SE543433C2 - An electric power-generating device and method of operating such a device - Google Patents

An electric power-generating device and method of operating such a device

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Publication number
SE543433C2
SE543433C2 SE1950733A SE1950733A SE543433C2 SE 543433 C2 SE543433 C2 SE 543433C2 SE 1950733 A SE1950733 A SE 1950733A SE 1950733 A SE1950733 A SE 1950733A SE 543433 C2 SE543433 C2 SE 543433C2
Authority
SE
Sweden
Prior art keywords
container
liquid
branch
wall
electric power
Prior art date
Application number
SE1950733A
Other languages
Swedish (sv)
Other versions
SE1950733A1 (en
Inventor
Sigvard Weisbjerg
Original Assignee
Sigvard Weisbjerg
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sigvard Weisbjerg filed Critical Sigvard Weisbjerg
Priority to SE1950733A priority Critical patent/SE543433C2/en
Priority to PCT/SE2020/050568 priority patent/WO2020256620A1/en
Publication of SE1950733A1 publication Critical patent/SE1950733A1/en
Publication of SE543433C2 publication Critical patent/SE543433C2/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • F01K27/005—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for by means of hydraulic motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/04—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for the fluid being in different phases, e.g. foamed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B17/00—Other machines or engines
    • F03B17/06—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2220/00—Application
    • F05B2220/20—Application within closed fluid conduits, e.g. pipes
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Catching Or Destruction (AREA)

Abstract

An electric power-generating device, comprising a first container (1), a second container (2), a first channel (3), extending from the first container (1) to the second container, a second channel (5), extending from the first channel (3) or from the first container (1) to the second container, said second channel having a first branch (6) and a second branch (7), wherein each of said first branch and second branch ends in the second container, and a first nozzle (9) arranged at the end of the first branch ending in the second container, and a second nozzle (10) arranged at the end of the second branch ending in the second container. The first nozzle sprays finely dispersed droplets of a liquid that hits a first wall (16) of the second container, and the second nozzle sprays finely dispersed droplets of a liquid into an open space in the second container.

Description

An electric power-generating device and method of operatingsuch a device TECHNICAL FIELD The present invention relates to an electric power-generatingdevice, comprising: a first container, a second container, a firstchannel, extending from the first container to the secondcontainer, an electric power generator, arranged so as togenerate electric power as a result of a flow of a liquid betweenthe first and second container in said first channel, a secondchannel, extending from one of the first channel and the firstcontainer to the second container, said second channel having afirst branch and a second branch, wherein each of said firstbranch and second branch ends in the second container, a pumparranged to pump a liquid in said second channel in a directiontowards the second container, a first nozzle arranged at the endof the first branch that ends in the second container, a secondnozzle arranged at the end of the second branch that ends in thesecond container, and a valve arrangement, configured to controla flow of liquid in the first branch and the second branchrespectively.
The present invention also relates to a method of operating sucha device.
BACKGROUND AND PRIOR ART DE 102011101665 A1 discloses an electric power-generatingdevice similar to the electric power-generating device definedhereinabove and in the preamble of claim 1 of the presentapplication. ln DE 102011101665 A1 electric power is generatedby the disclosed device as heat is exchanged between a secondcontainer and a liquid present in the second container as well asbetween a heat-exchanger arranged inside the second containerand liquid sprayed onto that heat-exchanger, such that vapour isgenerated in the container and the liquid present therein is forced to flow towards a first container. An electric power generator isformed by a hydraulic motor provided in a first channel betweenthe two containers and an electric generator/motor connected tothe hydraulic motor. The electric power generator generateselectric power when the liquid is forced by the vapour pressure inthe direction from the second container to the first container, andacts as a pump for pumping liquid in the opposite direction duringa subsequent condensing phase during which the vapourcondenses in the second container and the pressure is reducedtherein as a result thereof. During the condensing phase, finelydispersed liquid may be sprayed into the second container.
The vaporisation and condensation cycle disclosed in DE102011101665 A1 is a relatively slow process. lt is an object ofthe present invention to present an alternative device and amethod that enables a more rapid cycle.
