The Experts below are selected from a list of 117 Experts worldwide ranked by ideXlab platform
Zhengguo Zhang - One of the best experts on this subject based on the ideXlab platform.
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optical absorption Property and photo Thermal conversion performance of graphene oxide water nanofluids with excellent dispersion stability
Solar Energy, 2017Co-Authors: Leilei Chen, Chao Xu, Xiaoming Fang, Zhengguo ZhangAbstract:Abstract Graphene oxide (GO) dispersed nanofluids were first explored to be used as working fluids for direct absorption solar collectors. The stability, optical absorption Property, Thermal-Physical Property and photo-Thermal conversion performance of the GO/water nanofluids with different mass fractions of GO were symmetrically investigated. The sedimentation experiment and Zeta potential (ζ) analysis showed that the GO/water nanofluids not only possess excellent long-term stability but also keep stable at elevated temperatures. A remarkable enhancement in optical absorption Property was observed for the GO/water nanofluids due to the dispersion of GO into water. The GO/water nanofluids exhibited an obvious improvement in Thermal conductivity as compared with water. The photo-Thermal conversion performance of the GO/water nanofluids were higher than that of water, and the highest efficiency was achieved by the one containing 0.02% of GO, which was 97.45% at 30 °C and 48.92% at 80 °C. The GO/water nanofluids with excellent dispersion stability, good optical absorption Property and photo-Thermal performance show great promise for use as the working fluids in low temperature direct absorption solar collectors.
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Graphite nanoparticles-dispersed paraffin/water emulsion with enhanced Thermal-Physical Property and photo-Thermal performance
Solar Energy Materials and Solar Cells, 2016Co-Authors: Fangxian Wang, Xiaoming Fang, Jian Liu, Zhengguo ZhangAbstract:Abstract In this paper, graphite nanoparticles have been dispersed into a paraffin/water emulsion with the purpose of improving the Thermal conductivity and photoThermal conversion performance of the emulsion. The melting enthalpy and apparent specific heat of 20 wt% paraffin/water emulsion is 39.2 J g − 1 and 9.105 J g −1 K −1 and its melting and freezing temperatures are very close to those of paraffin. Moreover, the 300 heating–cooling cycles test indicates that the paraffin/water emulsions containing 0.1 wt% graphite exhibits good Thermal reliability. The viscosities of all samples are lower than 0.0750 Pa s, meeting the transportablilty requirements in pump systems for applications. In addition, the Thermal conductivity of the emulsion containing 0.1 wt% graphite increases by 20.0% as compared to the base fluid and its receiver efficiency is higher than 86.0% as the temperature ranges from room temperature to 80 °C. As a result, the paraffin/water emulsion containing graphite with high energy storage capacity, enhanced Thermal conductivity and excellent photo-Thermal performance, good Thermal reliability and good fluidity shows great potential for use as advanced heat transfer fluid (HTF) in the low temperature applications of direct absorption solar collector (DASCs).
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graphite nanoparticles dispersed paraffin water emulsion with enhanced Thermal Physical Property and photo Thermal performance
Solar Energy Materials and Solar Cells, 2016Co-Authors: Fangxian Wang, Xiaoming Fang, Jian Liu, Zhengguo ZhangAbstract:Abstract In this paper, graphite nanoparticles have been dispersed into a paraffin/water emulsion with the purpose of improving the Thermal conductivity and photoThermal conversion performance of the emulsion. The melting enthalpy and apparent specific heat of 20 wt% paraffin/water emulsion is 39.2 J g−1 and 9.105 J g−1 K−1 and its melting and freezing temperatures are very close to those of paraffin. Moreover, the 300 heating–cooling cycles test indicates that the paraffin/water emulsions containing 0.1 wt% graphite exhibits good Thermal reliability. The viscosities of all samples are lower than 0.0750 Pa s, meeting the transportablilty requirements in pump systems for applications. In addition, the Thermal conductivity of the emulsion containing 0.1 wt% graphite increases by 20.0% as compared to the base fluid and its receiver efficiency is higher than 86.0% as the temperature ranges from room temperature to 80 °C. As a result, the paraffin/water emulsion containing graphite with high energy storage capacity, enhanced Thermal conductivity and excellent photo-Thermal performance, good Thermal reliability and good fluidity shows great potential for use as advanced heat transfer fluid (HTF) in the low temperature applications of direct absorption solar collector (DASCs).
