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IIR document

Pressure drop in large flattened-tube steam condensers.

Number: pap. n. 906

Author(s) : DAVIES W. A., HRNJAK P.

Summary

Pressure drop during steam condensation is measured experimentally in a large, flattened-tube air-cooled condenser. The steel tube is 5.7 m long, with an elongated-slot cross section with inner dimensions of 216 x 16 mm. Cooling air is provided by 48 axial fans of 120 mm diameter, providing air velocity from 2 – 2.7 m s-1. Tube inclination angle is varied from 0 – 49o downwards, and condensation pressure is varied from 70 – 105 kPa. Pressure drop is measured in two 2.85 m sections along the tube. Pressure drop for the full tube is also measured by difference between inlet and outlet gauge pressure. Pressure drop is found to be very small (<100 Pa) for all test conditions due to the low mass flux (< 5 kg m-2 s-1). Frictional pressure drop is found to increase as mass flux increases, and total pressure drop is found to decrease as inclination increases.

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Pages: 8

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Details

  • Original title: Pressure drop in large flattened-tube steam condensers.
  • Record ID : 30026375
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.0906

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