A novel iron aluminate composite polymer particle for high-efficiency self-coating solar heat reflection

2021 ◽  
Vol 230 ◽  
pp. 111248
Author(s):  
Jittipat Omsinsombon ◽  
Amorn Chaiyasat ◽  
Chumphol Busabok ◽  
Preeyaporn Chaiyasat
Keyword(s):  
High Efficiency ◽  
Polymer Particle ◽  
Composite Polymer ◽  
Solar Heat ◽  
Composite Polymer Particle

Experimental Investigation of a New Flat Plate Solar Heat Collector by Micro Heat Pipe Array

2010 ◽  
Author(s):  
Yao-Hua Zhao ◽  
Fei-Long Zou ◽  
Yan-Hua Diao ◽  
Zhen-Hua Quan
Keyword(s):  
Flat Plate ◽  
Heat Pipe ◽  
High Efficiency ◽  
Heat Pipes ◽  
Total Heat Loss ◽  
Solar Heat ◽  
Solar Water ◽  
Micro Heat Pipe ◽  
Heat Collector ◽  
Micro Heat Pipes

The performance of a new flat plate solar heat collector with perfect combination of high efficiency and low cost is investigated experimentally. The new system described in this study uses a novel micro heat pipe array as a key component for the system. One such flat plate heat collector contains over 300 micro heat pipes per 1m2 and the hydraulic diameter of the micro heat pipes is 0.4–1.0mm. A detailed heat transfer experimental study is conducted during daylight hours over several months, focusing on the collector efficiency and overall efficiency of the system as well as total heat loss factor. The results show that the collector’s maximum instantaneous efficiency is up to 88%. Compared with conventional evacuated glass tube solar water heater, the system offers the additional benefits of high pressure resistance, low weight, good reliability and durability, easy integration into buildings and absence of freezing during winter months. Besides, compared with traditional flat-plate solar water system which is mainly sheet-and-tube concept, the system also shows many advantages: higher efficiency, much cheaper, absence of tube-bonding and freezing etc. Therefore, the system proposes a unique substitute to common solar water heating systems.

Polysiloxane–poly(vinyl alcohol) composite dielectrics for high-efficiency low voltage organic thin film transistors

2019 ◽  
Vol 7 (16) ◽  
pp. 4879-4886 ◽  
Author(s):  
Jupeng Cao ◽  
Xiaoyun Wei ◽  
Yuxuan Che ◽  
Aiyuan Li ◽  
Yaowu He ◽  
...  
Keyword(s):  
Thin Film ◽  
Vinyl Alcohol ◽  
Thin Film Transistors ◽  
Solution Method ◽  
High Efficiency ◽  
Low Voltage ◽  
Organic Thin Film Transistors ◽  
Poly Vinyl Alcohol ◽  
Organic Thin Film ◽  
Composite Polymer

The strategy of composite polymer dielectrics for low consumption-high efficiency organic thin film transistors via the solution method.

scholarly journals High-efficiency solar heat storage enabled by adaptive radiation management

2021 ◽  
pp. 100533
Author(s):  
Rong Liu ◽  
Jia Li ◽  
Jiangjiang Duan ◽  
Boyang Yu ◽  
Wenke Xie ◽  
...  
Keyword(s):  
Adaptive Radiation ◽  
High Efficiency ◽  
Heat Storage ◽  
Solar Heat ◽  
Radiation Management

Use of Low/Mid-Temperature Solar Heat for Thermochemical Upgrading of Energy, With Application to a Novel Chemically-Recuperated Gas-Turbine Power Generation (SOLRGT) System

2009 ◽  
Author(s):  
Na Zhang ◽  
Noam Lior
Keyword(s):  
Power Generation ◽  
Gas Turbine ◽  
Thermal Energy ◽  
Fossil Fuel ◽  
High Efficiency ◽  
Solar Thermal ◽  
Working Fluid ◽  
Solar Thermal Energy ◽  
Solar Heat ◽  
Overall Efficiency

This paper presents the concept of indirect thermochemical upgrading of low/mid temperature solar heat, and demonstration of its integration into a high efficiency novel hybrid power generation system. The proposed system consists of an intercooled chemically recuperated gas turbine (SOLRGT) cycle, in which the solar thermal energy collected at about 220°C is first transformed into the latent heat of vapor supplied to a reformer and then via the reforming reactions to the produced syngas chemical exergy. The produced syngas is burned to provide high temperature working fluid to a gas turbine. The solar-driven steam production helps to improve both the chemical and thermal recuperation in the system. Using well established technologies including steam reforming and low/mid temperature solar heat collection, the hybrid system exhibits promising performance: the net solar-to-electricity efficiency, based on the gross solar thermal energy incident on the collector, was predicted to be 25–30%, and it can reach up to 35% when the solar share is reduced. In comparison to conventional CRGT system, 30% of fossil fuel saving is feasible with the solar thermal share of 26%, and the system overall efficiency reaches 51.2% to 53.6% when the solar thermal share is increased from 11 to 28.8%. The overall efficiency is about 5.7%-points higher than that of a comparable intercooled CRGT system without solar assist. Due to the introduction of steam into the combustion chamber, production of NOx is near zero, and the reduction of fossil fuel use results in a commensurate 23% reduction of CO2 emissions as compared with the comparable intercooled CRGT system without solar assist.

scholarly journals Fabrication of Epoxide Functional Hydrophobic Composite Polymer Particles by Suspension Polymerization and Subsequent Doping with Fe3O4 Nanoparticles

2017 ◽  
Vol 9 (3) ◽  
pp. 329-339
Author(s):  
R. Shabnam ◽  
M. A. Rahman ◽  
M. A. J. Miah ◽  
M. K. Sharafat ◽  
H. M. T. Islam ◽  
...  
Keyword(s):  
Fe3o4 Nanoparticles ◽  
Suspension Polymerization ◽  
Polymer Particle ◽  
Magnetic Composite ◽  
Composite Polymer ◽  
X Ray Diffraction ◽  
Polymer Particles ◽  
X Ray ◽  
Composite Polymer Particles ◽  
Co Precipitation

This investigation described a simple three-step process for the fabrication of micrometer-sized magnetic composite polymer particles. This composite polymer particle consisted of crosslinked hydrophobic poly(lauryl methacrylate-divinyl benzene) (P(LMA-DVB)) core, prepared by suspension polymerization. Then, P(LMA-DVB) copolymer core particles were coated with poly(glycidyl methacrylate) (PGMA) by seeded polymerization to introduce epoxide functionality. Finally, P(LMA-DVB)/PGMA composite particles were doped with iron oxide (Fe3O4) nanoparticles following in situ co-precipitation of Fe2+ and Fe3+ from their alkali aqueous solution. The presence of strained oxirane ring derived from PGMA segment present at the surface is expected to induce high affinity towards precipitated magnetic Fe3O4 nanoparticles. The compositional structure of P(LMA-DVB)/PGMA/Fe3O4 composite polymer particles was confirmed by Fourier Transform IR (FTIR), electron microscopy, thermogravimetry (TG), X-ray diffraction (XRD) and energy-dispersive X-ray (EDX).

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