Energy saving rate calculation method and system, control device and readable storage medium

Abstract

The invention discloses an energy-saving rate calculation method and system, a control device and a readable storage medium. The method comprises the steps of obtaining a target environment temperature point, a target load point, a pre-stored first compensation mapping relation and a pre-stored second compensation mapping relation at a target set temperature; according to the target environment temperature point, the target load point and the first compensation mapping relation, a first target average fan power value of a single online fan unit time corresponding to the energy-saving system of the central air conditioning system in the closed state is determined; according to the target environment temperature point, the target load point and a second compensation mapping relation, a second target average fan power value of a single online fan unit time corresponding to the energy-saving system of the central air conditioning system in the starting state is determined; and calculating according to the first target average fan power value and the second target average fan power value to obtain a target energy-saving rate. The evaluation accuracy of the energy saving rate can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field related to air conditioning, and in particular to an energy saving rate calculation method, system, control device and readable storage medium. Background Art

[0002] With the increasing prominence of energy issues and the continuous enhancement of environmental awareness, the energy-saving transformation and performance evaluation of central air-conditioning systems have become particularly important. However, traditional energy-saving rate evaluation methods are often affected by multiple factors such as the host set temperature, ambient temperature and load, resulting in inaccurate evaluation results. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an energy saving rate calculation method, which can improve the accuracy of energy saving rate evaluation.

[0004] The present invention also provides an energy saving rate calculation system, a control device for executing the energy saving rate calculation method, and a computer-readable storage medium.

[0005] The energy saving rate calculation method according to the first aspect of the present invention is applied to a central air conditioning system, and the method includes: Obtaining a target ambient temperature point, a target load point, a pre-stored first compensation mapping relationship and a second compensation mapping relationship at a target set temperature; wherein the target set temperature is the outlet water temperature or the inlet water temperature of the central air-conditioning system, the first compensation mapping relationship represents a first power compensation parameter corresponding to ambient temperature changes at different load points within a target ambient temperature range when the energy-saving system of the central air-conditioning system is in a closed state, and the second compensation mapping relationship represents a second power compensation parameter corresponding to ambient temperature changes at different load points within the target ambient temperature range when the energy-saving system of the central air-conditioning system is in an open state; Determine, according to the target ambient temperature point, the target load point and the first compensation mapping relationship, a first target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system in a closed state; Determine, according to the target ambient temperature point, the target load point and the second compensation mapping relationship, a second target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system when it is turned on; The target energy saving rate is calculated according to the first target average fan power value and the second target average fan power value.

[0006] The energy saving rate calculation method according to the embodiment of the present invention has at least the following beneficial effects: When the outlet water temperature or the inlet water temperature of the central air-conditioning system is set to the target set temperature, power compensation can be provided for different load points when the ambient temperature changes through the pre-stored first compensation mapping relationship and the second compensation mapping relationship, so that the first target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system in the off state can be determined according to the target ambient temperature point, the target load point and the first compensation mapping relationship, and the second target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system in the on state can be determined according to the target ambient temperature point, the target load point and the second compensation mapping relationship, and then the target energy saving rate is calculated according to the first target average fan power value and the second target average fan power value, which comprehensively takes into account the influence of various factors such as the host set temperature, ambient temperature and load, thereby improving the accuracy of the energy saving rate assessment.

[0007] According to some embodiments of the present invention, the first power compensation parameter is obtained by the following steps: At the target set temperature, turning off the energy-saving system of the central air-conditioning system, and obtaining a plurality of first average fan powers per unit time of a single online fan corresponding to a plurality of ambient temperature points and a plurality of different load points within the target ambient temperature range; Determine each of the first average fan powers corresponding to each load point at a reference ambient temperature point as a corresponding first average fan power reference value, wherein the reference ambient temperature point is one of the two boundary values ​​of the target ambient temperature interval, and the reference ambient temperature point represents a preset lower temperature threshold for turning on cooling of the central air-conditioning system, or represents a preset upper temperature threshold for turning on heating of the central air-conditioning system; Determine, based on the plurality of the first average fan powers, a first average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to the plurality of different load points changes by a preset temperature within the target ambient temperature range; The first average wind turbine power reference values ​​corresponding to different load points at the reference ambient temperature point and the first average change values ​​corresponding to different load points are recorded as the first power compensation parameter.

[0008] According to some embodiments of the present invention, the step of obtaining a plurality of first average fan powers per unit time of a single online fan corresponding one-to-one to a plurality of ambient temperature points and a plurality of different load points within the target ambient temperature range includes: Obtaining a plurality of first system total powers per unit time corresponding one-to-one to a plurality of ambient temperature points and a plurality of different load points within the target ambient temperature range, and a total number of terminal fans of the central air-conditioning system; Determine the number of first online fans corresponding to multiple ambient temperature points and multiple different load points within the target ambient temperature range according to the total number of terminal fans; Based on multiple first system total powers and multiple first online fan numbers, multiple first average fan powers per unit time of a single online fan corresponding one-to-one to multiple ambient temperature points and multiple different load points within the target ambient temperature range are calculated one-to-one.

