Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
  • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
  • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
  • F28D1/06—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with the heat-exchange conduits forming part of, or being attached to, the tank containing the body of fluid
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
  • F28D7/1615—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium
  • F28D7/1623—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium with particular pattern of flow of the heat exchange media, e.g. change of flow direction

Definitions

• This invention relates to a heat exchanger and to an air climatiser that includes said exchanger.
• Heat exchangers are known, such as the type called radiators, in which the fluid to be cooled is passed through a plurality of low-flow conduits that are in contact with a current of air generated by a jet fan that projects the current onto the aforesaid conduits.
• the fluid conduits used in a radiator can be plates or pipes that usually have exterior fins or other elements for increasing the heat-dissipation surface area.
• Patent JP59142379 discloses a heat exchanger whose heat-exchange efficiency is increased by attaching to the exterior surface of the conduit that carries the fluid a thin plate bent into a star shape, leaving the front side and the rear part of said plate open.
• the heat exchangers described have the disadvantage of their heat-exchange efficiency being in practice very limited, making them useful only when the fluid-temperature jumps sought are small (as in the case of the heat exchangers used to cool fluids from engines and/or components that give off heat) .
• the objective of the present invention is to resolve the disadvantages mentioned above by developing a heat exchanger and a climatiser based on the aforesaid exchanger, which have very low energy consumption, are very simple and very highly effective.
• a heat exchanger in accordance with a first aspect of the present invention, includes at least a first conduit through which a fluid circulates, and means for generating a continuous flow of gas that exchanges said heat with said fluid, characterised in that it includes at least a second conduit through which said gas circulates, with said second conduit carrying inside it said the first conduit with fluid, and in that said means for generating the continuous flow of gas include an aspirator whose inlet is connected to said gas conduit, in such a way that said gas is drawn in and led through said second conduit from an inlet to an outlet.
• the heat exchanger of the present invention has a very high heat- exchange efficiency, basically due to the fact that the forced-impulsion piping of gas enables a very significant increase both of the time devoted to heat-exchange between the gas and the fluid as well as the gas pressure and contact surface area of said gas on the fluid conduits mounted inside the forced-impulsion piping.
• conduit is taken to mean a channel or tubular element that serves as a passageway or outlet for a fluid, gas or liquid.
• said channel or tubular element will have projecting elements
• fluid will be taken to mean a liquid or gas capable of exchanging heat with the gas that is circulating through the second set of pipes of the exchanger .
• Aspirator is taken to mean any machine or appliance that uses vacuum to draw out gases.
• the gas of the heat exchanger is air, since it is an easy and safe fluid to handle and, advantageously, said fluid is a liquid that circulates through the interior of said first conduit.
• the gas of the exchanger can, instead of air, be an inert gas with refrigerating power, such as nitrogen.
• the exchanger of the present invention uses air as a gas exchanger, it has the advantage of permitting the fluid in the first conduit to be heated or cooled and, at the same time, obtaining ducted cold or warm air that can be used for climatising premises.
• the equipment can thus find a dual use in industry or in households; as heat exchanger and as climatiser (heating/cooling) of premises.
• the liquid fluid of the exchanger is water, with said water being for industrial or domestic use. Water has the advantage of being an innocuous and easily obtained fluid.
• the exchanger includes a plurality of second interconnected conduits forming a circuit through which said gas circulates from an inlet to an outlet and a plurality of interconnected conduits through which the fluid circulates, said fluid conduits passing through the interior of said conduits with gas. Thanks to the presence of the aforesaid plurality of interconnected fluid conduits mounted inside the gas circuit, the contact or heat-exchange time between the gas and the fluid conduits can be enormously increased without the space occupied by the exchanger increasing significantly.
