CN107782009A - Metal hydride refrigeration system and its control method - Google Patents
Metal hydride refrigeration system and its control method Download PDFInfo
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- CN107782009A CN107782009A CN201610726243.2A CN201610726243A CN107782009A CN 107782009 A CN107782009 A CN 107782009A CN 201610726243 A CN201610726243 A CN 201610726243A CN 107782009 A CN107782009 A CN 107782009A
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- reactor
- heat exchanger
- refrigerating medium
- heat
- metal hydride
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Classifications
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- 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
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/09—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being hydrogen desorbed from a hydride
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- 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]
- Y02B30/62—Absorption based systems
Abstract
The invention provides a kind of metal hydride refrigeration system, it includes：First reactor, inside are filled with metal hydride, to carry out heat release or heat absorption using the suction hydrogen and dehydrogenation reaction of metal hydride；Second reactor, inside are also filled with metal hydride, to carry out heat release or heat absorption using the suction hydrogen and dehydrogenation reaction of metal hydride；Electrochemical compression device, it is arranged between first reactor and second reactor, the running status according to first reactor and/or second reactor, adjustment hydrogen flow direction and pressure are configured to, to cause first reactor and second reactor alternately heat release and heat absorption respectively；Refrigerating medium EGR, with refrigerating medium pipeline and at least one heat exchanger, wherein refrigerating medium pipeline is respectively communicated with first reactor, second reactor and heat exchanger, with using refrigerating medium therein by the heat transmission of first reactor and/or second reactor to heat exchanger, so as to realize lasting refrigeration.
Description
Technical field
The present invention relates to refrigeration plant, more particularly to metal hydride refrigeration system and its control method.
Background technology
Under certain temperature and pressure, some alloys and metallic compound can carry out reversible reaction generation metallic hydrogen with hydrogen
Compound.Heat release when reaction characteristicses between hydrogen bearing alloy and hydrogen is inhale hydrogen, heat absorption are to release hydrogen, no matter hydrogen abstraction reaction or
Hydrogen discharge reaction is related to the temperature, pressure and alloying component of system.The thermal effect reacted between metal hydride and hydrogen
The direction that reaction is carried out should can be controlled by adjusting pressure, realize the conversion of heat energy.
Above-mentioned response characteristic causes metal hydride in energy conversion with being widely used using field, prior art
In there are some metal hydride refrigeration systems, these systems have environmental protection peace as a kind of novel heat converting system
The advantages of complete Jing Yin, but there is also some problems, promoting the use of for this kind of refrigeration system is have impact on, metal hydride needs
Alternately inhale hydrogen and put hydrogen, cause to be only capable of intermittent refrigeration, heating efficiency is relatively low.
The content of the invention
It is an object of the present invention to provide a kind of to realize the metal hydride refrigeration system persistently freezed.
The present invention one is further objective is that the thermal efficiency of metal hydride refrigeration system will be improved.
The present invention another further objective is that to simplify the control process of metal hydride refrigeration system.
Especially, the invention provides a kind of metal hydride refrigeration system, it includes：First reactor, inside filling
There is metal hydride, to carry out heat release or heat absorption using the suction hydrogen and dehydrogenation reaction of metal hydride；Second reactor, it is internal
Filled with metal hydride, to carry out heat release or heat absorption using the suction hydrogen and dehydrogenation reaction of metal hydride；Electrochemical compression fills
Put, be arranged between first reactor and second reactor, be configured to the fortune according to first reactor and/or second reactor
Row state, hydrogen flow direction and pressure in first reactor and second reactor are adjusted, to cause first reactor and second anti-
Answer device alternately heat release and heat absorption respectively；Refrigerating medium EGR, there is refrigerating medium pipeline and at least one heat exchanger, wherein
Refrigerating medium pipeline is respectively communicated with first reactor, second reactor and heat exchanger, with anti-by first using refrigerating medium therein
The heat transmission of device and/or second reactor is answered to heat exchanger.
Alternatively, above-mentioned metal hydride refrigeration system also includes：Regulated power supply, it is configured to controllably to electrochemical compression
Device provides direct current, and the polarity and voltage of direct current are true all in accordance with the running status of first reactor and/or second reactor
It is fixed.
Alternatively, heat exchanger includes First Heat Exchanger and the second heat exchanger, and refrigerating medium EGR also includes：Refrigerating
Agent changeover module, be connected with refrigerating medium pipeline, and be configured to make First Heat Exchanger keep with the first reactor that carries out heat release or
Second reactor connects, and makes the second heat exchanger keep connecting with the first reactor or second reactor absorbed heat.
