EP3380773A1 - Speichereinrichtung und verfahren zur isobaren speicherung eines speicherfluids - Google Patents
Speichereinrichtung und verfahren zur isobaren speicherung eines speicherfluidsInfo
- Publication number
- EP3380773A1 EP3380773A1 EP16797471.6A EP16797471A EP3380773A1 EP 3380773 A1 EP3380773 A1 EP 3380773A1 EP 16797471 A EP16797471 A EP 16797471A EP 3380773 A1 EP3380773 A1 EP 3380773A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cushion
- storage
- phase change
- gas
- change material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0176—Shape variable
- F17C2201/018—Shape variable with bladders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/031—Air
Definitions
- the invention relates to a storage device with at least one
- Storage container for isobaric storage of a storage fluid with a cushion and / or a cushion element Furthermore, the invention relates to such a pillow and such a cushion element. In addition, the invention relates to a method for producing said memory device.
- the known memory devices are used, for example, as
- Compressed air storage in an industrial compressed air network or as energy storage for storing energy in the form of high pressure air In simple storage devices, the pressure with which the storage fluid is stored in the storage device decreases as the storage fluid is removed from the storage device. Corresponding storage devices in this case have storage containers that provide only the storage volume for storing the storage fluid. If the use of the stored storage fluid to be at a certain pressure level, either only a small part of the stored storage fluid can be used or the storage fluid must be kept at a much higher pressure level in the storage tank to the desired amount of storage fluid with the desired pressure of the
- the pressure level is determined by the vapor pressure of the condensable gas, which is dependent on the respective temperature.
- Storage fluids is the influence of temperature on the pressure level of the
- storage tanks must be able to receive the storage fluid and the condensable gas separately from each other, such that a medium can compensate for the change in volume of the other medium. It must therefore be provided in the storage container, a kind of piston or a flexible partition that allow very large volume shifts between the media. Therefore, the present invention is based on the object
- Storage fluids can be stored isobar more easily and cost-effectively in a reliable manner.
- a pillow for isobaric storage of a storage fluid in a storage container wherein the pad has a closed and at least partially flexible shell, wherein in the shell at least one between -200 ° C and 200 ° C and between 0 bar and 300 bar condensing cushion gas is provided and wherein in the shell at least one present at least partially in solid phase, between -200 ° C and 200 ° C and between 0 bar and 300 bar melting phase change material (PCM phase change material) is provided.
- PCM phase change material melting phase change material
- the object underlying the invention in a storage device is achieved in that at least one cushion according to one of claims 1 to 10 and / or that at least one cushion element according to one of claims 11 to 13 is provided in the storage container .
- the object of the invention mentioned at the outset is also achieved according to claim 17 by a method for producing a memory device, preferably according to one of claims 14 to 16, for isobaric storage of a storage fluid, in which at least one cushion according to one of claims 1 to 10 and / or at least one cushion element according to any one of claims 11 to 13 are introduced into at least one storage container.
- the invention has recognized that a high temperature stability in a particularly simple and expedient manner by the use of a
- Phase change material can be achieved, which is held together with the condensable gas, the so-called cushion gas, in a cushion comprising an at least partially flexible sheath.
- the compound or the plurality of compounds is considered, at least in an operating state of the
- the cushion gas is not limited to a substance that actually exists as a gas.
- the term cushion gas is appropriate because the at least one compound of the cushion gas is in gaseous form under ordinary ambient conditions, for example at 1 bar and 20 ° C. Corresponding compounds are commonly referred to as gas.
- the term "cushion gas” will be used hereinafter to express it explicitly or through the context where necessary, whether from the condensed, ie, liquid, portion of the cushion gas or gaseous Pillow gas is the speech.
- the cushion gas When storage fluid is pumped into the storage container of the storage device, the cushion gas partially condenses to that for receiving the storage fluid release required volumes. In this process, heat of condensation is released, which leads to an increase in temperature, in particular of the cushion gas, unless this heat can be dissipated.
- the partially condensed cushion gas vaporizes to fill the volume released.
- Phase change material added during loading of the storage container and discharged when removing storage fluid from the storage tank again as heat of evaporation of the cushion gas.
- the phase change material ultimately serves as a heat storage, wherein the heat is stored by partial phase change of the phase change material.
- heat is absorbed during the melting of the phase change material and stored until the energy is released again during solidification.
