KR20090048480A - heat transmitter - Google Patents

Abstract

The present invention is a heat exchanger comprising a plurality of tubular elements or cores (1, 101), each of which comprises a support cylinder or a half cylinder (2, 102) and at least one curved heat exchanger plate (3, 3 _c , 3). _f , 103, and outer retaining tubes or half tubes 6, 106, each plate separating a first cavity from a second cavity, the first cavity containing liquid 4, 104. And the second cavity contains a coolant 5, 5 _c , 5 _f , 105 that causes thermal expansion or contraction of the plate, thereby causing compression or expansion of the liquid in the first cavity, respectively.

Tubular element, support cylinder, heat exchange plate, outer retaining tube, cavity

Description

Heat exchanger {HEAT EXCHANGER}

The invention relates in particular to heat exchangers used to produce liquid under pressure by expanding in a pump.

Hydraulic pumps and hydraulic systems incorporating such pumps are known from the prior art, in particular from patent applications FR-A-2 851 and WO-A-2004 / 079194.

The hydraulic system comprises at least one pumping piston and a drive piston consisting of two stages of the same differential piston. The pumping piston delimits the pimping chamber inside the pimping cylinder and the drive piston delimits the driving chamber inside the drive cylinder. The pumping piston and the drive piston are connected by the movement connecting means in such a way that the increase in the volume of the drive chamber corresponds to the decrease in the volume of the pumping chamber and vice versa.

The pumping chamber is hydraulically connected to the hydraulic fluid reservoir of the system, which is powered by the hydraulic pump.

The drive chamber of the pump is hydraulically connected to the tubular heat exchange bundle. Liquids with high coefficient of thermal expansion are present in the drive chamber and the tubular heat exchange bundle. Such liquids having a high coefficient of thermal expansion are alternately arranged in a heat exchange relationship with heat and cold sources.

Thus, liquids with high coefficients of thermal expansion receive alternating thermal expansion and thermal contraction, which in turn increase the volume of the drive chamber, while reducing the volume of the pumping chamber, thereby hydraulically feeding the hydraulic motor and then into the reservoir of the system. Pressurize the fluid or reduce the volume of the drive chamber, causing suction of hydraulic fluid from the reservoir of the system. The pumping effect is thus achieved by alternating hydraulic fluid discharge and suction movement.

The tubular heat exchange bundle is constituted by vertical tubes that are closed at the bottom and communicate with each other at the top through a collector that opens a conduit connected to the drive chamber.

The tubular heat exchange bundle is located inside the enclosure divided by the horizontal compartments. These thermally insulating compartments are perforated to allow each tube to pass through the compartment from one side to the other, while maintaining as good an impermeability as possible between the compartment and the tube.

 The enclosure is thus divided into a lower chamber containing a circulating low temperature coolant and an upper chamber containing a circulating high temperature coolant.

The tubular heat exchange bundles are thus arranged in alternating heat exchange with the low temperature coolant and the high temperature coolant by vertical movement inside the enclosure. This vertical movement is generated by jackscrews.

Alternating thermal expansion and contraction received by fluids with high coefficient of thermal expansion results in alternating expansion and contraction of the tubular heat exchange bundles, which is easy to stretch each tube and finally causes fatigue of the tubes that make up the tubular bundle. .

Accordingly, it is an object of the present invention to propose a heat exchanger which makes it possible to withstand high mechanical stress for a long time.

This object is a heat exchanger comprising a plurality of tubular elements or cores, each comprising a support cylinder or a half cylinder, at least one curved heat exchanger plate, an outer retaining tube or a half tube, and each plate being A coolant that separates the first cavity from the second cavity, wherein the first cavity receives liquid and the second cavity causes thermal expansion or contraction of the plate to cause compression or expansion of the liquid in the first cavity, respectively Achieved by a heat exchanger.

According to another feature, the liquid 4 has a high coefficient of thermal expansion.

According to another feature, the outer retaining tube or half tube, the heat exchange plate or plates, and the support cylinder or half cylinder have a decreasing diameter.

