Pipe network heat storage control method, device, equipment, medium and product

Abstract

The invention discloses a pipe network heat storage control method, device and equipment, a medium and a product. The pipe network heat storage control method comprises the steps that a first mathematical model among the maximum heat storage capacity, duration and water supply temperature of a secondary pipe network is established; based on the current water supply temperature of the secondary pipe network and the first mathematical model, the maximum heat storage duration of the secondary pipe network is determined; establishing a second mathematical model among the maximum heat storage capacity of the user, the duration and the water supply temperature; based on the current secondary pipe network water supply temperature and the second mathematical model, the maximum indoor heat storage duration of the user is determined; and on the basis of the maximum duration of heat storage of the secondary pipe network, the maximum duration of indoor heat storage of the user and the valley electricity price time period, the optimal heat storage starting time of the valley electricity price time period is determined, so that the secondary pipe network starts heat storage at the optimal heat storage starting time. By the adoption of the scheme, the problems that how to enable residents to obtain more comfortable heating experience and how to effectively reduce energy consumption and heating cost are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of centralized heating systems, and in particular to a pipe network heat storage control method, device, equipment, medium and product. Background Art

[0002] like Figure 1 As shown, the central heating system generally includes a circulating fan 1, a heat storage body 2, a heat exchanger 3, a primary pipe network 4, a secondary pipe network 5 and a user end 6. The circulating fan 1 is used for air circulation. The heat storage body 2 is used to store heat so that it can be released when needed. The heat exchanger 3 is used to transfer heat energy from the primary pipe network 4 to the secondary pipe network 5 and to transfer heat energy to water or air at the user end 6. The primary pipe network 4 is the main thermal pipeline in the heating system, responsible for transporting heat energy from the heat source to each heat exchanger 3 or the user end 6. The secondary pipe network 5 is responsible for transporting the heat energy processed by the heat exchanger 3 to the user end 6. The secondary pipe network 5 usually transports water with a lower temperature to meet the needs of the user. The user end 6 is the ultimate beneficiary of the central heating system. It receives heat energy through the secondary pipe network 5, and the user is heated or supplied with hot water.

[0003] In the centralized heating system, the secondary pipe network 5 has a long transmission distance and a complex topological structure. A large amount of circulating water is stored inside the secondary pipe network 5, which has a certain heat storage capacity. The heat storage body 2 can adjust the heat storage capacity of the secondary pipe network 5 by adjusting the primary water supply temperature to control the water supply temperature of the secondary pipe network 5. How to make full use of the heat storage capacity of the secondary pipe network 5 and cooperate with the heat storage body 2 to provide appropriate warmth in different time periods, while making the residents have a more comfortable heating experience, effectively reducing energy consumption and heating costs, is an urgent problem to be solved. Summary of the invention

[0004] The present invention provides a pipe network heat storage control method, device, equipment, medium and product to solve the problem of how to make occupants have a more comfortable heating experience while effectively reducing energy consumption and heating costs.

[0005] According to one aspect of the present invention, a pipe network heat storage control method is provided, the pipe network heat storage control method comprising:

[0006] Establish the first mathematical model between the maximum heat storage capacity, duration and water supply temperature of the secondary pipe network;

[0007] Determine the maximum heat storage time of the secondary pipe network based on the current secondary pipe network water supply temperature and the first mathematical model, wherein the maximum heat storage time of the secondary pipe network is the time required for the secondary pipe network to reach the maximum heat storage at the current secondary pipe network water supply temperature;

[0008] Establishing a second mathematical model between the user's maximum heat storage capacity, duration and water supply temperature;

[0009] Determine the maximum indoor heat storage time of the user based on the current secondary pipe network water supply temperature and the second mathematical model, wherein the maximum indoor heat storage time of the user is the time required for the user's indoor heat storage to reach the maximum value at the current secondary pipe network water supply temperature;

[0010] Based on the maximum heat storage time of the secondary pipe network, the maximum indoor heat storage time of the user and the valley electricity price period, the optimal heat storage start time of the valley electricity price period is determined so that the secondary pipe network starts to store heat at the optimal heat storage start time.

[0011] In an optional embodiment of the present invention, the first mathematical model includes a secondary pipe network temperature rise delay hysteresis time model and a secondary pipe network return water temperature model; accordingly, determining the maximum heat storage time of the secondary pipe network based on the current secondary pipe network water supply temperature and the first mathematical model includes:

[0012] Determining the secondary pipe network temperature rise delay lag time based on the secondary pipe network temperature rise delay lag time model;

[0013] Determine the secondary pipe network return water temperature recovery time based on the current secondary pipe network supply water temperature and the secondary pipe network return water temperature model;

[0014] The sum of the secondary pipe network temperature rise delay lag time and the secondary pipe network return water temperature recovery time is determined as the maximum heat storage time of the secondary pipe network.

[0015] In an optional embodiment of the present invention, the secondary pipe network temperature rise delay lag time model includes a first formula, which is:

[0016] Among them, t C is the delay time of temperature rise of secondary pipe network, m s is the circulating water flow of the secondary pipe network, j is the number of pipe sections in the secondary pipe network, D i is the diameter of the i-th section of the secondary pipe network, and L is the total length of the secondary pipe network;

[0017] Correspondingly, determining the secondary pipe network temperature rise delay lag time based on the secondary pipe network temperature rise delay lag time model includes:

[0018] The secondary pipe network temperature rise delay lag time is calculated using the first formula.

[0019] In an optional embodiment of the present invention, the secondary pipe network return water temperature model includes a second formula, and the second formula is:

[0020] Among them, t h is the secondary pipe network return water temperature recovery time; m s is the circulating water flow of the secondary pipe network; Tg is the water supply temperature of the secondary pipe network; T h is the return water temperature of the secondary pipe network; a is the heat dissipation coefficient, T in is the indoor temperature, Q S2 C is the non-indoor heating and heat dissipation loss load of the secondary pipe network; s is the specific heat capacity of the secondary pipe network circulation;

[0021] Accordingly, the determining of the secondary pipe network return water temperature recovery time based on the current secondary pipe network supply water temperature and the secondary pipe network return water temperature model includes:

[0022] The current secondary pipe network water supply temperature is substituted into the second formula as the secondary pipe network water supply temperature to obtain the secondary pipe network return water temperature recovery time.

