CN106907201A - A kind of unattended formula organic Rankine bottoming cycle isolated network power generation monitoring system and method - Google Patents
A kind of unattended formula organic Rankine bottoming cycle isolated network power generation monitoring system and method Download PDFInfo
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- CN106907201A CN106907201A CN201611225360.7A CN201611225360A CN106907201A CN 106907201 A CN106907201 A CN 106907201A CN 201611225360 A CN201611225360 A CN 201611225360A CN 106907201 A CN106907201 A CN 106907201A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
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Abstract
The invention belongs to the energy and power technology field, more particularly to a kind of unattended formula organic Rankine bottoming cycle isolated network power generation monitoring system and method.For the failure that the Automated condtrol and automated processing system of realizing organic Rankine bottoming cycle isolated network power generation monitoring system occur, the present invention proposes a kind of unattended formula organic Rankine bottoming cycle isolated network power generation monitoring system and method, including flowmeter, pressure sensor, temperature sensor, working medium pump, evaporator, electric T-shaped valve, expanding machine, generator, condenser, heat source loop, cooling circuit, touch-screen, PLC control unit, working medium pump frequency converter, relay, alarm and multi-functional electrodymamometer.Real-time state monitoring is carried out by unit, under unstable thermal source and low-temperature receiver fluctuation, the stability of afterheat generating system, reliability and Effec-tive Function is realized.The present invention has good adaptivity while can be automatically adjusted in the system failure, realizes the unattended of isolated network electricity generation system.
Description
Technical field
The invention belongs to the energy and power technology field, more particularly to a kind of unattended formula organic Rankine bottoming cycle isolated network hair
Electricity consumption monitoring system and method.
Background technology
Organic Rankine bottoming cycle (ORC) is low temperature heat energy during one kind can be utilized effectively (such as waste heat, solar energy, geothermal energy etc.)
Technology.Traditional steam Rankine cycle, with water as working medium, the boiling point of water is high, if using low temperature exhaust heat, due to steam specific volume
Greatly, it is not easy to reach and keep superheat state so that cycle efficieny is very low, in addition can not complete circulation.Organic Rankine bottoming cycle is adopted
Lower boiling organic working medium is used, due to organic working medium low boiling point, it is easy to overheat, high steam is easily produced, it is organic bright in addition
Agree recycle unit simple, be easy to integrated and movement, so have big advantage for reclaiming less than 300 DEG C of low temperature exhaust heat, no
Only can be used to generate electricity, can also be used to drive the compressor of refrigeration system and the high pressure of driving reverse osmosis seawater desalination system
Pump.Organic Rankine bottoming cycle technology has significant advantage and wide application prospect in low temperature hot merit transfer process, and it is studied
Key and focus of the middle low-temperature energy sources using technology are turned into.It is that industrial and mining enterprises carry out energy-conservation that organic Rankine bottoming cycle (ORC) generates electricity
Emission reduction, the effective measures of consumption reduction synergy, are also the only way which must be passed for realizing recycling economy.Organic Rankine cycle power generation system is mainly wrapped
Include working medium pump, evaporator, expanding machine, condenser, grease pump, expanding machine and heat source loop, cooling circuit.Basic heating power mistake
Journey is that steam enters expansion machinery expansion work, so as to drive generator or drag the rotation of other dynamic power machines.From expansion machinery
The steam of discharge condenses into liquid within the condenser to cooling water heat release, is finally pumped back to evaporator again by working medium pump, such as
This is constantly circulated down.ORC low-temperature electricity-generatings have many similar places to thermal power plant system.It is the same with thermal power plant, with length
The operation of time, all parts in system may break down, and cause system effectiveness decline, penalty, cause huge
Economic loss, or even seriously threaten personal safety.Therefore, ORC status of processes Monitoring and control system is set up to ensure system
It is safe and stable, effective operation increasingly paid attention to.The report that relevant ORC controls generate electricity at present is more common in theory, and one
The ORC isolated network generator experimental units that a little laboratories are built are generally manually operated experiment, and Automated condtrol is not realized really.Therefore
ORC is intended to realize commercialization, it is necessary to realizes Automated condtrol, and carries out real-time monitoring to each state parameter, when equipment and certainly
When dynamic regulating system breaks down, system can take measures to protect production equipment not to be damaged automatically.
