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Topic: Saturation Pressure


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  VAPORIZATION - LoveToKnow Article on VAPORIZATION   (Site not responding. Last check: 2007-09-14)
Supposing that the external pressure and temperature remain constant, the partial pressure of the gas inside the bubble varies inversely as the volume of the bubble, and may be represented by a/ri.
The tota/ heat of the saturated vapour at any temperature is usually defined as the quantity of heat required to raise unit mass of the liquid from any convenient zero up to the temperature considered, and then to evaporate it at that temperature under the constant pressure of saturation.
The pressure under which the liquid is heated makes very little difference to the quantity h, but, in order to make the statement definite, it is desirable to add that the liquid should be heated under a constant pressure equal to the final saturation-pressure of the vapour.
www.1911encyclopedia.org /V/VA/VAPORIZATION.htm   (9992 words)

  
 SKEW-T TUTOR
Vapor pressure and saturation vapor pressure are found by moving a parcel of air from original pressure level isothermally to the 622 mb pressure surface and reading off the saturation mixing ratio.
Saturation vapor pressure is the pressure in millibars found graphically on Skew-T by using the temperature.
This is the pressure level in the atmosphere that a RH of 100% first occurs when air at the surface is heated to a sufficient temperature that allows the air to rise buoyantly on its own.
www.theweatherprediction.com /thermo/skew-T_tutor   (2113 words)

  
 Thunder Scientific Corporation - Humidity Generation and Calibration Equipment
The saturation temperature is governed by the temperature of this medium, which is digitally controlled by the computer at any value between -80 °C and 12 °C through the use of PID (proportional-integral-derivative) algorithms.
Saturation pressure and mass flow are measured continuously and controlled using PID algorithms similar to those employed in temperature control.
The saturator is maintained at the required saturation temperature and saturation pressure.
www.humidityinstruments.com /humidity_equipment/model_3900.html   (812 words)

  
 VARIA - LoveToKnow Article on VARIA   (Site not responding. Last check: 2007-09-14)
The values of the coaggregation-volume c, which form the starting-point of the calculation, are found by taking ii f 0/3 for convenience of division in formula (13).
The latent heat L (formula 9) is found by subtracting from H (equation 15) the values of the heat of the liquid h given in the same article.
The values of the specific heat in the next column are calculated for a constant pressure equal to that of saturation by formula (16) to illustrate the increase of the specific heat with rise of pressure.
60.1911encyclopedia.org /V/VA/VARIA.htm   (654 words)

  
 METHODS
Saturation pore pressure is a kind of passive pore pressure induced in the specimen by a hydraulic pump.
The pore pressure during consolidation and compression stages is defined as back pressure, as it rises in the tested specimen as a reaction to cell pressure and piston load.
The cell pressure was increased, starting from the final cell pressure of the saturation stage, while the formerly applied saturation pore pressure was maintained.
www-odp.tamu.edu /publications/186_SR/115/115_3.htm   (1500 words)

  
 Water Vapor Pressure Versus Temperature -   (Site not responding. Last check: 2007-09-14)
Sketch the curve of saturation vapor pressure versus temperature.
Saturation vapor pressure is the pressure that water vapor molecules escaping from...
Saturation vapor pressure is the pressure that water vapor.
versus.fhyl.com /index.php?k=water-vapor-pressure-versus-temperature   (1129 words)

  
 Compressed Air Glossary of Terms :: H :: Pneumatic Manufacturer Directory @ Pneumatic-Source.com
Regeneration of the desiccant is accomplished at atmospheric pressure, using steam or electric heaters, embedded in the desiccant bed.
A valve which connects the high pressure side of a compressed air system to the suction side and is adjusted so as to maintain a specific pressure on the suction side by controlled bleeding of hot gas to the suction side.
The relative humidity of a gas (or air) vapor mixture is the ratio of the partial pressure of the vapor to the vapor saturation pressure at the dry bulb temperature of the mixture.
www.pneumatic-source.com /resources/glossary/h.shtml   (731 words)

  
 Trexel, Inc. - Technical Papers and Presentations
Since pressure can also be a factor for cell nucleation, he later made more detailed investigations with Kim (8) on both shear stress and pressure on the nucleation with the same material and blowing agent.
During extrusion process, the head pressure is generally higher than the saturation pressure for the gas contained in the polymer.
When the polymer was saturated (the pressure curve became completely flat), the speed of the rotor was increased to about 240 rpm (giving a shear rate of about 200 1/s) for about 20 seconds, then stopped (the rotor stopped instantly because of the break system).
www.trexel.com /techpp/shear.html   (2341 words)

  
 [No title]
High driving pressures fill the pore body to a point where the radius of curvature in the boundary pore throats is small; hence, further into the boundary pore throats, and thus, more of the pore body is filled with the NAPL and the saturation is higher.
The scaling ratio for the empirically determined capillary entry pressure for this media was 5.59, this suggests that 18% of the driving pressure was opposed by capillary effects and 82% of the driving pressure was opposed by viscous pressure drop.
This net capillary entry pressure is the summation of the restricting capillary entry pressure at the front of the body and the promoting pressure due to the curvature of the interface in tension of the aft end of the NAPL body.
members.aol.com /mercer43/rpsnn2.htm   (16549 words)