According to another feature, the first cavity and the second cavity are delimited by heat exchange plates on one side, delimited by a support cylinder or half cylinder or an outer retaining tube or half tube on the other side, (S), the support cylinder or the half cylinder, and the outer retaining tube or the half tube are concentric.

According to another feature, each tubular element is closed at each end by a flange, one of the flanges is configured to allow circulation of liquid through the flange and the other flange is configured to prevent this circulation.

According to another feature, each tubular element is closed at each end by a flange, and at least one of the flanges is configured to allow circulation of coolant or coolants through the flange.

According to another feature, the flange is configured to allow alternating circulation of the coolant heated by the heat source and the coolant cooled by the cold source.

According to another feature, one of the heat exchange plates is provided with a plurality of first fins in contact with the liquid.

According to another feature, one of the heat exchange plates is provided with a plurality of first fins in contact with the coolant.

According to another feature, one of the heat exchange plates is provided with a plurality of second fins in contact with the coolant.

According to another feature, the various tubular elements are parallel to each other.

According to another feature, the various tubular elements are held together by the straps, each strap being attached to a threaded rod clamping the tubular elements and positioned between at least two tubular elements.

According to another feature, the various tubular elements are held together by the straps, each strap clamping the tubular elements and being welded to each other.

According to another feature, the various tubular elements are held together by the straps, each strap clamping the tubular elements and soldering to each other.

According to another feature, each tubular element or core also includes a coolant conduit and a spray nozzle for injecting said coolant from said coolant conduit onto a heat exchanger plate.

The invention also provides a pumping piston for activating the control means through the movement of a fluid, a drive piston connected to the pumping piston by means of motion and configured to be activated by the movement of the liquid in the heat exchanger described above, a heat source and a cold source. It relates to a pump containing.

According to another feature, the pump also comprises a coolant heated under pressure by the heat source to the tubular element or core of the heat exchanger and a bypass configured to supply the coolant cooled at atmospheric pressure by the cold source.

The invention also relates to a system comprising the pump as described above, a fluid reservoir and control means.

Other features and advantages of the present invention will become apparent by reading the following detailed description of embodiments of the invention given by way of example only with reference to the drawings.

1 is a perspective view of a tubular element of a heat exchanger according to a first embodiment of the invention.

2 is a cross-sectional view of a heat exchanger according to a second embodiment of the present invention.

3 is a longitudinal sectional view of a heat exchanger according to a third embodiment of the present invention.

4 is a cross-sectional view of a heat exchanger according to a fourth embodiment of the present invention.

Like reference symbols in the various drawings indicate like or equivalent elements.

The heat exchanger according to the invention comprises a plurality of tubular elements. Each tubular element includes a support cylinder, at least one curved heat exchanger plate that separates the first cavity from the second cavity, and an outer retaining tube. The first cavity contains liquid and the second cavity contains a coolant that causes thermal expansion or contraction of the plate, thereby causing compression or expansion of the liquid in the first cavity.

The heat exchanger plate expands or contracts through contact with the coolant as a function of the temperature of the coolant or coolants circulating through the heat exchanger, causing compression or expansion of the liquid contained in the first cavity and the first cavity.

The support cylinders and outer retaining tubes, made of a material that can be high pressure resistance and poor thermal conductors, significantly limit the longitudinal expansion of the heat exchanger, making it possible to withstand higher mechanical stresses longer than tubular heat exchange bundles known in the art. .

1 shows a perspective view of a tubular element of a heat exchanger according to a first embodiment of the invention.

The heat exchanger includes a plurality of tubular elements.

In the first embodiment of the present invention, each tubular element 1 comprises an outer retaining tube 6 containing two heat exchange plates 3 _c , 3 _f , respectively called an outer plate and an inner plate. It receives the support cylinder 2 by itself. In this embodiment, the heat exchange plates 3 _c , 3 _f are cylindrical. Also contemplated are embodiments having one or more heat exchange plates that are curved but not cylindrical, or form only part of a cylinder. The support cylinder 2 is a solid cylinder, for example. The outer holding tube 6, the two heat exchange plates 3 _c , 3 _f and the support cylinder 2 are substantially concentric.

