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1
An Introduction to Thermal Physics
Many liquefiers use the Joule-Kelvin effect which is the temperature change
produced when the pressure of a flowing gas is reduced without doing external
work. A Joule-Kelvin expansion is represented schematically in figure 4.12 where
...
Clement John Adkins, 1987
2
The Facts on File Dictionary of Physics, Fourth Edition
Joule–Kelvin effect /jool kel-vin/ (Joule–Thomson effect) A temperature change
that occurs when a thermally insulated gas expands through a small hole or a
porous barrier into a region of lower pressure. If the gas is initially above a certain
...
3
Engineering Thermodynamics
... is above the normal ambient temperature, and hence cooling can be obtained
by the Joule–Kelvin effect. In the case of hydrogen and helium, however, the gas
is to be precooled in heat exchangers below the maximum inversion ...
4
New Understanding Physics for Advanced Level
The Joule-Kelvin effect None of the processes described above can be used to
liquefy hydrogen, which has a boiling point of 33 K. The Joule-Kelvin effect is
used for this. It can achieve temperatures of less than 1 K. The effect was
discovered ...
5
Sterling Dictionary of Physics
Joule - Thomson Effect/Joule-Kelvin Effect : When a gas under pressure is
allowed to move through a small orifice to a region of lon pressure, it experiences
a fall of temperature. This is called the Joule - Kelvin effect. The rate of change of
...
6
Thermal Physics And Statistical Mechanics
Q.8 What is Joule-Kelvin effect? Show that Joule Kelvin effect vanishes for a
perfect gas. Also obtain the expression for Joule Kelvin effect for a Vander-
Waal's gas. Solution 8 For the Joule Kelvin effect see section 8.6. The expression
for ...
7
Thermal Physics, Second Edition
3.8 THE JOULE-KELVIN EFFECT Although we shall discuss general flow
processes in the next section, and shall return again to this particular flow
process in section 7.7, we shall find it very instructive to formulate some of our
ideas at this ...
Hence, the temperature will rise. Therefore, the occurrence of cooling effect or
heating effect depends upon the initial temperature of the gas. Joule-Thomson (
Joule-Kelvin) Effect When a gas under constant pressure is forced to flow through
...
9
Miniature
Joule-Thomson Cryocooling: Principles and Practice
Olszewski, K., “Temperature of inversion of the Joule-Kelvin effect of air and
nitrogen. Preliminary communication”, Philosophical Magazine, Vol. 6, No. 13, pp
. 722–724, (1907). Dilay, G.W., “Calculation of Joule-Thomson inversion curves
and ...
Ben-Zion Maytal, John M. Pfotenhauer, Klaus D. Timmerhaus, 2012
10
Kinetic Theory and Thermodynamics
Liquefaction of hydrogen is obtained with the help of : (a) Joule-Kelvin effect (b)
Adiabatic expansion (c) Isothermal effect (d) None of the above 12. Liquefaction
of helium is obtained with the help of : (a) Joule-Kelvin effect (b) Adiabatic ...
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Obeying a higher law
... a variety of exotic and poetic names: Bragg's Law, Einstein's Field Equation, Fermat's Principle, the Joule-Kelvin Effect, Van Der Waals Force. «Napa Valley Register, 6月 15»