SUMMARY The object of the invention is achieved by means of an electricpower-generating device, comprising: a first container, a secondcontainer, a first channel, extending from the first container to thesecond container, an electric power generator, arranged so as togenerate electric power as a result of a flow of a liquid betweenthe first and second container in said first channel, a secondchannel, extending from one of the first channel and the firstcontainer to the second container, said second channel having afirst branch and a second branch, wherein each of said firstbranch and second branch ends in the second container, a pumparranged to pump a liquid in said second channel in a directiontowards the second container, a first nozzle arranged at the endof the first branch that ends in the second container, a secondnozzle arranged at the end of the second branch that ends in thesecond container, and a valve arrangement, configured to controla flow of liquid in the first branch and the second branchrespectively, said electric power-generating device being characterised in that the first nozzle is directed so as to spray aliquid towards a first wall of the second container such that finelydispersed droplets of said liquid hits said first wall, and in that thesecond nozzle is directed so as to spray finely dispersed dropletsof a liquid into an open space in the second container. The liquidmay be any liquid suitable for the purpose, for example water.
According to one embodiment, the first container is an opencontainer, while the second container is a closed container inwhich a pressure may be built up due to vaporisation therein.
According to one embodiment, the electric power generatorcomprises turbine arranged in the first channel.
According to one embodiment, the electric power generatorcomprises a linear generator.
According to one embodiment, the valve arrangement comprisesa first control valve arranged in the first branch, and a secondcontrol valve arranged in the second branch.
According to one embodiment, the electric power-generatingdevice comprises a control unit configured to control theoperation of the valve arrangement.
According to one embodiment, the electric power-generatingdevice comprises a sensor for sensing a liquid level in the secondcontainer wherein the control unit is configured to open the firstcontrol valve as a response to the liquid level being above apredetermined first liquid level in the second container.
According to one embodiment, the electric power-generatingdevice comprises a sensor for sensing a liquid level in the secondcontainer, wherein the control unit is configured to open thesecond control valve as a response to the liquid level being belowa predetermined second level in the second container.
According to one embodiment, the electric power-generatingdevice comprises means for heating said wall from outside thesecond container. The means for heating may comprise anysuitable heater device, for example a burner.
According to one embodiment, the second container comprises abottom wall, one or more sidewalls and top wall, wherein said firstwall is the top wall of the second container. At least one,preferably all, of the bottom wall and the sidewall may preferablybe provided with a thermal insulation on the outside thereof, orbe made of a material having lower thermal conductivity than thematerial of said first wall.
According to one embodiment, the electric power-generatingdevice comprises a cooling device for cooling liquid in saidsecond channel, said cooling device being arranged in the secondbranch.
According to one embodiment, the electric power-generatingdevice comprises -a third channel, extending from one of the first channel and thesecond container to the first container, said third channel havinga third branch and a fourth branch, wherein each of said thirdbranch and fourth branch ends in the first container, -a second pump arranged to pump a liquid in said third channelin a direction towards the first container, -a third nozzle arranged at the end of the third branch that endsin the first container, -a fourth nozzle arranged at the end of the fourth branch that endsin the first container, -wherein the valve arrangement is configured to control a flow ofliquid in the third branch and the fourth branch respectively, andwherein the third nozzle is directed so as to spray a liquid towardsa first wall of the first container such that finely dispersed dropletsof said liquid hits said first wall, and wherein the fourth nozzle is directed so as to spray finely dispersed droplets of a liquid intoan open space in the first container. ln such embodiments both the first and the second containers areclosed containers in which an elevated pressure can be built updue to vaporisation therein.
According to one embodiment, in which the first container isprovided for vaporisation and condensation as disclosedhereinabove and hereinafter, the first container comprises abottom wall, one or more sidewalls and top wall, wherein said firstwall is the top wall of the first container. At least one, preferablyall, of the bottom wall and the sidewall may preferably be providedwith a thermal insulation on the outside thereof, or be made of amaterial having lower thermal conductivity than the material ofsaid first wall.
