CN115560442A - Method and system for detecting energy-saving efficiency of central air conditioner and readable storage medium - Google Patents
Method and system for detecting energy-saving efficiency of central air conditioner and readable storage medium Download PDFInfo
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- CN115560442A CN115560442A CN202211172388.4A CN202211172388A CN115560442A CN 115560442 A CN115560442 A CN 115560442A CN 202211172388 A CN202211172388 A CN 202211172388A CN 115560442 A CN115560442 A CN 115560442A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The invention discloses a method and a system for detecting the energy-saving efficiency of a central air conditioner and a readable storage medium, wherein the method for detecting the energy-saving efficiency of the central air conditioner comprises the following steps: acquiring first total energy consumption of the central air-conditioning system within a first preset time span and second total energy consumption of the central air-conditioning system within a second preset time span; the energy-saving system is started within a first preset time length, and is stopped within a second preset time length, and the energy-saving system is used for reducing the operation energy consumption of the central air-conditioning system; calculating a first unit area energy efficiency according to the first total energy consumption; calculating a second energy efficiency per unit area according to the second total energy consumption; and determining the first energy-saving efficiency according to the first unit area energy efficiency and the second unit area energy efficiency. The invention can avoid the inaccurate energy efficiency detection caused by the change of the actually used room area due to the opening or the quitting of the room in the hotel, and can complete the calculation of the energy-saving efficiency only by utilizing the detection data in a very short time.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a method and a system for detecting energy-saving efficiency of a central air conditioner and a readable storage medium.
Background
At present, the energy consumption for building in China accounts for about 27% of the total social energy consumption. As society develops, this ratio gradually increases to over 30%. In the annual energy consumption of public buildings, the energy consumption of the central air conditioner accounts for nearly 60 percent. The carrying capacity of the general central air conditioner during installation and design is designed according to the most extreme weather and full load, and according to statistics, 95 percent of central air conditioners operate under 70 percent of load, and have larger energy waste.
In recent two years, the market of the tourism industry is low, the check-in rate of hotels in each big city is low, the check-in rate of most of the hotels is less than 70%, the central air conditioner operates in a full load state, great energy waste exists, and the demand of energy-saving reconstruction is urgent. Under such a large environment, many energy-saving central air-conditioning reconstruction manufacturers begin to perform energy-saving reconstruction on hotels in a cooperative mode of energy management contracts, and the electricity charges saved after reconstruction are divided. There is a pain point, just how to calculate the saved power? Most manufacturers compare energy consumption average values of hotels in the last three years, but the number of the hotels is different, the temperature and humidity settings in the rooms of the hotels are different, and the energy consumption data have larger deviation. Therefore, the traditional statistical mode is extremely inaccurate, which easily causes great misjudgment during evaluation of energy saving modification, and further influences the evaluation result of energy saving efficiency.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a system for detecting the energy-saving efficiency of a central air conditioner, which can improve the accuracy of the evaluation of the energy-saving efficiency of the central air conditioner.
The invention also provides a system for detecting the energy-saving efficiency of the central air conditioner and a computer readable storage medium for executing the method for detecting the energy-saving efficiency of the central air conditioner.
According to the energy-saving efficiency detection method of the central air conditioner in the embodiment of the first aspect of the invention, the energy-saving efficiency detection method of the central air conditioner comprises the following steps:
acquiring first total energy consumption of a central air-conditioning system within a first preset time span and second total energy consumption of the central air-conditioning system within a second preset time span; starting an energy-saving system within the first preset time length, stopping the energy-saving system within the second preset time length, wherein the energy-saving system is used for reducing the operation energy consumption of the central air-conditioning system;
calculating a first unit area energy efficiency according to the first total energy consumption;
calculating a second energy efficiency per unit area according to the second total energy consumption;
and determining first energy-saving efficiency according to the first unit area energy efficiency and the second unit area energy efficiency.
The method for detecting the energy-saving efficiency of the central air conditioner, provided by the embodiment of the invention, at least has the following beneficial effects:
the first unit area energy efficiency and the second unit area energy efficiency both represent the unit area energy efficiency, and therefore the problem that energy efficiency detection is inaccurate due to the fact that the actually used room area changes when a room is opened or quitted in a hotel can be avoided. Meanwhile, because the first unit area energy efficiency and the second unit area energy efficiency calculated by the method can be used for determining the energy-saving efficiency without long-time data statistics as in the conventional technical scheme, the method for detecting the energy-saving efficiency of the central air conditioner can be used for calculating the energy-saving efficiency only by using detection data in a very short time.
