Publicado 8 números por año
ISSN Imprimir: 1065-5131
ISSN En Línea: 1563-5074
Indexed in
Oval Finned Tube Condenser and Design Pressure Limits
SINOPSIS
Finned tube heat exchangers presently used in the air-conditioning industry are made with round tubes (7.0−9.5 mm diameter) and plate fins of an enhanced fin geometry. The air-side pressure drop is composed of friction on the fins and pressure drag on the tubes. This work investigates the use of oval tubes to replace round tubes. This will result in higher heat transfer performance and lower air pressure drop. Of particular interest is application of the oval tube design to refrigerant condensers, which are designed for operating pressures of 31 bar, or more. This paper compares the performance of a proposed oval tube design with that of a typical 9.5 mm finned tube design. Mechanical design and fabrication are also described. A key question addressed in this work is to determine the maximum allowable internal tube pressure of the oval tube design. This question was addressed using 3-dimensional finite element stress analysis.
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