Patents by Inventor Frank A. Ewing

Frank A. Ewing 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).

  • Desalination of sea water near the critical pressure
    Patent number: 5217581
    Abstract: A distillation system where a saline fluid (10) is pumped into a pressure vessel (14), through a counterflow heat exchanger (16) and heated to boiling. A salt free distillate (20) is separated from the saline fluid (10). The concentrate valve (24) and the distillate valve (26) restrict egress flow. The concentrate valve (24), the distillate valve (26) and the heater (18) are controlled by a computer control system (32) to attain and maintain a desired value of the Ewing Number. The Ewing Number is a dimensionless measure of performance defined as the heat of vaporization of the distillate (20) at standard atmospheric conditions times the distillate (20) mass flow divided by the system power input.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: June 8, 1993
    Inventor: Frank A. Ewing