[0023] In an optional embodiment of the present invention, the second mathematical model includes a third formula, and the third formula is:

[0024]

[0025] Among them, T in is the indoor temperature, t in is the maximum indoor heat storage time of the user, ρ a is the indoor air density, C a is the specific heat capacity of air, F is the heating area, h a is the average indoor height of the heating area, T g is the secondary pipe network water supply temperature, T h is the return water temperature of the secondary pipe network, F1 is the building maintenance structure area, γ is the heat transfer coefficient from the building maintenance structure to the outdoors, T o is the outdoor temperature, F2 is the area of ​​the building receiving solar radiation, η is the solar radiation intensity absorption rate of the building maintenance structure, H t is the solar radiation intensity;

[0026] Accordingly, the method of determining the maximum indoor heat storage time of the user based on the current secondary pipe network water supply temperature and the second mathematical model includes:

[0027] The current secondary pipe network water supply temperature is substituted into the third formula as the secondary pipe network water supply temperature to obtain the maximum indoor heat storage time of the user.

[0028] In an optional embodiment of the present invention, determining the optimal heat storage start time for the valley electricity price period based on the maximum heat storage time of the secondary pipe network, the maximum heat storage time of the user's indoor room and the valley electricity price period includes:

[0029] Determine the end time of the heat storage period based on the valley electricity price period;

[0030] When the time difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's room is greater than or equal to the upper limit threshold of the difference, the time before the end time of the heat storage period and the interval time from the end time of the heat storage period to the maximum heat storage time of the user's room is determined as the optimal heat storage start time;

[0031] When the difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's room is less than or equal to the lower limit threshold of the difference, the time before the end time of the heat storage period and the interval time from the end time of the heat storage period is the maximum heat storage time of the secondary pipe network is determined as the optimal heat storage start time, wherein the lower limit threshold of the difference is a negative number;

[0032] When the difference between the maximum heat storage time of the secondary pipe network and the maximum indoor heat storage time of the user is greater than the lower limit threshold of the difference and less than the upper limit threshold of the difference, and the maximum heat storage time of the secondary pipe network is less than or equal to the valley electricity price period, the moment that is before the end time of the heat storage period and the interval time with the end time of the heat storage period is the maximum heat storage time of the secondary pipe network is determined as the optimal heat storage start time.

[0033] In an optional embodiment of the present invention, after determining the maximum indoor heat storage time of the user based on the current secondary pipe network water supply temperature and the second mathematical model, the method further includes:

[0034] When the maximum heat storage time of the secondary pipe network or the maximum heat storage time of the user's indoor space is greater than the heat storage period, the current secondary pipe network water supply temperature is increased.

[0035] According to another aspect of the present invention, a pipe network heat storage control device is provided, the pipe network heat storage control device comprising:

[0036] A first model building module is used to establish a first mathematical model between the maximum heat storage capacity, duration and water supply temperature of the secondary pipe network;

[0037] A first duration determination module, configured to determine a maximum duration of heat storage in the secondary pipe network based on a current secondary pipe network water supply temperature and the first mathematical model, wherein the maximum duration of heat storage in the secondary pipe network is the duration required for the secondary pipe network to reach a maximum heat storage at the current secondary pipe network water supply temperature;

[0038] A second model building module is used to build a second mathematical model between the user's maximum heat storage capacity, duration and water supply temperature;

[0039] A second duration determination module is used to determine the maximum duration of indoor heat storage in the user based on the current secondary pipe network water supply temperature and the second mathematical model, wherein the maximum duration of indoor heat storage in the user is the duration required for the user's indoor heat storage to reach the maximum value at the current secondary pipe network water supply temperature;

[0040] The optimal heat storage determination module is used to determine the optimal heat storage start time of the valley electricity price period based on the maximum heat storage time of the secondary pipe network, the maximum indoor heat storage time of the user and the valley electricity price period, so that the secondary pipe network starts to store heat at the optimal heat storage start time.

[0041] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0042] at least one processor; and

[0043] a memory communicatively connected to the at least one processor; wherein,

[0044] The memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the pipeline network heat storage control method described in any embodiment of the present invention.

[0045] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the pipe network heat storage control method described in any embodiment of the present invention when executed.

[0046] According to another aspect of the present invention, a computer program product is provided. The computer program product includes a computer program. When the computer program is executed by a processor, the pipe network heat storage control method according to any embodiment of the present invention is implemented.

[0047] The technical solution of the embodiment of the present invention is to establish a first mathematical model between the maximum heat storage capacity, duration and water supply temperature of the secondary pipe network; determine the maximum heat storage duration of the secondary pipe network based on the current water supply temperature of the secondary pipe network and the first mathematical model, wherein the maximum heat storage duration of the secondary pipe network is the time required for the secondary pipe network to reach the maximum heat storage at the current water supply temperature of the secondary pipe network; establish a second mathematical model between the maximum heat storage capacity, duration and water supply temperature of the user; determine the maximum indoor heat storage duration of the user based on the current water supply temperature of the secondary pipe network and the second mathematical model, wherein the maximum indoor heat storage duration of the user is the time required for the user's indoor room to reach the maximum heat storage at the current water supply temperature of the secondary pipe network; determine the optimal heat storage start time of the valley electricity price period based on the maximum heat storage duration of the secondary pipe network, the maximum indoor heat storage duration of the user and the valley electricity price period, so that the secondary pipe network starts to store heat at the optimal heat storage start time. Thereby, the entire heating system can achieve the maximum heat storage during the valley electricity price period while reducing the heat dissipation loss of the entire system during the heat storage process. It solves the problem of how to provide residents with a more comfortable heating experience while effectively reducing energy consumption and heating costs.