Alternatively, refrigerating medium changeover module includes：First four-way valve, two liquid inlet are respectively connecting to First Heat Exchanger
Exported with the refrigerating medium of the second heat exchanger, two outlet end is respectively connecting to the refrigerating medium of first reactor and second reactor
Entrance, so that the refrigerating medium of the first four-way Vavle switching First Heat Exchanger and the second heat exchanger flows out direction；And second four-way valve,
Two liquid inlet is respectively connecting to the refrigerating medium outlet of first reactor and second reactor, and two outlet end connects respectively
To First Heat Exchanger and the refrigerating medium entrance of the second heat exchanger, so that the second four-way Vavle switching First Heat Exchanger and the second heat exchanger
Refrigerating medium inflow direction.
Alternatively, above-mentioned metal hydride refrigeration system also includes：First pump, it is configured as flowing through the load of First Heat Exchanger
Cryogen provides power；And second pump, the refrigerating medium for being configured as flowing through the second heat exchanger provide power.
According to another aspect of the present invention, a kind of control method of metal hydride refrigeration system is additionally provided.Wherein
Metal hydride refrigeration system includes：Utilize the first reaction for inhaling hydrogen and dehydrogenation reaction progress heat release or heat absorption of metal hydride
Device, using the suction hydrogen and dehydrogenation reaction of metal hydride carry out the second reactor of heat release or heat absorption, be arranged at first reactor
And the electrochemical compression device between second reactor, the refrigerating medium circulation with refrigerating medium pipeline and at least one heat exchanger
Device, and control method includes：Detect the running status of first reactor and/or second reactor；Driven according to running status
Dynamic electrochemical compression device, hydrogen flow direction and pressure in first reactor and second reactor are adjusted, to cause the first reaction
Device and second reactor alternately heat release and heat absorption respectively；It is and switching refrigerating medium pipeline connection first reactor, second anti-
The state of device and heat exchanger is answered, using the refrigerating medium in refrigerating medium EGR by first reactor and/or second reactor
Heat transmission to heat exchanger.
Alternatively, metal hydride refrigeration system also includes the regulated power supply that direct current is provided to electrochemical compression device,
And the step of driving electrochemical compression device according to running status includes：According to first reactor and/or second reactor
Running status determines the polarity and voltage of direct current, to adjust the direction of electrochemical compression device transmission hydrogen and pressure.
Alternatively, heat exchanger includes First Heat Exchanger and the second heat exchanger, and refrigerating medium EGR is also cut including refrigerating medium
The step of changing component, and switching the state of refrigerating medium pipeline connection first reactor, second reactor and heat exchanger includes：
Drive refrigerating medium changeover module to change the refrigerating medium flow direction of First Heat Exchanger and the second heat exchanger so that First Heat Exchanger keep with
First reactor or the second reactor connection of heat release are carried out, and the second heat exchanger is kept the first reactor with being absorbed heat
Or second reactor connection.
Alternatively, metal hydride refrigeration system also include flowing through that the refrigerating medium of First Heat Exchanger provides power first
Pump and to flow through the second pump that the refrigerating medium of the second heat exchanger provides power, and method also includes：Adjusted according to running status
The flow velocity of first pump and the second pump.
Alternatively, the step of running status of detection first reactor and/or second reactor includes：The reaction of detection first
The internal-response pressure of one of hydrogen abstraction reaction is carried out in device and second reactor, and by internal-response pressure and default first
Reaction pressure threshold value and the second reaction pressure threshold value are respectively compared, wherein the first reaction pressure threshold value is more than the second reaction pressure threshold
Value；The step of polarity and voltage that direct current is determined according to the running status of first reactor and/or second reactor, includes：
In the case that internal-response pressure is more than or equal to the first reaction pressure threshold value, preset if the voltage of direct current is more than or equal to
Voltage minimum threshold, then turn down the voltage of direct current, if the voltage of direct current is less than voltage minimum threshold, maintain current electricity
Pressure value, in the case that internally reaction pressure is less than the second reaction pressure threshold value, if the voltage of direct current is less than default voltage
Max-thresholds, then heighten current voltage value；If the voltage of direct current is more than or equal to voltage max-thresholds and internal-response pressure
Time less than the second reaction pressure threshold value exceedes preset time, then switches the polarity of voltage direction of direct current；Drive refrigerating medium
The step of refrigerating medium of changeover module change First Heat Exchanger and the second heat exchanger flows to includes：In the voltage pole of switching direct current
Property direction after, switch the refrigerating medium flow direction of First Heat Exchanger and the second heat exchanger；And according to running status adjust the first pump and
The step of flow velocity of second pump, includes：Internally reaction pressure is more than or equal to the second reaction pressure threshold value and anti-less than first
In the case of answering pressure threshold, make the flow velocity of the first pump and the second pump as the size of internal-response pressure changes and mutually strains
Change.
