CN116776512A - Pipe network loss determination method based on unit area energy consumption - Google Patents
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- 238000005265 energy consumption Methods 0.000 title claims abstract description 18
- 238000004364 calculation method Methods 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims description 39
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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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- 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
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1048—Counting of energy consumption
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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
- G06F2119/02—Reliability analysis or reliability optimisation; Failure analysis, e.g. worst case scenario performance, failure mode and effects analysis [FMEA]
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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
According to the pipe network loss determination method based on unit area energy consumption, the real-time data displayed by the heat meter are collected, the heat supply area is calculated to calculate the pipe network loss coefficient, and the accuracy of the pipe network loss coefficient is improved. And because the temperature difference of the supplied water is not directly adopted, but the average temperature difference of the current period is adopted to calculate the heat consumption, the error that the measured temperature may be an instantaneous value or the heat inertia caused by heat transfer can be avoided. After the pipe network loss coefficient of energy consumption per unit area is determined, the heat loss can be reasonably utilized, the heat consumption can be reasonably distributed, the utilization efficiency of the heat can be improved, and the heat supply cost can be reduced. Meanwhile, the defect of adopting the traditional pipe network loss calculation method can be overcome, and the error generated by the influence of the measuring accuracy of the instrument on the measuring range of the instrument or the quality factor of hot water is solved.
Description
Technical Field
The invention belongs to the technical field of pipe network heat supply, and particularly relates to a method for determining pipe network loss based on unit area energy consumption.
Background
The energy consumption in heat supply mainly comprises heat, electricity, water, materials, personnel and the like, and for hot water heat supply, the difference exists between the heat transported by a heat source and the heat reaching a user, namely the pipe network loss, so that the pipe network loss is one of effective ways for saving the heat supply cost.
The traditional method for determining the loss of the heating pipe network is to test the running performance of the water flow of each pipe section and the water temperature of the inlet and outlet of the water supply/return pipe respectively, and then calculate the accumulated heat quantity and the heat loss of the pipe network of each measured pipe section. Meanwhile, due to the fact that the internal environment of the heat supply network is complex, the traditional method is easy to be subjected to environmental disturbance, network configuration and other factor impressions, the determined pipe network loss is low in accuracy, accurate and visual data cannot be provided for enterprises, the enterprises cannot accurately and visually know the real profit of pipe network steam delivery, and the control of the enterprise cost is not facilitated, and energy conservation is achieved.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for determining pipe network loss based on unit area energy consumption. The technical problems to be solved by the invention are realized by the following technical scheme:
the pipe network loss determining method based on unit area energy consumption provided by the invention comprises the following steps:
acquiring heat consumption of a heat meter of each heat station in a heat supply system in a current period, charging area of each heat station and theoretical total heat consumption of the heat meter of each heat source in the current period;
calculating the total heat consumption of each heating power station in the current period;
determining the total chargeable area of each heat source according to the corresponding relation between each heat source and a plurality of heat stations;
calculating the actual total heat consumption of each heat source in the current period based on the total heat consumption of each heat station in the current period;
wherein, one heat source corresponds to a plurality of heating stations, and one heat supply company corresponds to a plurality of heat sources;
summing the total heat consumption of the heat meter of the heat sources supplied by each heat supply company in the current period to obtain the total heat consumption of the heat supply company; summing the total chargeable areas of the heat sources supplied by the heat supply company to obtain the total chargeable area of the heat supply company;
calculating the actual unit area heat consumption of each heat source according to the actual total heat consumption of each heat source in the current period and the total chargeable area of the heat source, and calculating the unit area heat consumption of the heat supply company according to the total heat consumption of the heat supply company and the total chargeable area of the heat supply company;
calculating the pipe network loss of the heat supply company on each heat source by using a pipe network loss calculation formula according to the heat consumption of the heat supply company in unit area and the actual heat consumption of the heat sources supplied by the heat supply company in unit area;
wherein, the pipe network loss calculation formula is:
wherein ,representing the actual heat consumption per unit area of a certain heat source supplied by the heating company, < >>Represents the heat consumption of a thermodynamic company per unit area, deltaQ sj Representing the total heat consumption of a heating company, which is the sum of theoretical total heat consumption of a plurality of heat sources supplied, A Total (S) The total area of the heating company is represented as the sum of the total chargeable areas of the plurality of heat sources to be supplied.
