TOD ALVIN STANSFIELD
Pilots at Rosedale Dr, Elm Grove, WI

6470835, Oct 29, 2002

Dec 17, 2001

10/024086

Tod A. Stansfield - Elm Grove WI
Wilfred L. Ayala - Oak Creek WI
Stephen R. Wilkinson - Grafton WI
Brian W. Huibregtse - Menomonee Falls WI
Todd L. Anderson - Menomonee Falls WI
Hyunjae Park - Franklin WI

Aqua-Chem, Inc. - Milwaukee WI

F22D 100

122 7R, 122 311, 165166

An exhaust gas heat recuperation system for use with a boiler is disclosed. The heat recuperation system includes a plate-type heat exchanger for exhaust gas heat recovery for exchanging heat between an exhaust gas and a charge gas. The heat exchanger preferably includes a series of exhaust gas plates stacked alternately with, and parallel to, a series of charge gas plates. Each of the exhaust gas plates and charge gas plates have raised contained ridges to form a substantially sinusoidal path for directing the respective gas therealong. The shape of the path reduces exhaust gas particulate deposition. The charge gas flows in a countercurrent to the exhaust gas to facilitate maximum heat transfer. The heat exchange is particularly useful in laminar flow conditions. In one embodiment, the heat exchanger is connected to exhaust gas inlet and outlet conduits, change gas inlet and outlet conduits, and a condensate collection changer as part of an exhaust gas heat recuperation system, for use particularly in steam or hot water boiler applications.

6357396, Mar 19, 2002

Jun 15, 2000

09/594448

Tod A. Stansfield - Elm Grove WI
Wilfred L. Ayala - Oak Creek WI
Stephen R. Wilkinson - Grafton WI
Brian W. Huibregtse - Menomonee Falls WI
Todd L. Anderson - Menomonee Falls WI
Hyunjae Park - Franklin WI

Aqua-Chem, Inc. - Milwaukee WI

F22D 100

122 7R, 165166

An exhaust gas heat recuperation system for use with a boiler is disclosed. The heat recuperation system includes a plate-type heat exchanger for exhaust gas heat recovery for exchanging heat between an exhaust gas and a charge gas. The heat exchanger preferably includes a series of exhaust gas plates stacked alternately with, and parallel to, a series of charge gas plates. Each of the exhaust gas plates and charge gas plates have raised contained ridges to form a substantially sinusoidal path for directing the respective gas therealong. The shape of the path reduces exhaust gas particulate deposition. The charge gas flows in a countercurrent to the exhaust gas to facilitate maximum heat transfer. The heat exchange is particularly useful in laminar flow conditions. In one embodiment, the heat exchanger is connected to exhaust gas inlet and outlet conduits, change gas inlet and outlet conduits, and a condensate collection changer as part of an exhaust gas heat recuperation system, for use particularly in steam or hot water boiler applications.

5522696, Jun 4, 1996

Jan 4, 1995

8/368480

Tod A. Stansfield - Elm Grove WI

Aqua-Chem, Inc. - Milwaukee WI

F04D 2946, F23M 902

415151

The present invention provides an air box throttle assembly for improved characterization of a combustion system in which an arrangement of three air shutters is used to maintain a fairly constant air to fuel ratio as the combustion system is driven from low fire to high fire. A high fire shutter and a main air shutter each comprise two vanes and are rotatably mounted within an air intake box for a combustion system. A low fire shutter is provided with a single vane and is fixed above the main air shutter. The high fire shutter is the principal regulator of large volumes of air entering the combustion system when operating at high fire. At high fire, the main air shutter is fully open and low fire shutter has little effect on the flow of air through the air intake box. Low fire shutter is the principal regulator of small volumes of air entering the combustion system when operating at low fire. At low fire, the main air shutter is substantially perpendicular to air flowing into the air intake box such that air flow is forced through a passageway defined between the low fire shutter and the main air shutter.