CN109611949A - Pipeline thermal calculation method and the monitoring using this method, heating system - Google Patents
Pipeline thermal calculation method and the monitoring using this method, heating system Download PDFInfo
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- CN109611949A CN109611949A CN201910009535.8A CN201910009535A CN109611949A CN 109611949 A CN109611949 A CN 109611949A CN 201910009535 A CN201910009535 A CN 201910009535A CN 109611949 A CN109611949 A CN 109611949A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/14—Pipes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/08—Thermal analysis or thermal optimisation
Abstract
A kind of pipeline thermal calculation method provided by the invention and the monitoring using this method, heating system, belong to pipeline heat supply process field.Pipeline thermal calculation method, for calculating the temperature of unknown node in pipeline, comprising the following steps: judge whether the output temperature for inputting each pipeline of the node is known；If it is known, then calculating the temperature of the node according to the output temperature for each pipeline for inputting the node；If unknown, according to the output temperature with the upper end node of the piping connection, the output temperature of the pipeline is solved.
Description
Technical field
The present invention relates to heating network technical fields, should in particular to a kind of pipeline thermal calculation method and use
The monitoring of method, heating system.
Background technique
In the prior art, iterative method is mostly used to carry out heat supply network simulation calculation, due to changing between hydro-thermal power equation group repeatedly
In generation, calculates, and when heat supply network is larger, convergence is more stringent, brings needs are a large amount of to calculate using iterative method.And each
It requires to update pipe network topology after water force, therefore the coefficient matrix of heat equation group is also required to regenerate, and thus brings
Calculation amount it is huge.
Summary of the invention
It is an object of the present invention to provide a kind of pipeline thermal calculation method, which is not needed
Coefficient matrix is generated, does not also need to be iterated calculating, improves computational efficiency.
It is another object of the present invention to provide a kind of monitoring system, which uses pipeline provided by the invention
Thermal calculation method can efficiently calculate pipeline heating power, accurately be regulated and controled.
Another object of the present invention is to provide a kind of heating system, which uses prison provided by the invention
Examining system can carry out high efficiency regulatory to the thermodynamic state of heating system, realize accurate heat supply.
It is that it is realized by adopting the following technical scheme that the present invention, which solves its technical problem:
In a first aspect, the present invention provides a kind of pipeline thermal calculation method, for calculating the temperature of unknown node in pipeline,
The following steps are included: judging whether the output temperature for inputting each pipeline of the node is known；If it is known, then according to input institute
The output temperature for stating each pipeline of node calculates the output temperature of the node；If unknown, basis and the pipeline
The output temperature of the upper end node of connection, solves the output temperature of the pipeline.
According in a first aspect, the basis and the upper end node of the piping connection output temperature, described in solution
The step of output temperature of pipeline further include: whether the output temperature of the upper end node of judgement and the piping connection
Know；If it is known, then executing the output temperature of the basis with the upper end node of the piping connection, the pipeline is solved
Output temperature the step of；If unknown, the output of the upper end node is calculated according to the input temp of the upper end node
Temperature.
According in a first aspect, the input temp according to the upper end node calculates the output temperature of the upper end node
The step of include: whether judgement and the input temp of the upper end node of the piping connection known；If it is known, then executing
The step of input temp according to the upper end node calculates the output temperature of the node；If unknown, to described
Whether upper end node executes the output temperature of each pipeline for judging to input the node it is known that until inputting the node
The output temperature of each pipeline is known.
According in a first aspect, the basis and the upper end node of the piping connection output temperature, described in solution
The step of output temperature of pipeline includes: according to pipeline cooling equation Tend,i=Ta+(Tstart,i-Ta)exp(-KL/mcp), it calculates
Tend,i；Wherein, TaRefer to environment temperature, Tstart,iRefer to the origin temp of the pipeline, Tend,iThe outlet temperature of pipeline is referred to,
L refers to length of pipe, and K refers to overall heat-transfer coefficient, is constant.
