EP3177879A1 - Heat engine comprising magnetocaloric material of the refrigerating machine or heat pump type - Google Patents
Heat engine comprising magnetocaloric material of the refrigerating machine or heat pump typeInfo
- Publication number
- EP3177879A1 EP3177879A1 EP15748021.1A EP15748021A EP3177879A1 EP 3177879 A1 EP3177879 A1 EP 3177879A1 EP 15748021 A EP15748021 A EP 15748021A EP 3177879 A1 EP3177879 A1 EP 3177879A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cold
- hot
- chamber
- machine according
- distributor
- 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- Withdrawn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
- 239000000463 material Substances 0.000 title claims abstract description 43
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 239000013529 heat transfer fluid Substances 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims description 52
- 230000005291 magnetic effect Effects 0.000 claims description 35
- 238000005192 partition Methods 0.000 claims description 18
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 9
- 239000002826 coolant Substances 0.000 claims description 8
- 239000011149 active material Substances 0.000 claims description 4
- 230000003068 static effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- SYHGEUNFJIGTRX-UHFFFAOYSA-N methylenedioxypyrovalerone Chemical compound C=1C=C2OCOC2=CC=1C(=O)C(CCC)N1CCCC1 SYHGEUNFJIGTRX-UHFFFAOYSA-N 0.000 description 1
- 239000012925 reference material Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2321/00—Details of machines, plants or systems, using electric or magnetic effects
- F25B2321/002—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects
- F25B2321/0021—Details of machines, plants or systems, using electric or magnetic effects by using magneto-caloric effects with a static fixed magnet
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Definitions
- the present invention relates to a thermal machine magnetocoramic material of the type refrigerating machine or heat pump for increasing the temperature between the inlet and the outlet of a hot circuit and to lower the temperature between the inlet and the out of a cold circuit.
- references in brackets ([]) refer to the list of references at the end of the text.
- the same thermal cycle is used in heat pumps by exploiting the temperature of the fluid reached after the compression phase.
- thermal machine magnetocaloric material is alternately subject the material to a strong magnetic field, of the order of a few teslas and then to a zero or almost zero magnetic field, and to exchange it thermally with either a hot fluid or with a cold fluid.
- a preferred solution for subjecting the material to this alternation of magnetization is to constitute it in the form of a ring mounted to rotate about its axis and to apply a fixed magnetic field to certain parts of the ring.
- Such configurations are found for example in the publications of A. Sarlah et al. [1] and EP 1 736 717 A1 [2].
- the circulation of heat transfer fluids is divided into angular sectors, in the axial direction, in reversed directions.
- the magnetocaloric material is for example in the form of balls, which allows a good heat exchange, but limits the possible flow rate of the fluid, under penalty of high hydraulic head losses.
- mixtures can be made between fluid parts at different temperatures, which considerably weakens the efficiency of the system.
- magnetocaloric material is arranged in the form of an annular bed at the periphery of a rotor.
- Magnetization means comprise a fixed core inside the rotor and a ring on the outside of the rotor.
- the bed comprises longitudinal channels so as to receive a heat transfer fluid which flows longitudinally in one direction or the other, according to its angular position.
- Two distributors are placed on either side of the bed, each dispenser having an inlet and an outlet.
- Each distributor has openings facing the channels of the bed and allow the passage of fluid from the inlet of a distributor to the exit from the other distributor.
- the dispensers are static and the bed scrolls past the openings during rotation of the rotor.
- the invention aims to provide a thermal machine magnetocaloric material that is efficient and optimized. It aims in particular to obtain a good seal between the rotor and the static part of the machine without significant loss by friction. It also aims to optimize the heat exchange between the fluid and the magnetocaloric material.
