Intelligent control method for integrated heat supply and energy storage unit

Abstract

The invention provides an intelligent control method for an integrated heat supply and energy storage unit, relates to the technical field of unit control methods, and aims to solve the problems that most of existing energy storage units store much ice, a building design unit systematically designs a cold (heat) medium pump, piping, control loading capacity and the like according to the capacity of an energy storage pool, and an installation company processes and installs the ice on site, so that the energy storage unit is inconvenient to use. At present, no technology and quality standard exist in the country and the industry, standardized design and construction cannot be achieved, the construction period is long, the difficulty is large, debugging is complex, and the construction cost is high. And each functional section is formed by installing corresponding functional equipment in one or more containers with the same or different sizes.

Description

Technical Field

[0001] The present invention relates to the technical field of unit control methods, and in particular to an intelligent control method for an integrated heating energy storage unit. Background Art

[0002] Energy storage units use cheap electricity during low-load periods of the power grid to store the cold (heat) energy obtained by the refrigeration (heat) machine in the form of sensible heat or latent heat through heat transfer media. During high-load periods of the power grid with expensive electricity prices, the cold (heat) energy stored in the energy storage medium in the energy storage system is released through heat exchangers and used by the load. Energy storage units generally use valley electricity to store energy at night and release energy during peak electricity during the day, reducing the peak-valley difference during high and low load periods of the power grid and realizing the "peak shifting and valley filling" of electricity. This is a new trend in the development of central air conditioning.

[0003] Most of the existing energy storage units are ice storage units. Most of them are designed by architectural design units according to the capacity system of the energy storage tank, such as cold (hot) medium pumps, piping, control capacity, etc., and then processed and installed on site by installation companies. At present, there are no technical and quality standards in the country and the industry, and the design and construction cannot be standardized, resulting in a long construction period, great difficulty, complex debugging, and high project cost. Therefore, it is important to design an integrated heating energy storage unit intelligent control method to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that most of the existing energy storage units store ice in the prior art, and most of them are designed by architectural design units according to the energy storage tank capacity system, such as cold (hot) medium pumps, piping, control capacity, etc., and then processed and installed on site by installation companies. At present, there are no technical and quality standards in the country and the industry, and the design and construction cannot be standardized, resulting in a long construction period, great difficulty, complex debugging, and high engineering cost. An intelligent control method for an integrated heating energy storage unit is proposed.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an integrated heating energy storage unit intelligent control method, characterized in that it is composed of four functional sections, namely, refrigeration, heating functional section, energy storage functional section, heat exchange functional section, and control functional section, or a combination of two or three functional sections, each functional section is composed of one or more containers of the same or different sizes with corresponding functional equipment installed, and the containers between the functional sections and the containers within each functional section are connected in series, parallel, or mixed series and parallel by various pipelines and control lines to form a closed circulation system.

[0006] Preferably, the container may be box-shaped or cylindrical, and only one functional device or multiple functional devices may be installed in each container. The containers may be connected to each other as a whole by bolts and other connecting parts.

[0007] Preferably, the refrigeration and heating functional section is composed of one or more refrigeration and heating engines.

[0008] Preferably, the refrigeration and heat engines in the refrigeration and heat function sections are composed of various types of compressors and condensers, throttling devices, evaporator refrigeration and heat equipment components installed in the above-mentioned containers, and refrigeration and heat equipment of electric boilers can also be installed.

[0009] Preferably, the energy storage functional section is composed of one or more energy storage machines, and the energy storage machine is composed of a container and an insulation layer, an energy storage system, and a heat transfer system.

[0010] Preferably, the energy storage system can be a ball type or a coil type, and the energy storage method can be latent heat type, sensible heat type, or a latent and sensible mixed type.

[0011] Preferably, the heat exchange functional section is composed of one or more heat exchangers, and the heat exchanger can be a plate heat exchanger, or a shell and tube or sleeve heat exchanger.

[0012] Preferably, the control function section is composed of electromechanical equipment and control equipment.

[0013] Preferably, the electromechanical equipment consists of one or more heat transfer medium pumps, an electric regulating valve, and a sensor.

