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Topic: Isothermal


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  NTPL: Isotech's Primary Laboratory
Isothermal Technology Ltd is the world's leading supplier of temperature calibration equipment.
As early as 1986, Isothermal became an approved British Calibration Service Laboratory (now UKAS) and since then Isothermal has continued to has continued to invest resources in the development of the laboratory which is the focal point of Isotech product development.
Our product development program often means UKAS have difficulty in devising a method of assessing our capability when we want to incorporate the product into the laboratory.
www.isotech.co.uk /lab.html   (223 words)

  
 [No title]
Isothermal describes ACE as a ``long-time supporter'' of the station, and emphasizes that ACE's ``role as an underwriter was entirely separate and apart from its role as a producer'' of the music festival.
Isothermal seems also to imply that the tickets were not ``consideration received'' by the station because they were thereafter used as donor premiums or listener giveaway prizes and not retained.
Isothermal admits that its station's public file was deficient at the time of our January 26th inquiry with respect to its quarterly issues/programs and donors lists, contrary to the requirements of Subsections 73.3527(e)(8) and (9) of the Commission's rules.
www.fcc.gov /eb/Orders/2001/da012831.html   (2280 words)

  
 WHAT IS AN ISOTHERMAL LAYER?   (Site not responding. Last check: 2007-10-24)
An isothermal layer is defined as a vertical column of air having a constant temperature with height.
Isothermal layers often occur in the low levels of the troposphere during a differential advection situation.
When an isothermal layer is present that is below freezing in the lower troposphere, the 50% chance snow 1000 to 500 mb thickness increases.
www.theweatherprediction.com /habyhints/269   (296 words)

  
 Halfbakery: Isothermal bubble pump heat engine
The goal is isothermal expansion: the pressure-volume product is constant and all of the energy removed from the hot walls of the tube is used to accelerate the moving fluid while the gas stays at constant temperature.
Isothermal compression starts in a tube which is almost horizontal and slopes down to the right.
The slugs of gas are at maximum volume for their temperature, which is cold because the isothermal compression tube is in thermal contact with the cold heat sink.
www.halfbakery.com /idea/Isothermal_20bubble_20pump_20heat_20engine   (3262 words)

  
 5.2.2.4 Hot Die and Isothermal Forging   (Site not responding. Last check: 2007-10-24)
Isothermal forging of these alloys requires special tooling materials, such as nickel-based superalloys and molybdenum alloys for dies, and lubricants that can perform adequately at these temperatures.
Special attention to the surrounding atmosphere is also important, such as the use of an inert gas or vacuum to protect both the dies and the workpiece from oxidation.
The primary advantages are closer forging tolerances resulting in reduced machining and material costs, a reduction in the number of preforming and blocking operations resulting in reduced processing and tooling costs, and the use of slow ram speeds resulting in lower forging pressures and the use of smaller machines.
www.forging.org /Design/pg5_2_2_4.html   (366 words)

  
 Isothermal Community College Admission: Vault Student Surveys
As a senior in high school it was mandatory for every student to take an Isothermal Placement test, this test was to determine what classes all of...
Isothermal offers two year associates of arts degrees with a job placement program to follow.
Isothermal is a small college so there is no need for on-campus housing.
www.vault.com /college-admissions/Isothermal-Community-College.html   (246 words)

  
 Isothermal process - Wikipedia, the free encyclopedia
An isothermal process is a thermodynamic process in which the temperature of the system stays constant: ΔT = 0.
This typically occurs when a system is in contact with an outside thermal reservoir (heat bath), and processes occur slowly enough to allow the system to continually adjust to the temperature of the reservoir through heat exchange.
Various parts of the cycle of some heat engines are carried out isothermally and may be approximated by a Carnot cycle.
en.wikipedia.org /wiki/Isothermal   (440 words)

  
 The momentum equation and the critical point   (Site not responding. Last check: 2007-10-24)
In that case the assumption of an isothermal wind would not be valid.
The point where the RHS of the momentum equation goes to zero is referred to as the Parker point after Eugene Parker, who described and solved the equations for the solar wind in 1958.
In an isothermal wind the critical point coincides with the sonic point, but this is not necessarily true for other wind models.
grus.berkeley.edu /~jrg/ay202/node103.html   (964 words)

  
 Isothermal v NFW halos
I plan to use an (approximated) analytical equation for the density at r of an isothermal halo in terms of the halos central density and core radius.
As for obtaining a core radius for that isothermal model, the differential equation describing an isothermal model must be solved numerically, and then the approximation is fitted to the actual solution.
The point behind the isothermal sphere is that it produces flat rotation curves at moderate radii.
www.physicsforums.com /showthread.php?p=881160   (1238 words)

