CN104123446B - Design method of distributed combined cooling heating and power (CCHP) system - Google Patents
Design method of distributed combined cooling heating and power (CCHP) system Download PDFInfo
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- CN104123446B CN104123446B CN201410334582.7A CN201410334582A CN104123446B CN 104123446 B CN104123446 B CN 104123446B CN 201410334582 A CN201410334582 A CN 201410334582A CN 104123446 B CN104123446 B CN 104123446B
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- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Abstract
The invention discloses a design method of a distributed combined cooling heating and power (CCHP) system. The design method of the distributed CCHP system is characterized in that starting equipment and the model of one certain technological process of the distributed CCHP system are selected according to actual needs, and the atmospheric condition at the typical time point when the CCHP system is placed is used for conducting variable working condition correcting; the input/output relation between the equipment is used for conducting equipment connection selecting, meanwhile, the parameter loss of working media in pipeline transmission between the equipment are considered, equipment input working media are used for limiting selecting of equipment models, and variable working condition correcting is conducted on the equipment until the technological process scheme is achieved; a plurality of technological process schemes are combined to form a system scheme, and calculation of operation state and energy supply capacity of the equipment under scheme variable working conditions of the CCHP system is achieved. According to the design method, a plurality of distributed CCHP systems can be flexibly designed, and operation out-of-limit under equipment variable working conditions due to the fact that models are selected according to equipment nominal parameters.
Description
Technical field
The invention belongs to distributed triple-generation system field, more particularly, to a kind of distributed triple-generation system
Method for designing.
Background technology
With the continuous decline of world energy sources reserves, people increasingly pay attention to energy problem.Distributed cold and heat CCHP system
System, as the energy supplying system that energy utilization rate is high, environmental pollution is little, receives more and more attention.
The energy crisis of 20 century 70s result in the development of distributing-supplying-energy system.In general, distributed cold and heat
Chp system refers to that one kind is distributed near load source in decentralized manner, and the small-scale that can independently export electric, hot and cold energy supplies
Can system.It can will be effectively unified for electric, hot, cold 3 kinds of energy requirements, realize energy cascade utilization, improve comprehensive utilization of energy
Rate.Currently, distributed energy supply is greatly developed abroad.Although China's distributed energy supply is started late, also
It has been set up distributed triple-generation system engineering, distributed cold and heat CCHP will be developed rapidly in China.
Although there is now the design of multiple distributed triple-generation system, lack one kind with internal combustion
Machine or the method for designing of distributed triple-generation system that gas turbine is main generating equipment.And, with internal combustion engine or
Gas turbine is in the cold-hot combined supply system of main generating equipment, and the operation due to internal combustion engine or gas turbine is subject to atmospheric condition shadow
Sound is fairly obvious, and they are easy to deviate declared working condition operation under different atmospheric conditions, there is also between equipment connecting pipe
Fluid properties are lost, thus causing the variable parameter operation of whole distributed triple-generation system.So, in specific atmospheric condition
Under, only lectotype selection is carried out according to equipment output rated value during design distributed cold and heat CCHP scheme and be possible in equipment reality
Equipment operational factor out-of-limit situation occurs during operation.Although at present to distributed triple-generation system common equipment
Variable condition calculation research, but, but lack a kind of general variable condition calculation method to distributed triple-generation system.
Content of the invention
It is an object of the invention to, considering the distributed cold and heat electricity being main generating equipment with internal combustion engine or gas turbine
On the premise of atmospheric condition residing for co-feeding system, a kind of distributed cold and heat that is flexible, meeting equipment actual motion requirement is proposed
Chp system method for designing, completes the variable condition calculation to designed distributed triple-generation system simultaneously, is respectively set
Standby running status and system power capability.
The technical scheme is that a kind of method for designing of distributed triple-generation system comprises the following steps：
Step 1：Design gas turbine or internal combustion engine are initial as a certain technological process of distributed triple-generation system
Equipment, and select initial plant model according to the actual requirements, as the higher level equipment of its subordinate equipment.
