The 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 MoreEnergy conversion efficiency is one of the key characteristics of energy systems. The definition of the energy conversion efficiency is the useful energy output (benefit) divided by the energy input (cost). Energy can be divided into quantity and quality terms. For electric power, quantity and quality are described by current and voltage ...
Learn MorePhotothermal materials can effectively absorb solar energy and convert it into heat energy [8], which has become a research hotspot. Phase change materials (PCM) with high energy density and heat absorption and release efficiency [ 9 ], have been widely used in many fields as improving building heat storage capacity [ 10 ], reducing building …
Learn MoreReduced graphene oxide and zirconium carbide co-modified melamine sponge/paraffin wax composites as new form-stable phase change materials for photothermal energy conversion and storage Appl. Therm. Eng., 163 ( 2019 )
Learn MoreGreen energy storage technology of wood. • Synthesis of a stable PEG-based phase change energy storage material to prevent PEG leakage. • PCES-Wood shows high phase change enthalpy and high thermal conductivity. • PCES-Wood shows good photothermal conversion efficiency and long-term thermal insulation performance.
Learn MoreThe photothermal conversion efficiency was calculated as described in the following equation [[24], [25], [26]]: (2) η = m Δ H P A (t s − t e) where m and ΔH are respectively the weight (g) and fusion enthalpy (J/g) of the PCM composites; P (mW/cm 2) and A (cm 2) are the power of simulated solar irradiation and the surface area of sample ...
Learn MoreAs a fundamental property of materials, accurate measurement of light-to-heat conversion efficiency (LHCE) is of vital importance in developing advanced …
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 MoreIn recent years, the combination of both thermal and photochemical contributions has provided interesting opportunities for solar upgrading of catalytic processes. Photothermal catalysis works at the interface between purely photochemical processes, which involve the direct conversion of photon energy into chemical energy, …
Learn MoreThe 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. The photothermal conversion efficiencies of the microcapsule samples with GO nanosheets were also higher than …
Learn MoreAfter the calculation, the photothermal conversion and storage efficiency of CPCM, CMPCM-1, CMPCM-2, CMPCM-3, and CMPCM-4 are 47.2%, 61.4%, 70.8%, 78.6% and 85.9% respectively. The results show that CPCM after adding melanin can obtain the photothermal properties of melanin, and the photothermal conversion …
Learn MoreImproving photothermal conversion efficiency (PCE) is critical to facilitate therapeutic performance during photothermal therapy (PTT). However, current strategies of …
Learn MoreWhen the volume fraction f v = 5 × 10 −6 and the depth h = 15 mm, the photothermal conversion efficiency ... Solar thermal conversion and thermal energy storage of CuO/Paraffin phase change composites Int. J. Heat Mass Tran., 130 (2018), pp. 1133-1140 [3] ...
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 MoreIt should be noted that such high temperature is attributed to the photothermal conversion efficiency of TPP-2IND, as well as the low thermal conductivity of porous structure for thermal insulation. Meanwhile, the IR thermal images were taken by IR thermal camera and showed the distinct temperature changes of PU+TPP-2IND foam …
Learn MoreImproving photothermal conversion efficiency (PCE) is critical to facilitate therapeutic performance during photothermal therapy (PTT). However, current strategies of prompting PCE always involve complex synthesis or modification of photothermal agents, thereby significantly inhibiting the practical applications and fundamental understanding of …
Learn MoreThe prepared PW@MOF/PDA composite PCMs exhibit high photothermal conversion and storage efficiency, excellent thermal stability, shape stability, energy storage stability, and photothermal conversion stability. Download : Download high-res image (235KB) ...
Learn MoreThe definition of the energy conversion efficiency is the useful energy output (benefit) divided by the energy input (cost). Energy can be divided into quantity and quality terms. For electric power, quantity and quality are described by current and voltage, respectively. The electric power efficiency of hydrogen fuel cells can be written as ...
