CN108119972A - A kind of composite power water-cooling device and composite power water-cooling device control method - Google Patents
A kind of composite power water-cooling device and composite power water-cooling device control method Download PDFInfo
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- CN108119972A CN108119972A CN201711415461.5A CN201711415461A CN108119972A CN 108119972 A CN108119972 A CN 108119972A CN 201711415461 A CN201711415461 A CN 201711415461A CN 108119972 A CN108119972 A CN 108119972A
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- motor
- engine
- generator
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- antigravity
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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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
- F25B41/30—Expansion means; Dispositions thereof
Abstract
The invention discloses a kind of composite power water-cooling device and composite power water-cooling device control methods, which is characterized in that including dynamic power system unit and handpiece Water Chilling Units, dynamic power system unit includes engine and generator, wherein the two transmission shaft is connected；Handpiece Water Chilling Units include motor, compressor and the evaporator being connected with compressor suction duct and the condenser being connected with compressor exhaust pipe, for chilled water；Generator, engine, motor and compressor are directly connected in series successively, wherein the transmission axis connection of the transmission shaft of compressor and motor；The both ends of engine and motor are respectively provided with outwardly directed transmission shaft, and the transmission shaft of engine is connected with the transmission shaft of motor by coupling device.The composite power water-cooling device and control method can use electric power and fuel, realize the mutual supplement with each other's advantages of electric power and fuel, and there are many operational mode, efficiency of energy utilization is high, possesses significant economic benefit and social benefit.
Description
Technical field
The present invention relates to fuel gas generation and refrigerating field more particularly to a kind of composite power water-cooling device and composite power are cold
Water installations control method.
Background technology
With natural gas widely using in city, there is the energy source station of cold-hot-Electricity Federation production in many areas at present, can be with
Refrigeration, heat supply are provided（Heating and supplying hot water）And supply of electric power, use explosive motor or gas turbines driving generators
Unit generates electricity, and the high-temperature tail gas and hot water supply absorption chiller of the discharge that generates electricity freeze.
For the energy source station based on summer central cooling, refrigeration duty is much larger than heating demand, it is necessary to use and generate electricity again
Handpiece Water Chilling Units are driven, undertake most of cooling load, and absorption chiller only provides auxiliary cooling.This refrigerating operaton
Pattern, gas thermal energy are first converted into mechanical energy, are then converted to electric energy, are finally converted into the mechanical energy of compressor, energy by electric energy again
Source repeats to convert, and efficiency is low, and system complex, takes up a large area, and is only suitable for large scale system.
In addition：
The Chinese patent of Publication No. 102563970A（Application No. 201210042712.0）Disclose a kind of alternating current, combustion
Mechanism of qi parallel connection double drive water-cooling device, in the program, electric motor units, gas engine are complicated using belt pulley parallel way, adopt
It is low with belt pulley machinery driving efficiency, and without generating function；When freezing in addition, the high-grade smoke heat energy of gas engine discharge
It does not utilize, it is impossible to change into low-temperature receiver, combustion gas refrigerating efficiency is low.
In the Chinese patent of Publication No. 106969529A（Application No. 201710356192.3）, High-efficiency Gas refrigeration
Device directly drives compressor using single gas turbine, and during refrigeration, the high-grade smoke heat energy of gas engine discharge passes through suction
Receipts formula refrigeration module recycling refrigeration, combustion gas refrigerating efficiency is higher, but compressor does not have electric motor units driving, can only use combustion gas
Refrigeration, function is single, restricted application.And in engineering is actually used, the output power of gas turbine is larger, often
Using the centrifugal compressor that can generate larger refrigerating capacity, wheel speed is up to more than 10,000 turns, and internal structure cooperation is accurate, thus
To the stationarity of compressor input shaft, i.e. axial vibrations and radial direction shake more demanding.It and may in gas turbine operation
It is present with surge phenomenon, directly will influences compressor safe operation with gas power driving compressor, otherwise centrifugal compressor exists
Also can often occur surge under underload, can also influence the safe operation of gas turbine in turn.
The Chinese patent of Publication No. 105276856A discloses a kind of combustion gas cold water air conditioner（Application No.
201510254890.3）, engine driving compressor is used, while generator is driven, no motor-driven compressor function, knot
Structure is belt transmission, and function is more single, complicated.
The Chinese patent of Publication No. 1776328 discloses a kind of hybrid-power combustion-gas cooling water air conditioner and operating method（Shen
Please number be 200510122835.5）, in the program, also using motor and engine joint driving compressor, and refer to mix
Power set are closed using series system and parallel way, the so-called series system of the technical solution, be the one kind used electrically and
Series connection in control logic is first used engine power generation, then is had no directly with motor-driven compressor, engine and compressor
Mechanical connection；And wherein parallel way refers to：Engine can free band move compressor, motor also can free band move compressor, so
Driving compressor can be combined again afterwards.Therefore engine and compressor between motor and compressor, have independent machinery even respectively
Binding structure, it is then together in parallel again, it is complicated, so also being mentioned in specification：" parallel type hybrid dynamic is complicated,
The invention does not use ".
The Chinese patent of Publication No. 1862947 discloses a kind of combustion gas cold water independent energy supplying system based on permanent rotating speed
（Application No. 200610014290.0）, in the system, engine can drive compressor and generator simultaneously, with reference to the accompanying drawings,
Its structure is also direct-connected mode, but engine is arranged between compressor and generator, and compressor can only use engine to drive
It is dynamic, it is impossible to be driven using motor, function is single.
Therefore, it is necessary to design a kind of composite power water-cooling device and composite power water-cooling device control method.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of composite power water-cooling device and multi-mode cold water controlling party
Method, the composite power water-cooling device and multi-mode cold water control method flexibility are good, and floor space is small, easy to implement, can allow combustion
Gas and electric power ideally realize mutual supplement with each other's advantages, while Dual-energy source system has more strategic security.
