EP3519750A1 - Tube à réservoir de matériau à changement de phase pour évaporateur, évaporateur et ensemble de climatisation associés - Google Patents
Tube à réservoir de matériau à changement de phase pour évaporateur, évaporateur et ensemble de climatisation associésInfo
- Publication number
- EP3519750A1 EP3519750A1 EP17787475.7A EP17787475A EP3519750A1 EP 3519750 A1 EP3519750 A1 EP 3519750A1 EP 17787475 A EP17787475 A EP 17787475A EP 3519750 A1 EP3519750 A1 EP 3519750A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- change material
- phase change
- evaporator
- tube
- cavities
- 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- Withdrawn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
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
- F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
- F28D1/0325—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another
- F28D1/0333—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D2020/0004—Particular heat storage apparatus
- F28D2020/0008—Particular heat storage apparatus the heat storage material being enclosed in plate-like or laminated elements, e.g. in plates having internal compartments
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D2020/0004—Particular heat storage apparatus
- F28D2020/0013—Particular heat storage apparatus the heat storage material being enclosed in elements attached to or integral with heat exchange conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
- F28D2021/0091—Radiators
- F28D2021/0096—Radiators for space heating
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Definitions
- Tube with phase change material tank for evaporator, evaporator and associated air conditioning assembly Tube with phase change material tank for evaporator, evaporator and associated air conditioning assembly.
- the present invention relates to a tube of material for phase change material for heat exchanger heat exchange beam, particularly in the field of thermal management in a motor vehicle.
- the heat exchangers generally comprise a bundle of parallel tubes formed of plates containing a first coolant, for example a refrigerant in the case of an air conditioning system evaporator.
- the beam is also traversed by a second coolant, for example a flow of air for the passenger compartment, sweeping the tubes whose surface, increased by the addition of interfering or spacers between the tubes, optimizes the heat exchange.
- phase change material associated with the tubes of the beam for the circulation of the first heat transfer fluid.
- Such exchangers for example in the case of an evaporator of an air conditioning circuit, make it possible to maintain the cooling of a passenger compartment of the vehicle during a given period of time, especially when the vehicle engine is stationary and does not moreover causes the refrigerant circulation compressor, in particular for vehicles equipped with an automatic engine shutdown system during short stops of the vehicle. In these periods of stopping the engine, the phase change material captures heat energy to the air passing through the evaporator so as to cool it.
- an evaporator for a vehicle air conditioning circuit comprising a heat exchange bundle provided with a set of refrigerant circulation tubes, a storage tank of phase change material being attached to the tubes. and an air passage being provided between the tubes and the cold storage tanks, in particular by protrusions and recessions formed between them.
- One of the aims of the present invention is to at least partially overcome the drawbacks of the prior art and to propose an improved tube of material with phase change for a more efficient use within a heat exchange bundle a heat exchanger.
- the present invention therefore relates to a tube for a heat exchange bundle of a vehicle heat exchanger, said tube comprising:
- At least one tank plate comprising cavities, said tank plate being configured to come together sealingly on one face of one of the two circulation plates so as to close the cavities, said cavities being projecting on the face of the reservoir plate so that a second heat transfer fluid can circulate between said cavities, said tube further comprising a phase change material stored in housings formed by said cavities, said phase change material having a solidification temperature of between 6 and 8 degrees Celsius.
- phase change material having these characteristics makes it possible to limit the excessive temperature variation at the outlet of the evaporator and thus gives the possibility of cycling to certain components of the air conditioning circuit. , such as the compressor, so as to reduce the consumption of the air conditioning loop.
- phase change material having such a solidification temperature allows the possibility of a bypass (or bypass) of the evaporator by a part of the flow passing through the air conditioning loop.
- the phase change material has a solidification onset temperature of between 7.5 and 8 degrees Celsius.
- the phase-change material has a melting point of between 7 and 9 degrees Celsius.
- the phase change material has a latent heat of fusion of between 130 kJ / kg.K and 250 kJ / kg.K
- the phase change material is a paraffin.
- the phase-change material is a fatty acid.
- the invention also relates to an evaporator for a motor vehicle air conditioning circuit, the evaporator comprising a plurality of tubes according to one of the embodiments presented above.
- the invention also relates to an air conditioning assembly for a motor vehicle, said assembly being traversed by an air flow, the assembly comprising at least one evaporator according to the invention, the air flow bypassing at least partially the evaporator.
- the flow of air leaving the evaporator is at a temperature between ⁇ and 12 degrees Celsius.
- the flow of air leaving the evaporator is at a temperature of between 1 degree and 12 degrees Celsius makes it possible to have a substantially stabilized temperature and thus to make it possible to circumvent, at least partially, the evaporator by the airflow and thus further reduce the consumption of the air conditioning loop.
- FIG. 1 shows a diagrammatic representation in perspective of an evaporator according to one embodiment of the invention
- FIG. 2 shows a schematic representation in perspective of a tube with a material reservoir with phase change according to a particular embodiment of the invention
- Figure 3 is a graph showing the state of the phase change material of the invention as a function of its temperature.
