Organic phase change materials (PCMs) are promising to utilize thermal energy from solar radiation for photothermal energy conversion. However, the issues of poor photo absorption and liquid leakage greatly restrict their practical application. Herein, a sustainable porous scaffold comprising period …
Learn MoreCalculation of the photothermal conversion efficiency. Where h is the heat transfer coefficient, S is the surface area of the container, and the value of hS is obtained from the Eq.4 and Figure 3b. The maximum steady temperature (Tmax) of the solution of the Cys-CuS NPs was 40.1 oC and environmental temperature (TSurr ) was 18.6 oC.
Learn MoreResults showed that the actual efficiency of PCMs was less than 25%, which truly reflected the photo-thermal conversion performance of PCMs, demonstrating …
Learn MoreUp to now, there is still no standard calculation equation for the energy conversion efficiency, ... 2019, 149: 556- 563. [45] Li J, Chang Q, Xue C, et al. Carbon dots efficiently enhance photothermal conversion and storage of organic phase change materials . [46 ...
Learn MoreAlthough only the absorbed photons are treated as the input energy, this equation quantitatively eliminates the impact of the heat transfer and the concentration of the photothermal material on the light …
Learn MoreWith the increasing global instability in the development of the world, the efficient storage and conversion of energy have alerted attention. In this work, a novel conjugated microporous polymer hollow spheres (CMPHS) with a high specific surface (323 m 2 g −1) and unique cavity structure are creatively prepared. ...
Learn MoreFig. 9 (d) displays the microcapsule samples'' photothermal conversion efficiency, simulated solar radiation energy, and phase-change latent heat energy curve. 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 …
Learn MoreTo alleviate the predicament of resource shortage and environmental pollution, efficiently using abundant solar energy is a great challenge. Herein, we prepared unique photothermal conversion phase-change materials, namely, CNT@PCMs, by introducing carbon nanotubes (CNTs) used as photothermal conversion materials into the …
Learn MoreCompared with the thermal curing process, the photocuring process has advantages such as high efficiency and less energy consumption. However, the preparation of photocurable phase change materials (PCMs) with photothermal conversion and self-cleaning properties is challenging due to the conflict be …
Learn MoreThe PDA/AgNPs layer can efficiently convert light energy into thermal energy, while the PU shell facilitates the transfer of this energy to the internal PCM for storage. The photothermal conversion of the PDA/AgNPs layer primarily relies on the excellent photothermal effect of PDA and the synergistic effect of silver nanoparticle nanoparticles …
Learn MoreOrganic phase change materials (PCMs) have been widely applied in thermal energy storage fields due to their good structural stability, high energy storage density, adjustable phase change temperature and non-toxicity. However, the poor solar-thermal conversion performance and structure stability restrict the large-scale …
Learn MoreGold nanoparticles (GNPs) improve remarkably the photothermal conversion efficiency. The efficiency enhancement reaches 65% comparing to the base fluid at 6 ppm GNP. The specific absorption rate (SAR) of GNPs reach 10 kW/gram at 0.15 ppm GNP. The comparison with other materials shows that GNP has the highest SAR.
Learn More1. Introduction Recent years, the exploration and harnessing of solar energy have garnered significant attention. Among the wide array of solar-energy utilization methods (including photovoltaic, photochemical, and photothermal approaches), solar-thermal conversion ...
Learn MorePTT exploits nanoparticles (called nanoheaters), that upon proper biofunction-alization may target cancerous tissues, and under light stimulation may convert the energy of photons …
Learn MoreThe prepared P-AEG-C exhibited superior mechanical properties and thermal energy storage properties, with a compressive strength of 14.8 MPa and light–thermal conversion efficiency of 92%. Therefore, the synthesized P-AEG-C has potential in light–thermal conversion applications and energy-saving buildings.
Learn MoreThe photothermal conversion efficiency (γ) is calculated as the ratio of the latent heat-storage energy to the solar irradiation energy throughout the phase …
Learn MoreThe CCNT layer provided excellent photothermal conversion and self-cleaning properties. The experimental results show that the latent heat of the PCM can reach 124.2 J/g, the water contact …
Learn MoreImpor-tantly, the photothermal conversion and storage efficiency of ODA@MOF/ PPy ‐6% is up to 88.3%. Additionally, our developed MOF‐based photothermal composite PCMs also exhibit long‐standing antileakage stability, energy storage stability, and photothermal conversion stability. The proposed coating strategy and in‐depth understanding ...
