Energy-saving operation control method and device, electronic equipment and computer storage medium

Abstract

This application relates to the field of combined heat and power (CHP) technology, and discloses an energy-saving operation control method, device, electronic equipment, and computer storage medium. The method includes: acquiring a first power consumption and a first water flow rate of the CHP unit at a first time, and a first inlet-outlet water temperature difference value of the CHP unit at a first time; acquiring a second power consumption and a second water flow rate of the CHP unit at a second time, and a second inlet-outlet water temperature difference value of the CHP unit at a second time; acquiring the heat storage capacity of the water tank connected to the CHP unit at a second time; and controlling the CHP unit to perform energy-saving operation based on the first power consumption, the second power consumption, the first inlet-outlet water temperature difference value, the first water flow rate, the second inlet-outlet water temperature difference value, the second water flow rate, and the heat storage capacity of the water tank. The embodiments of this application can accurately control the CHP unit to perform energy-saving operation, avoid energy waste, and improve the operating energy efficiency of the CHP unit.

Description

Technical Field

[0001] This application relates to the field of combined heat and power technology, specifically to an energy-saving operation control method, device, electronic equipment, and computer storage medium. Background Technology

[0002] Currently, during heating operation, the start-stop logic of combined cooling, heating, and power (CCHP) units typically controls operation based on the temperature difference between the system outlet water temperature and the set initial outlet water temperature being greater than or equal to a preset temperature difference value. This fails to accurately control the cumulative heating capacity. Furthermore, the temperature difference between the system inlet and outlet water significantly impacts the cumulative heating capacity and power consumption of CCHP units. A high temperature difference results in low cumulative heating capacity and high power consumption. However, considering user comfort, the use of a high temperature difference inevitably leads to a rapid increase in the outlet water temperature, resulting in low overall energy efficiency for the CCHP unit. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the related art. To this end, embodiments of this application provide an energy-saving operation control method, device, electronic equipment, and computer storage medium, which can improve the overall energy efficiency of combined heat and power (CHP) units.

[0004] In a first aspect, embodiments of this application provide an energy-saving operation control method, including:

[0005] The first power consumption and first water flow of the combined heat and power unit at the first moment are obtained, as well as the first inlet and outlet water temperature difference of the combined heat and power unit at the first moment.

[0006] The second power consumption and second water flow rate of the combined heat and power unit at the second time are obtained, as well as the second inlet and outlet water temperature difference of the combined heat and power unit at the second time.

[0007] The heat storage capacity of the water tank connected to the combined heat and power unit at the second time is obtained;

[0008] Based on the first power consumption, the second power consumption, the first inlet and outlet water temperature difference, the first water flow rate, the second inlet and outlet water temperature difference, the second water flow rate, and the heat storage capacity of the water tank, the combined heat and power unit is controlled to operate in an energy-saving manner.

[0009] In one embodiment, controlling the combined heat and power unit to operate in an energy-saving manner based on the first power consumption, the second power consumption, the first inlet and outlet water temperature difference, the first water flow rate, the second inlet and outlet water temperature difference, the second water flow rate, and the heat storage capacity of the water tank includes:

[0010] Based on the first power consumption and the second power consumption, the cumulative power consumption of the combined heat and power unit is determined;

[0011] Based on the first inlet and outlet water temperature difference and the first water flow rate, the first heating capacity of the combined heat and power unit at the first time is determined, and based on the second inlet and outlet water temperature difference and the second water flow rate, the second heating capacity of the combined heat and power unit at the second time is determined.

[0012] Based on the first heating capacity and the second heating capacity, the cumulative heating capacity of the combined heat and power unit is determined;

[0013] Based on the cumulative power consumption, the cumulative heating capacity, and the heat storage capacity of the water tank, the combined heat and power unit is controlled to operate in an energy-saving manner.

[0014] In one embodiment, controlling the combined heat and power unit to operate in an energy-saving manner based on the cumulative power consumption, the cumulative heating capacity, and the heat storage capacity of the water tank includes:

[0015] Obtain the operating mode of the combined heat and power unit;

[0016] Based on the operating mode, the cumulative power consumption, and the cumulative heating capacity, the heat storage compensation amount of the combined heat and power unit for the water tank is determined;

[0017] Based on the heat storage compensation amount, the heat storage capacity of the water tank is compensated to obtain the original total heat storage capacity of the water tank after compensation.

[0018] The original total heat storage capacity of the water tank is adjusted at preset intervals until the final adjusted total heat storage capacity of the water tank reaches the preset total heat storage capacity, at which point the combined heat and power unit is controlled to enter the energy-saving operation mode.

[0019] In one embodiment, the energy-saving operation control method further includes:

[0020] Based on the operating mode, the cumulative power consumption, and the cumulative heating capacity, determine the water flow adjustment value and the inlet and outlet water temperature adjustment value of the combined heat and power unit;

[0021] The second water flow is adjusted based on the water flow adjustment value to obtain the final water flow of the combined heat and power unit;

[0022] The second inlet and outlet water temperature difference is adjusted based on the inlet and outlet water temperature adjustment value to obtain the final inlet and outlet water temperature difference value of the combined heat and power unit.

[0023] In one embodiment, after controlling the combined heat and power unit to enter the energy-saving operation mode, the method further includes:

[0024] Obtain the ambient temperature of the outdoor environment where the heat pump system of the combined heat and power unit is located;

[0025] The target water temperature value corresponding to the external ambient temperature is determined based on the mapping relationship between the preset water temperature value and the preset temperature range; each temperature range is obtained by dividing the temperature values ​​above and below the preset temperature threshold.

[0026] Based on the target water temperature value and the current water temperature value of the water tank, determine the water temperature difference in the water tank;

[0027] The operating mode of the combined heat and power unit is controlled based on the temperature difference of the water in the water tank.