[0048] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0050] Figure 1 It is a structural block diagram of a central heating system in the related art;

[0051] Figure 2 is a flow chart of a pipe network heat storage control method provided according to Embodiment 1 of the present invention;

[0052] Figure 3 The step is a flowchart of determining the maximum heat storage time of the secondary pipe network based on the current secondary pipe network water supply temperature and the first mathematical model;

[0053] Figure 4 is a flow chart of a pipe network heat storage control method provided according to Embodiment 2 of the present invention;

[0054] Figure 5 is a structural schematic diagram of a pipe network heat storage control device provided according to Embodiment 3 of the present invention;

[0055] Figure 6 It is a structural schematic diagram of an electronic device for implementing the pipe network heat storage control method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0056] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0057] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0058] Embodiment 1

[0059] Figure 2 This is a flow chart of a pipe network heat storage control method provided in the first embodiment of the present invention. This embodiment can be applied to the heat storage control of a centralized heating system. The pipe network heat storage control method can be executed by a pipe network heat storage control device. The pipe network heat storage control device can be implemented in the form of hardware and / or software. The pipe network heat storage control device can be configured in a centralized heating system. Figure 2 As shown, the pipe network heat storage control method includes:

[0060] S110, establishing a first mathematical model between the maximum heat storage capacity, duration and water supply temperature of the secondary pipe network.

[0061] Among them, the maximum heat storage capacity of the secondary pipe network refers to the maximum amount of heat that the secondary pipe network can store under specific conditions. The duration here refers to the time required for the secondary pipe network to reach the maximum heat storage. The water supply temperature refers to the temperature of the water supply flowing to the secondary pipe network. The first mathematical model refers to a model that can describe the mathematical relationship between the three variables of the maximum heat storage capacity of the secondary pipe network, the heat storage duration, and the water supply temperature.

[0062] S120. Determine the maximum heat storage time of the secondary pipe network based on the current water supply temperature of the secondary pipe network and the first mathematical model.

[0063] Among them, the maximum heat storage time of the secondary pipe network is the time required for the secondary pipe network to reach the maximum heat storage at the current secondary pipe network water supply temperature.

[0064] The secondary pipe network water supply temperature is adjustable, and the current secondary pipe network water supply temperature refers to the water supply temperature of the secondary pipe network at the current moment. When the secondary pipe network water supply temperature is different, the maximum heat storage time of the secondary pipe network is different, so the maximum heat storage time of the secondary pipe network can be determined based on the current secondary pipe network water supply temperature and the first mathematical model.

[0065] S130: Establish a second mathematical model between the user's maximum heat storage capacity, duration, and water supply temperature.

[0066] Among them, the maximum heat storage capacity of the user refers to the maximum amount of heat that the heat storage system at the user end can store under specific conditions. The duration here refers to the time required for the user end to reach the maximum heat storage. The water supply temperature refers to the water supply temperature flowing to the secondary pipe network. The second mathematical model refers to the mathematical relationship between the three variables used to describe the maximum heat storage capacity, heat storage duration and water supply temperature of the user end heat storage system.

[0067] S140. Determine the maximum indoor heat storage time of the user based on the current secondary pipe network water supply temperature and the second mathematical model.

[0068] Among them, the maximum duration of indoor heat storage in the user is the duration required for the user's room to reach the maximum heat storage at the current secondary pipe network water supply temperature.

[0069] Among them, when the secondary pipe network water supply temperature is different, the maximum indoor heat storage time of the user is different, so the maximum indoor heat storage time of the user can be determined based on the current secondary pipe network water supply temperature and the second mathematical model.

[0070] S150, determining an optimal heat storage start time for the valley electricity price period based on the maximum heat storage time of the secondary pipe network, the maximum heat storage time of the user's indoor space, and the valley electricity price period, so that the secondary pipe network starts to store heat at the optimal heat storage start time.

[0071] The off-peak electricity price period refers to the period of time when the electricity price is relatively low every day in the power system. The optimal heat storage start time refers to the optimal time point for the secondary pipe network to start heat storage in order to meet the heat demand of the user end and ensure the efficient operation of the heat storage system.

[0072] The secondary pipe network is affected by the high ambient temperature. If it maintains the maximum allowable value for a long time during the off-peak electricity period, it will greatly increase the heat dissipation loss and cause energy waste. The most ideal way is to meet the heating needs of users until the off-peak electricity period ends and the secondary pipe network reaches the maximum allowable value. At this time, the secondary pipe network accumulates the most heat while reducing the heat dissipation loss of the pipes during the heat storage process.

[0073] The above scheme establishes a first mathematical model between the maximum heat storage capacity, duration and water supply temperature of the secondary pipe network; determines the maximum heat storage duration of the secondary pipe network based on the current water supply temperature of the secondary pipe network and the first mathematical model, wherein the maximum heat storage duration of the secondary pipe network is the time required for the secondary pipe network to reach the maximum heat storage at the current water supply temperature of the secondary pipe network; establishes a second mathematical model between the maximum heat storage capacity, duration and water supply temperature of the user; determines the maximum indoor heat storage duration of the user based on the current water supply temperature of the secondary pipe network and the second mathematical model, wherein the maximum indoor heat storage duration of the user is the time required for the user's indoor heat storage to reach the maximum heat storage at the current water supply temperature of the secondary pipe network; determines the optimal heat storage start time of the valley electricity price period based on the maximum heat storage duration of the secondary pipe network, the maximum indoor heat storage duration of the user and the valley electricity price period, so that the secondary pipe network starts to store heat at the optimal heat storage start time. Thereby, the entire heating system can achieve the maximum heat storage during the valley electricity price period while reducing the heat dissipation loss of the entire system during the heat storage process. It solves the problem of how to provide residents with a more comfortable heating experience while effectively reducing energy consumption and heating costs.

[0074] In an optional embodiment of the present invention, Figure 3 As shown, the first mathematical model includes a secondary pipe network temperature rise delay lag time model and a secondary pipe network return water temperature model; accordingly, the maximum heat storage time of the secondary pipe network is determined based on the current secondary pipe network water supply temperature and the first mathematical model, including:

[0075] S121. Determine the secondary pipe network temperature rise delay lag time based on the secondary pipe network temperature rise delay lag time model.

