CN108491007B - The control method and device of cooling heating and power generation system - Google Patents
The control method and device of cooling heating and power generation system Download PDFInfo
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- CN108491007B CN108491007B CN201810262251.5A CN201810262251A CN108491007B CN 108491007 B CN108491007 B CN 108491007B CN 201810262251 A CN201810262251 A CN 201810262251A CN 108491007 B CN108491007 B CN 108491007B
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- G—PHYSICS
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- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
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Abstract
The invention discloses a kind of control method and device of cooling heating and power generation system, wherein method includes: outlet temperature, enthalpy and the entropy that low pressure compressor is obtained according to the exit pressure levels of low pressure compressor, suction temperature, pressure and isentropic efficiency；Outlet temperature, enthalpy and the entropy of high pressure compressor are obtained according to the isentropic efficiency of the admission pressure of turbine and high pressure compressor；The heat exchange amount of heat exchanger of the cooling heating and power generation system, amount of work of turbine, the wasted work amount of high pressure compressor, the wasted work amount of low pressure compressor, main for the heat exchange amount of cooler and the heating amount of heater is obtained, to obtain integrated heat efficiency；The optimal intermediate pressure value of low pressure compressor is obtained, according to integrated heat efficiency to control the compression process between main refrigeration system and electricity generation system by the outlet pressure for adjusting low pressure compressor.This method can effectively improve the integrated heat efficiency of cooling heating and power generation system, while improve the flexibility adjusted between generated energy, refrigerating capacity and the heating capacity of cooling heating and power generation system.
Description
Technical field
The present invention relates to energy technology field, in particular to a kind of control method and device of cooling heating and power generation system.
Background technique
In recent years, countries in the world show greatly to pay close attention to the variation aspect of weather.For novel refrigerant alternative
Research have become heat subject.The substitution freon refrigerant (such as: R134a) that is widely used at present though ozone will not be destroyed
Layer, but serious greenhouse effects can be caused.In natural refrigerant such as water, air, ammonia and carbon dioxide and other fluids, carbon dioxide is only
One working medium that is non-combustible and nontoxic, and being run in the steam compression cycle lower than 0 DEG C.
It is high-efficient as the Bretton power circulation system of working medium using supercritical CO 2, with subcritical water steam circulation, helium cloth
Thunder circulation etc. is compared, and is had near 700 DEG C of heat source temperature by the Brayton cycle dynamical system of working medium of supercritical CO 2
Higher thermal efficiency of cycle, the thermal efficiency reaches as high as 52% in the extraction cycle of partial shrinkage.It is working medium across facing using CO2
Boundary's Teat pump boiler is more preferable than the system performance using conventional working medium, and transcritical CO_2 compression-type refrigeration air-conditioning system is in Energy Efficiency Ratio
On also become closer to system using other working medium.On the basis of transcritical CO_2 compression-type refrigerating system, using injector
The restriction loss of supercritical pressure CO2, the energy of further lifting system when substituting conventional throttle device, can be effectively reduced
Effect ratio.
If realizing that organic knot of refrigeration cycle is sprayed-compressed to supercritical CO 2 Bretton power generation cycle and transcritical CO_2
It closes, will be expected to establish efficiently based on the integrated cooling heating and power generation system of natural refrigerant CO2.Conventional method is to follow two
Ring is directly connected as shown in Figure 1, the CO2 of i.e. turbine outlet enters injector after supercooling, and the gaseous state CO2 of injector outlet is logical
Cross the inlet pressure that a compressor is directly compressed to turbine.However, the main problem of this method is: compressor presence is very big
Pressure ratio, compression efficiency is low, wasted work is big.Meanwhile the cooling heating and power generation system of the relevant technologies often exist semen donors, heating load and
The strong disadvantage of coupling between generated energy can not be made and quickly and easily adjust for specific hot and cold and electric changes in demand.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, an object of the present invention is to provide a kind of control method of cooling heating and power generation system, this method can be with
The integrated heat efficiency for effectively improving cooling heating and power generation system improves generated energy, refrigerating capacity and the heating capacity of cooling heating and power generation system
Between the flexibility that adjusts.
