Abstract: Regenerative heat exchangers are described for transferring heat between hot and cold fluids. The heat exchangers have seal-leakage rates significantly less than those of conventional regenerative heat exchangers because the matrix is discontinuously moved and is releasably sealed while in a stationary position. Both rotary and modular heat exchangers are described. Also described are methods for transferring heat between a hot and cold fluid using the discontinuous movement of matrices.

Abstract: A heat exchanger, especially a heating heat exchanger in the engine cooling circuit of a motor vehicle is disclosed. A forward-flow pipe opens at the top into a water box. A vent line of small cross-section is assigned to the forward-flow pipe and is guided to a compensating tank and there terminates below the liquid level. In order to obtain a simply constructed and at the same time highly effective venting facility, the vent line is brought into the operative position together with the fastening of the forward-flow pipe and is guided away from the highest point of the forward-flow water box to the compensating tank located at a distance therefrom.

Abstract: A fuel vapor recovery device having: a condenser in communication with fuel vapor from a fuel tank, the condenser condenses fuel from the fuel vapor; a reservoir collecting condensate from the condenser, the reservoir maintains the condensate at a temperature sufficient to maintain the condensate in a liquid state; and return means returning the condensate to the fuel tank. Also disclosed is a method of removing fuel from a fuel vapor including the steps of: passing the fuel vapor from a fuel tank through a condenser; condensing the fuel from the vapor; cooling the condensate to a temperature sufficient to maintain the condensate in a liquid state; and returning the condensate to a fuel tank periodically.

Abstract: An integral heat pipe, heat exchanger, and clamping plate. A base plate functioning as an evaporator has disposed in it a multiplicity of intersecting parallel and perpendicular internal channels extending laterally substantially across the base plate. A sintered copper thermal wick is applied to all channels. Thin-walled condenser tubes forming a condenser region are joined to the base plate at intersections of width wise and cross wise channels contained in the base plate. A multiplicity of fins extend to all condenser tubes. For heat pipe arrangements operating in horizontal configurations, all wick-lined channels within the base plate remain open. For heat pipe arrangements intended to operate in oblique or vertical configurations, horizontally extending channels vertically displaced relative to other horizontal channels are isolated from the latter by a multiplicity of plugs.

Abstract: A heat exchanger adapted to handle dusty hot waste gases including a vertically oriented shell through which the waste gases flow longitudinally downward. The shell contains a tube assembly of vertical tubes having external, longitudinal heat transfer fins with the tubes being connected for fluid flow and support of their upper and lower ends to a central vertical support/header assembly. This support/header assembly is a tube divided into an upper header, a lower header and a center support tube section.

Abstract: A device for the indirect heating of air or another gas at high pressure to a high temperature, consisting of a heat exchanger of a special construction submerged in a fluid bed of the "classical type", through which flows a fluidized hot, finely powdered bed material which is introduced (2) below the bed surface (3) and discharged through an overflow (5). The heat exchanger surface is formed by hairpin-shaped tubes (6) with legs of unequal length, the shorter legs thereof discharging into the upper bottom of an inlet chamber (7) and the longer legs thereof extending down through a tubular lead-through (9) between the bottoms of said inlet chamber (7), which lead-through is concentric with said tube leg and opens into the upper bottom of an outlet chamber (8), with an annular channel between said tube (6) and said lead-through (9).

Abstract: A heat exchanger having a pair of header pipes each of which includes a U-shaped wall and a front wall connected thereto to define a hollow portion. The front wall has a plurality of arc-shaped portions and plane portions each of which is disposed between adjacent arc-shaped portions in the longitudinal direction of the header pipe. Each of the plane portions are provided with an elongated hole therethrough. A plurality of fluid tubes are disposed between the header pipes in fluid communication therewith via the elongated holes. A plurality of corrugated fins are disposed between the opposed outer surfaces of the fluid tubes. Thus, the pressure loss of refrigerant in the heat exchanger is very low.

Abstract: In the case of a vacuum insulating structure adapted for the transmission of thrust forces and more particularly for the heat storage means of motor vehicles in an evacuated insulating zone and at least in the zones with a need of bracing a continuous, load-bearing brace means of pore-forming insulating material is arranged, whose mass density is so reduced that the load-bearing capacity thereof is just sufficient to take up the thrust forces to be transmitted. The gas pressure in the insulating zone is correspondingly reduced in accordance with the necessary insulating effect.

Abstract: Water coolant circulating in a closed loop may be cooled by passing it through a heat exchanger coil embedded within a block of heavy water ice. The ice will maintain the water, passing through the coil, at a temperature approximately 39.degree. F. Maintenance of the working fluid at this temperature prevents it from freezing in coolant tubes. The system is particularly adapted for a liquid cooling space garment which must effectively conduct away heat from an astronaut's body when an astronaut exerts himself during physical activity.

Abstract: A method for attaching an elastomeric gasket (12, 70) to a thermoplastic substrate (10) comprises the steps of forming the substrate (10) with a slot (20) and an upstanding projection (22) adjacent the slot (20), deforming the projection (22) into an upper portion of the slot (20) to provide a stake thereby, and molding the elastomeric gasket (12, 70) onto the substrate (10) and into the slot (20). The elastomeric gasket (12, 70) is thereby retained on the substrate (10) by the projection (22) in cooperation with the slot (20). The substrate (10) is preferably made of a nylon material, and the elastomeric gasket (12, 70) is preferably made of an EPDM polymer.