The technical solution of invention is as follows：
A kind of composite power water-cooling device, including dynamic power system unit and handpiece Water Chilling Units；The dynamic power system unit includes
Engine and generator；The engine uses the internal combustion engine of combustion gas or fuel oil, can also use gas turbine, steam turbine,
Or gas turbine and steam turbine combining form, wherein combustion gas most preferably use natural gas.
The handpiece Water Chilling Units include motor, compressor and the evaporator being connected with compressor suction duct and with compression
The condenser of machine exhaust pipe connection for chilled water, specifically includes refrigerant, compressor, condenser, evaporator and throttling dress
It puts.Compressor using outer drive shafts drive, generally open-type centrifugal compressor or open-type helical-lobe compressor, condenser with
Throttling set is equipped between evaporator, refrigerant is subject to the compressible drive of compressor, make evaporator, condenser and compressor it
Between circulate, and generate phase transformation and temperature change.Low-temperature refrigerant exchanges heat with chilled water in evaporator, drops leaving water temperature
It is low；High temperature refrigerant and cooling water exchange heat in condenser, during cooling in summer, cooling water in condenser by cooling water pipeline and
The outer cooling tower of cooling pump junction chamber, river water source or underground water radiate, and chilled water is pumped by chilled water pipeline and freezing
Indoor end fan coil provides cold air for interior.
The generator and motor include stator, rotor and bearing, wherein stator include stator core and stator around
Group, the stator winding are made of multiple windings, and each winding is wrapped in same stator core position by conducting wire and is formed repeatedly；
Wherein generator, engine, motor and compressor are directly connected in series successively；The both ends of the engine and motor have
There is outwardly directed transmission shaft；Wherein engine driveshaft one end and generator drive gear axis connection, the engine driveshaft other end
It is connected by coupling device with the transmission shaft of motor, and the transmission shaft other end of motor is connected with compressor.
Allow engine, generator, motor and compressor four axis connect it is straight drive, more efficient, structure is simpler, more in
It safeguards.If internal combustion engine is when driving dynamotor output 50Hz three-phase alternating currents, some rotating speeds are 3000r/min, and existing are opened
It is 2950r/min to open drive motor rotating speed when 50Hz three-phase alternating-current supplies drive in the two poles of the earth used by formula compressor, the two
Rotating speed is essentially the same, so that above-mentioned straight drive is connected to become possibility.
Further, when the generator or motor stator, rotor and transmission shaft are in horizontally disposed, positioned at the hair
One or more antigravity Exciting Windings for Transverse Differential Protection are included in stator winding above motor or motor rotor；Or generator and motor
Simultaneously comprising one or more antigravity windings above rotor；The antigravity Exciting Windings for Transverse Differential Protection passes through in generator or motor stator
Increase extraction wire between sub- winding and obtain, the antigravity Exciting Windings for Transverse Differential Protection can be with other stator winding electricity by extraction wire
Qi leel is from forming the circuit of work of being independently powered, be also accessible in stator winding loops.
Main material is iron core in generator and motor rotor, when the antigravity Exciting Windings for Transverse Differential Protection is passed through electric current, energy
Generate the electromagnetic attraction of upward bob-weight force direction to the iron core in generator or motor rotor, which can allow generator
Motor shaft horizontally-supported bearing or together with engine and the horizontally-supported bearing of compressor transmission shaft, it is suffered
Pressure reduces or is zero straight down, and pattern is engine driving compressor at this time, and generator or motor do not generate electricity or do not drive
It is dynamic.
Since engine, generator, motor and compressor are to be horizontally mounted, and the moving component in four,
The weight of engine and motor rotor and transmission shaft is more with respect to what other component to be weighed, and what bearing generated when transmission shaft rotates rubs
It is only related with the radial pressure straight down that bearing is born to wipe power, and it is unrelated with the level of torque of compressor load and transmission shaft,
Once the pressure reduces even zero, frictional resistance when bearing rotates will be substantially reduced, while vibrations and noise can be reduced.This
Kind plain bearing adds rotor and the frame mode of antigravity Exciting Windings for Transverse Differential Protection, similar with magnetic bearing structure, can make bearing radially
The gravity that direction is born reduces even to zero, is equivalent under weightlessness, obtains the effect for being similar to magnetic suspension bearing.
Due to using generator, engine, compressor and the direct cascaded structure of motor, entire generator or electronic at this time
For machine not only into connection engine and the transmission shaft and flywheel of compressor, also becoming can support engine and compressor itself to be driven
The antigravity bearing of axis.And antigravity Exciting Windings for Transverse Differential Protection structure, need not on generator or motor body additional increased portion
Part, but have bearing, rotor and stator with reference to generator or motor, by optimizing stator winding, produce unique bob-weight
Power Exciting Windings for Transverse Differential Protection structure makes to have generator or motor becomes a huge antigravity bearing and a performance is more excellent
The antigravity inertial flywheel of matter.
The motor is also used as the power of dynamic power system unit starting：Before dynamic power system unit starting,
Motor is allowed to connect motor module, engine rotation is driven by motor；After engine start is completed, motor with
Motor module disconnects.
Further, coupling device is shaft joint or clutch.
Coupling device is mounted between engine and motor shaft, transfers the torque between transmission shaft,；Shaft joint is
Finger is connected two transmission shafts with ring flange and bolt, is a kind of fixed connection mode using shaft joint connection, is used
Clutch connection is a kind of flexible connection mode.
Coupling device uses electric control clutch or Mechanical controllable clutch, the mechanical clutch such as controlled manually.Clutch
It is nested respectively to be fixed on corresponding transmission shaft including driving disc spacing pressing and driven disc, when transmission control module control clutch is inhaled
During conjunction, driving disc spacing pressing and driven disc rotate synchronously so that two transmission shafts rotate synchronously；During clutch separation, two transmission shafts it
Between do not transfer torque.
Another coupling device is ring flange shaft joint, including driving disc spacing pressing, intermediate linkage section and driven disc, wherein intermediate connect
Flexible connection piece can be also equipped with by connecing the both sides of section, driving disc spacing pressing and driven disc respectively it is nested be fixed on corresponding to transmission shaft on；When
After being fixed between driving disc spacing pressing, flexible connection piece, intermediate linkage section and driven disc with bolt nut connection, driving disc spacing pressing and driven disc are same
Step rotates, and two transmission shafts is driven to rotate synchronously, otherwise removes bolt nut, two transmission shaft separation；Driving disc spacing pressing and driven
Dish structure is just the same to exchange.
