9413 results about "Micro heat exchanger" patented technology

This invention is related to so-called combined cycle co-generation installations, and it addresses present concerns of the industry. Among these, combustion stability, corrosion (due to large water content in the flue gases), large heat transfer areas, and the like. In some embodiments, an additional heat exchanger is added to heat combustion air with a portion of the exhaust gases resulting from an engine, preferably a gas turbine. As a result, the efficiency of the cycle will improve, the oxidant will be enriched by above 50% oxygen, the combustion process will be enhanced, and the dimensions of the boiler may be reduced. It is considered that the combustion air will require between 10% and 80% of the total flue gas volume, more preferably between 20% and 40%. This is the portion of the flue gases sent through the heat exchanger. A control system designed to optimize the flow of the different streams is also presented. Other inventive embodiments forego heat exchanges in lieu of precise control of two flows of exhaust gas, with preferred addition of additional oxidant to the boiler bumers.

Disclosed is a system for thermally conditioning and pumping a fluid. The system includes a thermoelectric heat exchanger having a thermoelectric device configured to pump heat. Heat exchangers are provided for transferring heat to and from the thermoelectric device and for generating a fluid flow across the thermoelectric device. The conditioned fluid may be placed in thermal communication with a variety of objects, such as a vehicle seat, or anywhere localized heating and cooling are desired. Thermal isolation may also be provided in the direction of flow to enhance efficiency.

A microchannel heat exchanger coupled to a heat source and configured for cooling the heat source comprising a first set of fingers for providing fluid at a first temperature to a heat exchange region, wherein fluid in the heat exchange region flows toward a second set of fingers and exits the heat exchanger at a second temperature, wherein each finger is spaced apart from an adjacent finger by an appropriate dimension to minimize pressure drop in the heat exchanger and arranged in parallel. The microchannel heat exchanger includes an interface layer having the heat exchange region. Preferably, a manifold layer includes the first set of fingers and the second set of fingers configured within to cool hot spots in the heat source. Alternatively, the interface layer includes the first set and second set of fingers configured along the heat exchange region.

A heat engine (10) achieves operational efficiencies by: 1) recovering waste heat from heat engine expander (14) to preheat heat-engine working fluid, 2) using super-heated working fluid from compressor (402) to pre-heat heat-engine working fluid, and 3) using reject heat from condenser (93) and absorber (95) to heat the heat-engine boiler (12). A dual heat-exchange generator (72) affords continuous operation by using gas-fired heat exchanger (212) to heat generator (72) when intermittent heat source (40), e.g., solar, is incapable of heating generator (72). The combination of heat engine (10) and absorption and compression heat transfer devices (60, 410) allows use of low-temperature heat sources such as solar, bio-mass, and waste heat to provide refrigeration, heating, work output including pumping and heating of subterranean water and electrical generation.

A vehicle temperature control apparatus for controlling temperature of a temperature control object, which is at least one of inside air of a vehicle compartment and a vehicle component, includes a heat capacitive element capable of storing heat, a refrigeration cycle in which heat is absorbed from a low temperature side and is dissipated to a high temperature side, a heat exchanger that causes the heat capacitive element to exchange heat with refrigerant of the refrigeration cycle, and a heat dissipation portion which dissipates heat in the refrigerant of the refrigeration cycle to the temperature control object. Thus, a temperature control by using the heat capacitive element can be effectively performed.

The invention discloses an automatic cleaning treatment method and an automatic cleaning treatment system of an air-conditioning heat exchanger. The automatic cleaning treatment method comprises the following steps: after an air-conditioner is started, judging whether the starting condition of automatic cleaning treatment of the air-conditioning heat exchanger is met; if yes, starting the refrigerating mode of the air-conditioner to enable surface of the heat exchanger to frost, and judging whether frosting is finished; after the frosting is finished, controlling the refrigerating mode of the air-conditioner to turn off, starting the air supply mode, then, starting an indoor draught fan to enable frost on the surface of the indoor heat exchanger to melt to water, and judging whether defrosting is finished; and after the defrosting is finished, controlling the heating mode of the air-conditioner to start, drying the heat exchanger, and ending cleaning. According to the invention, the inner side heat exchanger frosts after the temperature is rapidly decreased and covers and wraps dust and germs during frosting, the dust and germs on the heat exchangers are rapidly discharged along with water flow of a large quantity of defrosting water generated during the defrosting process, and automatic cleaning is realized through redrying treatment.

A heat exchanger integrated into an electric vehicle's battery pack enclosure is provided, where the heat exchanger conduits are mechanically and thermally coupled to the inside surface of the enclosure base plate and where the battery pack enclosure is mounted such that ambient air flows over the outside surface of the enclosure base plate during vehicle motion. A thermal management system is coupled to, and controls operation of, the integrated battery pack heat exchanger such that in a first operational mode the heat exchanger is thermally coupled to the batteries within the battery pack, and in a second operational mode the heat exchanger is thermally decoupled from the batteries within the battery pack.