It is another object of the present invention to the control devices for proposing a kind of cooling heating and power generation system.
In order to achieve the above objectives, one aspect of the present invention embodiment proposes a kind of control method of cooling heating and power generation system,
High pressure compressor and low pressure compressor, and described are provided between the main refrigeration system and electricity generation system of cooling heating and power generation system
Cooler is provided between one compressor and second compressor, wherein method is the following steps are included: according to the low pressure pressure
Exit pressure levels, suction temperature, pressure and the isentropic efficiency of contracting machine obtain outlet temperature, enthalpy and the entropy of the low pressure compressor；
According to the isentropic efficiency of the admission pressure of turbine and the high pressure compressor obtain the outlet temperature of the high pressure compressor, enthalpy and
Entropy；Obtain the consumption of the heat exchange amount of the heat exchanger of the cooling heating and power generation system, the amount of work of the turbine, the high pressure compressor
It is function amount, the wasted work amount of the low pressure compressor, main for the heat exchange amount of cooler and the heating amount of heater, to obtain comprehensive thermal effect
Rate；The optimal intermediate pressure value of the low pressure compressor is obtained according to the integrated heat efficiency, by adjusting the low pressure pressure
The outlet pressure of contracting machine controls the compression process between the main refrigeration system and the electricity generation system.
The control method of the cooling heating and power generation system of the embodiment of the present invention passes through the suction temperature and pressure of low pressure compressor
Optimal low pressure compressor exhaust pressure value is calculated using thermodynamic principles with the pressure at expulsion of high pressure compressor, with control
The compressor of main refrigeration system and electricity generation system has so as to quickly be adjusted according to cold and hot and electric changes in demand
Effect improve cooling heating and power generation system integrated heat efficiency, improve cooling heating and power generation system generated energy, refrigerating capacity and heating capacity it
Between the flexibility that adjusts.
In addition, the control method of cooling heating and power generation system according to the above embodiment of the present invention can also have following add
Technical characteristic:
Further, in one embodiment of the invention, it the main refrigeration system and is provided between electricity generation system
Four-way valve, the method also includes: the connection and separation of main refrigeration system and the electricity generation system are controlled by the four-way valve,
To obtain the target refrigerating capacity of the main refrigeration system and the target generated energy of the electricity generation system.
Further, in one embodiment of the invention, the heating system of the cooling heating and power generation system and secondary refrigeration
Multiple regulating valves are provided between system, wherein the method also includes: the aperture of the aperture of the regulating valve is adjusted, to divide
The caloric receptivity of the gas generator of the heating system and the secondary refrigeration system is not obtained, to obtain the secondary refrigeration system
The target heating capacity of target refrigerating capacity and the heating system.
Further, in one embodiment of the invention, the above method further include: detect the cooling heating and power generation system
Current working；Refrigerating capacity, heating capacity and generated energy are increased or decreased according to current working control.
Further, in one embodiment of the invention, wherein if the current working is cogeneration, institute
It states electricity generation system and heating system while running；If the current working is supply of cooling, heating and electrical powers, and the electricity generation system, described
Heating system, the secondary refrigeration system are run simultaneously, then increase the refrigerating capacity, reduce the heating capacity；If described current
Operating condition is supply of cooling, heating and electrical powers, and the electricity generation system, the heating system, the main refrigeration system are run simultaneously, then increase institute
Refrigerating capacity is stated, the generated energy is reduced；If the current working is supply of cooling, heating and electrical powers, and the electricity generation system, the heating
System, the secondary refrigeration system and the main refrigeration system are run simultaneously, then increase the refrigerating capacity, reduce the heating capacity with
The generated energy.
