Visualization research on high efficiency and low NOx combustion technology with multiple air-staged and large angle counter flow of fuel-rich jet

2010 ◽  
Author(s):  
Y. Y. Li ◽  
Y. Li ◽  
Z. C. Lin ◽  
W. D. Fan ◽  
M. C. Zhang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Large Angle ◽  
Counter Flow ◽  
Combustion Technology ◽  
Low Nox Combustion

The Large Capacity Pulverized Coal Fired Utility Boiler and the Low NOx Combustion Technology Developments in China in Response to Environmental Challenges

2011 ◽  
Author(s):  
Hao Zhou ◽  
Guiyuan Mo ◽  
Kefa Cen
Keyword(s):  
High Efficiency ◽  
Catalytic Reduction ◽  
Pulverized Coal ◽  
Large Capacity ◽  
Environmental Challenges ◽  
Utility Boiler ◽  
Integrated Technology ◽  
Combustion Technology ◽  
Low Nox Combustion ◽  
Scr System

Large capacity pulverized coal fired utility boiler technology is in quick developments in China, hundreds of super critical boilers have been constructed in the last several years which can achieve high efficiency and low pollutants emissions. The different types of super critical boilers are introduced in this paper, they include the single-furnace with double fireball corner fired furnace, the wall fired furnace and the tower-type furnace. The low NOx combustion technologies have been widely used to face the environmental challenges. The low NOx technologies employed in pulverized-coal boilers consist of the combustion modification and post-combustion technology. The low NOx combustion modification technology includes the low NOx burner, close coupled over fire air (CCOFA) and separated over fire air (SOFA). The post-combustion technology consists of selective non-catalytic reduction (SNCR) and selective catalytic reduction (SCR) technologies. Zhejiang University develops integrated low NOx technology, including the low NOx combustion system, SNCR system and SCR system. This integrated technology can reduce the NOx emissions to be lower than 50 mg/Nm3.

Rectangular dielectric metagrating for high-efficiency diffraction with large-angle deflection

2020 ◽  
Vol 18 (7) ◽  
pp. 073601
Author(s):  
Weiyi Shi ◽  
Weimin Deng ◽  
Weinan Liu ◽  
Zepeng Zhuang ◽  
Zhibin Fan ◽  
...  
Keyword(s):  
High Efficiency ◽  
Large Angle

scholarly journals Diffractive Optical Elements with a Large Angle of Operation Recorded in Acrylamide Based Photopolymer on Flexible Substrates

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Hoda Akbari ◽  
Izabela Naydenova ◽  
Lina Persechini ◽  
Sean M. Garner ◽  
Pat Cimo ◽  
...  
Keyword(s):  
Spatial Frequency ◽  
High Efficiency ◽  
Large Angle ◽  
Optical Recording ◽  
Holographic Recording ◽  
Angular Range ◽  
Optical Elements ◽  
Lens Element ◽  
Single Lens ◽  
Exposure Energy

A holographic device characterised by a large angular range of operation is under development. The aim of this study is to increase the angular working range of the diffractive lens by stacking three layers of high efficiency optical elements on top of each other so that light is collected (and focussed) from a broader range of angles. The angular range of each individual lens element is important, and work has already been done in an acrylamide-based photosensitive polymer to broaden the angular range of individual elements using holographic recording at a low spatial frequency. This paper reports new results on the angular selectivity of stacked diffractive lenses. A working range of 12° is achieved. The diffractive focussing elements were recorded holographically with a central spatial frequency of 300 l/mm using exposure energy of 60 mJ/cm2at a range of recording angles. At this spatial frequency with layers of thickness 50 ± 5 µm, a diffraction efficiency of 80% and 50% was achieved in the single lens element and combined device, respectively. The optical recording process and the properties of the multilayer structure are described and discussed. Holographic recording of a single lens element is also successfully demonstrated on a flexible glass substrate (Corning(R) Willow(R) Glass) for the first time.

scholarly journals High-efficiency large-angle Pancharatnam phase deflector based on dual-twist design

2017 ◽  
Vol 25 (6) ◽  
pp. 6283 ◽  
Author(s):  
Kun Gao ◽  
Colin McGinty ◽  
Harold Payson ◽  
Shaun Berry ◽  
Joseph Vornehm ◽  
...  
Keyword(s):  
High Efficiency ◽  
Large Angle ◽  
Pancharatnam Phase

scholarly journals Large-angle and high-efficiency tunable phase grating using fringe field switching liquid crystal

2015 ◽  
Vol 23 (9) ◽  
pp. 12274 ◽  
Author(s):  
Daming Xu ◽  
Guanjun Tan ◽  
Shin-Tson Wu
Keyword(s):  
Liquid Crystal ◽  
High Efficiency ◽  
Large Angle ◽  
Fringe Field ◽  
Phase Grating

Research of Low NOxCombustion with Large-Angle Counter Flow of a Fuel-Rich Jet and Its Particle-Dynamics Anemometer (PDA) Experiment

2009 ◽  
Vol 23 (2) ◽  
pp. 744-753 ◽  
Author(s):  
Zhengchun Lin ◽  
Weidong Fan ◽  
Youyi Li ◽  
Yuehua Li ◽  
Mingchuan Zhang
Keyword(s):  
Large Angle ◽  
Particle Dynamics ◽  
Counter Flow

scholarly journals Mid-infrared large-angle high-efficiency retroreflector based on subwavelenght metallic metagrating

2020 ◽  
Vol 69 (1) ◽  
pp. 014211
Author(s):  
Mei-Ou Wang ◽  
Qian Xiao ◽  
Xia Jin ◽  
Yan-Yan Cao ◽  
Ya-Dong Xu
Keyword(s):  
High Efficiency ◽  
Large Angle ◽  
Mid Infrared

scholarly journals Development of Low NOx Combustion Technology in Coke Oven

2004 ◽  
Vol 83 (11) ◽  
pp. 882-888 ◽  
Author(s):  
Shuhei YOSHIDA ◽  
Shoji TAKASE ◽  
Makoto UCHIDA ◽  
Takafumi SAJI ◽  
Hiroyuki KOYAMA ◽  
...  
Keyword(s):  
Coke Oven ◽  
Combustion Technology ◽  
Low Nox Combustion
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