According to some embodiments of the invention, the calculating the first energy efficiency per unit area according to the first total energy consumption includes:
acquiring the opening time of each room within the first preset time length;
determining a first accumulated area according to the opening time of each room and the pre-acquired room area corresponding to each room;
and determining the first unit area energy efficiency according to the first total energy consumption and the first accumulated area.
According to some embodiments of the present invention, the determining a first cumulative area according to the opening time of each room and the pre-acquired room area corresponding to each room includes:
determining a plurality of first room opening durations by taking each room change as a time node within the first preset time length;
determining a corresponding first room opening area in each first room opening duration according to the room area corresponding to each room;
and determining the first accumulated area according to the plurality of first open-house time lengths and the plurality of first open-house areas.
According to some embodiments of the invention, the calculating the second energy efficiency per unit area according to the second total energy consumption comprises:
acquiring the opening time of each room within the second preset time length;
determining a second accumulated area according to the opening time of each room and the pre-acquired room area corresponding to each room;
and determining the second energy efficiency per unit area according to the second total energy consumption and the second accumulated area.
According to some embodiments of the present invention, the determining a second cumulative area according to the opening time of each room and the pre-acquired room area corresponding to each room includes:
determining a plurality of second room opening durations by taking each room change as a time node within the second preset time length;
determining a corresponding second room opening area in each second room opening duration according to the room area corresponding to each room;
and determining the second accumulated area according to the plurality of second open-house time lengths and the plurality of second open-house areas.
According to some embodiments of the present invention, the method for detecting energy saving efficiency of a central air conditioner further comprises the steps of:
obtaining a plurality of first total energy consumptions and a plurality of second total energy consumptions;
determining a plurality of first energy efficiencies per unit area according to the plurality of first total energy consumptions;
determining a plurality of second energy efficiencies per unit area based on the plurality of second total energy consumptions;
obtaining a plurality of first energy-saving efficiencies according to the plurality of first unit area energy efficiencies and the plurality of corresponding second unit area energy efficiencies;
and determining a plurality of second energy-saving efficiencies according to the plurality of first energy-saving efficiencies.
According to some embodiments of the invention, the obtaining a plurality of the first total energy consumptions and a plurality of the second total energy consumptions comprises:
and alternately acquiring a plurality of first total energy consumptions and a plurality of second total energy consumptions in a time domain sequence.
According to some embodiments of the invention, the determining a plurality of second energy saving efficiencies from a plurality of the first energy saving efficiencies comprises:
and removing the minimum value and the maximum value in the plurality of first energy-saving efficiencies, and carrying out average value calculation to obtain the second energy-saving efficiency.
According to some embodiments of the invention, the first preset length of time is identical to the second preset length of time.
The central air-conditioning energy-saving efficiency detection system according to the embodiment of the second aspect of the invention comprises:
the electric quantity acquisition module is used for acquiring the energy consumption of the central air-conditioning system;
the terminal devices are arranged in the rooms in a one-to-one correspondence mode and are all used for controlling the operation of the air conditioning device in the corresponding room and feeding back the use state of the room;
and the control center is respectively connected with the electric quantity acquisition module and the plurality of terminal devices and is used for executing the method for detecting the energy-saving efficiency of the central air conditioner.
The energy-saving efficiency detection system of the central air conditioner, provided by the embodiment of the invention, at least has the following beneficial effects:
the first unit area energy efficiency and the second unit area energy efficiency both represent the unit area energy efficiency, and therefore the problem that energy efficiency detection is inaccurate due to the fact that the actually used room area changes when a room is opened or quitted in a hotel can be avoided. Meanwhile, because the first unit area energy efficiency and the second unit area energy efficiency calculated by the method can be used for determining the energy-saving efficiency without long-time data statistics as in the conventional technical scheme, the energy-saving efficiency detection system of the central air conditioner can be used for calculating the energy-saving efficiency only by using detection data in a very short time.