In order to achieve the above objectives, another aspect of the present invention embodiment proposes a kind of control dress of cooling heating and power generation system
It sets, high pressure compressor and low pressure compressor, and institute is provided between the main refrigeration system and electricity generation system of cooling heating and power generation system
It states and is provided with cooler between the first compressor and second compressor, wherein device includes: the first acquisition module, is used for
Going out for the low pressure compressor is obtained according to the exit pressure levels of the low pressure compressor, suction temperature, pressure and isentropic efficiency
Mouth temperature, enthalpy and entropy；Second obtains module, for being obtained according to the admission pressure of turbine and the isentropic efficiency of the high pressure compressor
To the outlet temperature of the high pressure compressor, enthalpy and entropy；Third obtains module, for obtaining changing for the cooling heating and power generation system
The heat exchange amount of hot device, the amount of work of the turbine, the wasted work amount of the high pressure compressor, the wasted work amount of the low pressure compressor,
It is main for the heat exchange amount of cooler and the heating amount of heater, to obtain integrated heat efficiency；First control module, for according to described comprehensive
The optimal intermediate pressure value that the thermal efficiency obtains the low pressure compressor is closed, to pass through the outlet pressure for adjusting the low pressure compressor
Control the compression process between the main refrigeration system and the electricity generation system.
The control device of the cooling heating and power generation system of the embodiment of the present invention passes through the suction temperature and pressure of low pressure compressor
Optimal low pressure compressor exhaust pressure value is calculated using thermodynamic principles with the pressure at expulsion of high pressure compressor, with control
The compressor of main refrigeration system and electricity generation system has so as to quickly be adjusted according to cold and hot and electric changes in demand
Effect improve cooling heating and power generation system integrated heat efficiency, improve cooling heating and power generation system generated energy, refrigerating capacity and heating capacity it
Between the flexibility that adjusts.
In addition, the control device of cooling heating and power generation system according to the above embodiment of the present invention can also have following add
Technical characteristic:
Further, in one embodiment of the invention, it the main refrigeration system and is provided between electricity generation system
Four-way valve, described device further include: the 4th obtains module, for controlling main refrigeration system and the power generation by the four-way valve
The connection and separation of system, to obtain the target refrigerating capacity of the main refrigeration system and the target generated energy of the electricity generation system.
Further, in one embodiment of the invention, the heating system of the cooling heating and power generation system and secondary refrigeration
Multiple regulating valves are provided between system, wherein described device further include: the 5th obtains module, for adjusting the regulating valve
Aperture aperture, to obtain the caloric receptivity of the gas generator of the heating system and the secondary refrigeration system respectively, with
To the secondary target refrigerating capacity of refrigeration system and the target heating capacity of the heating system.
Further, in one embodiment of the invention, above-mentioned apparatus further include: detection module, it is described for detecting
The current working of cooling heating and power generation system；Second control module, for increasing or decreasing refrigeration according to current working control
Amount, heating capacity and generated energy.
Further, in one embodiment of the invention, wherein if the current working is cogeneration, institute
It states electricity generation system and heating system while running, if the current working is supply of cooling, heating and electrical powers, and the electricity generation system, described
Heating system, the secondary refrigeration system are run simultaneously, then increase the refrigerating capacity, reduce the heating capacity, if described current
Operating condition is supply of cooling, heating and electrical powers, and the electricity generation system, the heating system, the main refrigeration system are run simultaneously, then increase institute
Refrigerating capacity is stated, reduces the generated energy, and if the current working is supply of cooling, heating and electrical powers, and is the electricity generation system, described
Heating system, the secondary refrigeration system and the main refrigeration system are run simultaneously, then increase the refrigerating capacity, reduce the heating
Amount and the generated energy.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is the structural schematic diagram according to the cooling heating and power generation system of the relevant technologies；
Fig. 2 is the structural schematic diagram according to the cooling heating and power generation system of one embodiment of the invention；
Fig. 3 is the flow chart according to the control method of the cooling heating and power generation system of one embodiment of the invention；
Fig. 4 is the structural schematic diagram according to the control device of the cooling heating and power generation system of one embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Before the control method and device for the cooling heating and power generation system for introducing the embodiment of the present invention, first simply introduce
The structure of the cooling heating and power generation system of the embodiment of the present invention.
The embodiment of the present invention is with supercritical CO2Bretton power generation cycle, Trans-critical cycle CO2Injection-compression refrigeration cycle and organic
The cooling heating and power generation system that working medium jet refrigeration circulation combines, the system include electricity generation system, main refrigeration system, secondary refrigeration system
System and heating system.Wherein, the working medium of electricity generation system, heating system and main refrigeration system can be CO2；The work of secondary refrigeration system
Matter can be water, R245fa etc..
