Heat supply optimization system and method based on pipe network conveying capacity

Abstract

The invention relates to the technical field of heat supply optimization, in particular to a heat supply optimization system and method based on pipe network conveying capacity. According to the method, a plurality of temperature sensors and flowmeters are mounted in the pipe network to detect the temperature and flow at a plurality of nodes of the pipe network, so that the conveying condition of the current pipe network can be mastered more accurately; meanwhile, the pre-estimated heat loss and the actual heat loss are calculated according to the obtained temperature and flow, whether heat supply of the pipe network is qualified or not is judged according to the difference value between the pre-estimated heat loss and the actual heat loss, and whether heat supply of the pipe network is qualified or not can be judged more quickly; and the estimated heat loss or the heat loss difference value is corrected or the pipe network maintenance notification is sent out under the unqualified condition, so that the pipe network can be subjected to targeted optimization to ensure that the heat loss values of different pipe networks in the operation process are within the preset range, and the working efficiency of the heat supply pipe network is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat supply optimization, and in particular to a heat supply optimization system and method based on pipeline network transportation capacity. Background Art

[0002] Heat supply optimization based on pipeline network transmission capacity is one of the core technologies in the design and operation of district heating systems (DHS). Its background technology involves improving heat transmission efficiency, energy conservation, ensuring system stability, and low-carbon transformation. With the adjustment of the global energy structure, heating systems need to reduce fossil energy consumption and carbon emissions. As the key carrier connecting heat sources and users, the transmission capacity of the pipeline network directly affects the overall energy efficiency of the system. Optimizing the pipeline network's transmission capacity can reduce pumping energy consumption, reduce heat loss, and increase the proportion of renewable energy (such as industrial waste heat, geothermal energy, and biomass energy) consumed. Due to user-side load fluctuations (such as household metering and intermittent heating), higher requirements are placed on the hydraulic stability of the pipeline network. Insufficient transmission capacity can lead to insufficient heating for remote users (hydraulic imbalance) or overheating for nearby users, resulting in energy waste.

[0003] Chinese patent publication number: CN112417662B discloses a method for achieving dynamic hydraulic optimization of a centralized heating pipe network system. The invention is based on a nonlinear programming algorithm and includes the following steps: 1) calibrating the pipe network resistance, heat user resistance, electric valve characteristic curve and water pump characteristic curve of the centralized heating pipe network system; wherein, the pipe network and heat user resistance are calibrated by combining the measured parameters of the pipe network design diagram, pressure gauge and heat meter; the electric valve characteristic curve is obtained by measuring a number of flow rates and valve opening corresponding values under a certain water supply pressure to obtain a fitting characteristic curve; the water pump characteristic curve is obtained by closing the electric valve to adjust the pipe network resistance and measuring a number of total supply and return water flow rates and pressure differences; 2) establishing a hydraulic balance equation; 3) with the goal of minimizing the water pump transmission energy consumption, using the electric valve resistance, thermal inlet flow rate and total supply and return water pressure difference as constraint variables.

[0004] It can be seen that the existing technology has the following problems: it is unable to perform targeted optimization of the pipeline network based on the reasons for the unqualified heating of the pipeline network to ensure that the heat loss values of different pipeline networks during operation are within a preset range, thereby making the working efficiency of the heating pipeline network low. Summary of the Invention

[0005] To this end, the present invention provides a heating optimization system and method based on the pipeline network's transportation capacity, which is used to overcome the problem in the prior art that the pipeline network cannot be targetedly optimized according to the reasons for the pipeline network's unqualified heating to ensure that the heat loss values of different pipeline networks during operation are within a preset range, thereby resulting in low working efficiency of the heating pipeline network.

[0006] To achieve the above objectives, the present invention provides a heat supply optimization method based on the pipeline network transmission capacity, comprising:

[0007] Obtain the temperature at several nodes of the pipe network based on several temperature sensors installed in the pipe network;

[0008] Obtaining flow rates at a plurality of nodes of the pipe network based on a plurality of flow meters installed in the pipe network;

[0009] Calculating the heat loss of each pipe network based on a steady-state heat dissipation formula, and calculating an average of multiple heat losses to obtain an estimated heat loss;

[0010] Calculating the actual heat loss of the pipe network based on the temperature difference between the supply water and the return water and the average flow rate of the pipe network, wherein the average flow rate is the average of the flow rates of several nodes in the pipe network;

[0011] Determining whether the heat supply of the pipe network is qualified based on the difference between the actual heat loss and the estimated heat loss, and generating a corresponding treatment method based on the reason for the failure if the heat supply is unqualified, wherein the treatment method includes correcting the estimated heat loss, correcting the heat loss difference, and issuing a pipe network maintenance notice;

[0012] Adjustments are made based on the corresponding processing methods.

