Per E Duus

US Patent:

20030182941, Oct 2, 2003

Filed:

Feb 14, 2003

Appl. No.:

10/344739

Inventors:

John Andrepont - Naperville IL, US
Per Duus - Chicago IL, US
Robert Golueke - Naperville IL, US

International Classification:

F02C001/00

US Classification:

060/728000

Abstract:

Liquid fuel for a power plant is vaporized against a heat-exchange fluid, cooling the fluid. A re-circulation circuit enables cooled fluid to be re-directed back for further cooling, when desired. The cooled fluid is used to cool the inlet air for a combustion turbine. Some of the cooled fluid is periodically directing to the bottom of a stratified tank, from which it can be drawn during times when the need for or value of cooling the inlet air is higher. The fluid is warmed as it cools the inlet air, and may be returned for use in vaporizing additional fuel, or returned to the top of the stratified tank.

US Patent:

50019066, Mar 26, 1991

Filed:

May 4, 1989

Appl. No.:

7/347187

Inventors:

Gerald E. Engdahl - Wheaton IL
Per E. Duus - West Chicago IL

Assignee:

Chicago Bridge & Iron Technical Services Company - Oak Brook IL

International Classification:

F28D 1500
F28D 708

US Classification:

62434

Abstract:

A high pressure heat exchanger has a body with spaced apart parallel plates with side walls joined to the peripheral edge of each plate; a tubular high pressure liquid inlet header external of the body; a tubular high pressure liquid outlet header external of the body; a plurality of separate tubular runs in communication with the inlet and outlet headers; each tubular run including a tubular portion between substantially all adjacent plates of the body; the tubular portions of the same run being interconnected at one end by a tubular liquid return with a tubular portion on the opposite side of a first adjacent body plate and interconnected at the other end by a tubular liquid return with a tubular portion on the opposite side of a second adjacent body plate; the body internal plates having a liquid communication opening which permits a second liquid to flow from the space on one side of a baffle plate to the space on the other side of the baffle plate in a serpentine flow path through the body while in heat exchange contact with a first liquid flowing countercurrent in the tubular runs; the body having an inlet for feeding a second liquid into the body so that it flows countercurrent to the first liquid in the tubes; and the body having an outlet for withdrawing the second liquid from the body. A method of making the heat exchanger is also disclosed as is refrigeration apparatus using the heat exchanger.