Abstract: This disclosure relates to an aircooled heat exchanger including first and second sets of tubes that carry a fluid to be cooled. One end of each tube is connected to an inlet header and the other end is connected to an outlet header. Each tube includes first and second longitudinal portions which are joined or connected by an intermediate bent portion. The tubes are arranged in the flow path of a cooling air flow. The first portions of the first set of tubes are located upstream, with respect to the direction of air flow, relative to the second portions of the first set and relative to the first portions of the second set, and the second portions of the second set are located upstream relative to the first portions of the second set and to the second portions of the first set. This offset relation of portions of the tubes substantially equalizes the heat exchange with the air.

Abstract: In an air-cooled steam condenser (2, 2'), each tube of a bundle (8, 8') of finned heat exchange tubes, arranged parallel to each other and horizontally, and connecting a steam dispensing manifold (4, 4') to an outlet manifold (5, 5'), is in the form of a coil including three finned elements (12, 13, 14) which are arranged horizontally and parallel to each other in consecutive rows relative to the direction of the cooling air flow (11, 11'), and which are connected together by two elbow fittings (15, 16) positioned at an angle with a positive slope so as to facilitate the drainage of the condensate.

Abstract: The invention is applicable to heat exchangers, eg. the radiator of a water-cooled internal combustion engine in a motor vehicle. Said radiator is of the type having a bundle of tubes with a water box fixed to each end thereof. One of the water boxes (20) has a passage (36) for degassing the cooling liquid. The passage comprises an internal partition (40) in the water box (20) and a conduit (50) leading to an expansion chamber (26). The water box (20), the passage partition (40) and the conduit (50) are all parts of the same single piece moulding. The expansion chamber (26) is advantageously part of the same moulding also. Effective degassing is thus provided without there being any need to add a specific degassing tube to the water box. Cost is thus reduced.

Abstract: In order to prevent collapse and stress cracking of heat transfer devices, such as those devices utilized in solar energy systems, a container, particularly one made of plastic, is partially filled with a solid or liquid heat transfer medium which evaporates and condenses over the working temperature range of the device, in an amount sufficient to leave a void space in the device at the highest temperature to which the device is subjected, an inert, solidifiable or liquifiable pressurizing material, such as solid carbon dioxide, which undergoes phase transition to a gaseous state at a temperature at least as high as the lowest temperature to which the device is subjected, in an amount sufficient to create a positive pressure within the void space at the lowest temperature to which the device is subjected, is added and the container is sealed to produce a gas and vapor impervious device. A heat transfer device manufactured in this manner is also disclosed.

Abstract: In a heater core comprising space first and second water tanks, parallel tubes interposed between the tanks to provide a fluid communication therebetween, heat radiation fins each being disposed between the mutually neighboring two tubes and a water outlet tube connected to the first water tank for discharging water from the heater core, there is provided an air escaping tube which has one end located at a predetermined portion of the first water tank and the other end located in the water outlet tube. The predetermined portion of the first water tank is a portion where a so-called air pocket tends to appear under practical operation of the heater core.

Abstract: The expansion chamber (25) and the water box (24) are interconnected by a degassing passage or duct (28) and by a suction orifice (29). The expansion chamber also has a bottom end which is connected (via 27) to a suction inlet (21) of a pump (11) for circulating liquid in said cooling circuit. One way valve means (40) are provided to close said suction orifice to prevent liquid in the water box from flowing into the expansion chamber and to open said orifice to enable liquid to flow in the opposite direction. The invention is particularly applicable to degassing the cooling liquid while a diesel engine is warming up from a cold start.

Abstract: This disclosure relates to an aircooled heat exchanger including first and second sets of tubes that carry a fluid to be cooled. One end of each tube is connected to an inlet header and the other end is connected to an outlet header. Each tube includes first and second longitudinal portions which are joined or connected by an intermediate bent portion. The tubes are arranged in the flow path of a cooling air flow. The first portions of the first set of tubes are located upstream, with respect to the direction of air flow, relative to the second portions of the first set and relative to the first portions of the second set, and the second portions of the second set are located upstream relative to the first portions of the second set and to the second portions of the first set. This offset relation of portions of the tubes substantially equalizes the heat exchange with the air.