Optionally, calculating the total heat consumption of each heat station in the current cycle includes:
summing the heat consumption of each heat meter of the heat station in the current period by using a heat summation formula aiming at each heat station to obtain the total heat consumption of the heat station in the current period;
the heat summation formula is:
△Q＝△Q 1 +△Q 2 +…+△Q i
wherein ,ΔQi ＝Q i current period 0 point value -Q i, previous period 0 point value ，Q i, 0 point value of current period The heat consumption of the ith heat meter at the 0 point of the current day period is expressed in GJ; q (Q) i, previous period 0 point value The heat consumption of the ith heating station at the 0 point of the previous cycle is expressed in GJ.
Optionally, determining the total chargeable area of each heat source according to the correspondence between each heat source and the plurality of heat stations includes:
determining a plurality of target heat stations supplied by each heat source according to heat sources of a heat supply company in a heat supply system;
summing the charging areas of the target heat stations supplied by each heat source by using an area summation formula to obtain the total charging area of the heat source;
the area summation formula is:
A z total ＝A z,1 +A z,2 +…+A z,i
wherein ,Az total Representing the total chargeable area of each heat source, A z,i Representing the charged area of the ith destination thermal station.
Optionally, calculating the total heat consumption of each heat source in the current period based on the total heat consumption of each heat station in the current period includes:
determining a plurality of target heat stations supplied by each heat source according to a plurality of heat sources supplied by a heat supply company in a heat supply system;
for each heat source, summing the total heat consumption of the target heat station supplied by the heat source in the current period to obtain the actual total heat consumption of the heat source in the current period.
Alternatively, the sum of the theoretical total heat consumption of the plurality of heat sources supplied by the heat supply company is expressed as:
ΔQ sj ＝ΔQ 1 +ΔQ 2 +ΔQ 3 …+ΔQ n
wherein ,ΔQn Indicating total heat consumption of the nth heat source corresponding to the heat supply company in the current period, delta Q sj Representing the total heat consumption of the heating company, which is the sum of the total heat consumption of the supplied heat sources in the current period.
Alternatively, the sum of the total chargeable areas of the plurality of heat sources supplied by the heat supply company is expressed as:
A total (S) ＝A 1 +A 2 +…+A n
wherein ,ATotal (S) Representing the total chargeable area of a heating company, A being the sum of the total chargeable areas of a plurality of heat sources supplied n Indicating the total chargeable area of the nth heat source supplied by the heating company.
Optionally, after calculating the pipe network loss of the heat supply company on each heat source by using a pipe network loss calculation formula according to the heat consumption per unit area of the heat supply company and the heat consumption per unit area of the plurality of heat sources supplied by the heat supply company, the pipe network loss determination method further includes:
and calculating the loss of the whole pipe network of the heat supply company.
Optionally, the calculating the overall pipe network loss of the heating company includes:
calculating the overall pipe network loss of the heat supply company by using an overall pipe network loss calculation formula based on the actual total heat consumption of each heat source, the theoretical total heat consumption of each heat source and the total chargeable area of each heat source supplied by the heat supply company;
the calculation formula of the loss of the whole pipe network is as follows:
wherein delta represents the loss of the whole pipe network of the heat supply company; ΔQ 1 +ΔQ 2 +…+ΔQ i Representing the actual total heat consumption of the 1 st heat source supplied by the heat supply company; ΔQ 1 ″+ΔQ 2 ″+…+ΔQ i "represents the actual total heat consumption, deltaQ, of the 2 nd heat source supplied by the heating company 1 n +ΔQ 2 n +…+ΔQ i n Representing the actual total heat consumption of the nth heat source supplied by the heat supply company; a is that z,1 +A z,2 +…A z,j Represents the sum of the total chargeable areas of the 1 st heat source, A z,1 ″+A z,2 ″+…A z,j "means the sum of the total chargeable areas of the 2 nd heat sources, A z,1 n +A z,2 n +…A z,j n Representing the sum of the total chargeable areas of the nth heat source.
The invention has the beneficial effects that:
1. according to the pipe network loss determination method based on unit area energy consumption, the real-time data displayed by the heat meter are collected, the heat supply area is calculated to calculate the pipe network loss coefficient, and the accuracy of the pipe network loss coefficient is improved.
2. According to the pipe network loss determination method based on unit area energy consumption, provided by the invention, the heat consumption is calculated by adopting the average temperature difference in the current period instead of directly adopting the temperature difference of the water supply and return, so that errors caused by instantaneous values of the measured temperature or thermal inertia due to heat transfer can be avoided.
3. According to the pipe network loss determination method based on unit area energy consumption, after the pipe network loss coefficient of unit area energy consumption is determined, heat loss can be reasonably utilized, heat energy consumption can be reasonably distributed, the utilization efficiency of heat energy is improved, and the heat supply cost is reduced.