- the invention relates to a thermal machine magnetocaloric material comprising a central shaft, a rotor rotatably mounted on the central shaft, the rotor comprising an active bed comprising magnetocaloric material, the active bed being shaped to guiding a coolant between a cold end and a hot end axially offset, a hot distributor and a cold distributor respectively placed opposite the hot and cold ends along a connecting ring to provide or receive the heat transfer fluid flowing in the bed characterized in that the rotor comprises a hot flange and a cold flange rotatably mounted on the shaft and supporting the bed of magnetocaloric material respectively at the hot end and the cold end, each distributor having openings for communication fluidic relationship between the active bed and the respective distributor, and in that the machi does not include first means rotary seal between the flange and the shaft, and second sealing means rotating between the flange and the adjacent distributor beyond the connecting ring.
- the seal between the static part, comprising the central shaft and the distributors, and the rotating part, comprising the bed and the flanges, is formed symmetrically between each flange and the central shaft on the one hand, and between each flange and the respective distributor.
- it is limited to two seals per side means for sealing, which allows to better control the friction they generate.
- the hot distributor and the cold distributor comprise a first chamber connected to an input connector and a second chamber connected to an output connector, each chamber having openings opening into the zone of the connecting ring, the openings distributed along the perimeter of the ring being connected alternately to the first chamber and to the second chamber.
- the bed is connected to openings in communication with either the inlet or the outlet, which allows an alternation of the direction of circulation of the heat transfer fluid in the bed.
- the active bed comprises channels parallel to the axis of the shaft, the distributors being oriented angularly so that each channel connects a first opening communicating with a first chamber of one of the distributors to a second opening communicating with the second chamber of the other distributor. Thanks to the channels, the fluid is not dispersed during the crossing of the bed. In addition the pressure losses are limited, while allowing a good heat exchange between the fluid and the magnetocaloric material.
- the machine comprises means for driving the rotor in rotation.
- the machine comprises circulation means for circulating the fluid from the outlet to the inlet of one of the distributors. Wherever the circulation means are placed, they make it possible to circulate the fluid throughout the machine. Indeed, the fluid supplied by the circulation means in a first chamber is pushed through the bed and spring in the second chamber of the other distributor. When the circuit is looped between the outlet and the inlet of this other distributor, for example through a heat exchanger, the fluid pressure returns to the inlet and the first chamber of the other distributor, to push the fluid through the bed to the second chamber of the first distributor for a return to the circulation means.
- the machine comprises synchronization means for synchronizing the coolant flow rate and the speed of rotation of the rotor, so that the volume entering each of the channels as it passes in front of one of the openings corresponds substantially to to the volume of said channel.
- the speed of rotation of the rotor determines the time during which each channel is facing the same opening, so as to supply it with the fluid or to evacuate the fluid.
- the flow rate of the circulation means is distributed between all the channels which are facing openings of the first chamber. From these two parameters, one can therefore control the volume of fluid that passes through the channels.
- the inventors propose that the fluid which passes through each channel is substantially the volume of said channel before the reversal of the direction of circulation.
- the active bed comprises a body of tubular shape, pierced by axial through-slots, the housings containing a stack of parts with identical and constant section forming the channels. Some of the pieces are in the magnetocaloric material. The part using the magnetocaloric material is reduced to the strict minimum. In addition, since these parts form the channels, they are directly in contact with the heat transfer fluid to optimize heat exchange, with a good ratio between the exchange surface and the mass of material.
- the parts of the stack comprise two parallel walls connected by a plurality of partitions delimiting the channels between them, the partitions being substantially radial.
- the machine comprises magnetic means configured to subject the active bed to an alternation of magnetic fields between a strong field and a weak field distributed over the perimeter of the active bed.
- the alternations correspond to the inversion of the direction of circulation of the fluid.
- the magnetic means provide the strong magnetic field to the channels connected to the first hot chamber of the hot side and the weak magnetic field to the channels connected to the first cold room of the cold side.
- the active bed comprises a hot guide zone and a cold guide zone of non-active material on either side of an active section of magnetocaloric material, on the side of the hot flange and the cold flange respectively.
