Spectral Control of Thermal Radiation Using Metal-Dielectric Multilayers for High-Temperature Usage Over 1000°C

2016 ◽  
Author(s):  
Makoto Shimizu ◽  
Asaka Kohiyama ◽  
Fumitada Iguchi ◽  
Hiroo Yugami
Keyword(s):  
Thermal Radiation ◽  
High Efficiency ◽  
Radiation Spectrum ◽  
Layer Structure ◽  
Short Wavelength Range ◽  
Coating Technology ◽  
Selective Coating ◽  
Spectrally Selective ◽  
Spectral Control ◽  
Layer Coating

The spectrally selective coating technology which can be applicable for solar-thermophotovoltaic (solar-TPV) generation systems is described in this paper. In solar-TPV system, the spectrally selective absorber plays a key role to obtain high-efficiency. The technologies of controlling thermal radiation spectrum at temperature over 1000°C, however, have not been established yet. We focus on metal-dielectric multi-layer coating. This selective coating shows enormously high absorptance at short wavelength range and sharp cutoff property. Thermal stability test confirms that this multi-layer structure can be one of the candidates for the selective coatings for solar-TPV systems.

A Solar Thermophotovoltaic System Using Spectrally Controlled Monolithic Planar Thermal Emitter/Absorber

2016 ◽  
Author(s):  
Hiroo Yugami ◽  
Asaka Kohiyama ◽  
Makoto Shimizu ◽  
Fumitada Iguchi
Keyword(s):  
Thermal Radiation ◽  
High Efficiency ◽  
Radiation Spectrum ◽  
Spectral Response ◽  
Storage System ◽  
Radiation Energy ◽  
System Efficiency ◽  
Lower Efficiency ◽  
Pv Cell ◽  
Thermal Emitter

Solar-thermophotovoltaic system is expected to have high efficiency by converting wide spectral range solar energy into useful thermal radiation energy. However, the experimental STPV system shows much lower efficiency than theoretical one. To achieve high-efficiency, it is essential to obtain good spectrally matching between thermal radiation spectrum and PV cells spectral response. In this paper, the power generation tests using the whole configuration of the STPV system is described. The conversion efficiency of GaSb PV cell is estimated to be 20 to 23% against to the light intensity irradiated on the PV cell surface. The net system efficiency of 1.9% can be achieved. The application of thermal storage system to the STPV is also considered.

scholarly journals Incandescent Light Bulbs Based on a Refractory Metasurface

Photonics ◽  
2019 ◽  
Vol 6 (4) ◽  
pp. 105
Author(s):  
Hirofumi Toyoda ◽  
Kazunari Kimino ◽  
Akihiro Kawano ◽  
Junichi Takahara
Keyword(s):  
Thermal Radiation ◽  
Light Source ◽  
High Efficiency ◽  
Resonant Peak ◽  
Light Bulb ◽  
Incandescent Light ◽  
Hafnium Nitride ◽  
Radiative Power ◽  
New Type ◽  
Spectral Control

A thermal radiation light source, such as an incandescent light bulb, is considered a legacy light source with low luminous efficacy. However, it is an ideal energy source converting light with high efficiency from electric power to radiative power. In this work, we evaluate a thermal radiation light source and propose a new type of filament using a refractory metasurface to fabricate an efficient light bulb. We demonstrate visible-light spectral control using a refractory metasurface made of tantalum with an optical microcavity inserted into an incandescent light bulb. We use a nanoimprint method to fabricate the filament that is suitable for mass production. A 1.8 times enhancement of thermal radiation intensity is observed from the microcavity filament compared to the flat filament. Then, we demonstrate the thermal radiation control of the metasurface using a refractory plasmonic cavity made of hafnium nitride. A single narrow resonant peak is observed at the designed wavelength as well as the suppression of thermal radiation in wide mid-IR range under the condition of constant surface temperature.