Step 2：The temperature of n typical time period point of selection distributed triple-generation system institute applied environment, humidity, pressure
Force parameter, the generated output to internal combustion engine or gas turbine and output working medium are modified, and obtain gas turbine or internal combustion engine disappears
Consumption fuel flow rate, generated output, the output corresponding variable working condition value of fluid properties n.
Step 3：The working medium that higher level equipment delivery outlet produces, except can be used for the partly outer of heat supply, through correspondence working medium pipeline
It is conveyed to subordinate equipment.Annexation according to equipment room subordinate equipment to be connect with each equipment output port sets up corresponding number
Working medium pipeline be connected with higher level equipment delivery outlet, the working medium pipeline other end is connected with subordinate equipment input port.
Step 4：Calculate the working medium pipeline n corresponding with subordinate equipment joint setting up in step 3 under n typical time period point
Group fluid properties, i.e. the inputted fluid properties in subordinate equipment input port.
Step 5：Using model existing for subordinate equipment and corresponding constraint, carry out subordinate equipment model selection.It is suitable to select
Unit type, is adjusted each delivery outlet and is delivered to the working medium of subordinate equipment in the working medium being connected in working medium transmission pipeline with this delivery outlet
Allocation proportion, makes selected unit type can normally must run under n group input fluid properties, if there is not suitable subordinate
Unit type, need to re-start technical flow design.If being not required to re-start technical flow design, set for each subordinate
Standby, the n group fluid properties according to the input of its input port are carried out to this equipment output port equipment fluid properties and other output parameter
Revise, obtain n group correction value.
Step 6：Judge whether technical flow design terminates according to subordinate equipment.If design terminates, execution step 7, otherwise,
Using there is the subordinate equipment that must connect subordinate equipment delivery outlet as new higher level equipment, repeat step 3 arrives step 6.
Step 7：Repeat step 1 arrives step 6, can set up a plurality of technological process.The technological process set up is combined, is formed
Distributed triple-generation system design.
Step 8：The generated output of calculating distributed triple-generation system, heating power, refrigeration work consumption, obtain alliance system
The power capability of system, obtains each equipment running status under variable working condition simultaneously.
A kind of method for designing of the distributed triple-generation system according to such scheme, in described step 4, working medium flue gas
Consider temperature, Flux Loss, working medium superheated steam considers temperature, pressure, Flux Loss, working medium saturated vapor considers pressure, stream
Amount loss, hot water considers temperature, Flux Loss.
A kind of method for designing of the distributed triple-generation system according to such scheme, in described step 6, judges technique
The foundation that flow scheme design terminates is：There is not delivery outlet in all subordinate equipments in described 5 or presence can not connect subordinate equipment
Delivery outlet, and be not prepared as this delivery outlet design subordinate equipment, then this technical flow design terminates.
A kind of method for designing of the distributed triple-generation system according to such scheme, in described step 7, repeat step
The number of times of 1 to step 6 is less by 1 than the bar number of technological process in distributed triple-generation system.
A kind of method for designing of the distributed triple-generation system according to such scheme, will be all in co-feeding system scheme
The generated output of equipment is added, and just obtains the generated output of co-feeding system, tries to achieve heating power and the refrigeration work(of co-feeding system in the same manner
Rate, in distributed triple-generation system scheme, each equipment variable parameter operation parameter is obtained by correction result in step 5.
A kind of method for designing of distributed triple-generation system proposed by the invention, its advantage is：Convenient spirit
Live, and consider the impact to equipment for the atmospheric condition, complete the type selecting to equipment and variable working condition correction in the design process, it is to avoid
The equipment actual operation parameters causing according to equipment type selection are out-of-limit, complete to set meter systems variable working condition simultaneously
Lower equipment running status and the calculating of Functional Capability.
Brief description
Fig. 1 is the flow chart of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is elaborated.It is emphasized that what the description below was merely exemplary,
Rather than in order to limit the scope of the present invention and its application.
