Method and system for improving heating and heat supply capacity through concrete energy storage

Abstract

The invention discloses a technology for improving heating capacity by using concrete energy storage, which relates to the technical field of heating and energy storage, and comprises the following steps: carrying out first adjustment treatment on a first object according to a first execution state of the first object and a first target demand; collecting first feature data of the first object in the first execution state, and calculating first state data according to the first feature data; obtaining first stable data through the first state data so as to construct a first state prediction model; and arranging the measuring points to monitor the first execution state in real time and calculate feature data in the first execution state. According to the method, the system for improving the heating capacity through concrete energy storage is provided, it can be ensured that heat is efficiently released in the unit load peak period by adopting the mode of dynamically adjusting the heat storage process and adjusting the working parameters of the system, and the heat supply efficiency is improved. The problem that an existing heat energy storage and release system cannot be accurately adjusted during high-load operation is solved.

Description

Technical Field

[0001] The present invention relates to the field of heating and energy storage technology, and specifically to a technology and system for improving heating capacity by using concrete energy storage. Background Art

[0002] With the continuous increase in the installed capacity of new energy power generation such as solar energy and wind energy, traditional thermal power generation has gradually changed from the main role of power generation to supply guarantee and peak load regulation. At present, urban residents in my country still rely mainly on heating steam extraction from thermal power plants. As thermal power units frequently participate in the peak load regulation of the power grid, the heating steam extraction capacity of the units fluctuates accordingly. With the continuous increase in the capacity of new energy grid-connected power generation, the depth of participation of thermal power units in peak load regulation has gradually increased, and the frequency has gradually increased. With the advancement of urbanization, the demand for urban heating has continued to increase, and the technology for thermal power plants to improve their heating capacity has continued to develop. Common technologies include: medium and low pressure connecting pipe steam extraction heating transformation, high back pressure / low vacuum heating transformation, low pressure optical axis heating transformation, heat pump heating transformation, low pressure cylinder zero output heating transformation, turbine bypass heating transformation, etc.

[0003] The above heating steam extraction technologies are all modified on the steam source side, aiming to improve the heating steam extraction capacity of the unit under low power load conditions by changing the steam-water process of thermal power generation. Therefore, the heating capacity of the above technologies is limited by the unit's own technical parameters and grid dispatch, and cannot break through the limitations of the unit's own thermal system. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention is proposed.

[0005] Therefore, the technical problem solved by the present invention is: the existing technologies include: medium and low pressure connecting pipe steam extraction heating modification, high back pressure / low vacuum heating modification, low pressure optical axis heating modification, heat pump heating modification, low pressure cylinder zero output heating modification, turbine bypass heating modification and other methods have heating capacity limited by the unit's own technical parameters and power grid scheduling, and cannot break through the unit's own thermal system limitations; and how to store the heat energy in the heating steam extraction during the peak output period of the unit in concrete, a common building material, without affecting the thermal power generating unit's participation in the deep peak-shaving scheduling of the power grid.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a technology for improving heating capacity by using concrete energy storage, comprising:

[0007] As a preferred solution of the method for improving heating capacity by using concrete energy storage according to the present invention, wherein: a first adjustment process is performed on the first object according to a first execution state of the first object and a first target demand;

[0008] Collecting first characteristic data of the first object in the first execution state, and calculating first state data according to the first characteristic data;

[0009] Obtaining first stable data through first state data to construct a first state prediction model;

[0010] Measuring points are arranged to monitor the first execution state in real time and calculate characteristic data in the first execution state.

[0011] As a preferred solution of the method for improving heating capacity by using concrete energy storage described in the present invention, the setting process includes making a judgment based on the first execution state to adjust the sub-part state of the first object.

[0012] As a preferred solution of the method for improving heating capacity by using concrete energy storage as described in the present invention, the calculation of the first state data includes comparing the first execution state and the first characteristic parameter of the first object to obtain the corresponding first state data.

[0013] As a preferred solution of the method of improving heating capacity by utilizing concrete energy storage as described in the present invention, wherein: the construction of the first state prediction model includes analyzing and screening the first state data, and constructing a prediction model based on the relationship between the changes in the screened data and the impact on the first execution state.