The content of the invention
Regarding to the issue above, the present invention proposes a kind of unattended formula organic Rankine bottoming cycle isolated network power generation monitoring system and side
Method, a kind of unattended formula organic Rankine bottoming cycle isolated network power generation monitoring system, including organic Rankine cycle power generation system and ORC are supervised
Control system is surveyed, the organic Rankine cycle power generation system includes flowmeter 4, pressure sensor 5, temperature sensor 6, working medium pump
10th, evaporator 11, electric T-shaped valve 12, expanding machine 13, generator 14, condenser 15, heat source loop 16, cooling circuit 17, institute
Stating monitoring control system includes touch-screen 1, PLC control unit 2, working medium pump frequency converter 3, relay 7, alarm 8, multi-functional electricity
Power meter 9；The working medium pump 10, evaporator 11, electric T-shaped valve 12, expanding machine 13, condenser 15 join end to end successively, described
Entrance of another way outlet of electric T-shaped valve 12 directly with the condenser 15 is connected, and the expanding machine 13 is same with generator 14
Axle is connected, and the flowmeter 4 is arranged on the outlet of working medium pump 10, and four groups of pressure sensors 5 and temperature sensor 6 are separately mounted to
Working medium pump 10 is exported, evaporator 11 is exported, expanding machine 13 is exported and the export pipeline of condenser 15 on, touch-screen 1 and PLC are controlled
Connected by electric wire between unit processed 2, relay 7, alarm 8, multifunction power meter 9, working medium pump frequency converter 3 are controlled with PLC
Connected by electric wire between unit 2, working medium pump frequency converter 3 is connected with the motor of working medium pump 10 by electric wire, heat source loop 16 and
Cooling circuit 17 is linked to be closed-loop path with PLC control unit 2 respectively by wire.
The ORC monitor control systems include two kinds of operational modes of manual mode and automatic mode, and both of which can touched
Touch and switched on the homepage panel of screen.
The manual mode that the ORC monitor control systems include, manually adjusts the frequency converter frequency and work of working medium pump
The stroke of matter pump carrys out the power output and rotating speed of regulator generator；The automatic mode that the ORC monitor control systems include is used for
Set steady generates electricity, and in the case where thermal source and low-temperature receiver fluctuate, work is adjusted by the feedback of multifunction power meter output frequency
The frequency of matter pump frequency conversion device.
A kind of method of work of unattended formula organic Rankine bottoming cycle isolated network power generation monitoring system is as follows：
Step A：The system Cooling and Heat Source parameter of setting is regulated, is powered to unit, the automatic of touch-screen 1 is first according to
Required power carries out manual mode regulation, by working medium pump regulation to specified stroke；
Step B：The automatic of working medium pump frequency converter 3；
Step C：When the feedback of evaporator outlet degree of superheat analog signal is more than setting value, electric T-shaped valve 12 is cut automatically
To the side of expanding machine 13, while grease pump starts, lubricating oil is lubricated to expanding machine 13, and expanding machine 13 is rotated and drives generator
14 are powered；
Step D：Feedback according to the three-phase rate-adaptive pacemaker of multi-functional electrodymamometer 9 adjusts the frequency of working medium pump frequency converter 3, makes
The rotating speed of generator 14 reaches declared working condition；
Step E：When the rotating speed of generator 14 fluctuates in 3000 ± 200RPM scopes, the excitation AVR of generator 14 starts work
Make, make output three-phase voltage stabilization in 400 ± 5V；
Step F：When the load increases, the three-phase frequency of generator 14 reduction, automatic control system starts, and regulation working medium pump becomes
The frequency of frequency device 3, makes the rotating speed of generator 14 reach declared working condition；
Step G：When load reduces or is breaking suddenly, the stall of expanding machine 13, the automatic tangential bypass of electric T-shaped valve 12
Side, grease pump is closed；
Step H：At the end of run time, the automatic tangential bypass side of electric T-shaped valve 12, grease pump is closed, working medium pump 10
Automatic low discharge operation, after after unit cooling, closes working medium pump 10, and unit is powered off.
