Experimental study on thermal properties and thermal performance of eutectic hydrated salts/expanded perlite form-stable phase change materials for passive solar energy utilization

Rao, Zhonghao; Xu, Tao-Tao; Liu, Chenzhen; Zheng, Zhang‐Jing; Liang, Lin; Hong, Kun

doi:10.1016/j.solmat.2018.08.012

Cited by 68 publications

(18 citation statements)

References 35 publications

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“…Existing solar energy technologies include photovoltaic panels, thermal collectors, and hybrid photovoltaic/thermal panels [ 8 , 9 ]. However, photovoltaics technologies incorporate toxic metallic materials that include Germanium, Chromium, Gallium, and Cadmium [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Biosynthesized Silica Nanosuspension as Thermal Fluid in Parabolic Solar Panels

Corzo-Deluquez

Pineda-Muñoz

Ruíz-Chamorro

et al. 2021

Entropy

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In this work, the production of biologically synthesized silica nanoparticles was proposed to prepare a nanosuspension as a thermal fluid in parabolic solar panels at the laboratory level. Silica nanoparticles were produced from construction sand in two stages. Biosynthesis broth was produced by Aspergillus niger aerated fermentation in a 1 L bioreactor for 9 days. Each supernatant was contacted with 18% construction sand in a 500 L reactor with mechanical agitation, at a temperature of 25 °C, and a contact time of 30 min. Subsequently, the separation process was carried out. For day 9, a pH value of 1.71 was obtained as well as acid concentrations of 15.78 g/L for citrus and 4.16 g/L for malic. The metal extraction efficiency of Si nanoparticles was 19%. The vibration peaks in the FTIR were characteristic of the presence of silica nanoparticles in wavenumbers 1020 cm−1 and 1150 cm−1. Finally, a prototype solar radiation test bench for parabolic systems was built and provided with a radiation source that falls on a translucent pipe that transports the nanoparticles, which has a pump and a series of thermocouples. The heat capacity of the biotechnologically produced silica nanoparticle suspension was 0.72 ± 0.05 kJ/kgK, using material and energy balances in the flow circuit.

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Section: Introductionmentioning

confidence: 99%

Biosynthesized Silica Nanosuspension as Thermal Fluid in Parabolic Solar Panels

Corzo-Deluquez

Pineda-Muñoz

Ruíz-Chamorro

et al. 2021

Entropy

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“…Many porous materials were used to resolve the complicated PCM leakage due to capillary activity and surface tension during the process of solid-liquid transformation. Currently, the porous package matrix mainly includes diatomite [21,22], expanded perlite [23,24], expanded vermiculite [25], boron nitride foam [26], copper foam [12,27], and fumed silica [13,28,29]. Among them, the abundant pores of EG can not only adsorb PCMs effectively but also provide a lot of extra nucleation sites for heterogeneous nucleation of PCMs so as to reduce the supercooling degree.…”

Section: Introductionmentioning

confidence: 99%

Design of Eutectic Hydrated Salt Composite Phase Change Material with Cement for Thermal Energy Regulation of Buildings

Liu

Yang

et al. 2020

Materials

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An energy-efficient eutectic hydrated salt phase change material based on sodium carbonate decahydrate and disodium hydrogen phosphate dodecahydrate (SD) was prepared. Then, SD was encapsulated into expanded graphite (EG) to produce form-stable composite phase change materials (SD/E), which indicated a positive effect on preventing the leakage of SD, decreasing the supercooling and improving the thermal conductivity. SD/E was further tested for thermal efficiency by simulating the indoor environment with a house-like model which was composed of SD/E and magnesium oxychloride cement. The results showed an excellent thermal insulation effect. This exciting porous composite phase shift material reveals possible architectural applications because of the attractive thermos-physical properties of SD/E.

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“…There into, inorganic PCM have some attractive properties such as larger latent heat density, higher heat conductivity, and lower material cost compared with organics. However, phase separation and supercooling are two severe problems of hydrated salts for technical application . The conventional methods to solve above problems are utilization of thickening and nucleating agents .…”

Section: Introductionmentioning

confidence: 99%

“…However, phase separation and supercooling are two severe problems of hydrated salts for technical application. [20][21][22] The conventional methods to solve above problems are utilization of thickening and nucleating agents. [23][24][25] Hu et al 26 used AIN nanoparticles as nucleating agent and CMC as thickener for SAT, and the results indicated that supercooling degree reduced to 0°C to 2.4°C.…”

Section: Introductionmentioning

confidence: 99%

Modification on hydrated salt‐based phase change composites with carbon fillers for electronic thermal management

et al. 2019

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Summary For electronic thermal management with hydrated salt phase change materials (PCM), supercooling and thermal stability usually inhibit its development. In view of this, novel of disodium hydrogen phosphate dodecahydrate (DSP)‐based composites PCM with miniaturized size is developed to solve these problems. Three kinds of carbon fillers employed as both nucleating agent and heat transfer promoter were added in DSP separately. The influences of carbon fillers' specific surface area, particle size, and adsorption mode on thermal properties of DSP‐based composites PCM were investigated experimentally. The thermal conductive chains of composites PCM were detected by energy dispersive spectroscopy. The supercooling degree was analyzed by melting‐freezing test. Temperature‐regulated property was captured by infrared imager. In the present work, the supercooling degree of GNS/DSP composites PCM is efficiently reduced to 97.24% compared with the pure DSP. Negligible change in phase change temperature of the CNTS/DSP composites PCM was confirmed after 200 times cycles. There was no obvious liquid leakage of DSP when 2 wt% of carbon fillers were added in composites PCM. The enhancement on thermal properties of DSP is a promising strategy for numerous thermal applications.

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Experimental study on thermal properties and thermal performance of eutectic hydrated salts/expanded perlite form-stable phase change materials for passive solar energy utilization

Cited by 68 publications

References 35 publications

Biosynthesized Silica Nanosuspension as Thermal Fluid in Parabolic Solar Panels

Biosynthesized Silica Nanosuspension as Thermal Fluid in Parabolic Solar Panels

Design of Eutectic Hydrated Salt Composite Phase Change Material with Cement for Thermal Energy Regulation of Buildings

Modification on hydrated salt‐based phase change composites with carbon fillers for electronic thermal management

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