[0028] In one embodiment, controlling the operating mode of the combined heat and power unit based on the water temperature difference in the water tank includes:

[0029] If the water temperature difference in the water tank is less than or equal to the preset temperature difference value, then the combined heat and power unit is controlled to maintain energy-saving operation mode; or,

[0030] If the water temperature difference in the water tank is greater than the preset temperature difference value, the combined heat and power unit is controlled to switch from the energy-saving operation mode to the first heating operation mode to compensate for the heat storage in the water tank until the water temperature difference in the water tank is less than or equal to the preset temperature difference value, and then the combined heat and power unit is controlled to switch from the first heating operation mode to the energy-saving operation mode.

[0031] In one embodiment, the energy-saving operation control method further includes:

[0032] Obtain the heating duration for heat storage compensation of the water tank based on the first heating operation mode;

[0033] If the heating time reaches the preset time and the water temperature difference in the water tank is greater than the preset temperature difference, the combined heat and power unit will be switched from the first heating operation mode to the second heating operation mode; wherein the heating power of the second heating operation mode is greater than the heating power when switching from the first heating operation mode.

[0034] Secondly, embodiments of this application provide an energy-saving operation control device, comprising:

[0035] The first acquisition module is used to acquire the first power consumption and first water flow of the combined heat and power unit at the first time, as well as the first inlet and outlet water temperature difference of the combined heat and power unit at the first time.

[0036] The second acquisition module is used to acquire the second power consumption and second water flow of the combined heat and power unit at the second time, as well as the second inlet and outlet water temperature difference of the combined heat and power unit at the second time.

[0037] The third acquisition module is used to acquire the heat storage capacity of the water tank connected to the combined heat and power unit at the second time.

[0038] The energy-saving operation control module is used to control the combined heat and power unit to operate in an energy-saving manner based on the first power consumption, the second power consumption, the first inlet and outlet water temperature difference, the first water flow rate, the second inlet and outlet water temperature difference, the second water flow rate, and the heat storage capacity of the water tank.

[0039] Thirdly, embodiments of this application also provide an electronic device, including a memory storing multiple computer programs; a processor loads the computer programs from the memory to execute any of the energy-saving operation control methods provided in embodiments of this application.

[0040] Fourthly, embodiments of this application also provide a computer-readable storage medium storing multiple computer programs adapted for loading by a processor to execute any of the energy-saving operation control methods provided in embodiments of this application.

[0041] Fifthly, embodiments of this application also provide a computer program product, which includes a computer program that, when executed by a processor, implements any of the energy-saving operation control methods provided in embodiments of this application.

[0042] This application embodiment accurately controls the combined heat and power unit to operate in an energy-saving manner by using the first power consumption, first inlet and outlet water temperature difference, and first water flow rate of the combined heat and power unit at the first time, the second power consumption, second inlet and outlet water temperature difference, and second water flow rate of the combined heat and power unit at the second time, and the heat storage capacity of the water tank at the second time. This avoids energy waste of the combined heat and power unit and improves its operating energy efficiency. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is one of the flowcharts illustrating the energy-saving operation control method provided in the embodiments of this application;

[0045] Figure 2 This is the second flowchart illustrating the energy-saving operation control method provided in the embodiments of this application;

[0046] Figure 3 This is the third flowchart illustrating the energy-saving operation control method provided in the embodiments of this application;

[0047] Figure 4 This is the fourth flowchart illustrating the energy-saving operation control method provided in the embodiments of this application;

[0048] Figure 5 This is a schematic diagram of the energy-saving operation control device provided in the embodiments of this application;

[0049] Figure 6 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. At the same time, in the description of the embodiments of this application, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0051] This application provides an energy-saving operation control method, apparatus, electronic device, and computer storage medium. Specifically, this application will be described from the perspective of an energy-saving operation control device, which may include an air conditioning unit, a combined heat and power supply unit, etc.

[0052] It should be noted that the order of description in the following embodiments is not intended to limit the preferred order of embodiments. Although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than that shown in the figures.

[0053] This application uses a combined cooling, heating, and power supply (CCHP) device as an example for illustration, and the following detailed description is provided in conjunction with the accompanying drawings. Optionally, the CCHP device in this application embodiment can be a CCHP unit, which can be used to supply cooling, heating, and domestic hot water to meet different usage needs.

[0054] Optional, see reference Figure 1 , Figure 1 This is one of the flowcharts illustrating the energy-saving operation control method provided in this application embodiment. The specific flow of the energy-saving operation control method provided in this application embodiment can be as follows: steps 10 to 40, including:

[0055] Step 10: Obtain the first power consumption and first water flow rate of the combined heat and power unit at the first moment, as well as the first inlet and outlet water temperature difference of the combined heat and power unit at the first moment.

[0056] Optionally, the combined heat and power (CHP) unit acquires the first power consumption and first water flow rate of the CHP unit at a first moment, as well as the first inlet and outlet water temperature difference at a first moment, where the first moment refers to the time when the CHP unit starts heating. Therefore, it can be understood that when the CHP unit starts heating, the first power consumption and first water flow rate of the CHP unit, as well as the inlet and outlet water temperatures of the CHP unit, are acquired, and the first inlet and outlet water temperature difference at the start of heating is calculated based on the outlet and inlet temperatures. That is, the first inlet and outlet water temperature difference = outlet temperature at the start of heating - inlet temperature at the start of heating, where power consumption is the power consumption.

[0057] Step 20: Obtain the second power consumption and second water flow rate of the combined heat and power unit at the second time, as well as the second inlet and outlet water temperature difference of the combined heat and power unit at the second time.

