Glycol acts as an antifreeze, while maintaining very efficient heat transfer. Nippon Kagaku. Propylene glycol (IUPAC name: propane-1,2-diol) is a viscous, colorless liquid, which is nearly odorless but possesses a faintly sweet taste.Its chemical formula is CH 3 CH(OH)CH 2 OH. Chaleurs de formation de l'oxyde d'ethylene, de l'ethanediol et de quelques homologues, Included in the guide are: a brief introduction to DOWFROST fluids, typical product specifications, system design and preparation guidelines, glycol concentration and dilution water quality information, plus detailed engineering data including density, viscosity, specific heat and thermal conductivity. Dynalene propylene glycols are intended for use in secondary heating and cooling applications, burst and freeze protection of pipes, and various deicing and snow melting systems. In food processing systems the common heat-transfer fluid is based on propylene glycol. Chem., 1927, 31, 1842-1855. [all data], Parks and Huffman, 1927 Containing premium multi-metal corrosion and scale inhibitors that are NSF (BuildCERT) approved and endorsed by the Energy Saving Trust. Ethylene Glycol based water solutions are common in heat-transfer applications where the temperature in the heat transfer fluid can be below 32 o F (0 o C).Ethylene glycol is also commonly used in heating applications that temporarily may not be operated (cold) in surroundings with freezing conditions - such as cars and machines with water cooled engines. Was ist Propylene Glycol? Specific gravity of propylene glycol solutions: 1) Specific gravity based on propylene glycol solutions with temperature 60oF. We don't collect information from our users. Containing two alcohol groups, it is classed as a diol.It is miscible with a broad range of solvents, including water, acetone, and chloroform.In general, glycols are non-irritating and have very low volatility. C p,gas: Ideal gas heat capacity (J/mol×K). °F)), three quarters that of pure water, thus requiring increased flow rates in same … [all data], Cox and Pilcher, 1970 Chim. Propylene Glycol based products. ; Constant pressure heat capacity of liquid, Enthalpy of combustion of liquid at standard conditions, Enthalpy of formation of liquid at standard conditions. Curme and Johnston, Reinhold Publishing Corp., New York (1952). You can target the Engineering ToolBox by using AdWords Managed Placements. on behalf of the United States of America. The thermochemical study of 1,2-alkanediols at 298.15 K, for DOWFROST® inhibited propylene glycol-based heat transfer fluids. Studies on glass. All rights reserved. DH - Eugene S. Domalski and Elizabeth D. Hearing, Go To: Top, Condensed phase thermochemistry data, Notes, Knauth and Sabbah, 1990 Propylene. NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data) Propylene glycol, another common coolant, has an even lower specific heat. The density, viscosity, and thermal conductivity of propylene glycol + water, dipropylene glycol + water, and tripropylene glycol + water mixtures were measured at temperatures ranging from 290 K to 460 K and concentrations ranging from 25 mol % glycol to 100 mol % glycol. Acta, 1990, 164, 145-152. They are alcoholic compounds due to the presence of –OH groups. Some of our calculators and applications let you save application data to your local computer. For many heat-transfer applications it is necessary to use a heat-transfer fluid with lower freezing point than water. [all data], Gardner and Hussain, 1972 IV. Please read AddThis Privacy for more information. France, 1937, 4, 637-647. The standard enthalpies of formation of some aliphatic diols, Your institution may already be a subscriber. All rights reserved. These applications will - due to browser restrictions - send data between your browser and our server. [all data], Zaripov, 1982 Database and to verify that the data contained therein have Specific Heat Capacity Of Ethylene Glycol Mixed With Water - posted in Student: Hi, Ive googled around the web looking for the specific heat capacity of propylene glycol on water, (Ive found only the one for the ethylene glycol) Can someone tell me where to find a table for the specific heat capacity of propylene glycol on water? Inhibited glycol solutions are widely used for engine cooling and other heat transfer applications in which low temperature (<32°F) protection is needed. Joback Method; NIST Webbook; Crippen Method; Δ c H° liquid: Standard liquid enthalpy of combustion (kJ/mol). Energetics of inter- and intramolecular bonds in alkanediols. The purpose of the fee is to recover costs associated The most common antifreeze fluid - ethylene glycol - must not be used where there is a chance of leakage to potable water or food processing systems. Assuming a 100-gpm (gallons/minute) coolant flow rate and an energy loss through the coolant system of … Moureu, H.; Dode, M., Sentry Propylene Glycol; Sirlene; Solar winter ban; Solargard P; Trimethyl glycol; Ucar 35; propanediol; propylene glycol (1,2-propanediol) «alpha»-Propylene glycol; Sources. Therefore, the non-toxic, propylene glycol is preferred. These secondary refrigerants are available neat or preblended to specific requirements. The series of Dynalene propylene glycol coolants are blended with specially formulated Dynalene additive packages depending on your system’s specifications. Thermodyn., 1972, 4, 819-827. As it pertains to the transfer of heat from the engine to the cooling system the best fluid available is pure water. Gardner, P.J. Transcribed Image Text Part 1: Measure the specific heat of a solution The videos below show solutions of propylene glycol and water being heated by an immersion heater used to heat water for tea or coffee. Performance of Equation 2-29 for viscosity of aqueous mixture of Propylene Glycol (Experimental data collected from ASHRAE (2001))..... 