Learn MoreBy creating energy-efficient processes and sustainable catalyst designs, it is plausible to improve the economic viability of photothermal catalysis for CO 2 conversion. Furthermore, Xiao & Jiang elaborate on the crucial role of light-mediated catalysis, encompassing photothermal catalysis, in converting solar energy into valuable …
Learn MoreRobust, double-layered phase-changing microcapsules with superior solar-thermal conversion capability and extremely high energy storage density for efficient solar energy storage[J] Renew. Energy., 180 ( 2021 ), pp. 725 - 733
Learn MoreWhen irradiated with a laser beam with emission at 980 nm, while G is still the most efficient photothermal agent, other materials like Cu 7.2 S 4 nanocrystals show a higher photothermal conversion efficiency [43] than GO.
Learn MoreThe prepared composites with excellent shape stability present favorable thermal energy storage in photothermal conversion and thermal modulation technologies. Li et al. [ 7 ] synthesized a highly innovative conductive and photothermal phase change composite (PCC) by vacuum impregnation using a modified carbon black as a substrate.
Learn MoreMeanwhile, the corresponding intrinsic photothermal conversion efficiency and effective thermal storage efficiency are up to 60.1% and 97.3%, respectively. Introduction Nowadays, the energy consumption pattern of high-carbon is no longer suitable for global energy markets, and the mode of clean and low-carbon has …
Learn MorePhotothermal catalysis, as a promising technology, can dramatically enhance the catalytic activity and modulate the catalytic pathway due to a synergy between photochemical and thermochemical reaction pathways. It is pivotal to improving the photothermal catalytic conversion by exploring efficient photothermal catalysts with …
Learn MoreEquation (4) expresses the process of CO 2 to CH 3 OH as follows: (4) CO 2 ( g) + 3 H 2 ( g) → C H 3 OH ( l) + H 2 O ( g) Δ H = - 49.5 k J / m o l. From the equation presented, we can observe that the transformation of CO 2 into CH 3 OH involves a reduction in gas volume and is classified as an exothermic reaction.
Learn MoreAs a result, the photothermal energy storage efficiency of POW-B/PEG and POW-S/PEG are ≈ 86.7% and 79.8% (Figure 4c), respectively. The POW/PEG composites also show great potential in the thermal regulation of buildings.
Learn MoreMorphology-controlled synthesis microspheres with urchin-like core-shell structure • Synergistically enhancing efficient photothermal conversion and heat energy storage • The light-thermal conversion efficiency …
Learn MoreCalculation of the photothermal conversion efficiency The photothermal conversion efficiency of the Cys-CuS NPs was determined according to the previous method. 1,2 …
Learn MoreFor example, Yang et al. [19] impregnated Fe 3 O 4 and myristyl alcohol into wood, and the addition of Fe 3 O 4 nanoparticles improved the photothermal conversion efficiency of the composites. Benefiting from the magnetothermal effect, the wood composite can be heated under an alternating magnetic field.
Learn MoreLow photothermal conversion efficiency and difficulty in thermal energy storage are still obstacles during the solar energy utilization and conversion [9]. In order to solve the above problems, finding a suitable thermal storage material with photothermal conversion capability for long-term solar thermal energy storage has become a …
Learn MoreIn this review, we comprehensively summarized the state-of-the-art photothermal applications for solar energy conversion, including photothermal water evaporation and desalination, photothermal …
Learn More6.1 Principles. Photothermal conversion of solar energy, to produce hot fluid or hot air, takes place in solar collectors. Efficient conversion requires that a solar-absorbing surface is in thermal contact with the fluid or gas, and that thermal losses to the environment are minimized. The absorber should be positioned under a transparent cover ...
Learn MoreThese photothermal microPCMs are promising solar-driven energy storage fillers for solar heating of water, energy-saving buildings and thermoregulation textiles [[22], [23], [24]]. PPy was rationally chosen as the photothermal polymer because of its broad-spectrum absorption, high photothermal conversion efficiency, and its facile …
Learn MoreIn order to improve energy efficiency and reduce energy waste, efficient energy conversion and storage are current research hotspots. Light-thermal-electricity energy systems can reconcile the limited supply of fossil fuel power generation with the use of renewable and clean energy, contributing to green and sustainable production and living.
Learn MoreSolar-thermal conversion has attracted tremendous research interests due to the high energy conversion efficiency and the wide range applications of the generated thermal energy. Solar-steam generation for clean water production is one of the most promising applications of the solar-thermal energy.
Learn MoreND was firstly incorporated into NEPCM for efficient solar energy utilization. • The phase change nanocapsules exhibit a high thermal conductivity of 0.747 W/m·K. • The nanocapsules present exceptional latent heat and leak-proof performance. • The photothermal
Learn MoreTherefore, there is an urgent need to find a method to reduce the usage of photothermal conversion particles without compromising their photothermal conversion and storage capabilities. Introducing dopamine dispersed within phase change materials containing photothermal conversion particles can effectively decrease the content of …
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