• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Storage tank of non-pressurized heat transfer fluid having an inner layer (2) of insulating concrete having a thermal conductivity less than 1.05w/mk. The tank also has an outer layer (1) of concrete having a standard compressive strength comprised between 20 and 50mpa. The tank does not require reinforcements such as prestressing or post-tensioning. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2566831A1
    申请号:ES201400729
    申请日:2014-09-15
    公开日:2016-04-15
    发明作者:Cristina PRIETO RÍOS；David PÉREZ OSORIO；Edouard GONZALEZ ROUBAUD；Francisco Javier RUIZ CABAÑAS；Carlos RUBIO ABUJAS
    申请人:Abengoa Solar New Technologies SA；
    IPC主号:
    专利说明:


    of fluids applied to the aforementioned technologies: CN202784409 is one of the clearest examples of current molten salt tank technology for the solar thermal industry, consisting of insulating structures for steel tanks, so that this concept solves the problems of usual corrosion. This tank has a metallic outer layer which implies less structural stability and higher costs. Neither the example mentioned above nor others that can be found in the state of the art provide concrete solutions or solve the problems of current steel tanks of solar thermal technology. However, there are a number of documents related to all types of fluid or gas storage structures that partially or completely use the concrete in some of its elements, none of them being used in the scenarios of the present invention to same boundary conditions: W02002048602 (A1) refers to a bilayer concrete tank for the storage of liquefied natural gas whose walls, of both layers, are preferably post-tensioned and whose slab rests on multiple compartments or ballast chambers. W02002048602 (A1) specifies the mechanical requirements of the concrete to be used and protects, in addition, the following design variations: steel, aluminum and concrete as material, cylindrical, prismatic and cylindrical and spherical shapes, as well as steel or concrete roofs. The internal coating is not metallic but polymeric in nature. W02002048602 (A 1) is very focused on the construction process, since the main problem it solves with its design is the speed of execution. W02002048602 (A 1) requires a series of compartments that are not necessary in the present invention, since the present invention achieves structural and thermal stability by means of a concrete bilayer. Finally, W02014 / 023862A 1 presents a bilayer concrete tank for the storage of steam at high pressures and high temperatures that incorporates an internal metallic coating to maintain the quality of the fluid. Although the multilayer configuration is similar to that of the present invention, there are significant and, above all, necessary differences in design due to the initial requirements of both concepts. The main argument, and upon which all these differences are based, is the pressure conditions of the stored fluid. The present invention relates to a tank for non-fluid
    pressurized, on the contrary W02014 / 023862A1 refers to pressurized fluid tanks. The optimal geometry, and in particular the height / diameter ratio, presented by the pressurized tank is just the opposite of the optimum for the tank of the present invention. Another fundamental difference lies in the capacity of the outer layer: due to the strong stresses of the pressurized tank, there is a need to use a high-strength concrete in the wall of W02014 / 023862A1; however, for the non-pressurized fluid tank of the invention, the outer layer lowers its requirements by optimizing the design towards a conventional concrete. All this together with the nature of the fluid (in one pressurized steam / water, in another non-pressurized heat transfer fluids), which determines the type of material to be disposed in the internal coating, makes it impossible to use the configuration of the pressurized tank as a tank for non-pressurized fluid according to the conditions of this invention, and vice versa. Outside this fluid storage field there are some sectors that go to special concrete structures as a method of confinement. An example of all this occurs in the nuclear industry, in which the PWR (Pressurized Water Reactor) nuclear reactors are composed of a cylindrical concrete containment structure, however this concrete structure forms the structure of the building that houses the entire installation, including steam generators, nuclear vessels, etc. Therefore, it has not been found in the state of the art of storage tanks similar to the present invention. Therefore, for the purpose of this invention, which is to continuously contain an unpressurized fluid and at very high temperatures, it is found that the state of the art does not solve the problems that originate in the current thermoelectric solar plants, not eliminating differential seats for the foundations currently executed or avoiding corrosion problems in the structural elements of the tank. Therefore, the present invention aims to provide a tank or tank for storing a heat transfer fluid that supports very high temperatures without being pressurized, and also provides structural and operational stability for proper operation during its useful life. For this, a multilayer tank is used with an exterior wall of conventional structural concrete, an intermediate wall of refractory or insulating concrete and a coating (coating or liner, in English) metallic or otherwise for internal contact with the stored fluid. Description of the invention