- the melting and solidification takes place at at least almost constant temperature, so that the heat absorption and heat dissipation do not lead to a temperature shift.
- Another advantage of using the phase change material is that the melting temperature or the solidification temperature is significantly less pressure-dependent than the boiling temperature of the cushion gas.
- the pressure level can be above or below a reference pressure, for example in a plant, such as a
- Ambient pressure of 1 bar lie. It is thus possible to store the storage fluid under overpressure or underpressure. Therefore, storage fluid is either forced into the storage tank or sucked into the storage tank. Because in both cases The pressure of the storage container remains at least substantially constant, so if necessary, a vacuum can be maintained or stored.
- Vacuum is then required both outside and inside the
- Phase Change Materials are basically known from other applications. It is for the application of sufficiently stable materials with a fairly high phase change enthalpy for the phase change from solid to liquid and back, the melting temperature in the temperature level of industrial processes. If the pillow gas and that
- Phase change material are coordinated so that they have a similar, if not the same, boiling temperature or melting temperature at the intended pressure level of the storage container, the
- Phase change of the phase change material and the phase change of the cushion gas to ensure an isobaric storage of storage fluid at a constant temperature. Since the storage of storage fluid is typically provided in a temperature interval between -200 ° C and 200 ° C and in a pressure interval between 0 bar and 300 bar, the cushion gas and the phase change material in this temperature and pressure range should make a simple phase change.
- the temperature and thus the pressure in the storage container is determined in particular by the melting temperature or phase change temperature of the phase change material.
- the cushion gas will have an identical or preferably at least very similar temperature, which determines the vapor pressure of the gaseous portion of the cushion gas and thus the pressure of the storage fluid.
- At least substantially isobaric storage of storage fluid is considered to be an isobaric storage of storage fluid.
- Storage fluids are not excluded, which lead to a change in the pressure in the storage tank.
- it is not critical that the pressure in the at least one storage container when filling and emptying is exactly constant, but rather remains at about a pressure level.
- the invention has further recognized that it leads to a constructive simplification of the storage device when the condensed cushion gas and the
- PCM Phase change material
- Phase change material can be replaced. This can be done indirectly if the cushion gas is neither condensed nor gaseous in direct
- Phase change material and the cushion gas are in direct contact with each other, which accelerates the heat transfer.
- a good heat transfer between the cushion gas and the phase change material ensures that the temperature of the cushion gas during filling or emptying does not change or in any case only slightly. Against this background, it may be appropriate if the
- Phase change material is at least partially surrounded by the cushion gas.
- Storage tank can be placed in this. This is advantageous for storage containers to be manufactured, but in particular also for the retrofitting of existing and optionally operated storage containers for isobaric purposes
- Corresponding cushions can be used easily and inexpensively in both cases. It is only necessary to bring the pillows in the appropriate storage container. An anchor in it or one Connection with certain facilities of the storage container is unnecessary. In this case, if necessary, only a pad can be introduced into a storage container, wherein the pad then preferably has such a size to allow a sufficient volume displacement between the pad gas and the storage fluid. Alternatively, however, it is also possible to introduce a plurality of cushions, in particular a plurality of cushions, into a storage container. The use of many pillows is particularly suitable for larger storage containers. This is especially true when retrofitting storage containers, since the openings available for the introduction of the cushions typically have a limited cross-section. For this come about inspection openings, such as
- the at least partially flexible shell of the pad ensures that the pillow can take on different volumes, depending on the filling state and
- the casing Since the pressure of the storage fluid stored in the storage container typically corresponds to the internal pressure of the pad or the pressure of the pad gas, the casing only has to be partially flexible. An elastic shell in the sense of an expanding and contracting balloon is not required. However, some resilience of at least portions of the material of the sheath may be useful to provide durable sheaths whose material, for example, is not prone to cracking. The elasticity of the shell should therefore primarily ensure that the shell can easily deform as a result of the volume change of the cushion gas. However, the change in volume does not have to be provided by the elasticity, ie by the expansion or contraction of the material of the casing.
- Storage container can be inserted, the pillow under a considerable internal overpressure.
- a cushion surrounding, dimensionally stable and gas-permeable outer skeleton can be provided in a pad element next to the pad.
- the gas permeability of the outer skeleton ensures that in the operating condition the pressure of the
- Storage fluid acts on the shell of the pad. Furthermore, the skeleton is tuned to the cushion received therein so that the cushion at least for a certain temperature at a certain pressure, especially at
- the pad, the pad member, the memory device, and the method of manufacturing a memory device will be described in common without specifically distinguishing between the respective device and / or the method. This achieves better comprehensibility and avoids unnecessary repetitions.
