Coordination of energy parameters of the ultraviolet bactericidal recirculator of air of livestock premises

2020 ◽  
pp. 187-193
Author(s):  
O. F. Dovbnenko
Keyword(s):  
Radiation Power ◽  
General Purpose ◽  
Specific Power ◽  
Uvb Radiation ◽  
Energy Parameters ◽  
Industrial Enterprises ◽  
Radiation Sources ◽  
Cleaning And Disinfection ◽  
Installed Capacity ◽  
Bactericidal Efficiency

Annotation Purpose. Coordination of energy parameters of the ultraviolet bactericidal recirculator of air of animal premises for achievement of the set value of bactericidal efficiency. Methods. Methods of analysis, mathematical modeling and engineering methods of calculation of ultraviolet bactericidal installations are used. Results. Methods of application of ultraviolet bactericidal (UVB) installations for cleaning and disinfection of indoor air are analyzed. Substantiated design, UVB air recirculator. The dependences of the bactericidal power of UVB radiation sources in the recirculator on air productivity and bactericidal efficiency are determined. The specific power of UVB radiation to achieve the specified value of bactericidal efficiency and rational values of bactericidal efficiency of recirculates for industrial enterprises and general purpose premises are established. Conclusions 1. The specific power of UVB radiation to achieve the specified value of bactericidal efficiency in the range of 80…99.9% with the use of UVB air recirculators. To ensure bactericidal efficiency of 80%, the specific power of bactericidal radiation is 6.5 W/100 m3, and for 99.9% 4.3 times more than – 27.9 W/100 m3. 2. Due to the need to significantly increase the installed capacity of irradiators, ultraviolet air recirculators with bactericidal efficiency of more than 95% should be used in premises of categories 1 and 2, as well as in agricultural production facilities for feasibility study. 3. To achieve a recirculator RPB 1.0 with air productivity = 1000 m3/h bactericidal efficiency = 90% required bactericidal radiation power = 93 W, and for = 99% – = 186 W. Keywords: ultraviolet bactericidal recirculator, air purification and disinfection, bactericidal power of ultraviolet irradiators, bactericidal efficiency of recirculator.

scholarly journals Development of ultraviolet bactericidal recirculator for air purification of livestock buildings

2019 ◽  
pp. 149-155
Author(s):  
Dovbnenko, O. ◽  
Kolesnik, I.
Keyword(s):  
Engineering Calculation ◽  
Air Purification ◽  
Uvb Radiation ◽  
Purification Process ◽  
Technical Parameters ◽  
Livestock Buildings ◽  
Air Capacity ◽  
Installed Capacity ◽  
Bactericidal Efficiency ◽  
Grounded Design

Purpose. Improving the efficiency of the air purification process through the use of the created design and determining the rational parameters of the luminescent ultraviolet bactericidal air recirculator for livestock buildings. Methods. Methods of analysis, mathematical modeling and engineering methods for calculating irradiation installations are used. Results. The methods of application of ultraviolet bactericidal (UVB) plants for purification and disinfection of the air environment in agricultural premises are analyzed. Impact mechanism established of UVB radiation and ozone for pathogenic microflora and harmful impurities in the air of livestock premises is substantiated. The grounded design, the method of engineering calculation and the technical parameters of the UVB air recirculator are determined. Experimental samples of UVB recirculators of air in livestock buildings were made and the results of their production tests are presented. Conclusions. UVB recycle converter with application of luminescent UVB lamps with installed capacity = 180 W and air capacity = 1800 m3/h provides bactericidal efficiency = 75%, and with = 1000 m3/h – bactericidal efficiency = 90%. Keywords: recirculator, ultraviolet, bactericidal, ozone, air purification, disinfection, microclimate of livestock buildings.

scholarly journals ENERGY EFFICIENT WATER-COOLED ELEMENTS FOR FOUNDRY CLASS ELECTRIC ARC STEELMAKING FURNACES

2021 ◽  
pp. 55-58
Author(s):  
S. Timoshenko ◽  
E. Nemtsev ◽  
M. Gubinski
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Melting Process ◽  
Electric Arc Furnace ◽  
General Purpose ◽  
Electric Arc ◽  
Oxidation Potential ◽  
Low Energy ◽  
Specific Power ◽  
Arc Furnace

