CN102959820A - System for recovering renewable energy - Google Patents
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- CN102959820A CN102959820A CN2011800314003A CN201180031400A CN102959820A CN 102959820 A CN102959820 A CN 102959820A CN 2011800314003 A CN2011800314003 A CN 2011800314003A CN 201180031400 A CN201180031400 A CN 201180031400A CN 102959820 A CN102959820 A CN 102959820A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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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
- F25B27/00—Machines, plants or systems, using particular sources of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
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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
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0253—Compressor control by controlling speed with variable speed
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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
- Y02A30/272—Solar heating or cooling
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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
- 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]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention relates to a system (1) for recovering renewable energy, comprising a heat pump system (2) with at least one electric motor (16, 16') for a compressor (14) or a fluid circulation pump (18a, 18b), at least one photovoltaic solar panel (3), and an AC-DC/DC electronic converter (4) interconnected between the solar panels and the heat pump system. The system comprises at least one frequency variator (16, 16') connected to a DC outlet (24, 25) of the converter and to the electric motor for feeding and controlling the electric motor.
Description
The present invention relates to reclaim by heat pump the recovery system of rechargeable energy, particularly geothermal energy.
Conventional heat pump reclaims the heat energy of ground or air and needs for the pump of Fluid Circulation for this reason and be used for changing into heat exchange and the compressor of the phase of the fluid that uses.Heat pump is mainly used in the building of heating in winter, or the heating swimming pool.Although use rechargeable energy, heat pump still need the electrical network electric energy between the 35-50%, in order to give the motor power supply of circulating device and compressor.
In order to reduce the consumption of non-renewable energy, can consider to use other energy, such as photovoltaic solar panel or wind turbine.Many countries that are connected to of the electric power system of the installation of wind turbine or photovoltaic solar panel relatively expensive and itself and dwelling house or building go wrong, and reason is that be not limited to can not be to Injection Current in the public electric wire net, although there are some technical schemes.Yet solar energy and/or wind energy are unpredictalbe, and/or change, and do not allow continuously and guarantee as required electric energy that dwelling house, building or other building need.Because the energy that the use of rechargeable energy system generally can be used than public electric wire net at present is more expensive, thus the installation of rechargeable energy system (such as heat pump or photovoltaic solar panel) and running cost be for the business-like important indicator of system.
Known solar panels are connected with energy-recuperation system (such as battery), perhaps the public electric wire net with 50Hz or 60Hz is connected.With situation that public electric wire net is connected under, the direct current DC output of solar panels is connected with the line commutation device, converter is take the voltage generation fixed frequency corresponding with line voltage (for example 230VAC, 110VAC) as 50 or the sinusoidal current of 60Hz.The sinusoidal current that produces like this can be by any machine consumption that is connected with the family expenses electrical network.But solar panels carry out the shortcoming of current conversion by the converter that is connected with electrical network, are the energy losses that is converted to simple alternating current from direct current DC on the one hand, are owing to will produce sinusoidal ac, the relatively high cost of line commutation device on the other hand.
In JP 2010088276, the solar energy recovery system that is connected with heat pump has been described.In order to consider the variation of the electrical power that solar panels provide, also comprise mains supply for the power supply of heat pump.The alternating current of electrical network is converted to direct current DC by the AC-DC transducer, and each current source, i.e. electrical network, solar panels or battery, and each is connected with converter, in order to produce the sinusoidal current that offers the heat pump power supply.Different converters is by the controller control that is connected with the voltmeter of the output of solar panels, in order to change power between each source according to available solar power.The shortcoming of this system is, the higher cost of controller that converter is provided and controls the output of different converters for each current source, and also have with a plurality of current sources between this conversion power loss relevant with interconnection system.In fact, as in the conventional system in native system, people make every effort to produce for the sine wave to the motor power supply of heat pump.
The objective of the invention is to realize the rechargeable energy generation system, the installation of this system, use all very economicals, and have in the rechargeable energy that generates and be used for larger ratio between the non-renewable energy of its generation.
One of specific purpose of the present invention provides installs and uses very economical and especially effectively in order to allow to consume the geothermal energy recovery system of less electric flux from public electric wire net.
The objective of the invention is that rechargeable energy recovery system by according to claim 1 and 2 realizes.
Now, describe the rechargeable energy recovery system, comprising: at least one alternating current machine, one or more photovoltaic solar panels, and be interconnected to AC-DC/DC electronic commutator between solar panels and the motor.This system comprises the frequency converter that at least one and the direct current DC output of AC-DC/DC electronic commutator are connected with motor.Frequency converter be arranged to motor directly power supply and need not be provided for carrying out the line commutation device of conversion of the DC output of photovoltaic solar panel.Frequency converter allows to control motor simultaneously.
