Heat Transfer Fluids, System Cleaners

Paratherm LR^™	HEAT TRANSFER FLUID
*Single Fluid Heating and Cooling • Non Aromatic • Non Aqueous*

Paratherm LR™ vs. Ethylene Glycol and Propylene- Glycol Solutions -- Comparison of Heat Transfer Coefficients

Physical Properties

		Paratherm LR					Propylene Glycol**					Ethylene Glycol**
Temp*		Density*	Thermal Conduct.*	Viscosity*	Spec. Heat		Dens.	Therm. Cond.	Visc.	Spec. Heat		Dens	Therm. Cond.	Visc	Spec. Heat
Temp*		Density*	Thermal Conduct.*	Viscosity*	Spec. Heat		Dens.	Therm. Cond.	Visc.	Spec. Heat		Dens	Therm. Cond.	Visc	Spec. Heat

50		6.4	0.088	2.1	0.47		8.9	0.206	10.7	0.80		9.1	0.215	5.5	0.74

-4		6.6	0.090	5.0	0.44		9.0	0.193	73.0	0.77		9.2	0.199	22.1	0.71

-22		6.7	0.090	7.3	0.43		9.0	0.188	172.8	0.76		9.3	0.193	44.0	0.70

		Density, lb/gal Thermal Conductivity, BTU/(hr- ft²-°F/ft) Viscosity, cP Specific Heat, Btu/(lb-°F) *Temperature, ºF					**All data pertaining to Propylene and Ethylene glycol was obtained from Dow literature for the Dowfrost HD and Dowtherm 4000 @ 50% by Volume respectively

Fluid Film Coefficient - hi***


	Temp		Paratherm LR	Propylene Glycol	Ethylene Glycol

	50		157	199	277

	-4		106	77	137

	-22		89	51	97

Based on 3/4" Sch. 40 pipe @ 4'/sec. ***hi, BTU/(hr-ft²-°F)

Conclusions:

At 50ºF, glycol solutions have higher coefficients
At -4ºF, LR has a higher coefficient than Propylene Glycol solution
At -22ºF, LR has almost the same coefficient as Ethylene Glycol solution

Back to LR Main Page


Paratherm LR...

-	An Application Story
-	Engineering Bulletin
-	MSDS
-	Typical Properties
-	Thermal Prop. (English Units)
-	Thermal Prop. (SI Units)
-	LR Compared to Glycols

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