The system includes following alarm amount and corresponding processing scheme：
A, expanding machine stall, i.e. synchronous excitation generator three-phase electricity frequency are more than 58HZ；
Processing scheme：Electric T-shaped valve tangentially bypasses side automatically, and grease pump is closed, and buzzer warning is opened；
B, the operation of working medium pump frequency converter are abnormal, automatically control failure；
Processing scheme：Electric T-shaped valve tangentially bypasses side automatically, and grease pump is closed, and working medium pump Frequency Converter Control stops；
C, the alarm of synchronous excitation generator phase shortage, when UVW three-phases monophase current is 0, phase shortage alarm starts；
Processing scheme：Electric T-shaped valve tangentially bypasses side automatically, and grease pump is closed, and buzzer warning is opened, and shuts down inspection
Look into；
When d, the expander inlet degree of superheat are not enough, there is hygral expansion in expanding machine；
Processing scheme：Ejection warning window, buzzer warning is opened, and manually heightens heat source temperature or flow；
E, cooling go wrong, and high pressure, condensing pressure superpressure occurs in unit；
Processing scheme：Ejection warning window, 0.8Mpa safety valves are upspring pressure release automatically on fluid reservoir；
F, expanding machine stop operating suddenly；
Processing scheme：Electric T-shaped valve tangentially bypasses side automatically, and grease pump is closed, while PLC control unit control work
Matter pump frequency conversion device reduces frequency, so that reduce working medium flow, control system interface ejection warning window, display alarm reason, honeybee
Ring device alarm is opened；
When g, working medium pump intake degree of supercooling are less than 3 DEG C, i.e., cooling circuit goes wrong；
Processing scheme：Electric T-shaped valve tangentially bypasses side automatically, and grease pump is closed, while PLC control unit control work
Matter pump frequency conversion device reduces frequency, so as to reduce working medium flow, PLC control unit sends instruction to the triple valve of thermal source, by thermal source
Pass-through state into unit switches to bypass condition, control system interface ejection warning window, display alarm reason, buzzer
Alarm is opened.
The organic Rankine bottoming cycle is using R245fa as working medium.
The enthalpy of the R245fa working medium shown by the touch-screen, the degree of superheat, degree of supercooling, evaporating temperature, condensation temperature
Unknown parameter, the pressure signal that the temperature signal for being gathered temperature sensor using PLC control unit is gathered with pressure sensor
As |input paramete, then calculated using fitting formula and automatically obtained, directly carry out logic feedback using these signals, realized certainly
Dynamic control.
The beneficial effects of the present invention are：
1.ORC monitoring systems interface can show important thermal parameter and electrical parameter, can change the feedback of PLC controls
Amount, the important thermal parameters of R245fa of fitting and the basic zero deflection of parameters obtained of actually tabling look-up, are easy to carry out ORC units in real time
Condition monitoring and fault diagnosis.
2. under unstable thermal source and low-temperature receiver fluctuation, automatic control system of the invention has good adaptivity.By
It is low in organic Rankine bottoming cycle generating heat source temperature, start soon compared with thermal power plant, and control program is simple, effective, safe, energy
It is enough to automatically adjust operating condition, and fast response time in given power load, the stability of afterheat generating system can be realized,
Reliability and Effec-tive Function.
3. when ORC equipment and automatic regulating system break down, system can automatically be taken when unattended and arrange
Apply and protect production equipment not to be damaged, the isolated network for being particularly suited for portable integrated unit generates electricity, be commercialized to realizing that ORC generates electricity
Have great importance.
Brief description of the drawings
Accompanying drawing 1 is ORC power generation monitoring system structure charts.
Accompanying drawing 2 is ORC monitor system software interface schematic diagrams.