• said exchanger includes an enclosed chamber that has inside it a plurality of second interconnected conduits forming at least two of said gas circuits, independent of each other but mounted in a battery, with said enclosed chamber including at least one gas inlet that supplies the conduits of the two circuits and at least one gas outlet that connects the conduits of the two circuits with the inlet of the aspirator.
• the enclosed chamber facilitates the single- support installation of several independent conduit circuits that can share the same gas inlet and outlet and, therefore, a single aspirator. The flow of fluid that exchanges heat can thus be increased and, with it, the performance of the exchanger, without this involving higher energy consumption and costs or resulting in an exchanger or larger volume.
• the exchanger includes means for controlling the flow of gas that passes through said second conduit and/or means for controlling the flow of fluid that passes through said first conduit.
• the temperature of the gas or fluid to be cooled or heated can thus be modulated easily.
• the exchanger includes means for moistening the outer surface of said first conduit while said gas is being drawn in. This promotes an additional fluid-refrigerating effect produced by the evaporation that takes place on the surface of the conduit, so that the performance of the exchanger can be further enhanced.
• a climatiser that includes the claimed heat exchanger when using air as gas exchanger.
• climatiser is taken to mean an appliance that climatises, that is, an appliance that brings an enclosed space to the temperature, air humidity and sometimes also pressure conditions needed for the health or comfort of those occupying them.
• the climatiser of the present invention has the advantage over other climatisers of the state of the art that, by using the heat exchanger of the invention, it does not as of necessity require conventional refrigeration or heat pumps to cool or heat the air.
• the climatiser of the present invention can, for example, heat or cool air at a very low energy cost, using only the heat exchanger claimed above.
• the exchanger is used in an industry to cool a process fluid
• the high energy efficiency of the appliance enables channelled air to be obtained at a temperature close to that of the process fluid when it comes into the exchanger.
• warm air is obtained to climatise a premises at the plant itself.
• the industry may also have available at one of its plants a low-temperature fluid that may be very useful for cooling the air in some specific working zone in which much heat is generated (a cooking room, for example) .
• the fluid will be used in the exchanger of the present invention to cool the air in that room down to a temperature that will always be a little above that of the aforesaid fluid but that will in any case enable partial refrigeration to be provided.
• the fluid the climatiser uses is water that can be used both for cooling and heating air. That water can be of industrial origin, as noted above, or it can be household water from a well.
• the exchanger of the present invention uses well water that is usually at a temperature below ambient temperature, said exchanger will be able to produce refrigerated air for a dwelling, premises or office at a temperature close to that of the well water and, therefore, it can replace the conventional climatiser that uses a refrigeration pump.
• the climatiser of the present invention may, in addition to the exchanger, have to include means for heating or cooling the water that circulates through said exchanger.
• This option will be particularly useful where the climatiser is to be used in a dwelling, plant or offices to produce warm air or refrigerated air at a predetermined temperature.
• the water that is used will first have to be heated up to a preset value in order to produce the aforesaid warm or cold air.
• the energy necessary for heating or cooling the water of the exchanger will be from renewable sources, such as solar energy (solar/photovoltaic panels) , etc.
• the climatiser will thus permit climatisation of an enclosed space up to the desired temperature value, in a manner that fully respects the environment and using only water, air and energy from renewable sources.
• Figures Ia and Ib show two perspective views of a preferred embodiment of the heat exchanger in which the conduits are included in an enclosed chamber.
• Figure 2 shows a perspective view of the interior of the conduits included in the chamber of the exchanger of Figure 1.
• FIG 3 is a schematic view of the exchanger of Figure 1, showing the circuit of gas and fluid conduits.