Xiaoming Fang - One of the best experts on this subject based on the ideXlab platform.
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optical absorption Property and photo Thermal conversion performance of graphene oxide water nanofluids with excellent dispersion stability
Solar Energy, 2017Co-Authors: Leilei Chen, Chao Xu, Xiaoming Fang, Zhengguo ZhangAbstract:Abstract Graphene oxide (GO) dispersed nanofluids were first explored to be used as working fluids for direct absorption solar collectors. The stability, optical absorption Property, Thermal-Physical Property and photo-Thermal conversion performance of the GO/water nanofluids with different mass fractions of GO were symmetrically investigated. The sedimentation experiment and Zeta potential (ζ) analysis showed that the GO/water nanofluids not only possess excellent long-term stability but also keep stable at elevated temperatures. A remarkable enhancement in optical absorption Property was observed for the GO/water nanofluids due to the dispersion of GO into water. The GO/water nanofluids exhibited an obvious improvement in Thermal conductivity as compared with water. The photo-Thermal conversion performance of the GO/water nanofluids were higher than that of water, and the highest efficiency was achieved by the one containing 0.02% of GO, which was 97.45% at 30 °C and 48.92% at 80 °C. The GO/water nanofluids with excellent dispersion stability, good optical absorption Property and photo-Thermal performance show great promise for use as the working fluids in low temperature direct absorption solar collectors.
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Graphite nanoparticles-dispersed paraffin/water emulsion with enhanced Thermal-Physical Property and photo-Thermal performance
Solar Energy Materials and Solar Cells, 2016Co-Authors: Fangxian Wang, Xiaoming Fang, Jian Liu, Zhengguo ZhangAbstract:Abstract In this paper, graphite nanoparticles have been dispersed into a paraffin/water emulsion with the purpose of improving the Thermal conductivity and photoThermal conversion performance of the emulsion. The melting enthalpy and apparent specific heat of 20 wt% paraffin/water emulsion is 39.2 J g − 1 and 9.105 J g −1 K −1 and its melting and freezing temperatures are very close to those of paraffin. Moreover, the 300 heating–cooling cycles test indicates that the paraffin/water emulsions containing 0.1 wt% graphite exhibits good Thermal reliability. The viscosities of all samples are lower than 0.0750 Pa s, meeting the transportablilty requirements in pump systems for applications. In addition, the Thermal conductivity of the emulsion containing 0.1 wt% graphite increases by 20.0% as compared to the base fluid and its receiver efficiency is higher than 86.0% as the temperature ranges from room temperature to 80 °C. As a result, the paraffin/water emulsion containing graphite with high energy storage capacity, enhanced Thermal conductivity and excellent photo-Thermal performance, good Thermal reliability and good fluidity shows great potential for use as advanced heat transfer fluid (HTF) in the low temperature applications of direct absorption solar collector (DASCs).
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graphite nanoparticles dispersed paraffin water emulsion with enhanced Thermal Physical Property and photo Thermal performance
Solar Energy Materials and Solar Cells, 2016Co-Authors: Fangxian Wang, Xiaoming Fang, Jian Liu, Zhengguo ZhangAbstract:Abstract In this paper, graphite nanoparticles have been dispersed into a paraffin/water emulsion with the purpose of improving the Thermal conductivity and photoThermal conversion performance of the emulsion. The melting enthalpy and apparent specific heat of 20 wt% paraffin/water emulsion is 39.2 J g−1 and 9.105 J g−1 K−1 and its melting and freezing temperatures are very close to those of paraffin. Moreover, the 300 heating–cooling cycles test indicates that the paraffin/water emulsions containing 0.1 wt% graphite exhibits good Thermal reliability. The viscosities of all samples are lower than 0.0750 Pa s, meeting the transportablilty requirements in pump systems for applications. In addition, the Thermal conductivity of the emulsion containing 0.1 wt% graphite increases by 20.0% as compared to the base fluid and its receiver efficiency is higher than 86.0% as the temperature ranges from room temperature to 80 °C. As a result, the paraffin/water emulsion containing graphite with high energy storage capacity, enhanced Thermal conductivity and excellent photo-Thermal performance, good Thermal reliability and good fluidity shows great potential for use as advanced heat transfer fluid (HTF) in the low temperature applications of direct absorption solar collector (DASCs).
