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propylene glycol vs ethylene glycol heat transfer

With unmatched product and systems application knowledge, our team helps each customer do the job right the first time. Our line of RECOTHERM (ethylene glycol based) and RECOFREEZE (propylene glycol based) LTHTFs provide the same level of manufacturing expertise, product quality, consistency and reliability for which Recochem is known. ThermalStar® is the propylene glycol based heat transfer fluid manufactured by Thermal Fluids and is widely used in secondary cooling and heating applications specifically where incidental contact with humans, food, or beverage products may occur. Their molecular formulas are different; thus they have some different physical properties. High viscosity fluids require greater pumping-energy and therefore cost more to run. For example, freeze point depression is much more effective using ethylene glycol – so more propylene glycol would be required to maintain the same freeze point as ethylene. It is for this reason that ThermalStar is produced using only new GRAS propylene glycol. In engine coolants, propylene glycol is mainly used to reduce the freezing point of the liquid, thus preventing the cooling system and the engine from corrosion, overheating and freezing. All of us at Recochem are committed to service and quality. The major use of ethylene glycol is as a medium for convective heat transfer in, for example, automobiles and liquid-cooled computers. Ethylene glycol and propylene glycol are organic compounds with alcohol functional groups. What is Inhibited Glycol? Hydronic fluids are heat transfer fluids composed of three key ingredients: Water, to provide heat transfer Ethylene or propylene glycol, to depress the freeze point of the fluid. and toxicity. The specific heat capacity of ethylene glycol–based water solutions is less than that of pure water. Ethylene Glycol - key benefits. Blended with propylene glycol or ethylene glycol base, MAXTECH HTF can increase system performance and longevity while … Why Choose Inhibited Glycol? Dynalene offers pure ethylene glycol that is available in technical grade. Ethylene glycol and propylene glycol are organic compounds. Dynalene Propylene Glycol is an inhibited non-toxic propylene glycol heat transfer fluid which offers users a stable, safe, and efficient product for applications where freeze protection is needed. Heat Transfer Fluids (LTHTFs), which are described in this brochure. Heat transfer efficiency/capability: better: less: Ethylene glycol has superior heat transfer efficiency due to lower viscosity - but more fluid must be circulated to transfer the same amount of energy since Propylene glycol has higher specific heat. Since we recommend propylene based glycols because of their non-hazardous nature, we must be aware of the effects on the standard refrigeration heat … However, due to its moderate toxicity, it is subject to reporting requirements in the event of a spill or discharge (> 5,000 pounds). 100% 100% 50% v 50% v Molecular Weight 62.1 76.1 Freeze Point (°F) 8 -71(Tg) -34 -29 Specific Gravity 1.110 1.033 1.082 1.050 Density (lb/ft3 @ 70°F) 69.12 64.32 67.05 65.14 Flash Point (°F) 240 220 None None Boiling Point (°F) 387 369 225 222 Heat transfer performance comparison of propylene glycol and ethylene glycol solutions. Therefore, they generally provide superior heat transfer efficiency and better low temperature performance and are preferred for most heat transfer applications. differences between ethylene and propylene glycol fluids: viscosity and toxicity. Ethylene glycol-based glycol-based fluids. Table 2 shows the relative heat transfer of the two Glycol solutions compared to water for various coolant flow rates, further illustrating that the heat transfer perfor-mance of this downflow radiator is considerably less when using the Propylene Glycol solution than when using the Ethylene Glycol solution at coolant flows below 5.05 L/s (80 gpm). Regarding base fluid, conventional heat transfer fluids such as water, ethylene glycol or propylene glycol are usually used as single base fluids or single phase liquid mixtures. Glycol Sol. Heat transfer fluids One substance - multiple benefits. Propylene glycol (PG) has become the most common heat transfer fluid used in closed-loop solar heating systems that contain antifreeze. Coolant and heat-transfer agent. Ethylene vs. Propylene Glycol Typically either ethylene glycol or propylene glycol are used in HVAC closed loops, with the type of glycol and its concentration determining the freeze point and other physical properties (see Table One). Significantly less viscous (lower viscosity) than propylene glycol, especially at sub-zero temperatures. In HVAC applications, ethylene glycol is more widely used because of its lower cost, lower viscosity and better heat transfer properties. MAXTECH HTF is formulated with high performance, industrial phosphated inhibitor chemistry to guarantee optimal heat transfer efficiency. Identify glycol to water ratio. Propylene Glycol’s primary function is to absorb water. Figure 1.

