention because it has a relative high thermal efficiency and low cost thermal storage can be used to generate power at night [1]. Thermal storage [2][3][4] and new types of thermal cycle including ORC [5][6][7], Stirling cycle, Brayton cycle [8][9][10] promote the development of solar thermal generation technology. Thermal efficiency and thermal storage are two important issues for the utilization of solar energy.…”

Section: Introductionmentioning

confidence: 99%

Parameter and layout optimization of a high temperature solar combined cycle using low temperature thermal storage

Gao

Nie

et al. 2017

Env Prog and Sustain Energy

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A novel high temperature solar supercritical carbon dioxide (S‐CO2) and organic Rankine cycle (ORC) combined power system with low temperature thermal storage is introduced. The heat releasing of the S‐CO2 can be used as the heat source of the ORC. This system could keep high thermal efficiency, whereas thermal storage temperature is far lower than the maximum temperature of the system. Previous work has proved that the system efficiency can be kept at 38% when the thermal storage temperature is in the range of 220∼230°C. Basic relationship among system efficiency, power ratio and thermal storage temperature are analyzed. The key parameters of the system are optimized under certain constraints. Three possible improved layouts of this system are discussed in the end. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 1234–1243, 2017

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Assessment of thermal energy storage options in a sodium-based CSP plant

Cited by 54 publications

References 55 publications

Thermodynamic Analysis of High‐Temperature Energy Storage Concepts Based on Liquid Metal Technology

Thermodynamic Analysis of High‐Temperature Energy Storage Concepts Based on Liquid Metal Technology

Liquid Metals as Efficient High‐Temperature Heat‐Transport Fluids

Parameter and layout optimization of a high temperature solar combined cycle using low temperature thermal storage

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