30.3: Discharge Characteristics of High Efficiency Rib and its Optimized Electrodes (HERO) using High Xe Gas Mixture.

2004 ◽  
Vol 35 (1) ◽  
pp. 1030 ◽  
Author(s):  
K. D. Kang ◽  
J. I. Kwon ◽  
W. T. Kim ◽  
H. S. Yoo ◽  
S. G. Woo ◽  
...  
Keyword(s):  
High Efficiency ◽  
Gas Mixture ◽  
Discharge Characteristics

scholarly journals Influence of Casting Solvents on CO2/CH4 Separation Using Polysulfone Membranes

Membranes ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 286
Author(s):  
Roba M. Almuhtaseb ◽  
Ahmed Awadallah-F ◽  
Shaheen A. Al-Muhtaseb ◽  
Majeda Khraisheh
Keyword(s):  
High Efficiency ◽  
In Situ Synthesis ◽  
Separation Process ◽  
Polymeric Membranes ◽  
Gas Mixture ◽  
Manufacturing Cost ◽  
Binary Gas Mixture ◽  
Maximum Permeability ◽  
Polysulfone Membranes

Polysulfone membranes exhibit resistance to high temperature with low manufacturing cost and high efficiency in the separation process. The composition of gases is an important step that estimates the efficiency of separation in membranes. As membrane types are currently becoming in demand for CO2/CH4 segregation, polysulfone will be an advantageous alternative to have in further studies. Therefore, research is undertaken in this study to evaluate two solvents: chloroform (CF) and tetrahydrofuran (THF). These solvents are tested for casting polymeric membranes from polysulfone (PSF) to separate every single component from a binary gas mixture of CO2/CH4. In addition, the effect of gas pressure was conducted from 1 to 10 bar on the behavior of the permeability and selectivity. The results refer to the fact that the maximum permeability of CO2 and CH4 for THF is 62.32 and 2.06 barrer at 1 and 2 bars, respectively. Further, the maximum permeability of CF is 57.59 and 2.12 barrer at 1 and 2 bars, respectively. The outcome selectivity values are 48 and 36 for THF and CF at 1 bar, accordingly. Furthermore, the study declares that with the increase in pressure, the permeability and selectivity values drop for CF and THF. The performance for polysulfone (PSF) membrane that is manufactured with THF is superior to that of CF relative to the Robeson upper bound. Therefore, through the results, it can be deduced that the solvent during in-situ synthesis has a significant influence on the gas separation of a binary mixture of CO2/CH4.

scholarly journals Numerical Simulation of a New Porous Medium Burner with Two Sections and Double Decks

Processes ◽  
2018 ◽  
Vol 6 (10) ◽  
pp. 185 ◽  
Author(s):  
Zhenzhen Jia ◽  
Qing Ye ◽  
Haizhen Wang ◽  
He Li ◽  
Shiliang Shi
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Porous Medium ◽  
Industrial Development ◽  
High Efficiency ◽  
Methane Combustion ◽  
Combustion Mechanism ◽  
Gas Mixture ◽  
Temperature And Pressure ◽  
Save Energy

Porous medium burners are characterized by high efficiency and good stability. In this study, a new burner was proposed based on the combustion mechanism of the methane-air mixture in the porous medium and the preheating effect. The new burner is a two-section and double-deck porous medium with gas inlets at both ends. A mathematical model for the gas mixture combustion in the porous medium was established. The combustion performance of the burner was simulated under different equivalence ratios and inlet velocities of premixed gas. The methane combustion degree, as well as the temperature and pressure distribution, was estimated. In addition, the concentrations of emissions of NOx for different equivalence ratios were investigated. The results show that the new burner can not only realize sufficient combustion but also save energy. Furthermore, the emission concentration of NOx is very low. This study provides new insights into the industrial development and application of porous medium combustion devices.

