Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
권호 표지
DOI QR코드

DOI QR Code

Study on Pressure drop characteristics in HTS cable core with two flow passages

  • Published : 2008.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

The main objective of this study is to identify the pressure drop characteristics of coolant flow passages of 154kV/1GVA High Temperature Superconducting (HTS) power cable, experimentally. The passages were consisted of two parts, the one is the circular path with spiral ribs in the core to cool the cable conductor layer and the other is annular path with spirally corrugated outer wall to cool the shield layer. Thus the experiments to acquire the pressure drop data were performed with two types of circular spiral tubes and eight types of the concentric annuli in various range of Reynolds number. The pressure drops in the core tubes and the annuli were much higher than those in the tubes with smooth surface. Therefore, modified correlations to present the experimental results in each flow passage were suggested.

Keywords

References

  1. Moody, LF., An approximate formula for pipe friction factors, Mech Engng., 69, pp. 1005-6, 1947
  2. Bergles, A. E., Heat transfer characteristics of Turbotec Tubing, Heat Transfer Lab. Report HTL-24 ISU-ERI-Ames-81018, Iowa State Univ., 1980
  3. Ravigururajan TS, Bergles AE., General correlations for pressure drop and heat transfer for single-phase turbulent flow in internally ribbed tubes, Augmentation of Heat Transfer in Energy Systems, ASME-HTD, 52, pp. 9-20, 1985
  4. Jensen MK, Vlakancic A., Experimental investigation of turbulent heat transfer and fluid flow in internally finned tubes. Int. J. Heat Mass Transfer, 42, pp. 1343-51, 1999 https://doi.org/10.1016/S0017-9310(98)00243-9
  5. Garimella and Christensen, Heat Transfer and Pressure Drop Characteristics of Spirally Fluted Annuli: Part I-Hydrodynamics, Transactions of the ASME, J. Heat Transfer, 117, pp. 54-60, 1995 https://doi.org/10.1115/1.2822323
  6. Moffat, R. J., Describing the Uncertainties in Experimental Results, Exp. Fluid Thermal Sci., 1, pp. 3-17, 1988 https://doi.org/10.1016/0894-1777(88)90043-X
  7. Filonenko, G. K., Hydraulic Resistance in Pipes, Teploergetical, 4, pp. 40-44, 1954
  8. Kakac, S., Shah, R. K., and Aung, W., Handbook of Single-Phase Convective Heat Transfer, Wiley, New York, 3-92 and 4-132, 1987