The first cavity formed between the two heat exchange plates 3 _c , 3 _f receives the liquid 4. Preferably, the liquid 4 has a high coefficient of thermal expansion. The heat exchanger plate allows for heat exchange between the coolant and the liquid 4. Thus, the liquid 4 expands or contracts as a function of the temperature of the coolant or coolants circulating through the heat exchanger, which causes thermal expansion or contraction of the liquid 4. The resulting compression or expansion is greater when the liquid does not have a high coefficient of thermal expansion and when the compression or expansion of the liquid 4 is only due to the thermal expansion or contraction of the heat exchange plate.

Two other cavities, each formed between one of the plates 3 _c and the outer retaining tube 6 and between the other plate 3 _f and the support cylinder 2, are liquid hot coolant 5 _c and cold Each coolant 5 _f is received.

One of the objects of the heat exchanger according to the invention is to compress or expand the liquid 4 by heat exchange between the plate and the coolant 5 _c , 5 _f , with the liquid remaining constant in the liquid state. In order to optimize this heat exchange, in particular in terms of duration, these plates 3 _c , 3 _f are made of very good thermally conductive material, i.e. metal. This allows good heat exchange with the liquid 4, which is particularly important when the liquid 4 has a high coefficient of thermal expansion. In order for the heat exchanger to be more resistant to fatigue, the outer retaining tube 6 and the support cylinder 2 are made of a high pressure resistant material. Thus, to give a non-limiting example, they are made of carbon composite or filament winding material or glass. These materials also provide the advantage of having poor thermal conductivity (eg between 0.034 W / mK and 0.0454 W / mK), making it possible to significantly limit the heat loss to the outside of the heat exchanger. When not using a liquid having a high coefficient of thermal expansion, heat loss can be limited by the use of a liquid having poor thermal conductivity. In particular, high pressure is applied to the heat exchanger plate in contact with the high temperature coolant 5 _c . Depending on the properties of the metal constituting the plate as a function of use and the size of the heat exchanger, such plates usually have a thin thickness of several millimeters to several tens of millimeters. Thus, in contrast to the basically longitudinal direction in the prior art, since the pressure on the plate is applied radially (and preferably toward the inside of the tubular element) during the expansion, it is not necessary to weaken the plate, The speed is increased.

Thus, unlike tubular heat exchange bundles known from the prior art, the heat exchanger according to the invention makes it possible to use large diameter heat exchange plates for the same thickness, which is more resistant to high pressure, which makes it possible to broaden the application. Make it. Since the pressure is applied from the outside inward and not from the inside out, or the resistance of the plate to mechanical stress is facilitated by the outer holding tube 6 or the support cylinder 2 made of high pressure resistant material. Because of this, the diameter of the outer plate can be increased to a constant thickness. If the outer retaining tube 6 or the support cylinder is metal, it is necessary to protect them from heat in order to prevent them from expanding, which reduces the efficiency of the system. Therefore, it is conceivable to cool the outside of the holding tube with the fluid 5 _f .

In another embodiment, the outer retaining tube 6 and the support cylinder 2 are both made of metal, but the tubular elements are welded at each end to ensure that these two elements 2 and 6 withstand high pressure. Or a flange to be solder bonded.

Preferably, the high temperature coolant 5 _c is received between the outer holding tube 96 and the outer heat exchanger plate 3 _c , while the low temperature coolant 5 _f is the inner heat exchanger plate 3 _f and the support cylinder 2. Is accommodated in between.

Thus, when the heat exchange plate 3 _c is expanded, the heat exchange plate 3 _f is subjected to radial compressive stress. The presence of the support cylinder 2 makes it possible to help the internal heat exchange plate 3 _f withstand this compressive stress, which is applied to the tubular element radially in the direction of the support cylinder 2.