[0014] As a preferred solution of the method for improving heating capacity by using concrete energy storage as described in the present invention, the calculation of the first effect includes calculating the actual performance through the first object's own parameters when executing the first state.

[0015] As a preferred solution of the method for improving heating capacity by utilizing concrete energy storage as described in the present invention, wherein: the first execution state includes a state switching result obtained when the first object switches state during operation.

[0016] As a preferred solution of the method for improving heating capacity by using concrete energy storage as described in the present invention, the arrangement of measuring points includes evenly arranging thermocouple temperature measuring points around the first object to monitor the process in real time.

[0017] As a preferred solution of the method for improving heating capacity by using concrete energy storage according to the present invention, it includes: a setting module, a storage module, a prediction module, a monitoring module

[0018] The setting module is used to: set the heat storage device according to the change of the peak load operation cycle of the unit and the heating load demand;

[0019] The storage module is used to store the heat energy of the steam extracted for heating during the peak output period of the unit in the concrete, and release the heat stored in the concrete through the circulating water of the heat network;

[0020] The prediction module is used to: predict the dynamic regulation of concrete energy change, heat storage and release;

[0021] The monitoring module is used to evenly arrange thermocouple temperature measuring points around the heat storage heat exchanger to monitor the operating status of the heat storage system and calculate the heat storage, heat release and heat storage.

[0022] A computer device includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement a method and system for improving heating capacity by using concrete energy storage.

[0023] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of a method and system for improving heating capacity by using concrete energy storage.

[0024] Beneficial effects of the invention: The invention provides a system for improving heating capacity by utilizing concrete energy storage, which can ensure efficient heat release during peak unit load periods by dynamically adjusting the heat storage process and adjusting the system's operating parameters, thereby solving the problem that current thermal energy storage and release systems cannot be accurately adjusted during high-load operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0026] Figure 1 An overall flow chart of a method for improving heating capacity by using concrete energy storage provided by the first embodiment of the present invention;

[0027] Figure 2 A heating flow chart of a heating process of a traditional thermal power unit using concrete energy storage to improve heating capacity provided by the first embodiment of the present invention;

[0028] Figure 3 An overall system diagram for improving heating capacity by using concrete energy storage provided by the first embodiment of the present invention;

[0029] Figure 4 A structural schematic diagram of a heat storage process of a single concrete heat accumulator for improving heating capacity by using concrete energy storage provided by the first embodiment of the present invention;

[0030] Figure 5A structural schematic diagram of the heat release process of a single concrete heat accumulator for improving heating capacity by utilizing concrete energy storage is provided in the first embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0032] Example 1, reference Figure 1-5 , which is an embodiment of the present invention, provides a technology for improving heating capacity by using concrete energy storage, including:

[0033] S1: performing a first adjustment process on the first object according to a first execution state and a first target requirement of the first object.

[0034] Specifically: the first adjustment process includes making a judgment according to the first execution state, thereby adjusting the state of the sub-part of the first object. In this embodiment: specifically, the concrete heat storage and heat exchange device is set according to the change of the peak load operation cycle of the unit and the heating load demand.

[0035] In this embodiment, the first object is a concrete heat storage and heat exchange device, the first execution state is device heat storage and device heat exchange, and further, the first adjustment process includes heat storage power adjustment and heat exchange power adjustment of the heat storage and heat exchange mode. Heat storage power adjustment includes controlling the power output of the electric heating system, adjusting the working temperature of the heat storage device, etc. Heat exchange power adjustment includes adjusting the heat exchange efficiency of the heat exchanger, adjusting the circulating water flow of the heat network, etc.

[0036] In an optional embodiment, the first adjustment process may also be heat storage mode adjustment or heat exchange mode adjustment. For these two adjustment modes, the quantitative characteristic data may include the following power adjustment parameters and temperature adjustment parameters: heat storage mode adjustment, power adjustment parameters: heat storage power, heat energy input rate, etc. Temperature adjustment parameters: upper limit of heat storage temperature, temperature gradient, etc. Heat exchange mode adjustment, power adjustment parameters: heat exchange power, heat energy output rate, etc. Temperature adjustment parameters: lower limit of heat exchange temperature, heat exchange efficiency, etc.

