CN101275763A - Combined thermal power generation energy supply method and system - Google Patents
Combined thermal power generation energy supply method and system Download PDFInfo
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- CN101275763A CN101275763A CNA2008100181162A CN200810018116A CN101275763A CN 101275763 A CN101275763 A CN 101275763A CN A2008100181162 A CNA2008100181162 A CN A2008100181162A CN 200810018116 A CN200810018116 A CN 200810018116A CN 101275763 A CN101275763 A CN 101275763A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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Abstract
The invention relates to a thermoelectricity tri-generation method and a system thereof, wherein the system includes a thermoelectricity tri-generation set used for generating the electric energy and the heat energy; an air-condition coupled with the thermoelectricity tri-generation set through the power line and for driving the heat pump to generate the heat energy by the electric energy generated by the thermoelectricity tri-generation set; an air-condition ammeter phase coupling with the air-condition specially used for detecting the power consumption of the heat pump in the air-condition; a control device used for obtaining the electric energy of the thermoelectricity tri-generation set and the optimal working point data generated by the heat energy according to the electric consumption data and the energy consumption, and controlling the operation of the thermoelectricity tri-generation set based on the optimal working point data. Adopting the device, the inhabitant heating users are divided into the air-condition heat pump heating users and the hot water type radiator centralized heating users, and the electric energy and the heat energy are supplied to the heating users by the thermoelectricity tri-generation for the requirement in the winter, which reduces the heat road difference in the summer and waiter, advances the energy source using efficiency and the economical profit of the thermal power plant.
Description
Technical field
The present invention particularly about the heating and the billing technology of cogeneration of heat and power, is a kind of combined thermal power generation energy supply method and system about steam power plant's cogeneration of heat and power technology concretely.
Background technology
Cogeneration of heat and power, be meant will ordinary hot power plant after the generating used heat of discharging be used, for industry and family's heating provide with hot technology, this technology can improve the total thermal efficiency of fuel greatly.The generating thermal efficiency in general thermal power plant is about 30～35% in the prior art, and the integrated heat efficiency of cogeneration of heat and power can reach 60～80%.
Resident's winter, summer thermic load consumption demand gap are obvious, in traditional resident's central heating in the winter mode of China, cogeneration of heat and power all moves according to the physical principles of " electricity determining by heat ", and country for steam power plant's operating provisions minimum " thermoelectric than " standard-required, these factors have caused steam power plant to have very big summer in winter production difference, winter heat, all oeprations at full load of electricity, summer, then the heat supply was not gone out, electricity is also sent out and is not gone out, cause the unit under-capacity operation, be difficult to satisfy cooling electric load peak requirements in summer.
Regulate the quality and quantity that draws gas of thermoelectric unit, promptly regulate the thermoelectric ratio of unit, make the many in the winter time heat supplies of unit, can partly reduce winter, summer thermic load gap at multiple electricity in summer.Yet, from second law of thermodynamics angle analysis, winter steam power plant's thermoelectricity than higher, can cause the heat energy of low taste in large supply, and high-grade electric energy supply is few, gross energy
Loss causes thermoelectric unit operational efficiency low, fossil energy that can not saves valuable.Summer, multiple electricity can cause " thermoelectric ratio " not reach the standard of national requirements again.
Air-conditioning heat pump heating technology and radiator pipeline hot water heating technology are as existing heating technology of the present invention.Chinese invention patent, the patent No. are 00100102.7 to disclose a kind of double source heating air-conditioner system and utilized the method for this system's heat supply/cooling.The disclosed technical scheme of this patent of invention is incorporated in this, with as prior art of the present invention.
Air-conditioning heat pump power consumption heating and energy saving is efficient, but because electricity price rate height, compares with the hot-water type radiator heating to be in absolute cost inferior position.Cause the resident to be unwilling to adopt the present situation of air-conditioning heat pump heating, also therefore strengthened the load pressure of steam power plant's hot-water type radiator central heating, caused the greatest differences of steam power plant's winter, summer thermic load.
Summary of the invention
The invention provides a kind of combined thermal power generation energy supply method and system, thermic load difference in order to minimizing steam power plant's winter, Xia Liangji, improve steam power plant's efficiency of energy utilization and economic well-being of workers and staff, and by distinguishing the metering and the charge of air-conditioning heating electricity consumption and other electrical appliance electricity consumptions, reduce air-conditioning heating cost, improve the utilization rate of user's air-conditioning equipment, encourage energy-conservation air-conditioning heat pump heating system.