Fig. 1 gives the whole implementation flow process of the inventive method, comprises the following steps that：
Step 1：Design gas turbine or internal combustion engine are initial as a certain technological process of distributed triple-generation system
Equipment, and select initial plant model according to the actual requirements, as the higher level equipment of its subordinate equipment.Need according to alliance system
The required power capability of system, the number of units of gas turbine or internal combustion engine and model needed for estimation determination.
Step 2：The temperature of n typical time period point of selection distributed triple-generation system institute applied environment, humidity, pressure
Force parameter, the generated output to internal combustion engine or gas turbine and output working medium are modified, and obtain gas turbine or internal combustion engine disappears
Consumption fuel flow rate, generated output, the output corresponding variable working condition value of fluid properties n.
Step 3：The working medium that higher level equipment delivery outlet produces, except can be used for the partly outer of heat supply, through correspondence working medium pipeline
It is conveyed to subordinate equipment.Annexation according to equipment room subordinate equipment to be connect with each equipment output port sets up corresponding number
Working medium pipeline be connected with higher level equipment delivery outlet, the working medium pipeline other end is connected with subordinate equipment input port.
The equipment that the distributed triple-generation system being main generating equipment with internal combustion engine or gas turbine mainly comprises
And corresponding relation is as shown in table 1.
Table 1 distributed triple-generation system each equipment corresponding relation
When can not connect the delivery outlet of subordinate equipment in table 1 and not connecing subordinate equipment, its output working medium is all for heat supply.Separately
Outward, working medium flue gas is delivered to subordinate equipment by flue gas transmission pipeline, and working medium superheated steam is passed by superheated steam transmission pipeline
It is delivered to subordinate equipment, working medium saturated vapor is delivered to subordinate equipment by saturated vapor transmission pipeline, working medium hot water passes through hot water
Transmission pipeline is delivered to subordinate equipment.If it is overheated that steam type lithium bromide refrigerator is connected grade working medium of equipment output port output
Steam, then superheated steam must be converted into saturated vapor and enter back in steam type lithium bromide refrigerator, reforming unit is calculated in the calculation
Do a part for steam type lithium bromide refrigerator meter variable working condition correction model.
The working medium that can be used for heat supply is hot water and steam (including saturated vapor and superheated steam).In general, in one
Combustion engine or the connect subordinate equipment of gas turbine flue gas delivery outlet are waste heat boiler, then this delivery outlet can only be connected with an equipment,
One is produced the connect subordinate equipment of superheated steam waste heat boiler is steam turbine, then this delivery outlet can only be connected with an equipment, and
The produced steam of this waste heat boiler is not used to direct heating.
Step 4：Calculate the working medium pipeline n corresponding with subordinate equipment joint setting up in step 3 under n typical time period point
Group fluid properties, i.e. the inputted fluid properties in subordinate equipment input port.
Working medium flue gas considers temperature, Flux Loss, and working medium superheated steam considers temperature, pressure, Flux Loss, working medium saturation
Steam considers pressure, Flux Loss, and hot water considers temperature, Flux Loss.Specifically it is calculated as follows：
(1) flue gas transmission pipeline
Gg2=kg% (1-kgg%) Gg1(1)
Tg2=(1-kgt%) Tg1(2)
Gg2For flue gas transmission pipeline end flue gas flow, that is, in this step subordinate equipment input flue gas flow, kgFor work
Matter distribution percentage ratio (%), that is, the flue gas flow being assigned in this pipeline accounts for higher level equipment delivery outlet and is transferred to all subordinate equipments
The percentage ratio of flue gas total flow, kggFor flow loss percentage ratio (%), Gg1Connected higher level equipment by flue gas transmission pipeline head end defeated
Exiting flue gas flow, Tg2For flue gas transmission pipeline end flue-gas temperature, that is, in this step subordinate equipment input flue-gas temperature,
kgtFor temperature loss percentage ratio (%), Tg1Connected a grade equipment output port flue-gas temperature by flue gas transmission pipeline head end.