Further, the speed change gear of conversion is additionally provided with for rotating speed or turned on the coupling device, when engine
When rotating speed or steering and the inconsistent rotating speed of compressor, make the two rotating speed by speed change gear or turn to reach consistent, generally adopt
With speed-changing gear box or belt sheave structure.
Further, the composite power water-cooling device further includes electric-control system；, including engine control module, power generation
Machine control module, motor control module and cooling-water machine control module；
（1）Engine control module is used to control the operation of engine；
（2）Alternator control modules include at least one of generator module and generator antigravity control module；
The generator module is connected with engine block and generator, for controlling the excitation of generator, and passes through engine
Module controls the rotating speed of engine, to external out-put supply；
The generator antigravity control module output terminal is connected with the lead of antigravity Exciting Windings for Transverse Differential Protection, input terminal connection external electrical
Source, including Energizing unit and switch unit；Wherein switch unit control antigravity Exciting Windings for Transverse Differential Protection and the connection of other stator winding
With separating；Energizing unit generates electricity at this time for external power supply to be controlled to provide power supply for the antigravity Exciting Windings for Transverse Differential Protection of generator unit stator
Machine is operated in antigravity bearing pattern；When alternator control modules need generator operation, by antigravity control module
Switch unit, cut off and antigravity Exciting Windings for Transverse Differential Protection or antigravity Exciting Windings for Transverse Differential Protection be restored in the stator winding of generator；
（3）Motor control module includes at least one of motor module and motor antigravity control module.
The motor module is for controlling external power supply as motor, output terminal connection motor, motor
The input terminal connection external power supply of module, for obtaining electric energy from external power supply as the motor in motor；Motor
Frequency-adjustable power supply also can be used in module, can be according to compressor load adjust automatically motor speed.The electricity generation module it is defeated
Enter end to be connected with motor, the output terminal of electricity generation module is connected with external power load；For the electric energy for generating dynamotor
It is output to external loading, external loading such as lighting unit etc..
The motor antigravity control module output terminal is connected with the lead of antigravity Exciting Windings for Transverse Differential Protection, and input terminal connection is outer
Portion's power supply, including Energizing unit and switch unit；Wherein switch unit control antigravity Exciting Windings for Transverse Differential Protection and other stator winding
It connects with separating；Energizing unit is for controlling external power supply to provide power supply for the antigravity Exciting Windings for Transverse Differential Protection of motor stator, at this time
Electric motor operation is in antigravity bearing pattern；When motor control module needs electric motor operation, mould is controlled by antigravity
Switch unit in the block cuts off antigravity Exciting Windings for Transverse Differential Protection or antigravity Exciting Windings for Transverse Differential Protection is restored in the stator winding of motor.
Motor module and electricity generation module, which can also integrate, is combined into a motor control module.
（4）The cooling-water machine control module is connected with cooling-water machine, controls its operation.
（5）When coupling device uses electric control clutch, electric-control system further includes that clutch is controlled to connect and separate
Transmission control module.Transmission control module coupling device connects, it is controlled to connect and separate.
Interrelated control can be carried out between modules in electric-control system, is such as changed according to compressor load, cold water
Machine control module can pass through the rotating speed of engine control module adjust automatically engine；Or electricity generation module can according to power load,
The fuel duty of engine is adjusted by engine control module.
Electric-control system can be connected with external communications units；External communications units are used at the scene or remote control control is automatically controlled
System.Such as by live Fieldbus Control electric-control system or pass through long distance wireless（3G, 4G or 4G etc.）It is or wired（Yin Te
Net）Control electric-control system.
Further, antigravity Exciting Windings for Transverse Differential Protection is independently arranged winding in generator or motor stator.
Further, the composite power water-cooling device further includes absorption installation；The row of absorption installation and engine
Tracheae or cooling water pipe are connected；The flue gas and the waste heat of cooling water that absorption installation is discharged by engine freeze.It absorbs
Formula unit can also be carried combustion gas and be aided in using single cold flue gas type or hot-water type.
Further, coupling device also is provided between engine and generator, which can be shaft joint or clutch
Device is also controlled by electric-control system when use clutch；When engine is run, and generator does not generate electricity, which breaks
It opens.
A kind of composite power water-cooling device control method, using foregoing composite power water-cooling device；Control multi-mode cold
Water is operated in following any operative pattern：
（1）Compressor is operated alone in pattern 1, engine；
The coupling device of engine and motor is connected, generator and external circuit are disconnected, optionally by generator and power generation
Machine antigravity control module is connected；Motor and external circuit are disconnected, optionally control motor and motor antigravity
Module is connected, the optional coupling device for disconnecting generator and engine；Engine is run, the transmission shaft of engine synchronously drives
Generator amature, motor rotor and compressor, engine and motor rotor are in passive idling conditions；
（2）Compressor is operated alone in pattern 2, electric power
The coupling device of engine and motor is disconnected, engine does not work；Motor source in motor access electric-control system
Module passes through motor driven compressor；
（3）Pattern 3, engine combine driving compressor with electric power
The coupling device of engine and motor is connected, generator and external circuit are disconnected, optionally by generator and power generation
Machine antigravity control module is connected, the optional coupling device for disconnecting generator and engine；Run engine, motor access
Motor module, and connected with external power supply, engine combines driving compressor with motor；At engine and motor rotor
In passive idling conditions；
（4）Pattern 4, engine driving compressor simultaneously drive electrical power generators
Connect the coupling device of engine and motor；Motor and external circuit are disconnected, optionally by motor with it is electronic
Machine antigravity control module is connected；Engine is run, it is synchronous to drive engine and motor rotor and compressor；Generator accesses
Electricity generation module conveys electric energy to external power load；Motor rotor is in passive idling conditions；
（5）Single operation absorption installation
Engine, generator, motor, Compressor Group, do not work, single to absorption installation input combustion gas, fuel or steaming
Vapour allows absorption installation to freeze；
（6）Pattern 6, single-shot electricity output
The coupling device of generator and motor is disconnected, motor does not work, generator access electricity generation module；Run engine,
Generator is driven, by electricity generation module, electric energy is conveyed to external power load.