    The invention relates to a storage tank for non-pressurized heat-carrying fluids comprising a double layer of concrete: the inner layer of insulating or refractory characteristics, this being understood as a refractory concrete that can withstand, without degradation of its thermomechanical properties, even more 10000 C with a thermal conductivity of less than 1.05W / mK, and cover the exterior of conventional reinforced concrete, understanding this as a commercial concrete with standard compressive strengths of between 20 and 50MPa. Due to the fact that it contains a non-pressurized fluid, it is not necessary to execute this structural layer with a prestressing or post-tensioning system, nor is it necessary to use high-strength concrete (greater than 50MPa). This contained fluid is in contact with a metallic coating as an internal coating that protects the concrete from corrosion and penetration of the fluid. With this configuration work temperatures greater than 600 ° C can be reached, without penalizing the cost; Moreover, the construction cost of energy storage systems for solar plants is reduced, thanks to the significant savings in construction materials by the use of concrete as a structural and insulating element. This configuration of materials allows to solve several of the problems of the current configurations of steel tanks for storage of non-pressurized heat transfer fluids. On the one hand, the seats suffered by the current tanks on the bed of expanded clay that serves as a foundation are avoided; The use of a rigid and resistant material such as concrete eliminates any risk of differential movements in the elements of the tanks. Current storage tank designs use vertical pumps that demand a minimum level of submergence, which requires having a dead volume of fluid that guarantees the net positive suction height (ANPA, NPSH in its acronym in Net Positive Suction Head) required by the pump, which increases the cost of the system. The invention allows the construction of a suction well of minimum dimensions at the base of the tank, guaranteeing the submergence of the pump without this irregularity in the base being subjected to thermomechanical stresses that may affect the constructive stability of the tank. In addition, as an added value of the present invention, it allows solving the
    severity of the current corrosion problems, by incorporating a single metallic element in the structure: the inner metal coating, which does not perform structural functions, only for protection and waterproofing of the first layer of refractory concrete with respect to the fluid lodged in the tank . Any corrosion problem does not affect in any case the structural behavior of the storage assembly, eradicating the serious consequences of corrosion on the walls of the steel tanks, which greatly penalizes the thickness of these sheets and, therefore, the cost. The fluid that these tanks will contain will be non-pressurized heat transfer fluids, being mainly and preferably molten salts, these acting as heat transfer fluids from solar thermal plants. Other fluids that the tank of the present invention allows to store are: oils, solar salts, non-pressurized water, particulate solids, sands and any material that does not need to be stored under pressure conditions. One of the main advantages of this new multi-layer concrete system is that it allows to reach working temperatures higher than those of the current technique, being able to accommodate non-pressurized heat transfer fluids in the hot zone of up to 800 ° C. The structural and geometric conditions will be determined by two actions: working temperature and height of the fluid housed inside the tank. For the first parameter, a layer of refractory concrete is sized whose thickness allows thermal flux to be absorbed so that the structural reinforced concrete wall can work correctly at low temperatures without affecting the mechanical behavior of the tank. This refractory layer has a thickness of at least 0.7m and more preferably of at least 0.5m and its function, therefore, is to insulate the structural wall so that its mechanical properties are not altered, nor are they affected The steel armor. This layer of refractory concrete is characterized by being composed of a refractory concrete consisting of a percentage of aluminous cement between 20% and 50% with respect to the total mass of the formulated dosage, whose composition is mainly calcium aluminate. The aluminous cement confers the thermal resistance and resistance to mechanical impact required in this concrete layer
    refractory.