[0013] Furthermore, the process of determining whether the heating supply of the pipeline network is qualified based on the difference between the actual heat loss and the estimated heat loss includes: calculating the difference between the actual heat loss and the estimated heat loss; determining whether the heating supply of the pipeline network is qualified based on the comparison result of the difference and the pre-stored preset heat loss difference; if the difference is less than or equal to the first preset heat loss difference, determining that the heating supply of the pipeline network is qualified; if the difference is greater than the first preset heat loss difference and less than the second preset heat loss difference, obtaining the historical difference, and determining whether the heating supply of the pipeline network is qualified based on the variance of the historical difference; if the difference is greater than or equal to the second preset heat loss difference, determining that the heating supply of the pipeline network is unqualified, and determining the reason for the unqualified heating supply of the pipeline network based on the average value of the temperature of each node of the pipeline network in the current detection period.

[0014] Furthermore, the process of determining whether the heating supply of the pipeline network is qualified based on the variance of historical differences includes: calculating the variance of the historical differences; comparing the variance with a preset variance; if the variance is less than or equal to the preset variance, determining that the heating supply of the pipeline network is unqualified, and determining the reason for the unqualified heating supply of the pipeline network based on the average value of the temperature of each node of the pipeline network in the current detection cycle; if the variance is greater than the preset variance, drawing a detection cycle-actual heat loss curve, and determining whether the heating supply of the pipeline network is qualified based on the absolute value of the slope of the detection cycle-actual heat loss curve in the current detection cycle.

[0015] Furthermore, the process of determining whether the heating supply of the pipeline network is qualified based on the absolute value of the slope of the detection cycle-actual heat loss curve in the current detection cycle includes: comparing the absolute value of the slope of the curve in the current detection cycle with a preset absolute value; if the absolute value is greater than the preset absolute value, determining whether the heating supply of the pipeline network is qualified based on the slope; if the absolute value is less than or equal to the preset absolute value, determining that the ambient temperature is lower than the preset standard, and correcting the preset heat loss difference based on the difference between the absolute value and the preset absolute value.

[0016] Furthermore, the process of determining whether the heating supply of the pipeline network is qualified based on the slope includes: comparing the slope with a preset slope; if the slope is less than or equal to the preset slope, issuing a notification to verify the data acquisition and heat loss calculation process; if the slope is greater than the preset slope, then reducing the valve adjustment cycle of the pipeline network based on the difference between the average value of the actual heat loss and the average value of the estimated heat loss over several historical detection cycles, and the difference is proportional to the reduction in the valve adjustment cycle.

[0017] Furthermore, the process of correcting the preset heat loss difference based on the difference between the absolute value and the preset absolute value includes: increasing the preset heat loss difference based on the difference between the absolute value and the preset absolute value, and the difference is proportional to the increase of the preset heat loss difference.

[0018] Furthermore, the process of determining the reason for the unqualified heating supply of the pipeline network based on the average value of the temperature of each node of the pipeline network in the current detection cycle includes: comparing the average value with the preset temperature; if the average value is greater than the preset temperature, correcting the estimated heat loss based on the average spacing distance between each pipe in the pipeline network; if the average value is less than or equal to the preset temperature, counting the number of abnormal nodes, and determining the reason for the unqualified heating supply of the pipeline network based on the ratio of the number of abnormal nodes to the total number of nodes.

[0019] Furthermore, the process of correcting the estimated heat loss based on the average spacing distance between the pipes in the pipe network includes: increasing the estimated heat loss based on the spacing distance between the pipes in the pipe network, and the spacing distance is proportional to the increase in the estimated heat loss.

[0020] Furthermore, the process of determining the reason for the unqualified heating of the pipeline network based on the ratio of the number of abnormal nodes to the total number of nodes includes: comparing the ratio with a preset ratio; if the ratio is greater than the preset ratio, it is determined that the ambient temperature is lower than the preset standard, and the preset heat loss difference is corrected based on the difference between the absolute value and the preset absolute value; if the ratio is less than or equal to the preset ratio, it is determined that a problem occurs at the abnormal node, the abnormal node is located, and a pipeline maintenance notice is issued.