Reference：1- touch-screens, 2-PLC control units, 3- working medium pumps frequency converter, 4- flowmeters, 5- pressure sensors,
6- temperature sensors, 7- relays, 8- alarms, the multi-functional electrodymamometers of 9-, 10- working medium pumps, 11- evaporators, 12- electronic three
Port valve, 13- expanding machines, 14- generators, 15- condensers.
Specific embodiment
To realize the Automated condtrol of organic Rankine bottoming cycle isolated network power generation monitoring system, automatic regulating system failure, in nothing
Take measures to protect production equipment not to be damaged automatically when people is on duty, the present invention proposes a kind of unattended formula organic Rankine and follows
Ring isolated network power generation monitoring system and method.The present invention is described in detail below in conjunction with the accompanying drawings.
Accompanying drawing 1 is ORC generation monitoring system construction drawings, as shown in figure 1, including organic Rankine cycle power generation system and ORC
Monitor control system, the organic Rankine cycle power generation system includes flowmeter 4, pressure sensor 5, temperature sensor 6, working medium
Pump 10, evaporator 11, electric T-shaped valve 12, expanding machine 13, generator 14, condenser 15, heat source loop 16, cooling circuit 17,
The monitor control system includes touch-screen 1, PLC control unit 2, working medium pump frequency converter 3, relay 7, alarm 8, multi-functional
Electrodymamometer 9；The working medium pump 10, evaporator 11, electric T-shaped valve 12, expanding machine 13, condenser 15 join end to end successively, institute
State entrance of another way outlet of electric T-shaped valve 12 directly with the condenser 15 to be connected, the expanding machine 13 and generator 14
Coaxial to be connected, the flowmeter 4 is arranged on the outlet of working medium pump 10, and the pressure sensor 5 and temperature sensor 6 are arranged on work
Matter pump 10 is exported, evaporator 5 is exported, expanding machine 13 is exported and the export pipeline of condenser 15 on, touch-screen 1 and PLC are controlled
Connected by electric wire between unit 2, relay 7, alarm 8, multifunctional electric meter 9, working medium pump frequency converter 3 are controlled with PLC
Connected by electric wire between unit 2, working medium pump frequency converter 3 is connected with the motor of working medium pump 10 by electric wire, heat source loop 16 and
Cooling circuit 17 is linked to be closed-loop path with PLC control unit 2 respectively by wire.
The monitoring of organic Rankine bottoming cycle power generation monitoring system is with control method：First by the flowmeter 4 on ORC units,
Operational factor flow, pressure, temperature and multi-functional electrodymamometer that pressure sensor 5, temperature sensor 6 are collected respectively
9 generator speeds for being gathered, generator voltage, dynamo current, generated output power are defeated by analog quantity and digital quantity
Enter during circuit delivers to PLC control unit 2；Secondly PLC control unit 2 is sent to various signal messages on touch screen computer 1, from
And thermal parameter and electrical parameter can be shown on touch screen computer.The operation button on touch screen computer 1 again can be right simultaneously
PLC control unit 2 sends control instruction.PLC control unit 2 can control to change the frequency of working medium pump frequency converter 3, and then change
The flow of working medium pump；PLC control unit 2 also control the frequency of grease pump frequency converter, so as to be lubricated in controlling expanding machine 13
The flow of oil.The unlatching of the control relay 7 of PLC control unit 2 and alarm 8 simultaneously.The unlatching of relay 7 determines electronic three
Port valve 12 is in bypass condition or pass-through state.The temperature of low-temperature receiver loop and heat source loop, flow signal are transferred to PLC controls
In unit processed 2, PLC control unit 2 controls the unlatching of chilled(cooling) water return (CWR) and the unlatching of thermal source triple valve.Wherein evaporator is gone out
Feedback quantity of temperature, the expander outlet degree of superheat and the generator speed of making a slip of the tongue as PLC control unit 2.