The metal hydride refrigeration system of the present invention, two reactors and electrochemical compression device are set, utilize the electrification
Compression set is learned, the hydrogen flow direction and pressure of two reactors can be adjusted, makes two reactors, one progress hydrogen abstraction reaction, separately
One progress dehydrogenation reaction, alternately heat release and heat absorption, and exchanged heat by refrigerating medium EGR with reactor, it is real
Show lasting refrigeration, make full use of the heat energy transfer capability of reactor.
Further, metal hydride refrigeration system of the invention, electrochemical compression device can be made by regulated power supply
Controllably reactor is adjusted, adjusted in real time according to the running status of reactor, control is flexible.
Further, metal hydride refrigeration system of the invention, First Heat Exchanger, the second heat exchanger is set, utilize load
Cryogen changeover module, switching First Heat Exchanger, the second heat exchanger and first reactor or the annexation of second reactor so that
First Heat Exchanger discharges heat all the time, the second heat exchanger is freezed all the time, so as to make full use of the operating efficiency of reactor.
In addition, present invention also offers the control method for above-mentioned metal hydride refrigeration system, reacted by detecting
The running situation of device, metal hydride refrigeration system is controlled automatically, ensures its reliability of operation.
The metal hydride refrigeration system of the present invention can apply to a variety of occasions, such as building or the vehicles
The refrigerating such as air conditioner, refrigerator equipment, heating equipment etc..
According to the accompanying drawings will be brighter to the detailed description of the specific embodiment of the invention, those skilled in the art
Above-mentioned and other purposes, the advantages and features of the present invention.
Brief description of the drawings
Some specific embodiments of the present invention are described in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter.
Identical reference denotes same or similar part or part in accompanying drawing.It should be appreciated by those skilled in the art that these
What accompanying drawing was not necessarily drawn to scale.In accompanying drawing：
Fig. 1 is the schematic diagram of metal hydride refrigeration system according to an embodiment of the invention；
Fig. 2 is the schematic diagram of metal hydride refrigeration system according to another embodiment of the present invention；
Fig. 3 shows another working condition of the metal hydride refrigeration system shown in Fig. 2；
Fig. 4 is the schematic diagram of the control method of metal hydride refrigeration system according to an embodiment of the invention；And
Fig. 5 is the schematic flow sheet of the control method of metal hydride refrigeration system according to an embodiment of the invention.
Embodiment
Fig. 1 is the schematic diagram of metal hydride refrigeration system 10 according to an embodiment of the invention.The metal
Hydride refrigeration system 10 is general to be included：First reactor 210, second reactor 220, electrochemical compression device
230th, refrigerating medium EGR 100.
The inside of first reactor 210 and second reactor 220 is separately filled with metal hydride, to utilize metal hydride
The suction hydrogen and dehydrogenation reaction of thing carry out heat release or heat absorption.In the present embodiment, first reactor 210 and second reactor 220 can
To use identical reactor, metal hydride of filling can select to require to select according to the refrigeration of use occasion in it, example
Such as lanthanon hydrogen storage alloy, titanium base hydrogen storage alloy, magnesium microalloying, the reaction of metal hydride is may be referred in selection
Heat content, hydrogen-sucking amount, anti-poisoning performance, working life etc..The operation principle of first reactor 210 and second reactor 220 is：By
Filter screen is separated out hydrogen runner, and by filter screen and metal hydride Mass and heat transfer occurs for hydrogen, and caused heat is by outside load
Cryogen is taken away.First reactor 210 and second reactor 220 can use but be not limited to following reactor：Drum type brake reactor,
Fin pipe reactor, shell and tube thermal reactor, capillary type reactor.
Electrochemical compression device (or being electrochemistry hydrogen pump) 230, is arranged at first reactor 210 and second reactor
Between 220, the running status according to first reactor 210 and/or second reactor 220 is configured to, adjusts first reactor 210
With the hydrogen flow direction and pressure in second reactor 220.Electrochemical compression device 230 realizes that hydrogen orientation passes by internal electric field
It is defeated, that is, hydrogen is fed to the reactor for carrying out hydrogen abstraction reaction from the reactor for carrying out dehydrogenation reaction, reach regulation both sides hydrogen
The purpose of atmospheric pressure and concentration.