4. The invention can make up the defect of adopting the traditional pipe network loss calculation method, and simultaneously solves the problem that the measuring precision of the instrument is influenced by the measuring range of the instrument or the quality factor of hot water.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic flow chart of a pipe network loss determining method based on unit area energy consumption according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but embodiments of the present invention are not limited thereto.
As shown in fig. 1, the pipe network loss determining method based on unit area energy consumption provided by the invention comprises the following steps:
s1, acquiring heat consumption of a heat meter of each heat station in a heat supply system in a current period, a charging area of each heat station and theoretical total heat consumption of the heat meter of each heat source in the current period;
s2, calculating the total heat consumption of each heat supply station in the current period;
s3, determining the total chargeable area of each heat source according to the corresponding relation between each heat source and a plurality of heat stations;
wherein, one heat source corresponds to a plurality of heating stations, and one heat supply company corresponds to a plurality of heat sources;
in an actual heating system, a heat source consists of a heat exchange station 1, a heat exchange station 2 and a heat exchange station 3 and … …, and a thermal company has different heat sources in different areas and consists of a heat source 1, a heat source 2 and a heat source 3 and … ….
S4, calculating the actual total heat consumption of each heat source in the current period based on the total heat consumption of each heat station in the current period;
the period can be selected to be 1 day when in actual operation, and the actual adjustment is naturally carried out according to the requirements of a heating company or a heating station.
S5, summing the total heat consumption of the heat meter of the plurality of heat sources supplied by each heat supply company in the current period to obtain the total heat consumption of the heat supply company; summing the total chargeable areas of the heat sources supplied by the heat supply company to obtain the total chargeable area of the heat supply company;
the sum of the theoretical total heat consumption of the plurality of heat sources supplied by the heat supply company is expressed as:
ΔQ sj ＝ΔQ 1 +ΔQ 2 +ΔQ 3 …+ΔQ n
wherein ,ΔQn Represents the theoretical total heat consumption, delta Q, of the nth heat source corresponding to a heat supply company in the current period sj Representing the total heat consumption of the heating company, which is the sum of the theoretical total heat consumption of a plurality of heat sources in the current period.
The sum of the total chargeable areas of the plurality of heat sources supplied by the heating company is expressed as:
A total (S) ＝A 1 +A 2 +…+A n
wherein ,ATotal (S) Represents the total area of a heating company, A is the sum of the total chargeable areas of a plurality of heat sources n Indicating the total chargeable area of the nth heat source supplied by the heating company.
S6, calculating the actual unit area heat consumption of each heat source according to the actual total heat consumption of each heat source in the current period and the total chargeable area of the heat source, and calculating the unit area heat consumption of the heat supply company according to the total heat consumption of the heat supply company and the total chargeable area of the heat supply company;
and S7, calculating the pipe network loss of the heat supply company on each heat source by using a pipe network loss calculation formula according to the heat consumption of the heat supply company in unit area and the actual heat consumption of the heat sources supplied by the heat supply company in unit area.
Wherein, pipe network loss calculation formula is:
wherein ,representing the actual heat consumption per unit area of a certain heat source supplied by the heating company, < >>Represents the heat consumption of a thermodynamic company per unit area, deltaQ sj Representing the total heat consumption of a heating company, which is the sum of theoretical total heat consumption of a plurality of heat sources supplied, A Total (S) The total chargeable area of the heat supply company is represented as the sum of the total chargeable areas of the plurality of heat sources to be supplied.
According to the pipe network loss determination method based on unit area energy consumption, the real-time data displayed by the heat meter are collected, the heat supply area is calculated to calculate the pipe network loss coefficient, and the accuracy of the pipe network loss coefficient is improved. And because the temperature difference of the supplied water is not directly adopted, but the average temperature difference of the current period is adopted to calculate the heat consumption, the error that the measured temperature may be an instantaneous value or the heat inertia caused by heat transfer can be avoided. After the pipe network loss coefficient of energy consumption per unit area is determined, the heat loss can be reasonably utilized, the heat consumption can be reasonably distributed, the utilization efficiency of the heat can be improved, and the heat supply cost can be reduced. Meanwhile, the defect of adopting the traditional pipe network loss calculation method can be overcome, and the error generated by the influence of the measuring accuracy of the instrument on the measuring range of the instrument or the quality factor of hot water is solved.
As an alternative embodiment of the present invention, calculating the total heat consumption of each heating station in the current cycle includes:
summing the heat consumption of each heat meter of the heat supply station in the current period by using a heat summation formula aiming at each heat station to obtain the total heat consumption of the heat station in the current period;
the heat summation formula is:
Σ△Q i ＝△Q 1 +△Q 2 +…+△Q i
wherein ,ΔQi ＝Q i current period 0 point value -Q i, previous period 0 point value ，Q i, 0 point value of current period The heat consumption of the ith heat meter at the 0 point of the current day period is expressed in GJ; q (Q) i, previous period 0 point value The heat consumption of the ith heat meter at the 0 point of the previous cycle is expressed in GJ.