In the specific embodiment of the present invention, the rechargeable energy recovery system comprises: have the heat pump at least one motor of compressor or fluid circulation pump, one or more photovoltaic solar panels, be interconnected to the AC-DC/DC electronic commutator between solar panels and the heat pump, with at least one frequency converter, this frequency converter is connected with motor with the direct current DC output of AC-DC/DC electronic commutator, is arranged to speed and electric current to motor power supply and control motor.
Advantageously, frequency converter allows the control motor and provides voltage/current, the compressor of motor-driven heat pump or circulating pump to motor.The supply of photovoltaic solar does not almost arrive in the motor to loss, and this is because avoided processing with the three-phase converter DC signal of solar panels in transducer.AC-DC/DC electronic commutator of the present invention is very economical, even and small-power also be very easy to realized, because this is because frequency converter has been equipped with them without any need for inductance coil (self) or large filter capacitor.
To small-power (＜3kW) or mid power (＜10kW) equipment, compressor can have three phase electric machine and 400V AC three phase converter, and circulating device can have 230VAC monophase machine and the single-phase or three phase converter of 230V AC.
To high-power (〉 10kW) equipment, compressor and circulating device can have 400V three phase electric machine and frequency converter.
Advantageously can comprise energy storage system according to heat pump of the present invention, this energy storage system comprises the thermal energy storage body, in order to can use heat pump when solar energy is enough to power for motor.
The AC-DC/DC electronic commutator comprises at least one input that is connected with the interchange public electric wire net and is connected the direct current input that is connected with photovoltaic solar panel.The AC-DC/DC electronic commutator can comprise the one or more low pressure outputs that are arranged to transducer, valve, automatics and electronic installation power supply in addition, such as the output of 24V direct current, perhaps also comprises 5,10 or the 12V output for transducer.
The AC-DC/DC electronic commutator is arranged to and carries out AC-DC conversion and DC-DC conversion, the voltage commutation that the AC-DC conversion will exchange public electric wire net is the value direct voltage higher than line voltage, DC-DC conversion is higher than dc voltage value of being converted to of photovoltaic panel the voltage of the direct current dc voltage after the conversion of public electric wire net, and these two conversions provide two current sources.These two current sources can be connected with the power supply of frequency converter, and by the power supply protection diodes in parallel.
Difference between line commutation device and the frequency converter is that frequency converter allows to have the variable output frequency of 0-400Hz.The line commutation utensil has 50 or the fixedly output of 60Hz and be intended to power as public electric wire net (50 or 60Hz) for sinusoidal signal take basic.Frequency converter advantageously has for the current Control Algorithm that allows to produce the frequency of breakdown torque current ratio (MTPA=Maximum TorquePer Ampere maximum torque per ampere) in motor, and this allows to utilize best the electric current as the photovoltaic panel of current source.On the contrary, the line commutation device is just management usually, in order to produce 50 or the sinusoidal voltage of 60Hz.
That the output of frequency converter does not have the LC filter according to another significant difference of system of the present invention, because frequency converter is designed to directly power to alternating current machine.
According to claim and following detailed description and accompanying drawing to execution mode, other purpose of the present invention and favourable aspect will become clear, in the accompanying drawings,
Fig. 1 a is the schematic diagram of the geothermal energy recovery system with low-power (less than 3kW) photovoltaic solar equipment according to the embodiment of the present invention;
The schematic diagram of Fig. 1 b geothermal energy recovery system with mid power (3kW-10kW) photovoltaic solar equipment according to the embodiment of the present invention;
Fig. 1 c is the schematic diagram that has according to an embodiment of the invention the geothermal energy recovery system of high power (greater than 10kW) photovoltaic solar equipment;
Fig. 2 is the circuit diagram of AC-DC/DC electronic commutator according to the embodiment of the present invention;
Fig. 3 a is the schematic diagram of motor of compressor of the heat pump of geothermal energy recovery system according to the embodiment of the present invention;
Fig. 3 b be frequency converter according to the embodiment of the present invention power supply and with the schematic diagram that is connected of solar panels;
Fig. 4 is the schematic diagram that the operation principle of frequency converter is shown;
Fig. 5 a is the oscillogram of the output of frequency converter, and Fig. 5 b is the electric moter voltage of frequency converter and the graph of a relation between the motor speed;
Fig. 6 a represent the diagram that changes with open circuit voltage for different solar radiation values, the electric current that provided by the 175W photovoltaic solar panel, Fig. 6 b represent the difference open circuit voltage of 175W photovoltaic solar panel and short circuit current with solar radiation (with W/m
2Represent) and the diagram of variation.
