scholarly journals Cold test with a benchtop set-up for fluidized bed reactor using quartz sand to simulate gasification of coal cokes by concentrated solar radiation

2016 ◽  
Author(s):  
Nobuyuki Gokon ◽  
Tomoaki Tanabe ◽  
Tadaaki Shimizu ◽  
Tatsuya Kodama
Keyword(s):  
Solar Radiation ◽  
Fluidized Bed ◽  
Quartz Sand ◽  
Fluidized Bed Reactor ◽  
Cold Test ◽  
Concentrated Solar Radiation ◽  
Set Up

scholarly journals Fabrication and performance analysis of concentrated hybrid photovoltaic system

2018 ◽  
Vol 144 ◽  
pp. 04023
Author(s):  
Krishna Murthy ◽  
Ajay Daniel ◽  
Lanvin Concessao ◽  
Habbie Alex Roy ◽  
A. Ganesha
Keyword(s):  
Solar Radiation ◽  
Waste Heat ◽  
Cooling System ◽  
Photovoltaic System ◽  
Photovoltaic Module ◽  
Performance Study ◽  
Drastic Increase ◽  
Concentrated Solar Radiation ◽  
And Performance ◽  
Set Up

Sun is the most important source of renewable source of energy. During the past few decades there has been an ever-increasing interest in Photovoltaic (PV) cells as it directly converts solar radiation into electricity. This paper involves the performance study of photovoltaic system under concentrated solar radiation. The main problem with the concentration solar energy is the drastic increase in temperature of the photovoltaic module resulting in a decrease in performance efficiency of the system. This problem of overheating of the system can be overcome by providing cooling which would ensure operation of the module in the optimal temperature range. Hence, the setup would function as a hybrid model serving the dual purpose of power generation while also utilizing the waste heat for water heating applications. The experimental set up consist of a novel arrangement of concentrator and reflector and the cooling system. The Hybrid Photovoltaic System was repeatedly tested under real time conditions on several days. A comparison was drawn between the results obtained from direct exposure of a standard photovoltaic module to that obtained from the hybrid system in order to better understand the improvement in performance parameters. The study shown a significant improvement of output of standard photovoltaic module under the concentrated solar radiation.

Study on Fluidization Characteristics of Chinese Herbal Medicine Waste in a Fluidized Bed Reactor

2011 ◽  
Vol 138-139 ◽  
pp. 952-957 ◽  
Author(s):  
Tie Mi ◽  
Xin Ming Yu
Keyword(s):  
Herbal Medicine ◽  
Fluidized Bed ◽  
Chinese Herbal Medicine ◽  
Quartz Sand ◽  
Scale Up ◽  
Chinese Herbal ◽  
Fluidized Bed Gasifier ◽  
Set Up ◽  
Biomass Particles ◽  
Reliable Scale

Large amounts of Chinese herbal medicine wastes (CHMW) are produced in the process of processing and manufacturing traditional Chinese crude medicines. For CHMW, gasification in fluidized bed is a promising option. But, it is the difficult to fluidize CHMW particles alone in fluidized bed gasifier, especially for various size and shape of CHMW particles. It is very common to fluidize these kinds of biomass particles with sand, gives better defined fluidization behavior and a more reliable scale-up. However, not much is known about fluidization behavior of CHMW particles in fluidized bed. Therefore, a fluidized bed and its air distribution were designed and set up, the experimental study on fluidization characteristic of CHMW was done in the fluidize bed. Minimum fluidization velocity and the effect of bed height of CHMW/quartz sand mixtures on fluidization properties in air have been experimentally determined. The results showed that good fluidized could achieve with the additional of quartz sand. The results will be in favorite design and operation of CHMW gasification in fluidized bed.

