example of heat transfer through radiation
An experimental investigation of heat transfer and fluid flow in a rectangular duct with inclined discrete ribs
Ngày tải lên :
05/09/2013, 16:10
... Nusselt number (heat transfer
coefficient) as a function of roughness and flow parameters in the form of repeated ribs. In order to
understand the mechanism of heat transfer through a roughened ... value of turbulent intensity is observed at the relative gap width of 1.0 which is in the line of heat
transfer measurements. These results of PIV showed good agreement between the heat transfer ... Investigation of heat transfer and friction for rib-
roughened surfaces, Int. Journal of Heat & Mass Transfer 1978; 21: 1143-1156.
[4] Webb R.L., Eckert E.R.G. and Goldstein R. J. Heat transfer...
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Heat transfer enhancement through inner grooved copper tubes with different tube parameters
Ngày tải lên :
05/09/2013, 16:10
... of
this paper is to present the evaluation of condensation and refrigeration heat transfer performances of two
types of mirofin tubes namely Tube A and Tube B.
International Journal of ... Calculation of turbulent flow and heat transfer in a porous-
based channel. Int. J Heat Mass Transfer, 46:771-780.
[26] Park, I.S. and Choi, D.H. 2001. Heat and mass -transfer analysis of the condensing ... Honda, H. 2000. Condensation of refrigerants in horizontal, spirally grooved
microfin tubes: Numerical analysis of heat transfer in the annular flow regime. J Heat Transfer,
122:80-91.
[5] Cavallini,...
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Tài liệu Báo cáo khoa học: Structural and mechanistic aspects of flavoproteins: electron transfer through the nitric oxide synthase flavoprotein domain pdf
Ngày tải lên :
18/02/2014, 11:20
... assessment
of the relative importance of conformational change
rates versus rates of FMNH
2
formation in limiting elec-
tron flux through the CaM-bound NOS enzymes. In
general, as the k
on
and k
off
of ... fast
rates of FMNH
2
formation, electron flux through the
flavoprotein is primarily a function of the rates of con-
formational change (k
1
, k
2
) that determine K
eq
A. How-
ever, when the rate of conformational ... a
useful predictor (but never proof) of changes in equilib-
rium A in dual-flavin enzymes. Figure 6 contains curves
showing how electron flux through the FMN subdo-
main of a dual-flavin enzyme, as measured...
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Báo cáo khoa học: Copper-containing nitrite reductase fromPseudomonas chlororaphis DSM 50135 Evidence for modulation of the rate of intramolecular electron transfer through nitrite binding to the type 2 copper center pot
Ngày tải lên :
07/03/2014, 15:20
... electron-
transfer mechanism, EPR data indicate that the binding of
nitrite to the T2Cu center increases its potential, favoring the
electron -transfer process. Analysis of the EPR spectrum of
the ... 1.7.2.1).
*Present address: Institute of Pharmacology and Therapeutics, Faculty
of Medicine of Porto, and Institute for Molecular and Cell Biology,
University of Porto, Alameda Prof. Hernaˆ ni Monteiro,
4200–319 ... (1976) Assays of proteins
in the presence of interfering materials. Anal. Biochem. 70,
241–250.
21. Laemmli, U. K. (1970) Cleavage of structural proteins during the
assembly of the head of bacteriophage...
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doe fundamentals handbook - thermodynamics, heat transfer, and fluid flow - volume 1 of 3
Ngày tải lên :
17/03/2014, 15:00
... types of latent heat. The first is the latent heat of fusion. This
is the amount of heat added or removed to change phase between solid and liquid. The second
type of latent heat is the latent heat ... ENERGY, WORK, AND HEAT
Another type of heat is called latent heat. Latent heat is the amount of heat added to or removed
from a substance to produce a change in phase. When latent heat is added, ... latent heat of vaporization. This is the amount of heat added or
removed to change phase between liquid and vapor. The latent heat of vaporization is sometimes
called the latent heat of condensation.
Different...
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doe fundamentals handbook - thermodynamics, heat transfer, and fluid flow - volume 2 of 3
Ngày tải lên :
17/03/2014, 15:00
... portions of a fluid.
Radiation, or radiant heat transfer, involves the transfer of heat by
electromagnetic radiation that arises due to the temperature of a body.
Heat flux is the rate of heat transfer ... modes of heat transfer:
Conduction involves the transfer of heat by the interactions of atoms or molecules of a
material through which the heat is being transferred.
Convection involves the transfer ... represents a measure of the ability to transfer
heat through a stagnant film layer.
The overall heat transfer coefficient is the measure of the ability of a heat
exchanger to transfer heat from one...
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doe fundamentals handbook - thermodynamics, heat transfer, and fluid flow - volume 3 of 3
Ngày tải lên :
17/03/2014, 15:00
... feet, of a column of water that a given pressure will support. Each of
the energies possessed by a fluid can be expressed in terms of head. The elevation head
represents the potential energy of ... represents the flow energy of a column of fluid whose weight is equivalent to the
pressure of the fluid.
The sum of the elevation head, velocity head, and pressure head of a fluid is called the ... Av
ã The principle of conservation of mass states that all mass flow rates into a
control volume are equal to all mass flow rates out of the control volume
plus the rate of change of mass within...
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convective heat transfer mathematical and computational modelling of viscous fluids and porous media
Ngày tải lên :
01/04/2014, 10:51
... boundary conditions of practi-
cal interest. The number of excellent review articles, books and monographs, which
summarise the state -of- the-art of convective heat and mass transfer, which are ... features of the flow
and heat transfer characteristics, as for example, boundary-layer separation and flow
circulation. As a result, these characteristics depend on the development of the vis- ... delaying the onset of the separation of the boundary-layer from the plate,
as can be seen from Figure 2.15, where the plot of the location of the separation
point,
Xs,
as a function of
Pr (xs
is...
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fundamentals of heat and mas transfer seventh edition
Ngày tải lên :
02/04/2014, 15:51
... surface of the wall. The heat loss through the wall of area
is then
᭠
Comments: Note the direction of heat flow and the distinction between heat flux and
heat rate.
*This icon identifies examples ... function of current for
the range 100 Յ I Յ 5000 A. Also plot the ratio
of the heat transfer by convection to the total heat
transfer.
1.62 A small sphere of reference-grade iron with a specific
heat ... applicability of heat exchanger analysis to heat
sink design and materials processing. Much of the coverage of compact heat exchangers
included in the previous edition was limited to a specific heat exchanger....
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fundamentals of heat and mass transfer
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02/04/2014, 15:51
... What is the heat flux through a 2 m ϫ 2 m sheet of
the insulation?
(b) What is the rate of heat transfer through the sheet
of insulation?
1.2 The heat flux that is applied to the left face of a plane
wall ... heater dissipates
2 kW while submerged in a water flow that is at 20ЊC
and provides a convection heat transfer coefficient of
h ϭ 5000 W/m
2
⅐ K. Neglecting heat transfer from the
ends of the heater, ... description of the heat
transfer between a heat engine and its surroundings further limits the actual efficiency of a
heat engine.
1.3.1 Relationship to the First Law of Thermodynamics
(Conservation of...
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