With reference to accompanying drawing, underground heat and solar energy recovery system 1 comprise according to an embodiment of the invention: heat pump 2, one or more photovoltaic solar panels 3 are interconnected to the AC-DC/DC transducer 4 between solar panels and the heat pump, ground thermal detector 6 and comprise alternatively energy storage system 5.Heat pump 2 is connected with ground thermal detector fluid in order to reclaim the heat energy of ground or air and this energy is offered one or more heat energy users 7, such as building, swimming pool or other building.It is well-known reclaiming and the principle of energy itself is provided by heat pump, and therefore is not described in detail.One or more hygrosensors can be connected with the controller 35 of heat pump 2, in order to control heating and storage circuit according to the parameter of outside and/or internal temperature and user's definition, especially control the valve of its circuit.Therefore, the heat energy of generation can be as required with ambient temperature or be stored, perhaps directly used.
The 30-50% of the energy that conventional heat pump provides is from electrical network, and this energy is for the pump that makes fluid pass heat exchanger and flow in the ground thermal detector and be essential to the running of the compressor of heat pump especially.The adjusting that offers user's energy by conventional heat pump is to carry out the amount of the heat energy that the Timing of connection provides by switching on and off of system.Therefore, the motor of compressor and regular circulation pump has the very simple regulating system of the switchtype that switches on and off motor.In conventional system, motor is connected (being single-phase 230V and three-phase 400V 50Hz alternating current in Europe) with urban distribution network.In the heat pump of routine, motor is with constant constant speed rotation.Conventional heat pump does not comprise any storage system, and this is nonsensical, because stored energy is without any benefit in conventional heat pump.
Heat pump comprises the fluid line that passes heat exchanger 8 and ground thermal detector 6, and this circuit comprises cold line road part 10 and heat circuit part 12.Heat pump can comprise the single fluid circuit, or two fluid lines that separated by heat exchanger.For fluid is flowed in the line, heat pump comprises one, two or more circulating device 18a, 18b, and circulating device 18a, 18b comprise the fluid pump that is driven by motor 15 '.Compressor 14 also comprises the large motor of the motor of general power ratio circulating device 15.
Preferably give according to circulating device and the compressor of system of the present invention by frequency converter 16,16 ' and power, and control these circulating device and compressor, these frequency converters are connected with the direct voltage output 24,25 of electronic commutator 4.Electronic commutator 4 has the direct current input 23 that is connected with photovoltaic solar panel 3 and has input 21,22 for the alternating current of three-phase (400Vac) and single-phase (230Vac) urban distribution network.Electronic commutator 4 also can advantageously comprise low pressure output, such as 24 volts of direct current outputs, is used for to transducer, valve, automatics and electronic installation power supply.The advantageous embodiment of converter circuit is shown in Fig. 2.
The configuration of electronic commutator can be depended on the electrical power of photovoltaic solar panel 3, shown in following Fig. 1 a, the 1b and 1c that summarizes as example:
Fig. 1 a: low-power equipment-less than the photovoltaic solar panel of 3kW
AC-DC/DC electronic commutator 4 allows to supply direct currents by the three-phase input or by DC bus (if any) to frequency converter 16, and has following characteristics:
-three-phase 400VAC/230VAC the input 21,22 that is connected with public electric wire net;
The dc voltage input 23 of-150V DC-250V DC that is connected with photovoltaic solar panel;
The Voltage-output 24 of-550V DC-800V DC that is connected with the frequency converter 16 of compressor 14;
The Voltage-output 25 of-350V DC-450V DC that is connected with the frequency converter 16 ' of circulating device 18a, 18b;
-be used for exporting to the 24V dc voltage of valve, automatics and electronic installation power supply;
-for the DC/DC 0-10V simulation output of measuring grid power;
-for the 0-10V simulation output of measuring sun power;
-1-10kW three phase power.
Compressor has three phase electric machine 15 and three-phase 400V AC frequency converter 16, and circulating device 18a, 18b have single-phase 230V AC motor 15 ' and single-phase or three-phase 230V AC frequency converter 16 '.
