• Title/Summary/Keyword: E-J power

Search Result 823, Processing Time 0.029 seconds

Research and Development of Superconducting Magnetic Energy Storage system(SMES)

  • Isojima, Shigeki
    • Electrical & Electronic Materials
    • /
    • v.11 no.10
    • /
    • pp.40-45
    • /
    • 1998

  • This paper describes a collaborative work between SEI and KEPCO on the Superconducting Magnetic Energy Storage system (SMES). We have studied two types of magnets. One is the 400kJ class LTS-SMES for testing the power stabilization operated at liquid helium temperature (4.2K) and the other is the 100J class HTS-SMES for confirming the possibility of applying HTS wire to SMES at liquid nitrogen temperature (77k). In this paper, the design of the magnet and the test results are described. Each magnet performed completely at rated operation.

  • PDF

DESIGN ANALYSIS OF OFFSET STRIP FIN HEAT EXCHANGER

  • Bhowmik, Himangshu;Lee, Kwan-Soo
    • Proceedings of the KSME Conference
    • /
    • 2008.11b
    • /
    • pp.2131-2136
    • /
    • 2008

  • The characteristics of heat transfer and pressure drop in an offset strip fin heat exchanger was studied with a steady-state three dimensional numerical model. Flow Reynolds number $Re_{dh}$ ranged from 10 to 3500 and Prandtl number Pr ranged from 0.7 to 50. The dimensionless performance factors, i.e. 'the pumping power factor F' and 'the heat transfer performance factor J' were analyzed and obtained a relationship between them. Finally, the prediction of F and J factors was generalized for different Prandtl numbers.

  • PDF