One of purpose of the present invention is, a kind of combined thermal power generation energy supply system is provided, and described system comprises: cogeneration units is used for output electric energy and heat energy; Air-conditioner is coupled by power line and described cogeneration units, and is driven the heat pump generation heat energy of described air-conditioner by the electric energy that described cogeneration units produces; Radiator is coupled by hot duct and described cogeneration units, and flows into described radiator generation heat energy by the water or the steam of described cogeneration units heating; The air-conditioning ammeter is coupled with described air-conditioner, is used for detecting the power consumption data of the heat pump of described air-conditioner; The heat dissipation gauge table is coupled with described radiator, is used to detect the heat dissipation data of described radiator; Thermic load and electric load transfer of data gathering-device, by various different modes, manual metering for example, the statistics of perhaps registering one's residence, perhaps air-conditioning ammeter and heat dissipation gauge table obtain thermic load and electric load data, by remote meter reading, perhaps wireless transmission, perhaps mode such as internet communication is given this transfer of data the control device that is positioned at thermoelectric factory and office; Control device, with each heating user's of being received thermic load and the electric load data add and, obtain the total thermic load and the electric load data of all heating users of cogeneration units institute load, and obtain the electric energy of described cogeneration units and the best effort point data of heat energy output according to described power consumption data and heat dissipation data computation, and regulate described cogeneration units operation according to described best operating point Data Control.
One of purpose of the present invention is, a kind of combined thermal power generation energy supply method is provided, and described method comprises: by cogeneration units output electric energy and heat energy; The electric energy of described cogeneration units generation is driven the heat pump generation heat energy of heating user side air-conditioner; The water or the steam of described cogeneration units heating are produced heat energy by the radiator that heat supply pipeline flows into the heating user side; Detect the power consumption data of the heat pump in the described air-conditioner; Detect the heat dissipation data of described radiator; Add power consumption data and heat dissipation data with described each heating thermic load user, obtain the total thermic load and the electric load data of all heating users of cogeneration units institute load, further calculate and obtain the electric energy of described cogeneration units and the best effort point data of heat energy output, and according to the described cogeneration units operation of described best operating point Data Control.
Beneficial effect of the present invention is, be divided into air-conditioning power consumption heating user and radiator heat dissipation heating user by heating user with steam power plant, with under the prerequisite that effectively guarantees winter heating user heating thermic load demand, dwindle steam power plant's winter, summer thermic load gap, improve steam power plant's operation overall efficiency, increase economic well-being of workers and staff.Air-conditioning power consumption heating user not only makes steam power plant's central heating thermic load minimizing in winter, can also reduce hot transmission loss.And owing to air-conditioning power consumption heating user's air-conditioning equipment electricity consumption can be measured separately, therefore air-conditioning power consumption heating user's heating power consumption can be charged separately, so that difference air-conditioning heating power consumption and other household electrical appliance power consumption make air-conditioning power consumption heating user's warming expense identical with the radiator heat dissipation heating user's of central heating warming expense.
Description of drawings
Fig. 1 is a structured flowchart of combined thermal power generation energy supply system;
Fig. 2 is another structured flowchart of combined thermal power generation energy supply system;
Fig. 3 is the structured flowchart of control device in the combined thermal power generation energy supply system;
Fig. 4 has to check meter and the structured flowchart of the combined thermal power generation energy supply system of billing function;
Fig. 5 is the flow chart of combined thermal power generation energy supply method;
Fig. 6 is system's connection diagram of combined thermal power generation energy supply system;
Fig. 7 is the structural representation of the combined thermal power generation energy supply system specific embodiment;
Fig. 8 is the structural representation of the control device specific embodiment in the combined thermal power generation energy supply system;
Fig. 9 is the structural representation of the combined thermal power generation energy supply system medium-long range meter copying device specific embodiment;
Figure 10 is common electricity consumption ammeter of the resident of the air-conditioning ammeter specific embodiment in the combined thermal power generation energy supply system and air-conditioning heating electricity consumption metering circuit schematic diagram.