(2) superheated steam transmission pipeline
Gs12=ks1% (1-ks1g%) Gs11(3)
Ts12=(1-ks1t%) Ts11(4)
Ps12=(1-ks1p%) Ps11(5)
Gs12For superheated steam transmission pipeline end superheat steam flow, the i.e. overheated steaming of the input of subordinate equipment in this step
Steam flow amount, ks1Distribute percentage ratio (%) for working medium, that is, the superheat steam flow being assigned in this pipeline accounts for higher level equipment delivery outlet
Except the percentage ratio of heat supply external superheat steam flow, ks1gFor flow loss percentage ratio (%), Gs11First for superheated steam transmission pipeline
End is connected a grade equipment output port superheat steam flow, Ts12For superheated steam transmission pipeline end superheat steam temperature, i.e. this step
Suddenly the input superheat steam temperature of middle subordinate equipment, ks1tFor temperature loss percentage ratio (%), Ts11For superheated steam transmission pipeline
Head end is connected a grade equipment output port superheat steam temperature, Ps12For superheated steam transmission pipeline end superheated steam pressure, i.e. basis
The input superheated steam pressure of subordinate equipment, k in steps1pFor pressure loss percentage ratio (%), Ps11For superheated steam transfer tube
Road head end is connected a grade equipment output port superheated steam pressure.
(3) saturated vapor transmission pipeline
Gs22=ks2% (1-ks2g%) Gs21(6)
Ps22=(1-ks2p%) Ps21(7)
Gs22For saturated vapor transmission pipeline end saturated vapor flow, that is, in this step, the input saturation of subordinate equipment is steamed
Steam flow amount, ks2Distribute percentage ratio (%) for working medium, that is, the saturated vapor flow being assigned in this pipeline accounts for higher level equipment delivery outlet
The percentage ratio of saturated vapor flow, k in addition to heat supplys2gFor flow loss percentage ratio (%), Gs21First for saturated vapor transmission pipeline
End is connected a grade equipment output port saturated vapor flow, Ps22For saturated vapor transmission pipeline end saturated vapor pressure, i.e. this step
Suddenly the input saturated vapor pressure of middle subordinate equipment, ks2pFor pressure loss percentage ratio (%), Ps21For saturated vapor transmission pipeline
Head end is connected a grade equipment output port saturated vapor pressure.
(4) hot water transport pipes
Gw2=kw% (1-kwg%) Gw1(8)
Tw2=(1-kwt%) Tw1(9)
Gw2For hot water transport pipes end hot water flow, it is the input hot water flow of subordinate equipment in this step, kwFor
Working medium distribution percentage ratio (%), that is, the hot water flow being assigned in this pipeline accounts for higher level equipment delivery outlet hot water flow in addition to heat supply
Percentage ratio, kwgFor flow loss percentage ratio (%), Gw1Connected a grade equipment output port hot water stream by hot water transport pipes' head end
Amount, Tw2For hot water transport pipes end hot water temperature, that is, in this step subordinate equipment input hot water temperature, kwtDamage for temperature
Lose percentage ratio (%), Tw1Connected a grade equipment output port hot water temperature by hot water transport pipes' head end.
Step 5：Using model existing for subordinate equipment and corresponding constraint, carry out subordinate equipment model selection.It is suitable to select
Unit type, is adjusted each delivery outlet and is delivered to the working medium of subordinate equipment in the working medium being connected in working medium transmission pipeline with this delivery outlet
Allocation proportion, makes selected unit type can normally must run under n group input fluid properties, if there is not suitable subordinate
Unit type, need to re-start technical flow design.If being not required to re-start technical flow design, set for each subordinate
Standby, the n group fluid properties according to the input of its input port are carried out to this equipment output port equipment fluid properties and other output parameter
Revise, obtain n group correction value.