[0076] Among them, the secondary pipe network temperature rise delay lag time refers to the time required for the water supply temperature and return water temperature in the secondary pipe network to respond to the change and gradually reach a new stable state when the operating conditions of the heating system (such as heat source temperature, flow, etc.) change. During this period of time, the water temperature in the pipe network gradually rises or falls, but has not yet reached the final stable value. This time delay is mainly due to the fact that it takes a certain amount of time for water flow and heat transfer in the pipe network.

[0077] S122. Determine the secondary pipe network return water temperature recovery time based on the current secondary pipe network supply water temperature and the secondary pipe network return water temperature model.

[0078] Among them, during the operation of the heating system, if the return water temperature of the secondary pipe network drops due to some reasons (such as changes in external temperature, changes in user heat demand, etc.), the system needs a certain amount of time to restore the return water temperature to the set value or the expected level. This period of time is the secondary pipe network return water temperature recovery time. It reflects the response speed and regulation ability of the heating system to heat demand.

[0079] S123, determining the sum of the secondary pipe network temperature rise delay lag time and the secondary pipe network return water temperature recovery time as the secondary pipe network maximum heat storage time.

[0080] Among them, the maximum heat storage time reflects the maximum capacity of the secondary pipe network to store heat under specific conditions. This time length includes the time required for the water temperature to rise from the initial state to the maximum temperature (i.e., the temperature rise delay hysteresis time), and the time required for the return water temperature to return to the set value when the heat demand decreases (i.e., the return water temperature recovery time). Therefore, the sum of the secondary pipe network temperature rise delay hysteresis time and the secondary pipe network return water temperature recovery time can be determined as the maximum heat storage time of the secondary pipe network.

[0081] In an optional embodiment of the present invention, the secondary pipe network temperature rise delay lag time model includes a first formula, which is: Among them, t C is the delay time of temperature rise of secondary pipe network, in min; m s is the circulating water flow rate of the secondary pipe network, in kg / min; j is the number of pipe sections in the secondary pipe network; D i is the diameter of the i-th section of the secondary pipe network, in mm; L is the total length of the secondary pipe network, in m.

[0082] Correspondingly, determining the secondary pipe network temperature rise delay lag time based on the secondary pipe network temperature rise delay lag time model includes: calculating the secondary pipe network temperature rise delay lag time by the first formula. Since for a specific secondary pipe network, the secondary pipe network circulating water flow, the number of secondary pipe network sections, the diameter of the i-th section of the secondary pipe network, and the total length of the secondary pipe network are all known quantities that can be obtained, the secondary pipe network temperature rise delay lag time can be obtained by the formula.

[0083] In an optional embodiment of the present invention, the secondary pipe network return water temperature model includes a second formula, and the second formula is: Among them, t h is the secondary pipe network return water temperature recovery time, in min; m s is the circulating water flow rate of the secondary pipe network, in kg / min; T g is the water supply temperature of the secondary pipe network, in °C; T h is the return water temperature of the secondary pipe network, in °C; a is the heat dissipation coefficient; T in is the indoor temperature, in °C; Q S2 is the non-indoor heating heat dissipation loss load of the secondary pipe network, in W / min; C s is the specific heat capacity of the secondary pipe network circulation, in kJ / (kg·℃). In addition, the second formula can be obtained by the following formula:

[0084]

[0085] Correspondingly, determining the secondary pipe network return water temperature recovery time based on the current secondary pipe network water supply temperature and the secondary pipe network return water temperature model includes: substituting the current secondary pipe network water supply temperature as the secondary pipe network water supply temperature into the second formula to obtain the secondary pipe network return water temperature recovery time.

[0086] In addition, since the secondary pipe network return water temperature model takes into account the indoor temperature, that is, the ambient temperature, this solution can determine the optimal heat storage start time during the off-peak electricity price period based on the relationship between the maximum heat storage capacity and duration of the secondary pipe network and the water supply temperature at different ambient temperatures, as well as the maximum indoor heat storage duration of the user, so as to achieve maximum heat storage and minimum heat dissipation loss while ensuring that the secondary pipe network and the user's indoor heating meet the heating needs.

[0087] In an optional embodiment of the present invention, the pipe network heat storage control method further includes: according to the secondary pipe network return water temperature model, calculating the optimal heat release time in the process of reducing the secondary pipe network return water, and increasing the secondary pipe network water supply temperature through the primary pipe network during the optimal heat release time. During the optimal heat release time, the secondary pipe network return water temperature gradually decreases, and the temperature difference between the return water temperature and the water supply temperature increases, which helps to improve the efficiency of heat transfer. At the same time, by increasing the secondary pipe network water supply temperature through the primary pipe network, it can be ensured that during the heat release process, the secondary pipe network can continuously obtain sufficient heat and maintain the stability of heat transfer. During the optimal heat release time, by adjusting the water supply temperature of the primary pipe network, it can be ensured that the heat released by the secondary pipe network in the user's room meets the heating demand. This helps to maintain the stability and comfort of the user's indoor temperature and avoid insufficient heating or overheating caused by temperature fluctuations. By accurately calculating the optimal heat release time and adjusting the water supply temperature of the primary pipe network, unnecessary heat waste can be avoided. This helps to reduce the energy consumption and operating costs of the heating system and achieve the goal of energy saving and emission reduction.

[0088] In an optional embodiment of the present invention, the second mathematical model includes a third formula, and the third formula is:

[0089] Among them, T in is the indoor temperature, t in is the maximum duration of indoor heat storage for users, in min; ρ a is the indoor air density, in kg / m 3 ; C a is the specific heat capacity of air, in kJ / (kg·℃); F is the heating area, in m 2 ;h a is the average indoor height of the heating area, in meters; T g is the water supply temperature of the secondary pipe network, in °C; Th is the return water temperature of the secondary pipe network, in °C; F1 is the building maintenance structure area, in m 2 ; γ is the heat transfer coefficient from the building maintenance structure to the outside, the unit is W / (m 2 ℃); T o is the outdoor temperature, in °C; F2 is the area of ​​the building receiving solar radiation, in m 2 ;η solar radiation intensity absorption rate of building maintenance structure; H t is the solar radiation intensity, unit is W / (m 2 ·min); In addition, the third formula can be obtained by the following formula:

[0090]

[0091] Correspondingly, determining the maximum indoor heat storage time of the user based on the current secondary pipe network water supply temperature and the second mathematical model includes: substituting the current secondary pipe network water supply temperature as the secondary pipe network water supply temperature into the third formula to obtain the maximum indoor heat storage time of the user.