Further, the multi-mode cold water control method further includes UTILIZATION OF VESIDUAL HEAT IN pattern；In pattern 1,3,4,6,
Increase absorption installation in multi-mode cold water；The flue gas and cooling water supply absorption installation of engine discharge, can carry to outside
For cold water.
Advantageous effect：
The invention discloses a kind of composite power water-cooling device and multi-mode cold water control methods.
This invention simplifies the cold-electric-thermal co-generation systems being widely used at present, improve system effectiveness, reduce occupation of land face
Product, and wide adaptability, make full use of external electrical network time-of-use tariffs, can reduce operating cost, while can also improve outside summer
The stability of power grid allows combustion gas and electric power to realize have complementary advantages, while Dual-energy source system is more safe and efficient.Main wound of the invention
New point is as follows：
1. one of present invention innovation：Rotor simplifies when transmission flywheel, system.
When only using engine driving compressor, common idea will be considered that motor is to no avail at this time, so all adopting
Motor and engine and compressor are departed from complicated device, and in the present invention by engine, generator, motor
Directly connect with the transmission shaft of compressor, when individually using combustion gas refrigeration, engine must first drive motor, then drive pressure
Contracting machine, at this time motor do not generate power, seem extra, completely outstripped the common usage of motor, however by starting
The reapective features of mechanical, electrical motivation and compressor are found after having done in-depth analysis：
Cooling water air conditioner compressor, all using centrifugal compressor, the impeller in centrifugal compressor turns especially high-power handpiece Water Chilling Units
Up to more than 10,000 turns of speed, internal structure cooperation is very accurate, to the stationarity of transmission shaft, i.e. axial vibrations and radially vibrations requirement
It is very high.Engine it is more common have combustion gas or fuel engines, gas turbine, steam turbine, wherein engine speed is relatively low, by more
A piston-cylinder is alternately promoted and compared with motor drive, and output torque has certain pulsating nature, and there are a certain amount of axial directions
It is shaken with radial direction, is even present with pinking sometimes；Gas turbine and turbine speed are higher, but in operation load variations when very
Difficulty has avoided existing surge phenomenon, and output shaft will necessarily also have strenuous vibration.
If therefore directly driving centrifugal compressor with engine, under existing process, due to engine be unable to reach with it is electronic
The same stationarity of machine, the components such as quick runner, high-speed bearing will be unable to bear the vibrations of engine in air-conditioning centrifugal compressor,
And air-conditioning centrifugal compressor is also present with surge at low load in itself, can also influence the safe operation of engine in turn,
This is also one of the reason for technology is currently without real application.
However increase the motor of a Same Efficieney in the present invention between compressor of air conditioner and engine, due to electronic
Machine stator winding open circuit, no current, for stator to rotor without torque, rotor is in free state, during by engine driving, only only has
A small amount of rotor bearing frictional force.Engine and during the passive high-speed rotation of motor rotor simultaneously, is equivalent in compressor of air conditioner
Increase an inertial flywheel between engine, and by two groups of bearings before and after motor, can firmly locked rotor axis
Moved to displacement and radial displacement, can just fully absorb the vibrations of engine, ensure to input to the torque of compressor axial and
Radial direction it is steady, isolate so as to form good buffer in compressor and engine, stationarity can reach and motor direct driving
Dynamic compressor of air conditioner equivalent effect.
Therefore the way for not conforming to convention is seemed, is in fact built upon and really to understand centrifugal compressor, engine, motor
Used best-of-breed technology scheme on work characteristics basis is the innovation place of the present invention.Though motor is not used at this time
Conventional electrical characteristic, but cleverly make use of the mechanical structure of motor, motor rotor is allowed passively to dally, engine with
It is served as between centrifugal compressor with buffering, the inertial flywheel stablized.It is using engine and motor parallel compared with other
System separates motor when there is engine driving compressor, complicated although the friction of motor idle running can be reduced, real
It is poor with property.And the layout structure of mechanical series is used to realize that heat power machine directly drives rotary power and loads, transmission efficiency, not only just
Rotary power load is operated alone in motor, also allows for heat power machine Independent Power Generation, makes whole device simple and reliable for structure, simultaneously
It can facilitate and graft existing and very ripe fuel generator and rotary power load technology, there is the present invention practical well
Property.
The two of innovation of the invention：Generator, motor are transformed into antigravity bearing, system high efficiency.
Compared with other using the system of engine and motor parallel, when there is engine driving compressor by motor point
From although the friction of motor idle running, complicated, poor practicability can be reduced.And use the layout structure of mechanical series real
Existing heat power machine directly drives rotary power load, and transmission efficiency is not only convenient for motor and rotary power load is operated alone, also allows for
Heat power machine Independent Power Generation, makes whole device simple and reliable for structure, while can facilitate and graft existing and very ripe fuel hair
Motor and rotary power load technology make the present invention have good practicability.
By increasing extraction wire in generator or motor stator, one group or more is isolated in stator winding top
Group winding is individually powered as antigravity Exciting Windings for Transverse Differential Protection, and to it, and using stator core and rotor core, forming one can be by
The electromagnet structure that rotor up attracts by controlling electric current, enables electromagnetic attraction size to allow generator or electric-motor drive
The horizontally-supported bearing of axis subtracts together with the pressure straight down suffered by the horizontally-supported bearing of engine and compressor transmission shaft
It is small or be zero.
Since engine, generator, motor and compressor are horizontal installation, and the moving component in four,
The weight of engine and motor rotor and transmission shaft is more with respect to what other component to be weighed, and what bearing generated when transmission shaft rotates rubs
It is only related with the radial pressure straight down that bearing is born to wipe power, and it is unrelated with the level of torque of compressor load and transmission shaft,
Once the pressure reduces even zero, frictional resistance when bearing rotates will be substantially reduced, while vibrations and noise can be reduced.