- This arrangement makes it possible to limit the use of the magnetocaloric material to the strict length subjected to the magnetic field. It allows to move the ends of the channels where the distribution of the fluid takes place so as to allow the second sealing means to be placed, while limiting the singular pressure losses by changing the cross section and limiting the volume of fluid that must pass through. the canal.
- the parts of the stack are for example different magnetocaloric materials whose Curie temperature evolves in a gradient and is higher on the hot side compared to the cold side.
- Such an arrangement makes it possible to obtain, under stabilized conditions, a temperature gradient along the channel substantially corresponding to the Curie temperature gradient, such that the magnetocaloric effect is optimized and as wide as possible.
- At least the first chamber of one of the distributors is delimited by a partition wall along the flange corresponding to the side, a first peripheral wall and a first bottom wall extending substantially parallel to the wall of the separation, the input connector opening into the first chamber by the first bottom wall.
- the second chamber is delimited between the first peripheral wall and a second coaxial peripheral wall.
- the volume of the second chamber is thus restricted.
- the cooled or heated fluid, depending on the side, is available quickly at the exit of the machine.
- the second chamber is further defined between the first bottom wall and a second bottom wall parallel to the first bottom wall, the input connector passing through said second bottom wall, an output connector being carried by the central shaft which has pipes opening into the second chamber.
- the input and output connector are well separated, which limits the heat exchange between one and the other.
- the second sealing means comprise a ring fixed at the periphery of the flange and a lip seal in leaktight contact with the ring.
- a ring makes it possible to choose the nature of the surface on which the lip seal bears.
- the ring may optionally be coated with PTFE.
- FIG. 1 shows an overall perspective view of a machine according to one embodiment of the invention
- FIG. 2 is an exploded view of the machine of FIG. 1;
- Figure 3 is a longitudinal sectional view of the machine of Figure 1;
- FIG. 4 is a perspective view of the magnetic means of the machine of FIG. 1;
- FIG. 5 is a perspective and exploded view of the bed of the rotor of FIG. 1;
- FIG. 6 is a front view of a part of a stack included in the bed of FIG. 6;
- FIG. 7 is a perspective view of a flange of the rotor and second sealing means
- FIG. 8 is a schematic view of a circuit incorporating a machine according to FIG. 1;
- FIG. 9 is a schematic view of the fluid flow through the magnetocaloric bed during operation of the machine.
- FIGS. 1 to 7 A thermal machine 1 with magnetocaloric material according to one embodiment of the invention is shown in FIGS. 1 to 7.
- the thermal machine 1 is intended to be inserted in a thermal system as shown in FIG.
- the thermal machine 1 makes it possible to raise the temperature level of a hot circuit 2 and to lower the temperature. 3.
- the thermal machine 1 is a refrigerating machine whose cold production is to be valued.
- the thermal machine 1 is a heat pump whose heating production is to be valued.
- the cold circuit 3 comprises a cold exchanger 30 for yielding the cold of a coolant circulating in the circuit. It also comprises, optionally, a bypass branch 31 combined with a three-way valve 32 for regulating the flow rate through the cold exchanger 30.
- the cold circuit 3 also comprises various temperature sensors, flow and pressure useful for controlling and measuring the performance of the system.
- the hot circuit 2 comprises a hot heat exchanger 20 for yielding the heat of the coolant circulating in the hot circuit 2. It also optionally comprises a branch branch 21 combined with a three-way valve 22 for regulating the flow through the hot heat exchanger 20. It is connected to the thermal machine 1 from a hot outlet connector 74c to a hot inlet connector 73c of the machine 1.
- the hot circuit 2 also comprises various sensors for temperature, flow and pressure. The terms hot and cold are relative to each other and do not assume a temperature level per se.
- the machine 1 comprises a base 5, a central shaft 4 fixed on the base
- the rotor 6 comprises an active bed 60 comprising magnetocaloric material.