According in a first aspect, being solved after completing the calculating of temperature of each pipeline terminal according to node energy equilibrium equation
Obtain the output temperature of the node；Wherein, each pipeline is equal to the pipeline to the numerical value of the input temp of the node
Outlet temperature.
According in a first aspect, each pipeline origin temp, it is defeated equal to the node being connect with the starting point of the pipeline
Temperature out.
According in a first aspect, described according to each pipeline P for inputting the nodeiThe output temperature calculate the node
Output temperature the step of include: outlet temperature if intake line it is known that if according to node energy equationSolve the node output temperature
Tout；Wherein, cpRefer to fluid specific heat capacity, miReference flows through flow, Ni,inRefer to the quantity of intake line, Ni,outRefer to efferent duct
The quantity on road, mI, outRefer to output flow, mi,inRefer to input flow rate, TI, inEach pipeline is referred to the input temp of node, Tout
Refer to the output temperature of node.
According in a first aspect, the output temperature according to each pipeline for inputting the node calculates the node
After the step of output temperature further include: judge whether the node is connected with output pipe；If it is not, then terminating the pipeline
Thermodynamic computing；If so, executing according to the output temperature with the upper end node of the piping connection, the pipeline is solved
The step of output temperature.
Second aspect, the present invention provide a kind of monitoring system, including computing system and control system, the computing system with
The control system electrical connection, the computing system calculate the temperature of each node in pipeline using the pipeline thermal calculation method
Degree.The control system is used for the temperature of the node according to the pipeline, increases or decreases the heat supply to the node.
The third aspect, the present invention provide a kind of heating system, including heating network and the monitoring system, the calculating system
System and the control system are electrically connected with the heating network respectively.
The beneficial effect of the embodiment of the present invention is:
Pipeline thermal calculation method provided by the invention passes through respectively according to the output temperature meter of each pipeline of input node
The output temperature of operator node solves the output temperature of pipeline, utilizes section according to the output temperature of the upper end node with piping connection
Point energy-balance equation and pipeline cooling equation, solve the temperature of each node in pipeline in the form of deep search.To avoid
Generation coefficient matrix, does not need to be iterated calculating yet, improves computational efficiency.
Monitoring system provided by the invention calculates the temperature of each node in pipeline by computing system, and temperature information is passed
It is handed to control system, and passes through the heat supply of each node in control system control piper.Pipeline heating power is carried out in terms of efficiently by reaching
It calculates, and is accurately regulated and controled accordingly.
Heating system provided by the invention calculates the temperature of each node in heating network by computing system, and temperature is believed
Breath is transferred to control system, and the heat supply of each node in heating network is controlled by control system.To reach to heating system
Heating power distribution is efficiently calculated, and is accurately regulated and controled accordingly.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiment of the invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram of heating system provided by the invention.
Fig. 2 is the structural schematic diagram of monitoring system provided by the invention.
Fig. 3 is the flow diagram of pipeline thermal calculation method provided by the invention.
Fig. 4 is the output temperature of basis provided by the invention and the upper end node of piping connection, solves the output temperature of pipeline
The flow diagram of degree.
Fig. 5 is the output temperature of basis provided by the invention and the upper end node of piping connection, solves the output temperature of pipeline
The flow diagram of degree.
The step of Fig. 6 is the output temperature provided by the invention that upper end node is calculated according to the input temp of upper end node
Flow diagram.
Icon: 100- monitors system；110- computing system；120- control system；200- heating network；300- heat supply system
System.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that the orientation or positional relationship of the instructions such as term " on " is based on attached
Orientation or positional relationship shown in figure or the invention product using when the orientation or positional relationship usually put, be only for
Convenient for the description present invention and simplify description, rather than the device or element of indication or suggestion meaning there must be specific side
Position is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In addition, term " first ", " second ", " third " and " the 4th " etc. are only used for distinguishing description, and should not be understood as referring to
Show or imply relative importance.
