Experimental investigation of basalt rocks as storage material for high-temperature concentrated solar power plants

Nahhas, Tamar; Py, Xavier; Sadiki, Najim

doi:10.1016/j.rser.2019.04.060

Cited by 59 publications

(47 citation statements)

References 54 publications

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“…The amount of heat stored is proportional to the density, volume, specific heat and temperature changes of the stored material [16]. Heat storage media can be various substances, such as liquids (water, mineral oils, salt solutions, liquid metals and alloys) or solids (stones, concrete, sand, bricks) [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

The Comparison of Different Types of Heat Accumulators and Benefits of Their Use in Horticulture

Kurpaska

Knaga

Latała

et al. 2020

Sensors

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This paper presents the results of the analysis of thermal issues and energy efficiency of three types of accumulators; namely stone-bed; water and phase change. Research experiments were carried out during April–October 2013 in a standard commercial semi-cylindrical high plastic tunnel with tomato cultivation of 150 m2. A stone-bed accumulator; with an area of almost 75 m2 was installed in the tunnel below ground level; while a water accumulator with a volume of 4 m3 was installed outside the tunnel. A phase change material (PCM) accumulator, with a volume of 1 m3 containing paraffin, was located inside the tunnel. The heat storage capacity of the tested accumulators and the energy efficiency of the process were determined based on the analyses of the 392 stone-bed charging and discharging cycles, the 62 water accumulator charging cycles and close to 40 PCM accumulator charging and discharging cycles. Dependencies in the form of easily measurable parameters; have been established to determine the amount of stored heat; as well as the conditions for which the effectiveness of these processes reaches the highest value. The presented analysis falls under the pro-ecological scope of replacing fossil fuels with renewable energy. As a result of the analysis; it was found that; in the case of a stone-bed; such an accumulator shows higher efficiency at lower parameters; that is, temperature difference and solar radiation intensity. In turn; a higher temperature difference and a higher value of solar radiation intensity are required for the water accumulator. The energy storage efficiency of the PCM accumulator is emphatically smaller and not comparable with either the stone-bed or the water accumulator.

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Section: Introductionmentioning

confidence: 99%

The Comparison of Different Types of Heat Accumulators and Benefits of Their Use in Horticulture

Kurpaska

Knaga

Latała

et al. 2020

Sensors

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show abstract

“…19. In the visualized experiments ( [7][8][9]), comparable heat capacities were measured while also similar effects, like a dropping heat capacity at higher temperatures, can be identified ( [7]). The authors of the respective paper, i.e.…”

Section: Validation and Outlookmentioning

confidence: 59%

Speed Of Reaching The Full Potential Heat Capacity Of A Basalt Product: Experimental Results

Rindt¹,

Pilař²,

Hrdlička³

2022

Atlantis Highlights in Engineering

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Renewable Energy Sources naturally deliver energy intermittently, causing fluctuations in energy supply. The energy is therefore also not provided corresponding to the actual need, but according to the availability. Hence, the demand for energy storage is rising with the increasing utilization of renewable energy sources, tackling the difficulties coming along with it. Carnot-Batteries are one out of a few geographically independent storage possibilities for longer durations. The thermal energy storages employed in Carnot-Batteries vary from liquid molten salt storage with two-tanks or single-tank thermocline storage to packed bed configurations with encapsulated PCM or natural solid materials, like rocks. Storage materials, which are found plenty in nature, having nearly no direct impact on the environment, are water and rocks. Natural Rocks offer a greater temperature span for operation than water and are therefore suitable for a wider range of applications. A possible natural rock for use in thermal energy storage is volcanic material basalt. In this experimental work, basalt, after its usage in cast form as flue pipes in a power plant, is analyzed, focusing on its properties for energy storage applications. Using this product would offer the reuse of an otherwise not anymore useful, leftover product and provide a storage material without the need of taking it from nature. The experimental research to retrieve the speed of reaching the full potential heat capacity of this product is described. The samples of basalt and the basalt product are analyzed at different temperatures from 300°C to 750°C. Additionally, air cooling, from these temperatures down to 100°C, and surface structure changes are evaluated. Insights into important boundary conditions for employment as storage material are given. In future work, it is anticipated to use these results as the base for a charging model of the basalt product and its validation.Index Terms-thermal energy storage (TES), Carnot-Batteries, power-to-heat-to-power (P2H2P), basalt, heat capacity SGS20/116/OHK2/2T/12

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“…This may be the conversion of the olivine phase to hematite (Fe 2 O 3 ). 39 Because of the high Fe content in B-2, this peak is more evident.…”

Section: Resultsmentioning

confidence: 98%

Exploration of Basalt Glasses as High-Temperature Sensible Heat Storage Materials

et al. 2020

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Thermal energy storage (TES) systems are a key technology that utilizes renewable energy and low-level thermal energy to ensure continuous and stable operation in concentrated solar power plants, family heating, and industrial waste heat recovery fields. It solves the intermittent problem of solar radiation and significantly improves energy efficiency and economic benefits. Three varieties of natural basalt ores have been selected, namely, intermediate, basic, and ultrabasic basalt, which have been prepared into basalt glasses by the melt-quenching method. The applicability of basalt glass to high-temperature heat storage applications is studied. In the present paper, the chemical composition and structure of basalt glasses have been determined. The effect of temperature and composition on key thermophysical properties such as density, heat capacity, thermal diffusion, thermal conductivity, and thermal expansion has been analyzed during a series of thermal cycles. It has been confirmed that basalt glass has extremely high heat storage performance and thermal stability, and its working temperature is as high as 1000 °C such that it can be used as a solar energy heat storage material.

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Experimental investigation of basalt rocks as storage material for high-temperature concentrated solar power plants

Cited by 59 publications

References 54 publications

The Comparison of Different Types of Heat Accumulators and Benefits of Their Use in Horticulture

The Comparison of Different Types of Heat Accumulators and Benefits of Their Use in Horticulture

Speed Of Reaching The Full Potential Heat Capacity Of A Basalt Product: Experimental Results

Exploration of Basalt Glasses as High-Temperature Sensible Heat Storage Materials

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