    To withstand the efforts due to the physical actions of the fluid inside the
    tank against the walls that contain it, a concrete layer is sized
    structural, conventional reinforced concrete, which will be located in the outermost part; This layer, therefore, has a thickness of at least O, 30m. As for the general geometry of the tank, since it is a non-pressurized fluid, it is the structural component that determines the optimal geometry, since it is not necessary to minimize the pressurized surface, as in the case of pressurized fluids. A maximum height / diameter ratio of 0.7 is considered as the upper limit of the optimal range, with the lower limit being set at 0.2. All this for the different possible geometries that the present invention intends to describe. With regard to the quality of concrete, it is sufficient for both of them to have a conventional commercial concrete resistance (at least 20MPa), although it is essential that the refractory concrete has a low thermal conductivity (less than 1.05W / mK) in such a way that the distribution and evolution of the temperature in the thickness of this wall is correct in such a way that it prevents temperature variation at the interface of both layers of concrete, keeping this separation plane at a suitable temperature (less than 200 ° C, more preferably less than 150 ° C) for the structural behavior of the outer reinforced wall. The concrete layers are in contact but there are no connecting or connecting elements between them, this is achieved by concreting both layers in different phases. Since there is no physical connection between both layers, either by means of anchors, bolts or similar joining elements, the differences in dilations in one layer affect the other to a lesser extent and in this way the tensions in the concrete are minimized. Derived from these requirements, one of the greatest added values of the present invention arises and, therefore, one of the main innovations of this tank: by requiring a refractory concrete of conventional resistances (at least 20MPa), this concrete automatically becomes a structural concrete that the EHE-08 standard authorizes to be used as reinforced concrete. The immediate consequence of this is that this multilayer tank can be manufactured with the same formulation for both the refractory layer and the structural layer, obtaining a tank with two layers of refractory concrete, the outer layer being composed of reinforced refractory concrete. Finally, it will be necessary to insulate the concrete from the heated heat transfer fluid due to its incompatibility, for which an internal metallic coating is used. The
    different types of metallic material for this coating are necessary
    due to the very different scenarios that the coating must face
    internal metallic For temperatures below 400 ° C, the option of a metallic coating of carbon steel is proposed. For temperatures up to 650 ° C, it is necessary to go to stainless steels; and for higher temperatures an alloy steel base Ni-Cr is used. Since this metallic element is not a structural component of the tank system, this function is carried out by the reinforced concrete layer - its sizing is simplified to the point of allowing millimeter thicknesses only derived from corrosion protection; therefore this internal metal coating has a thickness of at least 2mm. The structural design envisaged for this type of storage tank will have a circular or rectangular shape, in plan, preferably being a cylindrical tank with the aim of optimizing the dimensioning of wall thicknesses by means of a homogeneous distribution of stresses and therefore reducing the final economic cost. For all previous configurations and shapes, as well as in all possible combinations, the walls may be arranged completely vertically, as a conventional tank, or inclined, as a raft. The main advantage of this last configuration, the inclined one, is to be able to use the terrain as a resistant part of the solicitations of the tank walls; in addition, with that smaller trapezoidal base shape, the volume of dead fluid is minimized while maintaining the necessary overall volume. However, the constructive simplicity provided by the vertical walls has a direct impact on costs, significantly lowering the solution; That is why it is the most viable option. Another of the main advantages of the present invention has a double slope, technical and economical, since this multi-layer concrete configuration allows the tank to be executed with three different arrangements: buried, semi-buried and exempt. They will be, mainly, the geometry of the tank and the characteristics of the terrain, the parameters that determine the optimal layout. The economic and technical advantage derived from this design and these three arrangement options is the fact that the need to thermally insulate the tank in its outer contour can be avoided, as is currently done by rock wool or silicates, since the action of concrete Internal refractory focuses on lowering the temperature of the refractory-structural interface, which is an immediate consequence that the external temperature of the tank will be very low with respect to the interior, resulting in an important optimization of the thermal losses of energy storage with
    This solution.
    There is even an additional advantage in two of the three previous provisions: with a buried or semi-buried tank, the insulating effect of the outdoor terrain will further optimize the thermal losses of the system, reducing the final construction cost at each step, due to the consequent optimization of thicknesses in the different layers. Both provisions, buried or semi-buried, benefit in terms of cost (due to the consequent reduction in wall thicknesses, again) if we add the aforementioned component of inclined walls. Another technical aspect derived from the buried and semi-buried arrangements is, depending on the characteristics of the land where the tank is located, the need or not of external cooling systems in contact with the ground, for example and preferably, with a mesh of pipes or "cooling pipes" located in the trasdoses of the lateral walls and under the lower slab of the tank. A final additional advantage of this multi-layer concrete tank system is that it will allow the type of roof to be adopted according to the needs of the overall design, since a multi-layer concrete roof may be chosen as a continuation of the rest of the elements of the tank and supported by internal pillars, these being constructed constructively with the same multilayer concept of the walls or with a special concrete, insulating or accumulator, which allows the structural stability of the whole. The advantage of this system is the cost savings of using standard and low cost building materials. The second option is to execute a steel cover as a continuation of the internal metal coating, if available, on which a suitable insulation system must be installed to the designed energy storage system, preferably with rock wool or silicate. This typology allows to eliminate the interior pillars of the design solution thus avoiding problems of stability of the roof, since being metallic can save greater lights, in this case, tank diameters. In addition, this option would benefit the construction process by being able to run prefabricated, complete or by modules, and subsequently placed on the structural perimeter of the tank or as a continuation of the inner metal coating. All this wide variety of structural configurations make this storage tank of non-pressurized carrier fluids stand out from the current
    state of the art, allowing: to store energy by means of a non-pressurized fluid at very high temperatures (200-8000 C) higher than the current working temperatures, use of conventional concretes to store said energy improving the current structural behavior at the same time as the costs associated with the construction of the designed tank system are considerably reduced and, finally, effectively and cheaply solving the main design and behavior problems of the current configurations, such as undesirable seating for the foundations and location and design of the pump group well. Brief description of the drawings
    For a better understanding of how much is described hereinSome drawings are accompanied in which, by way of example only,They represent different features of the invention.Figure 1: Plan view of a circular cross section tank.
