Sofame Inc.

Gaz De France

Societe En Commandite Gaz Metropolitain

Other

Brooklyn Union Gas Co.

New York Gas Group

Gas Metropolitain Inc.

Gaz Metropolitain

Chaudiere Seccacier

Luc Mandeville

Pascal Bocherel

Michel Dallaire

Stephane Brunet

Kebir Ratnani

Remi Pierre Guillet

Daniel Billy

Georges Vabre

A gas-fired direct-contact water heater system 10 is described. It consists of a first housing 11, 50, 80 having a packing 16, 51, 81 of heat exchange elements 17 and on which water is sprayed. A burner 18, 52, 83 is disposed on the side of the housing under the packing. A combustible gas feed pipe is connected to the burner 18, 52, 83 to provide a combustible gas to the burner. A water collection reservoir 20, 58, 86 is defined below the burner for collecting heated water. A further packing 31-59-91 having heat exchange elements is located in a further housing 30-60-90 and it is also sprayed water. Ambient air is admitted under this packing by a blower 32-63-101 whereby the air is humidified and heated and supplied to the burner for admixture with the gas whereby to obtain a higher combustion product dew point and a reduction in the NO.sub.x emission when burned. A further water collecting reservoir 35, 62-93 is defined in the second housing 30-60-90 below the packing 31, 59, 91 for collecting water percolated through the further packing. Heated water is convected through a first conduit 36, 69, 107 from the water collection reservoir 35, 62, 93 in the first housing. A further conduit 36, 76', 99 is also provided for convecting water from the further housing. The flue gases from the first packing are also cooled in a third packing before being released to atmosphere.

High efficiency direct-contact high temperature water heater

An air heating and humidifying system and method using direct contact heating principles. The system consists in providing a source of hot water by feeding hot flue gases in a direct contact water heater and wherein the water sprayed over a packing in the water heater is heated as it percolates through the packing and is in contact with the hot rising flue gases. This hot water from the direct contact water heater is used in a direct contact air treating chamber wherein it is sprayed over a further packing whereby to heat and humidify fresh air which is pushed through the packing by a fan and exits at an outlet flue of the treating chamber to supply hot moist fresh air in a building air conditioning system. The cooled water in the direct contact air treating chamber is collected and supplies the spray nozzle of the direct contact water heater to cool the hot flue gases which are rising therein and thereby enhances considerably the efficiency of the direct contact water heater.

Air heater and humidifier using direct contact heating principles and

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.

Direct contact water heater with dual water heating chambers

Low NOX and CO emissions direct contact high temperature water heater

A direct contact water heater having a hybrid heat source, and its method of operation is described. The water heater is comprised of an elongated vertical tubular housing having a water spray nozzle in an upper end thereof for spraying water substantially uniformly over a top packing of heat exchange bodies. An intermediate space is provided below the packing where external hot recovery gases are admitted into the housing. A burner chamber is provided at the bottom of the housing above a reservoir to provide a primary heat source. Heat from the primary heat source mixes with the hot recovery gases below the packing, and is in counter-current flow with the water percolating through the housing from the packing located at the top of the housing. Two packings of heat exchange bodies may be provided in the tubular housing spaced from one another with the hot recovery gases fed between the two packings and the primary hot gas from the heat source being generated below a lower one of the packings.

Direct contact water heater with hybrid heat source

Growing community of inventors

Terrebonne, Canada

Luc Mandeville