Abstract: A heat pipe can be formed with a helical groove to allow easy bending, but the groove cannot be formed adequately deep. This allows the heat pipe to spring back during bending, thus making it difficult to use.A heat pipe transfers heat using a working liquid sealed under decompression in a sealed tube. Helical ribs are formed from: a deep groove 12a cut radially and disposed on the outer perimeter surface of sealed pipe 10; and a thin groove 12b formed on the inner perimeter surface to generate capillary action. Deep groove 12 allows easy bending and ensures that deformation is maintained, while thin groove 12b provides capillary action to allow circulation of the working liquid in sealed pipe 10. To make the heat pipe, a shaft-shaped metal core 8 is formed with helical ribs 9 at a prescribed axial pitch on the perimeter surface. An outer cylinder 10a, which will form sealed tube 10, is fitted to the outside of shaft-shaped metal core 8.

Abstract: The support grating system for the heat exchange baskets of a rotary regenerative air preheater is arranged to be able to make full use of the rotor volume for the heat absorbent material. Support gratings can be located inside of the volume of the rotor enclosed by the pin rack assembly and baskets can still be loaded. This is accomplished by installing certain of the support gratings or portions thereof after the baskets have been loaded into position in the basket layer inside of the pin rack assembly.

Abstract: A heat exchanger is disclosed which is designed to be fabricated from sheet material. The heat exchanger core assembly comprises a plurality of stacked substantially identical strips of formed sheet members each having a plurality of troughs formed therein. The troughs are positioned in nested relationship so as to define fluid flowpaths through the core assembly and between headers secured to opposite ends of the core assembly. Each of the troughs includes a bottom portion having a plurality of openings therein through which fluid may flow. In one embodiment the openings are in the form of louvers. In another embodiment, the openings are rectangularly shaped and offset between successive strips in the stack so as to impart a mixing action to the fluid flowing through the core. Heat radiating fin portions separate the respective fluid flowpath defining troughs and may include louvered-like openings therein. A method of fabricating the heat exchanger is also disclosed.

Abstract: A swing-arm sootblower for a rotary regenerative air preheater is mounted to sweep across the air preheater rotor at an adjustable constant speed or angular velocity. The sootblower has means for sootblowing with a relatively low pressure medium such as air or steam or with high pressure water. The nozzle unit is equipped with a low pressure nozzle and a plurality of high pressure nozzles. The high pressure nozzles are arranged in a row and the nozzle unit is mounted so that the row is at an angle to the swing arm such that the row of high pressure nozzles is parallel to the heat transfer plates and tangential to the rotor at the outside of the swing of the arm.

Abstract: There is provided a heat pipe assembly 10 formed of dissimilar materials for the heat pipe 18 integrated with the host structure 16 in a manner that optimizes removal of unwanted heat generated by various devices on a space or terrestrial platform 14. A conventional heat pipe construction 18 mounted within a circular cross-section channel 28 formed in a retaining block 26 leaving an annular gap 30 between the outside surface wall 33 of the heat pipe and the inside surface wall 32 of the channel 28. A heat conductive fluid 40 is injected into the annular gap 30 permitting the dissimilar CTE materials to thermally expand and contract as the platform or structure 14 experiences extreme temperature changes.

Abstract: The present invention is a heat sink with a heat transfer medium for enhancing the heat transferring ability of the heat sink. In one embodiment, the heat sink comprises a plurality of fins with cavities, a base and a fluid heat transfer medium. The fins are in thermal contact with the base and configured to form a series of longitudinal channels through which air or a fluid medium may pass. The fluid heat transfer medium contained within each of the cavities. The fluid heat transfer medium enhances the heat sink's ability to transfer heat without increasing its surface area, size and/or weight. This enhancement is due to the fluid heat transfer medium's latent heat of vaporization and condensation. Specifically, a larger amount energy is required to vaporize the fluid heat transfer medium. Thus, a large amount of heat can be conducted from the base to the fluid heat transfer medium.

Abstract: A heat recovery unit comprising a case (1), which encloses at least one regenerative heat accumulator (5), whereby the casing (1) has a supply air opening (10), an exhaust air opening (15), an exterior air opening (20) and a under-air opening (25), and whereby exhaust air and supply air alternately pass through the heat accumulator (5). The heat accumulator (5) has, via a rotational movement, a valve function which opens and respectively closes the openings (10-25) when the heat accumulator (5) rotates from a first position for exhaust air throughflow to a second position for exterior air throughflow.

Abstract: A heat sink comprising: a body having an envelope including a flexible portion for thermal contact with a heat source, the envelope being filled with a thermally conductive liquid; and a thermosyphon having one end disposed at least partly within the liquid in the body to absorb heat from the heat source and another end disposed outside the envelope to dissipate heat.

Abstract: Described is a thermal energy storage and delivery system for delivering thermal energy to both a passenger compartment of a vehicle and a component, such as a battery, located externally of the passenger compartment. The system capitalizes on excess capacity stored in a thermal energy storage apparatus, to heat the external component in addition to the passenger compartment.

Abstract: A plate-type heat exchanger configuration which facilitates fluid flow along a generally "L" or "S" shaped path and which includes a plurality of heat exchanger plates with at least one of the edges comprised of a pair of edge sections which terminate in different edge configurations. The invention also relates to a plate configuration for such a heat exchanger.

Abstract: A heat exchanger tube includes ribs formed in protrusion on an internal surface of the tube and extending spirally with a suitable distance between adjacent ribs, concavities formed on the external surface of the tube and extending spirally with a suitable distance between adjacent concavities, and a plurality of independent projections formed on the external surface of the tube and laid out spirally. The projections are formed with a recess on their top surfaces in such a way that a portion aligned with the ribs on the internal surface of the tube is lower than a portion aligned with an area between the ribs. Further, the concavities on the external surface of the tube and the ribs on the internal surface of the tube are formed at mutually aligned positions.

