Automated suite for metrological support to working means of measuring thermal radiation flux densities

1985 ◽  
Vol 28 (12) ◽  
pp. 1079-1081
Author(s):  
O. A. Gerashchenko ◽  
N. N. Bazyr' ◽  
V. N. Morozov ◽  
S. A. Sazhina
Keyword(s):  
Thermal Radiation ◽  
Metrological Support ◽  
Radiation Flux

scholarly journals Particle dynamics in the stellar magnetosphere by gravitational collapse

2010 ◽  
Vol 6 (S271) ◽  
pp. 383-384
Author(s):  
Volodymyr Kryvdyk
Keyword(s):  
Thermal Radiation ◽  
Gravitational Collapse ◽  
Radiation Flux ◽  
Gamma Ray ◽  
Wide Band ◽  
Particle Dynamics ◽  
X Rays ◽  
Relativistic Jets ◽  
Stellar Radius ◽  
Polar Caps

AbstractThe particle dynamics and in the stellar magnetosphere during gravitational collapse is investigated. The formations of relativistic jets and the generation of the radiation bursts in the stellar magnetosphere by gravitational collapse are considered. As follows from results, the stars on the stage of gravitational collapse must be powerful sources of the relativistic jets and the non-thermal radiation. These jets will formed in the polar caps of collapsing stars magnetospheres, when the stellar magnetic field increases during collapse and the charged particles will be accelerate. These jets will generate the non-thermal radiation. The radiation flux grows with decreasing stellar radius and can be observed in the form of radiation burst in wide band wave- from radio to gamma-ray. These bursts radiation can be observed as gamma- and X- rays bursts.

Augmentation of Thermal Radiation Flux Resistance Capacity Using Autoclaved Aerated Concrete (AAC) Blocks: A Sustainable Approach

2015 ◽  
Vol 650 ◽  
pp. 114-121
Author(s):  
Amarjit Sahu ◽  
Moni Sankar Hazra
Keyword(s):  
Thermal Radiation ◽  
Radiation Flux ◽  
Extensive Study ◽  
Mitigation Measures ◽  
Process Unit ◽  
Light Weight ◽  
Protective Measures ◽  
Air Conditioning System ◽  
Safety Requirements ◽  
Aerated Concrete

EIL had carried out consequence modelling for catastrophic rupture of debutanizer reflux drum of FCC unit in Haldia refinery and analyzed the mitigation measures required. The catastrophic rupture may produce thermal radiation distances due to fireball of 12.5kW/m2, which will be extending up to administrative building. It was recommended that any openings facing towards process unit should be blocked and protective measures to be taken to withstand thermal radiation of 12.5kW/m2. Therein, extensive study was carried out on the properties of the AAC blocks and it was found that they are light weight, can withstand temperature below 30000C without crumbling and have excellent fire resistance properties. Plate glass in a window can absorb some 40 to 60% of the radiation from a building fire and cannot be relied on to afford protection as large areas are liable to crack and fall out. Hence, glazed openings of the Administrative Building towards the Process Units were closed with AAC blocks of 125mm thickness. Apart from ensuring desired safety requirements and reducing spread of incident heat flux to internal parts of the building during a fire, this has also brought down the heat load on the air-conditioning system due to lower interior temperature.

Thermal Radiation in Laminar Boundary Layers on Continuous Moving Surfaces

1974 ◽  
Vol 96 (1) ◽  
pp. 32-36 ◽  
Author(s):  
C. A. Rhodes ◽  
C. C. Chen
Keyword(s):  
Heat Transfer ◽  
Thermal Radiation ◽  
Boundary Layers ◽  
Analytical Study ◽  
Radiation Flux ◽  
Radiation Heat Transfer ◽  
Normal Velocity ◽  
Radiation Heat ◽  
Flat Plates ◽  
Laminar Boundary Layers

Thermal radiation heat transfer is studied in boundary layers on continuous moving surfaces. An analytical study is performed for two-dimensional laminar flow of an absorbing and emitting fluid. Solutions were obtained for limiting conditions of optically thin and thick boundary layers. Comparisons indicate that the radiation flux in these boundary layers is less than that for flow over semi-infinite flat plates for optically thin flows. The radiation contribution becomes more nearly equal as optical thickness increases. The normal velocity induced in the free stream by the wall motion significantly affects the radiation heat transfer.