The specific embodiment
Below in conjunction with description of drawings the specific embodiment of the present invention.The present invention proposes a kind of combined thermal power generation energy supply system, and this system is constructed as follows:
As shown in Figure 1, the combined thermal power generation energy supply system comprises: cogeneration units is used for output electric energy and heat energy; Air-conditioner is coupled by power line and cogeneration units, and is driven the heat pump generation heat energy of air-conditioner by the electric energy that cogeneration units produces; The air-conditioning ammeter is coupled with air-conditioner, is used for detecting the power consumption data of the heat pump of air-conditioner; Control device is used for obtaining the electric energy of cogeneration units and the best effort point data of heat energy output according to power consumption data and relevant heat energy data, and according to the described cogeneration units operation of best operating point Data Control.Relevant heat energy data can obtain according to the heat dissipation data that detect the radiator user, and with this heat energy data input or be stored in the control device, with as the basic data of obtaining the best effort point data.
As shown in Figure 2, the combined thermal power generation energy supply system comprises: cogeneration units is used for output electric energy and heat energy; Air-conditioner is coupled by power line and cogeneration units, and is driven the heat pump generation heat energy of air-conditioner by the electric energy that cogeneration units produces; Radiator is coupled by hot duct and cogeneration units, and produces heat energy by the water or the steam inflow radiator of cogeneration units heating; The air-conditioning ammeter is coupled with air-conditioner, is used for detecting the power consumption data of the heat pump of air-conditioner; The heat dissipation gauge table is coupled with radiator, is used to detect the heat dissipation data of radiator; Control device is used for obtaining the electric energy of cogeneration units and the best effort point data of heat energy output according to power consumption data and heat dissipation data, and moves according to best operating point Data Control cogeneration units.
As shown in Figure 3, the control device of combined thermal power generation energy supply system comprises: the data receiving element is used to receive power consumption data and heat dissipation data; Data storage cell is used for power consumption data and heat dissipation data are stored; Best operating point calculates acquiring unit, be used to add power consumption data and heat dissipation data with described each heating thermic load user, obtain the total thermic load and the electric load data of all heating users of cogeneration units institute load, and obtain the best effort point data according to the electric energy production and the calculating of the functional relation between the heat energy output of total power consumption data, heat dissipation data and cogeneration units; The best operating point operating instruction is controlled scheduling unit, is used for sending according to described best effort point data the operating instruction of cogeneration units.Trigger drive unit is used for the operating instruction of cogeneration units is converted into corresponding circuit execution signal, encourages corresponding circuit operation.The heating performance coefficient COP value of air-conditioner is more than or equal to 2.5.
As shown in Figure 4, the combined thermal power generation energy supply system also comprises: remote meter reading device and electricity fee metering device; The remote meter reading device is connected with the heat dissipation gauge table with the air-conditioning ammeter respectively, is used to receive and handle the power consumption data of the air-conditioning heat pump that the air-conditioning ammeter detects and the radiator heat dissipation data that the heat dissipation gauge table detects.The remote meter reading device is connected with control device, and the remote meter reading device sends the power consumption data of the air-conditioning heat pump of air-conditioning ammeter detection and the radiator heat dissipation data of heat dissipation gauge table detection to control device.Electricity fee metering device is used for the independent charging that power consumption data to the heat pump of air-conditioning are different from general lighting and household electrical appliances electricity consumption and handles.
As shown in Figure 5, the workflow of combined thermal power generation energy supply comprises: by cogeneration units output electric energy and heat energy S101; The electric energy of cogeneration units generation is driven the heat pump generation heat energy S102 of heating user side air-conditioner; The water or the steam of cogeneration units heating are produced heat energy S103 by the radiator that heat supply pipeline flows into the heating user side; Detect the power consumption data S104 of the heat pump in the air-conditioner; Detect the heat dissipation data S105 of radiator; Obtain the electric energy of cogeneration units and the best effort point data of heat energy output according to power consumption data and heat dissipation data, and according to best operating point Data Control cogeneration units operation S106; The independent charging treatment S 107 that the power consumption data of the heat pump in the air-conditioning is different from general lighting and household electrical appliances electricity consumption.
Embodiment 1
As shown in Figure 6, in the embodiment of combined thermal power generation energy supply system, cogeneration units is connected to air-conditioner n by power line supply network and air-conditioner 1, air-conditioner 1 is connected with air-conditioning ammeter 1 to air-conditioning ammeter n one to one to air-conditioner n, and air-conditioning ammeter 1 is connected with the remote meter reading device by power line to air-conditioning ammeter n.