Abstract: In abstract, a preferred embodiment of this invention is a heat storage tank particularly adapted for use in conjunction with solar energy systems. The tank is insulated about its entire exterior with control means being mounted in a special compartment within the tank. The heat generated by the controls is thus put to useful purposes rather than being dissipated into the ambient air. Also, a unique venting system is provided so that atmospheric pressure can be maintained within the tank without loss of the fluid therein due to evaporation.

Abstract: A heatpipe with a hermetically-sealed residual gas collector vessel which stands in communication with the upper end of the heatpipe. The heatpipe is characterized in that the collector vessel is arranged within the heatpipe adjacent to the vaporization end thereof in such a manner that the fluid which is to be vaporized reaches the vaporization end without hindrance, and wherein the collector vessel stands in communication with the condensation end through an open-ended narrow gas conducting tube which terminates there, and whose other end leads to the condensate collecting point in the collector vessel.

Abstract: A heat exchanger used in the multi-stage flash distillation process is provided at the cool end with a gas injection device that creates two-phase flow within the tube side of the heat exchanger. At the hot end, the two-phase flow is degasified and the gas recycled through the cool end. Alternatively, where multiple heat exchanger modules are used, the two-phase flow from each tube in the first exchanger is directly routed to a tube of the second exchanger, or the two-phase flow from the first exchanger is separated and the individual phases are recombined in the entrance of the second exchanger. A gas injection device is used for creation of the two-phase flow, and this employs a gas chamber with gas supply tubes running into the liquid inlet ends of the heat exchanger tubes to introduce the gas uniformly into each tube.

Abstract: An automotive vehicle cooling system having a radiator connected to the engine coolant jacket for circulation of coolant, a pump delivering coolant from the radiator to the engine, a non-pressurized reservoir bottle communicating with the radiator and having a make-up line communicating with a venturi in a recirculating line around the pump directing coolant from the pump outlet to the pump inlet. The venturi allows make-up coolant to be added from the reservoir bottle at atmospheric pressure so that the bottle can be of a relatively lightweight gauge material.

Abstract: A pipe connecting the equipment to be protected with a vessel is locally divided in two paths, a pump and a one-way valve being mounted in one path and an electro-magnetic valve in the other path. Pump and electric valve are controlled by a contact manometer so to fill or to empty the vessel depending on the pressure in the equipment.The liquid body in the vessel moves a diaphragm between a position above the pipe connection but below a discharge opening and a position above this opening, in which latter position liquid is discharged through a siphon provided on the opening.The diaphragm divides the vessel in two spaces and is the bottom of a bag secured to the vessel.A float in a container connected to the vessel opens a feeding valve when the liquid level in this vessel is beneath a determined value.

Abstract: A yarn heating device for closed or open oven use has a plurality of elongate chambers for heating fluid. These are connected at one end to a reservoir for heating fluid having a horizontal connecting pipeline and one or more vertical pipes below it, these pipes having heating means. The chambers are connected at their other ends to a common collector by respective vertical pipelines which have separators near the collector, the separators having small orifices.

Abstract: A leakage measuring apparatus and method is herein provided for a gas-cooled, liquid-cooled dynamoelectric machine's cooling system. The apparatus comprises: a liquid coolant reservoir; an integrating vessel; a flow restriction means such as an orifice, orifice covered by a porous membrane, or a needle valve; a pressure relief valve which is hydraulically connected between the liquid coolant reservoir and the integrating vessel; and means for gaging the pressure within the integrating vessel, said pressure indicative of the amount of leakage within the cooling system. The effect obtained by the gaging of the pressure in the integrating vessel is: (1) the integration of the pressure surges resulting from the intermittent activation of the pressure relief valve; and (2) the amplification, for gaging purposes, of the pressure changes in the reservoir, these changes caused by the existence of leakage.

Abstract: A negative pressure cooling system for cooling passageways in plastic molds includes a closed reservoir that is maintained under a high vacuum by a vacuum fluid pump with the outlet of the cooling passageway being connected to the reservoir inlet and with the reservoir outlet being connected to the cooling passageway inlet through a pressure pump and a fluid pressure regulator.