This plain bearing adds rotor and the frame mode of antigravity Exciting Windings for Transverse Differential Protection, energy similar with magnetic bearing structure
The gravity that bearing radial direction is born is made to reduce even to zero, is equivalent under weightlessness, acquisition is similar to magnetic suspension shaft
The effect held.Due to using engine, generator, motor and the direct cascaded structure of compressor, entire motor is not only at this time
Into connection engine and the transmission shaft and flywheel of compressor, when coupling device is using being rigidly connected, hair can be supported by also becoming
The antigravity bearing of motivation and compressor itself transmission shaft, thus the entirety of this generation antigravity effect is named as antigravity
Bearing.Generator or motor become bearing, and antigravity Exciting Windings for Transverse Differential Protection structure seems very complicated, but in fact and need not be in engine
Increase component with additional again on motor body, bearing, rotor and stator are all that engine and motor itself are existing, simply
By optimizing stator winding, increase extraction wire, produce unique antigravity Exciting Windings for Transverse Differential Protection structure, make to have engine and electronic
Machine becomes a huge antigravity bearing and a more good zero-g inertial flywheel, and cost only has magnetic suspension shaft
The some thousandths of held, this is exactly the ingenious part of the present invention.
When generator or motor need to recover power generation and driving function, pass through the switching list in antigravity control module
Member switches over the lead of antigravity Exciting Windings for Transverse Differential Protection, and antigravity Exciting Windings for Transverse Differential Protection is restored to generator or motor immediately
In stator winding.
The present invention has advantage following prominent：
1. reducing operating cost, perfection realizes that combustion gas is complementary with power price.
For much use tou power price user, when daytime power grid be in wave crest, when electricity price is high, more passed through using combustion gas
During Ji, pass through gas driven air-conditioning or power generation；When night power grid is in wave crest, when electricity price is relatively low, passes through electric power and motor drives
Air-conditioning.It can not only lower user's operating cost, but also pair can stablize network load, lower operation of power networks and administration fee.
2. reduce investment of equipment
Present many central air conditioner users, such as hospital, hotel, megastore, central air conditioner room and generator are all independent marks
Match somebody with somebody, by the invention it is possible to which saving user buys generator unit expense and the construction cost of installation and computer room.
3. energy security, constructed Dual-energy source even multiple-energy-source framework, can reduce energy risk.
When hotel of hospital is when occasions, once having a power failure, gas driven the system may be employed, not only can ensure air-conditioning just
Often operation, moreover it is possible to further provide power supply for illumination etc.；When compressor of air conditioner and power generation are run simultaneously, generating electricity can also drive
The auxiliary devices such as water pump, the wind turbine of central air conditioner system allow entire Air Conditioning Facilities that can depart from external electrical network operation.The sky of building
Load is adjusted to typically constitute from more than the 60-70% of building electricity consumption load, once air-conditioning system can not depend on external electrical network, with reference to this hair
Bright generating function, just meaning whole building can not depend on external electrical network yet, while in addition to available natural gas, engine
The energy such as fuel oil, bio-fuel can also be used, can so greatly improve energy strategy security.
3. realize energy classified utilization, it is efficient.
The high-grade thermal energy that combustion gas or fuel oil are generated by engine combustion is converted into mechanical energy, directly drives compression mechanism
It is cold, substantial amounts of high-temperature residual heat flue gas and cooling water are generated, the recycling of supply absorption installation is freezed again.It is adopted compared with the prior art
To be freezed with combustion gas directly to unit is absorbed, using energy source is much higher, thus with significant economic benefit and huge society
Benefit.
4. operation simple in structure is flexible.
Cascaded structure makes simple system, by the simple switching of clutch, can realize plurality of operating modes in systems：
（1）Compressor is operated alone by engine；（2）Engine is disconnected, compressor is operated alone by electric power by electric motor units；（3）
Engine and electrode unit drive compressor jointly.
In addition, under the cooperation of speed change gear, the matched well of compressor and a variety of actuating units can be realized, so that
Each equipment can be operated in optimum state, realize economy and the stable operation of whole system.
Further, the present invention also has more than ten kinds of operating condition, and therefore, flexibility is extremely strong.
Description of the drawings
Fig. 1 is the general structure schematic diagram of composite power water-cooling device；
Fig. 2 connects schematic diagram for coupling device；
Fig. 3 is the separated schematic diagram of coupling device；
Fig. 4 is electric-control system schematic diagram；
Fig. 5 is the schematic diagram that generator unit stator is in generator mode；
Fig. 6 is the schematic diagram that motor stator is in electric motor mode；
Fig. 7 is the schematic diagram that generator unit stator is in the control of antigravity module；
Fig. 8 is the schematic diagram that motor stator is in the control of antigravity module；
Fig. 9 is generator and electric motor structure schematic diagram；
Figure 10 connects schematic diagram for flange shaft joint；
Figure 11 is the separated schematic diagram of flange shaft joint；
Figure 12 is state diagram when coupling device is set with speed change gear；
Figure 13 is the water-cooling device embodiment schematic diagram with absorption installation；
Figure 14 is engine driving compressor mode schematic diagram；
Figure 15 is motor driven compressor pattern diagram；
Figure 16 is engine and motor joint driving compressor mode schematic diagram；
Figure 17 is engine driving compressor synchronous generator schematic diagram；
Figure 18 is absorption installation refrigeration output mode schematic diagram；
Figure 19 is engine driving power generation mode schematic diagram；
Figure 20 band coupling device schematic diagrames between generator and engine.
Specific embodiment
The present invention is described in further details below with reference to the drawings and specific embodiments：
Internal combustion engine, gas turbine, steam turbine or the gas turbine and steam of combustion gas or fuel oil can be used in engine described first
Turbine combining form, wherein combustion gas most preferably use natural gas.