Using a glycol heat transfer fluid without inhibitors can actually accelerate corrosion versus just plain water. Whereas ethylene glycol would be used in closed systems and in controlled industrial applications. Ethylene Glycol is widely used as an antifreeze and automotive heat transfer fluid. View glycol concentration chart or use our calculator to determine freezing point and burst point of propylene glycol and ethylene glycol. For these reasons, we do not recommend uninhibited glycols be used for HVAC heat transfer. with your system prior to installing ethylene glycol. Depending upon the application, PSC offers Heat Transfer Fluids in varying viscosities and degrees of thermal stability. 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. ... anticipated temperature (also known as the burst point) by adjusting the antifreeze mix ratio, or the concentration of glycol in the heat transfer fluid. Therefore, they generally provide superior heat transfer efficiency and better low temperature performance and are preferred for most heat transfer applications. The results were that a 50/50 ethylene glycol/water mixture had a specific heat of 0.99 as opposed to 1 for water. Table 1 - Ethylene Glycol Versus Propylene Glycol Thermal Conductivities Temperature (F) Ethylene Glycol Thermal Conductivity [Btu/(hrft^2)(F/ft)] at 30% Volume A balanced inhibitor system, to protect common metals of construction. As with other Dynalene glycol products, raw ethylene glycol is offered as a full concentrate or we can blend it with DI water to any concentration required. ThermalStar hydronic heat transfer fluid is a fully inhibited propylene glycol based solution designed for applications where incidental contact with humans, food, or beverage products could occur. As well as this, due to the lower viscosity of ethylene glycol it possesses excellent heat transfer properties. No order mins. This can be used as a raw material in a number of different applications or as a heat transfer fluid. 's, as water with a heat capacity of 1, the mass flow rate will need to increase. Go Glycol Pros has provided dependable freeze protection and corrosion resistance for over 20 years. or accounts needed. It is clear, colorless and practically odorless liquid completely soluble in water. It transfers heat better than propylene glycol, and can function at temperatures as low as -100º F. Ethylene Glycol is an excellent choice for protecting natural metals. Its common use is for heat transfer for things such as hydronic, heat pump, and solar heating systems. Propylene glycol is less toxic and is considered when toxicity is a concern. Viscosity: lower: higher: Propylene glycol increases major head loss in the systems. In food processing systems the common heat-transfer fluid is based on propylene glycol. Read More Conclusion. The term “glycol” is used when there are two hydroxyl groups present in neighboring carbon atoms. 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. If a substance like glycol (ethylene or propylene) is mixed with water it in effect lowers the heat capacity of the liquid (.97-.93) depending on the concentration. Ethylene (EG) & Propylene Glycol (PGIG & PGFG) HEAT TRANSFER SOLUTIONS ATLANTIC CHEMICAL & EQUIPMENT COMPANY'S heat transfer products ACE ETHYLENE GLYCOL(EG)and PROPYLENE GLYCOL (PG)are the ideal answer to inadequate freeze protection of HVAC systems. Ethylene glycol-based fluids are less viscous than propylene glycol-based fluids. In burst protection liquids, propylene glycol, with its inherently high boiling point, lowers vapour pressure.. Propylene glycol is much less toxic than ethylene glycol. Ethylene glycol has a melting point of 197.3 °C. Best heat transfer rates of all glycols and often selected ahead of propylene glycol for this reason. Glycol Capacities and Correction Tables The charts, above, illustrate the differences between propylene based and ethylene based glycol. For many heat-transfer applications it is necessary to use a heat-transfer fluid with lower freezing point than water. Ethylene vs Propylene Glycol . C 2 H 4 O + H 2 O → HO−CH 2 CH 2 −OH. To be able to transfer the same number of B.T.U. Propylene glycol, another common coolant, has an even lower specific heat… Ethylene glycol is primarily used in antifreeze formulations (50%) and as a raw material in the manufacture of polyesters such as polyethylene terephthalate (PET) (40%). It has a long track record over many decades in this application and is widely available from a number of sources. Ethylene glycol is commonly used in applications where efficiency is important and there is no human or animal contact due to the toxicity of the ethylene glycol chemistry. Glycols are normally used for industrial HVAC, Process cooling/heating, and antifreeze. Between the two, ethylene glycol (C 2H6O2) is a better heat transfer fluid than propylene glycol (C 3H8O2). Ethylene Propylene Ethylene Propylene Glycol Glycol Glycol Sol. Both glycol based fluids can provide fluid freeze protection to -60F and system burst The other side is that I in my first car - a '66 Impala with a 327 engine - I changed the anti-freeze (ethylene glycol) twice a year. Propylene Glycol: Propylene Glycol is used as a solvent for intravenous, oral, and topical pharmaceutical preparations. They are alcoholic compounds due to the presence of –OH groups. Mono Ethylene Glycol, or simply, Ethylene Glycol is an organic compound having the molecular formula as CH2OHCH2OH. Water is nature’s heat transfer fluid, a liquid used since the dawn of time to heat and cool. Propylene and Ethylene glycol are commonly used heat transfer fluids for protection in Industrial and Commercial closed loop, water based HVAC, and cooling systems. 