[0037] S2: Collect first feature data of the first object in the first execution state, and calculate first state data according to the first feature data.

[0038] Specifically: the calculation of the first state data includes comparing the first execution state of the first object and the first characteristic parameter to obtain the corresponding first state data. In this embodiment: specifically, the concrete heat storage and heat exchange device parameters are collected under the heat release and heat storage of the concrete heat storage and heat exchange device, and the heat storage and release data are calculated.

[0039] In this embodiment, the first characteristic data is the temperature and power parameters of the device. Furthermore, the first state data includes the heat storage parameters and heat release parameters calculated by the heat storage and release formula. The heat storage parameters include heat storage efficiency, heat storage time, heat storage loss, etc. The heat release parameters include heat release attenuation, heat release efficiency, heat release time, etc.

[0040] In an optional embodiment, the first state data may also be heat storage mode data or heat exchange mode data. For these two mode data, the quantitative characteristic data may include the following power adjustment parameters and temperature adjustment parameters: heat storage mode data, power adjustment parameters: input power, power change rate, etc. Temperature adjustment parameters: heat storage temperature, temperature fluctuation range, etc. Heat exchange mode data, power adjustment parameters: output power, power conversion efficiency, etc. Temperature adjustment parameters: heat exchange temperature, temperature recovery rate, etc.

[0041] S3: Obtain first stable data through the first state data to construct a first state prediction model.

[0042] Specifically: the construction of the first state prediction model includes analyzing and screening the first state data, and constructing a prediction model based on the relationship between the screened data changes and the impact on the first execution state. In this embodiment: specifically, the peak load operation data of the unit is analyzed and the data changes are summarized and judged, and an exponential decay function is established to describe the decay process of temperature changes over time.

[0043] In this embodiment, the first stable data is heat decay data, and further, the first stable data includes the decay rate and decay time constant of the heat decay data. The decay rate includes the rate of temperature or heat loss per unit time, etc. The decay time constant includes the time length for the temperature or heat to decay from the initial value to 63%, etc.

[0044] In an optional embodiment, the first stable data may also be energy storage efficiency data or temperature fluctuation data. For these two data types, the quantitative characteristic data may include the following power transfer parameters and time delay parameters: energy storage efficiency data, power transfer parameters: energy input power, energy output power, etc. Time delay parameters: response time during energy storage, etc. Temperature fluctuation data, power transfer parameters: temperature fluctuation amplitude, fluctuation frequency, etc. Time delay parameters: response time of temperature fluctuation, etc.

[0045] S4: Arrange measurement points to monitor the first execution state in real time and calculate characteristic data in the first execution state.

[0046] Specifically: the calculation of the first effect includes calculating the actual performance through the parameters of the first object when executing the first state. In this embodiment: specifically, thermocouple temperature measurement points are evenly arranged around the heat storage and heat exchange device, the operation state of the heat storage system is monitored, and the heat storage, heat release and heat storage are calculated.

[0047] In this embodiment, the first effect is the calculation result of heat storage and heat release. Further, the first effect includes the heat storage effect and heat release effect of the heat storage system. The heat storage effect includes the total heat stored in the heat storage device, the heat absorption per unit time, etc. The heat release effect includes the heat release rate, the total heat released, etc.

[0048] In an optional embodiment, the first effect may also be system efficiency evaluation or energy loss analysis. For these two types of effects, the quantitative characteristic data may include the following temperature change parameters and energy transfer parameters: system efficiency evaluation, temperature change parameters: temperature change amplitude, temperature change rate, etc. Energy transfer parameters: energy loss rate, energy transmission efficiency, etc. Energy loss analysis, temperature change parameters: temperature deviation, temperature response time, etc. Energy transfer parameters: heat loss, heat flow, etc.

