properties of ethylene glycol-water mixtures

Formulating Water

counterparts based on ethylene oxide (EG-glycolethers) Replacing CUIIently used EG-glycol etherswith the PG-glycol seems simple enough particularly ifevapora tionrates and solubility parameters are matched Table 1 compiles key physical properties that are important in choos-3801 WeslChest9rPike NewtownSquare PA 19073

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Corrosion behavior of several metals in ethylene glycol

article{osti_5275662 title = {Corrosion behavior of several metals in ethylene glycol-base heat-transfer fluids under conditions encountered in solar energy systems} author = {Zeman G J } abstractNote = {The corrosion behavior of aluminum copper and iron in inhibited ethylene glycol-ASTM corrosive water solutions was evaluated in a laboratory loop under isothermal and heat-flux

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How to Estimate the Heat of Vaporization of Mixtures for

Jan 13 2017The calculation of the heat of vaporization of pure components (latent heat) is very straightforward This topic is usually explored in thermodynamics undergraduate courses The latent heat is calculated at constant pressure (isobaric process) and the vaporization of a pure component occurs at constant temperature (isothermal process ) and of course constant composition

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Thermal Conductivity of Ethylene Glycol

Figure 1: Thermal Conductivity of Ethylene Glycol-Water Mixtures Unlike the methods employed in the article the THW-L2 can identify the thermal conductivity of a liquid or paste in a much simpler way This is accomplished by preparing a small sample of the liquid or paste pouring it into the sample holder and vertically inserting a sensor

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dynamic viscosity of ethylene glycol at 20 degrees celsius

The density viscosity and thermal conductivity of ethylene glycol + water diethylene glycol + water and triethylene glycol + water mixtures were measured at temperatures ranging from 290 K to 450 K and concentrations ranging from 25 mol % glycol to 100 mol % glycol

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REFPROP

Enhancements have been made to most areas of the NIST REFPROP program including the nist-equations of state for many of the pure fluids and mixtures the transport nist-equations the graphical interface the Excel spreadsheet the Fortran files (i e core property routines) the sample programs in Python C++ MATLAB VB etc

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Corrosion

The corrosion of aluminum alloy in the presence of ethylene glycol is most likely a result of acidic attack by these acids It is known that impurities often found in ethylene glycol/water mixtures such as ferric copper and chloride ions can accelerate this corrosion Corrosion problems with ethylene glycol/water mixtures can be minimized or eliminated by using ethylene glycol that

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Specific Gravity Charts

ETHYLENE GLYCOL THE ORIGINAL SPECIFIC GRAVITY CONVERSION CHARTS ETHYLENE GLYCOL PROPYLENE GLYCOL The Conversion Charts below are to be used with the PPE Precision Specific Gravity Hydrometer and Beaker After placing a sample of the glycol in the beaker check the reading on the hydrometer and match

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15 1 3 Defining Properties for the Mixture and Its

15 1 3 Defining Properties for the Mixture and Its Constituent Species As discussed in Section 15 1 1 if you use a mixture material from the database most mixture and species properties will already be defined You may follow the procedures in this section to check the current properties modify some of the properties or set all properties for a brand-new mixture material that you are

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Experimental Analysis on Thermophysical Properties of

Hybrid nanofluid is the new generation of heat transfer fluid for various heat transfer applications where transport characteristics are substantially higher than the base liquid The study presents an experimental investigation of rheological and thermophysical properties of Al2O3/ CuO hybrid nanoparticles suspended in 25:75 (by weight) ethylene glycol and water mixture

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The Activity and Other Thermodynamic Properties of

to their dielectric properties miscibility with water primary and secondary medium effects and other thermodynamic properties Activity and other thermodynamic properties of hydrochloric acid were determined from the electromotive force measurements of the cell Pt H2 (l atm )| HC1 (m) Tetrahydrofuran Water] AgCl Ag over a wide