According to some embodiments of the invention, the terminal device comprises:
the house card detection module is used for detecting the insertion state of the house card in a room;
the local controller is connected with the house card detection module;
the display control device is connected with the local controller;
and the communication module is connected with the local controller and used for carrying out data interaction with the control center.
According to the computer-readable storage medium of the third aspect embodiment of the present invention, there are stored computer-executable instructions for performing the central air-conditioning energy-saving efficiency detection method as described in the first aspect embodiment above. Since the computer-readable storage medium adopts all the technical solutions of the energy-saving efficiency detection method of the central air conditioner in the above embodiment, at least all the advantages brought by the technical solutions of the above embodiments are achieved.
Additional features and advantages of the 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 invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a method for detecting energy-saving efficiency of a central air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for detecting energy saving efficiency of a central air conditioner according to another embodiment of the present invention;
FIG. 3 is a system diagram of a system for detecting energy-saving efficiency of a central air conditioner according to an embodiment of the present invention;
fig. 4 is a system diagram of a terminal device according to another embodiment of the present invention.
Reference numerals:
the electric quantity acquisition module 100,
A control center 300.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, if there are first, second, etc. described, it is only for the purpose of distinguishing technical features, and it is not understood that relative importance is indicated or implied or that the number of indicated technical features is implicitly indicated or that the precedence of the indicated technical features is implicitly indicated.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to, for example, the upper, lower, etc., is indicated based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly defined, terms such as setup, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the detailed contents of the technical solutions.
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the embodiments described below are some, but not all embodiments of the present invention.
Referring to fig. 1, fig. 1 is a flowchart of a method for detecting energy-saving efficiency of a central air conditioner according to an embodiment of the present invention, where the method includes, but is not limited to, the following steps:
acquiring first total energy consumption of the central air-conditioning system within a first preset time span and second total energy consumption of the central air-conditioning system within a second preset time span; the energy-saving system is started within a first preset time span, and is stopped within a second preset time span, and the energy-saving system is used for reducing the running energy consumption of the central air-conditioning system;
calculating a first unit area energy efficiency according to the first total energy consumption;
calculating a second energy efficiency per unit area according to the second total energy consumption;
and determining the first energy-saving efficiency according to the first unit area energy efficiency and the second unit area energy efficiency.
In hotels, municipal buildings or commercial buildings, a central air conditioning system is mostly directly adopted for temperature regulation. When the energy consumption of the central air conditioning system needs to be detected, the electric quantity obtaining module 100, such as an electric meter, only needs to be directly installed from the electricity taking position on one side of the central air conditioner, and then measurement is performed. The total energy consumption read by the electric meter in the first preset time length is the first total energy consumption, and the total energy consumption read by the electric meter in the second preset time length is the second total energy consumption. It should be noted that the energy saving system of the central air conditioning system is turned on within the first preset time period to operate in the energy saving mode, and the energy saving system of the central air conditioning system is not turned on within the second preset time period to operate in the normal operation mode.
At this time, if the energy saving efficiency is calculated by directly using the first total energy consumption and the second total energy consumption, the calculation may be deviated because the number of rooms in which the air conditioners are specifically used and the sizes of the corresponding room areas within the first preset time period and the second preset time period cannot be determined. The energy-saving efficiency detection method of the central air conditioner in the embodiment of the invention adopts a mode of calculating the energy efficiency of unit area to effectively solve the problem. After the first total energy consumption is determined, the first energy efficiency per unit area may be calculated by using the first total energy consumption, the predetermined room areas and the number of the rooms opened within the first preset time length, and similarly, after the second total energy consumption is determined, the second energy efficiency per unit area may be calculated by using the second total energy consumption, the predetermined room areas and the number of the rooms opened within the second preset time length. And finally, calculating the first energy-saving efficiency by using the first unit area energy efficiency and the second unit area energy efficiency. It is to be understood that the energy saving efficiency calculation refers to a smaller ratio of energy consumption after the energy saving system is turned on relative to before it is turned on.
In some embodiments, in order to further reduce the test error, the first preset time length and the second preset time length are set to be consistent, for example, both are one hour, and when the energy saving mode is operated, the set temperatures of all rooms are uniformly modified to be a target temperature, and the set humidity of the room is modified to be a target humidity, for example, the most comfortable temperature and the most comfortable humidity of the human body. On the premise of the embodiment, the error caused by the calculation of the energy-saving efficiency can be reduced to a greater extent by calculating the energy-saving efficiency.
