Stability Testing of Thermal Oil in Direct Contact with Rocks used as Filler Material for Thermal Energy Storage in CSP Power Plants

Grirate, H.; Zari, Nadia; Elmchaouri, Abdellah; Molina, Sophie; Couturier, Raphaël

doi:10.1016/j.egypro.2015.03.109

Cited by 9 publications

(5 citation statements)

References 6 publications

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“…UV-Visible spectroscopy revealed the yellowing of the oil caused the absorption edge to move to the right by 11 nm at a wavelength of 380 nm. A similar result was also reported by Grirate et al while investigating aged Therminol 66 ® at elevated temperatures [14]. Since colour changes can indicate decomposition or oxidation, FTIR analysis was undertaken to assess the oils stability after ultrasonic processing.…”

Section: Resultssupporting

confidence: 78%

The Addition of Graphene Oxide to Enhance the Photo-Thermal Performance of a Premier Organic Heat Transfer Oil

Chamsa-ard¹,

Fawcett²,

Fung³

et al. 2021

ijSciences

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The present study investigated the improvement in photothermal response and temperature enhancement of a commercially available organic thermal oil when small quantities of graphene oxide (0.1 to 0.3% w/v) were added. Characterisation studies revealed the ultrasonic processing procedure did not change the chemical composition of the organic oil, which was found to be thermally stable up to 175 °C before complete decomposition at 315 °C. When the GO-based fluids were exposed to a solar irradiance of 985 Wm -2 , the temperature enhancements achieved over the exposure period of 20 minutes typically ranged from 42.4 to 43.2%. The temperature enhancements achieved indicate the GObased fluids have the potential to be used in direct-absorption solar collectors for improved performance.

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Section: Resultssupporting

confidence: 78%

The Addition of Graphene Oxide to Enhance the Photo-Thermal Performance of a Premier Organic Heat Transfer Oil

Chamsa-ard¹,

Fawcett²,

Fung³

et al. 2021

ijSciences

View full text Add to dashboard Cite

show abstract

“…At the end of thermal cycling, similar spectra were observed before and after thermal cycling with some new peaks between 2850 and 3050 cm −1 , corresponding to an organic substance as seen in the spectrum in red of Figure 7. FTIR spectra of Therminol 66 synthetic oil before cycling and after thermal cycling was examined before by Grirate et al 34 and peaks around 2950, 2850, 1600, 1500, and 600 cm −1 were observed. These new peaks and the others seen after thermal cycling are compatible with the results of Grirate et al, 34 which shows the presence of Therminol 66 oil without any degradation of chemical structure.…”

Section: Resultsmentioning

confidence: 99%

“…FTIR spectra of Therminol 66 synthetic oil before cycling and after thermal cycling was examined before by Grirate et al 34 and peaks around 2950, 2850, 1600, 1500, and 600 cm −1 were observed. These new peaks and the others seen after thermal cycling are compatible with the results of Grirate et al, 34 which shows the presence of Therminol 66 oil without any degradation of chemical structure.…”

Section: Resultsmentioning

confidence: 99%

“…Hot air was used as heat transfer fluid from 300 C to 550 C. Although no significant mass loss was observed, cracking occurred due to thermal expansion. Grirate et al 34 studied the compatibility of quartzite pebbles and silica sand with Therminol 66 synthetic oil. No significant change was found in both oil and rocks that affects the TES system performance.…”

Section: Novelty Statementmentioning

confidence: 99%

“…At the end of thermal cycling, similar spectra were observed before and after thermal cycling with some new peaks between 2850 and 3050 cm À1 , corresponding to an organic substance as seen in the spectrum in red of Figure 7. FTIR spectra of Therminol 66 synthetic oil before cycling and after thermal cycling was examined before by Grirate et al 34…”

Section: Change In Structural and Chemical Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Long‐term stability of sensible thermal energy storage materials developed from demolition wastes interacting with hot heat transfer fluid

Koçak

Fernández

Paksoy

2021

Intl J of Energy Research

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Summary Packed‐bed thermal energy storage (TES) system filled with low cost and sustainable sensible thermal energy storage material (STESM) is a promising option for medium–high temperature applications. STESM developed from demolition wastes are eco‐innovative and compatible with circular economy. They can be used in solar heat industrial applications up to 750°C. One of the main concerns that should be taken into consideration is the stability of STESM developed from demolition wastes in direct contact with hot heat transfer fluids (HTFs). In this study, thermal and mechanical stability of STESM developed from demolition waste were investigated using repeated heating and cooling cycles in Therminol 66 synthetic oil as HTF at 150°C for up to 500 hours. The characterization results before and after thermal cycling showed that new STESM developed from demolition wastes is thermally and mechanically stable. Also, strong oil penetration into the STESM samples improved the porosity, strength, and specific heat capacity. The specific heat capacity and mechanical strength values increased from 1330 to 1490 J/kgC and from 4 to 6 MPa, respectively. These results suggest that STESM samples developed from demolition waste can be used reliably in solar heat industrial applications for long term.

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A critical overview of the suitability of natural Moroccan rocks for high temperature thermal energy storage applications: Towards an effective dispatching of concentrated solar power plants

Alami

Asbik

Boualou

et al. 2022

Journal of Energy Storage

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Stability Testing of Thermal Oil in Direct Contact with Rocks used as Filler Material for Thermal Energy Storage in CSP Power Plants

Cited by 9 publications

References 6 publications

The Addition of Graphene Oxide to Enhance the Photo-Thermal Performance of a Premier Organic Heat Transfer Oil

The Addition of Graphene Oxide to Enhance the Photo-Thermal Performance of a Premier Organic Heat Transfer Oil

Long‐term stability of sensible thermal energy storage materials developed from demolition wastes interacting with hot heat transfer fluid

A critical overview of the suitability of natural Moroccan rocks for high temperature thermal energy storage applications: Towards an effective dispatching of concentrated solar power plants

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