Experimental and numerical analysis of the heat transfer in a packed bed exposed to the high thermal radiation flux

2019 ◽  
Vol 136 ◽  
pp. 383-392 ◽  
Author(s):  
Gustavo Ruiz ◽  
Nicolás Ripoll ◽  
Nataliia Fedorova ◽  
Ana Zbogar-Rasic ◽  
Vojislav Jovicic ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Numerical Analysis ◽  
Thermal Radiation ◽  
Radiation Flux ◽  
Packed Bed

Thermal Hydraulics and Thermal Radiation for Ultra High Temperature Gas-Cooled Nuclear Reactor With Pebble Type Fuel

2005 ◽  
Author(s):  
Motoo Fumizawa
Keyword(s):  
High Temperature ◽  
Thermal Radiation ◽  
Surface Temperature ◽  
Radiation Flux ◽  
Coolant Temperature ◽  
Present Calculation ◽  
System Pressure ◽  
High Temperature Reactor ◽  
Type Fuel ◽  
Ultra High Temperature

This report presents the results of thermal-hydraulic analysis for the Ultra High Temperature Reactor Experiment (UHTREX) as well as the modular Gas Turbine High Temperature Reactor 300 MWth (HTGR-GT300) loaded with Pebble Type Fuel. A thermal-hydraulic computer code was developed that was named PEBTEMP. In order to compare the present PBR case with UHTREX, a calculation for HTGR-GT300 was carried out in the similar conditions with UHTREX i.e. the inlet coolant temperature of 871°C, system pressure of 3.45 MPa and power density of 1.3 W/cm3. The hot channel factor of 1.0, 1.1, 1.2, and 1.3 are chosen for the present calculation. As the result, the fuel temperature for the present PBR case is extremely low when compared to the UHTREX case. The evaluated temperature is compared to the data of conventional optical high temperature camera using the principle of the thermal radiation flux dependence upon surface temperature. Therefore, the present PBR system design will be named as NUHTREX i.e. New UHTREX. The evaluated temperature is compared to the data of conventional optical high temperature camera using the principle of the thermal radiation flux dependence upon surface temperature.

scholarly journals Efficient NIR light blockage with matrix embedded silver nanoprism thin films for energy saving window coating

2016 ◽  
Vol 4 (8) ◽  
pp. 1584-1588 ◽  
Author(s):  
M. Carboni ◽  
M. Carravetta ◽  
X. L. Zhang ◽  
E. Stulz
Keyword(s):  
Thin Films ◽  
Thermal Radiation ◽  
Energy Saving ◽  
Radiation Flux ◽  
Low Cost ◽  
Composite Films ◽  
Silver Nanoprisms ◽  
Highly Efficient ◽  
Pmma Matrix ◽  
Nir Light

Highly efficient composite films, consisting of silica coated and functionalised silver nanoprisms (SNPs) which are covalently embedded in a PMMA matrix, are presented as a low-cost material to reduce thermal radiation flux with low impact on daylight transmission.

scholarly journals Relativistic jets and non-thermal radiation from collapse of stars to black holes

2006 ◽  
Vol 2 (S238) ◽  
pp. 395-396
Author(s):  
V. Kryvdyk ◽  
A. Agapitov
Keyword(s):  
Magnetic Field ◽  
Black Holes ◽  
Shock Waves ◽  
Electric Field ◽  
Thermal Radiation ◽  
Radiation Flux ◽  
Thermal Emission ◽  
Charged Particles ◽  
Particle Spectrum ◽  
Relativistic Jets

AbstractThe formation of the relativistic jets and a non-thermal emission from the collapsing magnetized stars with dipole magnetic fields and the heterogeneous particles distribution are investigated. These polar jets are formed when the stellar magnetosphere compress during collapse its magnetic field increases considerable. The electric field is produced in magnetosphere, which the charged particles will be accelerated. As follow from the calculation, the jets can be formed from collapsing stars already the explosion of supernova stars without shock waves. These jets will generate the non-thermal radiation. The radiation flux depends on the distance to the star, its magnetic field and the particle spectrum in the magnetosphere. This flux can be observed near Earth by means of modern telescopes in the form of the radiation pulse with duration equal to time collapse.

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