Embodiment 1：Such as Fig. 1, in composite power water-cooling device, including dynamic power system unit, handpiece Water Chilling Units and automatically controlled system
System, wherein dynamic power system unit include engine 1, generator 2, and wherein engine 1 is with double transmission shafts for stretching power output
201；Wherein handpiece Water Chilling Units include motor 3 and compressor 40, condenser 41, evaporator 42 and throttling set 43, and the compression
Machine is driven using outer drive shafts 301.Compressor 40, condenser 41, evaporator 42 and throttling set 43 are sequentially connected to form ring
Road.Wherein motor 3 uses Double shaft-extension structure, and one end transmission shaft is connected with compressor, and other end transmission shaft 301 is filled by connecting shaft
5 are put to be connected with the transmission shaft 201 of engine 1.
It is respectively that coupling device 5 is connected and separated schematic diagram with reference to Fig. 2 and Fig. 3.
With reference to Fig. 4, electric-control system includes engine control module, cooling-water machine control module, motor module, power generation mould
The antigravity control module of block, generator and motor, transmission control module.Wherein engine control module connects with engine 1
It connects, controls its operation.Wherein cooling-water machine control module control compressor 40 is run.The wherein output terminal connection electricity of motor module
Motivation 3, the input terminal connection external power supply of motor module.The input terminal of electricity generation module is connected with generator 2, electricity generation module
Output terminal is connected with external power load.
With reference to Fig. 5, Fig. 7, Fig. 9, generator includes transmission shaft 201, rotor 20, wherein stator winding 21, generator bob-weight
Power module includes Energizing unit and switch unit, and output terminal is connected to the antigravity excitation at the top of generator unit stator winding
Winding 211, input terminal connection external power supply.
With reference to Fig. 6, Fig. 8, Fig. 9, motor includes transmission shaft 301, rotor 30, wherein stator winding 31, motor bob-weight
Power module includes Energizing unit and switch unit, and output terminal is connected to the antigravity excitation at the top of motor stator winding
Winding 311, input terminal connection external power supply.Wherein transmission control module is connected with coupling device 5, it is controlled to connect and divide
From.
Coupling device 5 is using electric control clutch in the present embodiment, and including driving disc spacing pressing and driven disc, nesting is fixed on respectively
On corresponding transmission shaft, when transmission control module control clutch is attracted, driving disc spacing pressing and driven disc rotate synchronously, and drive
Two transmission shafts rotate synchronously, and vice versa.Driving disc spacing pressing and driven dish structure are completely the same, can exchange.
The power that motor 3 can start as engine 1：Before the startup of engine 1, motor 2 is allowed to connect motor
Module drives engine 1 to rotate by motor 3；After 1 start completion of engine, motor 3 breaks with motor module
It opens.
Embodiment 2
Difference lies in motor module uses the power supply of frequency-adjustable, can be automatic according to 40 load of compressor with embodiment 1
Adjust the rotating speed of motor 3.
Embodiment 3
With reference to Figure 10 and Figure 11, difference lies in coupling device 5 is connected using the ring flange of no transmission control module with embodiment 1
Axis device, including 501, two sets of flexible connection pieces 502 of driving disc spacing pressing, intermediate linkage section 503, driven disc 504, connection bolt 505 and spiral shell
Cap 506.Several through holes are provided on driving disc spacing pressing 501, flexible connection piece 502, intermediate linkage section 503 and driven disc 504, can be passed through
Bolt.Pass through 505 nut 506 of bolt alternating and driving disc spacing pressing 501 and intermediate linkage section 503 on wherein a set of flexible connection piece 502
It is fixed；It is alternately solid with driven disc 504 and intermediate linkage section 503 by 505 nut 506 of bolt on another set of flexible connection piece 502
It is fixed.When being connected between driving disc spacing pressing 501, flexible connection piece 502, intermediate linkage section 503 and driven disc 504 with 505 nut 506 of bolt
After fixation, driving disc spacing pressing 501 and driven disc 504 rotate synchronously, and two transmission shafts is driven to rotate synchronously；Otherwise remove bolt 505
Nut 506, two transmission shaft separation；Driving disc spacing pressing 501 and 504 structure of driven disc is just the same to exchange.
Embodiment 4
Difference lies in using the ring flange shaft joint of no transmission control module, but without flexibility with embodiment 1 and embodiment 3
Connection sheet 502.
Embodiment 5
With reference to Figure 12, difference lies in be additionally provided with for rotating speed on coupling device 5 or turn to the speed change converted with embodiment 1
Device 6, speed change gear 6 are located at 3 one side of motor of coupling device 5, may be alternatively located at 1 one side of engine.
Embodiment 6
With reference to Figure 13, difference lies in further include absorption installation, absorption installation is using single flue gas type or warm with embodiment 1
When engine 1 is in operating status, engine exhaust heat refrigeration, the exhaust of absorption installation and engine can be used in water type cold mould
Pipe or cooling water pipe are connected；The flue gas and the waste heat of cooling water that absorption installation is discharged by engine 1 freeze.In addition inhale
Receipts formula unit can also carry combustion gas and aid in, and can not depend on waste heat, directly be freezed using combustion gas.
Embodiment 7
Difference lies in motor module, electricity generation module and its correspondence antigravity control module are integrated into an electricity with embodiment 1
Machine control module.
According to above-described embodiment, the present apparatus is by engine 1, generator 2, motor 3, coupling device 5 and electric-control system group
Into, can cooling in summer, winter heating and power generation, operating method is as follows：
Pattern 1, engine driving compressor
With reference to Figure 14, coupling device 5 is connected, the antigravity Exciting Windings for Transverse Differential Protection 211 of generator 2 and antigravity control module are connected,
The antigravity Exciting Windings for Transverse Differential Protection 311 of motor 3 is connected with antigravity control module.