• Figure 4 provides a schematic plan view of the conduits of the exchanger of Figure 1.
• Figures Ia and Ib show two perspective views of a preferred embodiment of the exchanger 1 of the present invention .
• the gas 2 and fluid 3 conduits have been included inside an enclosed chamber 4 whose outer casing 5 has two inlets 6a, 6b for air 2 and a tubed outlet 7 connected to an aspirator 8 that draws the air 2 from the aforesaid inlets 6 to the aforesaid outlet 7.
• the casing 5 of the chamber 4 also has an inlet 9 and outlet 10 provided for the fluid 3.
• Figure 2 shows a view of the interior of the chamber 4 without the outer casing 5, in which it can be observed that the fluid 3 flows through a plurality of vertical finned conduits 11 arranged in two rows, one upper and one lower, interconnected by means of collectors 12, which are also finned.
• the conduits 11 and collectors 12 of each row are integrated into supports 13 that allow circulation of the aspired gas 2 and, once covered with the outer casing, form the gas conduits 14 of the exchanger 1.
• the two rows of conduits 11 and their corresponding supports 13 are interconnected so as to form a circuit 15 of gas 2 and fluid 3 conduits from the inlet 6a to the outlet 7 connected to the aspirator 8.
• a second gas 3 inlet 6b has been provided that supplies the flow of the pipe 14 as it passes through the second row of fluid conduits 11. That second inlet 6b allows the heat-exchange performance to be optimised still further.
• Figure 4 shows a schematic plan view of the chamber 4 in which two independent circuits 15a, 15b of conduits 11, 14 for gas 2 and fluid 3 can be observed, arranged in a battery.
• the two circuits 15 share the same inlets 6a, 6b and outlet 7 for gas and, therefore, also the same aspirator 8.
• the flow of fluid 3 that exchanges heat can thus be increased and, therewith, the output of the exchanger, without this involving greater equipment energy consumption and cost.
• a balance pipe 16 is fitted inside the chamber 4.
• the hot water 3 could be residual water from industrial processes in which heat is generated, while in the case of a household it could be the water from the mains itself, which in the case of hot countries close to deserts habitually ranges between 4O 0 C and 6O 0 C, thereby making the sanitary use of such water 3 difficult and uncomfortable for purposes such as taking a bath, etc.
• the efficacy of the exchanger 1 of the present invention is surprisingly high, since it enables a large flow of water 3 cooled to 18 0 C to be obtained. Furthermore, this is achieved with a very simple design and very low energy consumption that allows savings of nearly 100% of the energy consumption of the conventional equipment that uses water refrigeration pumps.
• the exchanger provides air 2 at 5O 0 C that can be used to climatise an enclosed space.
• the equipment of the present invention can therefore have an exchanger 1 function and a climatiser 1 function . Accordingly, the hot water 3 generated in industry can be cooled without altering its composition in order to achieve values that allow it to be reused. That same industry could then take advantage of the warm air 2 obtained in order to climatise, for example, the offices zone. Similarly, in hot countries the water 3 from the mains can be cooled until it attains values that allow it to be used comfortably and without problems for sanitary purposes, while the warm air 2 that is generated can be put to other uses or expelled to the exterior.
• the exchanger 1 could be attached to a conventional refrigeration system. The user could thus benefit from the efficiency and energy saving of the equipment of the present invention.
• the exchanger 1 was used for cooling water 3 and heating air 2; as noted, however, said exchanger 1 could also be used for heating water 3 and cooling air 2.
• the user should have a supply of air 2, or any other gas, at a high preset temperature to supply the desired heat to said water 3.
• the energy required to heat said air or gas 2 could come from renewable sources.

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
• Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
• Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

Country Status (5)

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Family Cites Families (10)

• 2006
  • 2006-02-15 ES ES200600390A patent/ES2284375B1/es not_active Expired - Lifetime
• 2007
  • 2007-02-13 DE DE602007005230T patent/DE602007005230D1/de active Active
  • 2007-02-13 WO PCT/EP2007/051383 patent/WO2007093590A1/en not_active Ceased
  • 2007-02-13 EP EP07704555A patent/EP1989498B1/de not_active Not-in-force
  • 2007-02-13 AT AT07704555T patent/ATE460631T1/de not_active IP Right Cessation

Non-Patent Citations (1)

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