Possibility of a wide choice of original charge and variation of oxidation potential in melting process makes the electric arc furnace (EAF) a general-purpose unit in foundries. Energy-intensive classical technology with insufficient specific power of the transformer, irregular operation with forced downtime predetermine a low energy efficiency of foundry class furnaces [1,2]. Flat and shallow bath of the EAF enhances the problem.

scholarly journals A Paris-Edinburgh Cell for High-Pressure and High-Temperature Structure Studies on Silicate Liquids Using Monochromatic Synchrotron Radiation

Minerals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 715
Author(s):  
Tony Yu ◽  
Clemens Prescher ◽  
Young Jay Ryu ◽  
Feng Shi ◽  
Eran Greenberg ◽  
...  
Keyword(s):  
High Pressure ◽  
General Purpose ◽  
Array Detector ◽  
Temperature Structure ◽  
X Ray ◽  
X Ray Scattering ◽  
Radiation Sources ◽  
Amorphous Silicate ◽  
Silicate Liquids ◽  
Ray Scattering

A Paris-Edinburgh press combined with a multi-channel collimator assembly has been commissioned at the GeoSoilEnviro Center for Advanced Radiation Sources (GSECARS) beamline for monochromatic X-ray scattering, with an emphasis on studying low-Z liquids, especially silicate liquids at high pressure. The Paris-Edinburgh press is mounted on a general-purpose diffractometer, with a pixel array detector mounted on the detector arm. The incident monochromatic undulator beam with energies up to 60 keV is focused both horizontally and vertically to a beam size about 30 × 30 µm. With this setup, background scattering from the surrounding pressure media is completely removed at 2θ angles above 10° for samples larger than 1.05 mm in diameter. Thirty minutes is typically sufficient to collect robust X-ray scattering signals from a 1.6 mm diameter amorphous silicate sample. Cell assemblies for the standard Paris-Edinburgh anvils have been developed and pressures and temperatures up to 7 GPa and 2300 K, respectively, have been maintained steadily over hours. We have also developed a cupped-toroidal Drickamer anvil to further increase pressure and temperature capabilities. The cupped-toroidal Drickamer anvil combines features of a modified Drickamer anvil and the traditional Paris-Edinburgh anvil. Pressures up to 12 GPa have been generated at temperatures up to 2100 K.

Improved-Efficiency Irradiation Facility for Poultry Farming

2018 ◽  
Vol 7 (3.19) ◽  
pp. 1
Author(s):  
O Yu. Kovalenko ◽  
Yu. A. Pilshchikova
Keyword(s):  
Spectral Sensitivity ◽  
Optical Radiation ◽  
Spectral Composition ◽  
Radiation Sources ◽  
Bactericidal Efficiency ◽  
Poultry Farming

This article discusses the effectiveness of influence of irradiation lighting facility on the productivity and homogeneity of broilers. Irradiation lighting facility of increased efficiency is proposed. Its spectral composition of radiation sources corresponds to the function of relative spectral sensitivity of the organ of vision, and to the functions of relative spectral erythemal and bactericidal efficiency. The results of experiment in the influence of optical radiation, received from irradiation lighting facility, on an industrial herd of broilers are given in the article.  

INTENSE THz-RADIATION SOURCES USING SEMICONDUCTORS IRRADIATED WITH FEMTOSECOND LASER PULSES IN A MAGNETIC FIELD

1999 ◽  
Vol 08 (01) ◽  
pp. 71-87 ◽  
Author(s):  
SHINJI IZUMIDA ◽  
SHINGO ONO ◽  
ZHENLIN LIU ◽  
HIDEYUKI OHTAKE ◽  
NOBUHIKO SARUKURA
Keyword(s):  
Magnetic Field ◽  
Radiation Power ◽  
Laser Pulses ◽  
Excitation Power ◽  
Femtosecond Laser Pulses ◽  
Bragg Reflector ◽  
Thz Radiation ◽  
Radiation Sources ◽  
Excitation Laser ◽  
The Magnetic Field