[0014] Preferably, the control equipment is divided into three parts: a front-end field control system, a back-end monitoring system, and a remote monitoring system. The front-end field monitoring system is composed of a programmable logic controller system and a manual control device, and is connected to each functional section of the unit.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are: In the present invention, standardized series of unit products of various specifications can be mass-produced during use, thereby greatly improving the reliability and quality of the products, and at the same time greatly shortening the construction period of the energy storage central air-conditioning system, reducing the installation and debugging workload, and reducing user costs. It solves the problem that the existing energy storage units are mostly ice storage, and most of them are designed by architectural design units according to the energy storage tank capacity system, including cold (hot) medium pumps, piping, control volume, etc., and then processed and installed on-site by installation companies. At present, there are no technical and quality standards in the country and the industry, and standardized design and construction cannot be achieved, resulting in a long construction period, great difficulty, complex debugging, and high project cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A connection diagram of all functional segments of the present invention and all functional devices within each functional segment connected in series; Figure 2 A connection diagram of the present invention in which the functional segments are connected in series and the functional devices within each functional segment are connected in parallel; Figure 3 This is a connection diagram of the present invention in which the functional segments are connected in parallel and the functional devices within each functional segment are connected in series; Figure 4 It is a connection diagram of all functional segments and functional devices in each function in parallel in the present invention; Figure 5 It is a planar installation schematic diagram of all units of the present invention.

[0017] Legend: 1. Refrigeration and heat engine; 2. Refrigeration and heat functional section; 3. Energy storage machine; 4. Energy storage functional section; 5. Control equipment; 6. Control functional section; 7. Electromechanical equipment; 8. Heat exchanger; 9. Heat exchange functional section. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0020] When the system is working on the load, when the cooling and heating functional sections 2 and the energy storage functional section 4 are connected in series, the following four working conditions can be realized respectively through the control of the control functional section 6: 1. Single cold and heat storage When the functional devices within each functional segment are connected in series, such as Figure 1 , the control function section 6 instructs valve VI to open according to user needs, the three-way regulating valve V3 to open directly, the valve V2 to close, and any one or more of the series pumps P to start, and the heat transfer medium circulates in the refrigeration, heating function section 2 and the energy storage function section 4 to achieve single cold and heat storage.

[0021] When the functional devices in each functional segment are connected in parallel, Figure 2, the control function section 6 means that according to the user's needs, one or more valves Vz and the corresponding host are opened, valve V3 is opened, valve Vh is closed, any one or more of the series pumps P are opened, and the heat transfer medium circulates from the refrigeration and heat function section 2 to the energy storage function section 4, realizing any one or more refrigeration and heat of the series refrigeration and heat engine 1, and any one or more energy storage of the series energy storage machine 3. When the functional devices within each functional section are mixed in series and parallel, the corresponding functions can also be realized.

[0022] 2. Energy storage function section: cooling, heating and cooling, heating mechanism cooling, heating When the functional devices within each functional segment are connected in series, such as Figure 1 , the control function section 6 in accordance with user needs, instructs valve VI to close, valve V2 to open, three-way regulating valve V3 to adjust, any one or more of the series pumps P to start, the heat transfer medium is mixed in the refrigeration, heating function section 2 and the energy storage function section 4 and then flows to the heat exchange function section 9 for circulation, so that the energy storage function section 4 releases cold, heats and refrigerates, and the heat function section 2 refrigerates and heats.

[0023] When the functional devices in each functional segment are connected in parallel, Figure 2 , the control function section 6 refers to instructing one or more valves Vz and the corresponding host to open, one or more valves Vh to open, valve VI to close, valve V2 to open, three-way regulating valve V3 to adjust, any one or more pumps P to open, the heat transfer medium is mixed in the refrigeration and heat function section 2 and the energy storage function section 4 and then flows to the heat exchange function section 9 to circulate, so as to realize any one or more refrigeration and heat of the series refrigeration and heat engine 1, any one or more series energy storage machines 3 to cool and heat, and any one or more series heat exchangers 8 to exchange heat. When the functional devices in each functional section are mixed in series and parallel, the corresponding functions can also be realized.

[0024] 3. Energy storage function section single cooling When the functional devices within each functional segment are connected in series, such as Figure 1 , the control function section 6 instructs valve VI to close and valve V2 to open according to user needs, the three-way valve V3 is adjusted, any one or more of the series pumps P are turned on, the refrigeration and heating function section 2 main machine is turned off, and the heat transfer medium transfers the cold and hot energy of the energy storage function section 4 to the heat exchange front section 9, so that the energy storage function section 4 can release cold and heat alone.

[0025] When all functional devices in each functional segment are connected, Figure 2, the control function section 6 means that according to the user's needs, the valve VI is closed, the valve V2 is opened, the three-way valve 3 is bypassed, one or more of the valves Vz are opened, and one or more of the valves Vh are opened, the main engine of the cooling and heating function section 2 is closed, and the heat transfer medium transfers the energy of the energy storage function section 4 to the heat exchange function section 9, so that any one or more of the series energy storage machines 3 can release cold or heat, and any one or more of the series heat exchangers 8 can exchange heat. When the functional devices in each functional section are mixed in series and parallel, the corresponding functions can also be realized.