Fig. 1 b: mid power equipment-3-10kW photovoltaic solar panel
AC-DC/DC electronic commutator 4 allows to supply with direct current by the three-phase input or by DC bus (if any) to frequency converter 16, and this transducer has following characteristics:
-three-phase 400V AC/230V AC the input 21,22 that is connected with public electric wire net;
The dc voltage input 23 of-600V DC-800V DC that is connected with photovoltaic solar panel;
The Voltage-output 24 of-600V DC-800V DC that is connected with the frequency converter 16 of compressor 14;
-350V DC-450V dc voltage the output 25 that is connected with the frequency converter 16 ' of circulating device 18a, 18b;
-be used for exporting to the 24V dc voltage of valve, automatics and electronic installation power supply;
-for the DC/DC 0-10V simulation output of measuring grid power;
-for the 0-10V simulation output of measuring sun power;
-3-30kW three phase power.
Compressor has three phase electric machine 15 and three-phase 400V AC frequency converter 16, and circulating device 18a, 18b have single-phase 230V AC motor 15 ' and single-phase or three-phase 230V AC frequency converter 16 '.
Fig. 1 c: high-power equipment-10kW-100kW photovoltaic solar panel
AC-DC/DC electronic commutator 4 allows to provide direct current by the three-phase input or by DC bus (if any) to frequency converter 16, and this transducer has following characteristics:
-three-phase 400V AC/230V AC the input 21,22 that is connected with public electric wire net;
The dc voltage input 23 of-600V DC-800V DC that is connected with photovoltaic solar panel;
-be connected the 600V DC-800V dc voltage output 24 that the frequency converter 16 ' of 18b is connected with circulating device 18a with the frequency converter 16 of compressor 14;
-be used for exporting to the 24V dc voltage of valve, automatics and electronic installation power supply;
-for the DC/DC 0-10V simulation output of measuring grid power;
-for the 0-10V simulation output of measuring sun power;
-10-300kW three phase power.
Compressor has three phase electric machine 15 and three-phase 400V AC frequency converter 16, and circulating device 18a, 18b have three-phase 400V AC motor 15 ' and three-phase 400V AC frequency converter 16 '.
Operation logic
AC-DC/DC electronic commutator 4(sees Fig. 1 a-1c and Fig. 2) be arranged to and carry out two kinds of conversion operations: alternating current AC is to the conversion of direct current DC, be 540V DC and 310V DC direct voltage with 400V AC and the rectification of 230VAC AC network, and the galvanic conversion of DC-DC, the direct current dc voltage of photovoltaic panel 3 is converted to slightly high (for example 5-30%, for example about 15%) in the voltage of the direct current dc voltage after conversion of 400V AC/230V AC public electric wire net.
These two current sources and frequency converter 16,16 ' power supply 34 are connected (seeing Fig. 3 a and 3b), and in parallel by power supply protection diode D1, D2, therefore, guarantee the isolation of two current sources.When the maximum power point of photovoltaic solar panel, should reach balance point (voltage in two sources is identical).Also can consider the upper tolerance limit of public electric wire net.
If with to the heat pump power supply, voltage will descend owing to the high impedance as the photovoltaic solar panel of current source work from the underpower of photovoltaic solar panel, then electric energy provide since electrical network than Low ESR and from electrical network.So the conversion that the electric energy between public electric wire net and solar panels provides is that basis is carried out automatically from the power of solar panels.The dc voltage of the electronic commutator 4 that obtains so advantageously is directly used in to frequency converter 16,16 ' power supply by frequency converter 16,16 ' three-phase or single phase power supply or by its DC bus (if any).Can be on three phase converter, can make only two-phase L1, the L2(of frequency converter 16,16 ' power supply 34 see Fig. 2,3a) be connected with the DC output 24,25 of electronic commutator 4.
According to filtration, accumulation and the regulating power that should configuration advantageously allow to use frequency converter of the present invention, this is because frequency converter comprises high dc voltage (〉 540V DC) under large value capacitor and motor 15,15 ' coil can be advantageously used for smoothing inductor coil (self delissage).
Therefore, electronic commutator AC-DC/DC 4 costs of the present invention are lower, even and the small-power of 1-2kW also is easy to realize, because advantageously it does not need inductance coil and filters electric capacity this is because frequency converter 16,16 ' has been furnished with them greatly.
The supply of photovoltaic solar does not almost arrive motor to loss, because avoid using in transducer the three-phase converter to process the DC signal of solar panels.
The adjuster of frequency converter allows control motor 15 and is its service voltage/electric current, and the data that motor 15 transmits according to the controller 36 by heat pump drive the compressor 14 of heat pump 2.
The controller 36 of heat pump according to can with electric solar energy and user's needs regulate heating or cooling power.