[0009] According to some embodiments of the present invention, the second power compensation parameter is obtained by the following steps: At the target set temperature, turning on the energy-saving system of the central air-conditioning system, and obtaining a plurality of second average fan powers per unit time of a single online fan corresponding to a plurality of ambient temperature points and a plurality of different load points within the target ambient temperature range; Determine each of the second average fan powers corresponding to each load point at a reference ambient temperature point as a corresponding second average fan power reference value, wherein the reference ambient temperature point is one of the two boundary values ​​of the target ambient temperature interval, and the reference ambient temperature point represents a preset lower temperature threshold for turning on cooling of the central air-conditioning system, or represents a preset upper temperature threshold for turning on heating of the central air-conditioning system; Determine, based on the plurality of the second average fan powers, a second average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to the plurality of different load points changes by a preset temperature within the target ambient temperature range; The second average wind turbine power reference values ​​corresponding to different load points at the reference ambient temperature point and the second average change values ​​corresponding to different load points are recorded as the second power compensation parameters.

[0010] According to some embodiments of the present invention, the step of obtaining a plurality of second average fan powers per unit time of a single online fan corresponding one-to-one to a plurality of ambient temperature points and a plurality of different load points within the target ambient temperature range includes: Obtaining a plurality of second system total powers per unit time corresponding one-to-one to a plurality of ambient temperature points and a plurality of different load points within the target ambient temperature range, and a total number of terminal fans of the central air-conditioning system; Determine the number of second online fans corresponding to multiple ambient temperature points and multiple different load points within the target ambient temperature range according to the total number of terminal fans; According to the total powers of the multiple second systems and the multiple numbers of the second online fans, multiple second average fan powers per unit time of a single online fan corresponding one-to-one to multiple ambient temperature points and multiple different load points within the target ambient temperature range are calculated one-to-one.

[0011] According to some embodiments of the present invention, the first power compensation parameter includes each first average fan power reference value corresponding to different load points at the reference ambient temperature point, and a first average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to different load points changes by a preset temperature within the target ambient temperature range, wherein the reference ambient temperature point is one of the two boundary values ​​of the target ambient temperature range, and the reference ambient temperature point represents a preset lower temperature threshold for turning on cooling of the central air-conditioning system, or represents a preset upper temperature threshold for turning on heating of the central air-conditioning system; The constraint formula of the first target average wind turbine power value is: + ; in, represents the first target average wind turbine power value, represents the target ambient temperature point, represents the reference ambient temperature point, represents the first average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to the target load point changes by a preset temperature within the target ambient temperature range, The first average wind turbine power reference value represents the first average wind turbine power reference value of the reference ambient temperature point corresponding to the target load point.

[0012] According to some embodiments of the present invention, the second power compensation parameter includes each second average fan power reference value corresponding to different load points at the reference ambient temperature point, and a second average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to different load points changes by a preset temperature within the target ambient temperature range, wherein the reference ambient temperature point is one of the two boundary values ​​of the target ambient temperature range, and the reference ambient temperature point represents a preset lower temperature threshold for turning on cooling of the central air-conditioning system, or represents a preset upper temperature threshold for turning on heating of the central air-conditioning system; The constraint formula of the second target average wind turbine power value is: '+ ; in, represents the second target average wind turbine power value, represents the target ambient temperature point, represents the reference ambient temperature point, The second average change value represents the average fan power per unit time of a single online fan when the ambient temperature corresponding to the target load point changes by a preset temperature within the target ambient temperature range, The second average wind turbine power reference value represents the second average wind turbine power reference value of the reference ambient temperature point corresponding to the target load point.

[0013] The energy saving rate calculation system according to the second aspect of the present invention is applied to a central air conditioning system, and the system includes: A data acquisition unit, used to acquire a target ambient temperature point, a target load point, a pre-stored first compensation mapping relationship and a second compensation mapping relationship at a target set temperature; wherein the target set temperature is the outlet water temperature or the inlet water temperature of the central air-conditioning system, the first compensation mapping relationship represents a first power compensation parameter corresponding to ambient temperature changes at different load points within a target ambient temperature range when the energy-saving system of the central air-conditioning system is in a closed state, and the second compensation mapping relationship represents a second power compensation parameter corresponding to ambient temperature changes at different load points within the target ambient temperature range when the energy-saving system of the central air-conditioning system is in an open state; A first calculation unit is used to determine a first target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system in a closed state according to the target ambient temperature point, the target load point and the first compensation mapping relationship; A second calculation unit is used to determine a second target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system when the energy-saving system is turned on according to the target ambient temperature point, the target load point and the second compensation mapping relationship; The energy saving rate calculation unit is used to calculate a target energy saving rate according to the first target average fan power value and the second target average fan power value.