[0026] 4. Refrigeration and heating function section: single supply of cooling and heating When the functional devices within each functional segment are connected in series, such as Figure 1 , control function section 6 according to user needs, valve VI is closed, valve V2 is opened, three-way valve V3 is directly opened, the main engine is turned on, any one or more of the series pumps P are turned on, and the heat transfer medium transfers the energy of the refrigeration and heat function section 2 to the heat exchange function section 9, realizing the refrigeration and heat function section 2 single cold supply.

[0027] When all functional devices in each functional segment are connected in parallel, Figure 2 , the control function section 6 refers to the command valve VI to close, valve V2 to open, three-way valve 3 to open, one or more valves Vz to open, one or more valves Vh to open, refrigeration and heating function section 2 to open the main engine, and the heat transfer medium transfers the energy of the refrigeration and heating function section 2 to the heat exchange function section 9 according to user needs, so as to realize the refrigeration and heating of any one or more series refrigeration and heat engines 1, and the heat exchange of any one or more series heat exchangers. When the functional devices in each functional section are mixed in series and parallel, the corresponding functions can also be realized.

[0028] In the above series connection, in order to meet user needs, there are two arrangements: the heat transfer medium flows out of the heat exchange functional section 9 and first flows through the refrigeration and heating functional section 2 (referred to as upstream) and first flows through the energy storage functional section 4 (referred to as downstream).

[0029] When the system is working on the load, when the cooling and heating function sections 2 and the energy storage function section 4 are connected in parallel (referred to as parallel connection), the following four working conditions can be realized respectively through the control of the control function section 6: 1. Single cold and heat storage When the functional devices within each functional segment are connected in series, such as Figure 3 ,Control function section 6 means that according to user needs, valve VI and valve V2 are opened, valve V3 is closed, any one or more of the primary pumps Pa are turned on, and the heat transfer medium circulates in the refrigeration and heating function section 2 and the energy storage function section 4 to achieve single cold and heat storage.

[0030] When all functional devices in each functional segment are connected in parallel, Figure 4The control function segment 6 can also instruct the host and the Vz, Vx, and Vh series valves to switch, realize any one or more refrigeration and heating machines 1, and any one or more energy storage machines 3. When the functional devices within each functional segment are mixed in series and parallel, the corresponding functions can also be realized.

[0031] 2. Energy storage and refrigeration, heat engine cooling, heat When the functional devices within each functional segment are connected in series, such as Figure 3 , the control function section 6, according to user needs, instructs valve VI to adjust, valve V2 to open, three-way regulating valve V3 to adjust, any one or more of the primary pumps Pa to open, any one or more of the secondary pumps Pb to open, and the heat transfer medium circulates in the refrigeration and heating function section 2, the energy storage function section 4 and the heat exchange function section 9 to achieve cold and heat storage and cold and heat release.

[0032] When all functional devices in each functional segment are connected in parallel, Figure 4 The control function segment 6 can also instruct the host and the Vz, Vx, and Vh series valves to switch, realize any one or more refrigeration and heating in the series refrigeration and heat engines 1, any one or more energy storage in the series energy storage machines 3, and any one or more heat exchange in the series heat exchangers 8. When the functional devices in each functional segment are mixed in series and parallel, the corresponding functions can also be realized.

[0033] 3. Energy storage function section cools and heats and cools and heats When the functional devices within each functional segment are connected in series, such as Figure 3 , valve VI and valve V2 are opened, the three-way regulating valve V3 is adjusted, any one or more of the primary pumps Pa are opened, any one or more of the secondary pumps Pb are opened, and the heat transfer medium in the energy storage function section 4 and the refrigeration and heating function section 2 merges and flows to the heat exchange function section 9 for circulation, realizing cooling, heating and cooling, heating.

[0034] When all functional devices in each functional segment are connected in parallel, Figure 4 The control function segment 6 can also instruct the host and the Vz, Vx, and Vh series valves to switch, so as to realize the cooling (heating) of any one or more series refrigeration and heat engines 1, the energy storage of any one or more series accumulators 3, and the heat exchange of any one or more series heat exchangers 8. When the functional devices within each functional segment are mixed in series and parallel, the corresponding functions can also be realized.

