scholarly journals Axisymmetric radiation intensity model for annular reactors

AIChE Journal ◽  
2021 ◽  
Author(s):  
Baoqing Deng ◽  
Shijian Peng ◽  
Kaiyang Ye ◽  
Bensheng Zhao
Keyword(s):  
Radiation Intensity ◽  
Intensity Model

scholarly journals Axisymmetric radiation intensity model for annular reactors

2020 ◽  
Author(s):  
Baoqing Deng ◽  
Kaiyang Ye ◽  
Bensheng Zhao
Keyword(s):  
Experimental Data ◽  
Uv Radiation ◽  
Radiation Intensity ◽  
Line Source ◽  
Two Dimensional ◽  
Mathematical Expressions ◽  
Uv Reactor ◽  
Emission Models ◽  
Uv Lamp ◽  
Intensity Model

Cylindrical lamps are usually equipped in the tubular UV reactor to offer UV radiation. This paper describes the axisymmetric characteristics of UV radiation from the cylindrical UV lamp. Axisymmetric lamp emission models are developed in a two-dimensional axisymmetric space for the line source, the superficial source and the volumetric source. The present axisymmetric lamp emission models are easy to understand and of simple mathematical expressions. The experimental data in literature is used to validate the present axisymmetric lamp emission models. Good agreements have been obtained between the experimental data and the computations. A comparison show that the present models obtain the identical results as previous models.

Radiation of Charge Moving Between Two Planar Periodic Wire Structures

2020 ◽  
Vol 23 (1) ◽  
pp. 66-71
Author(s):  
E. A. Gurnevich ◽  
I. V. Moroz
Keyword(s):  
Angular Distribution ◽  
Charged Particle ◽  
Research And Development ◽  
High Power ◽  
Free Electron ◽  
Radiation Intensity ◽  
Free Electron Lasers ◽  
Radiation Sources ◽  
Power Radiation ◽  
High Power Radiation

The Smith-Purcell radiation of a charged particle moving in a periodic structure is analysed theoretically. The considered structure consists of two planar diffraction gratings with different periods which are formed by parallel conducting wires. The analytical expression for the spectral-angular distribution of radiation is obtained. It is shown that the angular distribution of radiation can be made narrower by using two gratings instead of one, and radiation intensity can be manipulated by parallel relative shift of gratings. The obtained results are of great importance for the research and development of high power radiation sources based on volume free-electron lasers.

The Thermal Emittance of Cigarette Coal

1976 ◽  
Vol 8 (5) ◽  
Author(s):  
Andrew T. Lendvay ◽  
Tibor S. Laszlo
Keyword(s):  
Radiation Intensity ◽  
Thermal Emittance ◽  
Temperature Levels

AbstractThe radiation intensity emitted by the surface of an extinguished cigarette coal in a heated environment was compared with the radiation intensity of an artificial blackbody at the same temperature. The experiments were carried out at several temperature levels between 50°C and 125°C. The results indicate that the emittance of the cigarette coal is close to unity. The calculated values based on data obtained within the limits of the experiments varied between 0.997 and 0.91 (average 0.97).

A semi-analytic method for FM-EDFA intensity model

2021 ◽  
Vol 64 ◽  
pp. 102546
Author(s):  
Xinrui Jiang ◽  
Baojian Wu ◽  
Yanqiu Xie ◽  
Feng Wen ◽  
Kun Qiu
Keyword(s):  
Analytic Method ◽  
Intensity Model

scholarly journals Effects of Nocturnal UV-B Irradiation on Growth, Flowering, and Phytochemical Concentration in Leaves of Greenhouse-Grown Red Perilla

Plants ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1252
Author(s):  
Hideo Yoshida ◽  
Tatsuru Nishikawa ◽  
Shoko Hikosaka ◽  
Eiji Goto
Keyword(s):  
Radiation Intensity ◽  
Rosmarinic Acid ◽  
Color Change ◽  
Control Treatment ◽  
Leaf Color ◽  
Fresh Weight ◽  
High Concentration ◽  
Fluorescent Lamps ◽  
Phenotypic Quality ◽  
Intermittent Illumination

In Japan, red perilla leaves are used in the food and coloring industries, as well as in crude medicine. Perilla leaves contain a high concentration of phytochemicals such as perillaldehyde (PA) and rosmarinic acid (RA). The effects of UV-B radiation intensity (0.05–0.2 W m−2, UV-BBE: 0.041–0.083 W m−2), duration (3 or 6 h), and irradiation method (continuous or intermittent) for artificial nocturnal lighting using UV-B fluorescent lamps were evaluated on growth, flowering, and leaf phytochemical concentration in greenhouse-grown perilla. Under continuous UV-B irradiation at 0.1 W m−2 for 3 or 6 h, leaf color changed from red to green and leaf fresh weight decreased, compared with the control treatment. No leaf color change was observed under the 3-h treatment with UV-B radiation at 0.05 W m−2, wherein leaf fresh weight was similar to that of the control. Furthermore, RA concentration under continuous UV-B irradiation at 0.05 W m−2 for 3 h increased two-fold compared to that under control treatment, while PA concentration was not affected by UV-B irradiation. Thus, our data showed that continuous UV-B irradiation at 0.05 W m−2 for 3 h could effectively produce RA-rich perilla leaves without reducing in phenotypic quality or productivity. However, a 6-h intermittent illumination inhibited flowering without altering phytochemical concentration.

Influence of radiation intensity on the value of the mean quantum yield of the photodestruction of benzophenone

1981 ◽  
Vol 34 (2) ◽  
pp. 235-237
Author(s):  
K. M. Dyumaev ◽  
E. P. Lebedeva ◽  
G. A. Matyushin
Keyword(s):  
Quantum Yield ◽  
Radiation Intensity ◽  
The Mean

Self-stabilization of the radiation intensity of a two-frequency gas laser

1990 ◽  
Vol 20 (10) ◽  
pp. 1194-1199 ◽  
Author(s):  
V G Gudelev ◽  
Yu P Zhurik ◽  
A Ch Izmaĭlov ◽  
V M Yasinskiĭ
Keyword(s):  
Radiation Intensity ◽  
Gas Laser ◽  
Self Stabilization

Proposal of Linear Drive for Mechatronic Facility of Solar Panels

2013 ◽  
Vol 460 ◽  
pp. 57-64 ◽  
Author(s):  
Miroslav Rimár ◽  
Štefan Kuna ◽  
Ivan Čorný
Keyword(s):  
Feedback Control ◽  
Electric Drive ◽  
Radiation Intensity ◽  
Solar Panels ◽  
Drive Control

The paper deals with proposal of synthesis of drive control of solar panels facility. New way of facility control is presented. The facility serves for solar panels rotation according to sun radiation intensity, sun location, and feedback control of position of linear electric drive.

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