CN104242758B - Power generator - Google Patents
Power generator Download PDFInfo
- Publication number
- CN104242758B CN104242758B CN201410248543.5A CN201410248543A CN104242758B CN 104242758 B CN104242758 B CN 104242758B CN 201410248543 A CN201410248543 A CN 201410248543A CN 104242758 B CN104242758 B CN 104242758B
- Authority
- CN
- China
- Prior art keywords
- generator
- output
- detecting part
- working media
- evaporator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Landscapes
- Control Of Eletrric Generators (AREA)
- Control Of Turbines (AREA)
Abstract
The present invention relates to a kind of power generator.The present invention promptly inhibits the excessive rising of the rotation number of generator, and prevents the output of power generator from excessively increasing.Power generator of the invention has evaporator (10), expanding machine (12), generator (14), condenser (16), it pumps (18), the control unit (40) of the frequency changer (30) and control frequency changer (30) that are connect with generator (14), frequency changer (30) has converter portion (32) and inverter (34), control unit (40) has the output detecting part (42) of sensing output and generates the signal generation portion (44) of indication signal, wherein, the indication signal indicates the switching of the conduction and cut-off of the switch portion of converter portion (32), signal generation portion (44) reduces the frequency of the indication signal when the detected value for exporting detecting part (42) becomes specified value or more.
Description
Technical field
The present invention relates to a kind of power generator.
Background technique
In the past, it is known to the discharge heat of various equipment of the recycling from factory etc., the discharge heat using the recycling
Binary power generator of the energy from low-boiling working media export power.For example, in patent document 1, disclosing a kind of hair
Electric installation, the power generator have: the evaporator for evaporating liquid working media；Flow into the gas shape flowed out from evaporator
Working media expanding machine；The generator being connect with expanding machine；The condenser for condensing the working media flowed out from expanding machine；
And the liquid working media flowed out from condenser is pressurizeed and is passed out to the pump of evaporator.
In such binary power generator, using the discharge heat of factory etc., make adding for working media evaporation sometimes
The temperature of thermal medium can rise from stable temperature.When the temperature of heat medium rises, heat medium passes through in evaporator
Heat exchange with working media and the heat for being supplied to the working media can increase.In this way, the hair of the working media in evaporator
Heat just will increase, and rotation number, that is, generator rotation number (power generated in generator) of expanding machine will increase.Work as hair
When the rotation number of motor excessively increases, the reduction due to the durability of the increased generator of the calorific value in generator is enabled
People's worry.
It to be more than preset specified value in the output of generator in patent document 1 in order to avoid such problems
In the case where, by reducing the rotation number of pump, so that the internal circulating load of working media be made to reduce.When the rotation number of pump reduces,
The influx of the working media of evaporator can be reduced.In this way, the amount of the gasiform working media flowed out from evaporator can subtract
Few, rotation number, that is, generator rotation number of expanding machine can reduce as a result,.In patent document 1, inhibit generator like this
The reduction of durability.
Existing technical literature
Patent document
Patent document 1: special open 2008-312330 bulletin.
Summary of the invention
Subject to be solved by the invention
In above patent document 1, in the case where the output of generator will be more than specified value, the rotation number for making pump is carried out
Reduced control.But in this control, until the evaporation capacity of the working media in evaporator since reducing the rotation number of pump
The time is needed until reduction, in turn, until expanding machine and generator since being reduced the evaporation capacity of the working media in evaporator
Rotation number reduce until be also required to the time.Like this, in the rotation number from reducing the rotation number of pump until generator
During until reduction, the deviation of meeting generation time, therefore, the output of generator can exceedingly increase during this period.
It is an object of the present invention to promptly inhibit the excessive rising of the rotation number of generator.
