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DE2001768588

Publication Date	2000
Personal Author	Obot, N. T.; Das, L.; Rabas, T. J.
Page Count	14
Abstract	An extensive experimental investigation was carried out to determine the pressure drop and heat transfer characteristics in laminar, transitional, and turbulent flow through one smooth tube and twenty-three enhanced tubes. The working fluids for the experiments were air, water, ethylene glycol, and ethylene glycol/water mixtures; Prandtl numbers (1%-) ranged from 0.7 to 125.3. The smooth-tube experiments were carried out with Pr values of 0.7, 6.8, 24.8, 39.1, and 125.3; Pr values of 0.7, 6.8, and 24.8 were tested with enhanced tubes. Reynolds number (Re) range (based on the maximum internal diameter of a tube) was 200 to 55,000, depending on Prandtl number and tube geometry. The results are presented and discussed in this paper.
Keywords	Tubes Pressure drop Heat transfer Air Water Glycol water mixtures Prandtl number
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Argonne National Lab., IL.; Department of Energy, Washington, DC.; Clarkson Univ., Potsdam, NY.
Supplemental Notes	Prepared in cooperation with Clarkson Univ., Potsdam, NY. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200122

Smooth- and Enhanced-Tube Heat Transfer and Pressure Drop: Part 1: Effect of Prandtl Number with Air, Water, and Glycol/Water Mixtures.

Smooth- and Enhanced-Tube Heat Transfer and Pressure Drop: Part 1: Effect of Prandtl Number with Air, Water, and Glycol/Water Mixtures.
DE2001768588

Publication Date	2000
Personal Author	Obot, N. T.; Das, L.; Rabas, T. J.
Page Count	14
Abstract	An extensive experimental investigation was carried out to determine the pressure drop and heat transfer characteristics in laminar, transitional, and turbulent flow through one smooth tube and twenty-three enhanced tubes. The working fluids for the experiments were air, water, ethylene glycol, and ethylene glycol/water mixtures; Prandtl numbers (1%-) ranged from 0.7 to 125.3. The smooth-tube experiments were carried out with Pr values of 0.7, 6.8, 24.8, 39.1, and 125.3; Pr values of 0.7, 6.8, and 24.8 were tested with enhanced tubes. Reynolds number (Re) range (based on the maximum internal diameter of a tube) was 200 to 55,000, depending on Prandtl number and tube geometry. The results are presented and discussed in this paper.
Keywords	Tubes Pressure drop Heat transfer Air Water Glycol water mixtures Prandtl number
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Argonne National Lab., IL.; Department of Energy, Washington, DC.; Clarkson Univ., Potsdam, NY.
Supplemental Notes	Prepared in cooperation with Clarkson Univ., Potsdam, NY. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200122