Fangxian Wang - One of the best experts on this subject based on the ideXlab platform.
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Graphite nanoparticles-dispersed paraffin/water emulsion with enhanced Thermal-Physical Property and photo-Thermal performance
Solar Energy Materials and Solar Cells, 2016Co-Authors: Fangxian Wang, Xiaoming Fang, Jian Liu, Zhengguo ZhangAbstract:Abstract In this paper, graphite nanoparticles have been dispersed into a paraffin/water emulsion with the purpose of improving the Thermal conductivity and photoThermal conversion performance of the emulsion. The melting enthalpy and apparent specific heat of 20 wt% paraffin/water emulsion is 39.2 J g − 1 and 9.105 J g −1 K −1 and its melting and freezing temperatures are very close to those of paraffin. Moreover, the 300 heating–cooling cycles test indicates that the paraffin/water emulsions containing 0.1 wt% graphite exhibits good Thermal reliability. The viscosities of all samples are lower than 0.0750 Pa s, meeting the transportablilty requirements in pump systems for applications. In addition, the Thermal conductivity of the emulsion containing 0.1 wt% graphite increases by 20.0% as compared to the base fluid and its receiver efficiency is higher than 86.0% as the temperature ranges from room temperature to 80 °C. As a result, the paraffin/water emulsion containing graphite with high energy storage capacity, enhanced Thermal conductivity and excellent photo-Thermal performance, good Thermal reliability and good fluidity shows great potential for use as advanced heat transfer fluid (HTF) in the low temperature applications of direct absorption solar collector (DASCs).
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graphite nanoparticles dispersed paraffin water emulsion with enhanced Thermal Physical Property and photo Thermal performance
Solar Energy Materials and Solar Cells, 2016Co-Authors: Fangxian Wang, Xiaoming Fang, Jian Liu, Zhengguo ZhangAbstract:Abstract In this paper, graphite nanoparticles have been dispersed into a paraffin/water emulsion with the purpose of improving the Thermal conductivity and photoThermal conversion performance of the emulsion. The melting enthalpy and apparent specific heat of 20 wt% paraffin/water emulsion is 39.2 J g−1 and 9.105 J g−1 K−1 and its melting and freezing temperatures are very close to those of paraffin. Moreover, the 300 heating–cooling cycles test indicates that the paraffin/water emulsions containing 0.1 wt% graphite exhibits good Thermal reliability. The viscosities of all samples are lower than 0.0750 Pa s, meeting the transportablilty requirements in pump systems for applications. In addition, the Thermal conductivity of the emulsion containing 0.1 wt% graphite increases by 20.0% as compared to the base fluid and its receiver efficiency is higher than 86.0% as the temperature ranges from room temperature to 80 °C. As a result, the paraffin/water emulsion containing graphite with high energy storage capacity, enhanced Thermal conductivity and excellent photo-Thermal performance, good Thermal reliability and good fluidity shows great potential for use as advanced heat transfer fluid (HTF) in the low temperature applications of direct absorption solar collector (DASCs).
Jian Liu - One of the best experts on this subject based on the ideXlab platform.