    Figure 2: Plan view of a rectangular cross section tank.Figure 3: Elevation view of a tank with a well.Figure 4: Elevated view of a buried tank.Figure 5: Elevation view of a semi-underground tank.Figure 6: Elevation view of an exempt tank.Figure 7: Elevation view of a tank with sloping walls.Figure 8: Elevation view of a tank with metal cover.Figure 9: Elevated view of a tank with a multilayer concrete roof.Figure 10: Elevated view of a tank with cooling system.The essential elements of the invention are:
    one. Outer layer
    2. Inner layer
    3. Internal coating
    Four. 4F well. Background
    5. 5S cover. Upper portion
    6. Interior pillars
    61. First end
    62 Second end
    7. Wall
    8. Cooling system 81. Refrigerant pipe mesh Description of a preferred embodiment
    A first aspect of the invention relates to a storage tank ofnon-pressurized heat transfer fluids comprising:1a) an inner layer (2) of concrete:
    1 a1) insulator; 1 a2) configured to support without degradation of thermomechanical properties up to 11 OooC; 1 a3) which has a thermal conductivity of less than 1.05W / mK; 1b) an outer layer (1) of concrete: 1b1) having a standard compressive strength between 20 and 50MPa 1 b2) excluding reinforcement means selected between prestressed and
    post-tensioned Thus, the invention presents a series of differences compared to the prior art. Against W02002048602 (A 1), the invention has the following new features. The invention relates to a storage tank for non-pressurized heat transfer fluids while W02002048602 (A1) refers to a tank for pressurized fluids. Since the fluid of the invention is not pressurized, the mechanical stresses that the tank has to support generated by the contained fluid are not as high as those that the tank of W02002048602 (A1) must withstand. Consequently, both the material used and the construction structure itself of the tank of the invention must not meet such demanding mechanical requirements as those of the tank of W02002048602 (A1). These differences both in the material and in the structure of the tank allow the tank of the invention to be cheaper than that of W02002048602 (A1), since there is a saving in both material cost and execution of the tank.
    1a3) The inner layer (2) of the invention has a thermal conductivity of less than 1.05W / mK, while W02002048602 (A1) uses an insulating material to insulate the liquefied hydrocarbon gas from the outside of the tank. The invention does not need to maintain cryogenic temperatures, but quite the opposite, to maintain high temperatures. While W02002048602 (A1) employs an additional element to achieve the required thermal insulation, the invention already integrates the thermal insulation function into one of the building components, in the internal layer itself. This difference in the construction elements of the tank allows the tank of the invention to be cheaper than that of W02002048602 (A1), since there is a saving in both material costs and the execution of the tank.