Run engine 1, transmission shaft motor-torgue generator rotor 30, motor rotor 20 and the compressor of engine 1
40, generator and motor are in the passive idling conditions of rotor, and two rotors are run as flywheel.20 He of generator amature
Transmission shaft is subject to the electromagnetic attraction of top antigravity Exciting Windings for Transverse Differential Protection 211, makes the radial pressure suffered by the bearing 22 on transmission shaft
Reduce or be zero, reduce 22 frictional resistance of bearing and noise；Motor rotor 30 and transmission shaft are subject to top antigravity to encourage simultaneously
The electromagnetic attraction of magnetic winding 311 makes radial pressure suffered by the bearing 32 on transmission shaft reduce or be zero, reduces bearing 32
Frictional resistance and noise.
Pattern 2, power driven compressor
With reference to Figure 15, coupling device 5 is allowed to separate, motor 3 accesses motor module, and external power supply transmission of electricity is driven by motor 3
Dynamic compressor 40 is run, and generator and engine do not work.
Pattern 3, engine combine driving compressor with electric power
With reference to Figure 16, coupling device 5 is connected, the antigravity Exciting Windings for Transverse Differential Protection 211 of generator 2 and antigravity control module are connected,
Motor 3 accesses motor module, and is connected with external power supply, runs engine 1, driving compressor 40 is combined with motor 3
Operation, generator amature are in passive idling conditions.
Pattern 4, engine driving compressor synchronous generator
With reference to Figure 17, coupling device 5 is connected, antigravity Exciting Windings for Transverse Differential Protection 311 and the motor antigravity control module of motor 3 connect
It is logical.Generator 2 accesses electricity generation module, and electric energy is conveyed to external power load by electricity generation module.
Engine 1 is run, driving compression 40 is run, and motor is in the passive idling conditions of rotor.When compressor 40
Load it is relatively low when, engine 1 is also at underrun, and especially for gas turbine, part load efficiency is very low, passes through increase
Power generation output improves the load of engine, it is kept to be in high-efficiency operation always.
In addition in the application of actual computer room, air-conditioning system also needs to configuration chilled water pump and cooling water pump and cold air tower
Supplementary power devices are waited, they account for 30% or so of computer room power consumption.
Under the pattern, electricity can be conveyed to computer room internal-external power supply, directly transport water pump, make rectification computer room
The constraint of public external power supply is completely free of, makes the device that there is high independence.
Pattern 5, single operation absorption installation
With reference to Figure 18 engines, generator, motor, Compressor Group, do not work, it is single to absorption installation input combustion gas,
Fuel or steam, allow absorption installation operation to freeze or heat, and cold water or hot water are provided to outside；
Pattern 6, single-shot electricity output
With reference to Figure 19, coupling device 5 is allowed to separate, generator 2 accesses electricity generation module, and compressor does not work；Engine 1 is run, is driven
Dynamic generator 2 generates electricity, and electric energy is conveyed to external power load by electricity generation module.
Embodiment 9
With reference to Figure 20, coupling device 5 also is provided between engine 1 and generator 2.When engine 1 does not drive generator 2 to generate electricity
When, which can be disconnected, generator 2 is allowed not rotate.
It these are only the preferred embodiment of the present invention, be not intended to limit the invention, it is clear that those skilled in the art can
To carry out various changes, modification without departing from the spirit and scope of the present invention to the present invention.If these modifications to the present invention
Within the scope of belonging to the claims in the present invention and its equivalent technologies with modification, all belong to the scope of protection of the present invention.
Claims (10)
1. a kind of composite power water-cooling device, which is characterized in that including dynamic power system unit and handpiece Water Chilling Units；The heat power
Generating set includes engine and generator；The handpiece Water Chilling Units include motor, compressor and are connected with compressor suction duct
Evaporator and the condenser that is connected with compressor exhaust pipe, for chilled water；It is fixed that the generator and motor include
Son, rotor and bearing, wherein stator include stator core and stator winding；Wherein generator, engine, motor and compressor
It is directly connected in series successively；
The both ends of the engine and motor are respectively provided with outwardly directed transmission shaft；Wherein engine driveshaft one end and power generation
Machine is driven axis connection, and the engine driveshaft other end is connected by coupling device with the transmission shaft of motor, and the biography of motor
The moving axis other end is connected with compressor.
2. composite power water-cooling device according to claim 1, which is characterized in that when the generator or motor stator
When son, rotor and transmission shaft are in horizontally disposed, included in the stator winding above the generator or motor rotor
One or more antigravity Exciting Windings for Transverse Differential Protection；Or above generator and motor rotor simultaneously comprising one or more antigravity around
Group；When the antigravity Exciting Windings for Transverse Differential Protection is passed through electric current, upward bob-weight can be generated to the iron core in generator or motor rotor
The electromagnetic attraction of force direction, the electromagnetic attraction can allow generator or motor shaft horizontally-supported bearing or together with engine
With suffered by the horizontally-supported bearing of compressor transmission shaft pressure straight down reduce or be zero.
3. composite power water-cooling device according to claim 1, which is characterized in that coupling device is shaft joint or clutch
Device.
4. composite power water-cooling device according to claim 1, which is characterized in that be additionally provided with use on the coupling device
In rotating speed or turn to the speed change gear converted.