The operation principle of electrochemical compression device (or being electrochemistry hydrogen pump) 230 is：When the air-flow containing hydrogen enters
Behind the anode chamber of electrochemical compression device, hydrogen molecule can pass through gas diffusion layers and reach Catalytic Layer, in reacting gas, catalyst
Oxidation reaction occurs with the three phase boundary of dielectric film, hydrogen analysis is oxidized to proton and electronics, subsequent proton is additional
Catalytic Layer and porous diffusion layer and the bipolar plates of conduction are passed through toward negative electrode transmission, electronics by dielectric film in the presence of voltage
It is transmitted to external circuit.The anode and cathode reaction effect of electrochemical compression device 230 is：Hydrogen molecule is from the relatively low anode gas of hydrogen content
Body is pumped to negative electrode, turns into the higher cathode gas of hydrogen content.The hydrogen purity of the negative electrode of electrochemical compression device 230 output is high,
And High voltage output can be achieved in the case of without mechanical compressor.So as to which electrochemical compression device 230 connects positive pole electricity
The reactor of side (i.e. anode) connection of pressure carries out dehydrogenation reaction, and electrochemical compression device 230 connects the one of cathode voltage
The reactor of side (i.e. negative electrode) connection carries out hydrogen abstraction reaction.Therefore, can by adjusting the power supply polarity of electrochemical compression device 230
To change the outbound course of hydrogen, pressure at both sides can be adjusted by the DC voltage value for adjusting electrochemical compression device 230
Difference, and DC current flow value can also influence defeated hydrogen speed.
Refrigerating medium EGR 100 has refrigerating medium pipeline 120 and at least one heat exchanger 110, wherein refrigerating medium pipeline
120 are respectively communicated with first reactor 210, second reactor 220 and heat exchanger 110, to utilize refrigerating medium therein by first
The heat transmission of reactor 210 and/or second reactor 220 is changed to heat exchanger 110 by heat exchanger 110 and surrounding environment function
Heat, namely refrigerating medium make first reactor 210 carry out heat respectively with heat exchanger 110 with heat exchanger 110 and second reactor 220
Exchange.So as to which refrigerating medium EGR 100 can allow refrigerating medium carry heat caused by reactor to heat exchanger 110
Place, heat exchange is carried out with the surrounding environment of heat exchanger 110, realizes refrigeration or the purpose of heating.
The metal hydride refrigeration system 10 of the present embodiment is also provided with regulated power supply 240, for electrochemistry pressure
Compression apparatus 230 is powered, and the regulated power supply 240 is configured to controllably provide direct current to electrochemical compression device 230, direct current
Polarity and voltage determine all in accordance with the running status of first reactor 210 and/or second reactor 220.With regulated power supply 240
Voltage increase, electrochemical compression device 230 provide hydrogen pressure accordingly increase, regulated power supply 240 polarity of voltage turn
After changing, electrochemical compression device 230 transmits the direction respective change of hydrogen, such as is supplied in the hydrogen of the dehydrogenation of first reactor 210
During hydrogen abstraction reaction being carried out to second reactor 220, if the input voltage dipole inversion of electrochemical compression device 230,
Hydrogen flow direction is changed to feed to first reactor 210 from second reactor 220, so that second reactor 220 carries out dehydrogenation
Reaction, and first reactor 210 carries out hydrogen abstraction reaction.By making first reactor 210 and the alternation of second reactor 220,
The continuous firing of metal hydride refrigeration system 10 can be ensured.
Fig. 2 is the schematic diagram of metal hydride refrigeration system 10 according to another embodiment of the present invention.In the reality
To apply in example, metal hydride refrigeration system 10 has used First Heat Exchanger 111 and second heat exchanger, 112 two heat exchangers, and
It is additionally provided with refrigerating medium changeover module.
Refrigerating medium changeover module is connected with refrigerating medium pipeline 120, can be configured to make First Heat Exchanger 111 keep and carry out
The first reactor 210 or second reactor 220 of heat release connect, and make the holding of the second heat exchanger 112 and absorbed heat first
Reactor 210 or second reactor 220 connect.
Refrigerating medium changeover module can realize its function by two four-way valves.Wherein two of the first four-way valve 131
The refrigerating medium that liquid inlet is respectively connecting to the heat exchanger 112 of First Heat Exchanger 111 and second exports, two of the first four-way valve 131
Outlet end is respectively connecting to the refrigerating medium entrance of first reactor 210 and second reactor 220, so that the first four-way valve 131 is cut
Change the refrigerating medium outflow direction of the heat exchanger 112 of First Heat Exchanger 111 and second.Two liquid inlets difference of second four-way valve 132
It is connected to the refrigerating medium outlet of first reactor 210 and second reactor 220, two outlet ends difference of the second four-way valve 132
The refrigerating medium entrance of the heat exchanger 112 of First Heat Exchanger 111 and second is connected to, so that the heat exchange of the second four-way valve 132 switching first
The refrigerating medium inflow direction of the heat exchanger 112 of device 111 and second.Two four-way valves used above are only the one of refrigerating medium changeover module
The optional implementation of kind, in some other embodiments, can realize refrigerating medium side by the structure of other pipelines and valve
To switching.