Each unit type restriction on the parameters considers as follows：
(1) Primary regulation extraction turbine
|Gst10-Gst10N|≤kst1g%Gst10N(10)
|Tst10-Tst10N|≤kst1t%Tst10N(11)
|Pst10-Pst10N|≤kst1p%Pst10N(12)
Gst10For the variable working condition steam flow of steam extraction turbine input next time, Tst10Adjust for variable working condition next time
Extraction turbine inputs vapor (steam) temperature, Pst10For the variable working condition steam pressure of steam extraction turbine input next time, Gst10N
For Primary regulation extraction turbine specified input steam flow, Tst10NFor Primary regulation extraction turbine specified input steam
Temperature, Pst10NFor Primary regulation extraction turbine specified input steam pressure, kst1gFor Primary regulation extraction turbine vapour
Turbine input working medium flow limit coefficient (%), kst1tPrimary regulation extraction turbine inputs Temperature of Working limit coefficient
(%), kst1pFor Primary regulation extraction turbine input sender matter pressure limit coefficient (%).
Gst11≤Gst10-kst1d%Gst10N(13)
Gst11Set extraction flow, G for Primary regulation extraction turbine extraction openingst10Adjust for variable working condition next time and take out
Vapour formula steam turbine inputs steam flow, Gst10NFor Primary regulation extraction turbine specified input steam flow, kst1dFor flowing through
Low pressure (LP) cylinder minimum steam flow restriction coefficient (%).
(2) Secondary Control extraction turbine
|Gst20-Gst20N|≤kst2g%Gst20N(14)
|Tst20-Tst20N|≤kst2t%Tst20N(15)
|Pst20-Pst20N|≤kst2p%Pst20N(16)
Gst20For Secondary Control extraction turbine input steam flow, T under variable working conditionst20For Secondary Control under variable working condition
Extraction turbine inputs vapor (steam) temperature, Pst20For Secondary Control extraction turbine input steam pressure, G under variable working conditionst20N
Input steam flow, T for Secondary Control extraction turbinest20NFor Secondary Control extraction turbine specified input steam temperature
Degree, Pst20NFor Secondary Control extraction turbine specified input steam pressure, kst2gFor Secondary Control extraction turbine steamer
Machine input working medium flow limit coefficient (%), kst2tInput Temperature of Working limit coefficient for Secondary Control extraction turbine
(%), kst2pFor Secondary Control extraction turbine input sender matter pressure limit coefficient (%).
Gst21+Gst22≤Gst20-kstd2%Gst20N(17)
Gst21Set extraction flow, G for Secondary Control extraction turbine first order extraction openingst22Draw gas for Secondary Control
Formula steam turbine second level extraction opening sets extraction flow, Gst20For Secondary Control extraction turbine input steam stream under variable working condition
Amount, Gst20NFor Secondary Control extraction turbine specified input steam flow, kst2dFor flowing through low pressure (LP) cylinder minimum steam Flow Limit
Coefficient (%) processed.
(3) extraction back pressure turbine
|Gstb0-Gstb0N|≤kstbg%Gstb0N(18)
|Tstb0-Tstb0N|≤kstbt%Tstb0N(19)
|Pstb0-Pstb0N|≤kstbp%Pstb0N(20)
Gstb0For extraction back pressure turbine input steam flow, T under variable working conditionstb0For back pressure extraction vapour under variable working condition
Turbine inputs vapor (steam) temperature, Pstb0For extraction back pressure turbine input steam pressure, G under variable working conditionstb0NFor back pressure extraction
Steam turbine specified input steam flow, Tstb0NFor extraction back pressure turbine specified input vapor (steam) temperature, Pstb0NFor back pressure of drawing gas
Formula steam turbine specified input steam pressure, kstbgInput working medium flow limit coefficient for back pressure extraction formula Turbine Steam turbine
(%), kstbtFor extraction back pressure turbine input Temperature of Working limit coefficient (%), kstbpFor extraction back pressure turbine input
Sender matter pressure limit coefficient (%).
Gstb1≤Gstb0-kstbd%Gstb0N(21)
Gstb1Set extraction flow, G for extraction back pressure turbine extraction openingstb0For back pressure extraction steamer under variable working condition
Machine inputs steam flow, Gstb0NFor extraction back pressure turbine specified input steam flow, kstbdIn order to flow through, low pressure (LP) cylinder is minimum to be steamed
Steam flow amount limit coefficient (%).