    1b) The outer concrete layer (1) of the invention has a standard compressive strength between 20 and 50MPa, while both the inner layer and the outer layer of W02002048602 (A1) have a characteristic resistance of 50MPa. The invention does not need to achieve such high standard compression resistance values, so it is not necessary to resort to a concrete formulation that allows to reach a standard compressive strength of 50MPa for both the outer layer and the inner layer, with that concrete can be used without such restrictive specifications. This difference in the material of the tank allows the tank of the invention to be cheaper than that of W02002048602 (A1), since there is a saving in material cost. The W02002048602 (A1) tank requires 50MPa standard compressive strength materials for both the outer layer and the inner layer because the fluid it contains is pressurized. 1b2) The invention excludes reinforcement means selected between prestressed and post-tensioned while W02002048602 (A 1) has the outer layer and the inner layer post-tensioned. Since the fluid of the invention is not pressurized, nor is it a submerged tank that must also withstand the hydrostatic pressure of the depth to which the tank is subjected, the mechanical stresses that the tank has to withstand generated by the contained fluid are not as high as those that the W02002048602 (A1) tank must support. Consequently, both the material used and the construction structure itself of the tank of the invention must not meet such demanding mechanical requirements as those of the tank of W02002048602 (A1). These differences both in the material and in the structure of the tank allow the tank of the invention to be cheaper than that of W02002048602 (A1), since there is a saving both
    in material cost as in execution of the tank. In front of W02014 / 023862A1, the invention has the following new features. The invention relates to a storage tank for non-pressurized heat transfer fluids, while W02014 / 023862A 1 refers to a tank for pressurized fluids. Since the fluid of the invention is not pressurized, the mechanical stresses that the tank has to support generated by the contained fluid are not as high as those that the tank of W02014 / 023862A1 must withstand. Consequently, both the material used and the construction structure itself of the tank of the invention must not meet such demanding mechanical requirements as those of the tank of W02014 / 023862A1. These differences both in the material and in the structure of the tank allow the tank of the invention to be cheaper than that of W02014 / 023862A1, since there is a saving in both material cost and execution of the tank.
    1a3) The inner layer (2) of the invention has a thermal conductivity of less than 1.05W / mK, while that of W02014 / 023862A1 has a thermal conductivity of less than 0.5W / mK. The invention does not need to achieve such limited thermal conductivity values, so it is not necessary to resort to a concrete formulation that allows to achieve a thermal conductivity of less than 0.5W / mK, whereby concrete without such restrictive specifications can be used. This difference in the material of the tank allows the tank of the invention to be cheaper than that of W02014 / 023862A1, since there is a saving in material cost.
    1b) The outer layer (1) of concrete of the invention has a standard compressive strength between 20 and 50MPa, while that of W02014 / 023862A 1 has a characteristic strength greater than 50MPa. The invention does not need to reach such high standard compression resistance values, so it is not necessary to resort to a concrete formulation that allows to reach a standard compressive strength greater than 50MPa, whereby concrete without such restrictive specifications can be used. This difference in the material of the tank allows the tank of the invention to be cheaper than that of W02014 / 023862A1, since there is a saving in material cost. 1b2) The invention excludes reinforcement means selected from prestressed and
    post-tensioned while W02014 / 023862A 1 has the outer layer and the inner layer post-tensioned. Since the fluid of the invention is not pressurized, the mechanical stresses that the tank has to support generated by the contained fluid are not as high as those required by the tank of W02014 / 023862A 1. Consequently, both the material used and the The constructive structure of the tank of the invention itself must not meet such demanding mechanical requirements as those of the tank of W02014 / 023862A1. These differences both in the material and in the structure of the tank allow the tank of the invention to be cheaper than that of W02014 / 023862A 1, since there is a saving in both material cost and execution of the tank.
    According to other features of the invention:
    2a) The inner layer (2) comprises aluminous cement.
    3a) The inner layer (2) comprises a percentage of aluminous cement between 20% and 50% with respect to the total mass of the formulated dosage.
    4a) The aluminous cement comprises calcium aluminate. The invention comprises a new refractory concrete to withstand high temperatures trying to reach the resistance of a conventional concrete at a low economic cost, since commercial refractories are expensive and also, or are very insulating, or very resistant, but both combined do not exist. at viable cost.
    5a) The outer layer (1) comprises a conventional assembly.
    6a) The tank comprises an inner lining (3) on an inner wall of the inner layer (2). 7a) The outer layer (1) and the inner layer (2) are in contact. 8a) The contact between the outer layer (1) and the inner layer (2) excludes an interconnection between the outer layer (1) and the inner layer (2).
    9a) The tank comprises a well (4) in a bottom (4F) of the tank. 10a) The tank comprises a cover (5) in an upper portion (5S) of the tank. 11 a) The tank comprises an inner pillar (6) to support the cover (5). 12a) The inner pillar (6) has a first end (61) on a bottom (4F) of the tank and a second end (62) on the cover (5). 13a) The coating (3) is metallic. 14a) The coating (3) has a thickness of at least 2mm. 15a) The coating (3) is a material selected from carbon steel, stainless steel and Ni-Cr base alloy steel.