[0021] To achieve the above-mentioned object, the present invention provides a heat supply optimization system based on the pipe network transmission capacity, which is characterized by comprising:

[0022] A temperature acquisition unit, which is used to acquire the temperature at several nodes of the pipe network based on several temperature sensors installed in the pipe network;

[0023] A flow acquisition unit, configured to acquire flow rates at a plurality of nodes of the pipe network based on a plurality of flow meters installed in the pipe network;

[0024] a heat loss estimating unit connected to the temperature acquiring unit, for calculating the heat loss of each of the pipe networks based on a steady-state heat dissipation formula, and calculating an average of multiple heat losses to obtain an estimated heat loss;

[0025] a heat loss calculation unit, connected to the temperature acquisition unit and the flow acquisition unit, respectively, for calculating the actual heat loss of the pipe network based on the temperature difference between the supply water and the return water of the pipe network and the average flow rate, wherein the average flow rate is the average value of the flow rates of several nodes in the pipe network;

[0026] an analysis unit, connected to the heat loss estimation unit and the heat loss calculation unit, respectively, for determining whether the heat supply of the pipe network is qualified based on the difference between the actual heat loss and the estimated heat loss, and generating a corresponding treatment method based on the reason for the unqualified condition if the condition is unqualified, wherein the treatment method includes correcting the estimated heat loss, correcting the heat loss difference, and issuing a pipe network maintenance notice;

[0027] A control unit is connected to the analysis unit and is used to make adjustments based on the corresponding processing method.

[0028] Compared with the prior art, the beneficial effect of the present invention is that the method can more accurately grasp the current transportation situation of the pipeline network by installing several temperature sensors and flow meters in the pipeline network to detect the temperature and flow at several nodes of the pipeline network; at the same time, the estimated heat loss and actual heat loss are calculated using the acquired temperature and flow, and the difference between the estimated heat loss and the actual heat loss is used to determine whether the heating supply of the pipeline network is qualified. It can more quickly determine whether the heating supply of the pipeline network is qualified, and if it is unqualified, correct the estimated heat loss or correct the heat loss difference or issue a pipeline maintenance notice. It can perform targeted optimization of the pipeline network to ensure that the heat loss values of different pipeline networks during operation are within a preset range, thereby improving the working efficiency of the heating pipeline network.

[0029] Furthermore, the present invention determines whether the heating supply of the pipeline network is qualified by the difference between the actual heat loss and the estimated heat loss, which can quickly determine whether the heating supply of the pipeline network is qualified, thereby more effectively optimizing the pipeline network in a targeted manner.

[0030] Furthermore, the present invention determines whether the heating supply of the pipeline network is qualified by the variance of the historical difference, and can more accurately determine whether the heating supply of the pipeline network is qualified based on the historical heat loss situation, so that subsequent optimization is more targeted when it is unqualified, to ensure that the heat loss values of different pipelines during operation are within a preset range, thereby further improving the working efficiency of the heating pipeline network.

[0031] Furthermore, the present invention determines whether the heating supply of the pipeline network is qualified by the absolute value of the slope of the detection cycle-actual heat loss curve in the current detection cycle. It can combine the actual heat loss of the historical detection cycle with the degree of change of the actual heat loss of the current detection cycle, so as to more accurately determine whether the heating supply of the pipeline network is qualified, and determine the reason for the unqualified heating supply of the pipeline network, so as to make subsequent optimization more targeted when it is unqualified, thereby further improving the working efficiency of the heating supply of the pipeline network.

[0032] Furthermore, the present invention generates a corresponding processing method by comparing the slope of the curve in the current detection cycle with the preset slope, which can enable subsequent more targeted optimization of the pipeline network to ensure that the heat loss values of different pipeline networks during operation are within a preset range, thereby further improving the working efficiency of the heating pipeline network.

[0033] Furthermore, the present invention corrects the preset heat loss difference by the difference between the absolute value and the preset absolute value, and can correct the preset heat loss difference corresponding to different ambient temperatures, so that the preset heat loss difference can be adjusted more accurately, so that the subsequent determination of whether the heating is qualified can be more accurately made.

[0034] Furthermore, the present invention determines the reason for the unqualified heating of the pipeline network through the average temperature of each node of the pipeline network in the current detection cycle and the preset temperature. It can determine the reason for the unqualified heating of the pipeline network based on the temperature conditions of different nodes in the pipeline network, so that subsequent adjustments can be made more accurately based on the cause, thereby further improving the working efficiency of the pipeline network heating.

[0035] Furthermore, the present invention corrects the estimated heat loss by the average spacing distance between the pipes in the pipeline network, and can adjust the estimated heat loss based on the different layouts of the pipeline network, so as to more accurately determine whether the heating supply of the pipeline network is qualified, so that subsequent adjustments can be made more accurately based on the reasons for unqualified conditions, thereby further improving the working efficiency of the pipeline network heating.