In the description of the present invention, it is also necessary to which explanation, unless in addition having more specific regulation and limiting, term " is set
Set ", " connection " more broadly understanding should be done, for example, " connection " may be a fixed connection, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
With reference to the accompanying drawing, it elaborates to an embodiment of the invention, it is in the absence of conflict, following
Feature in embodiment can be combined with each other.
Fig. 1 is the structural schematic diagram of heating system 300 provided by the invention.Fig. 1 is please referred to, heating system 300 includes supplying
Hot pipe network 200 and monitoring system 100, wherein heating network 200 is electrically connected with monitoring system 100, on the one hand detection system monitors
Temperature in heating network 200 everywhere, on the other hand according to the temperature in the heating network 200 monitored everywhere to heating tube
Net 200 is controlled.To realize analysis and detection to moving law in heating network 200 and immediate status, while can
The real work of heating network 200 is regulated and controled on this basis, to play the role of precisely monitoring and controlling.
Fig. 2 is the structural schematic diagram of monitoring system 100 provided by the invention.Incorporated by reference to referring to Figures 1 and 2, system is monitored
100 include computing system 110 and control system 120, and computing system 110 is electrically connected with control system 120, computing system 110 and
Control system 120 is electrically connected with heating network 200 respectively.
Wherein, computing system 110 is used to monitor and calculate the temperature of each node in heating network 200, and control system 120 is used
In heat supply of the control to each node in heating network 200.To realize analysis and detection to immediate status in heating network 200,
And the real work of heating network 200 is regulated and controled on this basis, to play the role of precisely monitoring and controlling.
Fig. 3 is the flow diagram of pipeline thermal calculation method provided by the invention.Incorporated by reference to referring to Fig. 2 and Fig. 3, pipeline
Thermal calculation method is used to calculate the temperature of unknown node in pipeline, the pipeline thermal calculation method the following steps are included:
S101: judge whether the output temperature of each pipeline of input node is known.
It should be noted that in the present embodiment, any heat source for choosing heating network 200 is detected as first
Node, the temperature of heat source is it is known that therefore can be convenient reliable by carrying out deep search for heat source as starting point.
S102: if it is known, then according to the output temperature of the output temperature calculate node of each pipeline of input node.
It should be noted that if the outlet temperature of each pipeline is it is known that then according to node energy equationSolve node output temperature.
Wherein, cpRefer to fluid specific heat capacity, miReference flows through flow, Ni,inRefer to the quantity of intake line, Ni,outIt refers to defeated
The quantity of pipeline out, mI, outRefer to output flow, mI, inRefer to input flow rate, TI, inEach pipeline is referred to the input temperature of node
Degree, ToutRefer to the output temperature of node.
S103: if unknown, according to the output temperature with the upper end node of piping connection, the output temperature of pipeline is solved
Degree.
Fig. 4 is the output temperature of basis provided by the invention and the upper end node of piping connection, solves the output temperature of pipeline
The flow diagram of degree.Pipeline is solved according to the output temperature of the upper end node with piping connection incorporated by reference to referring to Fig. 3 and Fig. 4
Output temperature the step of include:
S1031: whether judgement and the output temperature of the upper end node of piping connection are known.
Wherein, in the present embodiment, deterministic process is completed by computing system 110, to make full use of pipeline thermodynamic computing side
Method carries out calculation processing and improves efficiency.
S1032: if it is known, then executing according to the output temperature with the upper end node of piping connection, the defeated of pipeline is solved
The step of temperature out.
It should be noted that in the present embodiment, because the temperature of output is by fluid stream for any pipeline
Amount, origin temp, environment temperature, the influence of length of pipe and fluid specific heat capacity.And fluid flow is known, environment temperature it is known that
Length of pipe and fluid specific heat capacity are it is known that can calculate output temperature according to origin temp.
Fig. 5 is the output temperature of basis provided by the invention and the upper end node of piping connection, solves the output temperature of pipeline
The flow diagram of degree.Pipeline is solved according to the output temperature of the upper end node with piping connection incorporated by reference to referring to Fig. 3 and Fig. 5
Output temperature the step of include:
S1032a: if output temperature it is known that if assignment is carried out to the origin temp of pipeline.