45 Figure 2-11. I. Technology, Office of Data Specific heat of propylene glycol solutions: 1 Btu/ (lbmoF) = 4186.8 J/ (kg K) = 1 kcal/ (kgoC) Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. in these sites and their terms of usage. To improve system efficiency and reduce operating costs, a DTX or Potassium Formate based heat transfer fluid is worth consideration. A mixture of 60% propylene glycol and 40% water (60:40 PG/W) by mass is most commonly used in subarctic climate, which has the lowest freezing temperature (−51.1 °C) among glycol and water mixtures. Knauth, P.; Sabbah, R., [all data], Moureu and Dode, 1937 The Heat Capacity, Vapor Pressure, Heats of Fusion and Vaporization. Data compiled as indicated in comments: with the development of data collections included in Heat capacities of aqueous solutions of ethylene glycol, propylene glycol and 1,3-butanediol, Parks, G.S. NIST Standard Reference AddThis use cookies for handling links to social media. Bull. propylene glycol-based heat transfer fluids. Only emails and answers are saved in our archive. ; Hussain, K.S., Data from NIST Standard Reference Database 69: The National Institute of Standards and Technology (NIST) Propylene glycol is also used to create artificial smoke or fog used in fire-fighting training and in theatrical productions. [all data], Go To: Top, Condensed phase thermochemistry data, References. The main difference between ethylene glycol and propylene glycol is that ethylene glycol is toxic whereas propylene glycol is … Data Program, but require an annual fee to access. Doch was ist richtig? © 2018 by the U.S. Secretary of Commerce However, NIST makes no warranties to that effect, and NIST J. Phys. ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein The inhibitors in Dow glycol-fluids are specially formulated to protect system components against corrosion and scaling that can increase maintenance and operating expense, reduce system efficiency and even lead to system failure. Read more . See also tabulated values of specific heat of gases, food and foodstuff, metals and semimetals, common solids and other common substances as well as values of molar heat capacity of common organic substances and inorganic substances. errors or omissions in the Database. 9.7 Specific Gravity: 1.04 at 20°C (liquid) 9.8 Liquid Surface Tension: 36 dynes/cm = 0.036 N/m at 25°C 9.9 Liquid Water Interfacial Tension: Not pertinent 9.10 Vapor (Gas) Specific Gravity: Not pertinent 9.11 Ratio of Specific Heats of Vapor (Gas): 1.073 9.12 Latent Heat … Kawaizumi, F.; Otake, T.; Nomura, H.; Miyahara, Y., Figure 2-10. Thermochim. shall not be liable for any damage that may result from ; Pilcher, G., Propylene glycol is clear, colorless, slightly syrupy liquid at room temperature. Google use cookies for serving our ads and handling visitor statistics. Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! Propylene Glycol: Propylene Glycol is used as a solvent for intravenous, oral, and topical pharmaceutical preparations. Pro­py­lene Glycol werden die unter­schied­lichsten Eigen­schaften zuge­schrieben. Cox, J.D. and Informatics, Computational Chemistry Comparison and Benchmark Database, NIST / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data), NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data). A range of heat transfer fluids including ethylene and propylene glycol. Please read Google Privacy & Terms for more information about how you can control adserving and the information collected. NIST subscription sites provide data under the Dow glycol-based fluids include inhibited ethylene glycol (EG) and propylene glycol (PG)-based fluids. Propylene Glycol solutions have poorer heat transfer characteristics than other glycols and are relatively viscous at temperatures below -20C, often necessitating larger pipe-work, heat exchangers and pumps. Kaishi, 1972, 1972, 1733-1776. HEAT TRANSFER FLUID - PROPYLENE GLYCOL Typical Physical Properties ♦ Propylene glycol 95% ♦ Inhibitor Package & Water 5% ♦ Color Colorless ♦ pH of solution @ 50% glycol 9.0 – 10.5 ♦ Specific gravity @ 60/60 °F 1.050 – 1.060 ♦ Reserve Alkalinity (min) 11.0 ml Experimental study of the isobaric heat capacity of liquid organic compounds with molecular weights of up to 4000 a.e.m., 1982, Teplomassoobmen Teplofiz. Boiling points of propylene glycol solutions: Specific heat of propylene glycol solutions: Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro .Add the Engineering ToolBox extension to your SketchUp from the SketchUp Pro Sketchup Extension Warehouse! such sites. We don't save this data. Non-toxic, biodegradable and virtually odorless. Normal Operation – During normal operation you do NOT want to operate with propylene glycol as this coolant does not have the same density and therefore heat transfer capacity as ethylene glycol. Follow the links above to find out more about the data been selected on the basis of sound scientific judgment. The specific heat for some commonly used liquids and fluids is given in the table below. Industrial propylene glycol is used as a heat transfer medium, to control viscosity, to dissolve active agents or protect against corrosion and pressure burst. The transition between the glassy and liquid states in the case of some simple organic compounds, necessary to indicate the temperatures of both the glycol and water. Data compilation copyright Ethylene glycol and propylene glycol are organic compounds. Soc. ; Huffman, H.M., However, when toxicity is a concern, such as with food applications or where contact with drinking water is possible, propylene glycol is used because it has a lower acute If you want to promote your products or services in the Engineering ToolBox - please use Google Adwords. C p,liquid: Constant pressure heat capacity of liquid: Δ c H° liquid: Enthalpy of combustion of liquid at standard conditions: Δ f H° liquid: Enthalpy of formation of liquid at standard conditions Zaripov, Z.I., the That means that 21.1 Joules of energy are added every second. Next Previous. glycol-based coolants, therefore ethylene glycol will provide better heat transfer than propylene glycol across the entire temperature range, as depicted in Figure 1 below. J. Chem. Propylene Glycol . Cookies are only used in the browser to improve user experience. [all data], Kawaizumi, Otake, et al., 1972 Specific Heat of Aqueous Propylene Glycol Solutions Specific Heat Chart Specific Heat of Aqueous Propylene Glycol Solutions Source: Glycols. uses its best efforts to deliver a high quality copy of the Freezing point of propylene glycol based water solutions at different temperatures: Due to slush creation - a propylene glycol and water solution should not be used close to freezing points. by the U.S. Secretary of Commerce on behalf of the U.S.A. The Third Law of Thermodynamics and Orientation Equilibrium in the Solid Forced convective heat transfer studies on glycol based magnesium oxide nanofluids flowing through straight tubes and helical coils under laminar flow and constant wall temperature conditions have been conducted. National Institute of Standards and Welcome to the Propylene Glycol Website. Specific heat of aqueous mixture of Ethyl Alcohol (Experimental data collected from Westh … Conclusion. ARTIC-GARD: 95/5 Inhibited Propylene Glycol; Economical formulation of 95.5% propylene glycol, dipotassium phosphate and deionized water offers good heat transfer characteristics, freeze and corrosion protection and low volatility. Other names for propylene glycol are 1,2-dihydroxypropane, 1,2-propanediol, methyl glycol, and trimethyl glycol. It may exist in air in the vapor form, although propylene glycol must be heated or briskly shaken to … The heating coil adds energy to the liquid at a rate of 21.1 Watts. Copyright for NIST Standard Reference Data is governed by Standard Reference Data Act. Part 1: Measure the specific heat of a solution The videos below show solutions of propylene glycol and water being heated by an immersion heater used to heat water for tea or coffee. That means that 21.1 Joules of energy are added every second. T = 91 to 277 K. Value is unsmoothed experimental datum. The heating coil adds energy to the liquid at a rate of 21.1 Watts. Propylene Glycol based Heat-Transfer Fluids, Calculate volume expansion volume in a heating/cooling system, en: propylene glycol water freezing points, es: propileno puntos de congelación del agua glicol. Kj/Mol ) out more about the data in these sites and their of... & Terms for more information about how you can control adserving and the information collected fluids is in. Indicate the temperatures of both the glycol and water worth consideration, Academic Press, New York, 1970 1-636. 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Available neat or preblended to specific requirements formulated Dynalene additive packages depending on your ’... Our ads and handling visitor statistics, but require an annual fee to access Saving Trust 1... At a rate of 21.1 Watts available is pure water Google use cookies for handling links to media! Serving our ads and handling visitor statistics links to social media with specially formulated Dynalene additive packages depending your... Syrupy liquid at room temperature NSF ( BuildCERT ) approved and endorsed by Standard! Are saved in our archive out more about the data in these sites and their Terms of.... Your products or services in the browser to improve user experience J. Phys these sites their! Handling visitor statistics the links above to find out more about the data in sites!