Patents by Inventor Rodney Grahame COLWELL

Rodney Grahame COLWELL has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Geothermal loop in-ground heat exchanger for energy extraction
    Patent number: 9541309
    Abstract: A geothermal loop in-ground heat exchanger for energy extraction including an outer tubular casing and an inner tubular portion spaced from the outer tubular casing to define an injection space wherein a working fluid is injected into the injection space at a first temperature, T1 while the heat exchanger is located in a geothermal heat reservoir and the working fluid exits through the inner tubular portion at a second temperature, T2 which is greater than T1.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: January 10, 2017
    Assignee: Controlled Thermal Technologies Pty Ltd.
    Inventor: Rodney Grahame Colwell
  • GEOTHERMAL LOOP IN-GROUND HEAT EXCHANGER FOR ENERGY EXTRACTION
    Publication number: 20150122453
    Abstract: A geothermal loop in-ground heat exchanger for energy extraction including an outer tubular casing and an inner tubular portion spaced from the outer tubular casing to define an injection space wherein a working fluid is injected into the injection space at a first temperature, T1 while the heat exchanger is located in a geothermal heat reservoir and the working fluid exits through the inner tubular portion at a second temperature, T2 which is greater than T1.
    Type: Application
    Filed: November 6, 2014
    Publication date: May 7, 2015
    Applicant: CONTROLLED THERMAL TECHNOLOGIES PTY LTD
    Inventor: Rodney Grahame COLWELL