Cogeneration units is connected to radiator n by pipeline heating network and radiator 1, radiator 1 is connected with heat dissipation gauge table 1 to heat dissipation gauge table n one to one to radiator n, and heat dissipation gauge table 1 is connected with the remote meter reading device by power line to heat dissipation gauge table n.
The remote meter reading device is connected with special air-conditioning ammeter electricity fee metering device with control device respectively by power line.
As shown in Figure 7, cogeneration units is become with the hot mechanism that is applicable to cogeneration of heat and power by generator, is used for output electric energy and heat energy.Wherein:
The electric energy that alternating current generator 104 sends sends air conditioner user to by transmission line of electricity 112, and air-conditioning heat pump 107 provides heat energy for air conditioner user under the driving of electric energy.Each air conditioner user end all is equipped with the special-purpose ammeter 108 of air-conditioning, and the special-purpose ammeter 108 of air-conditioning only is used to measure the electric energy that air-conditioning heat pump 107 is consumed.
The heating that heat exchangers for district heating 105 is produced sends warmer user's hot-water type high-efficiency radiator 110 with hot water to by heat distribution pipe network 113, and hot-water type high-efficiency radiator 110 provides heat energy for the warmer user under the driving of heat energy.Each warmer user side all is equipped with heating heat dissipation gauge table 111, and heating heat dissipation gauge table 111 is used for the metering heating heat consumption, and heating heat dissipation gauge table comprises: EN1434 electromagnetic type heat meter and EN834 electronic type Heat distribution meter etc.
Remote meter reading device 109 is connected with the special-purpose ammeter 108 of air-conditioning, heating heat dissipation gauge table 111 respectively, obtains the power consumption data of special-purpose ammeter 108 detections of air-conditioning and the heat energy data that heating heat dissipation gauge table 111 detects.Remote meter reading device 109 is encoded the power consumption data that special-purpose ammeter 108 meterings of air-conditioning obtain, and then the electric energy coded data is sent to the Computer Control Unit 106 of steam power plant's cogeneration units by transmission line of electricity 112.The remote meter reading device 109 heat energy data coding that heat dissipation gauge table 111 detects that will heat, and then the heat energy coded data is sent to the Computer Control Unit 106 of steam power plant's cogeneration units by transmission line of electricity 112.
106 pairs of co-generator groups of Computer Control Unit are controlled.
As shown in Figure 8, Computer Control Unit 106 comprises following equipment: data sink 201, electric energy coded data and heat energy coded data that receiving remote meter copying device 109 transmits.
Data decoder 202 is decoded the electric energy coded data and the heat energy coded data that receive, and the later data of will decoding then are stored in the data storage 203, and submits to central processing unit (CPU) 204 to handle.
Best operating point calculates acquiring unit in the central processing unit 204, each heating thermic load user's who is used to add and receives power consumption data and heat dissipation data, obtain the total thermic load and the electric load data of all heating users of cogeneration units institute load, and obtain described best effort point data according to the electric energy production and the calculating of heat energy relation of yield of total power consumption data, heat dissipation data and cogeneration units; The best operating point operating instruction is controlled scheduling unit, is used for sending according to described best effort point data the operating instruction of cogeneration units, carries out thermoelectric operating states of the units regulation and control.Can understand thermoelectric unit operation conditions in real time by human-computer interaction device 205 in addition, send the artificial regulatory instruction of thermoelectric unit by input equipments such as mouse and keyboards.Trigger drive unit is used for the operating instruction of cogeneration units is converted into corresponding circuit execution signal, encourages corresponding circuit operation.Thermoelectric unit regulate and control operation instruction is through the box-like protection buffer circuit 206 of optocoupler, drive circuit 207; trigger power electronics main circuit transmission device 208; control, the fuel feed amount of regulating cogeneration units and the amount of drawing gas of hot machine, thus the output of controlling thermoelectric unit electric energy, heat energy regulated.
According to standard GB-12021.3-2004, heating performance coefficient COP value 〉=2.5 of air-conditioning heat pump 107.Air-conditioning heat pump 107 provides heating heat energy by consumed power.The special-purpose ammeter 108 of air-conditioning is connected separately with air-conditioning heat pump 107 separately by lead, and the special-purpose ammeter 108 of air-conditioning comprises voltage, current transformer, data storage, data display equipment, is used for the power consumption that the independent First Astronautic Research Institute for Measurement and Test connects air-conditioning heat pump.