As shown in Fig. 2, cooling heating and power generation system includes heater 1, turbine 2, regenerator 3, heater 4, cooler 5, four
It is port valve 6, high pressure compressor 7, main ejector 8, separator 9, low pressure compressor 10, cooler 11, throttle valve 12, main for cooler
13, gas generator 14, secondary injector 15, cooler 16, throttle valve 17, pair for cooler 18, circulating pump 19, regulating valve 20 and are adjusted
Save valve 21.
Wherein, heater is a heat-exchanger rig, for absorbing heat from heat source, promoting CO2 temperature；Turbine is acting component,
Compressed CO_2 expands in turbine, pressure and temp declines, and drives engine output power；Regenerator is a heat-exchanger rig, for heat
The measure of the common lifting system thermal efficiency of mechanics field；Heater, cooler, it is main for cooler, it is secondary for cooler be heat-exchanger rig,
It is exchanged for the heat between system and the external world；The effect of main ejector and secondary injector is the connected lowpressure stream of suction
Body；Low pressure compressor is used to the low-pressure gas of separator outlet being compressed to an intermediate pressure, such as is compressed to from 4MPa
8MPa；High pressure compressor is used to the medium pressure gas of low-pressure compressor outlet being compressed to higher pressure, such as is compressed to from 8MPa
16MPa；Gas generator is a heat-exchanger rig, for the circulating-pump outlet liquid of secondary refrigeration system to be heated to gaseous state；Section
Stream valve is decompressing or throttling device；Regulating valve is flow regulation and control device.
The control method and device of the cooling heating and power generation system proposed according to embodiments of the present invention are described with reference to the accompanying drawings,
The control method of the cooling heating and power generation system proposed according to embodiments of the present invention is described with reference to the accompanying drawings first.
Fig. 3 is the flow chart of the control method of the cooling heating and power generation system of one embodiment of the invention.
As shown in figure 3, the control method of the cooling heating and power generation system, the main refrigeration system and power generation of cooling heating and power generation system
It is provided with high pressure compressor and low pressure compressor between system, and is provided with cooling between a first compressor and a second compressor
Device, wherein method the following steps are included:
In step S301, obtained according to the exit pressure levels of low pressure compressor, suction temperature, pressure and isentropic efficiency low
Press outlet temperature, enthalpy and the entropy of compressor.
It is understood that the outlet pressure of low pressure compressor is adjustable, by the suction temperature of low pressure compressor and
The pressure at expulsion of pressure and high pressure compressor calculates optimal low pressure compressor exhaust pressure value using thermodynamic principles.
Specifically, the embodiment of the present invention assumes initially that a low-pressure compressor outlet pressure value, Pm, then according to low pressure
The suction temperature T of compressora, pressure Pa, utilize the isentropic efficiency η of low pressure compressor1, calculate the outlet temperature of low pressure compressor
Tb, enthalpy hbWith entropy sb, and calculated using following formula:
Tb=f1(Ta,Pa,Pm,η1),
hb=f2(Ta,Pa,Pm,η1),
sb=f3(Ta,Pa,Pm,η1),
In formula, f1,f2And f3CO can respectively be passed through2Data Base of Chemical Compound (such as NIST Refprop) obtain.
In step s 302, high pressure compressor is obtained according to the isentropic efficiency of the admission pressure of turbine and high pressure compressor
Outlet temperature, enthalpy and entropy.
Specifically, admission pressure P of the embodiment of the present invention according to turbinec, and utilize the isentropic efficiency of high pressure compressor
η2, calculate the outlet temperature T of high pressure compressorc, enthalpy hcWith entropy sc, specific formula for calculation are as follows:
Tc=f4(Tb,Pm,Pc,η2),
hc=f5(Tb,Pm,Pc,η2),
sc=f6(Tb,Pm,Pc,η2),
In formula, f4,f5And f6CO can respectively be passed through2Data Base of Chemical Compound (such as NIST Refprop) obtain.