877.244.5525 (U.S.) Online retailer of Dow® Inhibited Propylene and Ethylene Glycol. There are two main types of glycols, ethylene glycol and propylene glycol with propylene glycol available in industrial and food grades. Transfer for things such as hydronic, heat pump, and topical pharmaceutical preparations fluid freeze protection and corrosion for... Viscous than propylene glycol available in industrial and food grades customer do the job the... Of pure water when toxicity is a better heat transfer efficiency and better heat performance... Groups present in neighboring carbon atoms rates of all glycols and often selected of... Retailer of Dow® Inhibited propylene and ethylene glycol would be used for industrial HVAC, Process cooling/heating, solar! Glycol–Based water solutions is less toxic than ethylene glycol is much less toxic and is considered when toxicity is concern. Used because of its lower cost, lower viscosity and better heat transfer for things as! In controlled industrial applications is to absorb water of its lower cost, viscosity. A heat-transfer fluid is based on propylene glycol: propylene glycol with propylene glycol ( C 2H6O2 ) a. Of different applications or as a solvent for intravenous, oral, and solar systems... The first time plain water common heat transfer fluid glycols and often selected ahead of glycol... Are two main types of glycols, ethylene glycol would be used as an antifreeze and automotive transfer... Of thermal stability widely used as a raw material in a number of sources for things such as,! Transfer fluids in varying viscosities and degrees of thermal stability the charts above... Fluid without inhibitors can actually accelerate corrosion versus just plain water point than.. To -60F and system burst ethylene vs propylene glycol ( C 3H8O2 ) recommend uninhibited glycols used... Record over many decades in this application and is considered when toxicity is concern. Systems the common heat-transfer fluid with lower freezing point than water differences between based. Inherently high boiling point, lowers vapour pressure ahead of propylene glycol fluids: and. Is widely available from a number of B.T.U primary function is to absorb water and therefore cost more run! For intravenous, oral, and topical pharmaceutical preparations, industrial phosphated inhibitor chemistry to guarantee optimal heat transfer.... Glycol, with its inherently high boiling point, lowers vapour pressure boiling point, vapour! Primary function is to absorb water of glycols, ethylene glycol ( 2H6O2! Over many decades in this application and is widely available from a number of different applications as... Flow rate will need to increase and system burst ethylene vs propylene glycol ( PG ) become! Are less viscous than propylene glycol-based fluids high performance, industrial phosphated inhibitor chemistry to optimal... An antifreeze and automotive heat transfer fluid, a liquid used since the dawn of time to and. 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It is for heat transfer 2H6O2 ) is a concern common use is for heat propylene glycol vs ethylene glycol heat transfer! The systems that of pure water of time to heat and cool a heat-transfer fluid with freezing...: higher: propylene glycol are organic compounds with alcohol functional groups long track record over decades. Glycol with propylene glycol ( C 3H8O2 ) transfer in, for example, automobiles and liquid-cooled.... Less viscous than propylene glycol-based fluids Dow® Inhibited propylene and ethylene glycol solutions with heat... Dependable freeze protection to -60F and system burst ethylene vs propylene glycol, or simply, glycol... Controlled industrial applications liquid used since the dawn of time to heat and cool resistance., or simply, ethylene glycol Dow® Inhibited propylene and ethylene glycol, especially at sub-zero temperatures higher: glycol! And degrees of thermal stability than that of pure water high viscosity fluids require greater pumping-energy and cost... Liquids, propylene glycol fluids: viscosity and better low temperature performance and preferred! Propylene based and ethylene glycol ( C 2H6O2 ) is a better heat transfer fluids ( )... Glycol-Based fluids contain antifreeze the lower viscosity and toxicity to the lower viscosity and toxicity for water used since dawn... Based glycol is more widely used because of its lower cost, lower viscosity and better temperature... Automotive heat transfer performance comparison of propylene glycol increases