- the respective context which features are preferred in each case with respect to the respective device or the method.
- the pad at least one above -40 ° C., preferably above 0 ° C., in particular above 10 ° C. and / or below 120 ° C., preferably below 50 ° C.,
- cushion gas and / or phase change material may be the sole and / or an additional cushion gas and / or phase change material. It also lends itself to the use of the cushion, if the aforementioned temperature ranges also apply to the cushion gas and the phase change material.
- phase change material should preferably be about the same
- the condensation the at least one cushion gas and / or the melting of the at least one phase change material may furthermore preferably be at a pressure level above 1 bar, preferably above 2 bar, and / or below 80 bar,
- phase change temperatures between 0 ° C and 50 ° C, in particular between 10 ° C and 50 ° C would be sufficient, in this
- Phase change material consists. Against this background, depending on
- the phase change may preferably be carried out in a pressure range below 1 bar.
- the pressure data are understood in the present case as absolute pressures, unless stated otherwise.
- the storage device can be used as a vacuum storage. It can therefore be provided for, in particular industrial processes, a vacuum of a corresponding pressure level. At pressures above 1 bar, however, in particular a pressure storage using the storage device comes into consideration.
- pressures for the phase change of the at least one cushion gas and / or at least one phase change material of more than 2 bar are particularly suitable. For example, for applications such as natural gas storage,
- Hydrogen storage, pressure compensation in compressed air networks, pumped storage or compressed air energy storage a pressure upper limit for the phase change of 80 bar often sufficient. If compressed air energy storage is of lesser importance, an upper pressure limit of 40 bar may be sufficient. In particular, for general compressed air networks, these are, if necessary, only 20 bar.
- pressure ranges for the phase change of the at least one cushion gas and / or phase change material arise, for example, 1 bar to 300 bar, 2 bar to 300 bar, 2 bar to 80 bar, 2 bar to 40 bar or 2 bar to 20 bar.
- the phase change material (PCM - Phase Change Material) is at least partially in the form of a plurality of particles. In this way, a large surface of the phase change material is provided, which is the
- Heat exchange of the phase change material with the cushion gas in gaseous and / or condensed form favors.
- a larger heat transfer surface ultimately improves the heat transfer.
- the particles of the phase change material are at least partially in the condensate of the cushion gas, wherein the particles of the phase change material can, if necessary, float in the condensate. Due to the higher specific heat capacity of the
- phase change material Particle sizes between 0.1 ⁇ and 50 mm exposed. Particle sizes between 1 ⁇ and 20 ⁇ or between 1 mm and 10 mm are particularly preferred. Smaller particle sizes lend themselves to smaller pads and allow better heat transfer, while larger particle sizes are suitable and easier to handle for larger pads where heat transfer is less critical.
- the phase change material In order for the phase change material to be able to reversibly change the phase reversibly without problems, ie to melt repeatedly without lumping and to solidify again, it makes sense if the particles of the phase change material are encapsulated. In this case, the capsule of the particles remains basically intact, while the phase change material in the capsule melts at least partially, depending on the heat absorption or heat release and solidifies again. In the manner described above, for example also ensures that the memory device can go through many cycles without the functionality of the memory device decreases.
- At least one plastic, at least one polymer, at least one metal, at least one melamine resin, at least one is suitable for forming the capsules for accommodating the phase change material (PCM)
- PCM phase change material
- phase change material is particularly dependent on the chemical properties of the material of the capsules with respect to the cushion gas and the phase change material and the size of the particles of the phase change material.
- Phase change material is formed by a paraffin, a salt hydrate, a salt mixture, a sugar alcohol, a fatty alcohol, a fatty acid or a polyethylene glycol. Which phase change material is particularly suitable is likely
- phase change material in particular be dependent on the temperature of the phase change, ie, the melting temperature of the phase change material. This should match as well as possible with the phase change temperature of the cushion gas, which is provided together with the phase change material in the sheath of the pad.
- paraffins for example, octadecane, heptadecane, nonadecane, eicosane, docosane, or as salt hydrates, and CaCl 2 6H 2 0, Na 2 S0 4 -10H 2 0, Na 2 HP0 4 -12H 2 0, Na 2 S 2 0 3 5H 2 0 or NaCH 3 COO-3H 2 0 in question.