In step S303, the heat exchange amount of the heat exchanger of cooling heating and power generation system, the amount of work of turbine, high pressure compressed are obtained
It is the wasted work amount of machine, the wasted work amount of low pressure compressor, main for the heat exchange amount of cooler and the heating amount of heater, to obtain comprehensive thermal effect
Rate.
It is understood that the embodiment of the present invention is utilized respectively the heat exchange amount of each heat exchanger of heat Balance Calculation, calculate separately
Amount of work P, the high pressure compressor wasted work amount P of turbine2, low pressure compressor wasted work amount P2, the main heat exchange amount Q for coolerc, heater
Heating amount Q, and pass through following formula calculate combined cooling and power integrated heat efficiency, formula are as follows:
ηIt is comprehensive=(P-P1-P2+Qc)/Q。
In step s 304, the optimal intermediate pressure value of low pressure compressor is obtained according to integrated heat efficiency, is adjusted with passing through
The outlet pressure of low pressure compressor controls the compression process between main refrigeration system and electricity generation system.
It is understood that the embodiment of the present invention goes out by repeating above-mentioned steps, and by changing low pressure compressor
Mouth pressure value Pm, obtain a series of ηIt is comprehensive, find out peak, P at this timemAs optimal intermediate pressure value.
To sum up, the compression process between main refrigeration system and electricity generation system is had between compressor and compressor using two
Cooler, wherein the outlet pressure of low pressure compressor is adjustable, realizes that an optimal intermediate pressure connects supercritical CO2Cloth
Thunder power generation cycle and Trans-critical cycle CO2Injection-compression refrigeration cycle.
Further, in one embodiment of the invention, main refrigeration system and four-way is provided between electricity generation system
Valve, the method for the embodiment of the present invention further include: the connection and separation of main refrigeration system and electricity generation system are controlled by four-way valve, with
Obtain the target refrigerating capacity of main refrigeration system and the target generated energy of electricity generation system.
It is understood that four-way valve may be implemented main refrigeration system and the connection of electricity generation system and separate, and then realize
The adjusting of refrigerating capacity and generated energy.
Further, in one embodiment of the invention, the heating system of cooling heating and power generation system and secondary refrigeration system
Between be provided with multiple regulating valves, wherein the method for the embodiment of the present invention further include: adjust the aperture of the aperture of regulating valve, with
The caloric receptivity of the gas generator of heating system and secondary refrigeration system is obtained, respectively to obtain the target refrigerating capacity of secondary refrigeration system
With the target heating capacity of heating system.
Specifically, the embodiment of the present invention is just adjustable heating system and secondary refrigeration by changing control valve opening size
The caloric receptivity of system gas generator, and then realize the adjusting of refrigerating capacity and heating capacity.
Further, in one embodiment of the invention, the method for the embodiment of the present invention further include: detect cold and hot Electricity Federation
For the current working of system；Refrigerating capacity, heating capacity and generated energy are increased or decreased according to current working control.
In one embodiment of the invention, wherein if current working is cogeneration, electricity generation system and heating system
It unites while running；If current working is supply of cooling, heating and electrical powers, and electricity generation system, heating system, secondary refrigeration system are run simultaneously, then
Increase refrigerating capacity, reduces heating capacity；If current working is supply of cooling, heating and electrical powers, and electricity generation system, heating system, main refrigeration system
It runs simultaneously, then increases refrigerating capacity, reduce generated energy；If current working is supply of cooling, heating and electrical powers, and electricity generation system, heating are
System, secondary refrigeration system and main refrigeration system are run simultaneously, then increase refrigerating capacity, reduce heating capacity and generated energy.
Specifically, (1) electricity generation system, heating system are run simultaneously, cogeneration is provided；
(2) electricity generation system, heating system, secondary refrigeration system are run simultaneously, provide supply of cooling, heating and electrical powers；Compared to mode (1), this
Shi Lengliang supply increases, heat supply is reduced；
(3) electricity generation system, heating system, main refrigeration system are run simultaneously, provide supply of cooling, heating and electrical powers；Compared to mode (1), this
Shi Lengliang supply increases, electricity supply is reduced；
(4) electricity generation system, heating system, secondary refrigeration system and main refrigeration system are run simultaneously, provide supply of cooling, heating and electrical powers.Phase
Than mode (1), cooling capacity supply at this time increases, heat and electricity supply are reduced.