If solar energy is supplied with too many, then can be the energy storage that is produced by heat pump in memory bank 30, the size of memory bank 30 is according to the power of heat pump and the power determination of photovoltaic solar panel.Then, this energy can be later on by day or use night, with the heating and cooling mode operation.
According to favourable execution mode of the present invention, at refrigerating mode, the heat of generation can be transported in the ground thermal detector 6, so as with this stored energy in the earth.Can obtain larger system's annual earnings.
According to the present invention, the adjusting of heat pump allows to optimize the utilization index of solar energy, ideally near 100%, and does not need to inject sun electric energy in public electric wire net.
Winter operation
In the winter time, terrestrial heat pump can heat dwelling house and sanitary water, and the required electric power of its operation is mainly from single-phase 230V or three-phase 400V public electric wire net.If solar radiation allows, the electric power of photovoltaic solar panel is supplied with the consumption that allows to reduce on the public electric wire net.
The real-time calculating of the adjuster of heat pump can be by the power of photovoltaic solar panel domination, and regulate its heating power, in order to obtain best electrical network energy/solar energy ratio.
Advantageously can move continuously by day according to heat pump of the present invention, avoid on/off (start and the stop) function of conventional heat pump, this allows to obtain good income.
If solar energy is supplied with too many, can heat and allow this energy of storage in order to discharge the additional storage body 30 of this energy when finishing by day, and utilize the lower electrical network electric energy at night of price.If there is not enough sunlight, heat pump can draw the electric energy on the public electric wire net.
The operation in spring
The supply of photovoltaic solar is more than winter, and the heat energy that needs is less, and therefore, in fact heat pump can only move with solar energy.
Excess energy during daytime can be stored in the memory bank 30, and discharges at night.
Summer operation
Solar energy is supplied with maximum, and except hot water to heat need reduce, heat pump can only use photovoltaic solar to move with refrigerating mode.The storage of cold air can be carried out in the water storage tank that will use as required.The heat that produces can advantageously be transported in the ground thermal detector and can utilize the earth storage heat energy.The energy of this storage can be especially in the fall even use in winter.
The operation in autumn
Similar with the operation in spring, but efficient is higher, and this is because can reclaim the energy part that is transported to summer in the earth.
Wait for operation
When heat pump stops, even without the sun, still can being powered to electronic installation by the AC-DC/DC electronic commutator by photovoltaic solar panel during daytime.This allows to optimize the use of photovoltaic solar panel.
Frequency converter is connected with the wiring of three phase electric machine
Frequency converter is converted to for the direct voltage (DC) with the photovoltaic solar transducer can be by three phase electric machine direct three-phase alternating voltage that uses in the situation of control rate and electric current, shown in Fig. 5 a, 5b.The compressor 14 of driven by motor heat pump and be used for heating and circulating pump P1, the P2 of ground thermal detector 6.Frequency converter 16,16 ' comprises and allows storage to be enough to produce the large value capacitor of the energy of the required current peak of motor.
The present invention is combined photovoltaic solar panel obtainable frequency converter on market, and the controller 36 that allow to use frequency converter 16 is to produce three-phase alternating voltage in the situation of control motor 15,15 ' speed and electric current.
With reference to Fig. 1 a-1c and Fig. 4, the controller 36 of heat pump according to a plurality of parameters to frequency converter 16,16 ', 16 " the transmission speed reference, these a plurality of parameters as:
Heating or the cooling power of-needs
-available solar power
-the power that consumes at public electric wire net
The coefficient of performance of-COP(heat pump)
These parameters are configured to use the energy of public electric wire net and farthest use solar energy to produce ceiling capacity via heat pump by minimum degree ground.
Connection on frequency converter
The feature of photovoltaic solar panel
With reference to Fig. 6 a and 6b, photovoltaic solar panel is according to the solar radiation generation current, and this mainly carries out in proportional mode.In fact always have identical output voltage according to sunlit maximum power, difference is approximately 10%.In addition, this power keeps substantially constant in same voltage range, and this is convenient to structure and the DC-DC conversion thereof of electronic commutator 4.
The example of 175W solar panels
The AC-DC/DC transducer
According to embodiment, to the DC/DC conversion, transducer uses average frequency to be the push-pull type PWM(pulse width modulation of 100kHz) technology.This frequency is well compromise, because it allows the Application standard electronic component.For example transformer can be Ferroxcube ETD59 type, and is not too high in the loss of 150Khz frequency.Optimize the size of transformer according to the voltage/current feature of photovoltaic solar panel, in order to reach the maximum power that about 49% duty ratio is used for obtaining transformer.When the dc voltage of transducer surpasses 800V DC, overvoltage protection can be set, because the maximum working voltage of the capacitor of commercially available 400VAC/50Hz three phase converter is 800VDC.To the power greater than 2kW, the AC-DC/DC electronic commutator can be configured to only provide the low-power conversion with controller and circulating pump power supply to heat pump.