As shown in Figure 9, remote meter reading device 109 comprises: data encoder 301 (for example data processing chip ES16T), data collector 302, low voltage power line carrier communication device 303 (for example X10 technology---power carrier communication agreement), power transmission line 304.It may be noted that the present invention adopts the remote meter reading device realization data-transformation facility based on power line; Yet not merely limit to this, also can adopt other modes, for example GPRS wireless data transmission device and mode are perhaps based on the data transfer mode of Internet.
Transmission line of electricity 112 connects described generator and air-conditioning heat pump.Be transferred to the resident in order to the electric energy that steam power plant is produced.Transmission line of electricity 112 is also as a kind of communication media, and according to the communications protocol of setting, the coded data of heating heat, electricity being measured the result sends the Computer Control Unit 106 that is positioned at thermoelectric factory and office to.
Heat distribution pipe network 113, the hot water that heat exchangers for district heating 105 is produced are delivered in resident's the radiator and are made the heating purposes.The heat supply coolant-temperature gage is not less than 65 ℃.
The data storage 203 long-term accumulated storage datas of steam power plant's cogeneration units Computer Control Unit 106 are set up resident's heating load staqtistical data base, help new cogeneration of heat and power zone central heating planning to reduce summer in winter thermic load gap.The heating user is divided into air-conditioning power consumption heating user and hot-water type radiator heating user; Steam power plant's output electric energy and heat energy, being respectively above-mentioned two kinds of heating thermic load users provides and uses energy requirement.According to the summer fever load value, in conjunction with specified output electric energy of cogeneration units and heat energy, the thermoelectric unit of initial option.Again according to described air-conditioning power consumption heating user's the average COP value of air-conditioning heat pump, heat energy and electric energy output function relation in conjunction with the thermoelectric unit of primary election, determine the electric energy of each cogeneration units and the best operating point of heat energy output, the rated operation point of the thermoelectric unit of contrast primary election is selected that a kind of thermoelectric unit near its rated operation point.And for the control and regulation that move thermoelectric unit, utilize said method, the formation that one side can be regulated air-conditioning heat pump heating user and hot-water type radiator heating user, to reach best operating point, can regulate the operating condition of steam power plant's unit in addition on the one hand, obtain new best operating point, with the needs of coupling thermic load and electric load.Computational methods are expressed as follows with mathematical formulae:
(1)H＝f(E)；
(2)L
h＝COP×E+H
Determine the electric energy of described cogeneration units and the best operating point of heat energy output; Wherein,
E is the electric energy production of cogeneration units;
H is the heat energy output of cogeneration units;
L
HTotal heat duties amount for the heating thermic load user of steam power plant;
E
rBest operating point electric energy production for cogeneration units;
H
rBest operating point heat energy output for cogeneration units;
F (E
r) be that H=f (E) is at point (E
r, H
r) first derivative values located.
According to the electric energy of described cogeneration units and the best operating point of heat energy output, draw air-conditioning power consumption heating user and hot-water type radiator heating user's ratio.Finish steam power plant's cogeneration of heat and power planning.
Control program according to formula (1)-write (3) sends operating instruction automatically, carries out thermoelectric operating states of the units regulation and control.Can establish 205 by man-machine interaction in addition, understand thermoelectric unit operation conditions in real time, manually send the capable regulation and control instruction of the thermoelectric unit of fortune by input equipments such as mouse and keyboards.Thermoelectric unit regulate and control operation instruction process; the box-like protection buffer circuit 206 of optocoupler; drive circuit 207; trigger power electronics main circuit transmission device 208; control the method for operation of thermoelectric unit 101-105; regulate the fuel feed amount of cogeneration units and the amount of drawing gas, the pressure and temperature of hot machine, in order to regulate thermoelectric unit electric energy, heat production rate.Make described cogeneration units satisfy the demand that resident's heating load changes, operate near its best effort operating mode.
The principle that above-mentioned steam power plant's cogeneration of heat and power planning and control and regulation method no longer are confined to " electricity determining by heat ", but according to heating user's thermic load demand, in conjunction with the heating of driven by power air-conditioning heat pump, the programme of thermoelectric unit is proposed, effectively reduce steam power plant's winter, summer thermic load huge spread, improve the operational efficiency of steam power plant's winter, Xia Liangji respectively.And the define method of cogeneration of heat and power " the thermoelectric ratio of equivalence " is proposed:
In the formula, E
0And H
0Be respectively the actual power amount and the heating load of cogeneration of heat and power; Ea is the responsible warming by air conditioner user's of steam power plant a power consumption.