Abstract: (a) A cooling installation working through a change in Phase.(b) An installation wherein the chamber is connected to an expansion vessel through a valve calibrated at a determined opening pressure depending on the nature of the heat-carrier fluid and on the maximal temperature desired within the chamber and/or on the element to be cooled, said expansion vessel carrying a means for draining off the contents of the expansion vessel.

Abstract: The header delimits a bearing portion 14 against which abuts a partition connected to the inner wall of the header by a gasket 17. A pipe for supplying the liquid to be cooled arrives beneath the partition 8 and a degassing duct 24 arrives above the partition in a compartment closed by a stopper.

Abstract: A feed-water preheater for a steam power plant is disclosed. Feed-water at a relatively low temperature is conducted through bundles of heater tubes in heat exchange relation with steam from the turbine. The heater tubes are arranged in a U-shaped bundle, with one leg of the U serving as the cold inlet side and the other leg of the U serving as the warm outlet side of the heat exchanger. A partition extends lengthwise of the heater tubes between the legs and the U-shaped bundle. The steam inlet is located at the warm outlet side of the tubes and the housing forms a steam chest around the tubes. Deaerating pipes are provided on each side of the partition in the center of the bundle of heater tubes with openings spaced along the length of the deaerating pipes for receiving the noncondensable gases from the steam, and to draw off the gases through the deaerating pipes.

Abstract: A heat exchanger is provided for a pressurized, closed cooling system for a marine propulsion engine. The heat exchanger includes a closed spiral passageway means for the fresh cooling water drawn from the lake or other water body. An outer housing encloses the spiral passageway and includes baffle means for directing of a coolant in a spiral path over the cooling passageway means within the housing. The coolant is thereby cooled by the circulating cold fresh water. An air discharge passageway means is provided in the center of the spiral path. The centrifugal forces associated with the spiral flow of the cooling coolant results in the water moving outwardly within the passageway while the air tends to collect within the center thereof where it is collected and discharged by the air passageway means for automatic separation and removal of the air.

Abstract: An apparatus for removing non-condensable gas accumulated in the exchanger tubes of a heat exchanger. A vertically elongated tank having retained in its lower portion a liquefied working medium for the exchanger tubes is provided beside the heat exchanger. The tank communicates as its lower portion with the lower ends of the tubes and at its upper portion with the upper ends of the tubes by lines each provided with a valve. A gas release pipe extends downward from outside into the upper portion of the tank through the tank wall. A working medium condensing cooling tube is provided in the upper portion of the tank. The interior of the tank is partitioned into a condensing tank and a tank main body positioned therebelow and having an upper portion communicating with the upper portion of the condensing tank and a lower portion communicating with the lower portion of the condensing tank.

Abstract: A heat exchange system in which sensible and/or latent heat is exchanged between a stream of incoming air into an enclosure and a stream of air leaving the enclosure, comprising a heat exchanger for the incoming air and a heat exchanger for the leaving air, each of said exchangers comprising a group of passages through which the incoming air stream and the leaving air stream, respectively, flow in heat exchange relationship with a liquid passing through a separate group of passages. The liquid is circulated in a closed circuit between the two exchangers in a duct leading from the heat exchanger for the incoming air to the heat exchanger for the leaving air, and, upon heat exchange with the leaving air, recirculated in a separate duct to the heat exchanger for the incoming air.

Abstract: An engine cooling system for the internal combustion engine of a motor vehicle, such as a construction machine or the like which operates on uneven or sloped terrain, comprises a radiator having a lower core section and an elongated upper section or top tank separated from the core section by a sealed baffle and extending transversely to the longitudinal axis of the vehicle. The cooling system further comprises fluid conducting passages connected between the radiator and the engine, including a radiator supply line and a radiator return line connected between the core section and the engine. The cooling system also comprises a pair of fluid outlet ports located near the bottom of the top tank and spaced apart from each other in a direction transverse to the longitudinal axis of the vehicle.