In the energy-saving efficiency detection method of the central air conditioner, the first unit area energy efficiency and the second unit area energy efficiency both represent the unit area energy efficiency, so that the problem that the energy efficiency detection is inaccurate due to the fact that the actually used room area changes caused by opening or quitting a room in a hotel can be avoided. Meanwhile, because the first unit area energy efficiency and the second unit area energy efficiency calculated by the method can be used for determining the energy-saving efficiency without long-time data statistics as in the conventional technical scheme, the method for detecting the energy-saving efficiency of the central air conditioner can be used for calculating the energy-saving efficiency only by using detection data in a very short time.
In some embodiments, calculating the first energy efficiency per unit area based on the first total energy consumption comprises:
acquiring the opening time of each room within a first preset time length;
determining a first accumulated area according to the opening time of each room and the pre-acquired room area corresponding to each room;
and determining a first unit area energy efficiency according to the first total energy consumption and the first accumulated area.
When calculating the first unit area energy efficiency within the first preset time period, it is first necessary to determine the room number of the room to be opened within the first preset time period and the opening time of each room, and for the room to be opened within the first preset time period, it is necessary to determine the room area of each room, and the room area and the room number may be stored in the control center 300 in advance, and when determining which room is in an open state, it is only necessary to obtain the corresponding room area by the room number. After the room area of each opening room and the opening time of each room are determined, the accumulated area can be further calculated, and then division operation is performed by using the first total energy consumption and the first accumulated area, so that the first unit area energy efficiency can be determined.
In some embodiments, determining the first cumulative area according to the opening time of each room and the pre-acquired room area corresponding to each room includes:
determining a plurality of first room opening durations by taking each room change as a time node within a first preset time length;
determining a corresponding first room opening area in each first room opening duration according to the room area corresponding to each room;
and determining a first accumulated area according to the first opening time lengths and the first opening areas.
In actual detection, there may be room variation within a first preset time period, and in this case, the cumulative area cannot be determined simply by directly using the product of the first preset time period and the room area. At this time, it is necessary to determine a plurality of first room opening durations by taking each room change as a time node, and by using the time node and a starting time of the first preset time length, for example, when a room is returned or opened, one time node is recorded. Specifically, taking an hour as an example, if the room is returned at twenty minutes and forty minutes, two time nodes are recorded at twenty minutes and forty minutes, and then three first sub-room opening times (the first twenty minutes, the middle twenty minutes, and the last twenty minutes) are jointly divided by using the starting time and the ending time of the first preset time length.
After the first child opening times are determined, the number of the room to be opened within each first child opening time and the area of the room corresponding to each number can be determined in sequence, then multiplication operation can be performed on the first child opening time within each first child opening time and the area of the room to obtain a plurality of first opening areas, and then the first opening areas are summed to obtain a first accumulated area. The first accumulated area obtained in the mode fully considers the influence caused by room opening and room returning in the detection time, so that the energy efficiency of the unit area can be calculated more accurately.
In some embodiments, calculating the second energy efficiency per unit area based on the second total energy consumption comprises:
acquiring the opening time of each room within a second preset time length;
determining a second accumulated area according to the opening time of each room and the pre-acquired room area corresponding to each room;
and determining a second energy efficiency per unit area according to the second total energy consumption and the second cumulative area.
When calculating the energy efficiency of the second unit area within the second preset time period, it is first necessary to determine the room number of the room to be opened within the second preset time period and the opening time of each room, and for the room to be opened within the second preset time period, it is necessary to determine the room area of each room, and the room area and the room number may be stored in the control center 300 in advance, and when determining which room is in an open state, it is only necessary to obtain the corresponding room area by the room number. After the room area of each opened room and the opening time of each room are determined, the accumulated area can be further calculated, and then division operation is performed by using the second total energy consumption and the second accumulated area, so that the second unit area energy efficiency can be determined.
In some embodiments, determining the second cumulative area according to the opening time of each room and the pre-acquired room area corresponding to each room includes:
determining a plurality of second room opening durations by taking each room change as a time node within a second preset time length;
determining a corresponding second room opening area in each second room opening duration according to the room area corresponding to each room;
and determining a second accumulated area according to the second opening time lengths and the second opening areas.