[0058] Optionally, the cogeneration unit acquires its second power consumption and second water flow rate at a second time, as well as the second inlet and outlet water temperature difference at the second time. This second time is the time when the cogeneration unit's operating mode needs to be adjusted. Therefore, it can be understood that when the cogeneration unit's operating mode needs to be adjusted, the second power consumption and second water flow rate of the cogeneration unit, along with the inlet and outlet water temperatures, are acquired. Based on these temperatures, the second inlet and outlet water temperature difference is calculated when the cogeneration unit's operating mode is adjusted. That is, the second inlet and outlet water temperature difference = outlet temperature at the time of operating mode adjustment - inlet temperature at the time of operating mode adjustment.

[0059] Step 30: Obtain the heat storage capacity of the water tank connected to the combined heat and power unit at the second time.

[0060] Optionally, the combined heat and power (CHP) unit acquires the heat storage capacity of the water tank connected to the CHP unit at a second time, i.e., when adjusting the operating mode of the CHP unit, it acquires the water temperature value of the water tank and calculates the heat storage capacity of the water tank based on the water temperature value. In one embodiment, the heat storage capacity of the water tank = mass * specific heat capacity * water temperature value, where mass refers to the mass of water in the tank, in kilograms; specific heat capacity refers to the specific heat capacity of water, in joules per kilogram per degree Celsius (J / (kg·℃)); and water temperature value is the water temperature value of the water in the tank, in degrees Celsius. For example, if the water tank contains 10 kilograms of water, the specific heat capacity of water is 4182 J / (kg·℃), and the water temperature value is 30℃, then the heat storage capacity of the water tank = 10 kg * 4182 J / (kg·℃) * 30℃ = 125460 J (joules).

[0061] Step 40: Based on the first power consumption, the second power consumption, the first inlet and outlet water temperature difference, the first water flow rate, the second inlet and outlet water temperature difference, the second water flow rate, and the heat storage capacity of the water tank, control the combined heat and power unit to operate in an energy-saving manner.

[0062] Optionally, the combined heat and power unit can be controlled to operate in an energy-saving manner based on the first power consumption, the second power consumption, the first inlet and outlet water temperature difference, the first water flow rate, the second inlet and outlet water temperature difference, the second water flow rate, and the heat storage capacity of the water tank, as described in steps 401 to 404.

[0063] This application embodiment accurately controls the combined heat and power unit to operate in an energy-saving manner by using the first power consumption, first inlet and outlet water temperature difference, and first water flow rate of the combined heat and power unit at the first time, the second power consumption, second inlet and outlet water temperature difference, and second water flow rate of the combined heat and power unit at the second time, and the heat storage capacity of the water tank at the second time. This avoids energy waste of the combined heat and power unit and improves its operating energy efficiency.

[0064] In an optional example, steps 401 to 404 are described as follows:

[0065] Step 401: Determine the cumulative power consumption of the combined heat and power (CHP) unit based on the first power consumption and the second power consumption;

[0066] Step 402: Based on the first inlet and outlet water temperature difference and the first water flow rate, determine the first heating capacity of the combined heat and power unit at the first time, and based on the second inlet and outlet water temperature difference and the second water flow rate, determine the second heating capacity of the combined heat and power unit at the second time.

[0067] Step 403: Determine the cumulative heating capacity of the combined heat and power unit based on the first and second heating capacities;

[0068] Step 404: Based on the cumulative power consumption, cumulative heating capacity, and water tank heat storage, control the combined heat and power unit to operate in an energy-saving manner.

[0069] Optionally, the combined heat and power (CHP) unit determines the cumulative power consumption of the CHP unit from the first time period to the second time period based on the first power consumption and the second power consumption, i.e., the cumulative power consumption P = P1 - P2, where P1 is the first power consumption at the first time period and P2 is the second power consumption at the second time period.

[0070] Optionally, the combined heat and power unit calculates the first heating capacity Q1 at the first time based on the first inlet and outlet water temperature difference and the first water flow rate. In one embodiment, the first heating capacity Q1 = specific heat capacity of water * density of water * (first water flow rate / 3600) * first inlet and outlet water temperature difference. Similarly, the combined heat and power unit determines the second heating capacity Q2 at the second time based on the second inlet and outlet water temperature difference and the second water flow rate.

[0071] Optionally, the combined heat and power (CHP) unit calculates the cumulative heat production from the first time point to the second time point based on the first heat production Q1 and the second heat production Q2. That is, the cumulative heat production Q = second heat production Q2 - first heat production Q1. Therefore, the formula for calculating the cumulative heat production of the CHP unit from the first time point to the second time point can be understood as follows:

[0072]

[0073] Where t1 is the first time, t2 is the second time, c is the specific heat capacity of water, ρ is the density of water, L is the water flow rate, and t 进出水温差 This represents the temperature difference between the inlet and outlet water.

[0074] Optionally, the combined heat and power unit can be controlled to operate in an energy-saving manner based on the cumulative power consumption, cumulative heating capacity and water tank heat storage, as described in steps 4041 to 4044.

[0075] This application embodiment accurately controls the combined heat and power unit to operate in an energy-saving manner by using the first power consumption, first inlet and outlet water temperature difference, and first water flow rate of the combined heat and power unit at the first time, the second power consumption, second inlet and outlet water temperature difference, and second water flow rate of the combined heat and power unit at the second time, and the heat storage capacity of the water tank at the second time. This avoids energy waste of the combined heat and power unit and improves its operating energy efficiency.

[0076] In an optional example, steps 4041 to 4044 are described as follows:

[0077] Step 4041: Obtain the operating mode of the combined heat and power (CHP) unit;

[0078] Step 4042: Based on the operating mode, cumulative power consumption, and cumulative heating capacity, determine the amount of heat storage compensation for the water tank by the combined heat and power unit;

[0079] Step 4043: Compensate the heat storage capacity of the water tank based on the heat storage compensation amount to obtain the original total heat storage capacity of the water tank after compensation.