  
 Applications (Engineering Thermodynamics) - Wikibooks
If the partial pressure of the vapor is smaller than the saturation pressure for water for that temperature, the mixture is called unsaturated.
The relative humidity φ is the ratio of the vapor pressure to the saturation vapor pressure at that temperature, i.e.
The output of the condenser is throttled to a lower pressure in the throttling valve, and sent to the evaporator which absorbs heat.
en.wikibooks.org /wiki/Applications_(Engineering_Thermodynamics)   (2848 words)

  
 NESC0853: SURGTANK, Steam Pressure, Saturation Temperature or Reactor Surge Tank   (Site not responding. Last check: 2007-09-14)
It is capable also of providing the pressure and saturation temperature history, starting from thermodynamic equilibrium conditions, for the same tank sub- jected to an outsurge described by a time history of liquid levels.
The assumed pressure is adjusted and the associa- ted change in entropy recalculated until a pressure is attained for which no change occurs.
SURGTANK assumes a slightly in- creased pressure for the end of the first level, the inner tank sur- face is assumed to follow saturation temperature, linearly with time, throughout the interval, and the heat transferred to the walls and down into the liquid content of the tank is computed.
www.nea.fr /abs/html/nesc0853.html   (812 words)

  
 Temp, Humidity & Dew Point ONA
(BeK) Vapor pressure (e) is the fraction of the ambient pressure that is due to the fraction of water vapor in the air.
Saturation vapor pressure (es) is the maximum vapor pressure that the air can support (non supersaturated) at a given temperature.
Saturated vapor pressure (es): es = 6.1078 * 10 ** ((T * A)/(T + B)) \ temperature in C A = 7.5 } for use in vapor pressure B = 237.3 } with respect to WATER * A = 9.5 } for use in vapor pressure B = 265.5 } with respect to ICE 3.
www.faqs.org /faqs/meteorology/temp-dewpoint   (2418 words)

  
 Water Vapor Pressure Formulations
There is a large number of saturation vapor pressure equations used to calculate the pressure of water vapor over a surface of liquid water or ice.
It is important to note that in the upper troposphere, water vapor measurements reported in the WMO convention as relative humidity with respect to liquid water depend critically on the saturation vapor pressure equation that was used to calculate the RH value.
Goff, J. Saturation pressure of water on the new Kelvin temperature scale, Transactions of the American society of heating and ventilating engineers, pp 347-354, presented at the semi-annual meeting of the American society of heating and ventilating engineers, Murray Bay, Que.
cires.colorado.edu /~voemel/vp.html   (1158 words)

  
 Armfield - Thermodynamics Datasheets
Saturated steam leaving the top of the boiler passes around the pipe loop before condensing and returning to the base of the boiler for re-heating.
The steam expands to atmospheric pressure as it is throttled and a second PRT temperature sensor measures the temperature of the steam following expansion.
Temperatures in the pipe loop and inside the throttling calorimeter are measured using PRT sensors and pressure in the loop is measured using an electronic pressure sensor.
www.armfield.co.uk /data_th3.html   (837 words)

  
 Equations - Air Density and Density Altitude
Although relative humidity can be used to determine the vapor pressure, the value of relative humidity is strongly affected by the ambient temperature, and is therefore constantly changing during the day as the air is heated and cooled.
Relative humidity is defined as the ratio (expressed as a percentage) of the actual vapor pressure to the saturation vapor pressure at a given temperature.
Using these equations, the altimeter setting may be readily converted to actual pressure, then by using the actual pressure along with the temperature and dew point, the local air density may be calculated, and finally the density may be used to determine the corresponding density altitude.
www.wahiduddin.net /calc/density_altitude.htm   (3829 words)

  
 Variable saturation pressure   (Site not responding. Last check: 2007-09-14)
Saturation pressure is used to denote bubble point pressure   for oil or dew point pressure for gas.
In two phase region gas saturation is non-zero and a new value is computed for each time step.
The bubble point pressure is introduced as a new variable in one-phase region.
www.ux.his.no /~restek/komp/node11.html   (340 words)

  
 Mount Washington Observatory: Glossary of Weather Terms   (Site not responding. Last check: 2007-09-14)
The vapor pressure in the air is in equilibrium with the vapor pressure over a plane surface of pure water so that the rate of evaporation and condensation are equal.
The saturation vapor pressure is temperature dependent, which differs for a flat or curved liquid surface (such as a spherical droplet).
This is because the saturation vapor pressure over ice is less than that over water, allowing vapor deposition onto the ice.
www.mountwashington.org /glossary/gloss.html   (2233 words)