The internal heat exchange plate 3 _f also includes a plurality of first longitudinal fins 31 located inside the cavity containing the low temperature coolant 5 _f . These first fins 31 make it possible to more easily withstand the radial compressive stresses exerted on the tubular element as a result of the expansion of the outer heat exchanger plate 3 _c . The first pin 31 also serves to position the support cylinder 2 substantially in the center of the inner plate 3 _f .

The outer heat exchanger plate 3 _c also includes a plurality of second longitudinal fins 32 located inside the cavity containing the hot coolant 5 _c . These second fins 32 serve in particular to position the outer plate 3 _c substantially in the center of the retaining tube 6.

Consider an example in which the plates 3 _c , 3 _f are made of steel, the plate 3 _c is for example 3 mm thick and the plate 3 _f is 1 mm thick. The plate 3 _c can then carry a pressure of 400 bar with the outer holding tube 6. The plate 3 _f can bear the same pressure as the plate 3 _c because the pressure is applied inward from the outside, despite the thin thickness.

Cylindrical heat exchange plates (3 _f) is the low-temperature refrigerant that comes from naengwon (5 _f) and in contact with air and alternating time the flow of low-temperature coolant (5 _f) stop.

2 shows a cross-sectional view of a heat exchanger according to a second embodiment of the present invention.

In this second embodiment, the heat exchanger comprises a plurality of tubular elements 1. Each tubular element 1 comprises an outer retaining tube 6 which houses a single heat exchange plate 3 which itself receives a support cylinder 2. Also in this embodiment, the heat exchange plate 3 is cylindrical without limitation. The support cylinder 2 is a solid cylinder, for example. The outer retaining tube 6, the heat exchange plate 3 and the support cylinder 2 are substantially concentric.

A first cavity is formed between the heat exchange plate 3 and the outer holding tube 6, and a second cavity is formed between the heat exchange plate 3 and the support cylinder 2. One of these cavities contains the liquid 4, while the other cavity contains the coolant 5. The liquid 4 has a high coefficient of thermal expansion, for example. Thus, this allows for greater compression of the liquid compared to expansion of the plate alone as described above.

As mentioned above, the heat exchange plate 3 is made of a very good thermally conductive material, ie metal, in order to optimize heat exchange.

In addition, as described above, the outer retaining tube 6 and the support cylinder 2 are made of a high pressure resistant material with poor thermal conductivity, such as for example a composite carbon or filament winding material or glass.

In this embodiment, the hot and cold coolant 5 are alternately injected into the cavity provided to receive the fluid.

Preferably, the liquid 4 is accommodated between the outer holding tube 6 and the heat exchanger plate 3, while the coolant 5 is received between the heat exchanger plate 3 and the support cylinder 2.

Thus, when the heat exchanger plate is expanded, it will be subjected to radial compressive stress. The presence of the support cylinder 2 makes it possible to help the heat exchange plate 3 to withstand this compressive stress exerted in a plane transverse to the tubular element in the direction of the support cylinder 2.

The heat exchange plate 3 also comprises a plurality of longitudinal fins 31 located inside the cavity containing the liquid 4. These fins 31 can be made to increase the heat exchange surface.

The heat exchange plate 3 also includes a plurality of second longitudinal fins 32 located inside the cavity containing the coolant 5. These second pins 32 substantially position the support cylinder 2 in the center of the plate 3 and may result from the compressive stress applied laterally to the tubular element as a result of the expansion of the plate 3. To make it easier to withstand significant deformation.

As shown in Fig. 2, the tubular elements are substantially parallel and preferably perpendicular to each other. They are preferably arranged so as to contact each other such that their axes form a tetrahedron, in order to limit energy losses. This arrangement of the tubular elements and the manner in which they are attached as described below can be applied to the tubular elements 1 according to the first and third embodiments of the invention.

Each tubular element 1 is clamped by a strap, not shown, which is attached to a threaded rod 7 located in the center of the trihedron.