Solution for solving the problem
To solve the above technical problems, the present invention provides a kind of power generator, which is characterized in that has: evaporating working media
Evaporator；Flow into the expanding machine of the working media flowed out from the evaporator；The generator being connect with the expanding machine；Make from
The condenser of the working media condensation of the expanding machine outflow；It is pressurizeed and is sent to the working media flowed out from the condenser
The pump of the evaporator is arrived out；The frequency changer being connect with the generator；And the control of the control frequency changer
Portion, the frequency changer have: connecting with the generator, be the change of direct current by the exchange conversion generated in the generator
Parallel operation portion；And connect with the converter portion, it is the inverter of exchange by DC converting, the control unit has: directly
Or the output detecting part of the output of the generator is sensed indirectly；And generate the signal generation portion of indication signal, wherein should
Indication signal indicates conducting (ON)/cut-off (OFF) switching of the switch portion in the converter portion, and the signal generation portion is in institute
Stating the detected value of output detecting part reduces the frequency of the indication signal when becoming specified value or more.
The frequency of indication signal is reduced when according to the present invention, by becoming specified value or more in the detected value for exporting detecting part
Rate, so that the rotation number of generator reduces.That is, in the present invention, when the detected value for exporting detecting part becomes specified value or more
Therefore the control for carrying out the rotation number for reducing generator via converter portion can promptly inhibit the mistake of the rotation number of generator
The rising of degree.As a result, can prevent the output of power generator from exceedingly increasing.
In this case, the output detecting part can also sense the output from the inverter.
In this state, it can be carried out the control based on the output from inverter, that is, can be carried out based on correctly output
Control.
Alternatively, the output detecting part can also sense the output from the converter portion.
In this state, it can be carried out the control based on the output from converter portion, that is, can be carried out based on direct current and noise
The control of few stable output.
Alternatively, the output detecting part can also sense the output from the generator.
In this state, it carries out based on the control directly exported for carrying out self generator, therefore, can more quickly inhibit to send out
The excessive rising of the rotation number of motor.
Invention effect
As described above, according to the present invention, can promptly inhibit the excessive rising of the rotation number of generator.
Detailed description of the invention
Fig. 1 is the figure for showing the outline structure of power generator of an embodiment of the invention.
Fig. 2 is the figure for showing the outline structure of the variation of control unit of above embodiment.
Fig. 3 is the figure for showing the outline structure of the variation of control unit of above embodiment.
Fig. 4 is the figure for showing the outline structure of the comparative example of power generator of above embodiment.
Fig. 5 is the figure for showing the outline structure of the comparative example of power generator of above embodiment.
Specific embodiment
On one side referring to Fig.1, the power generator of first embodiment of the invention is illustrated on one side.
As shown in Figure 1, the power generator has: evaporator 10；The gasiform work flowed out from evaporator 10 is flowed into be situated between
The expanding machine 12 of matter；The generator 14 being connect with expanding machine 12；The condenser for condensing the working media flowed out from expanding machine 12
16；The pump 18 to pressurize to the liquid working media flowed out from condenser 16；Connection evaporation in a series arrangement in order
Device 10, expanding machine 12, condenser 16 and the circulation stream 20 for pumping 18；The frequency changer 30 being connect with generator 14；And
Carry out the control unit 40 of various controls.
Evaporator 10 makes liquid working media evaporate and become gasiform working media.Specifically, being flowed into
The liquid working media of evaporator 10 by be externally supplied to the evaporator 10 heat medium carry out heat exchange and
Evaporation.As the heat medium for being supplied to evaporator 10, for example, the hot water or high-temperature gas from discharges such as factories can be enumerated.
The downstream side of the evaporator 10 in circulation stream 20 is arranged in expanding machine 12.In the present embodiment, as expansion
Machine 12 carries out turning for rotation driving using the expansion energy having using the gasiform working media being discharged from evaporator 10
The spiral expansion machine of the positive displacement of son.Specifically, the expanding machine 12 includes the internal shell for being formed with rotor chamber；And with
The mode rotated freely is supported on indoor male and female a pair of the screw rotor (screw rotor) of rotation.In expanding machine 12, by from
The expansion energy for the working media that the air entry for being formed in the shell is supplied to the rotor chamber carries out the screw rotor
Rotation driving.Moreover, because being expanded in the rotor chamber and the working media of pressure reduction is from the row for being formed in the shell
Outlet is discharged to circulation stream 20.In addition, be not limited to the spiral expansion machine of positive displacement as expanding machine 12, also can be used from
Expanding machine or Worm type expanding machine of core type etc..