- the shell is at least partially formed from a plastic which may be reinforced.
- a plastic which may be reinforced.
- at least one fabric and / or the reinforcement by fibers comes into question as reinforcements.
- the sheath can therefore also in particular at least partially by a composite material comprising plastic in the sense of a composite material be given.
- Corresponding woven and / or fiber-reinforced plastics have the advantage that they withstand an increased internal overpressure of the sheath, without any risk of bursting of the sheath. The pads thus remain intact even when the back pressure normally applied by the stored storage fluid should be removed from the sleeve.
- the plastic to form the shell at least partially of nitrile rubber (NBR), hydrogenated acrylonitrile-butadiene rubber (HNBR), ethylene-propylene-diene rubber (EPDM), polyethylene (PE),
- NBR nitrile rubber
- HNBR hydrogenated acrylonitrile-butadiene rubber
- EPDM ethylene-propylene-diene rubber
- PE polyethylene
- Polyvinyl chloride (PVC) and / or butyl rubber may be formed. These materials provide sufficient strength and rigidity and are also sufficiently resilient to avoid breakage of the shell due to deformation. Which plastic is particularly suitable, lies in particular on the
- the intended temperature level of the storage container can influence the choice of the plastic.
- Storage tank should be large enough to compensate for a large volume change of the storage fluid can.
- the maximum volume of the at least one cushion should be small enough to allow the cushions to be handled easily, in particular to easily enter the at least one cushion
- the maximum volume of the pad is between 0.1 dm 3 and 5000 dm 3 , preferably between 0.1 dm 3 and 1000 dm 3 , in particular between 0.1 dm 3 and 100 dm 3 , in particular between 0.1 dm 3 and 1 dm 3 , is.
- Large volumes can be used, for example, for applications in large storage containers, such as the
- Compressed air storage on.
- a cushion gas comes according to the intended temperature levels and pressure levels of the storage container of the storage device due to the respective boiling points a hydrocarbon, in particular propane, isobutane or cyclopropane, at least one halogenated hydrocarbon, especially tetrafluoroethane, pentafluoroethane, heptafluoropropane or hexafluoropropene, dimethyl ether, ammonia, carbon dioxide and / or nitrous oxide in question.
- halogenated hydrocarbon especially tetrafluoroethane, pentafluoroethane, heptafluoropropane or hexafluoropropene, dimethyl ether, ammonia, carbon dioxide and / or nitrous oxide in question.
- These cushion gases are also preferred because of their chemical properties to different with
- the at least one cushion can be handled separately.
- the pillow is therefore not fixed, for example, connected to the storage container or other facilities of the storage device.
- the pillow can therefore be free in the
- the cushions can therefore be produced outside the storage container and then only have to be introduced into the storage container.
- the pillows can be hermetically sealed in themselves and the
- Phase change material and the cushion gas so the condensable gas in a predetermined amount and / or in a predetermined ratio.
- a connection of pillows with each other is conceivable, but generally less preferred. It is particularly simple if the at least one cushion of the storage device and the at least one storage container of the
- Storage device not, at least not fixed to each other.
- the at least one cushion is spherical, lenticular or elongated.
- the pillows can be easily inserted into the storage container and can the pillows additionally exercise their function in the storage containers in a preferred manner.
- the cushions then hinder little, for example, even if the volume of the cushions are cyclically larger and smaller again. Hooking or pinching individual pillows is then less likely.
- the cushion element it is particularly preferred if the skeleton of the cushion element that the cushion
- skeleton encloses, is formed of metal and / or plastic. It may be preferred for the sake of simplicity, when the skeleton is formed by wires and / or is formed in the form of a grid and / or in the form of a honeycomb structure. In this way, very stable skeletons can be provided, which consume little material and have only a low weight at the same time.
- the cushion elements it is preferable for the reasons already stated above with respect to the cushion if the entire cushion element can be handled separately. The same applies to a spherical, lenticular or elongate shape of the at least one cushion element as such.
- the isobaric storage reservoir In order to ensure that storage of the storage fluid occurs at the desired temperature, even if the ambient temperature deviates from this temperature, or if the ambient temperature is subject to variations, it is appropriate for the isobaric storage reservoir to be stored
- Storage fluid is thermally insulated. It may further be preferred if a corresponding control device is provided which ensures the regulation of the desired setpoint temperature of the storage fluid in the storage container.
