Mathematical Modeling of a Radiative Heat Transfer Process in the System of the Solar Energy Concentrator-Receiver for Space High-Temperature Solar Power Plant

2010 ◽  
Author(s):  
Victor V. Leonov
Keyword(s):  
Mathematical Modeling ◽  
Heat Transfer ◽  
Solar Energy ◽  
Radiative Heat ◽  
Outer Space ◽  
Power Source ◽  
Heat Transfer Process ◽  
Emission Characteristics ◽  
Solar Power Plant ◽  
Solar Energy Concentrator

Unlimited capacity, extraordinary constancy of emission characteristics and environmental purity enables solar energy to become a very promising and widely used power source in Solar System outer space development missions up to Martian orbit.

Mathematical modeling of the heat-transfer process and solid particles in a fluidized bed

1982 ◽  
Vol 42 (2) ◽  
pp. 169-176
Author(s):  
V. A. Borodulya ◽  
Yu. S. Teplitskii ◽  
Yu. G. Epanov ◽  
Yu. E. Livshits ◽  
I. I. Yanovich
Keyword(s):  
Mathematical Modeling ◽  
Heat Transfer ◽  
Fluidized Bed ◽  
Transfer Process ◽  
Heat Transfer Process ◽  
Solid Particles

The DRESOR Method for a Collimated Irradiation on an Isotropically Scattering Layer

2006 ◽  
Vol 129 (5) ◽  
pp. 634-645 ◽  
Author(s):  
Qiang Cheng ◽  
Huai-Chun Zhou
Keyword(s):  
Heat Transfer ◽  
Monte Carlo ◽  
Radiative Heat ◽  
Radiation Flux ◽  
Solid Angle ◽  
Heat Transfer Process ◽  
Arbitrary Direction ◽  
Scattering Layer ◽  
Radiation Fluxes ◽  
Angle Space

Forward and backward Monte Carlo methods may become inefficient when the radiant source is collimated and radiation onto a small, arbitrary spot and onto a small, arbitrary direction cone is desired. In this paper, the DRESOR method was formulated to study the radiative heat transfer process in an isotropically scattering layer exposed to collimated radiation. As the whole spherical solid angle space was uniformly divided into 13,316 discrete solid angles, the intensity at some point in up to such discrete directions was given. The radiation fluxes incident on a detector inside the layer for varying acceptance angles by a step of 2deg were also measured, which agreed well with those in literature. The radiation flux across the top and the bottom boundaries were also provided.

Mathematical modeling of heat transfer process in a variable domain

2007 ◽  
Vol 50 (2) ◽  
pp. 164-171
Author(s):  
Xueshi Yang ◽  
Jun Zhang ◽  
Shiyin Qin ◽  
Huansheng Ning
Keyword(s):  
Mathematical Modeling ◽  
Heat Transfer ◽  
Transfer Process ◽  
Heat Transfer Process ◽  
Variable Domain

COMMENT ON "FALSIFICATION OF THE ATMOSPHERIC CO2 GREENHOUSE EFFECTS WITHIN THE FRAME OF PHYSICS"

2010 ◽  
Vol 24 (10) ◽  
pp. 1309-1332 ◽  
Author(s):  
JOSHUA B. HALPERN ◽  
CHRISTOPHER M. COLOSE ◽  
CHRIS HO-STUART ◽  
JOEL D. SHORE ◽  
ARTHUR P. SMITH ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Radiative Heat ◽  
Second Law Of Thermodynamics ◽  
Heat Transfer Process ◽  
Second Law ◽  
Surface Cool ◽  
Radiative Balance ◽  
Heat Flows ◽  
Greenhouse Effects ◽  
Complete Process

In this journal, Gerhard Gerlich and Ralf D. Tscheuschner claim to have falsified the existence of an atmospheric greenhouse effect.1 Here, we show that their methods, logic, and conclusions are in error. Their most significant errors include trying to apply the Clausius statement of the Second Law of Thermodynamics to only one side of a heat transfer process rather than the entire process, and systematically ignoring most non-radiative heat flows applicable to the Earth's surface and atmosphere. They claim that radiative heat transfer from a colder atmosphere to a warmer surface is forbidden, ignoring the larger transfer in the other direction which makes the complete process allowed. Further, by ignoring heat capacity and non-radiative heat flows, they claim that radiative balance requires that the surface cool by 100 K or more at night, an obvious absurdity induced by an unphysical assumption. This comment concentrates on these two major points, while also taking note of some of Gerlich and Tscheuschner's other errors and misunderstandings.