The controller of heat pump
The controller 36 of heat pump can be the general industry type, and such as Saia PCD1m, it has enough analog inputs in order to analyze best demand, income and energy production rate, as:
The electrical power that absorbs on-measurement the public electric wire net;
The electrical power that-measurement solar panels produce;
The thermal power of-measurement heat pump;
-measurement external temperature;
-measurement indoor temperature;
-measurement ECS(health hot water) temperature;
-measure initial heating-up temperature;
-measure and return heating-up temperature;
-measurement heating water flow rate;
-measurement evaporator initial temperature;
-measure evaporator to return temperature.
Solar panels and frequency converter are used with beyond favourable combination according to the electronic commutator for being connected the two of the present invention can be used for heat pump other, for example are used for the ventilating system of building, or use in the industrial production system of heat energy.Advantageously, the present invention allows commercially available frequency converter is connected on the photovoltaic solar panel, and need not to use the three-phase converter.Three phase electric machine has extraordinary efficient and therefore utilizes this solar energy by frequency converter is very favorable.
The tabulation of the Reference numeral among the figure
1 underground heat and solar energy recovery system
2 heat pumps
8 heat exchangers
10 cold line roads
12 heat circuits
14 compressors
15 motors
16 frequency converters
34 inverter supplies
18a, 18b circulating device
15 ' motor
16 ' frequency converter
34 inverter supplies
35 controllers
36 external temperature probes
3 photovoltaic solar panels
23 DC output
4 AC-DC/DC electronic commutatores
The input of 21 three-phase 400VAC electrical networks
22 single-phase 230VAC electrical network inputs
23 150-250V DC photovoltaic panel connect input
24 DC-550-800V DC output
25 DC-300-500V DC output
26 DC-24V DC output
5 energy storage systems
28 valves
30 memory banks
32 circuits
6 ground thermal detectors
7 heat energy users
Claims (16)
1. a rechargeable energy recovery system (1), comprise: be used for the compressor (14) of heat pump (2) or the fluid circulation pump (18a of heat pump (2), at least one motor (16 18b), 16), one or more photovoltaic solar panels (3), and AC-DC/DC electronic commutator (4), this AC-DC/DC electronic commutator (4) comprises and is configured to and exchanges AC power supplies, particularly exchange at least one input (21 that public electric wire net connects, 22) with at least one the direct current input (23) that is connected with described one or more photovoltaic solar panels, it is characterized in that, this rechargeable energy recovery system also comprises the direct current DC output (24 of at least one and transducer, 25) frequency converter (16 that connects and be connected with described at least one motor, 16 '), described frequency converter is configured to directly power to described at least one motor in the situation that does not have the line commutation device and be used for the control motor.
2. a rechargeable energy recovery system (1), comprise: have for compressor (14) or fluid circulation pump (18a, at least one motor (16 18b), 16 ') heat pump (2), one or more photovoltaic solar panels (3), and be interconnected in AC-DC/DC electronic commutator (4) between solar panels and the heat pump, this AC-DC/DC electronic commutator comprises and is configured to the AC power with AC, particularly exchange at least one input (21 that public electric wire net connects, 22), it is characterized in that, this AC-DC/DC electronic commutator (4) is interconnected between solar panels and the heat pump and does not have the line commutation device, and this rechargeable energy recovery system comprises the direct current DC output (24 of at least one and transducer, 25) frequency converter (16 that connects and be connected with described at least one motor, 16 '), for powering to described at least one motor and controlling described at least one motor.
3. system as claimed in claim 2, it is characterized in that, heat pump comprises a plurality of AC motors for compressor and fluid circulation pump (18a, 18b), each motor directly is connected with frequency converter (16,16 '), and each frequency converter is connected with the direct voltage output (24,25) of electronic commutator (4).
4. system as claimed in claim 3 is characterized in that, compressor has three phase electric machine and three-phase 400V AC frequency converter, and circulating device has single-phase 230V AC motor and single-phase or three-phase 230V AC frequency converter.
5. system as claimed in claim 3 is characterized in that, compressor and circulating device have three-phase 400V motor and frequency converter.
6. such as the described system of one of claim 1-5, it is characterized in that comprising the energy storage system (5) that contains thermal energy storage body (30).