Wherein, because being exported to each node in downstream, after carrying out fluid mixing in each node so output temperature one
It causes, and the origin temp of each pipeline, equal to the output temperature for the node that the starting point with pipeline is connect.
S1032b: according to pipeline cooling equation Tend=Ta+(Tstart-Ta)exp(-KL/mcp), calculate Tend,i。
Wherein, TaRefer to environment temperature, TstartRefer to the origin temp of pipeline, Tend,iThe outlet temperature of pipeline is referred to, L refers to
For length of pipe, K refers to overall heat-transfer coefficient, is constant.
Wherein, it will be apparent that, cool down in equation and node energy equation from pipeline it can be seen that if upstream temperature it is known that if
Downstream temperature can be obtained directly by pipeline cooling equation or node energy equation calculation, not need to be joined with other equations
It is vertical to solve.
It should be noted that the one way propagation that pipeline cooling equation and node energy equation completely disclose temperature is special
Property, therefore heat equation solution can be carried out to heating network 200 since heat source using the method for search.
S1033: if unknown, the output temperature of upper end node is calculated according to the input temp of upper end node.
It should be noted that in the present embodiment, it is inevitable it is found that not needing according to upper end segment if the node is heat source
The input temp of point calculates the output temperature of upper end node.If the node nonthermal source, there is intake line, that is, the step can be performed
Suddenly.
The step of Fig. 6 is the output temperature provided by the invention that upper end node is calculated according to the input temp of upper end node
Flow diagram.Incorporated by reference to referring to Fig. 3 and Fig. 6, the output temperature of upper end node is calculated according to the input temp of upper end node
Step includes:
S1033a: whether judgement and the input temp of the upper end node of piping connection are known.
Wherein, in the present embodiment, deterministic process is completed by computing system 110, to make full use of pipeline thermodynamic computing side
Method carries out calculation processing and improves efficiency.
S1033b: if it is known, the step of then executing the output temperature according to the input temp calculate node of upper end node.
It should be noted that in the present embodiment, for any node, if the end for the upstream being connect with the node
Temperature it is known that because the flow of default pipeline it is known that therefore, according to the flow proportional of each pipeline to the end temperature of upstream
Degree weighted average, can be obtained the input temp of the node.
S1033c: if unknown, whether the output temperature of each pipeline of input node is judged to the execution of upper end node
Know, until the output temperature of each pipeline of input node is known.
It should be noted that in the present embodiment, all input pipes being connected with the node are needed for any node
The terminal temperature on road solves, and can learn the input temp of the node.
S104: judge whether node is connected with output pipe.
It should be noted that whether it is connected with output pipe by judging node to avoid holiday pipeline and node,
To guarantee the integrality scanned for total system.
Explanation is also needed, since the flux and flow direction of heating network 200 is determined by pipe ends pressure difference, and pressure
It originally is one kind of potential energy, therefore there are the highs and lows of pressure in each node.Node highest for pressure, will not
There are flow ipes, and the node minimum for pressure, will not there is outflow pipeline.Therefore it ensure that in depth-first search
In certainly exist recurrence outlet, so as to avoid the generation of endless loop.
S105: if it is not, then terminating pipeline thermodynamic computing.
Wherein, the beginning and end temperature of all pipelines has been when terminating pipeline thermodynamic computing, in the heating network 200
Know, i.e., the temperature of all nodes is it is known that consequently facilitating the heating power output that user regulates and controls everywhere according to the temperature of node.
It should be noted that, if being judged as YES, executing root in judging the step of whether node is connected with output pipe
According to the output temperature of the upper end node with piping connection, the step of solving the output temperature of pipeline, to be searched by depth-first
The heat equation that rope technology completes pipe network solves.