[0014] The energy saving rate calculation system according to the embodiment of the present invention has at least the following beneficial effects: When the outlet water temperature or the inlet water temperature of the central air-conditioning system is set to the target set temperature, power compensation can be provided for different load points when the ambient temperature changes through the pre-stored first compensation mapping relationship and the second compensation mapping relationship, so that the first target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system in the off state can be determined according to the target ambient temperature point, the target load point and the first compensation mapping relationship, and the second target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system in the on state can be determined according to the target ambient temperature point, the target load point and the second compensation mapping relationship, and then the target energy saving rate is calculated according to the first target average fan power value and the second target average fan power value, which comprehensively takes into account the influence of various factors such as the host set temperature, ambient temperature and load, thereby improving the accuracy of the energy saving rate assessment.

[0015] According to the third aspect of the present invention, the control device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the energy saving rate calculation method as described in the first aspect of the embodiment above when executing the computer program. Since the control device adopts all the technical solutions of the energy saving rate calculation method of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment.

[0016] According to the computer-readable storage medium of the fourth aspect embodiment of the present invention, computer-executable instructions are stored, and the computer-executable instructions are used to execute the energy saving rate calculation method as described in the first aspect embodiment. Since the computer-readable storage medium adopts all the technical solutions of the energy saving rate calculation method of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment.

[0017] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 It is a flow chart of a method for calculating energy saving rate according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] In the description of the present invention, if there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0021] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0023] The following will be combined Figure 1 The energy saving rate calculation method of the embodiment of the present invention is described clearly and completely. Obviously, the embodiment described below is only a part of the embodiments of the present invention, not all the embodiments.

[0024] refer to Figure 1 , Figure 1 It is a flow chart of a method for calculating energy saving rate according to an embodiment of the present invention.

[0025] The energy saving rate calculation method according to the first aspect of the present invention is applied to a central air conditioning system, and the method includes: Obtaining a target ambient temperature point, a target load point, a pre-stored first compensation mapping relationship and a second compensation mapping relationship under a target set temperature; wherein the target set temperature is a water outlet temperature or a water inlet temperature of a central air-conditioning system, the first compensation mapping relationship indicates a first power compensation parameter corresponding to ambient temperature changes at different load points within a target ambient temperature range when the energy-saving system of the central air-conditioning system is in a closed state, and the second compensation mapping relationship indicates a second power compensation parameter corresponding to ambient temperature changes at different load points within a target ambient temperature range when the energy-saving system of the central air-conditioning system is in an open state; Determine, according to the target ambient temperature point, the target load point and the first compensation mapping relationship, a first target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system in the off state; Determine, according to the target ambient temperature point, the target load point and the second compensation mapping relationship, a second target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system when it is turned on; The target energy saving rate is calculated according to the first target average fan power value and the second target average fan power value.

[0026] In some embodiments of the present invention, the first power compensation parameter is obtained by the following steps: At the target set temperature, the energy-saving system of the central air-conditioning system is turned off, and multiple first average fan powers per unit time of a single online fan corresponding to multiple ambient temperature points and multiple different load points within the target ambient temperature range are obtained; Determine each first average fan power corresponding to each load point at the reference ambient temperature point as the corresponding first average fan power reference value, wherein the reference ambient temperature point is one of the two boundary values ​​of the target ambient temperature interval, and the reference ambient temperature point represents a preset lower temperature threshold for turning on cooling of the central air-conditioning system, or represents a preset upper temperature threshold for turning on heating of the central air-conditioning system; Determine, based on the plurality of first average fan powers, a first average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to the plurality of different load points changes by a preset temperature within the target ambient temperature range; The first average fan power reference values ​​corresponding to the reference ambient temperature point at different load points and the first average change values ​​corresponding to the different load points are recorded as first power compensation parameters.

[0027] In some embodiments of the present invention, obtaining a plurality of first average fan powers per unit time of a single online fan corresponding one-to-one to a plurality of ambient temperature points and a plurality of different load points within a target ambient temperature range includes: Obtaining the total power of multiple first systems per unit time corresponding to multiple ambient temperature points and multiple different load points within the target ambient temperature range, and the total number of terminal fans of the central air-conditioning system; Determine the number of first online fans corresponding to multiple ambient temperature points and multiple different load points within the target ambient temperature range according to the total number of terminal fans; According to multiple first system total powers and multiple first online fan numbers, multiple first average fan powers per unit time of a single online fan corresponding one-to-one to multiple ambient temperature points and multiple different load points within the target ambient temperature range are calculated one-to-one.