The metal hydride refrigeration system 10 of the present embodiment is also provided with to flow through the refrigerating medium of First Heat Exchanger 111
First pump 141 of power is provided and provides the second pump of power 142 to flow through the refrigerating medium of the second heat exchanger 112.First pump 141
It can be adjusted with the pumping flow velocity of the second pump 142 with controlled.In some alternative embodiments, the first pump 141 and the second pump 142
It can be respectively arranged in the refrigerating medium pipeline 120 of the port of export of 111 and second heat exchanger of First Heat Exchanger 112.
Fig. 2 also show the flow direction of refrigerating medium in refrigerating medium EGR 100, wherein solid arrow and dotted arrow difference
For flow through the direction of the refrigerating medium of First Heat Exchanger 111 and flow through the second heat exchanger 112 refrigerating medium direction.Wherein the 1st
The refrigerating medium that First Heat Exchanger 111 flows out is conducted to first reactor 210 by port valve 131, after entering heat exchange, the second four-way valve
Refrigerating medium is led back to First Heat Exchanger 111 by 132, realizes one group of refrigerating medium circulation.First four-way valve 131 is by the second heat exchanger
The refrigerating medium of 112 outflows is conducted to first reactor 210, and after entering heat exchange, refrigerating medium is led back to first and changed by the second four-way valve 132
Hot device 111, realize one group of refrigerating medium circulation.The refrigerating medium that second heat exchanger 112 flows out is conducted to by the first four-way valve 131
Two reactors 220, after entering heat exchange, refrigerating medium is led back to the second heat exchanger 112 by the second four-way valve 132, realizes another group of load
Refrigerant cycle.
In this process, first reactor 210 can carry out hydrogen abstraction reaction, and to discharge heat release, second reactor 220 can be with
Dehydrogenation reaction is carried out, to absorb heat.First Heat Exchanger 111 is by the heat transfer of first reactor 210 to its surrounding environment, and
The cold of second reactor 220 is transferred to its surrounding environment by two heat exchangers 112.
Fig. 3 shows another working condition of the metal hydride refrigeration system 10 shown in Fig. 2, in the figure, solid arrow
The direction for flowing through the refrigerating medium of First Heat Exchanger 111 and the load for flowing through the second heat exchanger 112 are still represented respectively with dotted arrow
The direction of cryogen.The refrigerating medium that First Heat Exchanger 111 flows out is conducted to second reactor 220 by the first four-way valve 131, was entered and is changed
After heat, refrigerating medium is led back to First Heat Exchanger 111 by the second four-way valve 132, realizes one group of refrigerating medium circulation.Second four-way valve
The refrigerating medium that second heat exchanger 112 flows out is conducted to first reactor 210 by 132, and after entering heat exchange, the second four-way valve 132 will
Refrigerating medium leads back to the second heat exchanger 112, realizes another group of refrigerating medium circulation.
In this process, first reactor 210 can carry out dehydrogenation reaction, and to absorb heat, second reactor 220 can be with
Hydrogen abstraction reaction is carried out, to discharge heat release.First Heat Exchanger 111 is by the heat transfer of second reactor 220 to its surrounding environment, and
The cold of first reactor 210 is transferred to its surrounding environment by two heat exchangers 112.
By above structure, First Heat Exchanger 111 can be made to keep the reactor with progress heat release to connect, carry out all the time to
Outer release heat, and make the second heat exchanger 112 keep connecting with the reactor to be absorbed heat, carry out all the time to environment drop where it
Temperature.
The metal hydride refrigeration system 10 of the present embodiment, it can flexibly apply to air-conditioning system, refrigerating equipment, adopt
In heating equipment, realize and persistently supply heat and cold.