As a comparison, Krylov subspace iterative method is a kind of general solution for solving sparse vectors, however
In heat supply network simulation calculation, due to the calculating that iterates between hydro-thermal power equation group, when heat supply network is larger, convergence more
It is still very considerable using Krylov subspace iterative method bring computing cost when stringent.Meanwhile after each water force
It requires to update pipe network topology, therefore the coefficient matrix of heat equation group is also required to regenerate, thus bring calculation amount
It is very important.
Specifically, for the heat supply network example of three groups of different scales, the scale of heat equation group, the number of outer iteration, heat
The data such as table 1 of power equation calculation time accounting:
Heat supply network thermodynamic computing compares under the different example scales of table 1
As can be seen that with the increase of pipe network scale, the scale of heat equation group constantly increases, simultaneously because generating coefficient
Overhead brought by matrix, entire thermodynamic computing also have increased trend in the accounting amounted in evaluation time.Generally for
The scale of one heating network 200, heat equation group will easily reach thousands of dimensions, can infer and be only completed single operating condition
The water thermodynamic computing time will just be substantially increased, so if the expense for having method that thermodynamic computing is greatly reduced, it will effectively
Improve the computational efficiency that heating network 200 emulates.
Therefore, the present invention solves heat equation group using the method for depth-first search, and this method is asked compared to traditional
The iterative method of solution system of linear equations, which avoids, generates overhead brought by coefficient matrix in iterative method；And combine pipe network topology
Actual features, solve each heat equation by particular order, do not need to be iterated calculating, substantially increase computational efficiency.
Table 2 provides after using 200 thermal calculation method of heating network based on depth-first search, in table 1
Comparison between the computational efficiency and iterative solution equation group of three examples, has absolutely proved Practical significance of the invention.
Table 2 calculates time comparison
The principle of pipeline thermal calculation method provided by the invention is:
Definition node is V, if the temperature of V is T0, the flow flowed through is m0.If V is heat source, T0, m0It is known and by its generation
In ingress energy-balance equation.Otherwise to each flow ipe P of the pointiIf its outlet temperature is Tend,i, flow through flow
For mi.If Pi outlet temperature Tend,iIt is known that then by Tend,iAnd miNode energy equilibrium equation is substituted into, the mixing of V point is then calculated
Temperature T afterwardsout.Otherwise by PiThe node generation time that starting point is connected is the judgement of heat source or load to the node, completes Pi
After the back substitution of starting point calculates, Tend,iValue will become known state, then again by Tend,iAnd miNode energy equilibrium equation is substituted into,
Finally calculate the mixed temperature T of V pointout.If V is load, the temperature T of V is enabled0Equal to Tout, to each effuser of V
Road PjIf its origin temp is Tstart,j, enable Tstart,jEqual to Tout, then by Tstart,jPipeline temperature drop equation calculation is substituted into obtain
Tend,j.To each outflow pipeline P of VjIf the pipeline is not visited, by PjIt is set as being accessed state, together
When by PjIn the node generation that terminal is connected, returns in the calculating of node energy equilibrium equation.If V does not flow out pipeline or all outflows
Pipeline is all accessed, then is terminated.
In conclusion pipeline thermal calculation method provided by the invention passes through respectively then according to each pipeline of input node
The temperature of output temperature calculate node solves the output temperature of pipeline according to the output temperature of the upper end node with piping connection,
Using node energy equilibrium equation and pipeline cooling equation, the temperature of each node in pipeline is solved in the form of depth search.From
And generation coefficient matrix is avoided, it does not need to be iterated calculating yet, improves computational efficiency.
Monitoring system 100 provided by the invention calculates the temperature of each node in pipeline by computing system 110, and by temperature
Information is transferred to control system 120, and passes through the heat supply of each node in 120 control piper of control system.To reach to pipeline heat
Power is efficiently calculated, and is accurately regulated and controled accordingly.
Heating system 300 provided by the invention calculates the temperature of each node in heating network 200 by computing system 110,
And temperature information is transferred to control system 120, and the heat supply of each node in heating network 200 is controlled by control system 120.