  
 NetLogo Models Library: GasLab Isothermal Piston
"Isothermal" means that the temperature of the gas is not changed by moving the piston.
Note that there's a physical impossibility in the model here: in real life if you moved the piston in you would do work on the gas by compressing it, and its temperature would increase.
In this model the energy and temperature are constant no matter how you manipulate the piston, hence the name "isothermal".
ccl.northwestern.edu /netlogo/models/GasLabIsothermalPiston   (1063 words)

  
 The wind energy   (Site not responding. Last check: 2007-10-24)
For an isothermal wind the conservation of energy is contained in the condition
This condition is specific to the isothermal case and does not apply in general at the critical point.
for an isothermal wind is not constant, but that an energy equal to the sum of the two last terms has to be added throughout the wind to keep it isothermal.
astron.berkeley.edu /~jrg/ay202/node104.html   (194 words)

  
 Stirling Engine Ideal Isothermal Analysis (updated 11/11/2006)
This isothermal assumption makes it possible to generate a simple expression for the working gas pressure as a function of the volume variations.
The assumption of isothermal working spaces and heat exchangers implies that the heat exchangers (including the regenerator) are perfectly effective, with a spacial temperature distribution as indicated in the figure above.
This apparent paradox is a direct result of the definition of the Ideal Isothermal model in which the compression and expansion spaces are maintained at the respective cooler and heater temperatures.
www.ent.ohiou.edu /~urieli/stirling/isothermal/isothermal.html   (723 words)

  
 Isothermal process   (Site not responding. Last check: 2007-10-24)
Specifically adding heat isothermally will require the system to do positive work and hence that the volume increases while the pressure decreases.
Later we shall see that we cannot conceive of an engine which simply performs an isothermal expansion at all times because its volume would have to grow without bounds.
Thus other processes must be included in the thermal cycle of an engine and these eventually limit the efficiency of the conversion of heat into mechanical work.
www.pha.jhu.edu /~broholm/l35/node3.html   (183 words)

  
 Isothermal expansion   (Site not responding. Last check: 2007-10-24)
With regards to your question on isothermal process, we will be working on a molar basis and not kg because you are provided the molar quantity (n=1.0mol) of the gas in interest.
For the reversible isothermal expansion of an ideal gas, should I conclude that since the initial state and final state of the system are not at equilibrium hence delta G is not zero?
One mole of an ideal gas at 300 K is allowed to expand slowly and isothermally to twice its initial volume.
www.chemicalforums.com /index.php?topic=6997.msg31757   (3901 words)

  
 Thermal Modeling of Isothermal Cuboids . . .
The heat transfer performance of the heat sinks, as given by the Nusselt number, is determined for each test based on the isothermal body temperature and the square root of the wetted surface area.
In addition to the rectangular heat sinks, isothermal cuboids of various sizes are modeled using META where the cuboid is approximated as a thin uniformly heated base plate with an attached extended surface.
The cuboid results are compared with experimental data and an analytically based correlation.
www.aavidthermalloy.com /technical/papers/isothermal.shtml   (207 words)

  
 The isothermal atmosphere
As a first approximation, let us assume that the temperature of the atmosphere is uniform.
is called the isothermal scale-height of the atmosphere.
We have discovered that in an isothermal atmosphere the pressure decreases exponentially with increasing height.
farside.ph.utexas.edu /~rfitzp/teaching/sm1/lectures/node55.html   (574 words)

  
 Deltaphase Isothermal Pad
The Deltaphase® Isothermal Pad is based on the thermodynamic principle that a heat releasing phase change is isothermal, that is: that it occurs at constant temperature.
In this phase change, over 30 calories of heat are released per gram of solution, even though the temperature is constant.
The pad remains isothermal until all the liquid phase has solidified.
www.braintreesci.com /39dp.htm   (209 words)

  
 Isothermal Processes
For an ideal gas consisting of n =
moles of gas, an isothermal process which involves expansion from
The work done in expanding the gas is
hyperphysics.phy-astr.gsu.edu /hbase/thermo/isoth.html   (95 words)

  
 Temperature Calibration from Isothermal Technology
Isothermal Technology Ltd is involved with the research, development and manufacture of
Equipment produced includes Standard Platinum Resistance Thermometers, fixed point cells and associated equipment which are used in metrology laboratories throughout the world.
From metal block calibrators for calibrating thermocouples and RTDs to high accuracy comparison baths; it can all be found here.
www.isothermal.info   (92 words)

  
 Generalized isothermal sphere   (Site not responding. Last check: 2007-10-24)
Figure B1: Comparison of singular isothermal sphere (SIS), softened isothermal sphere used by OBS, and the luminosity profile determined by van der Marel (1994).
The isothermal models agree with the observed profile at small radii and continue to rise linearly with the dark matter halo.
Figure B1 compares the mass of the SIS with the softened isothermal sphere used by OBS, and van der Marel's (1994) estimate derived using the luminosity profile and dynamical modeling.
donald.phast.umass.edu /preprints/theory/m87/node12.html   (299 words)