To make the heat exchanger more durable, the array of tubular elements 1 is held together by a synthetic resin.

In another embodiment, the straps are welded or soldered together.

In addition, each tubular element 1 is closed by a flange, not shown, at each end. One of the flanges needs to allow liquid 4 to circulate through the flange. In particular, the flanges configured to circulate the liquid 4 must all be arranged on the same side of the various tubular elements that constitute the heat exchanger.

On the other hand, it is possible for one or both of the two flanges to allow the coolant 5 to circulate through this or these flange (s).

3 is a longitudinal sectional view of a heat exchanger according to a third embodiment of the present invention.

In a third embodiment, the heat exchanger comprises a plurality of tubular elements 1. Each tubular element 1 comprises an outer retaining tube 6 which houses a single heat exchange plate 3 which itself receives a support cylinder 2. Also in the third embodiment, the heat exchange plate 3 is vertical and, without limitation, cylindrical. The support cylinder 2 is a solid cylinder, for example. The outer retaining tube 6, the heat exchange plate 3 and the support cylinder 2 are substantially concentric.

A first cavity is formed between the heat exchange plate 3 and the outer holding tube 6, and a second cavity is formed between the heat exchange plate 3 and the support cylinder 2. One of these cavities contains the liquid 4, while the other cavity contains the coolant 5. The liquid 4 has a high coefficient of thermal expansion, for example. Thus, as described above, this allows for greater compression of the liquid compared to expansion of the heat exchanger plate alone.

As mentioned above, the heat exchange plate 3 is made of a very good thermally conductive material, ie metal, in order to optimize heat exchange.

Preferably, the liquid 4 is accommodated between the outer holding tube 6 and the heat exchanger plate 3, while the coolant 5 is received between the heat exchanger plate 3 and the support cylinder 2.

Therefore, when the heat exchange plate 3 is expanded, it will be subjected to radial compressive stress. The presence of the support cylinder 2 makes it possible to help the heat exchange plate 3 to withstand this compressive stress exerted in a plane transverse to the tubular element in the direction of the support cylinder 2.

The heat exchanger also includes two conduits between the cavity containing the coolant 5 and the support cylinder 2, which supply hot or cold coolant from the heat or cold source to the heat exchanger. These conduits are thermally insulated from each other by the first separator 10 and thermally insulated from the cavity containing the coolant by the second separator. To avoid heat loss, the separator is made of a very low thermally conductive material.

The spray nozzles 12, 13 are cavities initially filled with air and intended to receive the hot or cold coolant 5, through the capillaries running from the conduits 8, 9 through the separators 10, 11. Or make it possible to spray low temperature coolant. These capillaries can, at atmospheric pressure, when they are liquid, precisely stop the coolant at the outlet port and reduce the time it takes for the coolant to go from the control valve to the heat exchange plate 3. This spraying is substantially radial and allows for quick and complete spraying of the heat exchanger plate 3.

4 is a sectional view of a heat exchanger according to a fourth embodiment of the present invention.

In a fourth embodiment, the heat exchanger includes a plurality of cores 101.

Each core 101 includes two elements 107 symmetric to each other. The two elements 107 are opaquely coupled to each other at the joint 100. Each core 101 includes two retention half tubes 106 oriented with the concave side facing out of the core. Thus, the two half tubes 106 have a back portion with respect to each other. Each retaining half tube 106 itself receives a heat exchange plate 103 containing a supporting half cylinder 102. In this embodiment, the heat exchange plate 103 is semicylindrical. The heat exchange plate 103 is inserted to seat against the shoulder 114 inside the retaining half tube 106 and is held against this shoulder by a retaining means, for example a weld.

The first cavity is formed between the heat exchange plate 103 and the holding half tube, and the second cavity is formed between the heat exchange plate 103 and the support half cylinder 102. One of the cavities contains the liquid 104, while the other contains the coolant 105. The liquid 4 has a high coefficient of thermal expansion, for example. Thus, as described above, it allows for greater compression of the liquid compared to expansion of the heat exchanger plate alone.