[0049] Embodiment 2 is an embodiment of the present invention, which provides an algorithm implementation process of a method for improving heating capacity by using concrete energy storage, including:

[0050] S1: The heat contained in the unit's heating steam extraction is stored in the concrete energy storage device in advance. When the unit participates in deep peak regulation and the heating steam extraction capacity decreases, the heat is released to supplement the heat load of the unit's insufficient heating capacity and improve the overall operating stability of the heating system.

[0051] Furthermore, this technology uses concrete heat storage to store the heat of the heat network circulating water in the concrete. When the unit participates in deep peak regulation and the heating steam extraction capacity is insufficient, the heat stored in the concrete is released through the heat network circulating water to smooth the impact of heating steam extraction fluctuations on heating stability, and at the same time improve the peak operation capacity of the unit during the extreme cold period. In addition, units participating in spot electricity trading can arrange energy storage in advance according to the changes in the unit load, and store the heat contained in the unit's heating steam extraction in the concrete energy storage device in advance, reducing the situation where the unit load is limited by the heating load during the future operation of the unit.

[0052] It should be noted that the concrete heat storage device can be set up according to the changes in the peak-shaving operation cycle of the unit and the heating load demand, and multiple heat storage devices can be operated in series to improve the overall heat storage capacity.

[0053] S2: Concrete energy storage technology relies on concrete as a thermal energy storage medium to regulate indoor temperature by absorbing and releasing heat. In order to better reflect this process, we will consider the following factors: concrete's specific heat capacity, mass, temperature change, etc. The efficiency of heat transfer from external heat sources to concrete. Consider the response time of the energy storage system, energy loss and heat balance. Such as changes in external heat sources, load requirements, etc.

[0054] Furthermore, existing heat storage formulas based on specific heat capacity calculation assume that concrete only considers the effects of mass and specific heat capacity when absorbing or releasing heat, and does not consider factors such as thermal conductivity, heat conduction efficiency, and dynamic response.

[0055] Furthermore, considering the dynamic adjustment, the supplement of external heat source, the response of energy storage system and other factors in the invention, the improved formula can more accurately describe the whole process of concrete energy storage. Specifically, considering the heat transfer efficiency, the dynamic response time of the system and the influence of external heat source, the improved formula is:

[0056]

[0057] Where E(t) represents the total energy at time t, m is the mass of concrete, c is the specific heat capacity of concrete, ΔT(t) represents the temperature change at time t, α represents the proportionality coefficient related to the temperature change, β represents the influence coefficient of the thermal conduction efficiency of the energy storage system, γ represents the temperature attenuation coefficient, and η represents the external heat source efficiency P ext表示 The external heat source power, λ represents the dynamic response time coefficient of the energy storage system.

[0058] It should be noted that this formula can accurately describe the energy changes, dynamic regulation of heat storage and release of the concrete energy storage system during heating and heat supply, and combine the influence of external heat sources.

[0059] S3: Calculation of heat storage, heat release and heat storage includes: heat storage and heat release are calculated based on the inlet and outlet temperatures of the heat network circulating water at the soil energy storage heat exchanger and the circulating water flow rate;

[0060] Heat storage calculation:

[0061] Calculation of heat release:

[0062] Where Q 储1 represents the soil heat storage, Q 放1 Indicates the heat released by the soil, C p表示热 The specific heat capacity of the circulating water, ρ represents the circulating water density, V represents the circulating water flow rate, T 2 Indicates the circulating water inlet temperature, T1 Indicates the circulating water outlet temperature. 1 represents the heat storage start time, t 2 Indicates the end time of heat storage;

[0063] Calculate the heat storage efficiency formula based on the parameters of the circulating water side of the heat network;

[0064] The ratio of heat release to heat storage is the heat storage efficiency:

[0065] According to the heat transfer calculation on the concrete side, the formula is as follows:

[0066]

[0067] Where α represents the heat transfer coefficient of concrete;

[0068] Concrete heat storage (Q 储2 ) is calculated as follows:

[0069] Q 储2 =ρC p,混凝土 ∫∫∫Δtdv

[0070] Where ρ represents the density of concrete, C p，土壤 Represents the specific heat capacity of concrete.

