Experimental investigation of heat transfer in coiled annular ducts

Journal Article · Sun May 01 00:00:00 EDT 1988 · Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.3250488· OSTI ID:5484211

Garimella, S ^[1]; Richards, D E; Christensen, R N ^[2]

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1. Battelle Columbus Labs., OH (USA)
2. Ohio State Univ., Columbus (USA)

Forced convection heat transfer in coiled annular ducts was investigated experimentally. Average heat transfer coefficients were obtained for both laminar and transition flows. Two coiling diameters and two annulus radius ratios were used in the study. The data were correlated with Dean number and Reynolds number separately and compared with the available studies of coiled circular tubes and straight annular ducts. It was found that coiling augments the heat transfer coefficients above th values for a straight annulus especially in the laminar region. However, the augmentation is less than would be expected for a coiled circular tube. The augmentation decreases as the flow enters the transition region.

• OSTI ID: 5484211
• Journal Information: Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 110:2; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320106* -- Energy Conservation
Consumption
& Utilization-- Building Equipment-- (1987-)
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
ANNULAR SPACE
CONFIGURATION
CONVECTION
DUCTS
ENERGY SYSTEMS
ENERGY TRANSFER
FLUID FLOW
FORCED CONVECTION
HEAT TRANSFER
LAMINAR FLOW
MASS TRANSFER
REYNOLDS NUMBER
SPACE
SPACE HVAC SYSTEMS
TRANSITION FLOW