Abstract: An improved planar heat pipe wick structure having projections formed by micromachining processes. The projections form arrays of interlocking, semi-closed structures with multiple flow paths on the substrate. The projections also include overhanging caps at their tops to increase the capillary pumping action of the wick structure. The capped projections can be formed in stacked layers. Another layer of smaller, more closely spaced projections without caps can also be formed on the substrate in between the capped projections. Inexpensive materials such as Kovar can be used as substrates, and the projections can be formed by electrodepositing nickel through photoresist masks.

Abstract: An accumulator (20) operating according to the layered storage principle is used in connection with the cooling loop of a vehicle, and includes charge alternation devices (34, 38) adapted to upper and lower storage regions (26, 28). The inflow and outflow velocity of the coolant should be between 0.1 and 0.5 m/s, and charging or discharging of the accumulator (20) should occur within 10 to 100 seconds. Inflow and outflow lines (32, 36) run within an insulation space (40) in the fashion of a thermosiphon.

Abstract: An extruded, tiered high fin density heat sink (10) uses extruded first base, second base and bridging elements (12, 16, 14) having an arrangement of closely spaced, parallel fins (20, 26, 32, 38) and recesses (22, 28, 34, 40) for receiving opposing fins in the elements. The fins (20, 38) in the first and second base elements (12, 16) are bonded to recesses (28, 34) in opposite common faces (24, 30) of bridging elements (14) while fins (26, 32) extending from both opposing faces (24, 30) of bridging element (14) are bonded in aligned recesses (22, 40) in the first and second base element (12, 16) forming an extruded, tiered, high fin density heat sink (10).

Abstract: Electronic apparatus is disclosed having components mounted within an environmentally sealed external enclosure. The external enclosure is made of heat conductive material and some of the components are mounted in heat conductive association with one or more walls of the external enclosure. The apparatus includes at least one heat pipe that has an evaporator in thermally conductive contact with a wall of the external enclosure proximate to one of the components. The condenser of the heat pipe is located outside the external enclosure and is provided with thermally conductive fins. Components that generate large amounts of heat can thus be provided with additional cooling reducing local hot spots. The external enclosure may be designed for the larger market in temperate climates, and be modified for hotter climates.

Abstract: The present invention includes a method, an apparatus, and a system for the treatment of waste. The method includes the steps of providing a cold waste solids tank that has a cold solids batch therein. The cold solids batch is transferred, after being warmed, from the cold waste solids tank to a thermal conditioning tank for thermal conditioning. A hot waste solids tank remote from the cold waste solids tank is also provided. The cold waste solids tank is filled with a new cold solids batch. The new cold solids batch is pumped from the cold waste solids tank through a heat exchanger, the partially cooled hot waste solids batch is simultaneously pumped from the hot waste solids tank through the heat exchanger. Heat is transferred from the partially cooled hot waste solids batch to the new cold solids batch in the heat exchanger to obtain a pre-warmed solids batch and to obtain a cooled solids batch. The cooled solids batch is discharged from the hot waste solids tank.

Abstract: In an air conditioning apparatus for a vehicle, a water/refrigerant heat exchanger is disposed at a refrigerant discharge side of a compressor of a refrigerant cycle, and a cooling unit for cooling a heat-generating unit with refrigerant having an intermediate pressure of the refrigerant cycle is disposed at a downstream refrigerant side of the water/refrigerant heat exchanger. The air conditioning apparatus includes an evaporator and a hot-water type heater core disposed in an air conditioning duct. In a cooling water circuit, an engine, a radiator and an electrical pump are disposed in addition to the water/refrigerant heat exchanger and the hot-water type heater core. Thus, refrigerant absorbs heat generated in the heat-generating unit, and is heat-exchanged with cooling water in the water/refrigerant heat exchanger after passing through the compressor.

Abstract: A heat exchanger having a first counterflow heat exchange unit with first and second segments wherein a flow of at least one product from a cryogenic air separation unit is channeled in a first direction along both the first and second segments and a second counterflow heat exchange unit is juxtaposed to the second segment of the first counterflow heat exchange unit and receives a flow of feed air which is channeled in a second direction that is counter to the first direction and allows heat exchange between the product and the air. A crossflow subcooling unit is juxtaposed to the first segment and receives at least one process cryogenic liquid from the air separation system for subcooling.

Abstract: A low electro-magnetic radiation emissions heat sink that dissipates heat away from an integrated circuit package by means of conduction to the electronic chassis. The heat sink may also include a ferrite ring for reducing electro-magnetic radiation emissions from the integrated circuit package by increasing the electrical impedance of the EMI transmission path between the integrated circuit package and the electronic chassis, thus reducing the capacitive coupling and RFI concerns of conductive heat dissipation. The heat sink of the present invention may also include fins that are external to the electronic chassis for greater heat dissipation by means of external air convection.

Abstract: The present invention provides a condenser which is free from pressure loss of air stream due to an air exhaust pipe and loss of thermal energy, and which is compact. In the condenser according to the present invention, deflector plates 27b are disposed in a vertically central part of a first cooling pipe bundle having a number of cooling pipes extended in parallelism with each other and in a first horizontal direction of the condenser. The deflector plates 27b are diverged downward to both sides and provide a roof of air cooling chambers 24a, 24b. Second cooling pipe bundles 25a, 25b are disposed respectively in the air cooling chambers 24a, 24b. An air exhaust inner pipe 29 is extended upward in the first cooling pipe bundle 20 in communication with upper spaces 34a, 34b in the air cooling chambers 24a, 24b.