  
 Chapter 4 Summary Notes
To determine the conversion or reactor volume for reversible reactions, one must first calculate the maximum conversion that can be achieved at the isothermal reaction temperature, which is the equilibrium conversion.
For isothermal microreactors, we use the same equations as a PFR as long as the flow is not laminar.
To accomplish this, a membrane that is permeable to that reaction product, but is impermeable to all other species, is placed around the reacting mixture.
www.engin.umich.edu /~cre/course/lectures/four/index.htm   (1186 words)

  
 Isothermal Dendritic Growth Experiment (IDGE)
The Isothermal Dendritic Growth Experiment (IDGE) is a fundamental microgravity materials science experiment to be flown as part of the second United States Microgravity Payload (USMP-2) aboard the Space Shuttle Columbia.
The exact mix of experiments is selectable by the principal investigator prior to flight and can be modified during flight from the Payload Operations Control Center (POCC) at the NASA Marshall Space Flight Center (MSFC) in Huntsville Alabama.
The temperature throughout the melt volume will be maintained isothermal within plus or minus 0.002 degree C. The acceleration during flight will be measured by using the NASA Lewis-developed Space Acceleration Measurement System (SAMS).
zeta.lerc.nasa.gov /expr2/idge.htm   (1446 words)

  
 Reduced Isothermal-Isobaric Ensembles
The preceding discussion should make clear that the complications of avoiding this limit are such that studying a larger system is the best recourse.
It is, therefore, formally and practically possible to generate configurations in the isothermal isobaric ensemble by assuming the first mode, only (end point or centroid), is coupled to the volume.
This approximation is equivalent to the finite polymer size approximation because limits of integration of the first mode, only, are, in this approximation, bound by the volume.
pages.nyu.edu /~mt33/PINPT/node11.html   (1058 words)

  
 Isothermal and adiabatic expansion
Suppose that the temperature of an ideal gas is held constant by keeping the gas in thermal contact with a heat reservoir.
If the gas is allowed to expand quasi-statically under these so called isothermal conditions then the ideal equation of state tells us that
This is usually called the isothermal gas law.
farside.ph.utexas.edu /teaching/sm1/lectures/node53.html   (188 words)

  
 Isothermal Community College (The Learning College)
Isothermal Community College is "Improving Life Through Learning"
Isothermal Community College -- "Improving Life Through Learning"
Best viewed at 1024x768 or higher resolution, IE 4.0 or later, Netscape 4.0 or later, 16bit color
tlc.isothermal.edu   (86 words)

  
 Advanced Cooling Technologies' Products - Isothermal Furnace Liners
An Isothermal Furnace Liner is a unique heat pipe that distributes heat within a furnace to wherever it is required to provide a stable, uniform temperature zone for a variety of applications mentioned above.
When a single uniform temperature zone is required, the IFL can provide this zone with a single heater and controller.
ACT introduced a new line of Ultra High Temperature Isothermal Furnace Liner (UHT-IFL) products in September 2004.
www.1-act.com /ifl.html   (209 words)

  
 isothermal - OneLook Dictionary Search
Tip: Click on the first link on a line below to go directly to a page where "isothermal" is defined.
Isothermal : Online Plain Text English Dictionary [home, info]
Phrases that include isothermal: isothermal community college, isothermal compressibilit, isothermal compressibility, isothermal equilibrium, isothermal expansion, more...
www.onelook.com /?w=isothermal   (185 words)

  
 Universidade do Minho: Registo 1822/220
The experimental problems related with the recording of data for this type of crystallisation are also analysed and discussed.
As a further test of the validity of the theoretical models, and as a justification for the use of isothermal crystallisation data to model non-isothermal processes, the (timedependent) real sample temperature increase in nominally isothermal experiments was quantified.
The isothermal process was then treated as a truly non-isothermal one, from the (low thermal conductivity) sample’s standpoint.
repositorium.sdum.uminho.pt /handle/1822/220   (224 words)

  
 NimbleGen Systems, Inc. - Comparative Genomic Hybridization
Ultra-high resolution detection of small deletions and amplifications, as well as breakpoint mapping to less than 500 bp intervals, can be achieved using NimbleGen's fine-tiling arrays with probes as dense as 10 bp spacing.
NimbleGen's exclusive isothermal array design approach enables uniform probe performance, eliminating hybridization artifacts and/or bias and providing higher quality data.
With a capacity of 385,000 isothermal probes, NimbleGen's high-density, long oligo arrays span the entire non-repetitive regions of the human genome in a single array, tiling the full genome at a median probe spacing of 6,000 bp.
www.nimblegen.com /products/cgh   (1044 words)

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