[0035] 4. Cool it down When the functional devices within each functional segment are connected in series, such as Figure 3, valve VI is opened, valve V2 is closed, three-way regulating valve V3 is adjusted, primary pump Pa is closed, any one or more of secondary pumps Pb are turned on, refrigeration and heating functional sections 2 are closed, and the heat transfer medium circulates between the energy storage functional section 4 and the heat exchange functional section 9 to achieve single cooling of the energy storage functional section 4.

[0036] When all functional devices in each functional segment are connected in parallel, Figure 4 The control function section 6 can also instruct the host and the Vz, Vx, and Vh series valve switches to realize any one or more refrigeration and heating series machines 1, any one or more energy storage series machines 3, and any one or more heat exchange series heat exchangers 8. When the functional devices within each functional section are mixed in series and parallel, the corresponding functions can also be realized.

[0037] 5. Refrigeration and heating function section: single supply of cooling and heating When the functional devices within each functional segment are connected in series, such as Figure 3 , valve VI is closed, valve V2 is opened, three-way valve 3 is adjusted, primary pump Pa is closed, any one or more of secondary pumps Pb are opened, and the heat transfer medium circulates between the refrigeration and heating functional sections 2 and the heat exchange functional section 9), realizing single cooling of the refrigeration and heating functional sections.

[0038] When all functional devices in each functional segment are connected in parallel, Figure 4 The control function segment 6 can also instruct the Vz.Vx.Vh series valve switches, any one or more of the series refrigeration and heat engines 1, and any one or more of the series heat exchangers 8 to exchange heat.

[0039] Under various working conditions, the control function section 6 automatically instructs valves such as the three-way regulating valve to make direct or bypass adjustments to the corresponding flow rates based on feedback data from temperature sensors at each process point, in order to adjust the temperature of the heat transfer medium accordingly to obtain the process parameter requirements required for each working condition.

Claims

1. An intelligent control method for an integrated heating energy storage unit, characterized in that: The device is composed of four functional sections, namely, a refrigeration and heating functional section (2), an energy storage functional section (4), a heat exchange functional section (9), and a control functional section (6), or a combination of two or three of the four functional sections. Each functional section is composed of one or more containers of the same or different sizes in which corresponding functional equipment is installed. Various pipelines and control lines are used between the containers between the functional sections and between the containers within each functional section, and are connected in series, parallel, or mixed series and parallel to form a closed circulation system.

2. The combined mechatronic energy storage central air conditioning unit according to claim 1 is characterized in that: The container can be box-shaped or cylindrical. Only one functional device or multiple functional devices can be installed in each container. The containers can be connected to each other as a whole by bolts and other connecting parts.

3. The combined mechatronic energy storage central air conditioning unit according to claim 1 is characterized in that: The refrigeration and heating functional section (2) is composed of one or more refrigeration and heating engines (1).

4. The combined mechatronic energy storage central air conditioning unit according to claim 3 is characterized in that: The refrigeration and heating engine (1) in the refrigeration and heating functional section (2) is composed of various compressors and condensers, throttling devices, evaporator refrigeration and heating equipment components installed in the above-mentioned container, and refrigeration and heating equipment of electric boilers can also be installed.

5. The combined mechatronic energy storage central air conditioning unit according to claim 1, characterized in that: The energy storage functional section (4) is composed of one or more energy storage machines (3), and the energy storage machine (3) is composed of a container and a heat insulation layer, an energy storage system, and a heat transfer system.

6. The combined mechatronic energy storage central air conditioning unit according to claim 5, characterized in that: The energy storage system can be a ball type or a coil type, and the energy storage method can be latent heat, sensible heat, or a combination of latent and sensible heat.

7. The combined mechatronic energy storage central air conditioning unit according to claim 1, characterized in that: The heat exchange functional section (9) is composed of one or more heat exchangers (8), and the heat exchanger (8) can be a plate heat exchanger, or a shell and tube heat exchanger, or a sleeve and tube heat exchanger.

8. The combined mechatronic energy storage central air conditioning unit according to claim 1, characterized in that: The control function section (6) is composed of an electromechanical device (7) and a control device (5).

9. The combined mechatronic energy storage central air conditioning unit according to claim 8 is characterized in that: The electromechanical equipment (7) is composed of one or more heat transfer medium pumps, an electric regulating valve, and a sensor.

10. The combined mechatronic energy storage central air conditioning unit according to claim 8, characterized in that: The control equipment (5) is divided into three parts: a front-end field control system, a back-end monitoring system, and a remote monitoring system. The front-end field monitoring system is composed of a programmable logic controller (PLC) system and a manual control device, and is connected to each functional section of the unit.

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