[0080] Step 4044: The original total heat storage of the water tank is adjusted at preset intervals until the final heat storage of the water tank reaches the preset total heat storage, and the combined heat and power unit is controlled to enter the energy-saving operation mode.

[0081] Optionally, the cogeneration unit acquires its current operating mode, which may include initial heating mode and restart heating mode. Initial heating mode refers to the initial operation of the cogeneration unit. In this mode, the unit heats the incoming cold water to the set hot water temperature according to the set temperature requirements and outputs it. This process involves water heating, hence the name "heating mode." In initial heating mode, the unit typically takes a longer time to reach the set hot water temperature because it needs to fully heat the water throughout the system. Restart heating mode refers to the operating mode used when the cogeneration unit restarts after a period of continuous operation due to reasons such as power outages, malfunctions, or maintenance. In restart heating mode, the unit heats the incoming cold water to the set hot water temperature based on the current system status and water temperature. Unlike initial heating mode, the unit in restart heating mode has already maintained a certain hot water temperature during previous operation, so it can reach the set hot water temperature more quickly after restarting.

[0082] Furthermore, the combined heat and power unit matches the operating mode, cumulative power consumption P, and cumulative heating capacity Q in a preset heat storage compensation table to obtain the heat storage compensation amount of the combined heat and power unit for the water tank. In one embodiment, the preset heat storage compensation table is shown in Table 1, where a and b are the preset cumulative power consumption and preset cumulative heating capacity, respectively.

[0083] Table 1 Preset Heat Storage Compensation Amount

[0084]

[0085] Furthermore, the combined heat and power unit compensates for the heat storage in the water tank based on the heat storage compensation amount, and obtains the original total heat storage in the water tank after compensation, that is, the original total heat storage in the water tank = Q water tank + Q compensation, where Q water tank is the heat storage in the water tank, Q compensation is the heat storage compensation amount, and Q compensation can be a positive number or a negative number.

[0086] Furthermore, the combined heat and power (CHP) unit adjusts the original total heat storage capacity of the water tank at preset intervals until the adjusted final total heat storage capacity reaches the preset total heat storage capacity, at which point the CHP unit enters energy-saving operation mode. The preset interval is set according to actual conditions, such as 30 minutes or 1 hour. The preset total heat storage capacity is set based on the water tank capacity and energy-saving temperature; for example, if the water tank capacity is 10L and the energy-saving temperature is 50℃, the preset total heat storage capacity is 2091000J. Therefore, it can be understood that at preset intervals, the original total heat storage capacity of the water tank is increased or decreased by a preset amount until the adjusted final total heat storage capacity reaches the preset total heat storage capacity, at which point the CHP unit enters energy-saving operation mode.

[0087] The embodiments of this application accurately control the combined heat and power (CHP) unit to achieve energy-saving operation by controlling the operating mode, cumulative power consumption, and cumulative heating capacity, thereby avoiding energy waste and improving the operating efficiency of the CHP unit.

[0088] Optionally, to avoid energy waste, it is necessary to adjust the water flow rate and inlet / outlet water temperature difference of the combined heat and power unit, referring to... Figure 2 , Figure 2 This is the second flowchart of the energy-saving operation control method provided in the embodiments of this application, specifically including steps 50 to 70:

[0089] Step 50: Based on the operating mode, cumulative power consumption, and cumulative heating capacity, determine the water flow adjustment value and inlet / outlet water temperature adjustment value for the combined heat and power unit;

[0090] Step 60: Adjust the second water flow rate based on the water flow rate adjustment value to obtain the final water flow rate of the combined heat and power unit;

[0091] Step 70: Adjust the second inlet and outlet water temperature difference based on the inlet and outlet water temperature adjustment value to obtain the final inlet and outlet water temperature difference of the combined heat and power unit.

[0092] Optionally, the combined heat and power unit matches the operating mode, cumulative power consumption, and cumulative heating capacity in a preset water flow adjustment value table to obtain the water flow adjustment value of the combined heat and power unit. In one embodiment, the preset water flow adjustment value table is shown in Table 2, where a and b are the preset cumulative power consumption and preset cumulative heating capacity, respectively.

[0093] Table 2 Preset Water Flow Adjustment Values

[0094]

[0095] Optionally, the combined heat and power unit matches the inlet and outlet water temperature adjustment values ​​in a preset table based on the operating mode, cumulative power consumption, and cumulative heating capacity to obtain the inlet and outlet water temperature adjustment values ​​of the combined heat and power unit. In one embodiment, the preset inlet and outlet water temperature adjustment value table is shown in Table 3.

[0096] Table 3 Preset Inlet and Outlet Water Temperature Adjustment Values

[0097]

[0098]

[0099] Furthermore, the combined heat and power (CHP) unit adjusts the second water flow rate according to the water flow rate adjustment value to obtain the final water flow rate of the CHP unit, that is, the water flow rate of the CHP unit is increased or decreased according to the water flow rate adjustment value.

[0100] At the same time, the combined heat and power unit adjusts the second inlet and outlet water temperature difference value according to the inlet and outlet water temperature adjustment value to obtain the final inlet and outlet water temperature difference value of the combined heat and power unit. That is, the inlet and outlet water temperature difference value of the combined heat and power unit is increased or decreased according to the inlet and outlet water temperature adjustment value.