We report significant enhancement of THz radiation from InAs under magnetic field irradiated with femtosecond pulses. The THz-radiation power is significantly enhanced and reaches sub-mW level in a 1.7-T magnetic field with 1.5-W excitation power. The THz-radiation power is related almost quadratically both to the magnetic field and excitation laser power. Furthermore, the radiation spectrum is found to be controlled by the excitation pulsewidth, chirp direction of the excitation pulse, and the magnetic field. Additionally, we have demonstrated a new method to generate THz radiation from a saturable Bragg reflector in a magnetic field.

scholarly journals Differences in the Effects of Broad-Band UVA and Narrow-Band UVB on Epidermal Keratinocytes

2021 ◽  
Vol 18 (23) ◽  
pp. 12480
Author(s):  
Robert Bajgar ◽  
Anna Moukova ◽  
Nela Chalupnikova ◽  
Hana Kolarova
Keyword(s):  
Cell Viability ◽  
Uv Radiation ◽  
Skin Diseases ◽  
Stratospheric Ozone ◽  
Broad Band ◽  
Epidermal Keratinocytes ◽  
Ros Production ◽  
Uvb Radiation ◽  
Skin Cells ◽  
Radiation Sources

Background: The sun is a natural source of UV radiation. It can be divided into three bands, UVA (315–400 nm), UVB (280–315 nm) and UVC (100–280 nm), where the radiation up to 290 nm is very effectively eliminated by the stratospheric ozone. Although UV radiation can have a beneficial effect on our organism and can be used in the treatment of several skin diseases, it must primarily be considered harmful. Methods: In the presented work, we focused on the study of the longer-wavelength UV components (UVA and UVB) on the human epidermal keratinocyte line HaCaT. As UVA and UVB radiation sources, we used commercially available UVA and UVB tubes from Philips (Philips, Amsterdam, The Netherlands), which are commonly employed in photochemotherapy. We compared their effects on cell viability and proliferation, changes in ROS production, mitochondrial function and the degree of DNA damage. Results: Our results revealed that UVB irradiation, even with significantly lower irradiance, caused greater ROS production, depolarization of mitochondrial membrane potential and greater DNA fragmentation, along with significantly lowering cell viability and proliferative capacity. Conclusions: These results confirm that UV radiation causes severe damages in skin cells, and they need to be protected from it, or it needs to be applied more cautiously, especially if the component used is UVB.

scholarly journals Evaluation of the X-ray Response of a Position-Sensitive Microstrip Detector with an Integrated Readout Chip

1990 ◽  
Vol 34 ◽  
pp. 337-347
Author(s):  
C. Rossington ◽  
J. Jaklevic ◽  
J. Reid ◽  
C. Haber ◽  
H. Spieler
Keyword(s):  
Dynamic Range ◽  
Detection Efficiency ◽  
General Purpose ◽  
Wide Energy Range ◽  
X Ray ◽  
Radiation Sources ◽  
Wide Range ◽  
High Detection Efficiency ◽  
Wide Energy ◽  
Position Sensitive

Many of the scientific programs proposed for implementation at existing and future synchrotron radiation sources involve measurement of the spatial distribution of transmitted or diffracted x-ray beams. The design of a general purpose position-sensitive detector for use in such experiments must address several conflicting requirements. Ideally, such a detector would meet the following criteria: high detection efficiency over a wide energy range, large dynamic range in measured photon intensities and response to a wide range of measurement intervals. Existing detector systems only partially meet these requirements, although much work has gone into improving the current technology.

C. Equipment Used in Gastrointestinal Endoscopic Examinations, and its Construction (Construction and Characteristics of Endoscope Equipment Relevant to Cleaning and Disinfection)

2000 ◽  
Vol 12 (4) ◽  
pp. 373-375
Author(s):  
Kazuei Ogoshi ◽  
Taiji Akamatsu ◽  
Hiroyasu Iishi ◽  
Daizo Saito ◽  
Nobuhiro Sakaki ◽  
...  
Keyword(s):  
Cleaning And Disinfection
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