In actual detection, there may be room variation within a second preset time period, and in this case, the cumulative area cannot be determined simply by directly using the product of the second preset time period and the room area. At this time, it is necessary to determine a plurality of second opening time lengths by using the time node and the starting time of the second preset time length with each room change as the time node, for example, when a room is returned or opened, one time node is recorded. Specifically, taking an hour as an example, if the room is returned at twenty minutes and forty minutes, two time nodes are recorded at twenty minutes and forty minutes, and then three second sub-room opening times (the first twenty minutes, the middle twenty minutes, and the last twenty minutes) are jointly divided by using the starting time and the ending time of the second preset time length.
After the plurality of second house opening times are determined, the house number of the room to be opened in each second house opening time and the room area corresponding to each house number can be sequentially determined, then multiplication operation can be performed on the second house opening time and the room area in each second house opening time to obtain a plurality of second house opening areas, and then the plurality of second house opening areas are summed to obtain a second accumulated area. The second accumulated area obtained in the mode fully considers the influence caused by opening and returning in the detection time, so that the energy efficiency of the unit area can be calculated more accurately.
Referring to fig. 2, in some embodiments, the central air-conditioning energy-saving efficiency detecting method further includes the steps of:
acquiring a plurality of first total energy consumptions and a plurality of second total energy consumptions;
determining a plurality of first unit area energy efficiencies according to the plurality of first total energy consumptions;
determining a plurality of second energy efficiencies per unit area based on the plurality of second total energy consumptions;
obtaining a plurality of first energy-saving efficiencies according to the plurality of first unit area energy efficiencies and the corresponding plurality of second unit area energy efficiencies;
a plurality of second energy-saving efficiencies are determined according to the plurality of first energy-saving efficiencies.
When energy saving efficiency is performed, in order to further reduce detection errors, a plurality of first total energy consumptions and a plurality of second total energy consumptions are obtained, and a first unit area energy efficiency and a second unit area energy efficiency corresponding to each first total energy consumption and each second total energy consumption are calculated. And then, a plurality of first energy-saving efficiencies can be calculated by using each first unit area energy efficiency and a second unit area energy efficiency corresponding to each first unit area energy efficiency. And finally, calculating the average value of the plurality of first energy-saving efficiencies to obtain a second energy-saving efficiency. The second energy-saving efficiency may represent the accuracy of the energy-saving efficiency of the energy-saving system more accurately than the first energy-saving efficiency.
In some embodiments, obtaining the first plurality of total energy consumptions and the second plurality of total energy consumptions comprises:
and alternately acquiring a plurality of first total energy consumptions and a plurality of second total energy consumptions in a time domain sequence.
In practical application, the first preset time length and the second preset time length corresponding to the plurality of first total energy consumptions and the plurality of second total energy consumptions are alternately and continuously set in the time domain, so that errors in calculating the second energy-saving efficiency can be better reduced.
In some embodiments, determining a plurality of second energy-saving efficiencies from the plurality of first energy-saving efficiencies includes:
and removing the minimum value and the maximum value in the plurality of first energy-saving efficiencies, and carrying out average value calculation to obtain a second energy-saving efficiency.
In order to further reduce the error in calculation, the minimum value and the maximum value in the first energy-saving efficiency are removed to eliminate the error introduced by single error data.
In some embodiments, the first preset length of time coincides with the second preset length of time. The time lengths are consistent, errors caused by inconsistent detection time lengths can be reduced, and detection errors are further reduced.
In order to better describe the energy-saving efficiency detection method of the central air conditioner according to the embodiment of the present invention, a specific embodiment is described herein, in which in the example, the first preset time length is consistent with the second preset time length, N first preset time lengths and N second preset time lengths are detected, the N first preset time lengths and the N second preset time lengths are alternately and continuously set in a time domain, and one adjacent first preset time length and one adjacent second preset time length serve as a detection sub-period, that is, the entire detection process includes N detection sub-periods.
Acquiring N first total energy consumptions and N second total energy consumptions;
determining a first accumulated area within each first preset time length; each first cumulative area is obtained by the following steps: the method comprises the steps of taking time nodes (change nodes of rooms each time are taken as the basis for setting the time nodes) in corresponding first preset time length as dividing points to obtain a plurality of first room opening time lengths, determining rooms in the room opening state (namely, rooms with room cards inserted and power supplied in the rooms) in each first room opening time length, and determining the product of the first room opening time length and the total room area in the current first room opening time length according to the preset room area corresponding to each room number to obtain a first accumulated area.