As mentioned above, the heat exchanger plate is made of very good thermally conductive material, i.e. metal, in order to optimize heat exchange.

Preferably, the liquid 104 is received between the retaining half tube and the heat exchange plate 103, while the coolant 105 is injected into the heat exchange plate 103 by an injector housed in the support half cylinder 102.

Thus, when the heat exchange plate 103 is expanded, it will be subjected to radial compressive stress.

In addition to the shape of the heat exchange plate 103, the presence of the support cylinder 2 allows the heat exchange plate 103 to withstand this compressive stress exerted in a plane transversely with respect to the tubular element in the direction of the support half cylinder 102. Makes it possible to help.

The injection device of each supporting half cylinder 102 includes two conduits 108 and 109 for supplying a hot or cold coolant from a heat or cold source to the heat exchanger. These conduits are thermally insulated from each other and from the cavity containing the coolant. Injection nozzles 112, 113 make it possible to inject hot or cold coolant from conduits 108, 109 to heat exchange plate 103. Injection is substantially radial and allows for quick and complete injection of the heat exchange plate 103.

It is possible to make the periphery of the heat exchanger plate not circular or cylindrical. The leaf shape or arch shape suggesting a grooved cake mold makes it possible to benefit from the increased length of the periphery, contributing to the larger linear expansion of the heat exchanger plate and the compressive displacement of the liquid located inside the cavity 104.

In the fourth embodiment of the invention described above, the coolants 5, 5 _c , 5 _f are for example water and the liquid 4 is for example ethanol. The coefficient of thermal expansion of ethanol is 1.1 · 10 ⁻³ K ⁻¹ .

The high temperature coolant 5 _c is heated by a cold source [sic] and the low temperature coolant 5 _f is cooled by a cold source.

The heat source is for example a solar panel. In this case, the flow of energy generated by the heat source is low, and it is especially important to minimize the heat loss in order to conserve the available energy.

The heat exchanger according to the invention comprises a pumping piston configured to activate the control means through the movement of a fluid (hydraulic liquid or gas), connected to the pumping piston by means of motion and described above by means of a heat source and by a cold source [sic]. It is intended to be installed in a pump, which also includes a drive piston configured to be activated by the movement of the liquid 4 coming from the heat exchanger.

The pump accommodates several heat exchangers, for example.

The pump is capable of alternatingly supplying the hot coolant heated by the heat source and the cold coolant cooled by the cold source to the tubular element 1 of the heat exchanger for operation and also to produce alternating thermal expansion and contraction. It makes it possible to start the drive piston, including a bypass which makes it possible.

The pump according to the invention is also intended to be installed in a system comprising control means, for example a motor and a fluid reservoir.

The system is for example an air conditioner. In this case, the pumping chamber sucks gas in and compresses it and serves as a compressor. The heat source is for example one or more solar panel (s) or isothermal tanks for storing high temperature coolant, which can be used at night. Cold sources are, for example, ponds or swimming pools.

In a variant, the system is a hydraulic system that produces household electricity. In this case, the control means is a hydraulic motor. The heat source is an isothermal tank for storing one or more solar panel (s) and / or coolant, which can be used at night. Cold sources are, for example, tanks, ponds or swimming pools.

In a variant, the system is a hydraulic system that produces household electricity from geothermal energy. In this case, the hydraulic pump operates a hydraulic motor that drives the generator. The heat source in this case is constituted by hot water generated by geothermal energy, and the cold source is constituted by, for example, a natural environment, that is, a fountain, a river and the sea.

When the system includes a heat source comprised by a solar panel, the prevailing pressure of the hot coolant circuit must be relatively high to maintain the coolant (eg water) in the liquid state. Otherwise, water evaporates. On the other hand, the prevailing pressure of the low temperature coolant circuit may be ambient pressure. In this case, therefore, the use of a heat exchanger having a tubular element according to the first embodiment described above is suitable.