To sum up, the embodiment of the present invention uses supercritical CO2Bretton power generation cycle, Trans-critical cycle CO2Injection-compression refrigeration is followed
The cooling heating and power generation system that ring and organic working medium jet refrigeration circulation combine, wherein between main refrigeration system and electricity generation system
Compression process has cooler using two between compressor and compressor.The outlet pressure of low pressure compressor is adjustable, leads to
The suction temperature of low pressure compressor and the pressure at expulsion of pressure and high pressure compressor are crossed, using thermodynamic principles, is calculated optimal
Low pressure compressor exhaust pressure value.Four-way valve 6 may be implemented main refrigeration system and the connection of electricity generation system and separate, Jin Ershi
The adjusting of existing refrigerating capacity and generated energy.
The control method of the cooling heating and power generation system proposed according to embodiments of the present invention, in supercritical CO2Bretton power generation
Circulation and Trans-critical cycle CO2Two compressors are arranged between injection-compression refrigeration cycle, realize whole system by adjusting intermediate pressure
The optimization for performance of uniting, while realizing using four-way valve the coupling and decoupling of main refrigeration system and electricity generation system, utilize regulating valve
The integrated heat efficiency for adjusting heating system and secondary refrigeration system, improves generated energy, refrigerating capacity and the heating of cooling heating and power generation system
The flexible modulation of amount.
Referring next to the control device for the cooling heating and power generation system that attached drawing description proposes according to embodiments of the present invention.
Fig. 4 is the structural schematic diagram of the control device of the cooling heating and power generation system of one embodiment of the invention.
As shown in figure 4, the control device 100 of the cooling heating and power generation system, the main refrigeration system of cooling heating and power generation system with
It is provided with high pressure compressor and low pressure compressor between electricity generation system, and is provided between a first compressor and a second compressor cold
But device, wherein the device 100 that the present invention is implemented includes: that the first acquisition module 110, second obtains module 120, third obtains mould
Block 130 and the first control module 140.
Wherein, the first acquisition module 110 is used for according to the exit pressure levels of low pressure compressor, suction temperature, pressure and waits
Outlet temperature, enthalpy and the entropy of entropic efficiency acquisition low pressure compressor.Second obtain module 120 be used for according to the admission pressure of turbine and
The isentropic efficiency of high pressure compressor obtains outlet temperature, enthalpy and the entropy of high pressure compressor.It is cold for obtaining that third obtains module 130
The heat exchange amount of the heat exchanger of cogeneration system, the amount of work of turbine, the wasted work amount of high pressure compressor, the wasted work of low pressure compressor
It is amount, main for the heat exchange amount of cooler and the heating amount of heater, to obtain integrated heat efficiency.First control module 140 is used for basis
Integrated heat efficiency obtains the optimal intermediate pressure value of low pressure compressor, to control master by the outlet pressure for adjusting low pressure compressor
Compression process between refrigeration system and electricity generation system.The device 100 of the embodiment of the present invention realizes main system using four-way valve simultaneously
The coupling and decoupling of cooling system and electricity generation system are realized using the caloric receptivity of regulating valve adjustment heating system and secondary refrigeration system
The flexible modulation of the generated energy of cooling heating and power generation system, refrigerating capacity and heating capacity
Further, in one embodiment of the invention, main refrigeration system and four-way is provided between electricity generation system
Valve, the device 100 of the embodiment of the present invention further include: the 4th obtains module.4th, which obtains module, is used to control master by four-way valve
The connection and separation of refrigeration system and electricity generation system, to obtain the target refrigerating capacity of main refrigeration system and the target hair of electricity generation system
Electricity.
Further, in one embodiment of the invention, the heating system of cooling heating and power generation system and secondary refrigeration system
Between be provided with multiple regulating valves, wherein the device 100 of the embodiment of the present invention further include: the 5th obtain module.5th obtains mould
Block is used to adjust the aperture of the aperture of regulating valve, to obtain the heat absorption of the gas generator of heating system and secondary refrigeration system respectively
Amount, to obtain the target refrigerating capacity of secondary refrigeration system and the target heating capacity of heating system.