Use of Ceramic Injection Molding Technology to Increase Biogas Burners Efficiency

2017 ◽  
Vol 736 ◽  
pp. 127-131 ◽  
Author(s):  
V.Y. Sokolov ◽  
S.A. Naumov ◽  
A.V. Sadchikov ◽  
S.V. Mitrofanov
Keyword(s):  
Injection Molding ◽  
High Efficiency ◽  
Combustion Process ◽  
Gas Mixture ◽  
Complete Combustion ◽  
Ceramic Injection Molding

The article gives considerations to issues relating to organization of biogas combustion process. A new design of biogas burner is suggested. It differs from existing analogues by more complete combustion of air and gas mixture and high efficiency. Feasibility of greater burners' effectiveness due to the use of ceramic injection molding technology is demonstrated here.

scholarly journals Optimization of surface reflectance for silicon solar cells

2018 ◽  
Vol 69 ◽  
pp. 01008 ◽  
Author(s):  
Gagik Ayvazyan ◽  
Razmik Barseghyan ◽  
Sergey Minasyan
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Surface Recombination ◽  
Silicon Solar Cells ◽  
Black Silicon ◽  
Gas Mixture ◽  
Surface Reflectance ◽  
High Efficiency Solar Cells ◽  
Average Reflectance ◽  
Si Wafer

A study on the formation of black silicon (b-Si) antireflection layers on crystalline Si wafers using SF6/O2gas mixture in a reactive ion etching method is presented. The process is low-temperature, fast and does not depend on the crystallographic orientation of the Si wafer. The b-Si layers have demonstrated average reflectance values of 4% and 5% for monoand polycrystalline Si wafers respectively, feature that is suitable for the fabrication of high efficiency solar cells. Passivation of b-Si antireflection layers by suitable different thin films can significantly reduce needle-like surface recombination losses.

Optimizing Parameters of a High-Efficiency Steam Condenser from a Steam-Gas Mixture with a Large Content of Noncondensing Gases

2021 ◽  
Vol 68 (12) ◽  
pp. 930-935
Author(s):  
O. O. Mil’man ◽  
A. Yu. Kartuesova ◽  
V. S. Krylov ◽  
K. B. Minko ◽  
A. V. Ptakhin
Keyword(s):  
High Efficiency ◽  
Gas Mixture ◽  
Noncondensing Gases

The effects of D2 addition on the discharge characteristics of He–Ne–Xe gas mixture in an AC-PDP

Displays ◽  
2005 ◽  
Vol 26 (1) ◽  
pp. 23-28
Author(s):  
B.K. Joung ◽  
S.O. Kwon ◽  
J.S. Kim ◽  
H.J. Hwang
Keyword(s):  
Gas Mixture ◽  
Discharge Characteristics

Development of Gas Mixture System of Biogas and Natural Gas for Gas Engine Cogeneration

2005 ◽  
Author(s):  
Kunihiro Kokubu ◽  
Masakazu Hishinuma ◽  
Daisuke Isshiki
Keyword(s):  
Natural Gas ◽  
High Efficiency ◽  
Gas Mixture ◽  
Reliable Control ◽  
Cogeneration Plant ◽  
Safety Measures ◽  
Mixture Ratio ◽  
Gas Engine ◽  
Cogeneration System ◽  
Mixture System

Tokyo Gas has developed a compact and high-efficiency cogeneration system which can run with the mixture of biogas and natural gas, based on a new concept. To utilize the biogas whose amount of production varies from time to time, we have developed a gas mixture system that utilizes as much biogas as possible under simple and reliable control. Also, we have developed an air dilution system of natural gas to maintain stable combustion at the engine. Due to this system, the mixture ratio of biogas and natural gas can be anything from 0% to 100%. Further more, since this system is equipped with multiple safety measures, cogeneration system can continue its operation even after any thinkable malfunctions of the system. This gas mixture system and cogeneration plant has been installed at a beer brewery near Tokyo, and operating without any major troubles.

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