What is automatically controlled during ORC unit generations comprises the following steps that：
Step A：The system Cooling and Heat Source parameter of setting is regulated, is powered to unit, the automatic of touch-screen 1, into ORC
(organic Rankine bottoming cycle) system controlling software, being first according to required power carries out manual mode regulation, by working medium pump regulation to finger
Determine stroke；
Step B：The automatic start button on ORC monitor system softwares interface is pressed, working medium pump frequency converter 3 is opened automatically
It is dynamic that (frequency converter starts initial value and is set as 20-25HZ, and setting value can be input into tune on the interface of ORC monitor system softwares
It is whole)；
Step C：When the feedback of the outlet superheat degree analog signal of evaporator 11 on ORC monitoring systems interface is more than setting value
When, the automatic tangential side of expanding machine 13 of electric T-shaped valve 12, while grease pump starts, lubricating oil is lubricated to expanding machine 13,
Expanding machine 13 is rotated and drives synchronous excitation generator 14 to be powered；
Step D：According to the feedback of the three-phase rate-adaptive pacemaker of multi-functional electrodymamometer 14, working medium is adjusted in the method that the cycle approaches
The frequency of pump frequency conversion device 3, makes generator speed reach declared working condition.After the frequency of regulation working medium pump frequency converter 3, the change of flow
Change has hysteresis quality, so, when generation frequency is relatively low, automatically in a cycle about 1-2 minute, raise working medium pump frequency converter 3 frequently
Rate 2-3HZ, then progressively progressively increases to setting operating mode.
Step E：When the rotating speed of synchronous excitation generator 14 fluctuates in 3000 ± 200RPM scopes, synchronous excitation generator
Excitation AVR starts working, and makes output three-phase voltage stabilization in 400 ± 5V, and the frequency of alternating current is with the heat source temperature small model of fluctuation
Enclose fluctuation.
Step F：When the load increases, generator three-phase frequency reduction, automatic control system starts, and adjusts working medium pump frequency conversion
The frequency of device 3, makes the rotating speed of generator 14 reach declared working condition；
Step G：When load reduces or is breaking suddenly, the stall of expanding machine 13, the automatic tangential bypass of electric T-shaped valve 12
Side, grease pump is closed；
Step H：At the end of run time, the button that is automatically stopped on ORC monitoring systems interface, electric T-shaped valve 12 are pressed
Automatic tangential bypass side, grease pump is closed, and the operation of the low discharge of working medium pump 10, after after unit cooling, closes working medium pump 10, unit
Power-off.
When being broken down for system, control system also includes following alarm amount and processing scheme：
A, expanding machine stall, i.e. synchronous excitation generator three-phase electricity frequency are more than 58HZ；
Processing scheme：Electric T-shaped valve tangentially bypasses side automatically, and grease pump is closed, and buzzer warning is opened；
B, the operation of working medium pump frequency converter are abnormal, automatically control failure；
Processing scheme：Electric T-shaped valve tangentially bypasses side automatically, and grease pump is closed, and working medium pump Frequency Converter Control stops；
C, the alarm of synchronous excitation generator phase shortage, when UVW three-phases monophase current is 0, phase shortage alarm starts；
Processing scheme：Electric T-shaped valve tangentially bypasses side automatically, and grease pump is closed, and buzzer warning is opened, and shuts down inspection
Look into；
When D, the expander inlet degree of superheat are not enough, there is hygral expansion in expanding machine；
Processing scheme：Ejection warning window, buzzer warning is opened, and manually heightens heat source temperature or flow；
E, cooling go wrong, and high pressure, condensing pressure superpressure occurs in unit；
Processing scheme：Ejection warning window, 0.8Mpa safety valves are upspring pressure release automatically on fluid reservoir；
F, expanding machine stop operating suddenly；
Processing scheme：Electric T-shaped valve tangentially bypasses side automatically, and grease pump is closed, while PLC control unit control work
Matter pump frequency conversion device reduces frequency, so that reduce working medium flow, control system interface ejection warning window, display alarm reason, honeybee
Ring device alarm is opened；
When G, working medium pump intake degree of supercooling are less than 3 DEG C, i.e., cooling circuit goes wrong；
Processing scheme：Electric T-shaped valve tangentially bypasses side automatically, and grease pump is closed, while PLC control unit control work
Matter pump frequency conversion device reduces frequency, so as to reduce working medium flow, PLC control unit sends instruction to the triple valve of thermal source, by thermal source
Pass-through state into unit switches to bypass condition, control system interface ejection warning window, display alarm reason, buzzer
Alarm is opened.
