An overview of the state of the art and challenges in the use of gelling and thickening agents to create stable thermal energy storage materials.
Author(s) : PRABAKARAN R., DHAMODHARAN P., SATHISHKUMAR A., GULLO P., VIKRAM M. P., PANDIARAJ S., ALODHAYB A., KHOUQEER G. A., KIM S. -C.
Type of article: Periodical article, Review
Summary
Building cooling and heating, solar-powered energy production, energy recovery, and other energy-consuming industries have all seen an increase in the use of cold/hot latent thermal energy storage (LH-TES). Through energy recovery, LH-TES that uses phase-change materials (PCMs) as a storage medium helps to close the energy supply and demand gap and raises the possibility of energy savings. However, the stability, thermal, physical, and chemical properties of the PCM play a major role in how effectively it can be used. In recent years, adding gelling and thickening agents (GTAs) has gained popularity apart from the nanoparticles (NPs) and nucleating triggers (NTs), particularly for the creation of stable PCMs. Therefore, the current work’s goal is to provide an overview of how GTAs are used in the process of developing reliable PCMs for TES applications. It has been found that using GTAs not only increased stability but also decreased sedimentation, leakage, and the supercooling degree (SCD). It was noted that the addition of a GTA with a weight percentage of 2–15% resulted in excellent stability with a negligible leakage rate and latent heat reduced by 3.6–35% after only 200 cycles. Furthermore, PCMs for solar-thermal and building heating systems in the medium-temperature range (21–61 °C) were mostly studied for their performance with GTAs, but no study for a cool TES application was reported. Most works have studied inorganic PCM components with GTAs, and a few reports are available for paraffin. However, the GTA blending resulted in reduced thermal performance due to a decrease in thermal conductivity, latent heat, and a rise in viscosity. Further, NTs and NPs with small amounts were seeded into the PCM-GTA for eradicating the SCD with enhanced TC and accelerated energy transfer.
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- Original title: An overview of the state of the art and challenges in the use of gelling and thickening agents to create stable thermal energy storage materials.
- Record ID : 30031269
- Languages: English
- Subject: Technology
- Source: Energies - vol. 16 - n. 8
- Publishers: MDPI
- Publication date: 2023/04
- DOI: http://dx.doi.org/https://doi.org/10.3390/en16083306
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