[0101] In this embodiment, when the cumulative heating capacity reaches the required level, the water flow rate is reduced and the inlet and outlet water temperature difference is increased, enabling the combined heat and power unit to reach the required temperature and shut down in a timely manner, thus avoiding energy waste and improving the operating efficiency of the combined heat and power unit. When the cumulative heating capacity does not reach the required level, the water flow rate is increased and the inlet and outlet water temperature difference is reduced. A smaller inlet and outlet water temperature difference results in higher cumulative heating capacity and higher energy efficiency, thereby improving the operating efficiency of the combined heat and power unit.

[0102] Optional, see reference Figure 3 , Figure 3 This is the third flowchart of the energy-saving operation control method provided in the embodiments of this application, which can be specifically understood as:

[0103] (1) When the combined heat and power unit starts heating mode, the combined heat and power unit sets the outlet water temperature. Before the combined heat and power unit stabilizes heating, the running time t1 is used to detect the water temperature value in the water tank and determine the water tank heat storage capacity as Q water tank.

[0104] (2) Detect the cumulative power consumption and cumulative heat generation to determine the level of heat storage in the water tank;

[0105] (3) When the cumulative power consumption P is greater than a and the cumulative heating capacity Q is greater than b, determine the level 1 of the heat storage capacity in the water tank. At this time, the heat storage compensation amount is Q compensation 1. Enter compensation mode 1. After compensating Q water tank, the original heat storage capacity of the water tank after compensation is obtained = Q water tank + Q compensation 1. Adjust the water flow rate of the combined heat and power unit to L1 (m 3 / h), reduce instantaneous heating capacity, increase the temperature difference between the inlet and outlet water of the combined heat and power unit, Q compensation 1 compensation decreases by X after each cumulative compensation time T, until the final corrected total heat storage of the water tank reaches the preset upper limit of the total heat storage of the water tank, and the combined heat and power unit enters the energy-saving operation mode.

[0106] (4) When the cumulative power consumption P is greater than a and the cumulative heating capacity Q is less than or equal to b, determine the level 2 of the heat storage capacity of the water tank. At this time, the heat storage compensation amount is Q compensation 2. Enter compensation mode 2. After compensating Q water tank, the original heat storage capacity of the water tank after compensation is obtained = Q water tank + Q compensation 2. Adjust the water flow rate of the combined heat and power unit to L2 (m 3 / h), increase instantaneous heating capacity, reduce the temperature difference between the inlet and outlet water of the combined heat and power unit, Q compensation 2 compensation increases by X after each cumulative compensation time T, until the final corrected total heat storage of the water tank reaches the preset upper limit of the total heat storage of the water tank, and the combined heat and power unit enters the energy-saving operation mode.

[0107] (5) After the combined heat and power unit enters the energy-saving operation mode and stops, before the combined heat and power unit restarts and operates stably for heating, the water temperature value of the water tank is detected during the running time t2, and the heat storage capacity of the water tank is determined to be Q water tank.

[0108] (6) When the cumulative power consumption P is greater than a and the cumulative heating capacity Q is greater than b, determine the water tank's heat storage level as 3. At this time, the heat storage compensation amount is Q compensation 3. Enter compensation mode 3. After compensating Q water tank, obtain the original heat storage total of the water tank after compensation = Q water tank + Q compensation 3. Adjust the water flow rate of the combined heat and power unit to L3 (m³). 3 / h), reduce instantaneous heating capacity, increase the temperature difference between the inlet and outlet water of the combined heat and power unit, Q compensation 3 compensation decreases by X after each cumulative compensation time T, until the final corrected total heat storage of the water tank reaches the preset upper limit of the total heat storage of the water tank, and the combined heat and power unit enters the energy-saving operation mode.

[0109] (7) When the cumulative power consumption P is greater than a and the cumulative heating capacity Q is less than or equal to b, determine the heat storage level of the water tank as 4. At this time, the heat storage compensation amount is Q compensation 4. Enter compensation mode 4. After compensating Q water tank, the original heat storage amount of the water tank after compensation is obtained = Q water tank + Q compensation 4. Adjust the water flow rate of the combined heat and power unit to L4 (m 3 / h), increase instantaneous heating capacity, reduce the temperature difference between the inlet and outlet water of the combined heat and power unit, Q compensation 4 compensation increases by X after each cumulative compensation time T, until the final corrected total heat storage of the water tank reaches the preset upper limit of the total heat storage of the water tank, and the combined heat and power unit enters the energy-saving operation mode.

[0110] Therefore, this embodiment of the application determines the heat storage capacity of the water tank by detecting the water temperature value of the water tank, and simultaneously compensates for the heat storage capacity of the water tank by controlling the water flow of the combined heat and power unit. When the cumulative heat production reaches the required level, the water flow is reduced to increase the temperature difference between the inlet and outlet water, thus avoiding energy waste and improving the operating efficiency of the combined heat and power unit. When the cumulative heat production does not reach the required level, the water flow is increased to reduce the temperature difference between the inlet and outlet water, thereby improving the operating efficiency of the combined heat and power unit.

[0111] Optional, see reference Figure 4 , Figure 4 This is the fourth flowchart of the energy-saving operation control method provided in the embodiments of this application, specifically including steps 80 to 110:

[0112] Step 80: Obtain the ambient temperature of the outdoor environment where the heat pump system of the combined heat and power unit is located;

[0113] Step 90: Determine the target water temperature value corresponding to the ambient temperature based on the mapping relationship between the preset water temperature value and the preset temperature range;

[0114] Step 100: Determine the water temperature difference in the water tank based on the target water temperature value and the current water temperature value in the water tank;

[0115] Step 110: Control the operating mode of the combined heat and power unit based on the water temperature difference in the water tank.