[0028] Taking summer as an example, the outlet water temperature or inlet water temperature of the central air-conditioning system is set as the target set temperature, and the target ambient temperature range is 25℃~35℃, among which 25℃ is the reference ambient temperature point, that is, the preset lower temperature threshold for the central air-conditioning system to turn on cooling.

[0029] Turn off the energy-saving system of the central air-conditioning system, collect data from any five ambient temperature points in the range of 25℃~35℃ (such as 25℃, 28℃, 30℃, 33℃, and 35℃), and the load point takes a step value of 10%. From 20% load to 100% load, there are a total of 9 load points with the first system total power per unit time (20% load ±5% deviation takes 20%, similarly 30% load ±5% deviation takes 30%, and so on 90% load ±5% deviation takes 90%), that is, 9 values ​​of the first system total power per unit time for 9 load points at 25℃, 9 values ​​of the first system total power per unit time for 9 load points at 28℃; 9 values ​​of the first system total power per unit time for 9 load points at 30℃; 9 values ​​of the first system total power per unit time for 9 load points at 33℃; 9 values ​​of the first system total power per unit time for 9 load points at 35℃.

[0030] Assuming the total number of terminal fans in the central air conditioning system is N, the number of first online fans n = N * load rate. Dividing the total power of the first system by the number of first online fans can obtain the first average fan power per unit time of the corresponding single online fan.

[0031] The first average fan powers corresponding to the load points at 25° C. are the corresponding first average fan power reference values.

[0032] Calculate the first change value of the average fan power per unit time of a single online fan when the temperature changes by 1°C at 25°C~28°C and 20% load, that is: P 1 =( - ) / 3. Similarly, find the first change value of the average fan power per unit time of a single online fan when the temperature changes by 1°C in the range of 28°C~30°C, 30°C~33°C, and 33°C~35°C at 20% load. P 2. P 3 and P 4. Take the average value 1=( P1+ P2+ P3+ P4) / 4, as the first average change value of the average fan power per unit time of a single online fan for every 1°C change in temperature in the range of 25°C to 35°C at 20% load. Similarly, the average value of 30% load to 100% load can be calculated 2~ 9, as the first average change value of the average fan power per unit time of a single online fan corresponding to 30% load ~ 100% load in the range of 25℃ ~ 35℃.

[0033] In some embodiments, with the load rate as the horizontal axis and the first average fan power per unit time of a single online fan as the vertical axis, five average fan power-load rate curves at 25°C, 28°C, 30°C, 33°C, and 35°C are drawn and fitted, so that the relationship between temperature, average fan power and load rate when the energy-saving system is in the off state can be intuitively seen.

[0034] In some embodiments, the first compensation mapping relationship can be in the form of a table. For example, the columns of the table represent different load points, and the rows of the table represent the first average fan power reference values ​​corresponding to the reference ambient temperature points and different load points. The first average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to the different load points changes by a preset temperature within the target ambient temperature range.

[0035] The embodiment of the present invention can extract the table when needed, and intuitively see the first power compensation parameter corresponding to the ambient temperature change of different load points within the target ambient temperature range when the energy-saving system of the central air-conditioning system is turned off. Pre-storing the first compensation mapping relationship can reduce the calculation amount of the energy-saving rate and improve the calculation efficiency.

[0036] It should be noted that the first compensation mapping relationship may also be stored in the form of other mapping relationships, which should not be regarded as a limitation to the present invention.

[0037] In some embodiments of the present invention, the constraint formula of the first target average wind turbine power value is: + ; in, represents the first target average wind turbine power value, Indicates the target ambient temperature point, Indicates the reference ambient temperature point, It represents the first average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to the target load point changes by a preset temperature within the target ambient temperature range. Indicates the first average fan power reference value of the reference ambient temperature point corresponding to the target load point.

[0038] In some embodiments, at T1 degrees Celsius and a load of 20%, the first target average wind turbine power value is: 1 + The first target average fan power value at T2 degrees Celsius and load 30% is: 2 + .

[0039] In some embodiments of the present invention, the second power compensation parameter is obtained by the following steps: At the target set temperature, the energy-saving system of the central air-conditioning system is turned on to obtain multiple second average fan powers per unit time of a single online fan corresponding to multiple ambient temperature points and multiple different load points within the target ambient temperature range; Determine each second average fan power of each load point corresponding to the reference ambient temperature point as the corresponding second average fan power reference value, wherein the reference ambient temperature point is one of the two boundary values ​​of the target ambient temperature interval, and the reference ambient temperature point represents a preset lower temperature threshold for turning on cooling of the central air-conditioning system, or represents a preset upper temperature threshold for turning on heating of the central air-conditioning system; Determine, based on the plurality of second average fan powers, a second average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to the plurality of different load points changes by a preset temperature within the target ambient temperature range; The second average wind turbine power reference values ​​corresponding to the reference ambient temperature point at different load points and the second average change values ​​corresponding to the different load points are recorded as second power compensation parameters.

