Heat transfer and pressure drop characteristics during the in-tube cooling process of carbon dioxide in the supercritical region

Seok Ho Yoon, Ju Hyok Kim, Yun Wook Hwang, Mm Soo Kim, Kyoungdoug Min, Yong Chan Kim

Research output: Contribution to journalArticle

148 Citations (Scopus)

Abstract

This paper presents the experimental data for the heat transfer and pressure drop characteristics obtained during the gas cooling process of carbon dioxide in a horizontal tube. The tubes in which carbon dioxide flows are made of copper with an inner diameter of 7.73 mm. Experiments were conducted for various mass fluxes and inlet pressures of carbon dioxide. Mass fluxes are controlled at 225, 337 and 450 kg m-2 s-1 by a variable speed gear pump, and the inlet pressures are adjusted from 7.5 to 8.8 MPa. The experimental results in this study are compared with the existing correlations for the supercritical heat transfer coefficient, which generally under-predict the measured data. Pressure drop data agree very well with those calculated by Blasius' equation. Using the measured data, a new empirical correlation to predict the near-critical heat transfer coefficient has been developed. Most of the experimental data can be predicted by the new correlation within a relative deviation of ±20%.

Original languageEnglish
Pages (from-to)857-864
Number of pages8
JournalInternational Journal of Refrigeration
Volume26
Issue number8
DOIs
Publication statusPublished - 2003 Dec 1

Fingerprint

heat transfer
Carbon Dioxide
Pressure drop
Carbon dioxide
cooling
Hot Temperature
carbon dioxide
Heat transfer
Cooling
Pressure
Heat transfer coefficients
heat transfer coefficient
Mass transfer
Gear pumps
pumps
Copper
Gases
copper
gases
Experiments

Keywords

  • Carbon dioxide
  • Cooling
  • Gas
  • Heat transfer
  • Phase
  • Pressure drop
  • Process

ASJC Scopus subject areas

  • Food Science
  • Mechanical Engineering

Cite this

Heat transfer and pressure drop characteristics during the in-tube cooling process of carbon dioxide in the supercritical region. / Yoon, Seok Ho; Kim, Ju Hyok; Hwang, Yun Wook; Kim, Mm Soo; Min, Kyoungdoug; Kim, Yong Chan.

In: International Journal of Refrigeration, Vol. 26, No. 8, 01.12.2003, p. 857-864.

Research output: Contribution to journalArticle

Yoon, Seok Ho ; Kim, Ju Hyok ; Hwang, Yun Wook ; Kim, Mm Soo ; Min, Kyoungdoug ; Kim, Yong Chan. / Heat transfer and pressure drop characteristics during the in-tube cooling process of carbon dioxide in the supercritical region. In: International Journal of Refrigeration. 2003 ; Vol. 26, No. 8. pp. 857-864.
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AB - This paper presents the experimental data for the heat transfer and pressure drop characteristics obtained during the gas cooling process of carbon dioxide in a horizontal tube. The tubes in which carbon dioxide flows are made of copper with an inner diameter of 7.73 mm. Experiments were conducted for various mass fluxes and inlet pressures of carbon dioxide. Mass fluxes are controlled at 225, 337 and 450 kg m-2 s-1 by a variable speed gear pump, and the inlet pressures are adjusted from 7.5 to 8.8 MPa. The experimental results in this study are compared with the existing correlations for the supercritical heat transfer coefficient, which generally under-predict the measured data. Pressure drop data agree very well with those calculated by Blasius' equation. Using the measured data, a new empirical correlation to predict the near-critical heat transfer coefficient has been developed. Most of the experimental data can be predicted by the new correlation within a relative deviation of ±20%.

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