Experimental design of a fluidized bed solar receiver with direct absorption of concentrated solar radiation

2008 ◽  
Author(s):  
Arezki Bounaceur ◽  
Jean Jacques Bezian ◽  
Alain de Ryck ◽  
Jean Claude Poussin ◽  
Gabriel Olalde
Keyword(s):  
Experimental Design ◽  
Solar Radiation ◽  
Fluidized Bed ◽  
Direct Absorption ◽  
Concentrated Solar Radiation ◽  
Solar Receiver

Development of a 5kWth internally circulating fluidized bed reactor containing quartz sand for continuously-fed coal-coke gasification and a beam-down solar concentrating system

Energy ◽  
2019 ◽  
Vol 166 ◽  
pp. 1-16 ◽  
Author(s):  
Nobuyuki Gokon ◽  
Satoshi Kumaki ◽  
Yosuke Miyaguchi ◽  
Selvan Bellan ◽  
Tatsuya Kodama ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Quartz Sand ◽  
Circulating Fluidized Bed ◽  
Fluidized Bed Reactor

Photocatalytic reduction of Cr(VI) in a fully illuminated fluidized bed reactor

2011 ◽  
Vol 64 (12) ◽  
pp. 2370-2375
Author(s):  
R. L. Pozzo ◽  
L. O. Conte ◽  
J. L. Giombi ◽  
M. A. Baltanás
Keyword(s):  
Oxalic Acid ◽  
Dicarboxylic Acid ◽  
Fluidized Bed ◽  
Quartz Sand ◽  
Heterogeneous System ◽  
Fluidized Bed Reactor ◽  
Photocatalytic Reduction ◽  
Time Intervals ◽  
Sacrificial Agent ◽  
Water Pollutant

The potential of a fluidized bed reactor for the UV-A photocatalytic reduction of Cr(VI), a priority water pollutant, by utilizing a TiO2/quartz sand composite, was explored. The effects of oxalic acid (OA) as a sacrificial agent in the heterogeneous system was also investigated and compared with the homogeneous photoreduction by the same dicarboxylic acid under both oxygenated or anoxic conditions of the reacting media. The performance of the ‘preconditioned’ photocatalyst, either by pretreating it with the OA solution (at dark or under UV-A illumination) or by letting the catalyst stand wet with the OA solution, during designated time intervals (1–5 weeks) prior to its reuse, was assessed. Then, up to 95% reduction of Cr(VI) to Cr(III) was achieved in less than 100 min.

Removal of microcystin-LR from drinking water with TiO2-coated activated carbon

2004 ◽  
Vol 4 (5-6) ◽  
pp. 21-28
Author(s):  
S.-C. Kim ◽  
D.-K. Lee
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Synergistic Effect ◽  
Fluidized Bed ◽  
Continuous Flow ◽  
High Surface ◽  
High Surface Area ◽  
Fluidized Bed Reactor ◽  
Exterior Surface ◽  
Tio2 Particles

TiO2-coated granular activated carbon was employed for the removal of toxic microcystin-LR from water. High surface area of the activated carbon provided sites for the adsorption of microcystin-LR, and the adsorbed microcystin-LR migrated continuously onto the surface of TiO2 particles which located mainly at the exterior surface in the vicinity of the entrances of the macropores of the activated carbon. The migrated microcystin-LR was finally degraded into nontoxic products and CO2 very quickly. These combined roles of the activated carbon and TiO2 showed a synergistic effect on the efficient degradation of toxic microcystin-LR. A continuous flow fluidized bed reactor with the TiO2-coated activated carbon could successfully be employed for the efficient photocatalytic of microcystin-LR.

Influence of Seeding Conditions on Initial Biofilm Development during the Startup of Anaerobic Fluidized Bed Reactors

1989 ◽  
Vol 21 (4-5) ◽  
pp. 157-165 ◽  
Author(s):  
F. Ehlinger ◽  
J. M. Audic ◽  
G. M. Faup
Keyword(s):  
Fluidized Bed ◽  
Future Development ◽  
Protein Concentration ◽  
Specific Activity ◽  
Fluidized Bed Reactor ◽  
Fluidized Bed Reactors ◽  
Support Material ◽  
Biofilm Development ◽  
Initial Biofilm

The characterization of the biofilm of an anaerobic fluidized-bed reactor was completed under standard conditions. The distribution of the fixed protein concentration depended on the level in the reactor. The protein concentration reached 1520 µg.g−1 of support at the top of the reactor and only 1200 µg.g−1 at the bottom after 504 hours of operation but the specific activity of the biofilm was 33×10−4 µM acetate.h−1.mg−1 proteins at the bottom and only 26×10−4 µM.h−1.mg−1 at the top. The efficiency of a fluidized bed reactor and the composition of the biofilm changed with an increase of the pH from 7 to 8.5 during the seeding of the support material. Future development of the biofilm and the specific activity of the support were affected.

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