Accompanying drawing 2 is ORC monitor system software interface schematic diagrams, as shown in Fig. 2 ORC monitoring systems interface operation is simple, work(
Can be complete, with system overall picture interface, whole parameter interfaces, operational factor interface, 4, tendency chart interface sub-interface.System is complete
Looks interface is default interface, and important thermal parameter such as pressure, flow, temperature, the degree of superheat can be shown in system flow chart,
Also voltage x current, generator speed and the electrical power of load can be shown, is easy to carry out real-time state monitoring, system to unit
Overall picture interface is also convenient for carrying out unit various important operations, such as unit operation pattern, including manual mode and automatic mode, two
The pattern of kind can be switched on the homepage panel of control touch screen interface.Can be with controlled medium pump, the start and stop of oil pump.System
The information of the warning window of overall picture interface ejection is conducive to rapidly finding out unit warning reason, conveniently carries out fault diagnosis.Complete
Portion's parameter interface describes all of thermal parameter of unit and electrical parameter, including heat source loop and low-temperature receiver loop, working medium loop institute
There is the important parameter value of pressure, temperature collection value and the Fitting Calculation.Operational factor interface can be entered to the feedback quantity of PLC controls
Row modification, as PLC control electric T-shaped valve open needed for super heat value, working medium pump startup when frequency, working medium pump frequency converter
Adjust automatically cycle, working medium pump frequency change step, generator target frequency, generator overdrive rate.Tendency chart interface shows
Show the dynamic trend that heat source temperature, sink temperature, load waveform and all parts inlet and outlet pressure, temperature are changed over time,
It is easy to find rule and pinpoints the problems, accomplishes realtime curve with record.ORC control systems interface on show
The important parameter enthalpy of R245fa, the degree of superheat, degree of supercooling are believed using the temperature of PLC logic control element collecting temperature sensors
Number and pressure sensor pressure signal as |input paramete, then calculate R245fa working medium using fitting formula unknown
The important parameter such as degree of superheat, evaporating temperature, condensation temperature, enthalpy etc., directly carry out logic feedback using these signals, realize certainly
Dynamic control, it is to avoid the trouble of inquiry R245fa tables, more facilitates, and fitting formula is as follows：
(1) evaporating temperature Tsat,P1(℃)
Wherein Pp,outIt is working medium pump discharge pressure collection value.
(2) condensation temperature Tsat,P2(℃)
Wherein Pp,inIt is working medium pump inlet pressure collection value.
(3) evaporator outlet degree of superheat Teva,sup(℃)
Teva,sup=Teva,out-Tsat,p1
Wherein Teva,outIt is evaporator outlet (bypass) collection value, Tsat,p1It is evaporating temperature value.
(4) expander inlet degree of superheat Texp,sup(℃)
Texp,sup=Texp,in-Tsat,p1
Wherein Texp,inIt is expander inlet temperature collection value, Tsat,p1It is evaporating temperature value.
(5) expander inlet enthalpy calculates Hexp,i(kJ/kg)
Wherein Tsat,p1It is evaporating temperature value, Texp,supIt is expander inlet degree of superheat calculated value.
(6) expander outlet degree of superheat Texp,sup2
Texp,sup2=Texp,out-Tsat,p2
Wherein Texp,outIt is expander outlet temperature collection value, Tsat,p2It is condensing temperature value.
(7) expander outlet enthalpy calculates Hexp, o (kJ/kg)
Wherein Tsat,p2It is condensing temperature value, Texp,sup2It is expander outlet degree of superheat calculated value.
(8) pump intake enthalpy calculates Hp, in (kJ/kg)
Hp,in=200.3827+1.2708Tp,in+0.000896Tp,in 2
+1.0855×10-6Tp,in 3+2.0780×10-8Tp,in 4
Wherein Hp,inIt is working medium pump inlet temperature collection value.