Similarly, determining a second accumulated area within each second preset time length; each second cumulative area is obtained by the following steps: and taking the time nodes (the change node of each room is taken as the basis for setting the time nodes) in the corresponding second preset time length as dividing points to obtain a plurality of second room opening durations, determining the rooms in the room opening state (namely, the room cards in the rooms are inserted and the rooms are powered) in each second room opening duration, and determining the product of the second room opening duration and the total room area in the current second room opening duration according to the preset room area corresponding to each room number to obtain a second accumulated area.
Then, N first energy efficiencies per unit area may be calculated by using each first cumulative area and the corresponding first total energy consumption, and similarly, N second energy efficiencies per unit area may be calculated by using each second cumulative area and the corresponding second total energy consumption.
And calculating first energy-saving efficiency in each detection value period according to the calculated N first unit area energy efficiencies and the calculated N second unit area energy efficiencies.
And removing the maximum value and the minimum value in the N first energy-saving efficiencies, and carrying out mean value operation on the rest N-2 first energy-saving efficiencies to obtain the final second energy-saving efficiency.
It should be noted that, the manner in the above embodiment may be adopted, that is, the first cumulative area in each first room opening duration is calculated by obtaining the time node in the first preset time length; in other modes, the first accumulated area can be obtained by directly determining the product of the opening time of each room and the area of the corresponding room in each first preset time length and then accumulating. Specifically, assuming that there are three rooms 1, 2, and 3, the corresponding areas of the three rooms are S1, S2, and S3, the first preset time length includes two first room opening durations, and in the first room opening duration T1, the room 1 and the room 2 are put into use, and in the second first room opening duration T2, the three rooms 1, 2, and 3 are all put into use, in this case, the first cumulative area is calculated as (S1 + S2) × T1+ (S1 + S2+ S3) = (T1 + T2) = S1+ (T1 + T2) × S2+ T2= S3 by using the first method; the first cumulative area calculated in the second way is (T1 + T2) × S1+ (T1 + T2) × S2+ T2 × S3; therefore, although the calculation processes of the two modes are different, the calculation results are completely the same, and the specific selection of which mode can be determined according to the actual selection requirements.
As shown in fig. 3, an embodiment of the present invention further provides a system for detecting energy-saving efficiency of a central air conditioner, where the system for detecting energy-saving efficiency of a central air conditioner includes: the system comprises a power acquisition module 100, a control center 300 and a plurality of terminal devices 200.
The electric quantity obtaining module 100 is used for obtaining the energy consumption of the central air-conditioning system;
the terminal devices 200 are arranged in the rooms in a one-to-one correspondence manner, and the terminal devices 200 are all used for controlling the operation of the air conditioning device in the corresponding room and feeding back the using state of the room;
the control center 300 is connected to the power acquiring module 100 and the plurality of terminal devices 200, respectively, and is configured to execute the above method for detecting energy saving efficiency of the central air conditioner.
The electric quantity acquisition module 100 directly sets up the end of getting at central air conditioning system to can be directly effectual the electric quantity information of gathering central air conditioning system, the electric quantity acquisition module 100 can chase after the ammeter that adopts to have communication function can, for example, possess RS485 communication function, thing networking communication function or wifi function. The control center 300 may determine the energy consumption in each time period by communicating with the power acquisition module 100. The plurality of terminal apparatuses 200 are mainly used to control the operation of the air conditioning devices in the respective rooms and to feed back whether each room has been put into use, for example: the work of a fan and chilled water in a room is controlled, and whether the room is used or not is determined by detecting the insertion state of a house card.
The control center 300 may perform the central air-conditioning energy-saving efficiency detection method according to the above-described embodiment of the present invention on the premise of obtaining the room usage status and the total energy consumption of each room, thereby determining the energy-saving efficiency of the central air-conditioning system. In some embodiments, the control center 300 may directly employ a server, a desktop computer, or the like, or may directly utilize a background server of the hotel.