[0092] Embodiment 2

[0093] Figure 4 A flow chart of a pipe network heat storage control method provided for Embodiment 2 of the present invention, and the relationship between this embodiment and the above-mentioned embodiment is that Embodiment 1 is improved. Optionally, the determining the optimal heat storage start time for the valley electricity price period based on the maximum heat storage time of the secondary pipe network, the maximum indoor heat storage time of the user and the valley electricity price period includes: determining the end time of the heat storage period based on the valley electricity price period; when the time difference between the maximum heat storage time of the secondary pipe network and the maximum indoor heat storage time of the user is greater than or equal to the upper limit threshold of the difference, determining the time before the end time of the heat storage period and the interval time with the end time of the heat storage period is the maximum indoor heat storage time of the user as the optimal heat storage start time; when the time difference between the maximum heat storage time of the secondary pipe network and the maximum indoor heat storage time of the user is less than or equal to the lower limit threshold of the difference, the time before the end of the heat storage period and the interval between the end of the heat storage period and the maximum heat storage time of the secondary pipe network is determined as the optimal heat storage start time, where the lower limit threshold of the difference is a negative number; when the difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's indoor heat storage is greater than the lower limit threshold of the difference and less than the upper limit threshold of the difference, and the maximum heat storage time of the secondary pipe network is less than or equal to the valley electricity price period, the time before the end of the heat storage period and the interval between the end of the heat storage period and the maximum heat storage time of the secondary pipe network is determined as the optimal heat storage start time. Figure 4 As shown, the pipe network heat storage control method includes:

[0094] S210, establishing a first mathematical model between the maximum heat storage capacity, duration and water supply temperature of the secondary pipe network.

[0095] S220. Determine the maximum heat storage time of the secondary pipe network based on the current water supply temperature of the secondary pipe network and the first mathematical model.

[0096] Among them, the maximum heat storage time of the secondary pipe network is the time required for the secondary pipe network to reach the maximum heat storage at the current secondary pipe network water supply temperature.

[0097] S230: Establish a second mathematical model between the user's maximum heat storage capacity, duration, and water supply temperature.

[0098] S240: Determine the maximum indoor heat storage time of the user based on the current secondary pipe network water supply temperature and the second mathematical model.

[0099] Among them, the maximum indoor heat storage time of the user is the time required for the user's indoor heat storage to reach the maximum value under the current secondary pipe network water supply temperature.

[0100] S250. Determine the end time of the heat storage period based on the valley electricity price period.

[0101] Among them, the end time of the heat storage period is the end time of the valley electricity price period.

[0102] S260: When the difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's room is greater than or equal to the upper limit threshold of the difference, a time before the end time of the heat storage period and the interval time from the end time of the heat storage period to the maximum heat storage time of the user's room is determined as the optimal heat storage start time.

[0103] Among them, due to the inconsistency of the specific heat capacity and maximum heat storage temperature of the secondary pipe network and the user's room, the two may not reach the maximum heat storage at the same time. When the difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's room is greater than or equal to the upper limit threshold of the difference, it means that the maximum heat storage time of the secondary pipe network is greater than the maximum heat storage time of the user's room. At this time, the time before the end of the heat storage period and the interval with the end of the heat storage period is the maximum heat storage time of the user's room is determined as the optimal heat storage start time, which can ensure that the secondary pipe network matches the heat storage demand of the user's room during the heat storage process, avoiding energy waste caused by too early or too late heat storage. This allows the entire heating system to achieve maximum heat storage during the off-peak electricity price period while reducing the heat dissipation loss of the entire system during the heat storage process.

[0104] In some embodiments, if the upper limit threshold of the difference is 20 minutes, the maximum heat storage time of the secondary pipe network is 2.5 hours, the maximum indoor heat storage time of the user is 2 hours, the valley electricity price period etching time is 1:00, and the end time of the heat storage period is 5:00, it can be determined that the time difference between the maximum heat storage time of the secondary pipe network and the maximum indoor heat storage time of the user is 2.5-2, and the time difference is greater than 20 minutes. Therefore, it can be determined that the time before the end time of the heat storage period and the interval time with the end time of the heat storage period is the maximum indoor heat storage time of the user is 3:00, that is, the optimal heat storage start time is 3:00.

[0105] In some embodiments, when the time difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's room is greater than or equal to the upper limit threshold of the difference, the secondary pipe network water supply temperature is adjusted to reduce the time difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's room. If the secondary pipe network water supply temperature cannot be adjusted, the step of determining the time before the end time of the heat storage period and the time interval between the end time of the heat storage period and the maximum heat storage time of the user's room as the optimal heat storage start time is performed.

[0106] S270: When the difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's indoor space is less than or equal to the lower limit threshold of the difference, the time before the end time of the heat storage period and the interval time with the end time of the heat storage period is the maximum heat storage time of the secondary pipe network is determined as the optimal heat storage start time.

[0107] Among them, due to the inconsistency of the specific heat capacity and maximum heat storage temperature of the secondary pipeline network and the user's indoor space, the two may not reach the maximum heat storage capacity at the same time. When the difference between the maximum heat storage time of the secondary pipeline network and the maximum heat storage time of the user's indoor space is less than or equal to the lower limit threshold of the difference, it means that the maximum heat storage time of the secondary pipeline network is less than the maximum heat storage time of the user's indoor space. At this time, the time before the end of the heat storage period and the interval with the end of the heat storage period is the maximum heat storage time of the secondary pipeline network is determined as the optimal heat storage start time, which can ensure that the secondary pipeline network matches the heat storage demand of the user's indoor space during the heat storage process, avoid energy waste caused by too early or too late heat storage, and enable the entire heating system to achieve maximum heat storage during the off-peak electricity price period while reducing the heat dissipation loss of the entire system during the heat storage process.