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al otaibi ethylene glycol

ethylene glycol as antifreeze have excellent heat transfer properties and higher boiling points than pure water Ethylene glycol solutions are also extensively used as industrial heat transfer agents It is also used as a heat-transfer fluid in aircraft and runway de-icing mixtures to provide freeze-thaw stabilization to latex coatings to

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Thermal design and analysis of cold plate with various

water and the influence of Ethylene Glycol and water mixture on the TWT Temperature pressure drop across the channels is estimated theoretically and is verified with the Computational Fluid Dynamics software by simulating the system Table 1: 0Ethylene glycol solution properties at 26 7 C

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Nucleate Boiling Heat Transfer from a Localized Heat

The property variations of ethylene glycol/water mixtures with concentration are distinctly different from those of alcohol/water mixtures As increasing amounts of alcohol are added to water at a fixed pressure the surface tension decreases the bubble point temperature decreases and the latent heat first decreases rapidly and then very slowly

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ph of propylene glycol water mixture density

Ethylene Glycol Heat-Transfer Fluid The density of ethylene glycol is higher than water - check the specific gravity (SG) table above so the net impact on the heat transport capacity is reduced Example - the specific heat of an ethylene glycol water solution 50% / 50% is 0 815 at 80 o F (26 7 o C) Specific gravity at the same conditions is

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Brillouin spectroscopy investigations of poly(ethylene

Brillouin spectroscopy has been applied to study a synthetic polymer and its solutions in polar and nonpolar solvents Of particular interest has been the effect of concentration temperature and polarity of the solvent on the mechanical properties of the mixtures studied

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Thermodynamic solvation of a series of homologous α

Dutta S C and Lahiri S C (1995) Studies on the dissociation constants and solubilities of amino acids in ethylene glycol + water mixtures Journal of Indian Chemical Soceity 72 315 Marcus Y (1985) Ion solvation John Wilcy and Sons New York 37

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The Effects of Propylene Glycol on Pump Performance

The issue with this is that the glycol/water solution has a large impact on the pump power required for any given circuit This is due to two significant differences in the physical properties of a glycol/water mixture compared to a pure water fluid (which is usually used for pump/pipe calculations) 1

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Table 8

Table 8-3-1 - Properties of mixture Water/Glycol Extract from VDI-Warmeatlas Dd 17- VDI-Verlag Dusseldorf 1991 Substance and % by volume in mixture: Minimal working temperature [o C] Temperature [o C] Density [kg/m 3] Specific heat [kJ/kg K] Thermal conductivity [W/m K] Dynamic viscosity X10-3 [N s/m 2] Cinematic viscosity X10-6 [m 2 /s] Monoethylenglycol C2H4(OH)2 20-10-10 0 20 40 60

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REFPROP

Enhancements have been made to most areas of the NIST REFPROP program including the nist-equations of state for many of the pure fluids and mixtures the transport nist-equations the graphical interface the Excel spreadsheet the Fortran files (i e core property routines) the sample programs in Python C++ MATLAB VB etc Some of the more important improvements are listed below:

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Artculo de investigacin cientfica Volumetric properties

Artculo de investigacin cientfica Volumetric properties of (PEG 400 + water) and (PEG 400 + ethanol) mixtures at several temperatures and correlation with the Jouyban-Acree model Gerson A Rodrguez 1 Andrs R Holgun Fleming Martnez1* Maryam

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Physical Properties of Glycerine

Physical Properties of Glycerine T HE extremely wide range of uses for glycerine is due in large mea- sure not to a single property but to its unique combination of properties Nature made glycerol the most widely distributed of the polyhydric alcohols as combined in fats and other lipids essential to life pro-

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Ethylene glycol

Production Industrial routes Ethylene glycol is produced from ethylene (ethene) via the intermediate ethylene oxide Ethylene oxide reacts with water to produce ethylene glycol according to the chemical equation: C 2 H 4 O + H 2 O → HO−CH 2 CH 2 −OH This reaction can be catalyzed by either acids or bases or can occur at neutral pH under elevated temperatures

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