scholarly journals REPLY TO "COMMENT ON 'FALSIFICATION OF THE ATMOSPHERIC CO2 GREENHOUSE EFFECTS WITHIN THE FRAME OF PHYSICS' BY JOSHUA B. HALPERN, CHRISTOPHER M. COLOSE, CHRIS HO-STUART, JOEL D. SHORE, ARTHUR P. SMITH, JÖRG ZIMMERMANN"

2010 ◽  
Vol 24 (10) ◽  
pp. 1333-1359 ◽  
Author(s):  
GERHARD GERLICH ◽  
RALF D. TSCHEUSCHNER
Keyword(s):  
Heat Transfer ◽  
Radiative Heat ◽  
Second Law Of Thermodynamics ◽  
Heat Transfer Process ◽  
Trace Gas ◽  
Second Law ◽  
Heat Flows ◽  
The Earth ◽  
Greenhouse Effects ◽  
Fundamental Physical

It is shown that the notorious claim by Halpern et al. recently repeated in their comment that the method, logic, and conclusions of our "Falsification Of The CO2 Greenhouse Effects Within The Frame Of Physics" would be in error has no foundation. Since Halpern et al. communicate our arguments incorrectly, their comment is scientifically vacuous. In particular, it is not true that we are "trying to apply the Clausius statement of the Second Law of Thermodynamics to only one side of a heat transfer process rather than the entire process" and that we are "systematically ignoring most non-radiative heat flows applicable to Earth's surface and atmosphere". Rather, our falsification paper discusses the violation of fundamental physical and mathematical principles in 14 examples of common pseudo-derivations of fictitious greenhouse effects that are all based on simplistic pictures of radiative transfer and their obscure relation to thermodynamics, including but not limited to those descriptions (a) that define a "Perpetuum Mobile Of The 2nd Kind", (b) that rely on incorrectly calculated averages of global temperatures, (c) that refer to incorrectly normalized spectra of electromagnetic radiation. Halpern et al. completely missed an exceptional chance to formulate a scientifically well-founded antithesis. They do not even define a greenhouse effect that they wish to defend. We take the opportunity to clarify some misunderstandings, which are communicated in the current discussion on the non-measurable, i.e., physically non-existing influence of the trace gas CO2 on the climates of the Earth.

Mathematical Modeling of Heat Transfer through Clothing System

2011 ◽  
Vol 250-253 ◽  
pp. 3889-3892
Author(s):  
Yu Chai Sun ◽  
Zhong Hao Cheng
Keyword(s):  
Mathematical Modeling ◽  
Heat Transfer ◽  
Heat Conduction ◽  
Theoretical Prediction ◽  
Transfer Process ◽  
Heat Transfer Process ◽  
Conservation Of Energy ◽  
Mathematical Equations ◽  
Boltzmann Law ◽  
Theoretical Results

Based on fundamental principles of Fourier's law of heat conduction, Newton's law of cooling, Stefan-Boltzmann law and the law of conservation of energy, this paper gave out mathematical equations for description of the general heat transfer process through clothing system, and compares the theoretical results with experimental results. The result of the experiment is in accordance with the theoretical prediction.

scholarly journals MATHEMATICAL MODELING OF HEAT TRANSFER IN A HORIZONTAL HEAT EXCHANGE PIPE

2020 ◽  
Vol 2020 (1) ◽  
pp. 57-60
Author(s):  
Aleksey Bal'chugov ◽  
Mihail Vazhenin ◽  
Borislav Kustov
Keyword(s):  
Mathematical Modeling ◽  
Heat Transfer ◽  
Heat Exchange ◽  
Transfer Process ◽  
Heat Transfer Process ◽  
Atmospheric Air ◽  
Ideal Displacement ◽  
Displacement Model ◽  
The Ideal

It has been experimentally established that the ideal displacement model adequately describes the heat transfer process in a horizontal heat exchange pipe cooled by atmospheric air

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