In hotels, municipal buildings or commercial buildings, a central air conditioning system is mostly directly adopted for temperature regulation. When the energy consumption of the central air-conditioning system needs to be detected, the electric quantity obtaining module 100, such as an electric meter, only needs to be directly installed from the electricity taking position on one side of the central air-conditioning system for measurement. The total energy consumption read by the electric meter in the first preset time length is the first total energy consumption, and the total energy consumption read by the electric meter in the second preset time length is the second total energy consumption. It should be noted that the energy saving system of the central air conditioning system is turned on within the first preset time period to operate in the energy saving mode, and the energy saving system of the central air conditioning system is not turned on within the second preset time period to operate in the normal operation mode.
At this time, if the energy saving efficiency is calculated by directly using the first total energy consumption and the second total energy consumption, the calculation may be deviated because the number and size of the rooms in which the air conditioners are specifically used in the first preset time period and the second preset time period cannot be determined. The energy-saving efficiency detection method of the central air conditioner in the embodiment of the invention adopts a mode of calculating the energy efficiency of unit area to effectively solve the problem. After the first total energy consumption is determined, the first energy efficiency per unit area may be calculated by using the first total energy consumption, the predetermined room areas and the number of the rooms opened within the first preset time length, and similarly, after the second total energy consumption is determined, the second energy efficiency per unit area may be calculated by using the second total energy consumption, the predetermined room areas and the number of the rooms opened within the second preset time length. And finally, calculating the first energy-saving efficiency by using the first unit area energy efficiency and the second unit area energy efficiency. It is to be understood that the energy saving efficiency calculation refers to a smaller ratio of energy consumption after the energy saving system is turned on relative to before it is turned on.
In the energy-saving efficiency detection system of the central air conditioner, the first unit area energy efficiency and the second unit area energy efficiency both represent the unit area energy efficiency, so that the problem that the energy efficiency detection is inaccurate due to the fact that the actually used room area changes caused by opening or quitting a room in a hotel can be avoided. Meanwhile, because the first unit area energy efficiency and the second unit area energy efficiency calculated by the method can be used for determining the energy-saving efficiency without long-time data statistics as in the conventional technical scheme, the energy-saving efficiency detection system of the central air conditioner can be used for calculating the energy-saving efficiency only by using detection data in a very short time.
Referring to fig. 4, in some embodiments, terminal device 200 includes: the house card detection module 210, the local controller 220, the display and control device 230 and the communication module 240.
A house card detection module 210 for detecting a house card insertion state in a room;
a local controller 220 connected to the room card detecting module 210;
a display control device 230 connected to the local controller 220;
and the communication module 240 is connected with the local controller 220 and is used for data interaction with the control center 300.
Whether the house card can be quickly detected through the house card detection module 210 to be inserted or not, so that the current room is determined to be put into use, the control center 300 is communicated with the terminal equipment 200 through the communication module 240, so that the using state information of the room can be known, and further, the control instruction can be further sent to the terminal equipment 200 to complete the control of the fan and the refrigerant water, wherein the refrigerant water is controlled only by cutting off and switching on a two-way valve between the central air-conditioning system and the room. In some embodiments, the communication module 240 may employ an RS485 module, a WiFi module, or the like.
Specifically, the terminal device 200 may be placed in a ceiling of a room, the local controller 220 is connected to the fan and the two-way valve, and the local controller 220 is connected to the temperature control smart screen. The local controller 220 is connected with an RS485 module, and the RS485 module supports broadcast addresses; local controller 220 is provided with room card switch detection module, and when the room card inserts the electricity of getting, the last corresponding detection port of local controller 220 has high level signal discrepancy to confirm that it is in the state of opening a house at present. On the contrary, when the house card is pulled out, the high level signal disappears, and the house card is in a room returning state.
Furthermore, an embodiment of the present invention also provides a computer-readable storage medium, which stores computer-executable instructions, which are executed by a processor or a controller, and can cause the processor to execute the central air-conditioning energy-saving efficiency detection method in the above-described embodiments, for example, the method in fig. 2 and the method in fig. 3 described above.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media or non-transitory media and communication media or transitory media. The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks, DVD, or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, 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 includes any information delivery media as known to those skilled in the art.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. A method for detecting energy-saving efficiency of a central air conditioner is characterized by comprising the following steps:
acquiring first total energy consumption of a central air-conditioning system within a first preset time span and second total energy consumption of the central air-conditioning system within a second preset time span; starting an energy-saving system within the first preset time length, stopping the energy-saving system within the second preset time length, wherein the energy-saving system is used for reducing the operation energy consumption of the central air-conditioning system;
calculating a first unit area energy efficiency according to the first total energy consumption;
calculating a second energy efficiency per unit area according to the second total energy consumption;
and determining a first energy-saving efficiency according to the first unit area energy efficiency and the second unit area energy efficiency.
