Abstract: Only a limited number of organic or silicone liquid phase thermal exchange fluid types are suitable for operation over a wide range of hot and cold temperatures and these have an undesirable property of degrading at high temperatures. It is accordingly desirable to subject the thermal exchange fluid to high temperature only to the extent and times required by users. The present invention includes intermittent users which occasionally are required to attain maximum working temperatures at which thermal degradation of thermal exchange fluid occurs at a significant rate and a hot reservoir at the minimum working temperature. A stable heat transfer fluid transfers heat from the hot reservoir to the degradable thermal exchange fluid through a common intermediate heat exchanger. The degradable thermal exchange fluid is heated to a temperature just sufficient to satisfy the maximum current setpoint temperature of the intermittent users by controlling circulation of the stable heat transfer fluid.

Abstract: An improved air conditioning system of the type wherein a conditioned fluid is conveyed from a central plant to a remote location where the fluid exchanges heat prior to being returned to the central plant for reconditioning. The system is provided with storage means for the fluid at the central plant and the remote location with a single conduit extending therebetween. Nonsimultaneously, pumps convey fluid through the single conduit from the central plant to the remote location and from the remote location to the central plant. In one embodiment, phase change may be employed to augment heat exchange capability at the remote location, or satellite.

Abstract: A pump for a central heating system having a tubular housing and a motor for driving an axial flow impeller which is mounted within the housing, the motor having casing mounted within the tubular housing, forming a liquid flow passage between the outer surface of the casing and the inner surface of the housing, the motor being adapted to be powered by electricity supply of a frequency greater than 70 Hertz, wherein the impeller is mounted upstream of the motor, and guide vanes are mounted in the annular passage to smooth the flow of liquid from the impeller.

Abstract: A heater system comprising a main water discharge and main water return adapted for connection to space or domestic hot water heating means, a main water heater operative for heating water flow therethrough and connected in series with a main pump, and a control system adapted for connection to the space or domestic water heating means and operative to actuate the pump and cause the heater to heat water passing therethrough in response to a signal from a thermostatic sensor in the space or domestic water heating means.

Abstract: A very well heat insulated water storage or accumulator tank of relatively large capacity as compared to the capacity of the hot water heating unit is interposed between the unit and the radiator system and is interconnected with the unit. Heated water from the top portion of the tank is used to preheat the unit prior to actuation thereof, and mixed water above a given temperature is fed to the unit from the tank during actuation, such that the corrosive condensation on the heating surfaces of the heating unit, caused by heating a cold surface, is eliminated thereby extending the useful life of the unit. When the unit is actuated, heated water from the unit fills the tank from the top side until a volume of non-heated return water from the radiator system, approximately equal to the capacity of the unit, remains in the bottom of the tank.

Abstract: A central heating system comprising a heat exchanger, heat dissipating means, and a connecting piping circuit for liquid flow, has a pump capable of pumping the liquid around the circuit at a lower or a high flow rate, the flow rate of liquid being sensed to control the means which supplies heat to the heat exchanger so that heat is supplied when the pump means is operating at its higher rate and is not supplied when the pump means is operating at its lower rate. The rate of operation of the pump means is determined by means which senses the temperature of the circulating liquid so that the pump means operates at its lower rate when the temperature of the liquid exceeds a selected value and at its higher rate when the liquid temperature is below a selected value.

Abstract: A water filled coil in the rear of a fireplace is connected to a hot water storage tank so that heated water in the coil can circulate into the tank. A second hot water storage tank is connected to the first storage tank and an aquastat associated with the first tank controls the flow of water between the two tanks. Heat exchanger coils within the two storage tanks are used to preheat incoming cold water before it is fed to a domestic hot water heater. Another heat exchanger coil within the second storage tank is interconnected with the main baseboard hot water heating system and furnace. Automatic by-pass valves and aquastats are adapted to turn the furnace off and utilize the heat exchanger coil when the fireplace is providing sufficient hot water and are adapted to fire the furnace and bypass the heat exchanger coil when insufficient heat is provided by the fireplace.

Abstract: A space heating system having a low inertia (low mass and low water content) boiler and a larger heated water storage tank providing a bank of hot water (hereafter called the heat bank) and a "fly-wheel" effect. This provides a thermal bank or load leveler. The temperature of the water in the tank controls "on-off" operation of the furnace of the boiler. The heat sensing means for the heated space controls only the operation of the circulator in the system. A plurality of zones with a common return may be used. The flow rate from the boiler into each of the zones is controlled to be less than the rate of flow from the boiler to the heat bank so that its stored supply of heated water may be quickly established. A domestic water heating coil may be mounted in the heat bank. The connection from the boiler to the heat bank is preferably to the top of the tank which forms the heat bank. The connections to the domestic water heating coil are also preferably at the top of the heat bank.

Abstract: A method of removing a gas from a mixture of the gas and a liquid of greater density than the gas comprising introducing the mixture continuously into a hollow body in the form of a jet of the mixture, impinging the jet of the mixture onto a surface within the chamber, the jet of mixture and the surface being so arranged as to cause the mixture to spread over the surface and to cause the gas to separate from the spreading mixture and rise to a vent at the uppermost part of the hollow body, the liquid then being removed from the hollow body.

Abstract: A water boiler adapted for use in a fireplace is disclosed having an inlet header pipe, an outlet header pipe, and a series of pipes disposed parallel to one another and connected between the inlet and the outlet header pipes. The series of pipes is fashioned so as to form a grate suitable for supporting a log fire, including a horizontal portion upon which the logs may be supported and a remaining portion which extends upward along the rear wall of the fireplace through an arc back toward the top front of the fireplace, whereby heat rising from the fire passes between the series of pipes for added boiler efficiency.A heating system using the fireplace boiler and operating in conjunction with a conventional residential heating system is also disclosed. The fireplace boiler contributes heat a conventional furnace to reduce the amount of energy consumed by the latter.

Abstract: A thermal distributing unit for thermal working fluid, primarily for heating and/or air conditioning purposes, comprises a first or thermal supply stand having a main supply connection and a main return connection for the or each thermal working fluid, a second or electricity supply stand equipped with an electrical connection for receiving an electric power supply from an outside source, and an intermediate structure interconnecting the said first and second stands which structure carries rows of paired subsidiary supply and return connections for the thermal working fluid or fluids. The subsidiary supply and return connections communicate with the main supply and return connections through manifolds on the intermediate structure. The said structure may also carry, for the working fluid or fluids motor-driven circulating pumps and control valves associated with the pairs of subsidiary connections.

Abstract: A device for the temperature regulation of water which is used in motor vehicle heating and air conditioning systems. This device contains a primary and a secondary circuit which is linked by a cruciform connector in a hydraulically switchable manner. The primary circuit includes a cooling circuit heat exchanger and a cooling water pump, with the secondary circuit containing a heater heat exchanger and a water pump driven by an electric motor.

Abstract: A heat generator of the type condensing the combustion products of a liquid or gaseous hydrogen fuel suitable for the heating of a heat-bearing fluid, including a tank containing at the top a zone of direct contact between the heat-bearing fluid and the combustion products, a collector for the heat-bearing fluid coming from the zone of direct contact, a convection heat exchanger arranged in the path of the combustion products, a combustion zone at a pressure close to atmospheric pressure, and a conduit which connects the collector of the heat-bearing fluid to the convection heat exchanger and is provided with a pump for replacing under pressure the portion of the heat-bearing fluid coming from the collector and intended to pass through the convection heat exchanger.