[0040] In some embodiments of the present invention, obtaining a plurality of second average fan powers per unit time of a single online fan corresponding one-to-one to a plurality of ambient temperature points and a plurality of different load points within a target ambient temperature range includes: Obtaining the total power of multiple second systems per unit time corresponding to multiple ambient temperature points and multiple different load points within the target ambient temperature range, as well as the total number of terminal fans of the central air-conditioning system; Determine the number of second online fans corresponding to multiple ambient temperature points and multiple different load points within the target ambient temperature range according to the total number of terminal fans; According to the second system total powers and the second numbers of online fans, multiple second average fan powers per unit time of a single online fan corresponding to multiple ambient temperature points and multiple different load points within the target ambient temperature range are calculated one by one.

[0041] Turn on the energy-saving system of the central air-conditioning system, collect data from any five ambient temperature points in the range of 25°C to 35°C (such as 25°C, 28°C, 30°C, 33°C, and 35°C), and collect data from 9 load points from 20% load to 100% load with a step value of 10%. (20% load ±5% deviation takes 20%, similarly 30% load ±5% deviation takes 30%, and so on 90% load ±5% deviation takes 90%), that is, 9 values ​​of the total power of the second system per unit time for 9 load points at 25°C, 9 values ​​of the total power of the second system per unit time for 9 load points at 28°C; 9 values ​​of the total power of the second system per unit time for 9 load points at 30°C; 9 values ​​of the total power of the second system per unit time for 9 load points at 33°C; and 9 values ​​of the total power of the second system per unit time for 9 load points at 35°C.

[0042] Assuming the total number of terminal fans in the central air conditioning system is N, the number of first online fans n = N * load rate. Dividing the second system total power by the second number of online fans can obtain the second average fan power per unit time of the corresponding single online fan.

[0043] The second average fan powers corresponding to the load points at 25° C. are the corresponding second average fan power reference values.

[0044] Calculate the second change value of the average fan power per unit time of a single online fan when the temperature changes by 1°C at 25°C~28°C and 20% load, that is: P 1 =( - ) / 3. Similarly, calculate the second change value of the average fan power per unit time of a single online fan when the temperature changes by 1°C in the range of 28°C~30°C, 30°C~33°C, and 33°C~35°C at 20% load. P 2. P 3 and P 4. Take the average value 1=( P 1+ P 2+ P 3+ P 4) / 4, as the second average change value of the average fan power per unit time of a single online fan for every 1°C change in temperature in the range of 25°C to 35°C at 20% load. Similarly, the average value of 30% load to 100% load can be calculated. 2~ 9, as the second average change value of the average fan power per unit time of a single online fan corresponding to 30% load ~ 100% load in the range of 25℃ ~ 35℃.

[0045] In some embodiments, with the load rate as the horizontal axis and the second average fan power per unit time of a single online fan as the vertical axis, five average fan power-load rate curves at 25°C, 28°C, 30°C, 33°C, and 35°C are drawn and fitted, so that the relationship between temperature, average fan power, and load rate can be intuitively seen when the energy-saving system is on.

[0046] In some embodiments, the second compensation mapping relationship can be in the form of a table. For example, the columns of the table represent different load points, and the rows of the table represent the second average fan power reference values ​​corresponding to the reference ambient temperature points and different load points. The second average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to the different load points changes by a preset temperature within the target ambient temperature range.

[0047] The embodiment of the present invention can extract the table when needed, and intuitively see the second power compensation parameters corresponding to the ambient temperature changes of different load points within the target ambient temperature range when the energy-saving system of the central air-conditioning system is turned off. Pre-storing the second compensation mapping relationship can reduce the calculation amount of the energy-saving rate and improve the calculation efficiency.

[0048] It should be noted that the second compensation mapping relationship may also be stored in other mapping relationships, which should not be regarded as a limitation to the present invention.

[0049] In some embodiments of the present invention, the constraint formula of the second target average wind turbine power value is: '+ ; in, represents the second target average wind turbine power value, Indicates the target ambient temperature point, Indicates the reference ambient temperature point, It represents the second average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to the target load point changes by a preset temperature within the target ambient temperature range. Indicates the second average fan power reference value of the reference ambient temperature point corresponding to the target load point.

[0050] In some embodiments, at T1 degrees Celsius and a load of 20%, the second target average wind turbine power value is: 1 + The second target average fan power value at T2 degrees Celsius and load 30% is: 2 + .