As an alternative embodiment of the present invention, determining the total chargeable area of each heat source according to the correspondence between each heat source and the plurality of heat stations includes:
step a: determining a plurality of target heat stations supplied by each heat source according to heat sources of a heat supply company in a heat supply system;
step b: summing the charging areas of the target heat stations supplied by each heat source by using an area summation formula to obtain the total charging area of the heat source;
the area summation formula is: a is that z total ＝A z,1 +A z,2 +…+A z,i
wherein ,ATotal (S) Representing the total chargeable area of the heat source, A z,i Representing the charged area of the ith destination thermal station.
As an alternative embodiment of the present invention, calculating the actual total heat consumption of each heat source during the current period based on the total heat consumption of each heat station during the current period comprises:
step a: determining a plurality of target heat stations supplied by each heat source according to heat sources of a heat supply company in a heat supply system;
step b: for each heat source, summing the total heat consumption of the target heat station supplied by the heat source in the current period to obtain the actual total heat consumption of the heat source in the current period.
As an alternative embodiment of the present invention, after calculating a pipe network loss of a heat supply company on each heat source using a pipe network loss calculation formula according to a heat consumption per unit area of the heat supply company and an actual heat consumption per unit area of a plurality of heat sources supplied by the heat supply company, the pipe network loss determination method further includes:
and calculating the loss of the whole pipe network of the heat supply company.
As an optional embodiment of the present invention, the calculating the overall pipe network loss of the heating company includes:
calculating the overall pipe network loss of the heat supply company by using an overall pipe network loss calculation formula based on the actual total heat consumption of each heat source, the theoretical total heat consumption of each heat source and the total chargeable area of each heat source supplied by the heat supply company;
the calculation formula of the loss of the whole pipe network is as follows:
wherein delta represents the loss of the whole pipe network of the heat supply company; ΔQ 1 +ΔQ 2 +…+ΔQ i Representing the actual total heat consumption of the 1 st heat source supplied by the heat supply company; ΔQ 1 ″+ΔQ 2 ″+…+ΔQ i "represents the actual total heat consumption, deltaQ, of the 2 nd heat source supplied by the heating company 1 n +ΔQ 2 n +…+ΔQ i n Representing the actual total heat consumption of the nth heat source supplied by the heat supply company; a is that z,1 +A z,2 +…A z,j Represents the sum of the total chargeable areas of the 1 st heat source, A z,1 ″+A z,2 ″+…A z,j "means the sum of the total chargeable areas of the 2 nd heat sources, A z,1 n +A z,2 n +…A z,j n Representing the sum of the total chargeable areas of the nth heat source.
It can be understood that the loss between the input cost and the income of the heating company can be obtained by calculating the loss of the whole pipe network of the heating company, thereby being beneficial to saving the cost of the heating company. And simultaneously, the device also provides assistance for maintenance and overhaul.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (8)
1. The pipe network loss determining method based on unit area energy consumption is characterized by comprising the following steps of:
acquiring heat consumption of a heat meter of each heat station in a heat supply system in a current period, charging area of each heat station and theoretical total heat consumption of the heat meter of each heat source in the current period;
calculating the total heat consumption of each heating power station in the current period;
determining the total chargeable area of each heat source according to the corresponding relation between each heat source and a plurality of heat stations;
calculating the actual total heat consumption of each heat source in the current period based on the total heat consumption of each heat station in the current period;
wherein, one heat source corresponds to a plurality of heating stations, and one heat supply company corresponds to a plurality of heat sources;
summing the total heat consumption of the heat meter of the heat sources supplied by each heat supply company in the current period to obtain the total heat consumption of the heat supply company; summing the total chargeable areas of the heat sources supplied by the heat supply company to obtain the total chargeable area of the heat supply company;
calculating the actual unit area heat consumption of each heat source according to the actual total heat consumption of each heat source in the current period and the total chargeable area of the heat source, and calculating the unit area heat consumption of the heat supply company according to the total heat consumption of the heat supply company and the total chargeable area of the heat supply company;
calculating the pipe network loss of the heat supply company on each heat source by using a pipe network loss calculation formula according to the heat consumption of the heat supply company in unit area and the actual heat consumption of the heat sources supplied by the heat supply company in unit area;
wherein, the pipe network loss calculation formula is:
wherein ,indicating the actual heat consumption per unit area of a certain heat source supplied by the heating company,represents the heat consumption of a thermodynamic company per unit area, deltaQ sj Representing the total heat consumption of a heating company, which is the sum of theoretical total heat consumption of a plurality of heat sources supplied, A Total (S) The total area of the heating company is represented as the sum of the total chargeable areas of the plurality of heat sources to be supplied.