Generator 14 is connect with expanding machine 12.In the present embodiment, as generator 14, use can adjust rotation number
IPM generator (permanent magnet synchronous generator).Specifically, generator 14 have in a pair of of screw rotor of expanding machine 12
A side connection rotary shaft.In generator 14, rotary shaft is rotated along with the rotation of the screw rotor, is thus generated
Power.The rotation number of generator 14 can be controlled by control unit 40 via frequency changer 30.In addition, generator 14 is not limited to
IPM generator is also possible to the other types of synchronous generator such as electromagnet synchronous generator.
The downstream side of the expanding machine 12 in circulation stream 20 is arranged in condenser 16.Condenser 16 makes to be discharged from expanding machine 12
Gasiform working media condensation and become liquid working media.Specifically, being flowed into the gas shape of condenser 16
Working media by be externally supplied to the condenser 16 cooling medium carry out heat exchange and condensed.As supply
To the cooling medium of condenser 16, for example, cooling water or air can be enumerated.
The downstream side of the condenser 16 in circulation stream 20 is arranged in pump 18 (between evaporator 10 and condenser 16).Pump 18
The liquid working media condensed in condenser 16 is forced into defined pressure, passes out to the pump 18 in circulation stream 20
Downstream side.As pump 18, the centrifugal pump or rotor for having impeller (impeller) used as rotor are by a pair of of gear structure
At gear pump (gear pump) etc..The pump 18 can be driven with arbitrary rotation number.
Frequency changer 30 has converter portion 32 and inverter 34.Converter portion 32 is connect with generator 14, will be from
The exchange conversion that generator 14 exports is direct current.Inverter 34 is connect with converter portion 32, by what is exported from converter portion 32
DC converting is exchange (typically, it is commercial power of 50Hz or 60Hz).Converter portion 32 has adjustment generator 14
The switch portion 32a of output.About switch portion 32a, semiconductor switch is used.
Control unit 40 has output detecting part 42 and signal generation portion 44.It exports the sensing of detecting part 42 and comes from inverter 34
Output (in the present embodiment, being alternating voltage).Signal generation portion 44 generates indication signal, indication signal instruction switch
The switching of the conduction and cut-off of portion 32a.In control unit 42, based on the output from inverter 34, make the frequency of indication signal
Variation.
In power generator, due to the rising etc. of the temperature for the heat medium for being supplied to evaporator 10, expanding machine sometimes
12 rotation number and the rotation number of generator 14 can exceedingly rise.In signal generation portion 44, in the inspection of output detecting part 42
When measured value becomes specified value or more, the frequency of indication signal is reduced.The rotation number that can inhibit generator 14 as a result, can inhibit
The power generated in generator 14.As a result, the voltage of the direct current in converter portion 32 reduces, can inhibit to come from inverter
34 output.
As described above, in this power generator, become specified value or more in the detected value of output detecting part 42
When reduce be sent to converter portion 32 indication signal frequency.The mistake of the rotation number of generator 14 can promptly be inhibited as a result,
The rising of degree.In the present embodiment, output detecting part 42 senses the output from inverter 34 and therefore can be based on
The control correctly exported.In addition, in output detecting part 42, other than the voltage of exchange, also available electric current or function
Rate is as detected value.It is also same in situation shown in Fig. 3 below.
Although here, showing the knot that output detecting part 42 senses the output of inverter 34 in the above-described embodiment
Structure, but it is also possible to which as shown in Fig. 2, output detecting part 42 senses the output in converter portion 32.In this way, just can be carried out based on change
The control of the output in parallel operation portion 32, that is, can be carried out the control based on direct current and the few stable output of noise.In addition, can be carried out
It is controlled faster than the output based on inverter 34.In this case, about the specified value, the voltage of direct current, electricity are used
Stream or power.