- the active bed 60 is shaped to guide a heat transfer fluid between a cold end 600f on the cold distributor side 7f and a hot end 600c on the hot distributor side 7c axially offset.
- the hot and cold dispensers 7c, 7f are identical parts, although this is not an obligation for carrying out the invention, but makes it possible to produce only one part model. Thus the terms hot and cold are used to distinguish the place that each distributor occupies. Similarly, the suffixes c and f will be added to the references to explicitly designate the respective hot and cold side of the machine, the absence of suffix designating a characteristic indifferently on one side or the other.
- the distributor 7 comprises a first chamber 71 connected to an input connector 73 and a second chamber 72 connected to an output connector 74.
- the first chamber 71 is delimited by a partition wall 75, a first peripheral wall 76 and a first bottom wall 77 extending radially parallel to the partition wall 75, thus forming a first cylinder.
- the input connector 73 opens into the first chamber
- the second chamber 72 is delimited between the first peripheral wall 76, a second peripheral wall 78 coaxial with the first peripheral wall 76, the first bottom wall 77 and a second bottom wall 79 parallel to the first bottom wall 77.
- the second peripheral wall 78 and the second bottom wall 79 form a tank that includes the cylinder, the second chamber
- the second bottom wall 79 and the partition wall 75 are attached to the rest of the distributor 7 which is in one piece.
- the input connector 73 sealingly crosses said second bottom wall 79.
- the partition walls and the bottom 75, 77, 79 are drilled in their center and are fitted on the central shaft 4.
- a static O-ring for example makes it possible to seal between the wall considered and the central shaft 4.
- the ends of the peripheral walls 76, 78 opposite the bottom walls 77, 79, said connecting ends are substantially in the same plane and abut against the partition wall 75.
- the first peripheral wall 76 comprises bowls 760 extending to the second peripheral wall 78 and delimited by arches 761 connecting the first to the second peripheral wall 76, 78.
- the cuvettes 760 are regularly distributed so as to be opposite the first openings 751 made in the partition wall. separating 75 and communicating with the first chamber 71, alternating with second openings 752 formed in the partition wall communicating with the second chamber 72.
- the first and second openings 752 are distributed along a connecting ring and have the form of arcuate grooves.
- the output connector 74 is carried by the central shaft 4 which includes ducts 40 opening radially into the second chamber 72, between the bottom walls 77, 79.
- the rotor 6 comprises a hot flange 61c and a cold flange 61f rotatably mounted on the central shaft 4 and supporting the active bed 60 of magnetocaloric material respectively at the hot end 600c and the cold end 600f.
- Each flange 61 includes lights 610 for fluid communication between the active bed 60 and the respective distributor 7 through the connecting ring.
- the machine 1 further comprises first sealing means 16 rotating between each flange 61 and the central shaft 4, and second sealing means 17 rotating between each flange 61 and the adjacent distributor 7 beyond the ring fitting.
- the first sealing means 16 are typically a lip seal held by the flange 61 and bearing on the central shaft 4.
- the second sealing means 17 comprise a ring 171 fixed in periphery of the flange 61 and a lip seal 172 in sealing contact on the ring 171 carried by the partition wall 75 of the distributor 7, as shown in Figure 7.
- the flanges 61 are formed of a continuous web, so as to close the space between the partition walls 75 and the inside of the rotor 6.
- the active bed 60 comprises a body 601 of tubular shape, pierced with axial housing 602 through.
- the tubular body 601 is gripped by the flanges 61 which support it.
- Each housing 602 contains a stack 603 of parts of identical and constant section forming channels 6030 parallel to the axis of the central shaft 4.
- the stack 603 of parts first comprises non-active material parts forming a hot guide zone 6031c, parts made of magnetocaloric material forming a section of magnetocaloric material 6032 and again parts made of non-active material 6031 forming a cold guide zone 6031
- the stack 603 extends from one end to the other of the tubular body 601 and is trapped in the housing 602 by the flanges 61.
- Figure 6 shows an example of section of parts.