  
 Engine saturation
Saturation of your key words - search engine saturation basically means the amount of pages a specified...
The saturation pressure is the pressure at which the cryogenic liquid boils to...
Saturation is a good intent to choose for images in which the actual color...
www.realppc.com /engine-saturation.html   (1199 words)

  
 CMG Cmgprop User's Manual   (Site not responding. Last check: 2007-09-14)
For the calculation of saturation pressures and temperatures, the QNSS algorithm is allowed to proceed until convergence to the standard tolerance (1.0E-10) is achieved or the maximum iteration limit is reached.
The difference between the viscosity of a phase at reservoir pressure and at atmospheric pressure is computed using the Jossi, Stiel, and Thodos formula (AIChE J 8, 59(1962)).
The GOR and API gravity depend only on the second EOS parameter set whereas the formation volume factor is a function of both sets since in the saturation pressure calculation the first set values are utilized whereas in determining the residual oil properties the second EOS parameter set is utilized.
ekofisk.stanford.edu /software/cmgprop.html   (5137 words)

  
 Saturation Vapor Pressure - Dependence on Air Temperature   (Site not responding. Last check: 2007-09-14)
Saturation Vapor Pressure - Dependence on Air Temperature
Saturation vapor pressure is dependent on the temperature of a gas according the the graph to the right -->>
Q: For an unsaturated parcel of air at a given temperature, there are two ways to saturate it where the vapor pressure will then equal the saturation vapor pressure...
apollo.lsc.vsc.edu /classes/met130/notes/chapter5/es_temp.html   (56 words)

  
 Hydrogen sulfide
However, since it is very soluble in water, the presence of water in soil or falling as precipitation at the time of the spill may contribute to movement in the soil.
If the soil surface is saturated with moisture at the time of the spill as might be the case after a rainfall, the spill chemical will runoff and/or evaporate away.
Derivation: 1) By the action of dilute sulfuric acid on a sulfide, usually iron sulfide; 2) by direct union of hydrogen and sulfur vapor at a definite temperature and pressure; 3) as a by-product of petroleum refining.
www.gasdetection.com /TECH/h2s.html   (11417 words)

  
 RESERVOIR ANALYSIS   (Site not responding. Last check: 2007-09-14)
Along with the porosity and permeability values for each selected net overburden pressure, Klinkenberg Slip Factor is also calculated.
Determination of saturation pressure of a subsurface sample at reservoir temperature or surface samples at separator temperature Partial pressure-volume relations included
Continous CO injection, cyclic CO injection, CO slug injection, huff and puff CO injection and CO mobility control by foam tests are designed according to the Client’s requirements and prices are given by quotation.
www.tpao.gov.tr /research/res_web/reservoiranalyses.htm   (1103 words)

  
 Research Publications   (Site not responding. Last check: 2007-09-14)
Evaluation of a first-order water transfer term for variably saturated dual-porosity flow models.
Experimental investigation of solute transport in large, homogeneous and heterogeneous, saturated soil columns.
Wettability effects on scaling two- and three-fluid capillary pressure saturation relations.
www.ussl.ars.usda.gov /pls/caliche/Publication.display?s=1101&e=1344   (4323 words)

  
 pty_saturation_pressure_point   (Site not responding. Last check: 2007-09-14)
A condition of pressure and temperature of a fluid at which the vapor phase begins to evolve from a liquid phase in equilibrium.
Attribute Flags Data Type From property: data_collection IV set[0..
other_spatial_object I other_spatial_object may be a property of data_value MN ndt_bubble_point_pressure_point The value of the saturation pressure and temperature.
www.august.com /epicentre/inherit/pty_saturation_pressure_point.html   (150 words)

  
 [No title]
0 && *pressure > 0 && *saturation_pressure > 0) if (fabs (*pressure - *saturation_pressure) / *saturation_pressure
0 && *entropy > 0) *pressure = phs (enthalpy, entropy); enthalpy_done = TRUE; entropy_done = TRUE; /* check if was able to calculate pressure, if so calculate quality and set...done...
to TRUE */ if (*pressure > 0) { /* calculate the saturation temperature based on pressure */ if (*pressure
www.winsim.com /steam/steam.c   (262 words)

  
 Saturation Pressure -Motocross / Supercross / Dirtbikes - Advanced Technology & Engineering
Saturation Pressure -Motocross / Supercross / Dirtbikes - Advanced Technology and Engineering
I am trying to figure out the formula for calculating Relative Air Density, and all I have left to figure out is the formula for Saturation Pressure.
I have searched all over the net and in old posts and I cannot find it anywhere.
www.dirtrider.net /forums3/showthread.php?t=60532   (132 words)

  
 [No title]
Calculated pressure = %11.3 psia\n", "Temperature = %11.3f F
option == 2) shvptd = shpvt3 (&shvptd, temperature, option); } else shvptd = shvpt2 (pressure, temperature, option); } if (*quality
T1) { temp = 0.0; shvptl = vptx3 (pressure, temperature, &temp); if (option == 1
www.winsim.com /steam/steam2.c   (191 words)

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