Further, in one embodiment of the invention, the device 100 of the embodiment of the present invention further include: detection module
With the second control module.
Wherein, detection module is used to detect the current working of cooling heating and power generation system.Second control module is used for basis and works as
Preceding operating conditions increase or decrease refrigerating capacity, heating capacity and generated energy.
Further, in one embodiment of the invention, wherein if current working is cogeneration, generating electricity is
System and heating system run simultaneously, if current working be supply of cooling, heating and electrical powers, and electricity generation system, heating system, pair refrigeration system
It runs simultaneously, then increases refrigerating capacity, reduce heating capacity, if current working is supply of cooling, heating and electrical powers, and electricity generation system, heating are
System, main refrigeration system are run simultaneously, then increase refrigerating capacity, reduce generated energy, and if current working is supply of cooling, heating and electrical powers, and
Electricity generation system, heating system, secondary refrigeration system and main refrigeration system are run simultaneously, then increase refrigerating capacity, reduce heating capacity and hair
Electricity.
It should be noted that the explanation of the aforementioned control method embodiment to cooling heating and power generation system is also applied for this
The control device of the cooling heating and power generation system of embodiment, details are not described herein again.
The control device of the cooling heating and power generation system proposed according to embodiments of the present invention, in supercritical CO2Bretton power generation
Circulation and Trans-critical cycle CO2Two compressors are arranged between injection-compression refrigeration cycle, realize whole system by adjusting intermediate pressure
The optimization for performance of uniting, while realizing using four-way valve the coupling and decoupling of main refrigeration system and electricity generation system, utilize regulating valve
The integrated heat efficiency for adjusting heating system and secondary refrigeration system, improves generated energy, refrigerating capacity and the heating of cooling heating and power generation system
The flexible modulation of amount.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of control method of cooling heating and power generation system, which is characterized in that the main refrigeration system and hair of cooling heating and power generation system
It is provided with high pressure compressor and low pressure compressor between electric system, and is set between the high pressure compressor and the low pressure compressor
Be equipped with cooler, wherein method the following steps are included:
The low pressure compressor is obtained according to the exit pressure levels of the low pressure compressor, suction temperature, pressure and isentropic efficiency
Outlet temperature, enthalpy and entropy；
According to the isentropic efficiency of the admission pressure of turbine and the high pressure compressor obtain the high pressure compressor outlet temperature,
Enthalpy and entropy；
Obtain the heat exchange amount of the heat exchanger of the cooling heating and power generation system, the amount of work of the turbine, the high pressure compressor
It is wasted work amount, the wasted work amount of the low pressure compressor, main for the heat exchange amount of cooler and the heating amount of heater, to obtain comprehensive thermal effect
Rate；And
The optimal intermediate pressure value of the low pressure compressor is obtained according to the integrated heat efficiency, by adjusting the low pressure pressure
The outlet pressure of contracting machine controls the compression process between the main refrigeration system and the electricity generation system.
2. the control method of cooling heating and power generation system according to claim 1, which is characterized in that the main refrigeration system with
Four-way valve is provided between electricity generation system, the method also includes:
The connection and separation of main refrigeration system and the electricity generation system are controlled, by the four-way valve to obtain the main refrigeration system
The target refrigerating capacity of system and the target generated energy of the electricity generation system.
3. the control method of cooling heating and power generation system according to claim 2, which is characterized in that the supply of cooling, heating and electrical powers system
Multiple regulating valves are provided between the heating system of system and secondary refrigeration system, wherein the method also includes:
The aperture of the aperture of the regulating valve is adjusted, to obtain the gas hair of the heating system and the secondary refrigeration system respectively
The caloric receptivity of raw device, to obtain the secondary target refrigerating capacity of refrigeration system and the target heating capacity of the heating system.
4. the control method of cooling heating and power generation system according to claim 3, which is characterized in that further include:
Detect the current working of the cooling heating and power generation system；
Refrigerating capacity, heating capacity and generated energy are increased or decreased according to current working control.