[0116] Optionally, the combined heat and power (CHP) unit acquires the ambient temperature of the outdoor environment where the CHP unit's heat pump system is located via a temperature sensor, and determines the target water temperature value corresponding to the ambient temperature based on the mapping relationship between a preset water temperature value and a preset temperature range. Each temperature range is obtained by dividing the temperature values ​​above and below a preset temperature threshold. In one embodiment, the mapping relationship between the preset water temperature value and the preset temperature range is shown in Table 4.

[0117] Table 4. Mapping relationship between preset water temperature value and preset temperature range

[0118] The preset temperature range is <T1 Preset temperature range [T1, T2) Preset temperature range > T2 Preset water temperature value 1 Preset water temperature value 2 Preset water temperature value 3

[0119] Furthermore, the combined heat and power unit determines the water tank temperature difference based on the target water temperature value and the current water temperature value in the water tank, i.e., water tank temperature difference = target water temperature value - current water temperature value, and controls the operating mode of the combined heat and power unit based on the water tank temperature difference, as described in steps 1101 to 1102.

[0120] This application embodiment controls the operation mode of the combined heat and power unit by using the ambient temperature and the current water temperature in the water tank, thereby avoiding energy waste and improving the operating efficiency of the combined heat and power unit.

[0121] In an optional example, steps 1101 to 1102 are described as follows:

[0122] Step 1101: If the water temperature difference in the tank is less than or equal to the preset temperature difference value, then control the combined heat and power unit to maintain energy-saving operation mode; or,

[0123] Step 1102: If the water temperature difference in the water tank is greater than the preset temperature difference value, the combined heat and power unit is controlled to switch from the energy-saving operation mode to the first heating operation mode to compensate for the heat storage in the water tank until the water temperature difference in the water tank is less than or equal to the preset temperature difference value, and then the combined heat and power unit is controlled to switch from the first heating operation mode to the energy-saving operation mode.

[0124] Optionally, if the water temperature difference in the tank is less than or equal to the preset temperature difference, it means that the outdoor temperature and the water temperature in the tank are not significantly different, and the combined heat and power unit will control the combined heat and power unit to maintain energy-saving operation mode.

[0125] If the water temperature difference in the tank exceeds the preset temperature difference, it indicates a significant difference between the outdoor temperature and the water temperature in the tank. To avoid energy waste and improve the operating efficiency of the combined heat and power unit, the unit switches from energy-saving mode to the first heating mode to compensate for the heat storage in the tank until the water temperature difference is less than or equal to the preset temperature difference. Then, the unit switches back to energy-saving mode. Simultaneously, during the heat storage compensation process in the first heating mode, the unit obtains the heating duration. If the heating duration reaches the preset duration and the water temperature difference exceeds the preset temperature difference, the unit switches from the first heating mode to the second heating mode. The second heating mode compensates for the heat storage in the tank, and its heating power is greater than the heating power required to switch from the first heating mode.

[0126] This application embodiment controls the operation mode of the combined heat and power unit by using the ambient temperature and the current water temperature in the water tank, thereby avoiding energy waste and improving the operating efficiency of the combined heat and power unit.

[0127] The energy-saving operation control device provided in the embodiments of this application is described below. The energy-saving operation control device described below can be referred to in correspondence with the energy-saving operation control method described above.

[0128] Reference Figure 5 As shown, Figure 5 This is a schematic diagram of the energy-saving operation control device provided in the embodiments of this application. The energy-saving operation control device may include:

[0129] The first acquisition module 501 is used to acquire the first power consumption and first water flow of the combined power generation unit at the first time, as well as the first inlet and outlet water temperature difference of the combined power generation unit at the first time.

[0130] The second acquisition module 502 is used to acquire the second power consumption and second water flow of the combined power unit at the second time, as well as the second inlet and outlet water temperature difference of the combined power unit at the second time.

[0131] The third acquisition module 503 is used to acquire the heat storage of the water tank connected to the combined heat and power unit at the second time.

[0132] The energy-saving operation control module 504 is used to control the combined heat and power unit to operate in an energy-saving manner based on the first power consumption, the second power consumption, the first inlet and outlet water temperature difference, the first water flow rate, the second inlet and outlet water temperature difference, the second water flow rate, and the heat storage capacity of the water tank.

[0133] This application embodiment accurately controls the combined heat and power unit to operate in an energy-saving manner by using the first power consumption, first inlet and outlet water temperature difference, and first water flow rate of the combined heat and power unit at the first time, the second power consumption, second inlet and outlet water temperature difference, and second water flow rate of the combined heat and power unit at the second time, and the heat storage capacity of the water tank at the second time. This avoids energy waste of the combined heat and power unit and improves its operating energy efficiency.

[0134] In an optional example, the energy-saving operation control module 504 is also used for:

[0135] Based on the first power consumption and the second power consumption, the cumulative power consumption of the combined heat and power unit is determined;

[0136] Based on the first inlet and outlet water temperature difference and the first water flow rate, the first heating capacity of the combined heat and power unit at the first time is determined, and based on the second inlet and outlet water temperature difference and the second water flow rate, the second heating capacity of the combined heat and power unit at the second time is determined.

[0137] Based on the first heating capacity and the second heating capacity, the cumulative heating capacity of the combined heat and power unit is determined;

[0138] Based on the cumulative power consumption, the cumulative heating capacity, and the heat storage capacity of the water tank, the combined heat and power unit is controlled to operate in an energy-saving manner.

[0139] In an optional example, the energy-saving operation control module 504 is also used for:

[0140] Obtain the operating mode of the combined heat and power unit;

[0141] Based on the operating mode, the cumulative power consumption, and the cumulative heating capacity, the heat storage compensation amount of the combined heat and power unit for the water tank is determined;

[0142] Based on the heat storage compensation amount, the heat storage capacity of the water tank is compensated to obtain the original total heat storage capacity of the water tank after compensation.