- the phase change material reservoir tube 1 comprises two circulation plates 3 and at least one reservoir plate 5.
- the two circulation plates 3 are configured to be assembled to one another in a sealed manner and to form at least one duct 31 in which a first coolant circulates between said circulation plates 3.
- the two circulation plates 3 are preferably identical and contiguous to one another in "mirror", which makes it possible to have only one type of circulation plate 3 to produce and thus allows to save money during production.
- the at least one tank plate 5 has in turn cavities 51 and is configured to come together sealingly on one side of one of the two circulation plates 3 so as to close the cavities 51 and form housings of the phase change material. These cavities 51 are projecting on one face of the tank plate 5 so that a second heat transfer fluid, for example a flow of air, can circulate between said cavities 51.
- a second heat transfer fluid for example a flow of air
- the tank plate is assembled on an outer face of one of the two circulation plates.
- tank plate would be made differently and would be attached to another face.
- phase change material reservoir tube 1 In order to produce the phase change material reservoir tube 1, there are only two different types of plates used, namely two circulation plates 3 and at least one reservoir plate 5. Such a design allows to limit the production of such a tank tube to these two types of plates, thus generating savings in production costs. In addition, because of this reduced number of plate types, the mounting is simplified.
- phase change material reservoir tube ⁇ An additional advantage of the phase change material reservoir tube ⁇ is that the phase change material is directly in contact with the circulation plate 3, which facilitates and improves the heat energy exchange between the first heat transfer fluid and the phase change material.
- the circulation plates 3 may also comprise recesses 32 preferably made by stamping in a homogeneous distribution over the entire circulation plate 3.
- the circulation plates 3 comprise an external face intended to be oriented towards either a reservoir plate 5 , or a heat exchange element with the second heat transfer fluid, such as a corrugated plate.
- Each circulation plate 3 comprises an internal face opposite to the external face from which each recess 32 extends so that their summit part is in contact with the adjacent circulation plate 3. According to a preferred embodiment, but not limiting , the recesses 32 are staggered on the circulation plate 3.
- each recess 32 Due to such a distribution, the inner face of each recess 32 is in the flow path of the first fluid defined by the conduit 31, while the outer face can form a local reserve of phase change material, thereby increasing their heat exchange. Since the outer face of the circulation plate 3 is provided with recesses 32, the latter form complementary reserves of phase-change material so that for a given space, a tube with a reservoir 5 of phase-change material is provided. such recesses 32 allow increased storage of phase change material. This has the effect of increasing the time during which the phase change material exchanges heat energy with the second fluid. In addition, since the recesses 32 form additional connections with the adjacent circulation plate 3, the mechanical strength of the phase change material reservoir tube 1 is increased.
- phase change material reservoir tube 1 may be used in an evaporator type heat exchanger which is adapted to receive a refrigerant fluid having a nominal pressure of approximately 15 bar.
- the phase change material tank tube 1 comprises a single tank plate 5, on one of its external faces in contact with the second heat transfer fluid. The other of its faces is in contact with a corrugated heat exchange plate with the second heat transfer fluid, such corrugated plate being sometimes called fin or spacer.
- the tube 1 may nevertheless comprise a tank plate with a reservoir of phase change material 1 on each of its outer faces in contact with the second heat transfer fluid.
- the phase change material reservoir tube 1 may comprise a common filling orifice of the projecting cavities 51 of the two tank plates 5.
- the protruding cavities 51 have a domed shape. These domes are more particularly staggered so that the second heat transfer fluid can flow between them.
- the projecting cavities 51 have an oblong shape.
- the projecting cavities 51 are then distributed in "V" with respect to the longitudinal axis A of the tank plate 5 as shown in FIG.
- This particular shape and distribution allows the phase change material reservoir tube 1 to contain a larger quantity of phase change material than for the dome shape and also allows the pressure drops of the second heat transfer fluid to be limited during its passage between the projecting cavities 51.
- the exchange tube 30 may be a tube provided with micro channels, such a tube being derived from the superposition of flat plates and a corrugated plate, the latter being sometimes referred to as internal spacer, said corrugated plate being then disposed between the two adjacent flat plates to form the micro-channels.
- the exchange tube 30 may more particularly be composed of two circulation plates 3, as previously described, assembled to one another in a sealed manner.
- the heat exchange bundle 100 here comprises, distributed over its entire length, three tubes of phase change material tank 1. Two of these phase change material tank tubes 1 comprise a tank plate 5 on each of their external faces in contact with the second heat transfer fluid.
- the third tube containing material of phase change material 1 has only a single tank plate 5 on one of its outer faces in contact with the second heat transfer fluid.
- the total number of phase change material tank tubes 1 and reservoir plates 5 present within a heat exchange bundle 100 is a function of its size and length. The longer the heat exchange bundle 100, the greater this number is in order to ensure a cooling of the second heat transfer fluid continues and even if the first heat transfer fluid circulates more in said beam, for example during a shutdown of the compressor.
- the tube containing phase change material 1 because it is composed of two circulation plates 3 and at least one tank plate 5, allows simple assembly and inexpensive manufacture.
- the phase-change material is directly in contact with the circulation plate 3 which facilitates and improves heat energy exchange between the first heat transfer fluid and the phase change material.
- a phase change material is chosen for which the melting temperature is lowered so as to allow the evaporation of the evaporator by a part of the air flow. This bypass reduces the consumption of the air conditioning loop as a whole.
- the temperature of the air flow leaving the evaporator must be between 4 degrees Celsius and 12 degrees Celsius.
- the saturation temperature of the coolant conventionally used is at about o degrees Celsius.
- phase change material sufficiently high to be compatible with the temperature of the heat transfer fluid when the air conditioning assembly is operating, and low enough for the phase change material to be be liquefied before the airflow temperature reaches 12 degrees Celsius.
- the phase change material can be selected in accordance with FIG. plurality of factors.
- the phase-change material therefore has a solidification temperature of between 6 and 8 degrees Celsius. It is also possible to implement, according to a particular embodiment, a phase-change material which has a melting point of between 7 and 9 degrees Celsius. In a particular embodiment of the invention, which corresponds to the embodiment detailed here, the phase change material has a latent heat of fusion of between 130 kJ / kg.K and 250 kJ / kg.K.
- phase-change material it will be possible for example to choose a paraffin.
- phase change material among the fatty acids.
- This phase-change material may for example be composed of an ester, such as tetradecanoic acid-methylethyl ester. In a variant, it may be composed of 99% of tetradecanoic acid-methylethyl ester, to which one or more additives are added.
- the solidification of the phase-change material can preferably take place during a braking phase of the vehicle, this being made possible by an increase in the displacement of a compressor, since the consumption of a compressor is zero during a braking phase and a braking phase often precedes a stopping phase of the vehicle.
- This air conditioning assembly for a motor vehicle, traversed by a flow of air may comprise, in addition to the evaporator, a compressor and a shutter circuit implemented within a complete air conditioning device.
- the presence of the compressor allows the airflow to at least partially bypass the evaporator. It should be noted that the air flow is, at the outlet of the evaporator, at a temperature between 1 and 12 degrees Celsius.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning For Vehicles (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1659225A FR3056725B1 (fr) | 2016-09-28 | 2016-09-28 | Tube a reservoir de materiau a changement de phase pour evaporateur, evaporateur et ensemble de climatisation associes. |
PCT/FR2017/052606 WO2018060601A1 (fr) | 2016-09-28 | 2017-09-27 | Tube à réservoir de matériau à changement de phase pour évaporateur, évaporateur et ensemble de climatisation associés |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3519750A1 true EP3519750A1 (fr) | 2019-08-07 |
Family
ID=57750131
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17787475.7A Withdrawn EP3519750A1 (fr) | 2016-09-28 | 2017-09-27 | Tube à réservoir de matériau à changement de phase pour évaporateur, évaporateur et ensemble de climatisation associés |
Country Status (5)
Country | Link |
---|---|
US (1) | US20200132379A1 (fr) |
EP (1) | EP3519750A1 (fr) |
CN (1) | CN109923364A (fr) |
FR (1) | FR3056725B1 (fr) |
WO (1) | WO2018060601A1 (fr) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2861166B1 (fr) * | 2003-10-21 | 2006-11-24 | Valeo Climatisation | Echangeur de chaleur utilisant un fluide d'accumulation |
US6964178B2 (en) * | 2004-02-27 | 2005-11-15 | Denso Corporation | Air conditioning system for vehicle |
FR2945859B1 (fr) * | 2009-05-19 | 2011-06-17 | Valeo Systemes Thermiques | Dispositif d'echange thermique contenant un materiau de stockage thermique |
US20120042687A1 (en) * | 2010-08-23 | 2012-02-23 | Showa Denko K.K. | Evaporator with cool storage function |
JP5868088B2 (ja) * | 2011-09-15 | 2016-02-24 | 株式会社ケーヒン・サーマル・テクノロジー | 車両用空調装置のクーリングユニット |
FR3014183B1 (fr) * | 2013-11-29 | 2019-05-17 | Valeo Systemes Thermiques | Echangeur thermique notamment pour vehicule automobile, procede de fabrication correspondant, et utilisation d'un materiau a changement de phase associee |
FR3025596B1 (fr) * | 2014-09-08 | 2016-12-23 | Valeo Systemes Thermiques | Tube a reservoir de materiau a changement de phase pour echangeur de chaleur |
-
2016
- 2016-09-28 FR FR1659225A patent/FR3056725B1/fr active Active
-
2017
- 2017-09-27 US US16/337,252 patent/US20200132379A1/en not_active Abandoned
- 2017-09-27 EP EP17787475.7A patent/EP3519750A1/fr not_active Withdrawn
- 2017-09-27 WO PCT/FR2017/052606 patent/WO2018060601A1/fr unknown
- 2017-09-27 CN CN201780067381.7A patent/CN109923364A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
FR3056725B1 (fr) | 2018-11-30 |
CN109923364A (zh) | 2019-06-21 |
WO2018060601A1 (fr) | 2018-04-05 |
US20200132379A1 (en) | 2020-04-30 |
FR3056725A1 (fr) | 2018-03-30 |
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