5. the control method of cooling heating and power generation system according to claim 4, which is characterized in that wherein,
If the current working is cogeneration, the electricity generation system and heating system are run simultaneously；
If the current working is supply of cooling, heating and electrical powers, and the electricity generation system, the heating system, the secondary refrigeration system are same
Shi Yunhang then increases the refrigerating capacity, reduces the heating capacity；
If the current working is supply of cooling, heating and electrical powers, and the electricity generation system, the heating system, the main refrigeration system are same
Shi Yunhang then increases the refrigerating capacity, reduces the generated energy；
If the current working is supply of cooling, heating and electrical powers, and the electricity generation system, the heating system, the secondary refrigeration system and
The main refrigeration system is run simultaneously, then increases the refrigerating capacity, reduces the heating capacity and the generated energy.
6. a kind of control device of cooling heating and power generation system, which is characterized in that the main refrigeration system and hair of cooling heating and power generation system
It is provided with high pressure compressor and low pressure compressor between electric system, and is set between the high pressure compressor and the low pressure compressor
It is equipped with cooler, wherein device includes:
First obtains module, for being obtained according to the exit pressure levels of the low pressure compressor, suction temperature, pressure and isentropic efficiency
Take outlet temperature, enthalpy and the entropy of the low pressure compressor；
Second obtains module, for obtaining the high pressure according to the admission pressure of turbine and the isentropic efficiency of the high pressure compressor
Outlet temperature, enthalpy and the entropy of compressor；
Third obtains module, the heat exchange amount of the heat exchanger for obtaining the cooling heating and power generation system, the turbine amount of work,
It is the wasted work amount of the high pressure compressor, the wasted work amount of the low pressure compressor, main for the heat exchange amount of cooler and the heating of heater
Amount, to obtain integrated heat efficiency；And
First control module, for obtaining the optimal intermediate pressure value of the low pressure compressor according to the integrated heat efficiency, with
Outlet pressure by adjusting the low pressure compressor controls compressed between the main refrigeration system and the electricity generation system
Journey.
7. the control device of cooling heating and power generation system according to claim 6, which is characterized in that the main refrigeration system with
Four-way valve, described device are provided between electricity generation system further include:
4th obtains module, for controlling the connection and separation of main refrigeration system and the electricity generation system by the four-way valve,
To obtain the target refrigerating capacity of the main refrigeration system and the target generated energy of the electricity generation system.
8. the control device of cooling heating and power generation system according to claim 7, which is characterized in that the supply of cooling, heating and electrical powers system
Multiple regulating valves are provided between the heating system of system and secondary refrigeration system, wherein described device further include:
5th obtains module, the aperture of the aperture for adjusting the regulating valve, to obtain the heating system and described respectively
The caloric receptivity of the gas generator of secondary refrigeration system, to obtain the target refrigerating capacity and the heating system of the secondary refrigeration system
Target heating capacity.
9. the control device of cooling heating and power generation system according to claim 8, which is characterized in that further include:
Detection module, for detecting the current working of the cooling heating and power generation system；
Second control module, for increasing or decreasing refrigerating capacity, heating capacity and generated energy according to current working control.
10. the control device of cooling heating and power generation system according to claim 9, which is characterized in that wherein,
If the current working is cogeneration, the electricity generation system and heating system are run simultaneously, if described current
Operating condition is supply of cooling, heating and electrical powers, and the electricity generation system, the heating system, the secondary refrigeration system are run simultaneously, then increase institute
Refrigerating capacity is stated, the heating capacity is reduced, if the current working is supply of cooling, heating and electrical powers, and the electricity generation system, the heating
System, the main refrigeration system are run simultaneously, then increase the refrigerating capacity, reduce the generated energy, and if described current
Operating condition is supply of cooling, heating and electrical powers, and the electricity generation system, the heating system, the secondary refrigeration system and the main refrigeration system are same
Shi Yunhang then increases the refrigerating capacity, reduces the heating capacity and the generated energy.
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| CN104808489A (en) * | 2015-03-09 | 2015-07-29 | 山东大学 | Three-level cooperative integrative optimization method for combined cooling heating and power system |
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| CN103629860A (en) * | 2013-12-04 | 2014-03-12 | 重庆大学 | Transcritical CO2 cooling heat and power combined circulation system |
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