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Heat transfer characteristics and performance of a spirally coiled heat exchanger under sensible cooling conditions.

Author(s) : WONGWISES S., NAPHON P.

Type of article: Article

Summary

In the study, new experimental data on the heat transfer characteristics and the performance of a spirally coiled heat exchanger under sensible cooling conditions is presented. The spiral-coil heat exchangers consists of a steel shell and a spirally coiled tube unit. The spiral-coil unit consists of 6 layers of concentric spirally coiled tubes. Each tube is fabricated by bending a 9.27 mm diameter straight copper tube into a spiral-coil of five turns. The innermost and outermost diameters of each spiral-coil are 67.7 and 227.6 mm, respectively. Air and water are used as working fluids in shell side and tube side, respectively. A mathematical model based on the conservation of energy is developed to determine the heat transfer characteristics. There is a reasonable agreement between the results obtained from the experiment and those obtained from the model and a good agreement for the high air mass flow rate region. The results obtained from the parametric study are also discussed.

Details

  • Original title: Heat transfer characteristics and performance of a spirally coiled heat exchanger under sensible cooling conditions.
  • Record ID : 2006-2257
  • Languages: English
  • Source: JSME int. J., B - vol. 48 - n. 4
  • Publication date: 2005/11

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