[0036] Furthermore, the present invention determines the cause of the failure of the pipeline network by the ratio of abnormal nodes in the pipeline network to the total number of nodes, which can more accurately determine the cause of the failure of the pipeline network heating, so that subsequent adjustments based on the cause of the failure can be made more accurately, thereby further improving the working efficiency of the pipeline network heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1Schematic diagram of the structure of a heat supply optimization system based on pipeline network transportation capacity according to an embodiment of the present invention;

[0038] Figure 2 This is a flowchart of the steps of a heat supply optimization method based on pipeline network transportation capacity according to an embodiment of the present invention;

[0039] Figure 3 A flowchart of the steps for determining heat loss based on the comparison result of the difference between the actual heat loss and the estimated heat loss and the pre-stored preset heat loss difference according to an embodiment of the present invention;

[0040] Figure 4 This is a flowchart of the steps of determining the temperature of each node in the pipe network based on the comparison result of the average value of the temperature in the current detection cycle and the preset temperature in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0042] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0043] It should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0044] See also Figure 1 As shown, it is a structural diagram of a heat supply optimization system based on the pipeline network transportation capacity according to an embodiment of the present invention.

[0045] The system includes a temperature acquisition unit, a flow acquisition unit, a heat loss estimation unit, a heat loss calculation unit, an analysis unit and a control unit.

[0046] The temperature acquisition unit is used to acquire the temperatures at several nodes of the pipe network based on several temperature sensors installed in the pipe network;

[0047] The flow acquisition unit is used to acquire the flow at several nodes of the pipe network based on several flow meters installed in the pipe network;

[0048] The heat loss estimation unit is connected to the temperature acquisition unit, and is used to calculate the heat loss of each pipe network based on a steady-state heat dissipation formula, and calculate the average value of multiple heat losses to obtain an estimated heat loss;

[0049] The heat loss calculation unit is connected to the temperature acquisition unit and the flow acquisition unit respectively, and is used to calculate the actual heat loss of the pipeline network based on the temperature difference between the supply water and the return water of the pipeline network and the average flow rate, wherein the average flow rate is the average value of the flow rates of several nodes in the pipeline network;

[0050] The analysis unit is connected to the heat loss estimation unit and the heat loss calculation unit respectively, and is used to determine whether the heat supply of the pipeline network is qualified based on the difference between the actual heat loss and the estimated heat loss, and generate a corresponding treatment method based on the reason for the unqualified condition if the condition is unqualified, wherein the treatment method includes correcting the estimated heat loss, correcting the heat loss difference, and issuing a pipeline network maintenance notice;

[0051] The control unit is connected to the analysis unit and is used for making adjustments based on the corresponding processing method.

[0052] Specifically, in this embodiment, the steady-state heat dissipation formula in the heat loss estimation unit is as follows:

[0053]

[0054] Where Q is the heat loss per unit time, λ is the thermal conductivity of the insulation layer, L is the length of the pipeline, T 内 is the temperature of the medium in the tube, T 外 is the ambient temperature, D 外 is the outer diameter of the pipe, and δ is the thickness of the insulation layer.

[0055] Specifically, in this embodiment, the calculation formula for the actual loss in the heat loss calculation unit is as follows:

[0056] P loss =ρ·c·Q·ΔT

[0057] Where ρ is the fluid density, c is the specific heat capacity, ΔT is the supply and return water temperature difference, and Q is the flow rate.

[0058] See also Figure 2 As shown, it is a flow chart of the steps of the heat supply optimization method based on the pipeline network transportation capacity according to an embodiment of the present invention.

[0059] The steps in the actual operation process of the system of the embodiment of the present invention include:

[0060] S1, obtaining the temperatures at several nodes of the pipe network by the temperature obtaining unit based on several temperature sensors installed in the pipe network;

[0061] S2, obtaining, by the flow acquisition unit, flow rates at several nodes of the pipe network based on several flow meters installed in the pipe network;

[0062] S3, calculating the heat loss of each of the pipe networks based on a steady-state heat dissipation formula by the heat loss estimating unit connected to the temperature acquiring unit, and calculating an average of multiple heat losses to obtain an estimated heat loss;

[0063] S4, calculating the actual heat loss of the pipe network based on the temperature difference between the supply water and the return water and the average flow rate of the pipe network by the heat loss calculation unit connected to the temperature acquisition unit and the flow acquisition unit respectively, wherein the average flow rate is the average of the flow rates of several nodes in the pipe network;

[0064] S5, determining whether the heat supply of the pipe network is qualified based on the difference between the actual heat loss and the estimated heat loss by the analysis unit respectively connected to the heat loss estimation unit and the heat loss calculation unit, and generating a corresponding treatment method based on the reason for the failure if the heat supply of the pipe network is unqualified, wherein the treatment method includes correcting the estimated heat loss, correcting the heat loss difference, and issuing a pipe network maintenance notice;

[0065] S6, performing adjustment based on the corresponding processing method by the control unit connected to the analysis unit.