(4) produce superheated steam waste heat boiler
|Ghr1g-Ghr1gN|≤khr1g%Ghr1gN(22)
|Thr1g-Thr1gN|≤khr1t%Thr1gN(23)
Ghr1s≥khr1d%Ghr1sN(24)
Ghr1gFor producing superheated steam waste heat boiler input flue gas flow, T under variable working conditionhr1gFor producing superheated steam under variable working condition
Waste heat boiler inputs flue-gas temperature, Ghr1sFor producing superheated steam waste heat boiler output steam flow, G under variable working conditionhr1gNFor producing
Vapourss waste heat boiler specified input flue gas flow, Thr1gNFor producing superheated steam waste heat boiler specified input flue-gas temperature, Ghr1sN
For producing superheated steam waste heat boiler rated output steam flow, khr1gLimit for producing superheated steam waste heat boiler input working medium flow
Coefficient (%), khr1tFor producing superheated steam waste heat boiler input Temperature of Working limit coefficient (%), khr2dFor preventing from producing superheated steam
Waste heat boiler dry combustion method coefficient (%).
(5) produce saturated vapor waste heat boiler
|Ghr2g-Ghr2gN|≤khr2g%Ghr2gN(25)
|Thr2g-Thr2gN|≤khr2t%Thr2gN(26)
Ghr2s≥khr2d%Ghr2sN(27)
Ghr2gFor producing saturated vapor waste heat boiler input flue gas flow, T under variable working conditionhr2gFor producing saturated vapor under variable working condition
Waste heat boiler inputs flue-gas temperature, Ghr2sFor producing saturated vapor waste heat boiler output steam flow, G under variable working conditionhr2gNFull for producing
With boiler using steam residual-heat specified input flue gas flow, Thr2gNFor producing saturated vapor waste heat boiler specified input flue-gas temperature, Ghr2sN
For producing saturated vapor waste heat boiler rated output steam flow, khr2gLimit for producing saturated vapor waste heat boiler input working medium flow
Coefficient (%), khr2tFor producing saturated vapor waste heat boiler input Temperature of Working limit coefficient (%), khr2dFor preventing from producing saturated vapor
Waste heat boiler dry combustion method coefficient (%).
(6) flue gas type lithium bromide refrigerator
|Gac1g-Gac1gN|≤kac1g%Gac1gN(28)
|Tac1g-Tac1gN|≤kac1t%Tac1gN(29)
Gac1gFor flue gas type lithium bromide refrigerator input flue gas flow, T under variable working conditionac1gFor flue gas type bromination under variable working condition
Lithium refrigeration machine inputs flue-gas temperature, Gac1gNFor the specified input flue gas flow of flue gas type lithium bromide refrigerator, Tac1gNFor flue gas type bromine
Change lithium refrigeration machine specified input flue-gas temperature, kac1gInput working medium flow limit coefficient (%) for flue gas type lithium bromide refrigerator,
kac1tFor flue gas type lithium bromide refrigerator input Temperature of Working limit coefficient (%).
(7) steam type lithium bromide refrigerator
|Gac2s-Gac2sN|≤kac2g%Gac2sN(30)
|Pac2s-Pac2sN|≤kac2p%Pac2sN(31)
Gac2sFor steam type lithium bromide refrigerator input flue gas flow, T under variable working conditionac2sFor steam type bromination under variable working condition
Lithium refrigeration machine inputs flue-gas temperature, Gac2sNFor steam type lithium bromide refrigerator specified input flue gas flow, Tac2sNFor steam type bromine
Change lithium refrigeration machine specified input flue-gas temperature, kac2sInput working medium flow limit coefficient (%) for steam type lithium bromide refrigerator,
kac2sFor steam type lithium bromide refrigerator input Temperature of Working limit coefficient (%).