[0143] The original total heat storage capacity of the water tank is adjusted at preset intervals until the final adjusted total heat storage capacity of the water tank reaches the preset total heat storage capacity, at which point the combined heat and power unit is controlled to enter the energy-saving operation mode.

[0144] In an optional example, the energy-saving operation control device is also used for:

[0145] Based on the operating mode, the cumulative power consumption, and the cumulative heating capacity, determine the water flow adjustment value and the inlet and outlet water temperature adjustment value of the combined heat and power unit;

[0146] The second water flow is adjusted based on the water flow adjustment value to obtain the final water flow of the combined heat and power unit;

[0147] The second inlet and outlet water temperature difference is adjusted based on the inlet and outlet water temperature adjustment value to obtain the final inlet and outlet water temperature difference value of the combined heat and power unit.

[0148] In an optional example, the energy-saving operation control device is also used for:

[0149] Obtain the ambient temperature of the outdoor environment where the heat pump system of the combined heat and power unit is located;

[0150] The target water temperature value corresponding to the external ambient temperature is determined based on the mapping relationship between the preset water temperature value and the preset temperature range; each temperature range is obtained by dividing the temperature values ​​above and below the preset temperature threshold.

[0151] Based on the target water temperature value and the current water temperature value of the water tank, determine the water temperature difference in the water tank;

[0152] The operating mode of the combined heat and power unit is controlled based on the temperature difference of the water in the water tank.

[0153] In an optional example, the energy-saving operation control device is also used for:

[0154] If the water temperature difference in the water tank is less than or equal to the preset temperature difference value, then the combined heat and power unit is controlled to maintain energy-saving operation mode; or,

[0155] If the water temperature difference in the water tank is greater than the preset temperature difference value, the combined heat and power unit is controlled to switch from the energy-saving operation mode to the first heating operation mode to compensate for the heat storage in the water tank until the water temperature difference in the water tank is less than or equal to the preset temperature difference value, and then the combined heat and power unit is controlled to switch from the first heating operation mode to the energy-saving operation mode.

[0156] In an optional example, the energy-saving operation control device is also used for:

[0157] Obtain the heating duration for heat storage compensation of the water tank based on the first heating operation mode;

[0158] If the heating time reaches the preset time and the water temperature difference in the water tank is greater than the preset temperature difference, the combined heat and power unit will be switched from the first heating operation mode to the second heating operation mode; wherein the heating power of the second heating operation mode is greater than the heating power when switching from the first heating operation mode.

[0159] The specific embodiments of the energy-saving operation control device and the various embodiments of the energy-saving operation control method provided in this application are basically the same, and will not be described in detail here.

[0160] Optional, such as Figure 6 As shown, Figure 6This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may include: a processor 610, a communication interface 620, a memory 630, and a communication bus 640, wherein the processor 610, the communication interface 620, and the memory 630 communicate with each other via the communication bus 640. The processor 610 can call a computer program in the memory 630 to execute the steps of an energy-saving operation control method, such as including:

[0161] The first power consumption and first water flow of the combined heat and power unit at the first moment are obtained, as well as the first inlet and outlet water temperature difference of the combined heat and power unit at the first moment.

[0162] The second power consumption and second water flow rate of the combined heat and power unit at the second time are obtained, as well as the second inlet and outlet water temperature difference of the combined heat and power unit at the second time.

[0163] The heat storage capacity of the water tank connected to the combined heat and power unit at the second time is obtained;

[0164] Based on the first power consumption, the second power consumption, the first inlet and outlet water temperature difference, the first water flow rate, the second inlet and outlet water temperature difference, the second water flow rate, and the heat storage capacity of the water tank, the combined heat and power unit is controlled to operate in an energy-saving manner.

[0165] Furthermore, the logical computer program in the aforementioned memory 630 can be implemented as a software functional unit and sold or used as an independent product, and can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several computer programs to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0166] On the other hand, embodiments of this application also provide a non-transitory computer-readable storage medium, which includes a computer program. The computer program can be stored on the non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can perform the steps of the energy-saving operation control method provided in the above embodiments, such as including:

[0167] The first power consumption and first water flow of the combined heat and power unit at the first moment are obtained, as well as the first inlet and outlet water temperature difference of the combined heat and power unit at the first moment.

[0168] The second power consumption and second water flow rate of the combined heat and power unit at the second time are obtained, as well as the second inlet and outlet water temperature difference of the combined heat and power unit at the second time.

[0169] The heat storage capacity of the water tank connected to the combined heat and power unit at the second time is obtained;

[0170] Based on the first power consumption, the second power consumption, the first inlet and outlet water temperature difference, the first water flow rate, the second inlet and outlet water temperature difference, the second water flow rate, and the heat storage capacity of the water tank, the combined heat and power unit is controlled to operate in an energy-saving manner.

[0171] In another aspect, embodiments of this application also provide a computer product, which includes a computer program. The computer program can be stored on the computer product, and when the computer program is executed by a processor, the computer can perform the steps of the energy-saving operation control method provided in the above embodiments, such as including:

[0172] The first power consumption and first water flow of the combined heat and power unit at the first moment are obtained, as well as the first inlet and outlet water temperature difference of the combined heat and power unit at the first moment.

[0173] The second power consumption and second water flow rate of the combined heat and power unit at the second time are obtained, as well as the second inlet and outlet water temperature difference of the combined heat and power unit at the second time.

[0174] The heat storage capacity of the water tank connected to the combined heat and power unit at the second time is obtained;

[0175] Based on the first power consumption, the second power consumption, the first inlet and outlet water temperature difference, the first water flow rate, the second inlet and outlet water temperature difference, the second water flow rate, and the heat storage capacity of the water tank, the combined heat and power unit is controlled to operate in an energy-saving manner.