The present embodiment additionally provides a kind of control method of metal hydride refrigeration system 10.The control method can be to upper
The metal hydride refrigeration system 10 for stating any embodiment is controlled, to ensure that the stabilization of metal hydride refrigeration system 10 can
By operation.Fig. 4 is the schematic diagram of the control method of metal hydride refrigeration system 10 according to an embodiment of the invention, the gold
The control method of category hydride refrigeration system 10 can include in general manner：
Step S402, detect the running status of first reactor 210 and/or second reactor 220；
Step S404, electrochemical compression device 230 is driven according to running status, it is anti-to adjust first reactor 210 and second
Hydrogen flow direction and the pressure in device 220 are answered, to cause first reactor 210 and the alternately heat release respectively of second reactor 220
And heat absorption；
Step S406, switching refrigerating medium pipeline 120 connect first reactor 210, second reactor 220 and heat exchanger
110 state, using the refrigerating medium in refrigerating medium EGR 100 by first reactor 210 and/or the second reactor
220 heat transmission to heat exchanger 110 so that first reactor 210 with heat exchanger 110 and second reactor 220 with changing
Hot device 110 carries out heat exchange respectively.
Above-mentioned running status can include the internal pressure, temperature, hydrogen of first reactor 210 and second reactor 220
The parameters such as flow direction.Step S404 can be by be could be adjusted to realize to regulated power supply 240, and specifically, step S404 can be wrapped
Include：The polarity and voltage of direct current are determined according to the running status of first reactor 210 and/or second reactor 220, with adjustment
Electrochemical compression device 230 transmits direction and the pressure of hydrogen.
In the case of using First Heat Exchanger 111 and second heat exchanger, 112 two heat exchangers, step S406 can be：
Refrigerating medium changeover module is driven to change the refrigerating medium flow direction of the heat exchanger 112 of First Heat Exchanger 111 and second, so that First Heat Exchanger
111 keep connecting with carrying out the reactor (first reactor 210 or second reactor 220) of heat release, and make the second heat exchanger 112
Keep connecting with the reactor (first reactor 210 or second reactor 220) to be absorbed heat.
In addition, the control method of the metal hydride refrigeration system 10 of the present embodiment can also be according to the operation shape of reactor
State adjusts the flow velocity of the first pump 142 and the second pump 142.
The execution flow of the control method of the metal hydride refrigeration system 10 of the present embodiment is：
The internal-response pressure of one that hydrogen abstraction reaction is carried out in first reactor 210 and second reactor 220 is detected, and
Internal-response pressure and default first reaction pressure threshold value and the second reaction pressure threshold value are respectively compared, wherein the first reaction
Pressure threshold is more than the second reaction pressure threshold value；
In the case that internally reaction pressure is more than or equal to the first reaction pressure threshold value, if the voltage of direct current is more than
Or equal to default voltage minimum threshold, then the voltage of direct current is turned down, if the voltage of direct current is less than voltage minimum threshold,
Current voltage value is maintained, in the case that internally reaction pressure is less than the second reaction pressure threshold value, if the voltage of direct current is less than
Default voltage max-thresholds, then heighten current voltage value；If the voltage of direct current is more than or equal to voltage max-thresholds and interior
The time that portion's reaction pressure is less than the second reaction pressure threshold value exceedes preset time, then switches the polarity of voltage direction of direct current；
Behind the polarity of voltage direction of switching direct current, switch the refrigerating medium of the heat exchanger 112 of First Heat Exchanger 111 and second
Flow direction；
Internally reaction pressure is more than or equal to the second reaction pressure threshold value and less than the feelings of the first reaction pressure threshold value
Under condition, the flow velocity of the first pump 141 and the second pump 142 is set to change and respective change with the size of internal-response pressure.
Above-mentioned control method can be entered automatically by detecting the running situation of reactor to metal hydride refrigeration system 10
Row control, ensures its reliability of operation.In the above-mentioned methods, various threshold values according to workplace and reactor and can change
The characteristic of hot device 110 is configured, such as the first reaction pressure threshold value and two reaction pressure threshold values can be respectively that reactor enters
Maximum reaction pressure and the minimal reaction pressure of row hydrogen abstraction reaction；Voltage minimum threshold and voltage max-thresholds can be respectively can
Adjust the maximum supply voltage of power supply 240 and minimum supply voltage.Technical teaching of the those of ordinary skill in the art in the present embodiment
Under, have the ability to configure above-mentioned threshold value.