- the section comprises two parallel walls 604 connected by a plurality of partitions 605 delimiting the channels 6030 between them, the partitions 605 being substantially radial.
- the parts of the stack 603 in the active section 6032 are in different magnetocaloric materials whose Curie temperature evolves in a gradient and is higher on the hot side compared to the cold side.
- the gradient is obtained by the choice of the nature of the alloy constituting the magnetocaloric material.
- Curie temperatures range from 7 ° C on the cold side to 35 ° C on the warm side.
- the hot distributor 7c and the cold distributor 7f are respectively placed facing the hot and cold ends 600c, 600f along the connecting ring to provide or receive the coolant flowing in the active bed 60.
- the distributors 7 are oriented angularly such that each channel 6030 connects a first opening 751 communicating with the first chamber 71 of one of the distributors 7 to a second opening 752 communicating with the second chamber 72 of the other distributor.
- the magnetic means 8 are configured so as to subject the active bed 60 to an alternation of magnetic fields between a strong field and a weak field distributed over the perimeter of the active bed 60, and more precisely on the active areas 6032.
- the magnetic ring 8 comprises a central ring 81 and an outer ring 82, as shown in FIG. 4.
- the central ring 81 is fixed on the central shaft 4 and has an outside diameter fitted to the inside diameter of the body 601 of the bed.
- the outer ring 82 is fixed on the base 5.
- the central and outer rings 81, 82 are formed by the assembly of permanent magnets and ferromagnetic complementary parts in order to subject certain sectors S1 of the gap 83 between the ring.
- the magnetic means 8 provide the strong magnetic field at a fixed position relative to the distributors 7, so as to provide it to the channels 6030 connected to the first hot chamber 71c, so opposite the first hot openings 751c.
- the weak magnetic field is supplied to the channels 6030 connected to the first cold room 71 f.
- the drive means 9 comprise an electric motor, not shown, comprising a small pulley, and a transmission belt stretched between the small pulley and the body 601 of the rotor 6, in a space between the outer ring 82 and the distributor. 7 adjacent.
- the drive means 9 comprise two pulleys and two belts placed on either side of the outer ring 82.
- the motor could drive a pinion meshing with a ring gear made on the body 601.
- the machine 1 further comprises synchronization means 1 1 for synchronizing the coolant flow rate and the rotational speed of the rotor 6.
- the synchronization means 1 1 receive at least one fluid flow measurement D1 'in the circuit and is arranged to act on the speed of rotation of the motor 9, and therefore of the rotor 6.
- the synchronization means January 1 are adjusted so that the volume entering each of the channels 6030 when scrolling in front of one of the apertures 751, 752 substantially corresponds to the volume of said channel 6030.
- the hot circuit 2, the cold circuit 3, the first and second chambers 71, 72 and the channels 6030 are filled with a heat transfer fluid.
- the fluid may be water, optionally added with glycol to prevent freezing by working at temperatures below 0 ° C.
- the first and second sealing means 16, 17 make it possible to prevent the passage of fluid between the rotor 6 and the distributor 7.
- the fluid describes the next cycle. It is set in motion by the pump 31 to the cold inlet connector 73c, passes through the second cold chamber 72f to open into the first cold room 71 f, passes through the first openings 751 f to enter a part of the channels 6030 by the cold end 600f. After having passed through the channels 6030, the fluid leaves in the second hot chamber 72c through the second openings 752c, joins the central shaft 4 and then the outlet connector 74c and circulates in the hot circuit 2, the hot heat exchanger 20 of which. fluid then joins the pump 31 by a symmetrical path, from the hot circuit 2 to the cold circuit 3.
- the fluid that enters the cold end 600f migrates into one of the channels 6030, while said channel 6030 moves peripherally with the rotor 6, as shown by the arrow F1 in FIG. 9.
- the hot end 600c of the channel 6030 then passes from a second hot opening 752c in communication with the second hot chamber 72c to a first hot opening 751c in communication with the first hot chamber 71 c.