[0176] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0177] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several computer programs to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0178] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An energy-saving operation control method, characterized in that, include: The first power consumption and first water flow of the combined heat and power unit at the first moment are obtained, as well as the first inlet and outlet water temperature difference of the combined heat and power unit at the first moment. The second power consumption and second water flow rate of the combined heat and power unit at the second time are obtained, as well as the second inlet and outlet water temperature difference of the combined heat and power unit at the second time. The heat storage capacity of the water tank connected to the combined heat and power unit at the second time is obtained; Based on the first power consumption and the second power consumption, the cumulative power consumption of the combined heat and power unit is determined; Based on the first inlet and outlet water temperature difference and the first water flow rate, the first heating capacity of the combined heat and power unit at the first time is determined, and based on the second inlet and outlet water temperature difference and the second water flow rate, the second heating capacity of the combined heat and power unit at the second time is determined. Based on the first heating capacity and the second heating capacity, the cumulative heating capacity of the combined heat and power unit is determined; Obtain the operating mode of the combined heat and power unit; Based on the operating mode, the cumulative power consumption, and the cumulative heating capacity, the heat storage compensation amount of the combined heat and power unit for the water tank is determined; Based on the heat storage compensation amount, the heat storage capacity of the water tank is compensated to obtain the original total heat storage capacity of the water tank after compensation. The original total heat storage capacity of the water tank is adjusted at preset intervals until the final adjusted total heat storage capacity of the water tank reaches the preset total heat storage capacity, at which point the combined heat and power unit is controlled to enter the energy-saving operation mode.

2. The energy-saving operation control method according to claim 1, characterized in that, The energy-saving operation control method also includes: Based on the operating mode, the cumulative power consumption, and the cumulative heating capacity, determine the water flow adjustment value and the inlet and outlet water temperature adjustment value of the combined heat and power unit; The second water flow is adjusted based on the water flow adjustment value to obtain the final water flow of the combined heat and power unit; The second inlet and outlet water temperature difference is adjusted based on the inlet and outlet water temperature adjustment value to obtain the final inlet and outlet water temperature difference value of the combined heat and power unit.

3. The energy-saving operation control method according to any one of claims 1 to 2, characterized in that, After controlling the combined heat and power unit to enter the energy-saving operation mode, the method further includes: Obtain the ambient temperature of the outdoor environment where the heat pump system of the combined heat and power unit is located; The target water temperature value corresponding to the external ambient temperature is determined based on the mapping relationship between the preset water temperature value and the preset temperature range; each temperature range is obtained by dividing the temperature values ​​above and below the preset temperature threshold. Based on the target water temperature value and the current water temperature value of the water tank, determine the water temperature difference in the water tank; The operating mode of the combined heat and power unit is controlled based on the temperature difference of the water in the water tank.

4. The energy-saving operation control method according to claim 3, characterized in that, The method of controlling the operation mode of the combined heat and power unit based on the water temperature difference in the water tank includes: If the water temperature difference in the water tank is less than or equal to the preset temperature difference value, then the combined heat and power unit is controlled to maintain energy-saving operation mode; or, If the water temperature difference in the water tank is greater than the preset temperature difference value, the combined heat and power unit is controlled to switch from the energy-saving operation mode to the first heating operation mode to compensate for the heat storage in the water tank until the water temperature difference in the water tank is less than or equal to the preset temperature difference value, and then the combined heat and power unit is controlled to switch from the first heating operation mode to the energy-saving operation mode.

5. The energy-saving operation control method according to claim 4, characterized in that, The energy-saving operation control method also includes: Obtain the heating duration for heat storage compensation of the water tank based on the first heating operation mode; If the heating time reaches the preset time and the water temperature difference in the water tank is greater than the preset temperature difference, the combined heat and power unit will be switched from the first heating operation mode to the second heating operation mode; wherein the heating power of the second heating operation mode is greater than the heating power when switching from the first heating operation mode.

6. An energy-saving operation control device, characterized in that, include: The first acquisition module is used to acquire the first power consumption and first water flow of the combined heat and power unit at the first time, as well as the first inlet and outlet water temperature difference of the combined heat and power unit at the first time. The second acquisition module is used to acquire the second power consumption and second water flow of the combined heat and power unit at the second time, as well as the second inlet and outlet water temperature difference of the combined heat and power unit at the second time. The third acquisition module is used to acquire the heat storage capacity of the water tank connected to the combined heat and power unit at the second time. An energy-saving operation control module is used to determine the cumulative power consumption of the combined heat and power unit based on the first power consumption and the second power consumption; determine the first heating capacity of the combined heat and power unit at the first time based on the first inlet and outlet water temperature difference and the first water flow rate; determine the second heating capacity of the combined heat and power unit at the second time based on the second inlet and outlet water temperature difference and the second water flow rate; determine the cumulative heating capacity of the combined heat and power unit based on the first heating capacity and the second heating capacity; and obtain the operating mode of the combined heat and power unit. Based on the operating mode, the cumulative power consumption, and the cumulative heat output, the heat storage compensation amount of the combined heat and power unit for the water tank is determined; the heat storage capacity of the water tank is compensated based on the heat storage compensation amount to obtain the original total heat storage capacity of the water tank after compensation; the original total heat storage capacity of the water tank is corrected at preset intervals until the final corrected total heat storage capacity of the water tank reaches the preset total heat storage capacity, and the combined heat and power unit is controlled to enter the energy-saving operation mode.

7. An electronic device, characterized in that, It includes a processor and a memory, the memory storing multiple computer programs; the processor loads the computer programs from the memory to execute the energy-saving operation control method as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores multiple computer programs adapted for loading by a processor to execute the energy-saving operation control method as described in any one of claims 1 to 5.

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