5. composite power water-cooling device according to claim 1, which is characterized in that further include electric-control system, electric-control system
Including engine control module, alternator control modules, motor control module and cooling-water machine control module；
（1）Engine control module is used to control the operation of engine；
（2）Alternator control modules include at least one of generator module and generator antigravity control module；
The generator module is connected with engine block and generator, for controlling the excitation of generator, and passes through engine
Module controls the rotating speed of engine, to external out-put supply；；
The generator antigravity control module output terminal is connected with the lead of generator antigravity Exciting Windings for Transverse Differential Protection, input terminal connection
External power supply, including Energizing unit and switch unit；Wherein switch unit control antigravity Exciting Windings for Transverse Differential Protection and other stator winding
Connection with separating；Energizing unit is used to that external power supply to be controlled to provide power supply for the antigravity Exciting Windings for Transverse Differential Protection of generator unit stator, this
When generator operation in antigravity bearing pattern；When alternator control modules need generator operation, pass through generator bob-weight
Switch unit in power control module cuts off antigravity Exciting Windings for Transverse Differential Protection or antigravity Exciting Windings for Transverse Differential Protection is restored to determining for generator
In sub- winding；
（3）Motor control module includes at least one of motor module and motor antigravity control module；
The motor module is motor for controlling external power supply；
The motor antigravity control module output terminal is connected with the lead of motor antigravity Exciting Windings for Transverse Differential Protection, input terminal connection
External power supply, including Energizing unit and switch unit；Wherein switch unit control antigravity Exciting Windings for Transverse Differential Protection and other stator winding
Connection with separating；Energizing unit is used to that external power supply to be controlled to provide power supply for the antigravity Exciting Windings for Transverse Differential Protection of motor stator, this
When electric motor operation in antigravity bearing pattern；When motor control module needs electric motor operation, pass through motor bob-weight
Switch unit in power control module cuts off antigravity Exciting Windings for Transverse Differential Protection or antigravity Exciting Windings for Transverse Differential Protection is restored to determining for motor
In sub- winding；
（4）Cooling-water machine control module is used to control the operation of cooling-water machine；
（5）When coupling device uses electric control clutch, electric-control system further includes to control clutch connection and separated biography
Dynamic control module；
Interrelated control can be carried out between modules in electric-control system.
6. composite power water-cooling device according to claim 2, which is characterized in that antigravity Exciting Windings for Transverse Differential Protection for generator or
Independently arranged winding in motor stator.
7. composite power water-cooling device according to claim 1, which is characterized in that further include absorption installation；It is absorption
Unit is connected with waste pipe or cooling water pipe；More than the flue gas and cooling water that absorption installation is discharged by engine
Heat is freezed.
8. composite power water-cooling device according to claim 1, which is characterized in that also set between engine and generator
There is coupling device.
9. a kind of composite power water-cooling device control method, which is characterized in that compound using claim 1-8 any one of them
Power water-cooling device；Control multi-mode cold water is operated in following any operative pattern：
（1）Compressor is operated alone in pattern 1, engine；
The coupling device of engine and motor is connected, generator and external circuit are disconnected, optionally by generator and power generation
Machine antigravity control module is connected；Motor and external circuit are disconnected, optionally control motor and motor antigravity
Module is connected, the optional coupling device for disconnecting generator and engine；Engine is run, the transmission shaft of engine synchronously drives
Generator amature, motor rotor and compressor, engine and motor rotor are in passive idling conditions；
（2）Compressor is operated alone in pattern 2, electric power
The coupling device of engine and motor is disconnected, engine does not work；Motor source in motor access electric-control system
Module passes through motor driven compressor；
（3）Pattern 3, engine combine driving compressor with electric power
The coupling device of engine and motor is connected, generator and external circuit are disconnected, optionally by generator and power generation
Machine antigravity control module is connected, the optional coupling device for disconnecting generator and engine；Run engine, motor access
Motor module, and connected with external power supply, engine combines driving compressor with motor；Generator amature is in passive empty
Turn state；
（4）Pattern 4, engine driving compressor simultaneously drive electrical power generators
Connect the coupling device of engine and motor；Motor and external circuit are disconnected, optionally by motor with it is electronic
Machine antigravity control module is connected；Engine is run, it is synchronous to drive engine and motor rotor and compressor；Generator accesses
Electricity generation module conveys electric energy to external power load；Motor rotor is in passive idling conditions；
（5）Operation absorption installation is applied alone in pattern 5
Engine, generator, motor, Compressor Group, do not work, single to absorption installation input combustion gas, fuel or steaming
Vapour, allows absorption installation operation to freeze, and cold water or hot water are provided to outside；
（6）Pattern 6, single-shot electricity output
The coupling device of generator and motor is disconnected, motor does not work, generator access electricity generation module；Run engine,
Generator is driven, by electricity generation module, electric energy is conveyed to external power load.
10. multi-mode cold water control method according to claim 9, which is characterized in that further include UTILIZATION OF VESIDUAL HEAT IN pattern；
In pattern 1,3,4,6, increase absorption installation in multi-mode cold water；The flue gas and cooling water supply of engine discharge are absorption
Unit can give external offer cold water.
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| CN201711415461.5A CN108119972A (en) | 2017-12-25 | 2017-12-25 | A kind of composite power water-cooling device and composite power water-cooling device control method |
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| CN201711415461.5A CN108119972A (en) | 2017-12-25 | 2017-12-25 | A kind of composite power water-cooling device and composite power water-cooling device control method |
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| CN1133940A (en) * | 1996-02-16 | 1996-10-23 | 端木雨田 | Integrated power arrangement |
| CN2854454Y (en) * | 2005-12-06 | 2007-01-03 | 东南大学 | Mixed power gas heat pump air conditioner |
| CN101135512A (en) * | 2006-08-28 | 2008-03-05 | 三洋电机株式会社 | Air-conditioning and electric power generating system and control method for the same |
| CN107222131A (en) * | 2017-06-27 | 2017-09-29 | 江苏大学 | A kind of rotor gravity unloading type magnetic bearing compound machine |
| CN107421162A (en) * | 2017-04-25 | 2017-12-01 | 东南大学 | A kind of double heat pumps and control method of hybrid power driving UTILIZATION OF VESIDUAL HEAT IN |
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2017
- 2017-12-25 CN CN201711415461.5A patent/CN108119972A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133940A (en) * | 1996-02-16 | 1996-10-23 | 端木雨田 | Integrated power arrangement |
| CN2854454Y (en) * | 2005-12-06 | 2007-01-03 | 东南大学 | Mixed power gas heat pump air conditioner |
| CN101135512A (en) * | 2006-08-28 | 2008-03-05 | 三洋电机株式会社 | Air-conditioning and electric power generating system and control method for the same |
| CN107421162A (en) * | 2017-04-25 | 2017-12-01 | 东南大学 | A kind of double heat pumps and control method of hybrid power driving UTILIZATION OF VESIDUAL HEAT IN |
| CN107222131A (en) * | 2017-06-27 | 2017-09-29 | 江苏大学 | A kind of rotor gravity unloading type magnetic bearing compound machine |
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