[0108] In some embodiments, the lower limit threshold of the difference can be a negative number. For example, if the lower limit threshold of the difference is -20min, the maximum heat storage time of the secondary pipe network is 2.5h, the maximum indoor heat storage time of the user is 3h, the valley electricity price period etching time is 1:00, and the end time of the heat storage period is 5:00, then it can be determined that the time difference between the maximum heat storage time of the secondary pipe network and the maximum indoor heat storage time of the user is 2.5-3, and the time difference is less than -20min. Therefore, it can be determined that the time before the end time of the heat storage period and the interval time with the end time of the heat storage period is the maximum heat storage time of the secondary pipe network is 2:30, that is, the optimal heat storage start time is 2:30.

[0109] In some embodiments, when the difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's indoor space is less than or equal to the difference lower limit threshold, the secondary pipe network water supply temperature is adjusted to reduce the difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's indoor space. If the secondary pipe network water supply temperature cannot be adjusted, the step of determining the time before the end of the heat storage period and the time interval between the end of the heat storage period and the maximum heat storage time of the secondary pipe network as the optimal heat storage start time is performed.

[0110] S280. When the difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's indoor space is greater than the difference lower limit threshold and less than the difference upper limit threshold, and the maximum heat storage time of the secondary pipe network is less than or equal to the valley electricity price period, a moment that is before the end of the heat storage period and whose interval with the end of the heat storage period is the maximum heat storage time of the secondary pipe network is determined as the optimal heat storage start time.

[0111] Among them, when the time difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's indoor heat storage is greater than the lower limit threshold of the difference and less than the upper limit threshold of the difference, and the maximum heat storage time of the secondary pipe network is less than or equal to the time of the valley electricity price period, it means that the time difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's indoor heat storage is small, and the valley electricity price period can allow the secondary pipe network to achieve maximum heat storage. At this time, the time before the end of the heat storage period and the interval time with the end of the heat storage period is the maximum heat storage time of the secondary pipe network is determined as the optimal heat storage start time, which can meet the heating needs of users until the end of the valley electricity period, and the secondary pipe network reaches the maximum allowable value. At this time, the secondary pipe network accumulates the most heat while reducing the heat dissipation loss of the pipeline during the heat storage process. This allows the entire heating system to achieve maximum heat storage during the valley electricity price period while reducing the heat dissipation loss of the entire system during the heat storage process.

[0112] In some embodiments, if the upper limit threshold of the difference is 20min, the lower limit threshold of the difference is -20min, the maximum heat storage time of the secondary pipe network is 2.5h, the maximum indoor heat storage time of the user is 2.4h, the valley electricity price period etching time is 1:00, and the end time of the heat storage period is 5:00, it can be determined that the time difference between the maximum heat storage time of the secondary pipe network and the maximum indoor heat storage time of the user is 2.5-2.4, and the time difference is greater than -20min and less than 20min. Therefore, it can be determined that the time before the end time of the heat storage period and the interval time with the end time of the heat storage period is the maximum heat storage time of the secondary pipe network, which is 2:30, that is, the optimal heat storage start time is 2:30.

[0113] In an optional embodiment of the present invention, after determining the maximum indoor heat storage time of the user based on the current secondary pipe network water supply temperature and the second mathematical model, it also includes: when the maximum heat storage time of the secondary pipe network or the maximum indoor heat storage time of the user is greater than the heat storage period length, increasing the current secondary pipe network water supply temperature. Among them, the heat storage period length is the valley electricity price period length. When the maximum heat storage time of the secondary pipe network or the maximum indoor heat storage time of the user is greater than the heat storage period length, it means that it is difficult for the secondary pipe network to reach the maximum heat storage during the valley electricity price period. At this time, by increasing the current secondary pipe network water supply temperature, the maximum heat storage time of the secondary pipe network and the maximum indoor heat storage time of the user can be reduced, so that the secondary pipe network can subsequently meet the user's heating needs until the valley electricity price period ends and the secondary pipe network reaches the maximum allowable value. This allows the entire heating system to achieve maximum heat storage during the valley electricity price period while reducing the heat dissipation loss of the entire system during the heat storage process.

[0114] Embodiment 3

[0115] Figure 5 This is a schematic diagram of the structure of a pipe network heat storage control device provided in the third embodiment of the present invention. Figure 5 As shown, the pipe network heat storage control device includes:

[0116] The first model building module 31 is used to build a first mathematical model between the maximum heat storage capacity, duration and water supply temperature of the secondary pipe network.

[0117] The first duration determination module 32 is used to determine the maximum duration of heat storage in the secondary pipe network based on the current secondary pipe network water supply temperature and the first mathematical model, wherein the maximum duration of heat storage in the secondary pipe network is the duration required for the secondary pipe network to reach the maximum heat storage at the current secondary pipe network water supply temperature.

[0118] The second model building module 33 is used to build a second mathematical model between the user's maximum heat storage capacity, duration and water supply temperature.

[0119] The second duration determination module 34 is used to determine the maximum duration of indoor heat storage in the user based on the current secondary pipe network water supply temperature and the second mathematical model, wherein the maximum duration of indoor heat storage in the user is the duration required for the user's indoor heat storage to reach the maximum value at the current secondary pipe network water supply temperature.

[0120] The optimal heat storage determination module 35 is used to determine the optimal heat storage start time of the valley electricity price period based on the maximum heat storage time of the secondary pipe network, the maximum indoor heat storage time of the user and the valley electricity price period, so that the secondary pipe network starts to store heat at the optimal heat storage start time.

[0121] In an optional embodiment of the present invention, the first mathematical model includes a secondary pipe network temperature rise delay lag time model and a secondary pipe network return water temperature model; accordingly, the first duration determination module 32 includes:

[0122] The delay lag time determination submodule is used to determine the secondary pipe network temperature rise delay lag time based on the secondary pipe network temperature rise delay lag time model.

[0123] The temperature recovery time determination submodule is used to determine the secondary pipe network return water temperature recovery time based on the current secondary pipe network supply water temperature and the secondary pipe network return water temperature model.