Claims (18)

A heat exchanger comprising a plurality of tubular elements or cores 1, 101, each of Support cylinder or half cylinder (2, 102), At least one curved heat exchanger plate 3, 3 _c , 3 _f , 103, An outer retaining tube or half tube 6, 106, Each plate separates the first cavity from the second cavity, the first cavity contains liquids 4, 104 and the second cavity causes thermal expansion or contraction of the plate, respectively within the first cavity. A heat exchanger containing a coolant (5, 5 _c , 5 _f , 105) which causes compression or expansion of the liquid. 2. Heat exchanger according to claim 1, characterized in that the liquid (4) has a high coefficient of thermal expansion. 3. An outer retaining tube or half tube (6, 106), a heat exchange plate or plates (3, 3 _c , 3 _f , 103) and a support cylinder or half cylinder (2, 102) according to claim 1 or 2. Heat exchanger, characterized in that it has a reduced diameter. The method according to claim 1, wherein the first cavity and the second cavity are bounded by heat exchange plates 3, 3 _c , 3 _f , 103 on one side and the other side. On top is bounded by support cylinders or half cylinders 2, 102 or outer retaining tubes or half tubes 6, 106, the heat exchange plate (s) 3, 3 _c , 3 _f , 103 and support cylinders Or the half cylinder (2, 102) and the outer retaining tube or half tube (6, 106) are concentric. 5. The tubular element (1) according to any one of the preceding claims, wherein each tubular element (1) is closed at each end by a flange, one of the flanges allowing circulation of the liquid (4) through the flange And the other flange prevents this circulation. 6. The tubular element (1) according to any one of the preceding claims, wherein each tubular element (1) is closed at each end by a flange, at least one of said flanges via said flange said coolant or coolants (5). Heat exchanger, configured to allow circulation of 5 _c , 5 _f ). 7. The heat exchanger of claim 6, wherein the flange is configured to allow alternating circulation of the coolant heated by the heat source and the coolant cooled by the cold source. 8. Heat exchanger according to claim 7, characterized in that one of the heat exchange plates (3) is provided with a plurality of first fins (31) in contact with the liquid (4). The heat exchanger as claimed in claim 1, wherein one of the heat exchange plates (3) is provided with a plurality of first fins (31) in contact with the coolant (5 _f ). 10. Heat exchanger according to claim 8 or 9, characterized in that one of the heat exchange plates (3, 3 _c ) is provided with a plurality of second fins (32) in contact with the coolant (5, 5 _c ). . The heat exchanger (1) according to any one of the preceding claims, characterized in that the various tubular elements (1) are parallel to each other. 12. The tubular element (1) according to claim 11, characterized in that the various tubular elements (1) are held together by straps, each strap being attached to a threaded rod (7) clamping the tubular elements and positioned between at least two tubular elements. Heat exchanger. 12. Heat exchanger according to claim 11, characterized in that the various tubular elements (1) are held together by straps, each strap clamping the tubular elements and being welded to each other. 12. The heat exchanger according to claim 11, wherein the various tubular elements (1) are held together by straps, each strap clamping the tubular elements and soldering them together. 12. Each tubular element or core (1, 101) is also provided with coolant conduits (8, 9; 108, 109) and heat exchange plates (3) from said coolant conduits (8, 9; 108, 109). Heat exchanger (12, 123; 112, 113) for injecting said coolant onto said coolant. Pump, A pumping piston for activating the control means through the movement of the fluid, A drive piston connected to the pumping piston by means of movement and configured to be started by movement of the liquid 4 of the heat exchanger according to any one of claims 1 to 5, Heat source, Pump containing a cold source. 17. The pump according to claim 16, wherein the pump also passes a bypass configured to supply a coolant heated under pressure by the heat source to the tubular element or core 1 of the heat exchanger and a coolant cooled at atmospheric pressure by the cold source. Heat exchanger comprising a. System, The pump according to claim 16 or 17, Fluid reservoir, A system comprising control means.

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