According to one embodiment, the electric power-generatingdevice comprises a control unit for controlling the operation of thevalve arrangement such that it opens for liquid flow through thefirst branch while closing the third branch, and such that it opensfor flow through the third branch while closing the first branch,and such that it opens for liquid flow through the second branchwhile closing the fourth branch, and such that it opens for liquidflow through the fourth branch while closing the second branch.
According to one embodiment, the valve arrangement comprisesa third control valve provided in the third branch and a fourthcontrol valve provided in fourth branch.
According to one embodiment, the electric power-generatingdevice comprises a cooling device for cooling liquid in said thirdchannel, said cooling device being arranged in the fourth branch The object of the invention is also achieved by means of a methodof operating an electric power-generating device according to the present invention, said method being characterised by followingsteps: a) providing a liquidcontainer, b) identifying a predetermined first level L1 and a predeterminedsecond level L2 in the second container, the first level L1 beingabove the second level L2, c) heating said first wall of the second container from outside thesecond container, d) spraying liquid from the first nozzle onto the first wall when thefirst wall has reached a predetermined temperature at which thesprayed liquid hitting the first wall is transformed to vapour, suchthat liquid flows from the second container to the first containerthrough the first channel as a consequence of an increasedpressure in the second container, e) terminating spraying from the first nozzle when the liquid isbelow said first predetermined second level in the secondcontainer, and spraying liquid into said open space with saidsecond nozzle, such that the vapour is condensed into liquid asconsequence thereof, followed by f) once again spraying liquid through said first nozzle onto thefirst wall provided that the first wall has a temperature equal to orabove said predetermined temperature and that the liquid level Lis above said predetermined first level L1. Steps e) and f) arethen repeated during continued operation. in the first container and the second According to one embodiment, the method comprises the furthersteps of: g) heating said first wall of the first container from outside the firstcontainer, h) spraying liquid from the third nozzle onto the first wall of thefirst container when said first wall has reached a predeterminedtemperature at which the sprayed liquid hitting the first wall istransformed to vapour, such that liquid flows from the firstcontainer to the second container through the first channel as aconsequence of an increased pressure in the first container, i) terminating spraying from the third nozzle when the liquid isabove the predetermined first level L1, and spraying liquid intosaid open space in the first container with said fourth nozzle, suchthat the vapour in the first container is condensed into liquid asconsequence thereof, followed by j) once again spraying liquid through said third nozzle onto saidfirst wall provided that said first wall has a temperature equal toor above said predetermined temperature and that the liquid levelin the second container is above said predetermined first level L1,-wherein spraying from the first and fourth nozzles is performedsimultaneously and spraying from the second and third nozzles isperformed simultaneously. Steps i) and j) are repeated duringcontinued operation.
BRIEF DESCRIPTION OF THE DRAWING Fig. 1 is a schematic representation of a first embodiment of anelectric power-generating device according to the presentinvention in during a vaporisation stage, Fig. 2 is the electric power-generating device of fig. 1 in acondensation phase, Fig. 3 is a schematic representation of a second embodiment ofan electric power-generating device according to the presentinvention in during a vaporisation stage, and Fig. 4 is the electric power-generating device of fig. 3 in acondensation phase, DETAILED DESCRIPTION Fig. 1 shows an embodiment of an electric power-generatingdevice according to the invention. The electric power-generatingdevice comprises a first container 1, a second container 2, and afirst channel 3, extending from the first container 1 to the second container 2. There is also an electric power generator 4, arrangedso as to generate electric power as a result of a flow of a liquidbetween the first and second containers 1, 2 in said first channel3. The electric power generator 4 may comprise any suitabledevice able of transforming the power of a flow of liquid intoelectric power. According to one embodiment, it comprises aturbine provided in the first channel 3. lt may, as an alternative,comprise a linear generator provided either in the first channel 3or in any of the first container 1 and the second container 2. Theliquid may be any liquid suitable for the purpose, for examplewater.
The electric power-generating device further comprises a secondchannel 5, extending from the first container 1 to the secondcontainer 2, said second channel 5 having a first branch 6 and asecond branch 7, wherein each of said first branch 6 and secondbranch 7 ends in the second container 2. There is also a pump 8arranged in the second channel 5 to pump a liquid in said secondchannel 5 in a direction towards the second container 2. Thedevice further comprises a first nozzle 9 arranged at the end ofthe first branch 6 that ends in the second container 2, and asecond nozzle 10 arranged at the end of the second branch 7 thatends in the second container 2.