Fig. 5 is the flow signal of the control method of metal hydride refrigeration system 10 according to an embodiment of the invention
Figure, the flow can be used for being controlled the metal hydride refrigeration system 10 shown in Fig. 2.In figure, it is anti-that P expressions carry out suction hydrogen
The internal-response pressure for the reactor answered, P is bigger, and hydrogen abstraction reaction is more active, and P0 represents the second reaction pressure threshold value, and Pmax is represented
First reaction pressure threshold value, t are timing time, and its value represents the duration that P is less than P0, and V represents electrochemical compression device 230
Supply voltage；Vmin represents voltage minimum threshold；Vmax represents voltage max-thresholds；T is preset time.The metal hydride
The flow of the control method of refrigeration system 10 can include：
Step S502, detection carry out the internal-response pressure P of the reactor of hydrogen abstraction reaction；
Step S504, P and P0 and Pmax respectively compared with, in the case of P >=Pmax, perform step S510 and its
Subsequent step；In Pmax>In the case of P >=Pmin, step S520 and its subsequent step are performed；In the case of P≤Pmin, hold
Row step S530 and its subsequent step；
Step S510, is zeroed out to t；
Step S512, judge whether to meet V >=Vmin, execution step is returned if so, performing after step S514 turns down V
S502, directly return perform step S502 if not, so as to by turning down V reduction P and avoiding V too low；
Step S520, is zeroed out to t, then performs the rotating speed that step S522 adjusts the first pump 141 and the second pump 142,
The flow velocity of the first pump 141 and the second pump 142 is changed and respective change with P size, i.e., reduce refrigerating medium with P reduction
Flow velocity.
Step S530, judge whether to meet V<Vmax, if after performing step S532 raisings V, return and perform step S502,
So as to improve V raising P and avoid V too high；
Step S534, it is being unsatisfactory for V<During Vmax, namely when V has reached the upper limit, judge whether to meet t >=T, if it is not,
Return and perform step S502；
Step S536, when meeting t >=T, change V direction, change the operational mode of reactor；
Step S538, switch the mode of communicating of the first four-way valve 131 and the second four-way valve 132, protect First Heat Exchanger 111
Hold and connected with carrying out the reactor of hydrogen abstraction reaction, and make the second heat exchanger 112 keep connecting with carrying out the reactor of dehydrogenation reaction.
It can ensure that metal hydride refrigeration system 10 is reliablely and stablely run using the above method, and lasting progress
Heat exchange.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple showing for the present invention
Example property embodiment, still, still can be direct according to present disclosure without departing from the spirit and scope of the present invention
It is determined that or derive many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognized
It is set to and covers other all these variations or modifications.
Claims (10)
1. a kind of metal hydride refrigeration system, including：
First reactor, its inside is filled with metal hydride, to be entered using the suction hydrogen and dehydrogenation reaction of the metal hydride
Row heat release or heat absorption；
Second reactor, metal hydride is also filled with inside it, to utilize the suction hydrogen and dehydrogenation reaction of the metal hydride
Carry out heat release or heat absorption；
Electrochemical compression device, it is arranged between the first reactor and the second reactor, is configured to according to
The running status of first reactor and/or the second reactor, adjust in the first reactor and the second reactor
Hydrogen flow direction and pressure, to cause the alternately heat release and heat absorption respectively of the first reactor and the second reactor；
Refrigerating medium EGR, there is refrigerating medium pipeline and at least one heat exchanger, wherein the refrigerating medium pipeline is respectively communicated with
The first reactor, the second reactor and the heat exchanger, to be reacted using refrigerating medium therein by described first
The heat transmission of device and/or the second reactor is to the heat exchanger.
2. metal hydride refrigeration system according to claim 1, in addition to：
Regulated power supply, it is configured to controllably provide direct current, the polarity and electricity of the direct current to the electrochemical compression device
Pressure determines all in accordance with the running status of the first reactor and/or the second reactor.
3. metal hydride refrigeration system according to claim 1, wherein
The heat exchanger includes First Heat Exchanger and the second heat exchanger, and
The refrigerating medium EGR also includes：Refrigerating medium changeover module, it is connected with the refrigerating medium pipeline, and is configured to make
The First Heat Exchanger keeps connecting with the first reactor for carrying out heat release or the second reactor, and makes described second
Heat exchanger keeps connecting with the first reactor absorbed heat or the second reactor.
4. metal hydride refrigeration system according to claim 3, wherein the refrigerating medium changeover module includes：
First four-way valve, two liquid inlet is respectively connecting to the First Heat Exchanger and the refrigerating medium of second heat exchanger goes out
Mouthful, two outlet end is respectively connecting to the refrigerating medium entrance of the first reactor and the second reactor, so that described
The refrigerating medium of First Heat Exchanger and second heat exchanger described in first four-way Vavle switching flows out direction；And
Second four-way valve, two liquid inlet is respectively connecting to the first reactor and the refrigerating medium of the second reactor goes out
Mouthful, two outlet end is respectively connecting to the refrigerating medium entrance of the First Heat Exchanger and second heat exchanger, so that described
The refrigerating medium inflow direction of First Heat Exchanger and second heat exchanger described in second four-way Vavle switching.