The distribution of the heating power of heating system 300 is efficiently calculated with reaching, and is accurately regulated and controled accordingly.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of pipeline thermal calculation method, for calculating the temperature of unknown node in pipeline, which is characterized in that including following step
It is rapid:
Judge whether the output temperature for inputting each pipeline of the node is known；
If it is known, then calculating the output temperature of the node according to the output temperature for each pipeline for inputting the node；
If unknown, according to the output temperature with the upper end node of the piping connection, the output temperature of the pipeline is solved.
2. pipeline thermal calculation method as described in claim 1, which is characterized in that the basis and the piping connection
The output temperature of the upper end node, the step of solving the output temperature of the pipeline further include:
Whether judgement and the output temperature of the upper end node of the piping connection are known；
If it is known, then executing the output temperature of the basis with the upper end node of the piping connection, the pipe is solved
The step of output temperature on road；
If unknown, the output temperature of the upper end node is calculated according to the input temp of the upper end node.
3. pipeline thermal calculation method as described in claim 2, which is characterized in that described according to the defeated of the upper end node
The step of entering described in temperature computation the output temperature of upper end node include:
Whether judgement and the input temp of the upper end node of the piping connection are known；
If it is known, then executing the input temp according to the upper end node, the step of the output temperature of the node is calculated
Suddenly；
If unknown, whether the output temperature of each pipeline for judging to input the node is executed to the upper end node
Know, it is known until inputting the output temperature of each pipeline of the node.
4. pipeline thermal calculation method as described in claim 2, which is characterized in that the basis and the piping connection
The output temperature of the upper end node, the step of solving the output temperature of the pipeline include:
According to pipeline cooling equation Tend,i=Ta+(Tstart,i-Ta)exp(-KL/mcp), calculate Tend,i；Wherein, TaRefer to environment
Temperature, Tstart,iRefer to the origin temp of the pipeline, Tend,iThe outlet temperature of pipeline is referred to, L refers to length of pipe, and K is referred to
Overall heat-transfer coefficient is constant.
5. pipeline thermal calculation method as described in claim 4, which is characterized in that complete the temperature of each pipeline terminal
After calculating, according to node energy equilibrium equation solve the node output temperature；Wherein, each pipeline is to the node
Input temp numerical value be equal to the pipeline outlet temperature.
6. pipeline thermal calculation method as described in claim 4, which is characterized in that the origin temp of each pipeline, etc.
In the output temperature for the node being connect with the starting point of the pipeline.
7. pipeline thermal calculation method as described in claim 1, which is characterized in that described according to each of the input node
Pipeline PiOutput temperature the step of calculating the output temperature of the node include:
If intake line outlet temperature it is known that if according to node energy equationSolve the node output temperature
Tout；Wherein, cpRefer to fluid specific heat capacity, miReference flows through flow, Ni,inRefer to the quantity of intake line, Ni,outRefer to efferent duct
The quantity on road, mI, outRefer to output flow, mi,inRefer to input flow rate, TI, inEach pipeline is referred to the input temp of node, Tout
Refer to the output temperature of node.
8. pipeline thermal calculation method as described in claim 1, which is characterized in that described according to each of the input node
After the step of output temperature of pipeline calculates the output temperature of the node further include:
Judge whether the node is connected with output pipe；
If it is not, then terminating the pipeline thermodynamic computing；
If so, executing according to the output temperature with the upper end node of the piping connection, the output of the pipeline is solved
The step of temperature.
9. a kind of monitoring system, which is characterized in that including computing system and control system, the computing system and the control are
System electrical connection, the computing system use pipeline thermal calculation method of any of claims 1-8 such as to calculate pipeline
In each node temperature；
The control system is used for the temperature of the node according to the pipeline, increases or decreases the heat supply to the node.
10. a kind of heating system, which is characterized in that including heating network and monitoring system as claimed in claim 9, the meter
Calculation system and the control system are electrically connected with the heating network respectively.
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