The electric power-generating device further comprises a valvearrangement 11, 12 configured to control a flow of liquid in thefirst branch 6 and the second branch 7 respectively. The valvearrangement comprises a first control 11 valve arranged in thefirst branch 6, and a second control valve 12 arranged in thesecond branch 7. There is also provided a control unit 13configured to control the operation of the first and second controlvalves11, 12.
The electric power-generating device further comprises a sensor14 for sensing a liquid level in the second container 2, whereinthe control unit 13 is configured to open the first control valve 11 as a response to input from said sensor 14 telling that the liquidlevel being above a predetermined first liquid level L1 in thesecond container 2.
The electric power-generating device further comprises a sensorfor sensing 15 a liquid level in the second container 2, whereinthe control unit 13 is configured to open the second control valve12 as a response to the liquid level being below a predeterminedsecond level L2 in the second container 2.
The first nozzle 9 is directed so as to spray a liquid towards a firstwall 16 of the second container 2 such that finely disperseddroplets of said liquid hits said first wall 16. This is shown in fig.1. The second nozzle 10 is directed so as to spray finelydispersed droplets of a liquid into an open space in the secondcontainer 2 for the purpose of initiating a condensation phase inwhich vapour present in the second container condenses intoliquid. This is shown in fig. 2.
The second container 2 comprises a bottom wall 17, one or moresidewalls 18 and top wall 16, wherein the first wall 16 is the topwall 16 of the second container 2. The bottom wall 17 and thesidewalls 18 are provided with thermal insulation (not shown).
The electric power-generating device further comprises means 19for heating said first 16 wall from outside the second container 2.The heating means 19 may comprise a burner, a solar heatdevice, or any device from which heat can be generated andtransferred to the first wall 16.
For the purpose of lowering the temperature of liquid to besprayed from the second nozzle 10 for condensing purposes,there is provided a cooling device 20 in the second branch 7. Thecooling device 20 may comprise any suitable kind of heatexchanger configured to transfer heat from the hot liquid in thesecond branch 7.
According to one embodiment, the electric power-generatingdevice shown in figs. 1 and 2 is operated by performing thefollowing steps: a) providing a liquid in the first container 1 and the secondcontainer 2, b) identifying a predetermined first level L1 and a predeterminedsecond level L2 in the second container 2, the first level L1 beingabove the second level L2, c) heating said first wall 16 of the second container 2 from outsidethe second container 2 by means of the heating means 19, d) opening the first control valve 11, thereby spraying liquid fromthe first nozzle 9 onto the first wall 16 when the first wall 16 hasreached a predetermined temperature at which the sprayed liquidhitting the first wall 16 is transformed to vapour, such that liquidflows from the second container 2 to the first container 1 throughthe first channel 3 as a consequence of an increased pressure inthe second container 2, e) closing the first control valve 11, thereby terminating sprayingfrom the first nozzle 9 when the liquid level L is below saidpredetermined second level L2 in the second container 2, andopening the second control valve 12, thereby spraying liquid intosaid open space with said second nozzle 10, and, f) provided that the first wall 16 has a temperature equal to orabove said predetermined temperature and that the liquid level Lis above the first predetermined level L1, the second control valve12 is once again closed and the first valve 11 is opened. Thevaporisation and condensation cycle defined in steps e)-f) will berepeated throughout the operation of the device.
For the purpose of enabling the method, a temperature sensor formeasuring the temperature of the first wall 16 may be provided,such that the control unit 13 may obtain temperature data fromsaid temperature sensor. 11 Figs.3 and 4 show a further embodiment of the electric power-generating device according to the invention, wherein the devicefurther comprises -a third channel 21, extending from the first channel 3 to the firstcontainer, said third channel having a third branch 22 and a fourthbranch 23, wherein each of said third branch 22 and fourth branch23 ends in the first container 1, -a second pump 24 arranged to pump a liquid in said third channel21 in a direction towards the first container 1, -a third nozzle 25 arranged at the end of the third branch 22 thatends in the first container 1, -a fourth nozzle 26 arranged at the end of the fourth branch 23that ends in the first container 1.