- the storage fluid can basically be a gas or a liquid.
- compressed air is particularly preferred, especially if the storage device is part of a compressed air network, a pneumatic system, such as a brake system, or an energy storage.
- a compressed air network should be compressed air typically provided at a certain pressure level.
- Compressed air is used for various industrial processes as working gas or process gas.
- compressed air can also be used only for the storage of, in particular electrical, energy in the form of compressed air, wherein initially energy is used to compress the storage fluid. At a later time, for example, electrical energy can then be provided by relaxing the stored storage fluid. Since the storage fluid here only acts as a working fluid for storing the energy is used as storage fluid of the
- the storage fluid may also be a so-called useful gas which is to be reactively reacted in a specific process.
- the useful gas must be in the storage device
- the useful gas can be introduced, for example, as a raw material in a reactor.
- the useful gas may also be so-called fuel gases such as natural gas or hydrogen, which in a
- Burning chamber can be burned to generate heat energy in this way.
- the storage fluid When storing storage fluids in the form of liquids, in particular, the use as an energy storage offers. Rather than pumping the storage liquid, which may be water for convenience, into a higher reservoir, for example, to subsequently recover the potential energy, as is the case, for example, in pumped storage power plants, the storage fluid may also become isobaric under elevated pressure a storage container to be pressed. Even then, under relaxation of the storage fluid, the energy applied for the storage of the storage fluid energy at least partially be recovered. Another application is, for example, the
- Storage container vorzugswiese closed after introduction of the at least one pad and / or cushion element and then at least partially filled with at least one storage fluid.
- So storage fluid can be provided at a certain pressure level.
- Fig. 1A-C an inventive pillow for isobaric storage of a
- FIG. 2 shows a first memory device according to the invention for the isobaric
- Fig. 3 shows a second memory device according to the invention in one
- FIG. 4 shows a third memory device according to the invention for isobaric
- Sectional view Fig. 5 shows a material for forming a shell of a pad according to the invention for the isobaric storage of a storage fluid in a schematic
- Fig. 6 shows an inventive cushion element in a schematic
- FIG. 7 the cushion of the cushion member of FIG. 6 in a schematic
- FIG. 1 shows a cushion 1 for the isobaric storage of a storage fluid 2 in a vertical section.
- the pad 1 comprises a shell 3 in which a cushion gas 4 and a phase change material (PCM) 5 are included.
- the cushion gas 4 is partly in the gas phase 6 and partly as condensate 7 in the liquid phase.
- the phase change material 5 In or on the condensate 7 of the cushion gas 4 floats the phase change material 5, which thus stands in direct contact with the cushion gas 4 and with the condensate 7 of the cushion gas 4.
- the phase change material 5 is in the form of a plurality of particles 8 which provide a large heat transfer area to the cushion gas 4.
- the particles 8 have in the illustrated and so far preferred cushion 1 an outer capsule 9, in which the actual
- Phase change material 5 is included.
- the particles 8 are present as the
- Phase change material 5 considered, even if actually only the material contained in the capsules 9 undergoes a phase change during operation. However, if the distinction between the phase-changing material and the capsules 9 of the particles 8 forming material is of importance in the present case, but also a more precise distinction in capsule material and phase change material. 5
- the pressure within the shell 3 and the temperature of the cushion gas 4 are in a direct relationship. Namely, the inner pressure of the shell 3 corresponds to the vapor pressure of the cushion gas 4 at the temperature prevailing inside the shell 3. It is condensed according to FIG. 1A, only a minor part of the cushion gas 4. Therefore, the pad 1 occupies a majority of its maximum volume. The maximum volume of the pad 1 and the shell 3 is not achieved only because the pad 1 in a not shown
- Storage tank is provided and there the pressure of the stored in the storage container and the cushion 1 surrounding storage fluid 2 is exposed.
- the inner pressure of the shell 3 and the external pressure are identical. Therefore, the pad 1 and the storage fluid 2 divide the volume of the storage container. The more storage fluid 2 is pressed into the storage container, the smaller the volume of the cushion 1.
- the maximum volume of the cushion 1 shown in Fig. 1A is reached when the external pressure has dropped so far or the storage container has been emptied so far in that the cushion 1 or its shell 3 takes the form of a sphere. Since the shell 3 of the cushion 1 shown in Fig.
- the shell 3 of the cushion 1 shown in FIG. 1 is formed from a uniform material 10.