[0066] See also Figure 3 As shown, it is a flowchart of the steps of judging based on the comparison result of the difference between the actual heat loss and the estimated heat loss and the pre-stored preset heat loss difference in an embodiment of the present invention. The process of judging whether the heat supply of the pipeline network is qualified based on the difference between the actual heat loss and the estimated heat loss in an embodiment of the present invention includes: calculating the difference between the actual heat loss and the estimated heat loss; judging whether the heat supply of the pipeline network is qualified based on the comparison result of the difference with the pre-stored preset heat loss difference; if the difference is less than or equal to the first preset heat loss difference, judging that the heat supply of the pipeline network is qualified; if the difference is greater than the first preset heat loss difference and less than the second preset heat loss difference, obtaining the historical difference, and judging whether the heat supply of the pipeline network is qualified based on the variance of the historical difference; if the difference is greater than or equal to the second preset heat loss difference, judging that the heat supply of the pipeline network is unqualified, and determining the reason for the unqualified heat supply of the pipeline network based on the average value of the temperature of each node of the pipeline network in the current detection period.

[0067] Specifically, in this embodiment, taking the water temperature in the directly buried hot water pipe as 80°C as an example, the difference LO can be divided into a first preset heat loss difference L1 and a second preset ratio L2. The first preset heat loss difference L1 in the preset heat loss difference standard is set to be 3W / m, and the second preset heat loss difference L2 is set to be 10W / m. It should be noted that in other embodiments, the values of L1 and L2 can also be determined according to the relative heating demand; the comparison process based on the difference L and L1 and L2 is as follows:

[0068] If the difference L is less than or equal to the first preset heat loss difference L1, it is determined that the heat supply of the pipe network is qualified;

[0069] If the difference L is greater than the first preset heat loss difference L1 and less than the second preset heat loss difference L2, it means that it is impossible to determine whether other factors cause this result at this time, then the historical difference is obtained according to the historical situation, and the heat supply of the pipeline network is determined to be qualified based on the variance P of the historical difference;

[0070] If the difference L is greater than or equal to the second preset heat loss difference L2, it is determined that the heating supply of the pipeline network is unqualified, and the reason for the unqualified heating supply of the pipeline network is determined based on the average temperature Q of each node of the pipeline network in the current detection cycle.

[0071] Specifically, the process of determining whether the heating supply of the pipeline network is qualified based on the variance of historical difference values in an embodiment of the present invention includes: calculating the variance of the historical difference values; comparing the variance with a preset variance; if the variance is less than or equal to the preset variance, determining that the heating supply of the pipeline network is unqualified, and determining the reason for the unqualified heating supply of the pipeline network based on the average value of the temperature of each node of the pipeline network in the current detection cycle; if the variance is greater than the preset variance, drawing a detection cycle-actual heat loss curve, and determining whether the heating supply of the pipeline network is qualified based on the absolute value of the slope of the detection cycle-actual heat loss curve in the current detection cycle.

[0072] Specifically, in this embodiment, the preset variance P0=0.98, and the comparison process of the variance P based on the historical difference value and the preset variance P0 is as follows:

[0073] If the variance P is less than or equal to the preset variance P0, it indicates that the historical heat loss difference has a low dispersion, and the heating supply of the pipe network is determined to be unqualified. Then, the reason for the unqualified heating supply of the pipe network is determined based on the average value Q of the temperature of each node in the pipe network in the current detection cycle;

[0074] If the variance P is greater than the preset variance P0, indicating that the historical heat loss difference is relatively discrete, a detection cycle-actual heat loss curve is drawn, and based on the absolute value R of the slope of the detection cycle-actual heat loss curve in the current detection cycle, it is determined whether the heating supply of the pipeline network is qualified.

[0075] Specifically, the process of determining whether the heating supply of the pipeline network is qualified based on the absolute value of the slope of the detection cycle-actual heat loss curve in the current detection cycle in an embodiment of the present invention includes: comparing the absolute value of the slope of the curve in the current detection cycle with a preset absolute value; if the absolute value is greater than the preset absolute value, determining whether the heating supply of the pipeline network is qualified based on the slope; if the absolute value is less than or equal to the preset absolute value, determining that the ambient temperature is lower than the preset standard, and correcting the preset heat loss difference based on the difference between the absolute value and the preset absolute value.