As shown in figure 10, according to the special-purpose ammeter 108 of air-conditioning, air-conditioning heating electricity consumption independent counting system is proposed.Steam power plant transfers out the electric energy of producing and sells to Utilities Electric Co. through power line 112, provide electric energy to air-conditioning power consumption heating user by Utilities Electric Co., and this part air-conditioning heating power consumption is measured separately.The special-purpose ammeter 108 of air-conditioning, be connected separately with air-conditioning heat pump 107 separately by lead, obtain air-conditioning heating electricity consumption data through the voltage and current transformer, be stored in the data storage, and can be by the air-conditioning heating power consumption of electronic type or mechanical type data display equipment inquiry accumulative total.Utilities Electric Co. collects the heating energy charge according to the air-conditioning heating power consumption of metering separately to the user.The unit electricity price rate of these heating electricity charge is distinguished and different mutually with ordinarily resident's electricity charge rate, and the computational methods of this heating unit's electricity price rate are as follows:
(5)R
e＝R
h×COP
0；
R wherein
hBe unit caloric value rate: unit/joule; R
eBe unit heating electricity price rate: unit/joule.COP
0Minimum air-conditioning heat pump performance coefficient for national Specification.
Embodiment 2
Steam power plant is according to the cogeneration of heat and power deliverability, and among regulation resident's heating in winter thermic load user, central heating user and electricity drive air-conditioning heating user's ratio.Part user does not add central heating, but adopts the air-conditioning heating of high COP value; Another part user then still selects to use the heating system of central heating.And be operated near the best operating point power by Computer Control Unit shown in Figure 7 106 control cogeneration units.
The cogeneration units output electric energy and the heat energy of steam power plant; According to the ability of steam power plant's output electric energy and heat energy, draw the heating thermic load user's of this steam power plant total heat duties amount; The heating thermic load user of steam power plant is divided into air-conditioning power consumption heating user and warmer heat dissipation heating user; Air-conditioning COP value according to air-conditioning power consumption heating user is determined the electric energy of described cogeneration units and the best operating point of heat energy output; According to the electric energy of cogeneration units and the best operating point of heat energy output, draw air-conditioning power consumption heating user and warmer heat dissipation heating user's ratio, cogeneration units is operated near the declared working condition.
With the heating of 500,000 square meter construction areas is example, and heating period amounts to 4 months from the March 15 November 15 to next year of the previous year.But not heat season from June to September, amount to 8 months.Heating planning at this zone has following two kinds of schemes to make comparisons.
Scheme one design is disposed 1 steam turbine TRT fully by the hot-water type radiator heating, and its heating parameter is (1MPa) 30t/hr, and corresponding generated output 6MW is thermoelectric than about 4.Can find between heating season and the non-heating season, the thermic load demand difference of maximum 30t/hr is arranged.
The cogeneration of heat and power heating method that scheme two design consideration the present invention propose dispose 1 steam turbine TRT, and its heating parameter be (1MPa) 12t/hr, generated output 10MW accordingly, and thermoelectricity is than being 1.Between heating season and the non-heating season, the thermic load demand difference of maximum 12t/hr is arranged, compare scheme one and dwindled the thermic load gap.When air-conditioning heat pump minimum COP=2.5, need provide the 3.8MW electric energy to drive air-conditioning heat pump heating heating at most, also remain the electrical power of 6.2MW.Can generating capacity be higher than scheme one, if use the air-conditioning heat pump heating of higher COP value, also can the more electric energy of surplus, reached purpose of energy saving.Equivalence is thermoelectric than being 3.4, satisfies national standard.The introducing of dynamical air-conditioning heat pump heating, the heating season and the non-heating season heating demand gap of having dwindled traditional hot-water type radiator heating system.Power consumption heating amount is counted the heat load of steam power plant, and " equivalence thermoelectric than " of cogeneration of heat and power reaches state-set standard fully, the annual high-efficiency operation that keeps of cogeneration of heat and power beginning, and steam power plant's energy-saving effect and economic benefit are all good.
