4380912 Double wall tube assembly for use in heat exchangers

New Patents

4381031 SPA-DOMESTIC HOT WATER HEAT EXCHANGER Larry Whitaker; Donald M. Herriott

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the volume of the internal chamber and thus increase the efficiency and sensitivity of the heat transfer, the absorber is formed with curved walls to define an internal chamber having a crescent-shaped cross-section. 4380987

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CIRCULATING FUEL HEATING SYSTEM FOR INTERNAL COMBUSTION ENGINES Theron Crain

A first heat exchanger loop incorporates a thermostatically controlled circulating pump which draws hot water from the heater. Spla water is circulated by the spa pump through a second heat exchange loop surrounding the first. The thermostat sensor detects spa temperature when the spa pump is on and detects heater temperature, and therefore automatically shuts off the circulating pump, when the spa pump is off.

4380995 SOLAR ENERGY CONVERTERS AND ABSORBERS THEREFOR Alastair Robertson

Solar energy converters convert solar radiation into usable heat energy by means of a reflector which collects and focuses the solar radiation onto an absorber provided with an internal chamber through which a heat exchange fluid may be passed. As the absorber is heated by raddiation focussed thereon the heat may be extracted into the fluid. To minimize

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A circulating fuel heating system for internal combustion engines of both gas and diesel typles. The system is sizeable through staged heat exchanger components to provide the necessary fuel heating for various engine sizes and fuel consumption rates. The system basically comprises a plurality of staged fuel/hot water heat exchangers, a fuel controller interposed between the heat exchangers and the carburetor bowl, a by-pass/metering valve and a vapor capture system for returning unused fuel to the heat exchanger and a fuel/exhaust manifold heat exchanger operably connected to the controller to satisfy initial heating requirements for the period after cold-engine starting.

4380912 DOUBLE WALL TUBE ASSEMBLY FOR USE IN HEAT EXCHANGERS

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New Patents

Ray Edwards; assigned to Edwards Engineering Corp. i i

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Double walled tube assemblies to meet local code requirements for heat exchangers passing potable water there through in non-contacting heat exchange relation for example refrigerant to liquid heat exchangers for reclaiming heat from refrigeration cycles and systems have a first or outer tubular member for passing a first fluid such as hot compressed refrigerant gas therethrough and a second or inner tubular member connected for operative relation to the first tubular member for passing the potable water to be heated therethrough. The second or inner tubular member shaped, sized, and connected to the first or outer tubular member to establish optimum heat exchange relation between the first tubular member and the second tubular member when formed into heat exchange units.

4380909 METHOD AND APARATUS FOR CO-GENERATION OF ELECTRICAL POWER AND ABSORPTION-TYPE HEAT P U M P AIR CONDITIONING Harry M. Sung; assigned to Chevron Research Company

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A method for co-generation of electrical power and air conditioning for structures, such as office buildings, and housing units is disclosed. An internal combustion engine, preferably a diesel, drives an alternator or generator to suplply the building electrical load or for reverse sale to a public utility power grid. Heat from engine exhaust gases is recovered by an absorption-cycle heat-pumpl system. The system is characterized by using only a single external heat exchanger and a single building air conditioning heat exchanger for selectively heating or cooling air in the air conditioning system. Selection of heating or cooling is by reversable valve means for directing heated refrigerant vapor from a heat powered vapor generator either into the inside heat exchanger for heating or to the external heat exchanger for cooling. The valve means simultaneously converts the other heat exchanger to complimentarily receive liquid refrigerant passing through and expansion valve from the first heat exchanger to absorb heat from the air conditioner for cooling, or from the atmosphere for heating. A particular advantage of this arrangement is reduction in both size and complexity of the vapor generation system to satisfy a wide range of loads