Learn MoreThe photothermal conversion efficiency (η) was calculated by the proportion of thermal energy stored in PW and the light radiation energy collected during phase change process. The calculation equation was as follows. (1) η …
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 MoreIn this article, we investigated systematically the photothermal conversion efficiency and the molar heating rate of GNS and GNR in three groups (S-group, M-group and L-group, representing groups of nanostructures with …
Learn Morelight-to-heat conversion efficiency(i.e., internal light-to-heat conversion efficiency;iHCE), which is definedas the capability to convert the absorbed energy specifically into heat. Moreover, their size should not exceed 200 nm to avoid undesired effects,which might appear after injection, such as
Learn MoreAs shown in Fig. 3 a, increasing the temperature to 5–30 °C resulted in the raise of CO productivity from 28.3 to 34.5 μmol·g −1 ·h −1. By using a CdS/ZnO photocatalyst, Zhang et al. [ 54] obtained higher CO formation up to 118 μmol·g −1 ·h −1 when the reaction temperature was increased to 386 °C.
Learn MorePhotothermal materials can effectively absorb solar energy and convert it into heat energy [8], which has become a research hotspot. Phase change materials (PCM) with high energy density and heat absorption and release efficiency [ 9 ], have been widely used in many fields as improving building heat storage capacity [ 10 ], reducing building ...
Learn MoreThe average photothermal conversion efficiency (PTCE) can be as high as 72.96%. The excellent photothermal performance to the excellent light-trapping ability of the pyramidal surface nanostructures during solar …
Learn MoreFunctional colloidal nanoparticles capable of converting between various energy types are finding an increasing number of applications. One of the relevant examples concerns light-to-heat-converting colloidal nanoparticles that may be useful for localized photothermal therapy of cancers. Unfortunately, quantitative comparison and ranking of nanoheaters …
Learn MoreTo this end, we review the use of plasmonic photothermal conversion in several typical scenarios to highlight the key factors that need to be considered, including solar energy harvesting, …
Learn MoreIn this work, MoS 2 QDs, MoS 2 NFs and MoS 2 NSs have been successfully synthesized via different methods, and the corresponding FESEM images are presented in Fig. 1 a-c. The obtained MoS 2 QDs are of rice-like shape, MoS 2 NFs are of nanoflower-like structure, and which are composedof plenty of nanosheets, while for MoS …
Learn MoreEfficiency of power plants, world total, 2008. Energy conversion efficiency ( η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The input, as well as the useful output may be chemical, electric power, mechanical work, light (radiation), or heat. The resulting value, η (eta), ranges ...
Learn MoreBy using the photothermal conversion formula, the photothermal conversion efficiency of p-thermowood-6K and thermowood-6K was calculated to be 83.2 % and 24.6 %, respectively. After adding TA/Fe 3+, the photothermal conversion efficiency of p-thermowood-6K was about three times higher than that of thermowood …
Learn MorePer the existing literature [40], [41], [42], the efficiency calculation of integrated photothermal storage can be directly calculated for thinner thermal storage materials, attributed to their minimal internal temperature gradient. Contrastingly, our research reveals that employing thicker heat storage materials in extensive, high …
Learn MoreIn order to retrieve the photothermal conversion efficiency η, it is necessary to measure the temperature variation of the GNR dispersions as a function of …
Learn MoreThe following formula was used to calculate the photothermal storage efficiency: (7) η = m (Δ H + Q) I S (t e − t s) × 100 % where m is the mass of PCB-20, ∆H and Q are the latent and sensible heats of PCB-20 respectively.
Learn MoreTo evaluate the photothermal conversion ability of samples, the photothermal conversion storage efficiency (χ) of the sample was evaluated by the formula [40], [41], [42]: (1) χ = m Δ H I S T r-T c × 100 % Where S represents the surface area of the sample; T r and T c represent the termination and start time of the phase …
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 MoreImproving photothermal conversion efficiency (PCE) is critical to facilitate therapeutic performance during photothermal therapy (PTT). However, current strategies of prompting PCE always involve complex synthesis or modification of photothermal agents, thereby significantly inhibiting the practical applications and fundamental understanding of …
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