Heating operation control for same thermoelectric unit, by heating heat dissipation gauge table 111 household metering heating heat consumptions, the special-purpose ammeter of the air-conditioning 108 independent First Astronautic Research Institute for Measurement and Test connect the power consumption of air-conditioning heat pump, heating energy consumption long-distance meter-reading system 109, by power line channel 112 coded data is sent to steam power plant's cogeneration units computer control system 106, control to adjust the method for operation of thermoelectric unit 101-105, adjust heating load and delivery, to realize the purpose of energy-efficient operation.
Embodiment 3
Generated output and heating power must satisfy certain functional relation, according to conservation of energy principle, when the input energy is identical, increase generated energy, will reduce heating load.And the heating gross heat input, can by heat pump heating and central heating add and and obtain.Relation as shown in the formula the total heating amount Lh of expression and its dependent variable:
L
h＝COP×E+H
The winter heating demand load of one sub-district is satisfied by certain type cogeneration units, and the functional relation between this unit output power, the heating power is as follows, unit, megawatt (MW).
H＝-0.25×E
2-1.5×E+8
Get COP=2.5, then:
-f′(E
r)＝-(-0.5×E
r-1.5)＝COP＝2.5
Try to achieve E
r=2
H
r＝-0.25×2
2-1.5×2+8＝4
This unit heating amount always L then
H, max=2.5 * 2+4=9
As generated output E
r＞2, perhaps E
r＜2MW, total heating amount is all less than 9MW.Then the maximum heating capacity of this cogeneration units is 9MW.
When this type cogeneration units operating condition changed, the functional relation between this unit output power, the heating power was changed to and is shown below, unit, megawatt (MW).
H＝-0.3×E
2-E+6
Still get COP=2.5, then:
-f′(E
r)＝-(-0.6×E
r-1)＝COP＝2.5
Try to achieve E
r=2.5
H
r＝-0.3×2.5
2-2.5+6＝2.625
This unit heating amount always L then
H, max=2.5 * 2.5+1.625=7.875
As generated output E
r＞2.5MW, perhaps E
r＜2.5MW, total heating amount is all less than 7.875MW.Then the maximum heating capacity of this cogeneration units is 7.875MW.
By the calculated examples of above-mentioned two kinds of cogeneration of heat and power operating conditions as can be seen, use the method for operation that this method planning control is regulated cogeneration units, make cogeneration units be operated in best operating point, can obtain maximum efficiency of energy utilization.
Additional advantages of the present invention show as, and the household metering of central heating at present exists technology and fund two large problems.Though the household metering table of development entered for the 5th generation now, but the accuracy gap is still very big, and will accomplish that Every household has an ammeter valve heating and metering, need to lay again in doors hot pipe network, about 65 yuan～80 yuan/m2 of improvement expenses (by price mark in 2004), according to relevant regulations, these expenses will be born by the user.The about 200 yuan/family of expenditure of construction of the existing independent metering system of air-conditioning is far below the investment of central heating household metering system.And the independent metering and the charging of air-conditioning heating electricity consumption make that also air-conditioning heating cost is consistent with the hot-water type radiator heating.So air conditioning electricity heating independent counting system can reduce the construction cost of heating facility, reduce the use cost of air-conditioning heating, reduce resident's financial burden, improve the utilization rate of air-conditioning.
Because dwindled heating load difference distance, reduced investment, the maintenance cost of heat absorption formula refrigeration machine.And adopt air conditioning electricity heating, and needn't lay heat supply pipeline, reduced construction, the maintenance cost of heating network.Because the adding of air-conditioning heating, distribution dilatation cost can make some not exist central heating area distribution load in winter to increase, but consider the existence of electricity consumption in summer peak value, so can be ignored, so do not have power supply cost to increase, but also increased the electrical network utilization rate.
The above specific embodiment only is used to illustrate the present invention, but not is used to limit the present invention.
Claims (13)
1. a combined thermal power generation energy supply system is characterized in that, described system comprises:
Cogeneration units is used for output electric energy and heat energy;
Air-conditioner is coupled by power line and described cogeneration units, and is driven the heat pump generation heat energy of described air-conditioner by the electric energy that described cogeneration units produces;
The air-conditioning ammeter is coupled with described air-conditioner, is specifically designed to the power consumption data that detect the heat pump in the described air-conditioner of metering;
Control device is used for obtaining the electric energy of described cogeneration units and the best effort point data of heat energy output according to described power consumption data and relevant heat energy data, and according to the described cogeneration units operation of described best operating point Data Control.