[0076] Specifically, in this embodiment, the preset absolute value R0=0.97, and the comparison process based on the absolute value R of the slope of the curve in the current detection cycle and the preset absolute value R0 is as follows:

[0077] If the absolute value R is greater than the preset absolute value R0, it means that it is not possible to determine whether other factors lead to this result, and then the heat supply of the pipe network is determined to be qualified based on the slope T;

[0078] If the absolute value R is less than or equal to the preset absolute value R0, it is determined that the ambient temperature is lower than the preset standard, and the preset heat loss difference is corrected based on the difference U between the absolute value and the preset absolute value.

[0079] Specifically, the process of determining whether the heating supply of the pipeline network is qualified based on the slope in an embodiment of the present invention includes: comparing the slope with a preset slope; if the slope is less than or equal to the preset slope, issuing a notification to verify the data acquisition and heat loss calculation process; if the slope is greater than the preset slope, reducing the valve adjustment cycle of the pipeline network based on the difference between the average value of the actual heat loss and the average value of the estimated heat loss over several historical detection cycles, and the difference is proportional to the reduction in the valve adjustment cycle.

[0080] Specifically, in this embodiment, the preset slope T0=0, and the comparison process based on the slope T and the preset slope T0 is as follows:

[0081] If the slope T is less than or equal to the preset slope T0, a notification is issued to verify the data acquisition and heat loss calculation process;

[0082] If the slope T is greater than the preset slope T0, the valve adjustment cycle of the pipeline network is reduced based on the difference V between the average value of the actual heat loss and the average value of the estimated heat loss in several historical detection cycles, and the difference is proportional to the reduction amplitude of the valve adjustment cycle.

[0083] Specifically, in this embodiment, the preset difference V0 between the average value of the actual heat loss and the average value of the estimated heat loss is 7 W / m. The comparison process of the difference V between the average value of the actual heat loss and the average value of the estimated heat loss based on several historical detection cycles and the preset difference V0 is as follows:

[0084] If the difference V is less than or equal to the preset difference V0, the valve adjustment period is adjusted to 0.9 times the original valve adjustment period;

[0085] If the difference V is greater than the preset difference V0, the valve adjustment period is adjusted to 0.7 times the original valve adjustment period.

[0086] Specifically, the process of correcting the preset heat loss difference based on the difference between the absolute value and the preset absolute value in an embodiment of the present invention includes: increasing the preset heat loss difference based on the difference between the absolute value and the preset absolute value, and the difference is proportional to the increase in the preset heat loss difference.

[0087] Specifically, in this embodiment, the preset difference U0 between the absolute value and the preset absolute value is 0.2, and the comparison process based on the difference U between the absolute value and the preset absolute value and the preset difference U0 is as follows:

[0088] If the difference U is less than or equal to the preset difference U0, the preset heat loss difference is adjusted to 1.2 times the original value;

[0089] If the difference U is greater than the preset difference U0, the preset heat loss difference is adjusted to 1.8 times the original value.

[0090] See also Figure 4 As shown, it is a flowchart of the steps of determining the reason for the unqualified heating supply of the pipeline network based on the comparison result of the average temperature of each node in the pipeline network in the current detection cycle and the preset temperature in an embodiment of the present invention. The process of the embodiment of the present invention for determining the reason for the unqualified heating supply of the pipeline network based on the average temperature of each node in the pipeline network in the current detection cycle includes: comparing the average value with the preset temperature; if the average value is greater than the preset temperature, correcting the estimated heat loss based on the average spacing distance between each pipe in the pipeline network; if the average value is less than or equal to the preset temperature, counting the number of abnormal nodes, and determining the reason for the unqualified heating supply of the pipeline network based on the ratio of the number of abnormal nodes to the total number of nodes.

[0091] Specifically, in this embodiment, the preset temperature Q0=60°C, and the comparison process of the average value Q of the temperature of each node in the pipe network in the current detection cycle and the preset temperature Q0 is as follows:

[0092] If the average value Q is greater than the preset temperature Q0, it indicates that the distance between the pipes in the pipe network is relatively far, resulting in faster heat dissipation, and the estimated heat loss is corrected based on the average distance M between the pipes in the pipe network;

[0093] If the average value Q is less than or equal to the preset temperature Q0, it indicates that there may be a leakage point in the pipeline network. Then, the number of abnormal nodes is counted, and the reason for the unqualified heating of the pipeline network is determined based on the ratio W of the number of abnormal nodes to the total number of nodes.