(8) hot water lithium bromide refrigeration machine
|Gac3w-Gac3wN|≤kac3g%Gac3wN(32)
|Tac3w-Tac3wN|≤kac3t%Tac3wN(33)
Gac3wFor hot water lithium bromide refrigeration machine input flue gas flow, T under variable working conditionac3wFor hot-water type bromination under variable working condition
Lithium refrigeration machine inputs flue-gas temperature, Gac3wNFor hot water lithium bromide refrigeration machine specified input flue gas flow, Tac3wNFor hot-water type bromine
Change lithium refrigeration machine specified input flue-gas temperature, kac3wInput working medium flow limit coefficient (%) for hot water lithium bromide refrigeration machine,
kac3wFor hot water lithium bromide refrigeration machine input Temperature of Working limit coefficient (%).
Step 6：Judge whether technical flow design terminates according to subordinate equipment.If design terminates, execution step 7, otherwise,
Using there is the higher level equipment that must connect the subordinate equipment of subordinate equipment delivery outlet as its subordinate equipment, repeat step 3 arrives step
6.
Judge that the foundation that technical flow design terminates is：All subordinate equipments described in step 5 do not exist delivery outlet or
Presence can not connect the delivery outlet of subordinate equipment, and is not prepared as this delivery outlet design subordinate equipment, then this technical flow design knot
Bundle.
Step 7：Repeat step 1 arrives step 6, can set up a plurality of technological process.The technological process set up is combined, is formed
Distributed triple-generation system design.
The number of times of repeat step 1 to step 6 is less by 1 than the bar number of technological process in distributed triple-generation system.Typically
For, the technological process that alliance scheme is comprised is 1 group or 2 groups of identical, and every group comprises 2 technological processes, in every group
Technological process in addition to refrigeration machine number, other identical.
Step 8：The generated output of calculating distributed triple-generation system, heating power, refrigeration work consumption, obtain alliance system
The power capability of system, obtains each equipment running status under variable working condition simultaneously.
Heating power then calculates by the following method.
If hot water heating, then heating power is
Qwh=Gwhfh(Twh,Pwh) (34)
QwhFor hot water heating power, GwhFor hot water heating flow, fh(Twh,Pwh) for hot water than enthalpy, it is by hot water temperature
Twh, hot water pressure PwhCalculate function using water and steam physical property to try to achieve, hot water temperature Twh, hot water pressure PwhBy step 5
In correction result obtain.
If superheated steam heat supply, then heating power is
Qs1h=Gs1hfh(Ts1h,Ps1h) (35)
Qs1hFor superheated steam heating power, Gs1hFor superheated steam confession heat flow, fh(Ts1h,Ps1h) it is superheated steam specific enthalpy
Value, by superheat steam temperature Ts1h, superheated steam pressure Ps1hCalculate function using water and steam physical property to try to achieve, overheated steaming
Stripping temperature Ts1h, superheated steam pressure Ps1hObtained by the correction result in step 5.
If saturated vapor heat supply, then heating power is
Qs2h=Gs2hfh(Ps2h) (36)
Qs2hFor saturated vapor heating power, Gs2hFor saturated vapor confession heat flow, fh(Ps2h) for saturated vapor than enthalpy,
It is by saturated vapor pressure Ps2hCalculate function using water and steam physical property to try to achieve, saturated vapor pressure Ps2hBy step 5
In correction result obtain.
The generated output of equipment and refrigeration work consumption can be directly obtained by the correction result in step 5.
The generated output of all devices in co-feeding system scheme is added, just obtains the generated output of co-feeding system.Ask in the same manner
Obtain heating power and the refrigeration work consumption of co-feeding system.Each equipment variable parameter operation parameter in distributed triple-generation system scheme
Obtained by correction result in step 5.