[0071] Example 3 is an embodiment of the present invention, which provides a technology for improving heating capacity by using concrete energy storage. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments.

[0072] First, taking a 600MW unit as an example, its heating steam extraction capacity under different electrical load conditions is shown in the following table;

[0073] Table 1 Permissible operating range of a 600MW unit for single-unit heating extraction during the heating season

[0074] Heating steam extraction capacity (t / h) Load lower limit(MW) Load limit (MW) 200 140 585 400 150 530 600 200 480 800 270 430 1000 330 390

[0075] It can be seen from the table that the greater the unit's steam extraction, the narrower the unit's allowable operating range. When the demand for heating steam extraction decreases from 1000t / h to 400t / h, the unit's load change range increases from 60MW to 380M. This shows that after adopting concrete energy storage and heat storage technology, the unit's peak-shaving capacity has been greatly increased.

[0076] Embodiment 4 is an embodiment of the present invention, which provides a system for improving heating capacity by using concrete energy storage, including a setting module, a storage module, a prediction module, and a monitoring module.

[0077] The setting module is used to set the heat storage device according to the changes in the peak-shaving operation cycle of the unit and the heating load demand.

[0078] The storage module is used to store the heat energy of the heating steam extracted during the peak output period of the unit in the concrete, and release the heat stored in the concrete through the circulating water of the heat network.

[0079] The prediction module is used to predict the dynamic regulation of concrete energy change, heat storage and release.

[0080] The monitoring module is used to evenly arrange thermocouple temperature measuring points around the heat storage heat exchanger to monitor the operating status of the heat storage system and calculate the heat storage, heat release and heat storage.

[0081] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0082] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0083] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0084] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc. It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limited. Although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

[0085] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for improving heating capacity by using concrete energy storage, characterized in that: include: Performing a first adjustment process on the first object according to a first execution state of the first object and a first target requirement; Collecting first characteristic data of the first object in the first execution state, and calculating first state data according to the first characteristic data; Obtaining first stable data through first state data to construct a first state prediction model; Measuring points are arranged to monitor the first execution state in real time and calculate characteristic data in the first execution state.

2. The method for improving heating capacity by using concrete energy storage as claimed in claim 1, characterized in that: The first adjustment process includes making a judgment according to the first execution state, thereby adjusting the sub-part state of the first object.

3. The method for improving heating capacity by using concrete energy storage as claimed in claim 2, characterized in that: The calculating the first state data includes comparing the first execution state of the first object and the first characteristic parameter to obtain the corresponding first state data.

4. The method for improving heating capacity by using concrete energy storage as claimed in claim 3, characterized in that: The constructing of the first state prediction model includes analyzing and screening the first state data, and constructing a prediction model according to the relationship between the screened data changes and the impact on the first execution state.

5. The method for improving heating capacity by using concrete energy storage as claimed in claim 4, characterized in that: The calculating of the first effect includes calculating the actual performance through the first object's own parameters when executing the first state.

6. The method for improving heating capacity by using concrete energy storage as claimed in claim 5, characterized in that: The first execution state includes a state switching result obtained when the state of the first object is switched during the running process.

7. The method for improving heating capacity by using concrete energy storage as claimed in claim 6, characterized in that: The arranging of the measuring points includes evenly arranging thermocouple temperature measuring points around the first object to monitor the process in real time.

8. A system for improving heating capacity by utilizing concrete energy storage as claimed in any one of claims 1 to 7, characterized in that: include: Including setting module, storage module, prediction module, monitoring module The setting module is used to: set the heat storage device according to the change of the peak load operation cycle of the unit and the heating load demand; The storage module is used to store the heat energy of the steam extracted for heating during the peak output period of the unit in the concrete, and release the heat stored in the concrete through the circulating water of the heat network; The prediction module is used to: predict the dynamic regulation of concrete energy change, heat storage and release; The monitoring module is used to evenly arrange thermocouple temperature measuring points around the heat storage heat exchanger to monitor the operating status of the heat storage system and calculate the heat storage, heat release and heat storage.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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