- the cold end 600f of the same channel 6030 then passes from a first cold opening 751 f in communication with the first cold room 71 f to a second cold opening 752f in communication with the second cold room 72f.
- the flow direction of the fluid in the channel 6030 is then reversed and most of the fluid which has entered the channel 6030 from the first cold chamber 71 has remained in the channel 6030 and then exits into the second cold chamber 72f.
- This operating characteristic makes it possible to limit the mixing of fluid at different temperatures and thus to optimize the efficiency of the machine 1.
- the parts of the stack 603 in the active section 6032 have a temperature gradient determined by the temperature difference between the fluid that enters the hot side and the cold side respectively.
- This temperature gradient oscillates between two levels depending on whether the magnetocaloric material is exposed to the magnetic field or not.
- the hot fluid enters the channel 6030 and cools down because the temperature level has been reduced by the suppression of the magnetic field.
- its temperature decreases during its progression in the active section 6032, because of the temperature gradient.
- each portion of material increases in temperature by taking up the energy yielded by the fluid.
- the coldest fluid is discharged at the same time to the second cold room 72f.
- the channel 6030 then enters the next sector in which the magnetic field is restored and the flow direction of the fluid is reversed.
- the parts of the stack 603 of the active section 6032 increase in temperature.
- the fluid in channel 6030 heats up receiving energy due to this temperature increase and comes out warmer than it entered.
- the cold fluid that enters the canal 6030 through the cold end 600f heats up by cooling the material and thereby transferring the energy to the warm side.
- the material temperature of the active section 6032 drops and the fluid that comes out of the cold side 600c warms the material by yielding energy and thus comes out colder than he did not enter.
- the invention is not limited to the embodiment described solely by way of example.
- the seal between the rotor 6 and the distributors 7, the constitution of the magnetocaloric bed and the synchronization between the flow rate and the speed of rotation of the rotor 6 could be implemented independently.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1457627A FR3024768B1 (en) | 2014-08-06 | 2014-08-06 | THERMAL MACHINE WITH MAGNETOCALORIC MATERIAL OF THE KIND REFRIGERATING MACHINE OR HEAT PUMP |
PCT/EP2015/067828 WO2016020327A1 (en) | 2014-08-06 | 2015-08-03 | Heat engine comprising magnetocaloric material of the refrigerating machine or heat pump type |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3177879A1 true EP3177879A1 (en) | 2017-06-14 |
Family
ID=51830518
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15748021.1A Withdrawn EP3177879A1 (en) | 2014-08-06 | 2015-08-03 | Heat engine comprising magnetocaloric material of the refrigerating machine or heat pump type |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3177879A1 (en) |
FR (1) | FR3024768B1 (en) |
WO (1) | WO2016020327A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1736719A1 (en) * | 2005-06-20 | 2006-12-27 | Haute Ecole d'Ingénieurs et de Gestion du Canton | Continuously rotary magnetic refrigerator or heat pump |
US8209988B2 (en) * | 2008-09-24 | 2012-07-03 | Husssmann Corporation | Magnetic refrigeration device |
FR2937182B1 (en) * | 2008-10-14 | 2010-10-22 | Cooltech Applications | THERMAL GENERATOR WITH MAGNETOCALORIC MATERIAL |
JP5267689B2 (en) * | 2011-04-26 | 2013-08-21 | 株式会社デンソー | Magnetic heat pump device |
-
2014
- 2014-08-06 FR FR1457627A patent/FR3024768B1/en active Active
-
2015
- 2015-08-03 EP EP15748021.1A patent/EP3177879A1/en not_active Withdrawn
- 2015-08-03 WO PCT/EP2015/067828 patent/WO2016020327A1/en active Application Filing
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2016020327A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR3024768B1 (en) | 2016-09-02 |
WO2016020327A1 (en) | 2016-02-11 |
FR3024768A1 (en) | 2016-02-12 |
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