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Lamellar-structured phase change composites based on biomass-derived carbonaceous sheets and sodium acetate trihydrate for high-efficient …
Inorganic salt hydrates have a great potential for solar photothermal energy storage due to their high energy-storage density and low cost. However, there are some major drawbacks such as high supercooling degree, shape/form instability, phase segregation, and poor long-term durability found in salt hydrates.
Study on characteristics of photovoltaic and photothermal coupling compressed air energy storage …
Since the maximum temperature of photothermal energy storage can reach about 600, the heating of air by the heat displaced from the compression section is low-temperature heating, which is ignored in this section, and only the heating of air by
Polydopamine/copper nanoparticles synergistically modified carbon foam/octadecanol composite phase change materials for photothermal energy ...
2.3. Characterization and measurement2.3.1. Characterization of microstructure The specific area of surface, pore geometry, and pore distribution of the porous carbon material samples were tested using an N 2 adsorption isotherm analyzer (Micromeritics Instrument, Ltd, China) at a temperature of 77 K and a relative pressure (P/P 0) in the range of 0–1.0, and …
Calculation of the photothermal conversion efficiency
According to figure 3b, was determined and calculated to be 203.20s. s (4) D D s m C h s In addition, mis 0.3 g and C is 4.2 J/g· .Thus, according to Eq. 4, hS is deduced to be 6.20 mW/ oC.QDis expresses heat dissipated from the light absorbed by the quartz sample cell itself, ...
Calculation of the photothermal conversion efficiency
The photothermal conversion efficiency of the Cys-CuS NPs was determined according to the previous method. 1,2 Detailed calculation was given as following: the Cys-CuS(1)
Graphene-doped polymer microencapsulated n-Octadecane for heat storage and photothermal …
The phase-change latent heat energy and solar radiation energy of the [email protected] are 120.7 J and 177.8 J, and the photothermal conversion efficiency is 67.88 %, an increase of 184.02 % in comparison to the MEPCM.
Photothermal Chemistry Based on Solar Energy: …
Photothermal chemistry (PTC) is developed to achieve full-spectral utilization of the solar radiation and drive chemical reactions more efficiently under relatively mild conditions.
Synthesis of hybrid dual-MOF encapsulated phase-changing material for improved broadband light absorption and photothermal …
To improve the overall solar-thermal energy harvesting efficiency of encapsulated phase change materials (EPCM), a novel hierarchic SiO 2 /PCN-224/PB (ES-PCN-PB) composite shell was developed and synthesized through in-situ growth of PCN-224 decorated with PB particles onto SiO 2 encapsulated PCM. encapsulated PCM.
Polypyrrole-boosted photothermal energy storage in MOF-based …
The photothermal energy conversion and storage efficiency (η) of ODA@MOF/PPy can be calculated by the following equation. m is the quality of …
Carbon-intercalated halloysite-based aerogel efficiently encapsulating phase change materials with excellent photothermal conversion and energy ...
3 · The solar to thermal energy conversion and storage efficiency (η) can be calculated from the ratio of the thermal energy stored and the light radiation energy received during the phase change period according to following equation: η = …
Fe3O4/carbon-decorated graphene boosts photothermal …
To upgrade their photothermal conversion and storage capacity, we developed Fe-MOF (metal-organic framework) derived Fe 3 O 4 /C-decorated graphene …
Determination of photothermal conversion efficiency of graphene …
In front of other photothermal agents, such as Au nanostructures, a part from the higher photothermal efficiency, G and GO have an additional advantage, since Au nanoparticles tend to change their shape when illuminated with a …
Micro/nano-encapsulated phase-change materials (ePCMs) for solar photothermal absorption and storage…
The workflow of the current review is organized into five major sections. In Section 2, we present an overview of the different types of PCM systems, their desired characteristics, and key challenges, as well as their potential applications in the solar energy industry Section 3, an elaborate description of ePCMs in indirect (surface-based) and …
3D MXene Sponge: Facile Synthesis, Excellent Hydrophobicity, and High Photothermal Efficiency …
Photothermally assisted superhydrophobic sponges play a vital role in the fields of waste oil collection, oil purification, and solar desalination. However, the widely reported superhydrophobic sponges with photothermal efficiency usually suffer from a post-/premodification process of harmful materials, high loading content of photothermal …
Sustainable Porous Scaffolds with Retained Lignin as An Effective Light-absorbing Material for Efficient Photothermal Energy …
After the impregnation of PCMs, obtained POW/PCMs exhibit excellent shape-stability, latent heat storage capability, and high solar-thermal energy storage efficiency due to the synergistic effect of efficient photonic energy harvesting characteristic of …
Polydopamine/copper nanoparticles synergistically modified carbon foam/octadecanol composite phase change materials for photothermal energy ...
In addition, the energy storage capacity (C es) and energy storage efficiency (η es) of the samples were calculated employing the thermoanalytical data gained from DSC evaluations by the following equations: (1) Δ H m, t h e o r y Δ H f, t h e o r y = w t % × Δ H
In-situ deposition preparation of n-octadecane@Silica@Polydopamine-doped polypyrrole microcapsules for photothermal conversion and thermal energy ...
The photothermal conversion efficiency of microcapsules was calculated by Formula (1). The calculation of photothermal conversion efficiency referred to formula (1) (Du et al., 2019): (1) η % = m Δ H m PA (t t-t 0) × 100 %
Polypyrrole‐boosted photothermal energy storage in MOF‐based …
The photothermal energy conversion and storage efficiency (η) of ODA@MOF/PPy can be calculated by the following equation. m is the quality of ODA@MOF/PPy, Δ H represents the latent heat of ODA@MOF/PPy, P is the intensity of simulated light, S is the area of ODA@MOF/PPy exposed to light, and t is the phase …
Calculation of the photothermal conversion efficiency
heat conversion efficiency ( ) of the Cys-CuS NPs can be calculated to be 38.0%. Theof the nanorods gold was and determined calculated to be 218.80 s, hS is s deduced to oC The absorbance5.76 ofmW/the gold nanorods at 980 nm A980 is 1.062,
Thermal energy storage materials designed from recycled Tetra Pak waste and paraffin waxes with enhanced photothermal …
A new PCM composite utilizes LDPE/Al part of Tetra Pak waste for thermal storage. • Improved thermal conductivity and photoabsorption of PCM composite by Al in TP waste. • High photothermal conversion efficiency of 85 % and passive thermal storage. • …