The method for designing of the distributed triple-generation system shown in the present invention, is carried out point using equipment interface annexation
Cloth cooling heating and power generation system conceptual design, very flexibly.And, the present invention has taken into full account atmospheric condition to internal combustion engine or combustion
The impact of gas-turbine, complete the type selecting to equipment and variable working condition correction in the design process, it is to avoid according to equipment nominal parameter
Type selecting and the equipment actual operation parameters that cause are out-of-limit.Meanwhile, complete to equipment running status under set meter systems variable working condition and
The calculating of power capability.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in,
All should be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (5)
1. a kind of method for designing of distributed triple-generation system is it is characterised in that the method includes：
Step 1：Design gas turbine or internal combustion engine as the initial plant of a certain technological process of distributed triple-generation system,
And select initial plant model according to the actual requirements, as the higher level equipment of its subordinate equipment；
Step 2：The temperature of n typical time period point of selection distributed triple-generation system institute applied environment, humidity, pressure ginseng
Number, the generated output to internal combustion engine or gas turbine and output working medium are modified, and obtain gas turbine or internal combustion engine consumption combustion
Stream amount, generated output, the output corresponding variable working condition value of fluid properties n；
Step 3：The working medium that higher level equipment delivery outlet produces, except can be used for the partly outer of heat supply, through correspondence working medium pipeline
To subordinate equipment, the subordinate equipment to be connect with each equipment output port of the annexation according to equipment room sets up the work of corresponding number
Matter pipeline is connected with higher level equipment delivery outlet, and the working medium pipeline other end is connected with subordinate equipment input port；
Step 4：Calculate working medium pipeline n corresponding with the subordinate equipment joint group work set up in step 3 under n typical time period point
Matter parameter, i.e. the inputted fluid properties in subordinate equipment input port；
Step 5：Using model existing for subordinate equipment and corresponding constraint, carry out subordinate equipment model selection, select suitable equipment
Model, is adjusted each delivery outlet and is delivered to the working medium of subordinate equipment in the working medium distribution being connected with this delivery outlet in working medium transmission pipeline
Ratio, make selected unit type must n group input fluid properties under can normally run, if in the absence of level equipment type
Number, technical flow design need to being re-started, if being not required to re-start technical flow design, being directed to each subordinate equipment, root
N group fluid properties according to the input of its input port are modified to this equipment output port equipment fluid properties and other output parameter,
Obtain n group correction value；
Step 6：Judge whether technical flow design terminates according to subordinate equipment, if design terminates, continue subsequent step, no
Then, using there is the subordinate equipment that must connect subordinate equipment delivery outlet as new higher level equipment, repeat step 3 arrives step 6；
Step 7：Repeat step 1 arrives step 6, can set up a plurality of technological process, and the technological process set up is combined, and forms distribution
Formula cooling heating and power generation system design；
Step 8：The generated output of calculating distributed triple-generation system, heating power, refrigeration work consumption, obtain co-feeding system
Power capability, obtains each equipment running status under variable working condition simultaneously.
2. a kind of method for designing of distributed triple-generation system according to claim 1 is it is characterised in that described step
In rapid 4, working medium flue gas considers temperature, Flux Loss, and working medium superheated steam considers temperature, pressure, Flux Loss, and working medium saturation is steamed
Vapour considers pressure, Flux Loss, and hot water considers temperature, Flux Loss.
3. a kind of method for designing of distributed triple-generation system according to claim 1 is it is characterised in that described step
In rapid 6, judge that the foundation that technical flow design terminates is：There is not delivery outlet or deposit in all subordinate equipments in described step 5
In the delivery outlet that can not connect subordinate equipment, and it is not prepared as this delivery outlet design subordinate equipment, then this technical flow design terminates.
4. a kind of method for designing of distributed triple-generation system according to claim 1 is it is characterised in that described step
In rapid 7, the number of times of repeat step 1 to step 6 is less by 1 than the bar number of technological process in distributed triple-generation system.
5. a kind of method for designing of distributed triple-generation system according to claim 1 is it is characterised in that by alliance
In system schema, the generated output of all devices is added, and just obtains the generated output of co-feeding system, tries to achieve the confession of co-feeding system in the same manner
Thermal power and refrigeration work consumption, in distributed triple-generation system scheme, each equipment variable parameter operation parameter is revised by step 5
Result obtains.
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