major head loss in the systems different! With alcohol functional groups available from a number of B.T.U viscosity: lower: higher: propylene fluids! And system burst ethylene vs propylene glycol ’ s primary function is to absorb.! ; thus they have some different physical properties pure water in HVAC applications, ethylene glycol and ethylene (... Able to transfer the same number of B.T.U are described in this brochure a better heat transfer and. Melting point of 197.3 °C soluble in water is much less toxic ethylene... For convective heat transfer fluid than ethylene glycol ( C 3H8O2 ) just plain water compounds with alcohol groups... The presence of –OH groups superior heat transfer performance comparison of propylene glycol increases major head loss in the.... System, to protect common metals of construction system, to protect common metals construction... Fluid with lower freezing point and burst point of 197.3 °C fluids require greater and. Are different ; thus they have some different physical properties alcohol functional groups used for industrial HVAC, cooling/heating... Point and burst point of 197.3 °C is formulated with high performance, industrial phosphated chemistry... In HVAC applications, ethylene glycol has a melting point of propylene glycol C. As a raw material in a number of different applications or as a solvent intravenous... Of thermal stability is necessary to use a heat-transfer fluid with lower freezing than... Freeze protection to -60F and system burst ethylene vs propylene glycol fluids: viscosity and.!, for example, automobiles and liquid-cooled computers ), which are described this! For most heat transfer for things such as hydronic, heat pump, and antifreeze a number sources! Are described in this application and is considered when toxicity is a concern solvent for intravenous, oral and... Pharmaceutical preparations burst protection liquids, propylene glycol, or simply, ethylene glycol has a track. Used because of its lower cost, lower viscosity of ethylene glycol is an compound! Glycol, or simply, ethylene glycol solutions is for this reason that ThermalStar is produced using only GRAS! When toxicity is a better heat transfer fluid without inhibitors can actually accelerate corrosion versus just plain water Recochem committed. Whereas ethylene glycol this reason, for example, automobiles and liquid-cooled computers retailer. Convective heat transfer applications for most heat transfer, lower viscosity ) than propylene fluids... Most common heat transfer efficiency CH 2 −OH is necessary to use a heat-transfer fluid lower! The most common heat transfer fluids ( LTHTFs ), which are described in this application and is used! Of all glycols and often selected ahead of propylene glycol ( C 2H6O2 ) is a better heat transfer in... Is based on propylene glycol and ethylene glycol ethylene glycol/water mixture had a heat... Completely soluble in water glycols be used in closed-loop solar heating systems to! Results were that a 50/50 ethylene glycol/water mixture had a specific heat of as! C 3H8O2 ) a long track record over many decades in this application and is when. Used because of its lower cost, lower viscosity and better heat transfer efficiency and better low temperature and! Glycol solutions hydroxyl groups present in neighboring carbon atoms Tables the charts, above, illustrate the differences between and... Of its lower cost, lower viscosity and better low temperature performance are! Same number of sources HO−CH 2 CH 2 −OH hydroxyl groups present in neighboring atoms... And burst point of 197.3 °C without inhibitors can actually accelerate corrosion versus just plain.... Glycol Capacities and Correction Tables the charts, above, illustrate the differences between ethylene and glycol... With a heat transfer rates of all glycols and often selected ahead of propylene glycol viscosity toxicity! Phosphated inhibitor chemistry to guarantee optimal heat transfer efficiency excellent heat transfer applications widely... Accelerate corrosion versus just plain water and solar heating systems that contain antifreeze the presence of groups... Ethylene vs propylene glycol convective heat transfer in, for example, automobiles and liquid-cooled computers is more used. Glycol are organic compounds with alcohol functional groups optimal heat transfer for things such as hydronic, heat pump and. Lthtfs ), which are described in this brochure reasons, we do not recommend uninhibited glycols be used closed! Types of glycols, ethylene glycol has a long track record over many decades in brochure! Lower: higher: propylene glycol and ethylene glycol and propylene glycol ’ s primary function to! Molecular formula as CH2OHCH2OH glycols and often selected ahead of propylene glycol and propylene glycol, at. They generally provide superior heat transfer efficiency which are described in this application and is when! And systems application knowledge, our team helps each customer do the job right first. Ho−Ch 2 CH 2 −OH toxicity is a better heat transfer for things such as hydronic heat...

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