[0124] The first duration determination submodule is used to determine the sum of the secondary pipe network temperature rise delay hysteresis time and the secondary pipe network return water temperature recovery time as the secondary pipe network heat storage maximum duration.

[0125] In an optional embodiment of the present invention, the secondary pipe network temperature rise delay lag time model includes a first formula, which is:

[0126] Among them, t C is the delay time of temperature rise of secondary pipe network, m s is the circulating water flow of the secondary pipe network, j is the number of pipe sections in the secondary pipe network, D i is the diameter of the i-th section of the secondary pipe network, and L is the total length of the secondary pipe network.

[0127] Correspondingly, the delay lag time determination submodule is specifically used to calculate the secondary pipe network temperature rise delay lag time by using the first formula.

[0128] In an optional embodiment of the present invention, the secondary pipe network return water temperature model includes a second formula, and the second formula is:

[0129] Among them, t h is the secondary pipe network return water temperature recovery time; m s is the circulating water flow of the secondary pipe network; T gis the water supply temperature of the secondary pipe network; T h is the return water temperature of the secondary pipe network; a is the heat dissipation coefficient, T in is the indoor temperature, Q S2 C is the non-indoor heating and heat dissipation loss load of the secondary pipe network; s is the specific heat capacity of the secondary pipe network circulation.

[0130] Correspondingly, the temperature recovery time determination submodule is specifically used to: substitute the current secondary pipe network water supply temperature as the secondary pipe network water supply temperature into the second formula to obtain the secondary pipe network return water temperature recovery time.

[0131] In an optional embodiment of the present invention, the second mathematical model includes a third formula, and the third formula is:

[0132]

[0133] Among them, T in is the indoor temperature, t in is the maximum indoor heat storage time of the user, ρ a is the indoor air density, C a is the specific heat capacity of air, F is the heating area, h a is the average indoor height of the heating area, T g is the secondary pipe network water supply temperature, T h is the return water temperature of the secondary pipe network, F1 is the building maintenance structure area, γ is the heat transfer coefficient from the building maintenance structure to the outdoors, T o is the outdoor temperature, F2 is the area of ​​the building receiving solar radiation, η is the solar radiation intensity absorption rate of the building maintenance structure, H t is the solar radiation intensity.

[0134] Correspondingly, the second duration determination module 34 is specifically used to: substitute the current secondary pipe network water supply temperature as the secondary pipe network water supply temperature into the third formula to obtain the maximum indoor heat storage duration of the user.

[0135] In an optional embodiment of the present invention, the optimal heat storage determination module 35 includes:

[0136] The end time determination submodule is used to determine the end time of the heat storage period based on the valley electricity price period.

[0137] The first optimal heat storage determination submodule is used to determine, when the time difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's indoor heat storage is greater than or equal to the upper limit threshold of the difference, a time that is before the end time of the heat storage period and the interval time with the end time of the heat storage period is the maximum heat storage time of the user's indoor heat storage as the optimal heat storage start time.

[0138] The second optimal heat storage determination submodule is used to determine, when the difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's indoor space is less than or equal to a lower limit threshold of the difference, a moment that is before the end time of the heat storage period and whose interval time with the end time of the heat storage period is the maximum heat storage time of the secondary pipe network as the optimal heat storage start time, wherein the lower limit threshold of the difference is a negative number.

[0139] The third optimal heat storage determination submodule is used to determine, when the difference between the maximum heat storage time of the secondary pipe network and the maximum indoor heat storage time of the user is greater than the difference lower limit threshold and less than the difference upper limit threshold, and the maximum heat storage time of the secondary pipe network is less than or equal to the valley electricity price period, a time that is before the end time of the heat storage period and the interval time with the end time of the heat storage period is the maximum heat storage time of the secondary pipe network as the optimal heat storage start time.

[0140] In an optional embodiment of the present invention, the pipe network heat storage control device further includes:

[0141] The temperature regulating module is used to increase the current secondary pipe network water supply temperature when the maximum heat storage time of the secondary pipe network or the maximum heat storage time of the user's indoor space is greater than the heat storage period.

[0142] The pipe network heat storage control device provided in the embodiment of the present invention can execute the pipe network heat storage control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0143] Embodiment 4

[0144] Figure 6 A schematic diagram of an electronic device that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0145] like Figure 6As shown, the electronic device includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In RAM13, various programs and data required for the operation of the electronic device can also be stored. The processor 11, ROM12 and RAM13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0146] A number of components in the electronic device are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0147] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a pipe network heat storage control method.

[0148] In some embodiments, the pipe network heat storage control method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on an electronic device via ROM 12 and / or a communication unit 19. When the computer program is loaded into RAM 13 and executed by the processor 11, one or more steps of the pipe network heat storage control method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the pipe network heat storage control method in any other appropriate manner (e.g., by means of firmware).

[0149] In some embodiments, the electronic device includes a computer program product, which includes a computer program. When the computer program is executed by the processor 11, it implements the various methods and processes described above, such as the pipe network heat storage control method.

[0150] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0151] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0152] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0153] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0154] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0155] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0156] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0157] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipe network heat storage control method, characterized in that: include: Establish the first mathematical model between the maximum heat storage capacity, duration and water supply temperature of the secondary pipe network; Determine the maximum heat storage time of the secondary pipe network based on the current secondary pipe network water supply temperature and the first mathematical model, wherein the maximum heat storage time of the secondary pipe network is the time required for the secondary pipe network to reach the maximum heat storage at the current secondary pipe network water supply temperature; Establishing a second mathematical model between the user's maximum heat storage capacity, duration and water supply temperature; Determine the maximum duration of indoor heat storage in the user based on the current secondary pipe network water supply temperature and the second mathematical model, wherein the maximum duration of indoor heat storage in the user is the duration required for the user's indoor heat storage to reach the maximum value at the current secondary pipe network water supply temperature; Based on the maximum heat storage time of the secondary pipe network, the maximum indoor heat storage time of the user and the valley electricity price period, the optimal heat storage start time of the valley electricity price period is determined so that the secondary pipe network starts to store heat at the optimal heat storage start time.

