Carbon nanotube sponge encapsulated Ag-MWCNTs/PW composite phase change materials with enhanced thermal conductivity, high solar-/electric-thermal energy conversion and storage ... It is an effective way to reduce the interface resistance between CNTs and surrounding medium by building the energy transfer channel between them by hybridizing ...
In the CET and CCER market, thermal power GENCOs increase the cost of carbon emissions while wind and solar power GENCOs are compensated for clean energy, …
9. Naici Bing, Guanzheng Wu, Jie Yang, Lifei Chen *, Huaqing Xie, Wei Yu*. Thermally induced flexible phase change materials composites with enhanced thermal conductivity for solar thermal conversion and storage [J]. Solar Energy Materials and Solar Cells 240 (2022) 111684. 10.
1. Introduction. From 2010 to 2040, the worldwide energy consumption will increase by 56 %, from 5.24 × 10 −9 billion Btu to 8.2 × 10 −9 billion Btu according to the analysis data of the US Energy Information Administration [1, 2].The rapid increase in energy demand and the consumption of fossil energy have brought serious energy crisis problems such as the …
Phase change materials (PCMs) have aroused significant interest as promising materials for solar thermal energy conversion and storage. However, the long-standing …
A thermal conductivity of 1.552 W/(m·K) was achieved in s-MWCNTs/PVDF composite with 10 wt% s-MWCNTs loading, about 9 times in comparison to that of pure PVDF …
The thermal conductivity was calculated according to the thermal conductivity formula: k=Cp⋅ρ⋅α. When the Solar salt was doped with 0.4% MWCNTs, the thermal conductivity was greatly improved, increasing by 87% to 0.77 W/(m⋅k). And the influence of carbon nanotubes on the spatial structure of nitrate was analyzed by Raman …
However, because the thermal conductivity of the CFs can reach 600 W·K −1 ·m −1, the thermal conductivity of the obtained PCC should be enhanced to 66.78 W·K −1 ·m −1 at the CF loading of 11.1 vol% (20 wt%, calculated in Note S1 in the Supporting Information) according to the effective medium theoretical model for two-phase ...
Many countries have made commitments to achieve net-zero targets. For instance, the UK, Japan, and South Korea aim to reach the goal by 2050, China by 2060, and India by 2070 [1].To achieve this goal, clean solar energy and wind energy have garnered increasing attention [2, 3].For example, in China, the electricity from photovoltaics and wind …
In addition, a solar-thermal device integrated with the PCC, a solar selective absorber and highly transparent glass is utilized to augment the performance of solar-thermal …
In recent years, the demand direction for electronic equipment has expanded into embedded and miniaturized devices. The heat radiation problem has become one of the most significant factors for hindering the development of electronic devices. Since heat radiation material is one of the important components in electronic devices, the demand for enhancing …
A combination of energy price, limited fossil fuels, energy conservation for the next generation, and global environmental concerns such as pollution and global warming has led scientists and engineers to concentrate on energy consumption reduction and usage of renewable energy such as solar, wind, hydro and wave energy (Waqas and Ud Din, 2013).The …
The thermal conductivity coefficient is a crucial parameter to study phase change material which plays a significant role in guiding the application of phase change material. Low thermal conductivity limits the use of PCMs in heat storage applications [37]. The addition of EG enhances the thermal conductivity of PCMs significantly.
Thermal metamaterials based on moving thermal conductive medium provide a new way to control heat flows, 39–42 which has been successfully used to achieve thermal zero-index cloak 38 and in situ tunable analog thermal material ... This work was supported by the National Natural Science Foundation of China (Grant Nos. 61971300, 12274317 ...
A new design of extensible solar-driven thermoelectric array with enhanced properties.. The array''s output voltage is 2.6-fold of that of conventional copper-bridged array. • Combing solar revivers, bridges, and voltage fluctuation suppressors by using PCMs.. PCMs with extremely high thermal (17.0 W/mK) and electrical conductivity (84.4 S/cm).. A hypergravity …
The thermal conductivity of diamond 284 can reach ~2,000 W m −1 K −1, comparable to the in-plane thermal conductivity of bulk graphite 285, but these materials are not commonly used, because ...
Phase change materials (PCMs) offer a promising solution to address the challenges posed by intermittency and fluctuations in solar thermal utilization. However, for organic solid–liquid PCMs, issues such as leakage, low thermal conductivity, lack of efficient solar-thermal media, and flammability have constrained their broad applications. Herein, we …
The utilization of sugar alcohols as phase change materials (PCMs) in medium-temperature solar thermal applications has significant potential, yet their utilization is limited by their low thermal conductivity and potential leakage during the phase change process. In order to achieve greater thermal conductivity and higher photothermal conversion efficiencies, this …
The performance of PCMs is greatly affected by their poor thermal conductivity. Heat transfer improvement methods like fins [4], heat pipes [5], microencapsulation [6], dispersing highly conductive fillers [7, 8], and nano encapsulation [9] have been proposed in different studies.Wu et al. [10] used compression-induced construction of large aligned graphite sheets …
To address this, a liquid crystal elastomer (LCE) is employed as a buffer interlayer to effectively mitigate residual thermal stress. This is achieved by improving the thermal conductivity of the electron transport layer from 0.76 to 1.07 W mK −1 and softening the perovskite layer, reducing the Young''s modulus from 50 to 42 GPa. The optimized ...
The selected support materials of either expanded polyethylene foam (EPE foam), galvanized steel grade 200 (steel) or aluminum alloy 6063 (aluminum) typically represented low [17], [52], [53], moderate and high thermally conductive mediums, where the average thermal conductivity was 0.036, 56.0 and 209.5 W m −1 K −1, respectively (Fig. 2 b ...
Here, we report a solid–solid phase change material, tris (hydroxymethyl)aminomethane (TRIS), which has a phase change temperature of 132 °C in the medium temperature range, enabling …
In addition, the decoration of Ni nanoparticles on the rGO support (i.e., NF/Ni@rGO-10) could further improve the thermal conductivity, solar-thermal conversion efficiency (95.74 %) and electro-thermal conversion efficiency (71.39 %) of CPCMs. This research furnishes the basis for the development of high performance CPCMs.
The exploitation of deep geothermal resources is mainly constrained by drilling techniques and costs. At present, the largest depth of wells drilled across the world is over 10 km (Kozlovsky, 1984).Some oil and gas wells in the Tarim Basin of China are completed at a depth of over 9.3 km, indicating that, technically, it is fully capable of drilling geothermal wells to a depth …
China is committed to the targets of achieving peak CO2 emissions around 2030 and realizing carbon neutrality around 2060. To realize carbon neutrality, people are seeking to replace fossil fuel with renewable energy. Thermal energy storage is the key to overcoming the intermittence and fluctuation of renewable energy utilization. In this paper, the relation between …
Notice on Holding the 2024 China Solar Thermal Power Generation Conference (Second Round) Chairperson''s Invitation for SolarPACES 2024 Welcome to SolarPACES 2024
Perovskite solar cells (PSCs) have emerged as one of the most promising photovoltaic devices since 2009 due to the long carrier diffusion lengths and high carrier transport dynamics, etc. [1], [2], [3].The highest power conversion efficiency (PCE) beyond 26.1% has been reported for single-cell devices, approaching that of the crystalline silicon solar cells [4].
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