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AssigneesSofame, Societe en Commandite Gaz Metropolitain, Gaz de France
InventorsLuc Mandeville, Stephane Brunet, Michel Dallaire, Pascal Bocherel
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A dual direct contact water heater is described and consists of a heater housing having two sections, each section having a water reservoir. One section provides hot water at a high temperature and provides a source of heat exchange to heat an external source of water for commercial use. A burner is provided in the first section to provide the heat source to a packing through which water percolates. The source of water for the first section is the outlet of a heat exchanger whereby water from the reservoir is recirculated in a closed circuit in the first section. Hot gases rising from the first section is directed to a second section which also includes a second packing and a reservoir and it also has a closed loop whereby a second source of hot water, at a lower temperature, is utilized in a closed loop and in heat exchange with a second external source to produce domestic hot water or without heat exchanger to produce hot water for various processes. The fumes at the exhaust port of the second section are cooled considerably whereby the total efficiency of the water heater is greatly increased.
A direct contact water heater comprising a two-section housing with a first and a second of said sections being disposed side-by-side, a first water spray nozzle secured adjacent a top portion of said first section for spraying water to be heated downwardly on a first packing of heat exchange bodies held in a region of said first housing by support means, a burner connected to a bottom portion of said first housing section and disposed to heat water in a first water reservoir contained within said first housing section, a second packing of heat exchange bodies held in said second housing section spaced above a second water reservoir by further support means, a second water spray nozzle in said second housing section above said second packing for spraying water downwardly on said second packing, a second hot water reservoir defined in said second housing section in a space below said second packing, an exhaust gas flue communicating with a top portion of said second housing section, intermediate communicating passage means for the passage of hot gases from said first packing in said first housing section to a space intermediate said second packing and said second hot water reservoir in said second housing section, and pump means associated with a respective one of said first and second water reservoirs to circulate hot water therefrom to respective external heat exchange devices, connected respectively in a closed circuit, and using said burner.
Dependencies are inferred from the claim text.