7. such as one of aforementioned claim described system, it is characterized in that AC-DC/DC electronic commutator (4) comprises the low pressure output that is arranged to transducer, valve, automatics and electronic installation power supply, exports such as the 24V direct current.
8. such as one of aforementioned claim described system, it is characterized in that, the AC-DC/DC electronic commutator is arranged to and carries out AC-DC conversion and DC-DC conversion, the AC-DC conversion is the voltage commutation that exchanges public electric wire net to be worth the direct voltage higher than line voltage, and DC-DC conversion is the direct current dc voltage high voltage of dc voltage value of being converted to of photovoltaic panel after than the conversion of public electric wire net, and these two kinds of conversions provide two current sources.
9. such as the described system of aforementioned claim, it is characterized in that, the AC-DC/DC electronic commutator is arranged to and carries out AC-DC conversion and DC-DC conversion, AC-DC conversion is a voltage commutation that exchanges public electric wire net the direct voltage of 540V DC and 310V DC, and the DC-DC conversion is converted to voltage than the high 5-30% of DC direct voltage after the conversion of 400V AC/230V AC public electric wire net to the DC direct voltage of photovoltaic panel (3).
10. system as claimed in claim 8 or 9 is characterized in that, two current sources are connected with the power supply (34) of frequency converter and are connected in parallel by power supply protection diode D1, D2.
11., it is characterized in that AC-DC/DC electronic commutator (4) is changed for DC/DC and used average frequency to be the push-pull type pulse width modulating technology of 100kHz such as one of aforementioned claim described system.
12. such as one of aforementioned claim described system, it is characterized in that AC-DC/DC electronic commutator (4) comprises transformer, this transformer is configured to reach about 49% duty ratio by the voltage/current feature according to photovoltaic solar panel.
13. as the described system of one of aforementioned claim, it is characterized in that AC-DC/DC electronic commutator (4) comprises the protection of the overvoltage the when dc voltage to transducer surpasses 800V DC.
14. such as claim 1,2,3 or 4 described systems, the photovoltaic solar panel for being lower than 3kW is characterized in that, the AC-DC/DC electronic commutator comprises:
-three-phase 400V AC/230V AC the input (21,22) that is connected with public electric wire net;
The dc voltage input (23) of-150V DC to the 250V DC that is connected with photovoltaic solar panel;
The Voltage-output (24) of-550V DC to the 800V DC that is connected with the frequency converter (16) of compressor (14);
The Voltage-output (25) of-350V DC to the 450V DC that is connected with the frequency converter (16 ') of circulating device (18a, 18b);
-be used for exporting to the 24V dc voltage of valve, automatics and electronic installation power supply;
-for the DC/DC 0-10V simulation output of measuring grid power;
-for the 0-10V simulation output of measuring solar power.
15. such as claim 1,2,3 or 4 described systems, the photovoltaic solar panel for 3-10kW is characterized in that, the AC-DC/DC electronic commutator comprises:
-three-phase 400V AC/230V AC the input (21,22) that is connected with public electric wire net;
The dc voltage input (23) of-600V DC to the 800V DC that is connected with photovoltaic solar panel;
The Voltage-output (24) of-600V DC to the 800V DC that is connected with the frequency converter (16) of compressor (14);
The Voltage-output (25) of-350V DC to the 450V DC that is connected with the frequency converter (16 ') of circulating device (18a, 18b);
-be used for exporting to the 24V dc voltage of valve, automatics and electronic installation power supply;
-for the DC/DC 0-10V simulation output of measuring grid power;
-for the 0-10V simulation output of measuring solar power.