Abstract: A closed loop, pressurized system for a ground source heat pump and a pressure/liquid source module therefore. The pressure/liquid source module has a liquid tank having a predetermined liquid level and an inlet pipe extending downwardly within the tank from adjacent the top of the tank to a distal end which is below the liquid level. The inlet pipe is adapted to be connected to the loop of the closed loop, pressurized system of the heat pump. The liquid tank has an outlet adjacent the bottom of the tank, the outlet being connected to the heat pump through a check valve and a liquid pump. The valve is between the tank and the pump.

Abstract: An arrangement of apparatus and process thereof for cooling hot fluid solid particles, especially hot regenerated catalytic particles are disclosed. The apparatus comprises a substantially vertical, cylindrical and close ended heat removal vessel through the shell side passage of which is passed the fluid solid particles that flow downwardly in the form of dense phase fluidized bed, and one or more separate heat exchange tube units through the tube side passage of which the coolant is passed and vaporized, each of said heat exchange tube units comprising a supply coolant inlet tube, a supply coolant collecting chamber, one or more heat exchange tubes, a vapour collecting chamber and a resulting vapour discharge tube, all of which constitute a close type coolant-to-vapour circulation.

Abstract: A heat pipe containing a working fluid, comprises an evaporator, a condenser, an interconnecting tube joining the evaporator and the condenser, and a regulating means for limiting the maximum temperature in the condenser to a predetermined temperature. The regulating means comprises a plug operable by means of a temperature sensitive member to move between a first position in which the plug seats in a fluid reservoir in the condenser and a second position in which the reservoir is adapted to collect the working fluid.

Abstract: A new cooling system for a jet engine integral starter/generator incorporates an array of thermosyphons in the rotor of the starter/generator in an off-axis geometry. The condenser sections of each thermosyphon extend out from the rotor into a coolant flowpath. Fins surrounding the condenser sections are oriented to increase the flow of coolant around the starter/generator. Asymmetrical balancing wicks partially cover the inside wall of the evaporator sections of each thermosyphon. The balancing wicks have the general shape assumed by a liquid working fluid during off-axis rotation. The wick cross-sectional shape is generally that of a crescent. The balancing wicks absorb working fluid when the rotor is not rotating so that the rotor will have generally the same balance at startup as it will have during full rotational speed operation.

Abstract: Various heat exchange apparatuses are described in which an oscillating flow of primary coolant is used to dissipate an incident heat flux. The oscillating flow may be imparted by a reciprocating piston, a double action twin reciprocating piston, fluidic oscillators or electromagnetic pumps. The oscillating fluid flows through at least one conduit in either an open loop or a closed loop. A secondary flow of coolant may be used to flow over the outer walls of at least one conduit to remove heat transferred from the primary coolant to the walls of the conduit.

Abstract: A road surface is warmed by means of a two-phase thermosyphon with an easily vaporizable liquid partially filling a sealed container. A portion of the container serves as a condenser and another portion as an evaporator. If at least a portion of the evaporator is above the boiling point of the liquid, the liquid will boil and the vapor will rise into the condenser part of the thermosyphon, and if the condenser part is in an environment below the condensing temperature of the vapor, the vapor will condense, thereby radiating heat and warming the surrounding environment. The condenser is elongated and installed underground so as to lie closely beneath the road surface. A thermally insulating layer is provided below the condenser part so as to more efficiently utilize the radiated heat. The evaporator may be of a double-tube structure such that the liquid can flow through the entire length thereof even if these tubes include rising and falling sections.

Abstract: A heat recouperator having a rotary wheel heat and moisture exchanger uses a random matrix media comprising a plurality of small diameter heat-retentive fibrous material which provides high thermal efficiency in exchanging heat and moisture between inlet and exhaust air streams.

Abstract: A heat exchanger tank partition device in which tank portions are partitioned into chambers by partition plates held between a pair of separable tank plates. These partition plates can be located into the required position, which facilitates assembly and provides good precision and brazing integrity. The result is a simple and secure arrangement which minimizes the risk of leakage of the heat exchange medium occurring.

Abstract: An apparatus and method for dehumidifying air includes a duct with at least four ports, two at each end. The ports are regulated by valves that are biased in the closed position. A desiccant containing matrix is disposed within the duct. One or more fans are adapted to produce substantially axial air flow in two directions through the duct: a first direction during a regeneration phase of the dehumidifying cycle and a second direction during a process phase of the dehumidifying cycle. In the process direction, air from the enclosure enters one end of the duct, passes through the desiccant containing matrix where moisture is absorbed by the matrix and exits through the opposite end of the duct back to the enclosure. The air is thus at a lower relative humidity when it leaves the apparatus.

Abstract: A tube and fin heat exchanger having two adjacent fluid circuits through which compressed air and a refrigerant fluid flow so as to be in heat exchange relationship with respect to one another. In one embodiment, the areas between the tubes and fins of the heat exchanger are filled with a mass of moist material which ices and operates to accumulate energy to thereby transfer the energy when the refrigerant fluid is not circulated.