[0051] In a specific embodiment, when the energy-saving system is turned on and recorded in the second compensation mapping relationship, at 25°C and 30% load, the corresponding second average fan power reference value is 2KW. When the load is 30%, the second average change value of the average fan power per unit time of a single online fan is 0.2KW for every 1°C change in ambient temperature between 25°C and 35°C. The current target ambient temperature point is 28°C, the target load point is 30%, and the second target average fan power value is 0.2KW + = 2.6KW.

[0052] At the target ambient temperature point and target load point, the constraint formula for the target energy saving rate is: ,in, It represents the first target average fan power value per unit time of a single online fan in the off state of the energy-saving system. Indicates the second target average fan power value per unit time of a single online fan when the energy-saving system is turned on.

[0053] For central air conditioning systems in winter, the target ambient temperature range can be 0℃~10℃, where 10℃ is the reference ambient temperature point, that is, the preset upper temperature threshold for the central air conditioning system to turn on heating. The overall specific calculation steps are the same as in summer and will not be repeated here. In addition, for the outlet water temperature or inlet water temperature of the same central air conditioning system, there is only one set of corresponding first compensation mapping relationship and second compensation mapping relationship. If the outlet water temperature or inlet water temperature of the central air conditioning system is changed, it is necessary to retest and determine the corresponding first compensation mapping relationship and second compensation mapping relationship.

[0054] It should be noted that the first target average fan power value and the second target average fan power value of the embodiment of the present invention are both average fan power values ​​per unit time of a single online fan that amortizes the energy consumption of the entire central air-conditioning system, and therefore can represent the energy consumption of the entire central air-conditioning system. For example, under the condition that the energy-saving system is shut down for m days, the cumulative value of the fan running time at 28°C and 30% load is counted. For example, if 30 fans run for a total of 1500 minutes and the total system power is Ek, then the average fan power value per unit time of a single online fan is: Ek / 1500.

[0055] In addition, it should be noted that all the specific values ​​mentioned above can be changed according to actual conditions and cannot be regarded as limitations of the present invention.

[0056] The energy saving rate calculation method of the embodiment of the present invention can accurately evaluate the relationship between the energy saving rate and the ambient temperature and load under different host water outlet temperature or water inlet temperature settings, can timely understand the operating status and energy saving effect of the central air-conditioning system through real-time data collection and intelligent analysis, and can also support continuous optimization and adjustment to adapt to changing environmental conditions and user needs. The target energy saving rate calculated by the embodiment of the present invention is a real-time changing value with higher accuracy.

[0057] According to the energy saving rate calculation method of the embodiment of the present invention, when the outlet water temperature or the inlet water temperature of the central air-conditioning system is set to the target set temperature, power compensation can be provided for different load points when the ambient temperature changes through the pre-stored first compensation mapping relationship and the second compensation mapping relationship, so that the first target average fan power value per unit time of a single online fan corresponding to the energy saving system of the central air-conditioning system in the off state can be determined according to the target ambient temperature point, the target load point and the first compensation mapping relationship, and the second target average fan power value per unit time of a single online fan corresponding to the energy saving system of the central air-conditioning system in the on state can be determined according to the target ambient temperature point, the target load point and the second compensation mapping relationship, and then the target energy saving rate is calculated according to the first target average fan power value and the second target average fan power value, which comprehensively considers the influence of multiple factors such as the host set temperature, ambient temperature and load, thereby improving the accuracy of energy saving rate assessment.

[0058] The energy saving rate calculation system according to the second embodiment of the present invention is applied to a central air conditioning system, and the system includes a data acquisition unit, a first calculation unit, a second calculation unit and an energy saving rate calculation unit.

[0059] A data acquisition unit, used to acquire a target ambient temperature point, a target load point, a pre-stored first compensation mapping relationship and a second compensation mapping relationship under a target set temperature; wherein the target set temperature is a water outlet temperature or a water inlet temperature of a central air-conditioning system, the first compensation mapping relationship indicates a first power compensation parameter corresponding to ambient temperature changes at different load points within a target ambient temperature range when an energy-saving system of the central air-conditioning system is in a closed state, and the second compensation mapping relationship indicates a second power compensation parameter corresponding to ambient temperature changes at different load points within a target ambient temperature range when the energy-saving system of the central air-conditioning system is in an open state; A first calculation unit is used to determine a first target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system in a closed state according to the target ambient temperature point, the target load point and the first compensation mapping relationship; A second calculation unit is used to determine a second target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system when the energy-saving system is turned on according to the target ambient temperature point, the target load point and the second compensation mapping relationship; The energy saving rate calculation unit is used to calculate the target energy saving rate according to the first target average fan power value and the second target average fan power value.