The valve arrangement comprises a third control valve 27provided in the third branch 22 and a fourth control valve 28provided in fourth branch 23. The third and fourth control valves27, 28 are controlled by the control unit 13 and they areconfigured to control a flow of liquid in the third branch 22 andthe fourth branch 24 respectively. The third nozzle 25 is directedso as to spray a liquid towards a first wall 29 of the first container1 such that finely dispersed droplets of said liquid hits said firstwall 29, and the fourth nozzle 26 is directed so as to spray finelydispersed droplets of a liquid into an open space in the firstcontainer 1.
There is provided a means 30 for heating the first wall 29 of thefirst container 1 from outside the first container 1. The firstcontainer 1 structurally corresponds to the second container 2 asdisclosed with regard to figs. 1 and 2. The heating means 30 maycorrespond to the heating means 19 for heating the first wall 16of the second container, or may be different with regard to thelatter. The functionality of the first container 1 is however to bethe same as that of the second container 2 as describedhereinabove, i.e. it will perform a cycle of vaporisation andcondensation such that the liquid is forced to flow in the first 12 channel between the first container 1 and the second container 2.There is also provided a cooling device 31 in the fourth branch 24for the purpose of cooling liquid to be injected into the firstcontainer 1 for the purpose of initiating rapid condensationtherein. Said cooling device 31 may structurally and functionallycorrespond to the cooling device 20 arranged in the secondbranch 7.
With reference to fig. 3, the control unit 13 for controlling theoperation of the valve arrangement comprising the first, second,third and fourth control valves 11, 12, 27, 28 is configured to openfor liquid flow through the first branch 6 while closing the thirdbranch 22. The second control valve 12 is closed and the fourthcontrol valve 28 is open. Thereby, vaporisation is assumed to takeplace in the second container 2 while condensation is assumedto take place in the first container 1. Liquid is forced from thesecond container to the first container.
Fig. 4 shows a subsequent stage in which he first control valve11 is closed, the second control valve 12 is open, the third controlvalve 26 is open and the fourth control valve 28 is closed.Vaporisation takes place in the first container 1 whilecondensation takes place in the second container 1, and liquid isforced from the first container 1 to the second container 2.Information regarding the liquid level in at least one of thecontainers may be used as input to the control unit 13, whereinthe latter is configured to control the timing of the opening andclosure of each of the first, second, and fourth control valves 11,12, 27,28 at least partly on basis of such input. The sensors 14,15 used for this purpose are therefore included by way of examplealso in the second embodiment shown in figs. 3 and 4.
According to one embodiment, the electric power-generatingdevice shown in figs. 3 and 4 is operated by performing thefollowing further steps, as compared to the embodiment shown infigs. 1 and 2: 13 g) heating said first wall 29 of the first container 1 from outsidethe first container 1 by means of the heating means 30, h) spraying liquid from the third nozzle 25 onto the first wall 29 ofthe first container 1 when said first wall 29 has reached apredetermined temperature at which the sprayed liquid hitting thefirst wall 29 is transformed to vapour, such that liquid flows fromthe first container 1 to the second container 2 through the firstchannel 3 as a consequence of an increased pressure in the firstcontainer 1, i) terminating spraying from the third nozzle 25 when the liquid isabove the predetermined first level L1 in the second container 2,and spraying liquid into said open space in the first container 1with said fourth nozzle 26, such that the vapour in the firstcontainer 1 is condensed into liquid as consequence thereof,followed by j) once again spraying liquid through said third nozzle 25 ontosaid first wall 29 of the first container 1 provided that said firstwall 29 has a temperature equal to or above said predeterminedtemperature and that the liquid level L in the second container isabove said predetermined first level L1, -wherein spraying from the first and fourth nozzles is performedsimultaneously and spraying from the second and third nozzles isperformed simultaneously, and k) repetition of steps i) and j), Steps e) and j) are performed simultaneously, and steps f) and i)are performed simultaneously throughout the operation of thedevice.