Exporting detecting part 42 can also be as shown in figure 3, directly senses the output of generator 14.In this way, can be in rank earlier
Duan Jinhang control, therefore, can more quickly inhibit the rising of the rotation number of generator 14.
(the first comparative example)
Fig. 4 is the outline structure for showing the first comparative example of power generator of above embodiment.In addition, comparing first
In example, only part different from the embodiment described above is illustrated, is omitted to construction identical with above embodiment, effect
And the explanation of effect.
The control unit 40 of the power generator of first comparative example has output detecting part 42 and pump control unit 46.Pump control unit 46
When the detected value for exporting detecting part 42 becomes specified value or more, reduce the rotation number of pump 18 via inverter 47.Work as pump
When 18 rotation number reduces, the amount for being flowed into the liquid working media of evaporator 10 can be reduced, therefore, from the evaporator 10
The amount of the gasiform working media of outflow is reduced.As a result, the rotation number of expanding machine 12 is reduced, that is, the rotation of generator 14
Revolution (generated output in generator 14) is reduced.
But in first comparative example, in the rotation number drop since reducing the rotation number of pump 18 until generator 14
During until low, the deviation of meeting generation time.It is therefore preferable that control unit 40 directly controls hair as above embodiment
The rotation number of motor 14.
(the second comparative example)
Fig. 5 shows the outline structure of the second comparative example of the power generator of above embodiment.In addition, in the second comparative example
In, also only part different from the embodiment described above is illustrated, is omitted to construction identical with above embodiment, effect
And the explanation of effect.
The power generator of second comparative example is also equipped with the bypass flow path 22 bypassed to expanding machine 12 and is bypassing with setting
The bypass valve 24 of flow path 22.
Control unit 40 has output detecting part 42 and valve control unit 48.Detected value of the valve control unit 48 in output detecting part 42
Bypass valve 24 is opened when as more than specified value.When bypass valve 24 is opened, from the gasiform work of the outflow of evaporator 10
Therefore a part of medium directed toward condenser 16 in the case where not via expanding machine 12 is flowed into the gas shape of expanding machine 12
Working media amount reduce.As a result, the rotation number of expanding machine 12 is reduced, that is, the rotation number (generator 14 of generator 14
In generated output) reduce.
But in second comparative example, need to bypass flow path 22 and bypass valve 24, device is integrally complicated.Cause
This, preferably as above embodiment, without using bypass flow path 22 and bypass valve 24, control unit 40 is directly controlled
The rotation number of generator 14 processed.
Description of symbols
10: evaporator；
12: expanding machine；
14: generator；
16: condenser；
18: pump；
20: circulation stream；
22: bypass flow path；
24: bypass valve；
30: frequency conversion part；
32: converter portion；
32a: switch portion；
34: inverter；
40: control unit；
42: output detecting part；
44: signal generation portion.
Claims (4)
1. a kind of power generator, which is characterized in that have:
Evaporator evaporates working media；
Expanding machine flows into the working media flowed out from the evaporator；
Synchronous generator is connect with the expanding machine；
Condenser makes the working media condensation flowed out from the expanding machine；
Pump, pressurizes to the working media flowed out from the condenser and passes out to the evaporator；
Frequency changer is connect with the synchronous generator；And
Control unit controls the frequency changer,
The frequency changer has:
Converter portion is connect with the synchronous generator, is direct current by the exchange conversion generated in the synchronous generator, and
And adjust the revolving speed of the synchronous generator；And
Inverter is connect with the converter portion, is exchange by DC converting,
The control unit has:
Detecting part is exported, the output of the synchronous generator is directly or indirectly sensed；And
Signal generation portion, generates indication signal, which indicates cutting for the conduction and cut-off of the switch portion in the converter portion
It changes,
The signal generation portion reduces the indication signal when the detected value of the output detecting part becomes specified value or more
Frequency, the revolving speed of the synchronous generator is quickly restrained as a result,.
2. power generator according to claim 1, wherein
The output detecting part senses the output from the inverter.
3. power generator according to claim 1, wherein
The output detecting part senses the output from the converter portion.
