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Phase-change cooling of subterranean power lines

  • US 8,872,022 B2
  • Filed: 07/18/2012
  • Issued: 10/28/2014
  • Est. Priority Date: 07/18/2012
  • Status: Expired due to Fees
First Claim
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1. An underground power transmission system, comprising:

  • a power line configured for subterranean installation along a first path;

    a cooling tube fluidly independent from the power line, the cooling tube configured for subterranean installation along the first path and adjacent to the power line, the cooling tube configured to house a fluid adapted to absorb thermal energy generated by a current flow through the power line; and

    a heat-exchanging condenser fluidly connected to the cooling tube, the heat-exchanging condenser configured to;

    receive the fluid in a heated, gaseous phase;

    dissipate thermal energy stored in the fluid in the gaseous phase; and

    return the fluid in a cooled, liquid phase.

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