    16a) The tank has a cross section selected between circular and
    rectangular.17a) The inner layer (2) has a thickness of at least 0.5m.18a) The outer layer (1) has a thickness of at least 0.3m.
    5 19a) The inner layer (2) has a compressive strength of at least 20MPa.
    20a) The tank comprises inclined walls (7), increasing a cross section of the tank from a bottom (4F) to an upper portion (SS). 21 a) The tank has a circular cross section and a height / diameter ratio
    between 0.2 and 0.7. 10 22) The tank comprises an external cooling system (8) configured to cool a bottom (4F) and a portion of walls (7) of the tank. 23) The cooling system (8) comprises a mesh of cooling pipes
    (81) located in wall traces (7) and the bottom (4F).
    权利要求:
    Claims (2)
    [1]

    [7]
    7. Non-pressurized heat transfer fluid storage tank according to claim 1 characterized in that: 7a) the outer layer (1) and the inner layer (2) are in contact. 8. Storage tank for non-pressurized heat transfer fluids according to claim 7, characterized in that: 8a) the contact between the outer layer (1) and the inner layer (2) excludes a interconnection between the outer layer (1) and the inner layer (2). 9. Storage tank for non-pressurized heat-carrying fluids according to claim 1 characterized in that it comprises: 9a) a well (4) in a bottom (4F) of the tank. 10. Storage tank for non-pressurized heat-carrying fluids according to claim 1 characterized in that it comprises: 10a) a cover (5) in an upper portion (5S) of the tank. eleven. Storage tank for non-pressurized heat transfer fluids according to claim 10, characterized in that it comprises: 11 a) an inner pillar (6) for supporting the cover (5). 12. Non-pressurized carrier fluid storage tank according to claim 11 characterized in that: 12a) the inner pillar (6) has a first end (61) at a bottom (4F) of the tank anda second end (62) on the cover (5). 13. Storage tank for non-pressurized heat transfer fluids according to claim 6, characterized in that: 13a) the coating (3) is metallic. 14. Storage tank for non-pressurized heat transfer fluids according to claim 13, characterized in that: 14a) the coating (3) has a thickness of at least 2mm. fifteen. Non-pressurized heat transfer fluid storage tank according to theclaim 13 characterized in that: 15a) the coating (3) is of a material selected from carbon steel, stainless steel and Ni-Cr base alloy steel. 16. Storage tank for non-pressurized heat-carrying fluids according to claim 1 characterized in that: 16a) the tank has a cross-section selected between circular and rectangular. 17. Storage tank for non-pressurized heat transfer fluids according to claim 1, characterized in that: 17a) the inner layer (2) has a thickness of at least 0.5m. 18. Storage tank for non-pressurized heat-carrying fluids according to claim 1 characterized in that: 18a) the outer layer (1) has a thickness of at least 0.3m. 19. Storage tank for non-pressurized heat transfer fluids according to claim 1, characterized in that: 19a) the inner layer (2) has a compressive strength of at least 20MPa. twenty. Storage tank for non-pressurized heat transfer fluids according to claim 1 characterized in that it comprises: 20a) inclined walls (7), increasing a cross section of the tank from a bottom (4F) towards an upper portion (5S). twenty-one. Non-pressurized heat transfer fluid storage tank according to claim 1 characterized in that: 21 a) the tank has a circular cross-section and a height / diameter ratio between 0.2 and 0.7. 22 Storage tank for non-pressurized heat-carrying fluids according to claim 1 characterized in that it comprises an external cooling system (8) configured to cool a bottom (4F) and a portion of walls (7) of the tank. 2. 3. Storage tank for non-pressurized heat-carrying fluids according to claim 22, characterized in that the cooling system (8) comprises a mesh of refrigerant pipes (81) located in the walls of the walls (7) and the bottom (4F).
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    同族专利:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201400729A|ES2566831B1|2014-09-15|2014-09-15|Non-pressurized heat transfer fluid storage tank|ES201400729A| ES2566831B1|2014-09-15|2014-09-15|Non-pressurized heat transfer fluid storage tank|
    PCT/ES2015/070667| WO2016042188A1|2014-09-15|2015-09-15|Storage tank for non-pressurised heat transfer fluids|
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