[0094] Specifically, the process of correcting the estimated heat loss based on the average spacing distance between the pipes in the pipe network in an embodiment of the present invention includes: increasing the estimated heat loss based on the average spacing distance between the pipes in the pipe network, and the average spacing distance is proportional to the increase in the estimated heat loss.

[0095] Specifically, in this embodiment, the preset spacing distance M0=1.2m, and the comparison process based on the average spacing distance M between the pipes in the pipe network and the preset spacing distance is as follows:

[0096] If the average spacing distance M is less than or equal to the preset spacing distance, the estimated heat loss is adjusted to 1.3 times the original estimated heat loss;

[0097] If the average spacing distance M is greater than the preset spacing distance, the estimated heat loss is adjusted to 1.8 times the original estimated heat loss.

[0098] Specifically, the process of determining the reason for the unqualified heating of the pipeline network based on the ratio of the number of abnormal nodes to the total number of nodes in an embodiment of the present invention includes: comparing the ratio with a preset ratio; if the ratio is greater than the preset ratio, it is determined that the ambient temperature is lower than the preset standard, and the preset heat loss difference is corrected based on the difference between the absolute value and the preset absolute value; if the ratio is less than or equal to the preset ratio, it is determined that a problem occurs at the abnormal node, the abnormal node is located, and a pipeline maintenance notice is issued.

[0099] Specifically, in this embodiment, the preset ratio W0=0.7, and the comparison process based on the ratio W and the preset ratio W0 is as follows:

[0100] If the ratio W is greater than the preset ratio W0, it indicates that the temperature in the pipe network is low and the ambient temperature is determined to be lower than the preset standard, and the preset heat loss difference is corrected based on the difference between the absolute value and the preset absolute value;

[0101] If the ratio W is less than or equal to the preset ratio W0, it indicates that leakage or other problems occur at abnormal nodes in the pipe network. The abnormal nodes are then located and a pipe network maintenance notice is issued.

[0102] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

[0103] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A heat supply optimization method based on pipeline network transportation capacity, characterized in that: include: Obtain the temperature at several nodes of the pipe network based on several temperature sensors installed in the pipe network; Obtaining flow rates at a plurality of nodes of the pipe network based on a plurality of flow meters installed in the pipe network; Calculating the heat loss of each pipe network based on a steady-state heat dissipation formula, and calculating an average of multiple heat losses to obtain an estimated heat loss; Calculating the actual heat loss of the pipe network based on the temperature difference between the supply water and the return water and the average flow rate of the pipe network, wherein the average flow rate is the average of the flow rates of several nodes in the pipe network; Determining whether the heat supply of the pipe network is qualified based on the difference between the actual heat loss and the estimated heat loss, and generating a corresponding treatment method based on the reason for the failure if the heat supply is unqualified, wherein the treatment method includes correcting the estimated heat loss, correcting the preset heat loss difference, and issuing a pipe network maintenance notice; Adjustments are made based on the corresponding processing methods.

2. The heat supply optimization method based on pipeline network transportation capacity according to claim 1 is characterized in that: The process of determining whether the heat supply of the pipe network is qualified based on the difference between the actual heat loss and the estimated heat loss includes: calculating a difference between the actual heat loss and the estimated heat loss; Determining whether the heat supply of the pipe network is qualified based on a comparison result of the difference with a pre-stored preset heat loss difference; If the difference is less than or equal to a first preset heat loss difference, it is determined that the heat supply of the pipe network is qualified; If the difference is greater than the first preset heat loss difference and less than the second preset heat loss difference, obtaining historical differences, and determining whether the heat supply of the pipe network is qualified based on the variance of the historical differences; If the difference is greater than or equal to the second preset heat loss difference, it is determined that the heating supply of the pipeline network is unqualified, and the reason for the unqualified heating supply of the pipeline network is determined based on the average temperature of each node of the pipeline network in the current detection cycle.

3. The heat supply optimization method based on pipeline network transportation capacity according to claim 2 is characterized in that: The process of determining whether the heat supply of the pipe network is qualified based on the variance of the historical difference includes: Calculating the variance of the historical difference; comparing the variance with a preset variance; If the variance is less than or equal to the preset variance, it is determined that the heat supply of the pipe network is unqualified, and the reason for the unqualified heat supply of the pipe network is determined based on the average value of the temperature of each node of the pipe network in the current detection cycle; If the variance is greater than the preset variance, a detection cycle-actual heat loss curve is drawn, and whether the heat supply of the pipe network is qualified is determined based on the absolute value of the slope of the detection cycle-actual heat loss curve in the current detection cycle.

