TY - GEN
T1 - Effect of maximum temperature and heating-cooling repeated cycles on thermal contact resistance of a composite tube
AU - Mariscal, I. Carvajal
AU - Silva, F. Sánchez
AU - Polupan, G.
AU - Rojo, J. A.Basualdo
PY - 2009
Y1 - 2009
N2 - Experimental research results of the operational parameter effect on Thermal Contact Resistance (TCR) in a copper-aluminum L-type finned tube are presented. The investigated operational parameters were the maximum operational temperature and the number of repeated heating-cooling cycles. The TCR was experimentally determined by measuring the total heat supply, core tube wall and inner fin surface temperatures for steady-state and natural-convection conditions. In addition, the specimen was tested through up to 200 heating-cooling cycles. The experimental results showed a TCR increase of 81% at the same time as the average temperature difference between the hot inner flow and cooling air increased from 30°C to 130°C; over the maximum operational temperature (120°C), the TCR increased faster than before; and, after the heating-cooling cycle testing the TCR presented an increase of 31% in respect with the initial value. Such findings may be useful as a reference for preliminary thermal design and as recommendations for optimal operation of heat exchangers based on copper-aluminum L-type finned tubes.
AB - Experimental research results of the operational parameter effect on Thermal Contact Resistance (TCR) in a copper-aluminum L-type finned tube are presented. The investigated operational parameters were the maximum operational temperature and the number of repeated heating-cooling cycles. The TCR was experimentally determined by measuring the total heat supply, core tube wall and inner fin surface temperatures for steady-state and natural-convection conditions. In addition, the specimen was tested through up to 200 heating-cooling cycles. The experimental results showed a TCR increase of 81% at the same time as the average temperature difference between the hot inner flow and cooling air increased from 30°C to 130°C; over the maximum operational temperature (120°C), the TCR increased faster than before; and, after the heating-cooling cycle testing the TCR presented an increase of 31% in respect with the initial value. Such findings may be useful as a reference for preliminary thermal design and as recommendations for optimal operation of heat exchangers based on copper-aluminum L-type finned tubes.
KW - Composite L-type finned tube
KW - Operational parameters
KW - Thermal Contact Resistance
UR - http://www.scopus.com/inward/record.url?scp=75949126553&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMM.15.41
DO - 10.4028/www.scientific.net/AMM.15.41
M3 - Contribución a la conferencia
SN - 0878493093
SN - 9780878493098
T3 - Applied Mechanics and Materials
SP - 41
EP - 46
BT - Electromechanical and Systems Engineering
T2 - 5th International Congress of Electromechanical and Systems Engineering
Y2 - 10 November 2008 through 14 November 2008
ER -