2. The method for detecting energy-saving efficiency of a central air conditioner according to claim 1, wherein the calculating a first energy efficiency per unit area according to the first total energy consumption includes:
acquiring the opening time of each room within the first preset time length;
determining a first accumulated area according to the opening time of each room and the pre-acquired room area corresponding to each room;
and determining the first unit area energy efficiency according to the first total energy consumption and the first accumulated area.
3. The method for detecting energy-saving efficiency of a central air conditioner according to claim 2, wherein the determining a first cumulative area according to the opening time of each room and the pre-acquired room area corresponding to each room comprises:
determining a plurality of first room opening durations by taking each room change as a time node within the first preset time length;
determining a corresponding first room opening area within each first room opening duration according to the room area corresponding to each room;
and determining the first accumulated area according to the plurality of first open-house time lengths and the plurality of first open-house areas.
4. The method for detecting energy-saving efficiency of a central air conditioner according to claim 1, wherein the calculating a second energy efficiency per unit area according to the second total energy consumption comprises:
acquiring the opening time of each room within the second preset time length;
determining a second accumulated area according to the opening time of each room and the pre-acquired room area corresponding to each room;
and determining the second energy efficiency per unit area according to the second total energy consumption and the second accumulated area.
5. The method for detecting energy-saving efficiency of a central air conditioner according to claim 4, wherein the determining a second cumulative area according to the opening time of each room and the pre-acquired room area corresponding to each room comprises:
determining a plurality of second room opening durations by taking each room change as a time node within the second preset time length;
determining a corresponding second room opening area in each second room opening duration according to the room area corresponding to each room;
and determining the second accumulated area according to the plurality of second room opening durations and the plurality of second room opening areas.
6. The energy-saving efficiency detection method for the central air conditioner according to claim 1, characterized in that the energy-saving efficiency detection method for the central air conditioner further comprises the following steps:
obtaining a plurality of first total energy consumptions and a plurality of second total energy consumptions;
determining a plurality of first energy efficiencies per unit area according to the plurality of first total energy consumptions;
determining a plurality of second energy efficiencies per unit area based on the plurality of second total energy consumptions;
obtaining a plurality of first energy-saving efficiencies according to the plurality of first unit area energy efficiencies and the plurality of corresponding second unit area energy efficiencies;
and determining a plurality of second energy-saving efficiencies according to the plurality of first energy-saving efficiencies.
7. The method for detecting energy-saving efficiency of a central air conditioner according to claim 6, wherein the obtaining the plurality of first total energy consumptions and the plurality of second total energy consumptions comprises:
and alternately acquiring a plurality of first total energy consumptions and a plurality of second total energy consumptions in a time domain sequence.
8. The utility model provides a central air conditioning energy-saving efficiency detecting system which characterized in that includes:
the electric quantity acquisition module is used for acquiring the energy consumption of the central air-conditioning system;
the terminal devices are arranged in the rooms in a one-to-one correspondence mode and are all used for controlling the operation of the air conditioning device in the corresponding room and feeding back the use state of the room;
and the control center is respectively connected with the electric quantity acquisition module and the plurality of terminal devices and is used for executing the energy-saving efficiency detection method of the central air conditioner according to any one of claims 1 to 7.
9. The central air-conditioning energy-saving efficiency detection system according to claim 8, characterized in that the terminal device comprises:
the house card detection module is used for detecting the insertion state of the house card in a room;
the local controller is connected with the house card detection module;
the display control device is connected with the local controller;
and the communication module is connected with the local controller and used for carrying out data interaction with the control center.
10. A computer-readable storage medium, characterized in that: the computer-readable storage medium stores computer-executable instructions for causing a computer to perform the central air-conditioning energy saving efficiency detecting method as set forth in any one of claims 1 to 7.
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