Method of providing heat
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United States of America Patent
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-
Jun 5, 2001
Grant Date -
N/A
app pub date -
Oct 21, 1999
filing date -
Feb 1, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A heat exchanger formed of two plates or stages with one being on top of the other and with a plurality of such heat exchangers stacked on each other. The first stage has an inlet opening, an inlet passage and passages opened to the end of the stage. The second stage has an inlet opening leading to passages which lead to an outlet passage and an outlet opening. The second stage also has an inlet opening leading to passages which have an outlet at the end. A combustible gas enters the passage region of the first stage where the mixture is preheated and then passes to a passage region of the first stage. Portions of the gas passages in the passage region contain a combustion promoting catalyst so that the gas burns in the passage region. The products of combustion leave through the outlet end and are conveyed to an inlet of the passage region of the second stage.
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