[0060] According to the energy saving rate calculation system of the embodiment of the present invention, when the outlet water temperature or the inlet water temperature of the central air-conditioning system is set to the target set temperature, power compensation can be provided for different load points when the ambient temperature changes through the pre-stored first compensation mapping relationship and the second compensation mapping relationship, so that the first target average fan power value per unit time of a single online fan corresponding to the energy saving system of the central air-conditioning system in the off state can be determined according to the target ambient temperature point, the target load point and the first compensation mapping relationship, and the second target average fan power value per unit time of a single online fan corresponding to the energy saving system of the central air-conditioning system in the on state can be determined according to the target ambient temperature point, the target load point and the second compensation mapping relationship, and then the target energy saving rate is calculated according to the first target average fan power value and the second target average fan power value, which comprehensively considers the influence of multiple factors such as the host set temperature, ambient temperature and load, thereby improving the accuracy of energy saving rate assessment.

[0061] Since the energy saving rate calculation system adopts all the technical solutions of the energy saving rate calculation method of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be described in detail here.

[0062] In addition, an embodiment of the present invention further provides a control device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor and the memory may be connected via a bus or other means.

[0063] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0064] The non-transient software program and instructions required to implement the energy saving rate calculation method of the above embodiment are stored in the memory, and when executed by the processor, the energy saving rate calculation method of the above embodiment is executed.

[0065] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0066] In addition, an embodiment of the present invention also provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are executed by a processor or controller, for example, by the processor of the above embodiment, so that the above processor can execute the energy saving rate calculation method in the above embodiment.

[0067] It will be appreciated by those skilled in the art that all or some of the steps and systems in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or transient medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0068] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A method for calculating energy saving rate, applied to a central air conditioning system, characterized in that: The method comprises: Obtaining a target ambient temperature point, a target load point, a pre-stored first compensation mapping relationship and a second compensation mapping relationship at a target set temperature; wherein the target set temperature is the outlet water temperature or the inlet water temperature of the central air-conditioning system, the first compensation mapping relationship represents a first power compensation parameter corresponding to ambient temperature changes at different load points within a target ambient temperature range when the energy-saving system of the central air-conditioning system is in a closed state, and the second compensation mapping relationship represents a second power compensation parameter corresponding to ambient temperature changes at different load points within the target ambient temperature range when the energy-saving system of the central air-conditioning system is in an open state; Determine, according to the target ambient temperature point, the target load point and the first compensation mapping relationship, a first target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system in a closed state; Determine, according to the target ambient temperature point, the target load point and the second compensation mapping relationship, a second target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system when it is turned on; The target energy saving rate is calculated according to the first target average fan power value and the second target average fan power value.

2. The energy saving rate calculation method according to claim 1, characterized in that: The first power compensation parameter is obtained by the following steps: At the target set temperature, turning off the energy-saving system of the central air-conditioning system, and obtaining a plurality of first average fan powers per unit time of a single online fan corresponding to a plurality of ambient temperature points and a plurality of different load points within the target ambient temperature range; Determine each of the first average fan powers corresponding to each load point at a reference ambient temperature point as a corresponding first average fan power reference value, wherein the reference ambient temperature point is one of the two boundary values ​​of the target ambient temperature interval, and the reference ambient temperature point represents a preset lower temperature threshold for turning on cooling of the central air-conditioning system, or represents a preset upper temperature threshold for turning on heating of the central air-conditioning system; Determine, based on the plurality of the first average fan powers, a first average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to the plurality of different load points changes by a preset temperature within the target ambient temperature range; The first average wind turbine power reference values ​​corresponding to different load points at the reference ambient temperature point and the first average change values ​​corresponding to different load points are recorded as the first power compensation parameter.

3. The energy saving rate calculation method according to claim 2, characterized in that: The step of obtaining a plurality of first average fan powers per unit time of a single online fan corresponding one-to-one to a plurality of ambient temperature points and a plurality of different load points within the target ambient temperature interval comprises: Obtaining a plurality of first system total powers per unit time corresponding one-to-one to a plurality of ambient temperature points and a plurality of different load points within the target ambient temperature range, and a total number of terminal fans of the central air-conditioning system; Determine the number of first online fans corresponding to multiple ambient temperature points and multiple different load points within the target ambient temperature range according to the total number of terminal fans; Based on multiple first system total powers and multiple first online fan numbers, multiple first average fan powers per unit time of a single online fan corresponding one-to-one to multiple ambient temperature points and multiple different load points within the target ambient temperature range are calculated one-to-one.