(9) pump discharge enthalpy calculates Heva,in(kJ/kg)
Heva,in=200.3827+1.2708Tp,out+0.000896Tp,out 2
+1.0855×10-6Tp,out 3+2.0780×10-8Tp,out 4
Wherein Tp,outIt is working medium pump outlet temperature collection value.
This embodiment is only the present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
Should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (7)
1. a kind of unattended formula organic Rankine bottoming cycle isolated network power generation monitoring system, it is characterised in that including organic Rankine bottoming cycle
Electricity generation system and ORC monitor control systems, the organic Rankine cycle power generation system include flowmeter (4), pressure sensor
(5), temperature sensor (6), working medium pump (10), evaporator (11), electric T-shaped valve (12), expanding machine (13), generator (14),
Condenser (15), heat source loop (16), cooling circuit (17), the monitor control system include that touch-screen (1), PLC controls are single
First (2), working medium pump frequency converter (3), relay (7), alarm (8), multi-functional electrodymamometer (9)；The working medium pump (10), steaming
Hair device (11), electric T-shaped valve (12), expanding machine (13), condenser (15) join end to end successively, the electric T-shaped valve (12)
Entrance of another way outlet directly with the condenser (15) be connected, the expanding machine (13) and generator (14) coaxial phase
Even, the flowmeter (4) installed in the outlet of working medium pump (10), pacify respectively by four groups of pressure sensors (5) and temperature sensor (6)
On the export pipeline of working medium pump (10) outlet, evaporator (11) outlet, expanding machine (13) outlet and condenser (15), touch
Touch and be connected by electric wire between screen (1) and PLC control unit (2), relay (7), alarm (8), multifunctional electric meter
(9), it is connected by electric wire between working medium pump frequency converter (3) and PLC control unit (2), working medium pump frequency converter (3) and working medium pump
(10) motor is connected by electric wire, heat source loop (16) and cooling circuit (17) by wire respectively with PLC control unit (2)
It is linked to be closed-loop path.
2. a kind of unattended formula organic Rankine bottoming cycle isolated network power generation monitoring system according to claim 1, it is characterised in that
The ORC monitor control systems include two kinds of operational modes of manual mode and automatic mode, and both of which can be in the head of touch-screen
Switched on page plate.
3. a kind of unattended formula organic Rankine bottoming cycle isolated network power generation monitoring system according to claim 2, its feature exists
In, the manual mode that the ORC monitor control systems include, the frequency converter frequency and working medium pump of working medium pump are manually adjusted
Stroke carrys out the power output and rotating speed of regulator generator；It is steady that the automatic mode that the ORC monitor control systems include is used for unit
It is fixed to generate electricity, in the case where thermal source and low-temperature receiver fluctuate, working medium pump frequency converter is adjusted by the feedback of electric power meter output frequency
Frequency.
4. a kind of unattended formula organic Rankine bottoming cycle isolated network power generation monitoring system according to claim 1, its feature exists
In the method for work of the system is as follows：
Step A：The system Cooling and Heat Source parameter of setting is regulated, is powered to unit, touch-screen (1) automatic is first according to institute
Needing power carries out manual mode regulation, by working medium pump regulation to specified stroke；
Step B：Working medium pump frequency converter (3) automatic；
Step C：When the feedback of evaporator outlet degree of superheat analog signal is more than setting value, electric T-shaped valve (12) is automatic tangential
Expanding machine (13) side, while grease pump starts, lubricating oil is lubricated to expanding machine (13), and expanding machine (13) is rotated and drives hair
Motor (14) is powered；
Step D：Feedback according to multi-functional electrodymamometer (9) three-phase rate-adaptive pacemaker adjusts working medium pump frequency converter (3) frequency, makes
Generator (14) rotating speed reaches declared working condition；
Step E：When generator (14) rotating speed fluctuates in 3000 ± 200RPM scopes, the excitation AVR of generator (14) starts work
Make, make output three-phase voltage stabilization in 400 ± 5V；
Step F：When the load increases, generator (14) three-phase frequency reduction, automatic control system starts, and adjusts working medium pump frequency conversion
Device (3) frequency, makes generator (14) rotating speed reach declared working condition；
Step G：When load reduces or is breaking suddenly, expanding machine (13) stall, the automatic tangential bypass of electric T-shaped valve (12)
Side, grease pump is closed；
Step H：At the end of run time, the automatic tangential bypass side of electric T-shaped valve (12), grease pump is closed, working medium pump (10)
Automatic low discharge operation, after after unit cooling, closes working medium pump (10), and unit is powered off.
