Claims
- 1. A catalytic heater for heating liquid for a diving suit comprising:
a source of hydrogen; a source of oxygen; a gas circuit having a pair of valves, each valve being coupled to a separate one of said sources to mix said hydrogen and oxygen together; a catalyst coupled to said gas circuit to react with said mixed hydrogen and oxygen to produce heat; and a multi-tube heat exchanger coupled to exchange liquid with a diving suit and to pass said liquid therethrough, said multi-tube heat exchanger having said catalyst disposed therein to transfer said heat to said liquid in said multi-tube heat exchanger to create heated liquid for said diving suit.
- 2. A catalytic heater according to claim 1 further comprising:
a housing jacket closed at opposite ends by cap members to define a chamber containing said catalyst and multi-tube heat exchanger therein, said cap members having fittings to pass said liquid through said multi-tube heat exchanger, said gas circuit flowing said mixed hydrogen and oxygen to said catalyst in said multi-tube heat exchanger.
- 3. A catalytic heater according to claim 2 wherein said multi-tube heat exchanger includes a plurality of tubes, a shell-shaped casing, and a pair of disc-shaped end members, said tubes and said casing being secured at opposite ends to said end members and extending there between, and said casing being disposed radially outwardly from said tubes to define sealed spaces around said tubes and inside said shell and end members.
- 4. A catalytic heater according to claim 3 wherein said housing and said shell define an annular passageway therebetween to pass some of said liquid there through during heating thereof, and said tubes pass some of said liquid there through during heating thereof.
- 5. A catalytic heater according to claim 4 wherein said catalyst is disposed in said spaces around said tubes inside said casing and said end members
- 6. A catalytic heater according to claim 5 further comprising:
a hose loop connected to said multi-tube heat exchanger and said diving suit; and a pumping unit coupled to said hose loops to circulate said liquid therebetween.
- 7. A catalytic heater according to claim 6 wherein said source of oxygen includes other gases.
- 8. A catalytic heater according to claim 7 wherein said gas circuit has opposite ends coupled to extend trough said housing and said casing at opposite ends to vent said mixed hydrogen and oxygen to said catalyst in a semi-closed gas loop circuit.
- 9. A catalytic heater according to claim 7 wherein said gas circuit has one end coupled to extend through one end of said housing and said casing at one end to vent said mixed hydrogen and oxygen to said catalyst in an open circuit.
- 10. A catalytic heater according to claim 8 wherein said hydrogen is about one percent of said oxygen and said other gases, and said liquid is water.
- 11. A catalytic heater according to claim 10 wherein said catalyst is comprised of 0.8% palladium, deposited on extruded carbon pellets.
- 12. A catalytic heater according to claim 11 wherein said valves coupled to said source of oxygen and other gases and said source of hydrogen are actuated to create elevated pressures in said gas circuit and said catalyst to increase the production of heat in said catalyst.
- 13. A catalytic heater according to claim 11 wherein said valves are coupled to a source of air and said source of hydrogen, said valves are actuated to increase the flow rate of air and hydrogen to increase production of heat in said catalyst and are actuated to decrease the flow rate of air and hydrogen to decrease production of heat in said catalyst.
- 14. A catalytic heater according to claim 11 wherein said valves are coupled to a source of air and said increase of hydrogen, said valves are actuated to increase the percentage of hydrogen with respect to said air to increase the production of heat in said catalyst and are actuated to decrease the percentage of hydrogen with respect to said air to decrease the production of heat in said catalyst.
- 15. A heater for a diving suit comprising:
a gas circuit to mix hydrogen and oxygen together; a catalyst bed coupled to said gas circuit to react with said mixed hydrogen and oxygen to produce heat; and a multi-tube heat exchanger coupled to pass liquid, said multi-tube heat exchanger having said catalyst bed disposed therein to transfer said heat to said liquid to create heated liquid for said diving suit.
- 16. A method of heating liquid for a diving suit comprising the steps of:
coupling sources of hydrogen and oxygen to a gas circuit; mixing said hydrogen and oxygen together in said gas circuit; feeding said mixed hydrogen and oxygen to a catalyst inside a heat exchanger; reacting said mixed hydrogen and oxygen with said catalyst; producing heat by said reacting; circulating liquid through said heat exchanger; heating said liquid with said heat; and coupling said heated liquid to a diving suit.
CROSS REFERENCE TO RELATED APPLICATION
[0001] This is a continuation of copending U.S. patent application entitled “Method and System, for Heating and Humidifying a Breathable Gas” by M. L. Nuckols et al., U.S. Patent and Trademark Office Ser. No. 09/448,405 (NC 79938), filed Nov. 22, 1999 and incorporates all references and information thereof by reference herein.
STATEMENT OF GOVERNMENT INTEREST
[0002] The invention described herein may be manufactured and used by or for the Government of the United States of American for governmental purposes without the payment of any royalties thereon or therefor.
Continuations (1)
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Number |
Date |
Country |
Parent |
09448405 |
Nov 1999 |
US |
Child |
09770741 |
Jan 2001 |
US |