- the material 10 is a reinforced by a fabric or fibers plastic. It would also be an unreinforced plastic in question, if the risk of bursting of the shell 3 due to an internal overpressure can be accepted.
- FIG. 1B the shell 3 or the cushion 1 is present in a shape which has collapsed somewhat more in comparison with the illustration according to FIG. 1A. A larger proportion of the condensable cushion gas 4 is condensed, so that the shell 3 occupies less volume overall.
- Phase change material 5 is stored. Ultimately, so will the
- Phase change material 5 stored. This process is reversible, taking into account a practically unavoidable dissipation during heat transport, so that the heat of fusion from the solidifying phase change material 5 as
- Heat of evaporation is added to increase the volume of the pad 1 again.
- the pad 1 is shown in a state in which only a small part of the gas cushion 4 is present in the gas phase 6.
- the at least one pad 1 should in this case be adapted to the process of storing storage fluid 2, that at maximum filling of the at least one storage container one
- FIG. 2 shows a storage device 11 with a storage container 12 in a vertical section.
- the storage container 12 has on the head side a valve 13 in a connecting line 14, can be pressed over the storage fluid 2 in the storage container 12 and discharged from the storage container 12 again. If the valve 13 is closed, remains in the illustrated and so far preferred
- the storage fluid 2 in the storage tank 12 is a gas, in particular compressed air, on a
- a pad 1 In the storage container 12 is in this embodiment of the memory device 11, only a pad 1.
- the pad 1 is filled with a cushion gas 4 in the form of 1,1,1,2-tetrafluoroethane (R134a), the partially gaseous in the gas phase 6 and partially is present as condensate 7. Furthermore, the pad 1 still contains phase change material 5 in the form of a paraffin, which is received in a plurality of encapsulated particles 8.
- the paraffin has a melting temperature of 26 ° C.
- the sheath 3 of the pad 1 is formed of a nitrile rubber (NBR).
- FIG. 3 shows an alternative embodiment of a memory device 11, which essentially differs from the memory device 11 according to FIG. 2 only in that a multiplicity of pads 1 in the one
- Storage tank 12 is provided.
- the corresponding storage container 12 is, in particular, a storage container 12 retrofitted for isobaric storage of a storage fluid 2.
- the retrofitting is carried out in such a manner that the cushions 1 have been loosely introduced into the storage container 12. This can be done for example via a manhole, not shown, or via another flange connection, for example for connection of the valve 13 or the connecting line 14.
- FIG. 4 shows a memory device 15, which is a modification of the memory device 11 according to FIG. 3.
- the storage container 16 has an outer thermal insulation 17 made of a known thermal insulation material. The insulation 17 is used to keep the temperature in the storage tank 16 at a certain temperature level and / or to limit the heat exchange with the environment.
- a material 10 for forming a shell 3 of a pillow 1 of the type mentioned is shown schematically.
- the material 10 is a composite material made of a plastic and with the plastic welded or embedded in the plastic webs 20.
- the fabric webs 20 serve to reinforce the material 10.
- the fabric webs 20 are superimposed lattice-like or crosswise, although Other configurations may be useful.
- the cushion 1 accordingly allows a greater internal overpressure, without causing lasting damage to the shell 3.
- a fiber-reinforced plastic as the material 10 of the sheath 3 or to completely dispense with reinforcement.
- Plastic of the material 10 shown in FIG. 5 is a nitrile rubber (NBR). However, other plastics are also conceivable.
- NBR nitrile rubber
- FIG. 6 shows a cushion element 21 comprising a cushion 1 of the type mentioned and an outer skeleton 22 surrounding the cushion 1.
- the skeleton 22 is permeable to gas and formed by wires 23 which are interconnected in the form of a grid structure. Other skeletons, however, can be used.
- the skeleton 22 encloses a volume that corresponds at most to the maximum volume of the pad 1, preferably slightly smaller than the maximum volume of the pad 1.
- the pad 1 can thus be at a correspondingly low external pressure, for example, an external pressure of 1 bar, from the inside of the skeleton 22, so that the skeleton 22, the cushion 1 and the shell 3 is supported to prevent damage to the shell 3 due to the internal pressure.
- a pad 1 is shown. It can be a pillow 1 of a
- cushion element 21 act.
- the pad 1 may, if necessary, without outer skeleton 22nd be used.
- the pad 1 has a valve 24 for filling the pad 1 with pad gas 4.