Sprayable PEDOT:PSS based spectrally selective coating for solar energy harvesting

2021 ◽  
Vol 221 ◽  
pp. 110906
Author(s):  
N. Selvakumar ◽  
G. Karthik ◽  
Swetha Jayaraj ◽  
Harish C. Barshilia
Keyword(s):  
Energy Harvesting ◽  
Solar Energy ◽  
Selective Coating ◽  
Spectrally Selective ◽  
Solar Energy Harvesting

Solar Thermophotovoltaic Converters Based on Tungsten Emitters

2006 ◽  
Vol 129 (3) ◽  
pp. 298-303 ◽  
Author(s):  
V. M. Andreev ◽  
A. S. Vlasov ◽  
V. P. Khvostikov ◽  
O. A. Khvostikova ◽  
P. Y. Gazaryan ◽  
...  
Keyword(s):  
Band Gap ◽  
High Efficiency ◽  
Radiation Spectrum ◽  
Cost Effective ◽  
Fresnel Lens ◽  
Photocurrent Density ◽  
Back Side ◽  
High Concentration ◽  
Emitter System ◽  
Solar Powered

Results of a solar thermophotovoltaic (STPV) system study are reported. Modeling of the STPV module performance and the analysis of various parameters influencing the system are presented. The ways for the STPV system efficiency to increase and their magnitude are considered such as: improvement of the emitter radiation selectivity and application of selective filters for better matching the emitter radiation spectrum and cell photoresponse; application of the cells with a back side reflector for recycling the sub-band gap photons; and development of low-band gap tandem TPV cells for better utilization of the radiation spectrum. Sunlight concentrator and STPV modules were designed, fabricated, and tested under indoor and outdoor conditions. A cost-effective sunlight concentrator with Fresnel lens was developed as a primary concentrator and a secondary quartz meniscus lens ensured the high concentration ratio of ∼4000×, which is necessary for achieving the high efficiency of the concentrator–emitter system owing to trap escaping radiation. Several types of STPV modules have been developed and tested under concentrated sunlight. Photocurrent density of 4.5A∕cm2 was registered in a photoreceiver based on 1×1cm2GaSb cells under a solar powered tungsten emitter.

Sewage-free preparation of 2D metal oxides by a rapid freezing soft template method for extraordinarily activating solar-driven humidity VOC combustion

2021 ◽  
Author(s):  
Dachao Yuan ◽  
Luping Ma ◽  
Jianguo Zhao ◽  
Xianhua Bai ◽  
Jianchang Li ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Combustion Efficiency ◽  
Soft Template ◽  
Template Method ◽  
Rapid Freezing ◽  
Selective Coating ◽  
Spectrally Selective ◽  
Voc Combustion

2D Co3O4 can be synthesized without producing sewage, which shows a nearly 100% ambient sunlight irradiated combustion efficiency for formaldehyde, CH4, acetone, CO, as it assisted by spectrally selective coating.

Sintering and Hot-Pressing of Ti2AlC Obtained by SHS Process

2010 ◽  
Vol 63 ◽  
pp. 282-286 ◽  
Author(s):  
Leszek Chlubny ◽  
Jerzy Lis ◽  
Mirosław M. Bućko
Keyword(s):  
Hot Pressing ◽  
High Efficiency ◽  
Layer Structure ◽  
Low Cost ◽  
Max Phases ◽  
Fine Powders ◽  
High Temperature Synthesis ◽  
Low Energy Consumption ◽  
Potential Applications ◽  
Xrd Method

Some of ternary materials in the Ti-Al-C system are called MAX-phases and are characterised by heterodesmic layer structure. Their specific structure consisting of covalent and metallic chemical bonds influence its semi-ductile features locating them on the boundary between metals and ceramics, which may lead to many potential applications, for example as a part of a ceramic armour. Ti2AlC is one of this nanolaminate materials. Self-propagating High-temperature Synthesis (SHS) was applied to obtain sinterable powders of Ti2AlC Utilization of heat produced in exothermal reaction in adiabatic conditions to sustain process until all substrates are transformed into product is one of the advantages of the method that result in low energy consumption and low cost combined with high efficiency. Different substrates were used to produce fine powders of ternary material. Phase compositions of obtained powder were examined by XRD method. Than selected powders were used for sintering in various temperature both in a presureless sintering and hot-pressing in argon atmosphere. Properties and phase composition of obtained products were examined.

Thermometry of microwave discharge in powder mixtures by the thermal radiation spectrum

2008 ◽  
Vol 46 (1) ◽  
pp. 124-130 ◽  
Author(s):  
G. M. Batanov ◽  
N. K. Berezhetskaya ◽  
V. A. Kop’ev ◽  
I. A. Kossyi ◽  
A. N. Magunov
Keyword(s):  
Thermal Radiation ◽  
Microwave Discharge ◽  
Radiation Spectrum ◽  
Powder Mixtures ◽  
Thermal Radiation Spectrum
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