Claims (15)

1. An electric device,-a first container (1),-a second container (2), -a first channel (3), extending from the first container (1) to thesecond container (2), -an electric power generator (4), arranged so as to generateelectric power as a result of a flow of a liquid between the firstand second container (1, 2) in said first channel (3), -a second channel (5), extending from one of the first channel (3)and the first container (1) to the second container (2), said secondchannel (5) having a first branch (6) and a second branch (7),wherein each of said first branch (6) and second branch (7) endsin the second container (2), -a pump (8) arranged to pump a liquid in said second channel (5)in a direction towards the second container (2), -a first nozzle (9) arranged at the end of the first branch (6) thatends in the second container (2), -a second nozzle (10) arranged at the end of the second branch(7) that ends in the second container (2), -a valve arrangement, configured to control a flow of liquid in thefirst branch (6) and the second branch (7) respectively, saidelectric power-generating device being characterised in that thefirst nozzle (9) is directed so as to spray a liquid towards a firstwall (16) of the second container (2) such that finely disperseddroplets of said liquid hits said first wall (16), and in that thesecond nozzle (10) is directed so as to spray finely disperseddroplets of a liquid into an open space in the second container(2), and wherein the device comprises means (19) for heating saidfirst wall (16) from outside the second container (2). power-generating comprising:
2. An electric power-generating device according to claim 1,characterised in that the electric power generator (4) comprisesa turbine arranged in the first channel (3).
3. An electric power-generating device according to claim 1,characterised in that the electric power generator (4) comprisesa Iinear generator.
4. An electric power-generating device according to any one ofclaims 1-3, characterised in that the valve arrangementcomprises a first control valve (11) arranged in the first branch(6), and a second control valve (12) arranged in the secondbranch (7).
5. An electric power-generating device according to any one ofclaims 1-4, characterised in that it comprises a control unit (13)configured to control the operation of the valve arrangement.
6. An electric power-generating device according to claim 5,characterised in that it comprises a sensor (14) for sensing aliquid level in the second container (2) and that the control unit(13) is configured to open the first control valve (11) as aresponse to the liquid level being above a predetermined firstliquid level L1 in the second container (2).
7. An electric power-generating device according to claim 5,characterised in that it comprises a sensor (15) for sensing aliquid level in the second container (2) and that the control unit(13) is configured to open the second control valve (12) as aresponse to the liquid level being below a predetermined secondlevel L2 in the second container (2).
8. An electric power-generating device according to any one ofclaims 1-7, characterised in that the second container (2)comprises a bottom wall (17), one or more sidewalls (18) and topwall and that said first wall (16) is the top wall of the secondcontainer (2).
9. An electric power-generating device according to any one ofclaims 1-8, characterised in that it comprises a cooling device (20) for cooling liquid in said second channel (5), said coolingdevice (20) being arranged in the second branch (7).
10. An electric power-generating device according to any one ofclaims 1-9, characterised in that it comprises -a third channel (21), extending from one of the first channel (3)and the second container (2) to the first container (1), said thirdchannel (21) having a third branch (22) and a fourth branch (23),wherein each of said third branch (22) and fourth branch (23)ends in the first container (1), -a second pump (24) arranged to pump a liquid in said thirdchannel (21) in a direction towards the first container (1),-a third nozzle (25) arranged at the end of the third branch (22)that ends in the first container (1), -a fourth nozzle (26) arranged at the end of the fourth branch (23)that ends in the first container (1), -wherein the valve arrangement is configured to control a flow ofliquid in the third branch (22) and the fourth branch (23)respectively, and wherein the third nozzle (25) is directed so asto spray a liquid towards a first wall (29) of the first container (1)such that finely dispersed droplets of said liquid hits said first wall(29), and wherein the fourth nozzle (26) is directed so as to sprayfinely dispersed droplets of a liquid into an open space in the firstcontainer (1).