2. system according to claim 1 is characterized in that, described system also comprises:
Radiator is coupled by hot duct and described cogeneration units, and flows into described radiator generation heat energy by the water or the steam of described cogeneration units heating;
The heat dissipation gauge table is coupled with described radiator, is used to detect the heat dissipation data of described radiator;
Described control device obtains the electric energy of described cogeneration units and the best effort point data of heat energy output according to described power consumption data and heat dissipation data, and according to the described cogeneration units operation of described best operating point Data Control.
3. system according to claim 1 and 2 is characterized in that, described control device comprises:
The data receiving element is used to receive described power consumption data and heat dissipation data;
Data storage cell is used for described power consumption data and heat dissipation data are stored;
Best operating point calculates acquiring unit, is used for obtaining described best effort point data according to the electric energy production and the heat energy relation of yield of described power consumption data, heat dissipation data and cogeneration units;
Control scheduling unit, be used for sending the operating instruction of cogeneration units according to described best effort point data;
Trigger drive unit is used for the operating instruction of cogeneration units is converted into corresponding circuit execution signal, encourages corresponding circuit operation.
4. system according to claim 1 is characterized in that, the heating performance coefficient COP value of described air-conditioner is more than or equal to 2.5.
5. system according to claim 2 is characterized in that, described system also comprises: the remote meter reading device;
Described remote meter reading device is connected with the heat dissipation gauge table with described air-conditioning ammeter respectively, is used to receive and handle the power consumption data of the air-conditioning heat pump that described air-conditioning ammeter detects and the radiator heat dissipation data that the heat dissipation gauge table detects.
6. system according to claim 5, it is characterized in that, described remote meter reading device is connected with described control device, and described remote meter reading device sends the power consumption data of the air-conditioning heat pump of described air-conditioning ammeter detection and the radiator heat dissipation data of heat dissipation gauge table detection to described control device.
7. system according to claim 1 or 5 is characterized in that described system also comprises: electricity fee metering device is used for the processing of chargeing of the power consumption data of the heat pump of described air-conditioning.
8. a combined thermal power generation energy supply method is characterized in that, described method comprises:
By cogeneration units output electric energy and heat energy;
The electric energy of described cogeneration units generation is driven the heat pump generation heat energy of heating user side air-conditioner;
Detect the power consumption data of the heat pump in the described air-conditioner;
Obtain the electric energy of described cogeneration units and the best effort point data of heat energy output according to described power consumption data and associated thermal energy data, and according to the described cogeneration units operation of described best operating point Data Control.
9. method according to claim 8 is characterized in that, described method also comprises:
The water or the steam of described cogeneration units heating are produced heat energy by the radiator that heat supply pipeline flows into the heating user side; Detect the heat dissipation data of described radiator; Obtain the electric energy of described cogeneration units and the best effort point data of heat energy output according to described power consumption data and heat dissipation data, and according to the described cogeneration units operation of described best operating point Data Control.
10. method according to claim 8 is characterized in that, obtains the electric energy of described cogeneration units and the best operating point data of heat energy output and comprises following formula:
(1)H＝f(E)；
(2)L
h＝COP×E+H；
Wherein,
E is the electric energy production of cogeneration units;
H is the heat energy output of cogeneration units;
L
HTotal heat duties amount for the heating thermic load user of steam power plant;
E
rBest operating point electric energy production for cogeneration units;
H
rBest operating point heat energy output for cogeneration units;
F (E
r) be that H=f (E) is at point (E
r, H
r) first derivative values located.
11. method according to claim 8 is characterized in that, the power consumption data of the air-conditioning heat pump that described air-conditioning ammeter is detected and the radiator heat dissipation data that the heat dissipation gauge table detects are carried out remote meter reading;
And to the processing of chargeing separately of the power consumption data of the heat pump in the described air-conditioner.
12. method according to claim 11 is characterized in that, to the power consumption data of the heat pump in the described air-conditioner computing formula of handling of chargeing separately is:
(4)R
e＝R
h×COP
0
R wherein
hBe unit caloric value, R
eBe the unit electricity price; E is the electric energy production of cogeneration units; H is the heat energy output of cogeneration units.
13. method according to claim 8 is characterized in that, the cogeneration of heat and power equivalence is thermoelectric to be obtained by following formula than Ratio:
In the formula, E
0And H
0Be respectively the actual power amount and the heating load of cogeneration of heat and power; Ea is the responsible warming by air conditioner user's of steam power plant a power consumption.
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