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Graphite nanoparticles-dispersed paraffin/water emulsion with enhanced Thermal-Physical Property and photo-Thermal performance
Solar Energy Materials and Solar Cells, 2016Co-Authors: Fangxian Wang, Xiaoming Fang, Jian Liu, Zhengguo ZhangAbstract:Abstract In this paper, graphite nanoparticles have been dispersed into a paraffin/water emulsion with the purpose of improving the Thermal conductivity and photoThermal conversion performance of the emulsion. The melting enthalpy and apparent specific heat of 20 wt% paraffin/water emulsion is 39.2 J g − 1 and 9.105 J g −1 K −1 and its melting and freezing temperatures are very close to those of paraffin. Moreover, the 300 heating–cooling cycles test indicates that the paraffin/water emulsions containing 0.1 wt% graphite exhibits good Thermal reliability. The viscosities of all samples are lower than 0.0750 Pa s, meeting the transportablilty requirements in pump systems for applications. In addition, the Thermal conductivity of the emulsion containing 0.1 wt% graphite increases by 20.0% as compared to the base fluid and its receiver efficiency is higher than 86.0% as the temperature ranges from room temperature to 80 °C. As a result, the paraffin/water emulsion containing graphite with high energy storage capacity, enhanced Thermal conductivity and excellent photo-Thermal performance, good Thermal reliability and good fluidity shows great potential for use as advanced heat transfer fluid (HTF) in the low temperature applications of direct absorption solar collector (DASCs).
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graphite nanoparticles dispersed paraffin water emulsion with enhanced Thermal Physical Property and photo Thermal performance
Solar Energy Materials and Solar Cells, 2016Co-Authors: Fangxian Wang, Xiaoming Fang, Jian Liu, Zhengguo ZhangAbstract:Abstract In this paper, graphite nanoparticles have been dispersed into a paraffin/water emulsion with the purpose of improving the Thermal conductivity and photoThermal conversion performance of the emulsion. The melting enthalpy and apparent specific heat of 20 wt% paraffin/water emulsion is 39.2 J g−1 and 9.105 J g−1 K−1 and its melting and freezing temperatures are very close to those of paraffin. Moreover, the 300 heating–cooling cycles test indicates that the paraffin/water emulsions containing 0.1 wt% graphite exhibits good Thermal reliability. The viscosities of all samples are lower than 0.0750 Pa s, meeting the transportablilty requirements in pump systems for applications. In addition, the Thermal conductivity of the emulsion containing 0.1 wt% graphite increases by 20.0% as compared to the base fluid and its receiver efficiency is higher than 86.0% as the temperature ranges from room temperature to 80 °C. As a result, the paraffin/water emulsion containing graphite with high energy storage capacity, enhanced Thermal conductivity and excellent photo-Thermal performance, good Thermal reliability and good fluidity shows great potential for use as advanced heat transfer fluid (HTF) in the low temperature applications of direct absorption solar collector (DASCs).
Dalei Song - One of the best experts on this subject based on the ideXlab platform.
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Thermal Physical Property based fusion of geostationary meteorological satellite visible and infrared channel images
Sensors, 2014Co-Authors: Lei Han, Lu Shi, Yiling Yang, Dalei SongAbstract:Geostationary meteorological satellite infrared (IR) channel data contain important spectral information for meteorological research and applications, but their spatial resolution is relatively low. The objective of this study is to obtain higher-resolution IR images. One common method of increasing resolution fuses the IR data with high-resolution visible (VIS) channel data. However, most existing image fusion methods focus only on visual performance, and often fail to take into account the Thermal Physical properties of the IR images. As a result, spectral distortion occurs frequently. To tackle this problem, we propose a Thermal Physical properties-based correction method for fusing geostationary meteorological satellite IR and VIS images. In our two-step process, the high-resolution structural features of the VIS image are first extracted and incorporated into the IR image using regular multi-resolution fusion approach, such as the multiwavelet analysis. This step significantly increases the visual details in the IR image, but fake Thermal information may be included. Next, the Stefan-Boltzmann Law is applied to correct the distortion, to retain or recover the Thermal infrared nature of the fused image. The results of both the qualitative and quantitative evaluation demonstrate that the proposed Physical correction method both improves the spatial resolution and preserves the infrared Thermal properties.