Ronald G Brenneman

US Patent:

7240724, Jul 10, 2007

Filed:

Aug 11, 2004

Appl. No.:

10/915824

Inventors:

Robert G. Graham - Presque Isle MI, US
Dana Goski - Columbus OH, US
Anthony S. DiSaia - Powell OH, US
Ronald G. Brenneman - Plain City OH, US
Herman L. Eslick - London OH, US

International Classification:

F28F 9/04

US Classification:

165158, 165 79, 165173, 165178, 264 31, 264629

Abstract:

A monolithic refractory ceramic tube sheet for use in all-ceramic air-to-air indirect heat exchangers, the heat exchanger used in all temperature and all pressure applications. A method for forming the monolithic tube sheet includes casting a refractory ceramic in a mold, where portions of the mold comprise the housing of the heat exchanger. Precisely formed negatives are used to form through channels and vacancies within the tube sheet, which are precisely positioned within the mold allowing uniform and flush formation of openings which receive the ceramic tubes therein. The same mold is used to provide both tube sheets of a tube sheet pair allowing accurate alignment of tubes within the exchanger vessel resulting in ease of assembly and equal loading of tubes when in use.

US Patent:

20050034847, Feb 17, 2005

Filed:

Aug 11, 2003

Appl. No.:

10/638803

Inventors:

Robert Graham - Presque Isle MI, US
Dana Goski - Columbus OH, US
Herman Eslick - London OH, US
Anthony DiSaia - Powell OH, US
Ronald Brenneman - Plain City OH, US

International Classification:

F28F009/02

US Classification:

165158000

Abstract:

A monolithic refractory ceramic tube sheet for use in all-ceramic air-to-air indirect heat exchangers, the heat exchanger used in medium to high temperature, and high pressure applications. A method for forming the monolithic tube sheet includes-casting a refractory ceramic in a mold, where portions of the mold comprise the housing of the heat exchanger. Precisely formed negatives are used to form through channels and vacancies within the tube sheet, which are precisely positioned within the mold allowing uniform and flush formation of openings that receive the ceramic tubes therein. The same mold is used to provide both tube sheets of a tube sheet pair allowing accurate alignment of tubes within the exchanger vessel resulting in ease of assembly and equal loading of tubes when in use.