5. a kind of unattended formula organic Rankine bottoming cycle isolated network power generation monitoring system according to claim 1, its feature exists
In the system includes following alarm amount and corresponding processing scheme：
A, expanding machine stall, i.e. synchronous excitation generator three-phase electricity frequency are more than 58HZ；
Processing scheme：Electric T-shaped valve tangentially bypasses side automatically, and grease pump is closed, and buzzer warning is opened；
B, the operation of working medium pump frequency converter are abnormal, automatically control failure；
Processing scheme：Electric T-shaped valve tangentially bypasses side automatically, and grease pump is closed, and working medium pump Frequency Converter Control stops；
C, the alarm of synchronous excitation generator phase shortage, when UVW three-phases monophase current is 0, phase shortage alarm starts；
Processing scheme：Electric T-shaped valve tangentially bypasses side automatically, and grease pump is closed, and buzzer warning is opened, shutdown inspection；
When d, the expander inlet degree of superheat are not enough, there is hygral expansion in expanding machine；
Processing scheme：Ejection warning window, buzzer warning is opened, and manually heightens heat source temperature or flow；
E, cooling go wrong, and high pressure, condensing pressure superpressure occurs in unit；
Processing scheme：Ejection warning window, 0.8Mpa safety valves are upspring pressure release automatically on fluid reservoir；
F, expanding machine stop operating suddenly；
Processing scheme：Electric T-shaped valve tangentially bypasses side automatically, and grease pump is closed, while PLC control unit controlled medium pump
Frequency converter reduces frequency, so that reduce working medium flow, control system interface ejection warning window, display alarm reason, buzzer
Alarm is opened；
When g, working medium pump intake degree of supercooling are less than 3 DEG C, i.e., cooling circuit goes wrong；
Processing scheme：Electric T-shaped valve tangentially bypasses side automatically, and grease pump is closed, while PLC control unit controlled medium pump
Frequency converter reduces frequency, so as to reduce working medium flow, PLC control unit sends instruction to the triple valve of thermal source, and thermal source is entered
The pass-through state of unit switches to bypass condition, control system interface ejection warning window, display alarm reason, buzzer warning
Open.
6. a kind of unattended formula organic Rankine bottoming cycle isolated network power generation monitoring system according to claim 1, its feature exists
In the organic Rankine bottoming cycle is using R245fa as working medium.
7. a kind of unattended formula organic Rankine bottoming cycle isolated network power generation monitoring system according to claim 1, its feature exists
In the enthalpy of the R245fa working medium shown by the touch-screen, the degree of superheat, degree of supercooling, evaporating temperature, the unknown ginseng of condensation temperature
Number, the pressure signal that the temperature signal gathered temperature sensor by the use of PLC control unit and pressure sensor are gathered is used as defeated
Enter parameter, then calculated using fitting formula and automatically obtained, directly carry out logic feedback using these signals, realize automatic control
System.
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| CN108301887B (en) * | 2017-12-08 | 2020-06-26 | 上海电力学院 | Combined cooling, heating and power generation and organic Rankine cycle combined system |
| CN110307051A (en) * | 2019-07-13 | 2019-10-08 | 苏州西达透平动力技术有限公司 | A kind of land test macro and its test method of autonomous underwater vehicle power performance |
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| CN112682118B (en) * | 2020-12-01 | 2022-11-11 | 中国船舶重工集团公司第七0三研究所 | ORC power generation system control method |
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| CN114673570A (en) * | 2022-05-30 | 2022-06-28 | 安徽润安思变能源技术有限公司 | ORC system startup and grid connection system and method |
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