4. The energy saving rate calculation method according to claim 1, characterized in that: The second power compensation parameter is obtained by the following steps: At the target set temperature, turning on the energy-saving system of the central air-conditioning system, and obtaining a plurality of second average fan powers per unit time of a single online fan corresponding to a plurality of ambient temperature points and a plurality of different load points within the target ambient temperature range; Determine each of the second average fan powers corresponding to each load point at a reference ambient temperature point as a corresponding second average fan power reference value, wherein the reference ambient temperature point is one of the two boundary values ​​of the target ambient temperature interval, and the reference ambient temperature point represents a preset lower temperature threshold for turning on cooling of the central air-conditioning system, or represents a preset upper temperature threshold for turning on heating of the central air-conditioning system; Determine, based on the plurality of the second average fan powers, a second average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to the plurality of different load points changes by a preset temperature within the target ambient temperature range; The second average wind turbine power reference values ​​corresponding to different load points at the reference ambient temperature point and the second average change values ​​corresponding to different load points are recorded as the second power compensation parameters.

5. The energy saving rate calculation method according to claim 4, characterized in that: The step of obtaining a plurality of second average fan powers per unit time of a single online fan corresponding one-to-one to a plurality of ambient temperature points and a plurality of different load points within the target ambient temperature interval comprises: Obtaining a plurality of second system total powers per unit time corresponding one-to-one to a plurality of ambient temperature points and a plurality of different load points within the target ambient temperature range, and a total number of terminal fans of the central air-conditioning system; Determine the number of second online fans corresponding to multiple ambient temperature points and multiple different load points within the target ambient temperature range according to the total number of terminal fans; According to the total powers of the multiple second systems and the multiple numbers of the second online fans, multiple second average fan powers per unit time of a single online fan corresponding one-to-one to multiple ambient temperature points and multiple different load points within the target ambient temperature range are calculated one-to-one.

6. The energy saving rate calculation method according to claim 1, characterized in that: The first power compensation parameter includes each first average fan power reference value corresponding to different load points at the reference ambient temperature point, and a first average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to different load points changes by a preset temperature within the target ambient temperature range, wherein the reference ambient temperature point is one of the two boundary values ​​of the target ambient temperature range, and the reference ambient temperature point represents a preset lower temperature threshold for turning on cooling of the central air-conditioning system, or represents a preset upper temperature threshold for turning on heating of the central air-conditioning system; The constraint formula of the first target average wind turbine power value is: 1+ ； in, represents the first target average wind turbine power value, represents the target ambient temperature point, represents the reference ambient temperature point, 1 represents the first average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to the target load point changes by a preset temperature within the target ambient temperature range, The first average wind turbine power reference value represents the first average wind turbine power reference value of the reference ambient temperature point corresponding to the target load point.

7. The energy saving rate calculation method according to claim 1, characterized in that: The second power compensation parameter includes each second average fan power reference value corresponding to different load points at the reference ambient temperature point, and a second average change value of the average fan power per unit time of a single online fan when the ambient temperature corresponding to different load points changes by a preset temperature within the target ambient temperature range, wherein the reference ambient temperature point is one of the two boundary values ​​of the target ambient temperature range, and the reference ambient temperature point represents a preset lower temperature threshold for turning on cooling of the central air-conditioning system, or represents a preset upper temperature threshold for turning on heating of the central air-conditioning system; The constraint formula of the second target average wind turbine power value is: '1+ ； in, represents the second target average wind turbine power value, represents the target ambient temperature point, represents the reference ambient temperature point, 1 The second average change value represents the average fan power per unit time of a single online fan when the ambient temperature corresponding to the target load point changes by a preset temperature within the target ambient temperature range, The second average wind turbine power reference value represents the second average wind turbine power reference value of the reference ambient temperature point corresponding to the target load point.

8. An energy saving rate calculation system, applied to a central air conditioning system, characterized in that: The system comprises: A data acquisition unit, used to acquire a target ambient temperature point, a target load point, a pre-stored first compensation mapping relationship and a second compensation mapping relationship at a target set temperature; wherein the target set temperature is the outlet water temperature or the inlet water temperature of the central air-conditioning system, the first compensation mapping relationship represents a first power compensation parameter corresponding to ambient temperature changes at different load points within a target ambient temperature range when the energy-saving system of the central air-conditioning system is in a closed state, and the second compensation mapping relationship represents a second power compensation parameter corresponding to ambient temperature changes at different load points within the target ambient temperature range when the energy-saving system of the central air-conditioning system is in an open state; A first calculation unit is used to determine a first target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system in a closed state according to the target ambient temperature point, the target load point and the first compensation mapping relationship; A second calculation unit is used to determine a second target average fan power value per unit time of a single online fan corresponding to the energy-saving system of the central air-conditioning system when the energy-saving system is turned on according to the target ambient temperature point, the target load point and the second compensation mapping relationship; The energy saving rate calculation unit is used to calculate a target energy saving rate according to the first target average fan power value and the second target average fan power value.

9. A control device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the energy saving rate calculation method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium storing computer-executable instructions, characterized in that: The computer executable instructions are used to execute the energy saving rate calculation method according to any one of claims 1 to 7.

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