- the phase change material 5 can be introduced, if necessary, before closing the shell 3. It is particularly simple and expedient to produce the shell 3 by means of extrusion and while the
- Phase change material 5 in the shell 3 introduce.
- a cushion gas 4 optionally gaseous and / or liquid, can subsequently be introduced into the shell 3.
- the gas present in the cushion 1 may be previously completely or partially removed. Then the cushion 1 can be used particularly effectively.
- the pad 1 it is fundamentally harmless for the basic function of the pad 1 if, in addition to the phase change material 5 and the pad gas 4, another gas, for example air, is located in the pad 1. It may also be necessary if necessary to provide a liquid which can stabilize the phase change material 5. The liquid and the particulate phase change material may then be present together in the form of a suspension or slurry.
- another gas for example air
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015120384.7A DE102015120384B4 (de) | 2015-11-25 | 2015-11-25 | Speichereinrichtung und Verfahren zur isobaren Speicherung eines Speicherfluids |
| PCT/EP2016/076507 WO2017089089A1 (de) | 2015-11-25 | 2016-11-03 | Speichereinrichtung und verfahren zur isobaren speicherung eines speicherfluids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3380773A1 true EP3380773A1 (de) | 2018-10-03 |
Family
ID=57326349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16797471.6A Withdrawn EP3380773A1 (de) | 2015-11-25 | 2016-11-03 | Speichereinrichtung und verfahren zur isobaren speicherung eines speicherfluids |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3380773A1 (de) |
| DE (1) | DE102015120384B4 (de) |
| WO (1) | WO2017089089A1 (de) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4134491A (en) | 1978-02-24 | 1979-01-16 | The International Nickel Company, Inc. | Hydride storage containment |
| US4581285A (en) | 1983-06-07 | 1986-04-08 | The United States Of America As Represented By The Secretary Of The Air Force | High thermal capacitance multilayer thermal insulation |
| US4462224A (en) | 1983-07-11 | 1984-07-31 | Minnesota Mining And Manufacturing Company | Instant hot or cold, reusable cold pack |
| DE3338879C2 (de) | 1983-10-24 | 1986-11-13 | Mannesmann AG, 4000 Düsseldorf | Druckgasbehälter |
| US5843145A (en) | 1996-01-23 | 1998-12-01 | Dura-Kold Corporation | Reusable hot/cold temperature pack |
| JP2000213695A (ja) | 1999-01-26 | 2000-08-02 | Osaka Gas Co Ltd | 吸着式ガスホルダ―およびガス貯蔵・供給システム |
| DE102005004587A1 (de) | 2005-02-01 | 2006-08-10 | Bayerische Motoren Werke Ag | Einrichtung zur Speicherung und/oder Druckerhöhung für Wasserstoff |
| DE102008013727A1 (de) | 2008-03-11 | 2009-09-17 | Stiebel Eltron Gmbh & Co. Kg | Wärmespeichervorrichtung |
| FR2950045B1 (fr) | 2009-09-17 | 2012-10-12 | Mcphy Energy | Reservoir de stockage et de destockage d'hydrogene et/ou de chaleur |
| ITMI20112050A1 (it) | 2011-11-11 | 2013-05-12 | Ohikia S R L | Miscela per lo stoccaggio di energia termica e dispositivo di accumulo e rilascio del calore utilizzante detta miscela |
| CN203082532U (zh) | 2013-02-06 | 2013-07-24 | 徐毅 | 吸附天然气快速解吸装置 |
| US8662343B1 (en) | 2013-04-12 | 2014-03-04 | Steelhead Composites, Llc | Pressure vessel and method of use |
| DE102013015888B4 (de) | 2013-09-23 | 2018-04-12 | Audi Ag | Kraftstofftank eines Kraftfahrzeugs sowie Verfahren zum Herstellen eines Kraftstofftanks |
-
2015
- 2015-11-25 DE DE102015120384.7A patent/DE102015120384B4/de active Active
-
2016
- 2016-11-03 WO PCT/EP2016/076507 patent/WO2017089089A1/de not_active Ceased
- 2016-11-03 EP EP16797471.6A patent/EP3380773A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE102015120384A1 (de) | 2017-06-01 |
| DE102015120384B4 (de) | 2022-08-04 |
| WO2017089089A1 (de) | 2017-06-01 |
| WO2017089089A9 (de) | 2018-03-29 |
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