16. such as claim 1,2,3 or 5 described systems, the photovoltaic solar panel for greater than 10kW is characterized in that, the AC-DC/DC electronic commutator comprises:
-three-phase 400V AC/230V AC the input (21,22) that is connected with public electric wire net;
The dc voltage input (23) of-600V DC to the 800V DC that is connected with photovoltaic solar panel;
-be connected 18a, 18b with circulating device with the frequency converter (16) of compressor (14)) the Voltage-output (24) of 600V DC to the 800V DC that is connected of frequency converter (16 ');
-be used for exporting to the 24V dc voltage of valve, automatics and electronic installation power supply;
-for the DC/DC 0-10V simulation output of measuring grid power;
-for the 0-10V simulation output of measuring solar power.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH0762/10 | 2010-05-17 | ||
| CH00762/10A CH703162A1 (en) | 2010-05-17 | 2010-05-17 | energy recovery system renewable. |
| PCT/IB2011/052118 WO2011145034A2 (en) | 2010-05-17 | 2011-05-13 | System for recovering renewable energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102959820A true CN102959820A (en) | 2013-03-06 |
Family
ID=44629116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800314003A Pending CN102959820A (en) | 2010-05-17 | 2011-05-13 | System for recovering renewable energy |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP2572425A2 (en) |
| CN (1) | CN102959820A (en) |
| CH (1) | CH703162A1 (en) |
| FR (1) | FR2960099A1 (en) |
| MA (1) | MA34316B1 (en) |
| WO (1) | WO2011145034A2 (en) |
| ZA (1) | ZA201209547B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676889A (en) * | 2013-12-03 | 2015-06-03 | 北京航空航天大学 | Solar photovoltaic heat-pump water heater without storage battery |
| CN105604126A (en) * | 2014-11-18 | 2016-05-25 | Ls产电株式会社 | System for water supply using sunlight |
| US20220196251A1 (en) * | 2020-12-22 | 2022-06-23 | Premier Energy Holdings, Inc. | Device and Method for Converting Solar PV Energy into Thermal Energy Storage Using Combined Heat-Pump and Resistive Heating Elements in Water Heater |
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| JP6165867B2 (en) | 2012-09-21 | 2017-07-19 | 天津市格瑞思機電新技術有限公司Ｔｉａｎｊｉｎ Ｇｅｒｕｉｓｉ Ｎｅｗ Ｔｅｃｈｎｏｌｏｇｙ Ｏｆ Ｍｅｃｈａｎｉｃａｌ Ａｎｄ Ｅｌｅｃｔｒｉｃａｌ Ｃｏ．Ｌｔｄ | Public water supply pipe network system for source side water and middle water of local geothermal heat pump system |
| WO2016075614A1 (en) | 2014-11-10 | 2016-05-19 | Ren4Water Impact | System and method for pasteurizing a liquid |
| CN106247645B (en) * | 2016-08-30 | 2018-07-27 | 湖南中大经纬地热开发科技有限公司 | Water resource heat pump terrestrial heat utilization system applied to constant temperature swimming pool |
| ES2635647B2 (en) * | 2017-04-17 | 2018-04-24 | Ecoforest Geotermia, S.L. | SYSTEM AND METHOD OF USE OF ELECTRICAL ENERGY EXCEDENTS FROM AN INSTALLATION WITH RENEWABLE ELECTRICAL GENERATION |
| FR3065516A1 (en) * | 2017-04-21 | 2018-10-26 | Accenta | DEVICE FOR ENERGY MANAGEMENT OF A BUILDING |
| AU2017426195B2 (en) * | 2017-08-03 | 2019-10-10 | Dalian University Of Technology | PVT heat pump system capable of realizing divided daytime and night-time heat, power and cooling supply by means of solar radiation and sky cold radiation |
| FR3113313B1 (en) | 2020-08-05 | 2023-03-24 | Accenta | Method and installations for supplying energy, in particular thermal energy, in at least one building or the like, and system relating thereto |
| FR3120935B1 (en) | 2021-03-19 | 2023-08-11 | Accenta | Method for controlling an installation connected to a geothermal source to supply thermal energy in at least one building, installation and regulation system relating thereto. |
| FR3137744A1 (en) | 2022-07-05 | 2024-01-12 | Accenta | Method and installation for providing energy, particularly thermal, low carbon, in at least one building or the like, and system relating thereto. |
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| CN105604126A (en) * | 2014-11-18 | 2016-05-25 | Ls产电株式会社 | System for water supply using sunlight |
| US20220196251A1 (en) * | 2020-12-22 | 2022-06-23 | Premier Energy Holdings, Inc. | Device and Method for Converting Solar PV Energy into Thermal Energy Storage Using Combined Heat-Pump and Resistive Heating Elements in Water Heater |
| US11867412B2 (en) * | 2020-12-22 | 2024-01-09 | Premier Energy Holdings, Inc. | Device and method for converting solar PV energy into thermal energy storage using combined heat-pump and resistive heating elements in water heater |
Also Published As
| Publication number | Publication date |
|---|---|
| MA34316B1 (en) | 2013-06-01 |
| WO2011145034A3 (en) | 2013-01-03 |
| EP2572425A2 (en) | 2013-03-27 |
| CH703162A1 (en) | 2011-11-30 |
| FR2960099A1 (en) | 2011-11-18 |
| WO2011145034A2 (en) | 2011-11-24 |
| ZA201209547B (en) | 2013-08-28 |
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Application publication date: 20130306 |