4. The heat supply optimization method based on pipeline network transportation capacity according to claim 3 is characterized in that: The process of determining whether the heat supply of the pipe network is qualified based on the absolute value of the slope of the detection cycle-actual heat loss curve in the current detection cycle includes: Comparing the absolute value of the slope of the curve in the current detection period with a preset absolute value; If the absolute value is greater than the preset absolute value, determining whether the heat supply of the pipe network is qualified based on the slope; If the absolute value is less than or equal to the preset absolute value, it is determined that the ambient temperature is lower than the preset standard, and the preset heat loss difference is corrected based on the difference between the absolute value and the preset absolute value.

5. The heat supply optimization method based on pipeline network transportation capacity according to claim 4 is characterized in that: The process of determining whether the heat supply of the pipe network is qualified based on the slope includes: comparing the slope with a preset slope; If the slope is less than or equal to the preset slope, issuing a notification to verify the data acquisition and heat loss calculation process; If the slope is greater than the preset slope, the valve adjustment cycle of the pipeline network is reduced based on the difference between the average value of the actual heat loss and the average value of the estimated heat loss in several historical detection cycles, and the difference is proportional to the reduction amplitude of the valve adjustment cycle.

6. The heat supply optimization method based on pipeline network transportation capacity according to claim 4 is characterized in that: The process of correcting the preset heat loss difference based on the difference between the absolute value and the preset absolute value includes: The preset heat loss difference is increased based on the difference between the absolute value and the preset absolute value, and the difference is proportional to the increase of the preset heat loss difference.

7. The heat supply optimization method based on pipeline network transportation capacity according to claim 2, characterized in that: The process of determining the reason for the heat supply failure of the pipe network based on the average temperature of each node in the pipe network during the current detection period includes: comparing the average value with the preset temperature; If the average value is greater than the predetermined temperature, then correcting the estimated heat loss based on the average spacing between pipes in the pipe network; If the average value is less than or equal to the preset temperature, the number of abnormal nodes is counted, and the reason why the heating supply of the pipe network is unqualified is determined based on the ratio of the number of abnormal nodes to the total number of nodes.

8. The heat supply optimization method based on pipeline network transportation capacity according to claim 7, characterized in that: The process of correcting the estimated heat loss based on the average spacing between pipes in the pipe network includes: The estimated heat loss is increased based on an average spacing distance between pipes in the pipe network, and the average spacing distance is proportional to the increase in the estimated heat loss.

9. The heat supply optimization method based on pipeline network transportation capacity according to claim 7, characterized in that: The process of determining the reason why the heat supply of the pipe network is unqualified based on the ratio of the number of abnormal nodes to the total number of nodes includes: comparing the ratio with a preset ratio; If the ratio is greater than the preset ratio, it is determined that the ambient temperature is lower than the preset standard, and the preset heat loss difference is corrected based on the difference between the absolute value and the preset absolute value; If the ratio is less than or equal to the preset ratio, it is determined that a problem occurs at the abnormal node, the abnormal node is located, and a pipe network maintenance notice is issued.

10. A heat supply optimization system based on pipeline network transportation capacity, characterized in that: include: A temperature acquisition unit, which is used to acquire the temperature at several nodes of the pipe network based on several temperature sensors installed in the pipe network; A flow acquisition unit, configured to acquire flow rates at a plurality of nodes of the pipe network based on a plurality of flow meters installed in the pipe network; a heat loss estimating unit connected to the temperature acquiring unit, for calculating the heat loss of each of the pipe networks based on a steady-state heat dissipation formula, and calculating an average of multiple heat losses to obtain an estimated heat loss; a heat loss calculation unit, connected to the temperature acquisition unit and the flow acquisition unit, respectively, for calculating the actual heat loss of the pipe network based on the temperature difference between the supply water and the return water of the pipe network and the average flow rate, wherein the average flow rate is the average value of the flow rates of several nodes in the pipe network; an analysis unit, connected to the heat loss estimation unit and the heat loss calculation unit, respectively, for determining whether the heat supply of the pipe network is qualified based on the difference between the actual heat loss and the estimated heat loss, and generating a corresponding treatment method based on the reason for the unqualified condition if the condition is unqualified, wherein the treatment method includes correcting the estimated heat loss, correcting the heat loss difference, and issuing a pipe network maintenance notice; A control unit is connected to the analysis unit and is used to make adjustments based on the corresponding processing method.

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