11. An electric power-generating device according to claim 10,characterised in that it comprises a control unit (13) forcontrolling the operation of the valve arrangement such that itopens for liquid flow through the first branch (6) while closing thethird branch (22), and such that it opens for flow through the thirdbranch (22) while closing the first branch (6), and such that itopens for liquid flow through the second branch (7) while closingthe fourth branch (23), and such that it opens for liquid flowthrough the fourth branch (23) while closing the second branch (7)-
12. An electric power-generating device according to claim 10 or11, characterised in that the valve arrangement comprises athird control valve (27) provided in the third branch (22) and afourth control valve (28) provided in fourth branch (23).
13. , An electric power-generating device according to any one ofclaims 10-12, characterised in that it comprises a cooling device(31) for cooling liquid in said third channel, said cooling device(31) being arranged in the fourth branch (23).
14. A method of operating an electric power-generating deviceaccording to any one of claims 1-13, characterised in thefollowing steps: a) providing a liquid in the first container (1) and the secondcontainer (2), b) identifying a predetermined first level L1 and a predeterminedsecond level L2 in the second container (2), the first level L1being above the second level L2, c) heating said first wall (16) of the second container (2) fromoutside the second container (2), d) spraying liquid from the first nozzle (9) onto the first wall (16)of the second container (2) when the first wall (16) has reached apredetermined temperature at which the sprayed liquid hitting thefirst wall (16) is transformed to vapour, such that liquid flows fromthe second container (2) to the first container (1) through the firstchannel (3) as a consequence of an increased pressure in thesecond container (2), e) terminating spraying from the first nozzle (9) when the liquid isbelow said first predetermined second level L2 in the secondcontainer (2), and spraying liquid into said open space with saidsecond nozzle (10), such that the vapour is condensed into liquidas consequence thereof, followed by f) once again spraying liquid through said first nozzle (9) onto thefirst wall (16) provided that the first wall (16) has a temperatureequal to or above said predetermined temperature and that theliquid level is above said predetermined first level L1.
15. A method according to claim 14, characterised in that theelectric power-generating device is a device according to any ofclaims 10-13, and in that the method comprises the further stepsof g) heating said first wall (29) ofthe first container (1) from outsidethe first container (1 ), h) spraying liquid from the third nozzle (25) onto the first wall (29)of the first container (1) when said first wall has reached apredetermined temperature at which the sprayed liquid hitting thefirst wall is transformed to vapour, such that liquid flows from thefirst container (1) to the second container (2) through the firstchannel (3) as a consequence of an increased pressure in thefirst container (1), i) terminating spraying from the third nozzle (25) when the liquidis above the predetermined first level L1, and spraying liquid intosaid open space in the first container (1) with said fourth nozzle(26), such that the vapour in the first container (1) is condensedinto liquid as consequence thereof, followed by j) once again spraying liquid through said third nozzle (25) ontosaid first wall (29) provided that said first wall (29) has atemperature equal to or above said predetermined temperatureand that the liquid level in the second container (2) is above saidpredetermined first level L1, -wherein spraying from the first and fourth nozzles (9, 26) isperformed simultaneously and spraying from the second and thirdnozzles (10, 25) is performed simultaneously.
SE1950733A 2019-06-17 2019-06-17 An electric power-generating device and method of operating such a device SE543433C2 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3803847A (en) * 1972-03-10 1974-04-16 Alister R Mc Energy conversion system
US20060059912A1 (en) * 2004-09-17 2006-03-23 Pat Romanelli Vapor pump power system
DE102009057179A1 (en) * 2009-12-05 2011-06-09 Werba, Hans Steam or compressed gas, liquid propellant engine for producing rotational power, is provided with power unit that has vaporizer or compressed gas container, and container, where vaporizer and container are connected
US20160230609A1 (en) * 2013-09-24 2016-08-11 Songwei GUO High-efficiency power generation system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3803847A (en) * 1972-03-10 1974-04-16 Alister R Mc Energy conversion system
US20060059912A1 (en) * 2004-09-17 2006-03-23 Pat Romanelli Vapor pump power system
DE102009057179A1 (en) * 2009-12-05 2011-06-09 Werba, Hans Steam or compressed gas, liquid propellant engine for producing rotational power, is provided with power unit that has vaporizer or compressed gas container, and container, where vaporizer and container are connected
US20160230609A1 (en) * 2013-09-24 2016-08-11 Songwei GUO High-efficiency power generation system

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