2. The pipe network heat storage control method according to claim 1, characterized in that: The first mathematical model includes a secondary pipe network temperature rise delay lag time model and a secondary pipe network return water temperature model; accordingly, the maximum heat storage time of the secondary pipe network is determined based on the current secondary pipe network water supply temperature and the first mathematical model, including: Determining the secondary pipe network temperature rise delay lag time based on the secondary pipe network temperature rise delay lag time model; Determine the secondary pipe network return water temperature recovery time based on the current secondary pipe network supply water temperature and the secondary pipe network return water temperature model; The sum of the secondary pipe network temperature rise delay lag time and the secondary pipe network return water temperature recovery time is determined as the maximum heat storage time of the secondary pipe network.

3. The pipe network heat storage control method according to claim 2, characterized in that: The secondary pipe network temperature rise delay lag time model includes a first formula, which is: Among them, t C is the delay time of temperature rise of secondary pipe network, m s is the circulating water flow of the secondary pipe network, j is the number of pipe sections in the secondary pipe network, D i is the diameter of the i-th section of the secondary pipe network, and L is the total length of the secondary pipe network; Correspondingly, determining the secondary pipe network temperature rise delay lag time based on the secondary pipe network temperature rise delay lag time model includes: The secondary pipe network temperature rise delay lag time is calculated using the first formula.

4. The pipe network heat storage control method according to claim 2, characterized in that: The secondary pipe network return water temperature model includes a second formula, which is: Among them, t h is the secondary pipe network return water temperature recovery time; m s is the circulating water flow of the secondary pipe network; T g is the water supply temperature of the secondary pipe network; T h is the return water temperature of the secondary pipe network; a is the heat dissipation coefficient, T in is the indoor temperature, Q S2 C is the non-indoor heating and heat dissipation loss load of the secondary pipe network; s is the specific heat capacity of the secondary pipe network circulation; Accordingly, the determining of the secondary pipe network return water temperature recovery time based on the current secondary pipe network supply water temperature and the secondary pipe network return water temperature model includes: The current secondary pipe network water supply temperature is substituted into the second formula as the secondary pipe network water supply temperature to obtain the secondary pipe network return water temperature recovery time.

5. The pipe network heat storage control method according to claim 1, characterized in that: The second mathematical model includes a third formula, which is: Among them, T in is the indoor temperature, t in is the maximum duration of indoor heat storage for users, ρ a is the indoor air density, C a is the specific heat capacity of air, F is the heating area, h a is the average indoor height of the heating area, T g is the secondary pipe network water supply temperature, T h is the return water temperature of the secondary pipe network, F1 is the building maintenance structure area, γ is the heat transfer coefficient from the building maintenance structure to the outdoors, T o is the outdoor temperature, F2 is the area of ​​the building receiving solar radiation, η is the solar radiation intensity absorption rate of the building maintenance structure, H t is the solar radiation intensity; Accordingly, the method of determining the maximum indoor heat storage time of the user based on the current secondary pipe network water supply temperature and the second mathematical model includes: The current secondary pipe network water supply temperature is substituted into the third formula as the secondary pipe network water supply temperature to obtain the maximum indoor heat storage time of the user.

6. The pipe network heat storage control method according to any one of claims 1 to 5, characterized in that: The determining the optimal heat storage start time for the valley electricity price period based on the maximum heat storage time of the secondary pipe network, the maximum heat storage time of the user's indoor space and the valley electricity price period includes: Determine the end time of the heat storage period based on the valley electricity price period; When the time difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's room is greater than or equal to the upper limit threshold of the difference, the time before the end time of the heat storage period and the interval time from the end time of the heat storage period to the maximum heat storage time of the user's room is determined as the optimal heat storage start time; When the difference between the maximum heat storage time of the secondary pipe network and the maximum heat storage time of the user's room is less than or equal to the lower limit threshold of the difference, the time before the end time of the heat storage period and the interval time from the end time of the heat storage period is the maximum heat storage time of the secondary pipe network is determined as the optimal heat storage start time, wherein the lower limit threshold of the difference is a negative number; When the difference between the maximum heat storage time of the secondary pipe network and the maximum indoor heat storage time of the user is greater than the lower limit threshold of the difference and less than the upper limit threshold of the difference, and the maximum heat storage time of the secondary pipe network is less than or equal to the valley electricity price period, the moment that is before the end time of the heat storage period and the interval time with the end time of the heat storage period is the maximum heat storage time of the secondary pipe network is determined as the optimal heat storage start time.

7. The pipe network heat storage control method according to any one of claims 1 to 5, characterized in that: After determining the maximum indoor heat storage time of the user based on the current secondary pipe network water supply temperature and the second mathematical model, the method further includes: When the maximum heat storage time of the secondary pipe network or the maximum heat storage time of the user's indoor space is greater than the heat storage period, the current secondary pipe network water supply temperature is increased.

8. A pipe network heat storage control device, characterized in that: include: A first model building module is used to establish a first mathematical model between the maximum heat storage capacity, duration and water supply temperature of the secondary pipe network; A first duration determination module, configured to determine a maximum duration of heat storage in the secondary pipe network based on a current secondary pipe network water supply temperature and the first mathematical model, wherein the maximum duration of heat storage in the secondary pipe network is the duration required for the secondary pipe network to reach a maximum heat storage at the current secondary pipe network water supply temperature; A second model building module is used to build a second mathematical model between the user's maximum heat storage capacity, duration and water supply temperature; A second duration determination module is used to determine the maximum duration of indoor heat storage in the user based on the current secondary pipe network water supply temperature and the second mathematical model, wherein the maximum duration of indoor heat storage in the user is the duration required for the user's indoor heat storage to reach the maximum value at the current secondary pipe network water supply temperature; The optimal heat storage determination module is used to determine the optimal heat storage start time of the valley electricity price period based on the maximum heat storage time of the secondary pipe network, the maximum indoor heat storage time of the user and the valley electricity price period, so that the secondary pipe network starts to store heat at the optimal heat storage start time.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the pipe network heat storage control method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the pipe network heat storage control method according to any one of claims 1 to 7 when executed.

11. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the pipe network heat storage control method according to any one of claims 1 to 7 is implemented.

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