5. metal hydride refrigeration system according to claim 4, in addition to：
First pump, the refrigerating medium for being configured as flowing through the First Heat Exchanger provide power；And
Second pump, the refrigerating medium for being configured as flowing through second heat exchanger provide power.
A kind of 6. control method of metal hydride refrigeration system, wherein the metal hydride refrigeration system includes：Utilize gold
Belong to the suction hydrogen of hydride and dehydrogenation reaction carries out the first reactor of heat release or heat absorption, utilizes the suction hydrogen of metal hydride and dehydrogenation
Reaction carries out the second reactor of heat release or heat absorption, the electricity being arranged between the first reactor and the second reactor
Chemical compression set, the refrigerating medium EGR with refrigerating medium pipeline and at least one heat exchanger, and the control method
Including：
Detect the running status of the first reactor and/or the second reactor；
The electrochemical compression device is driven according to the running status, adjusts the first reactor and the second reactor
Interior hydrogen flow direction and pressure, to cause the first reactor and the second reactor alternately heat release and suction respectively
Heat；And
Switch the state of first reactor, the second reactor and the heat exchanger described in the refrigerating medium pipeline connection,
Using the refrigerating medium in the refrigerating medium EGR by the first reactor and/or the heat transmission of the second reactor
To the heat exchanger.
7. control method according to claim 6, wherein the metal hydride refrigeration system is also included to the electrification
The regulated power supply that compression set provides direct current is learned, and
The step of driving the electrochemical compression device according to the running status includes：
The polarity and electricity of the direct current are determined according to the running status of the first reactor and/or the second reactor
Pressure, to adjust direction and the pressure that the electrochemical compression device transmits hydrogen.
8. control method according to claim 7, wherein the heat exchanger includes First Heat Exchanger and the second heat exchanger, institute
Stating refrigerating medium EGR also includes refrigerating medium changeover module, and
Switch the state of first reactor, the second reactor and the heat exchanger described in the refrigerating medium pipeline connection
Step includes：
The refrigerating medium changeover module is driven to change the refrigerating medium flow direction of the First Heat Exchanger and the second heat exchanger, so that described
First Heat Exchanger keeps connecting with the first reactor for carrying out heat release or the second reactor, and makes second heat exchange
Device keeps connecting with the first reactor absorbed heat or the second reactor.
9. control method according to claim 8, wherein, the metal hydride refrigeration system also includes described to flow through
The refrigerating medium of First Heat Exchanger provides the first pump and the to flow through that the refrigerating medium of second heat exchanger provides power of power
Two pumps, and methods described also includes：
The flow velocity of first pump and second pump is adjusted according to the running status.
10. control method according to claim 9, wherein,
The step of running status for detecting the first reactor and/or the second reactor, includes：
The internal-response pressure of one that hydrogen abstraction reaction is carried out in the first reactor and the second reactor is detected, and will
The internal-response pressure is respectively compared with default first reaction pressure threshold value and the second reaction pressure threshold value, wherein described
One reaction pressure threshold value is more than the second reaction pressure threshold value；
The polarity and voltage of the direct current are determined according to the running status of the first reactor and/or the second reactor
The step of include：
In the case where the internal-response pressure is more than or equal to the first reaction pressure threshold value,
If the voltage of the direct current is more than or equal to default voltage minimum threshold, the voltage of the direct current is turned down, if
The voltage of the direct current is less than the voltage minimum threshold, then maintains current voltage value, be less than in the internal-response pressure
In the case of the second reaction pressure threshold value, if the voltage of the direct current is less than default voltage max-thresholds, heighten
Current voltage value；If the voltage of the direct current is more than or equal to the voltage max-thresholds and the internal-response pressure is less than
The time of the second reaction pressure threshold value exceedes preset time, then switches the polarity of voltage direction of the direct current；
The refrigerating medium changeover module is driven to change the step of the refrigerating medium flow direction of the First Heat Exchanger and second heat exchanger
Suddenly include：
After the polarity of voltage direction of the direct current is switched, switch the refrigerating medium stream of the First Heat Exchanger and the second heat exchanger
To；And
Included according to the step of flow velocity of running status regulation first pump and second pump：
It is more than or equal to the second reaction pressure threshold value in the internal-response pressure and is less than first reaction pressure
In the case of threshold value, the flow velocity of first pump and second pump is set to change and phase with the size of the internal-response pressure
It should change.
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| CN201610726243.2A CN107782009A (en) | 2016-08-25 | 2016-08-25 | Metal hydride refrigeration system and its control method |
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| CN201610726243.2A CN107782009A (en) | 2016-08-25 | 2016-08-25 | Metal hydride refrigeration system and its control method |
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