Apparatus for maintaining the temperature of a component of a gas turbine engine below a predetermined maximum working temperature comprises a reservoir for a cooling fluid having a boiling point below the working temperature and in which the component is immersed or with which it is in contact. At least two heat exchangers are associated with the reservoir and operable to effect condensation of vaporized cooling fluid and return of same to the reservoir. Preferably the apparatus is a closed system incorporating three heat exchangers respectively adapted to effect heat exchange with engine fuel, compressed air derived from a fan or low pressure compressor of the engine and ambient air. Means may advantageously be provided to ensure return of condensed cooling fluid to the reservoir when the attitude of the reservoir is altered as a result of aircraft maneuvers.

An accumulator for an air-conditioning (refrigeration or heat pump) system is designed to reduce flooding due to greater effective internal volume while at the same time incorporating an internal heat exchanger for better system performance, and providing better evaporation and controlled thermal properties. The accumulator embodies an outer housing that co-axially surrounds an inner liner. The inlet directs the refrigerant into the inner volume formed by the liner, wherein the liquid refrigerant and compressor oil are contained and insulated from the wall of the outer housing. A heat exchanger is arranged in the annular space between the outer housing and the inner liner and circulates a flow of condensate therethrough before delivering it to the expansion device. In this way the condensate is cooled for higher performance and at the same time refrigerant passing out of the accumulator is vaporized more completely.

Integrated circuit (IC) packages employing two-phase microchannel heat exchangers for cooling the packages' IC dies and cooling systems employing the same are disclosed. The heat exchangers include thermal masses having a plurality of microchannels formed therein. In one set of configurations, the IC die is thermally coupled to a pair of microchannel heat exchangers disposed on opposite sides of the die. Top-side microchannel heat exchangers include a thermal mass having a plurality of open microchannels having wall bases that are hermetically sealed with the top surface of the die, thus forming a plurality of closed microchannels. Alternatively, a separate microchannel heat exchanger is thermally coupled to an IC die and operatively coupled to the IC die via coupling to a substrate on which the IC die is mounted. Bottom-side heat exchangers include substrates and chip carriers having microchannels formed therethrough that are thermally coupled to the IC die. The cooling systems employ a plurality of microchannel heat exchangers to cool selected electronic components.

The invention discloses a cleaning control method for an indoor heat exchanger of an air conditioner. The cleaning control method includes the steps that when the air conditioner gets into the automatic cleaning mode, the refrigeration mode is started; evaporating temperature is reduced to enable water in air to be condensed into frost or thin ice on the indoor heat exchanger; after the air conditioner continuously runs in the refrigeration mode for set refrigeration time, the running mode of the air conditioner is switched to the heating mode from the refrigeration mode so that the frost or the thin ice on the heat exchanger can be thawed to clean the heat exchanger. The invention further discloses the air conditioner. By means of the cleaning control method and the air conditioner, automatic cleaning of the indoor heat exchanger of the air conditioner can be achieved, and therefore it can be avoided that the heat exchange efficiency of the heat exchanger is reduced.

The present application relates to a system for dynamic control of the operation of a heat exchanger, the system comprising a heat exchanger, a plurality of injector arrangements, a local sensor arrangement, and a controller, wherein the local sensor arrangement comprises a plurality of local temperature sensors being arranged to measure temperature values; and wherein the controller is arranged to determine a difference between the measured temperature values and is further arranged to communicate with the valves of the plurality of injector arrangements to adjust the local amount of first fluid supplied by at least one of the injector arrangements in order to even out the determined difference. The application also relates to a method for the dynamic control of the operation of a heat exchanger in such a system.

A heat exchanger and battery unit structure is provided for cooling battery units (or cells) where the thermally conductive nature of the battery forms a cooling path. The heat exchanger is in the form of a cooling element provided with an engaging device formed on or attached to an outer surface of the cooling plate for receiving and/or engaging with a corresponding engaging portion on a battery unit (or cell). The interconnection between the battery unit (or cell) and heat exchanger creates a mechanical interlock between the two components that results in improved heat transfer properties between the two components.

A heat recovery system comprising: an LNG warmer; at least one item of equipment requiring cooling and thereby generating waste heat; a heat exchanger arranged to provide heat exchange between the LNG warmer and the waste heat, whereby said waste heat can be used to provide warming for the LNG; wherein said heat exchanger is a closed loop heat exchange means, whereby the heat exchange fluids in said heat exchanger are substantially retained within the heat exchanger during operation of the system. This enables the system to be operated offshore without needing to use the surrounding seawater to provide cooling for the waste heat from the equipment.

An illumination device comprises a circuit board that carries solid-state light sources and a heat transfer structure to which the circuit board is intimately physically coupled such that the circuit board is curved along at least one of a longitudinal dimension or a lateral dimension thereof. Such may allow less fasteners to be used than would otherwise be possible, while maintaining close contact over a large portion of the surface area. Some embodiments may employ a clamp, for example a peripheral clamp such as a cover or bezel clamp.

A zone-control unit for use in a heating, ventilation, and air conditioning (HVAC) system, the zone-control unit includes a heat exchanger, an inlet piping assembly coupled with the heat exchanger for supplying fluid to the heat exchanger, an outlet piping assembly coupled with the heat exchanger for receiving fluid from the heat exchanger, a bracket that maintains the inlet piping assembly and the outlet piping assembly in positional relationship, and an ancillary component coupled with the heat exchanger.