2. The method of claim 1, wherein calculating the total heat consumption for each heat station in the current cycle comprises:
summing the heat consumption of each heat meter of the heat station in the current period by using a heat summation formula aiming at each heat station to obtain the total heat consumption of the heat station in the current period;
the heat summation formula is:
△Q＝△Q 1 +△Q 2 +…+△Q i
wherein ,ΔQi ＝Q i Current period 0 point value-Q i, previous period 0 point value ，Q i, 0 point value of current period The heat consumption of the ith heat meter at the 0 point of the current day period is expressed in GJ; q (Q) i, previous period 0 point value The heat consumption of the ith heating station at the 0 point of the previous cycle is expressed in GJ.
3. The method for determining pipe network loss according to claim 1, wherein determining the total chargeable area of each heat source according to the correspondence between each heat source and the plurality of heat stations comprises:
determining a plurality of target heat stations supplied by each heat source according to heat sources of a heat supply company in a heat supply system;
summing the charging areas of the target heat stations supplied by each heat source by using an area summation formula to obtain the total charging area of the heat source;
the area summation formula is:
A z total ＝A z,1 +A z,2 +…+A z,i
wherein ,Az total Representing the total chargeable area of each heat source, A z,i Representing the charged area of the ith destination thermal station.
4. The method of claim 2, wherein calculating the actual total heat consumption of each heat source during the current cycle based on the total heat consumption of each heat station during the current cycle comprises:
determining a plurality of target heat stations supplied by each heat source according to a plurality of heat sources supplied by a heat supply company in a heat supply system;
for each heat source, summing the total heat consumption of the target heat station supplied by the heat source in the current period to obtain the actual total heat consumption of the heat source in the current period.
5. The method of claim 1, wherein the sum of theoretical total heat consumption of a plurality of heat sources supplied by a heat supply company is expressed as:
ΔQ sj ＝ΔQ 1 +ΔQ 2 +ΔQ 3 …+ΔQ n
wherein ,ΔQn Represents the theoretical total heat consumption, delta Q, of the nth heat source corresponding to a heat supply company in the current period sj Representing the total heat consumption of the heating company, which is the sum of the total heat consumption of the supplied heat sources in the current period.
6. The network loss determination method according to claim 2, wherein the sum of total chargeable areas of the plurality of heat sources supplied from the heat supply company is expressed as:
A total (S) ＝A 1 +A 2 +…+A n
wherein ,ATotal (S) Represents the total chargeable area of a heating company, A is the sum of the total chargeable areas of a plurality of heat sources n Indicating the total chargeable area of the nth heat source supplied by the heating company.
7. The pipe network loss determination method according to claim 1, wherein after calculating the pipe network loss of the heat supply company on the heat source using a pipe network loss calculation formula based on the actual heat consumption per unit area of the heat supply company, the heat consumption per unit area of the plurality of heat sources supplied by the heat supply company, for each heat source, the pipe network loss determination method further comprises:
and calculating the loss of the whole pipe network of the heat supply company.
8. The network loss determination method according to claim 7, wherein calculating the overall network loss of the heating company includes:
calculating the overall pipe network loss of the heat supply company by using an overall pipe network loss calculation formula based on the actual total heat consumption of each heat source, the theoretical total heat consumption of each heat source and the total chargeable area of each heat source supplied by the heat supply company;
the calculation formula of the loss of the whole pipe network is as follows:
wherein delta represents the loss of the whole pipe network of the heat supply company; ΔQ 1 +ΔQ 2 +…+ΔQ i Representing the actual total heat consumption of the 1 st heat source supplied by the heat supply company; ΔQ 1 ″+ΔQ 2 ″+…+ΔQ i "represents the actual total heat consumption, deltaQ, of the 2 nd heat source supplied by the heating company 1 n +ΔQ 2 n +…+ΔQ i n Representing the actual total heat consumption of the nth heat source supplied by the heat supply company; a is that z,1 +A z,2 +…A z,j Represents the sum of the total chargeable areas of the 1 st heat source, A z,1 ″+A z,2 ″+…A z,j "means the sum of the total chargeable areas of the 2 nd heat sources, A z,1 n +A z,2 n +…A z,j n Representing the sum of the total chargeable areas of the nth heat source.
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