4. power generator according to claim 1, wherein
The output detecting part senses the output from the synchronous generator.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-120732 | 2013-06-07 | ||
| JP2013120732A JP2014239604A (en) | 2013-06-07 | 2013-06-07 | Generating set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104242758A CN104242758A (en) | 2014-12-24 |
| CN104242758B true CN104242758B (en) | 2019-07-16 |
Family
ID=52136280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410248543.5A Active CN104242758B (en) | 2013-06-07 | 2014-06-06 | Power generator |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2014239604A (en) |
| KR (1) | KR101603013B1 (en) |
| CN (1) | CN104242758B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008312330A (en) * | 2007-06-13 | 2008-12-25 | Ebara Corp | Waste heat power generating apparatus and operation method for the waste heat power generating apparatus |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4839700B2 (en) * | 2005-07-04 | 2011-12-21 | パナソニック株式会社 | Generator control device and refrigeration cycle device |
| EP1775430A1 (en) * | 2005-10-17 | 2007-04-18 | Siemens Aktiengesellschaft | Steam power plant and method for retrofitting a steam power plant |
| JP4908290B2 (en) * | 2007-03-30 | 2012-04-04 | 株式会社神戸製鋼所 | Power generator |
| JP2009097434A (en) * | 2007-10-17 | 2009-05-07 | Sanden Corp | Waste heat utilization device for internal combustion engine |
| CN101951216B (en) * | 2010-08-27 | 2012-05-16 | 上海交通大学 | Regulating method of reverse-running electricity generation of water pump of pump station |
| CN102810875B (en) * | 2011-05-30 | 2014-10-22 | 通用电气公司 | System using converter for energy conversion and operating method of system |
| CN102769304A (en) * | 2012-07-12 | 2012-11-07 | 华北电力大学 | Boiler smoke waste heat power generation system |
-
2013
- 2013-06-07 JP JP2013120732A patent/JP2014239604A/en active Pending
-
2014
- 2014-06-02 KR KR1020140066962A patent/KR101603013B1/en active IP Right Grant
- 2014-06-06 CN CN201410248543.5A patent/CN104242758B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008312330A (en) * | 2007-06-13 | 2008-12-25 | Ebara Corp | Waste heat power generating apparatus and operation method for the waste heat power generating apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014239604A (en) | 2014-12-18 |
| KR101603013B1 (en) | 2016-03-11 |
| CN104242758A (en) | 2014-12-24 |
| KR20140143704A (en) | 2014-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106593554B (en) | Rankine cycle power generation device | |
| JP4889956B2 (en) | Power generator | |
| JP6533950B2 (en) | Motor drive device, compressor drive device using the same, refrigeration apparatus and refrigerator | |
| EP2940254B1 (en) | Power generation system and power generation method | |
| JP2014238041A (en) | Waste heat recovery device and waste heat recovery device operation control method | |
| JP4684762B2 (en) | Power generator | |
| US9670799B2 (en) | Power generation apparatus including predetermined slip-based time delay control for grid connection | |
| JP2016164378A (en) | Power generation device | |
| JP6406583B2 (en) | Rankine cycle equipment | |
| JP2009188159A (en) | Power converter | |
| CN104242758B (en) | Power generator | |
| JP2017208979A (en) | Power supply unit | |
| DK2766579T3 (en) | ORGANIC RANKINE PROCESS HEAT POWER ENGINE | |
| JPH0445739B2 (en) | ||
| JP2008275209A (en) | Refrigerating cycle device using expander | |
| JP2020537476A (en) | Systems and methods for dual power variable speed drives | |
| JP2015034497A (en) | Rankine cycle device | |
| RU2757147C1 (en) | Power unit with machine power conversion | |
| WO2023244671A1 (en) | Systems and methods for controlling operation of a chiller | |
| JP5539472B2 (en) | Circulation pump operation method and operation system in thermal power plant | |
| JP2022155391A (en) | Rankine cycle device, power generation system and stop method | |
| JP2014214912A (en) | Refrigeration cycle device | |
| JP2012057556A (en) | Abnormality detection device for circulation flow path including electric pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |