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US 2011/0146939A1 Jun.23,2011 [0066] FIG.5Ashowsapartialsectionofadeviceaccord ingtotheinventionsimilartothatofFIGS. 3A and3B but used as part of a cooling system; [0067] FIG.5BisanendonvieWofthesectionofFIG.5A; ducts10andslots11intotheZeolitemolecularsieve8.Asthe [0068] FIG.6isaschematicdiagramofsuchacooling system; [0069] FIG.7isaschematicdiagramillustratingtheuseof a device according to the invention as part of a desalination system; [0070] FIG.8shoWsdeviceaccordingtotheinventionused in a desalination system and charged by a rotating magnetic ?eld; [0071] FIG.9shoWsaschematicinstallationforaheating system according to in Which desorption takes place under reducedpressureinvention;and [0072] FIG.10isacrosssectionshoWinginmoredetail inside of Zeolite thermal store of FIG. 9. [0073] InFIGS.1Aand1B,adeviceaccordingtothe invention used as a thermal storage device comprises a cylin drical container 1 having an inner Wall 2 made of extruded aluminiumsections.Theends(notshoWn)ofthecylinderare closed by aluminium caps. The container 1 is separated by a gap 3 from an insulating outer Wall 4. The gap 3 is ?lled With insulating material such as rock Wool. An extruded alu minium centralcore5hasapluralityofradialaluminium?ns 6 extruding to the inner Wall 2. Each ?n 6 has a number of aluminiumspines7extendingthelengthofthecylinderand formed as arcs around the central core 5. The region betWeen the inner Wall 2 and the central core 5 is ?lled With a Zeolite forming a Zeolite molecular sieve 8. The Zeolite knoWn as X13 isparticularlyef?cientinthisapplication.The con?gu rationofthe?ns6,spines7makesforgoodheattransfertothe centralcore5andtheZeolite8,thespines7forminga?ne mesh to contact the Zeolite molecular sieve 8. ItWill be seen that the combination of Zeolite 8, ?ns 6 and spines 7 forms a Zeolitematrix. [0074] Thecentralcoreitselfhasanumberofslots9onits peripheryinWhichthe?ns6aremounted.Closetothesurface of the core are a number of ducts 10 for Water vapour. The ducts10haveslots11totheZeolitemolecularsieve8,through Which Water vapour may pass. [0075] A seriesofheattransferpipes12runthelengthof the central core 5. For a system used in a domestic or light industrial situation, Water Would often be used as the heat transfer medium. In this situation the heat transfer pipes Would connect to a hot Water supply and/or a heat exchanger that is part of a central heating system. But there is no reason Why otherheattransfermediashouldnotbeused,including steamorairaspartoftheWarm airsupplyinanaircondi tioningsystem. [0076] Alongtheaxisofthecentralcoreisdisposedan electrical heater 13 connected to a source of electricity. In practicetheducts10areconnectedthroughtheendcapsof the cylinder, on one side via a non-return valve to a condenser and on the other side to a loW-pressure evaporator. Initially, the Zeolite molecular sieve 8 is fully charged With Water molecules. [0077] Theelectricheaterisconnectedtoitssupply.This heats the Zeolite molecular sieve 8 forcing the chemically absorbedWaterintheZeoliteoutasWatervapour,throughthe slots 11 and ducts 10 out of the cylinder. This Water vapour passesthroughanon-returnvalvetoacondenser(notshoWn). This charges the battery. After charging, Water is passed throughtheheattransferpipes12,coolingtheinteriorofthe WatervapourisabsorbedintotheZeolitemolecularsieveit combinesinanexothermicreactionWiththeZeolitereleasing heat, this heat release gradually discharges the thermal stor age device until no more Water vapour can be taken back into the Zeolite, at Which point discharge is complete. The heat thusreleasedistransferredviathespines7and?ngers6tothe central core 5 Where itheats Water passing through the heat transfer pipes 12. It can be seen that heat taken from the thermalstoragedevicebothduringcoolinganddischargeis available for use. [0078] Inafullsystem,itisunlikelythatasingledeviceas described Would be entirely satisfactory, as it can only be charging or discharging at any one time. Thus in FIG. 2 shoWs a schematic heating system that is more likely to be adopted in practice. In FIG. 2 a plurality of thermal batteries 20 of the kind shoWn in FIG. 1 is shoWn. The vapour duct 10 of each of the batteries 20 is connected to the combined condenser and evaporation unit 16, With loW pressure vapour capable of beingdraWnfromtheevaporator,andvapourforcedoutofthe cylinders being passed through a non-return valve to the condensing side of the unit. The heat transfer pipes of each thermalstoragedeviceareconnectedthroughacommon duct 17tothesystemoutput.Electricalenergyispassedthrougha control system 18 to be directed to the batteries being charged.Atthesametimechargedbatteriescanbedischarged to provide heat output to the duct 17. [0079] LatentheatfromthecondensationofWatervapour can be used for heating purposes. [0080] ItcanbeseenthatifthissystemisusedWitha variable and unpredictable energy source such as a Wind turbine,continuousoutputcanbeobtained,Whilstthecontrol systemsWitchesanumberofbatteriestochargeWhen inputis available. [0081] Thissystemisaneconomicsolutiontothermal energy. Itmay also be more reliable than existing systems overlongperiodsoftime.Incontrasttoconventionalstorage heaters, Which discharge as soon as they are Warm, the ther mal storage device Would only need to be discharged When there is a need for thermal energy in contrast to conventional storage heaters, Which discharge as soon as they are Warm. The input to such a system could be from a variety of sources, solar or a Wind turbine driven heat operating device. With large enough storage cylinders, substantial amounts of ther malenergycouldbestored(upto275KW percubicmeter). One optionWouldbetoconverttheoutputtoelectricity.Such converting devices do exist, such as heat engines coupled to generators.SteamturbinesandStirlingenginesareparticu larlysuitable. [0082] InFIGS.3Aand3Bathermalstoragedevice21 comprises a container 22 ?lled With a Zeolite molecular sieve 23. Pins 24 extend from the Wall of container 22 into a Zeolite molecular sieve 23 to help transmit heat into and out of the Zeolitemolecularsieve.A tube25runsWithinthecontainer andthroughthecontainer’sendcaps(notshoWn).A slot26 throughtheWallofthetube25alloWspassageofWatervapour into and out of the Zeolite molecular sieve 23 via the tube 25. Ducts 27 thermally connected to the container alloW the How ofaheattransfermedium. Formany applications,Wateris perfectlysatisfactoryastheheattransfermedium.Thermally coupled to the container is a thermal collector 28. In this cylinder.AnyWatervapourremaininginthecylinderisreab sorbed into the Zeolite molecular sieve 8, creating a vacuum. This vacuum draWs loW-pressure Water vapour through thePDF Image | ENERGY ABSORPTION AND RELEASE DEVICES AND SYSTEMS
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