CN113739397A - Central air-conditioning system and energy-saving control method and readable storage medium thereof - Google Patents

Central air-conditioning system and energy-saving control method and readable storage medium thereof Download PDF

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Publication number
CN113739397A
CN113739397A CN202111015163.3A CN202111015163A CN113739397A CN 113739397 A CN113739397 A CN 113739397A CN 202111015163 A CN202111015163 A CN 202111015163A CN 113739397 A CN113739397 A CN 113739397A
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cold
heat source
source equipment
energy
saving control
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CN113739397B (en
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胡佳
杨瑞
谭江浩
董海雷
李申
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Guangzhou Huidian Cloud Internet Technology Co ltd
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Guangzhou Huidian Cloud Internet Technology Co ltd
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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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • 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
    • 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
    • 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
    • F24F11/65—Electronic processing for selecting an operating mode
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a central air-conditioning system, an energy-saving control method thereof and a readable storage medium. The system comprises cold and heat source equipment and a universal energy-saving control device comprising a universal control unit, a data communication interface, an input interface and an output interface, wherein the universal control unit is respectively connected with the data communication interface, the input interface and the output interface, the input interface is used for being respectively connected with a terminal temperature and humidity sensor, a meteorological sensor and a cold and heat source equipment monitoring sensor, the output interface is respectively connected with the corresponding cold and heat source equipment, and the data communication interface is used for being universally connected with external intelligent control equipment. The general control unit is used for acquiring and analyzing the operation data and the set parameters of the cold and heat source equipment, the terminal temperature and humidity and the weather data, and then performing energy-saving control on the cold and heat source equipment according to the analysis result. The invention solves the problems of high debugging professional degree, more manpower and time consumption and high debugging cost in the energy-saving debugging process of the central air-conditioning system.

Description

Central air-conditioning system and energy-saving control method and readable storage medium thereof
Technical Field
The invention relates to the technical field of building energy conservation and intelligent control, in particular to a central air-conditioning system, an energy-saving control method thereof and a readable storage medium.
Background
The central air conditioning system consists of one or more cold and heat source devices and a plurality of air conditioning systems, and the systems intensively process air to meet the comfort requirement, thereby meeting the cooling capacity requirement of the end devices.
However, when the current central air conditioning system is installed in a building control system, the central air conditioning system is usually required to be debugged to determine whether the installed central air conditioning system meets the requirement of energy saving. In the debugging process, different interfaces need to be replaced and different programs need to be developed, the debugging professional degree is high, more manpower and time need to be consumed, and the debugging cost is high.
Disclosure of Invention
In order to solve the problems, the invention provides a central air-conditioning system, an energy-saving control method thereof and a readable storage medium, which solve the problems of high debugging professional degree, more manpower and time consumption and high debugging cost in the energy-saving debugging process of the central air-conditioning system in the prior art.
A first aspect of the present invention provides a central air conditioning system comprising: the system comprises cold and heat source equipment, tail end equipment, a tail end temperature and humidity sensor, a meteorological sensor, a cold and heat source equipment monitoring sensor and a universal energy-saving control device;
the universal energy-saving control device comprises a universal control unit, a data communication interface, an input interface for signal acquisition and an output interface for signal output, wherein the universal control unit is respectively connected with the data communication interface, the input interface and the output interface, the input interface is used for being respectively connected with the tail end temperature and humidity sensor, the meteorological sensor and the cold and heat source equipment monitoring sensor, the output interface is respectively connected with corresponding cold and heat source equipment, and the data communication interface is used for being universally connected with external intelligent control equipment;
the general control unit is used for acquiring and analyzing the running data and the set parameters of the cold and heat source equipment collected by the cold and heat source equipment monitoring sensor, the terminal temperature and humidity collected by the terminal temperature and humidity sensor and the weather data collected by the weather sensor, and then performing energy-saving control on the cold and heat source equipment according to the analysis result.
Preferably, the data communication interface comprises one or more of an RS-232 serial port, an RS-485 serial port, an Ethernet, a USB interface and a wireless interface.
Preferably, the protocol of the data communication interface includes one or more of Modbus, BACnet and Lonwork.
Preferably, the general control unit is further configured to perform energy saving control on the cold and heat source device according to the analysis result and the energy saving condition; the energy-saving conditions comprise that the temperature and the humidity at the tail end do not exceed a set limit value and the energy consumption of cold and heat source equipment meets a minimization principle.
Preferably, the general control unit is further configured to:
when the cold and heat source equipment is a water chilling unit, a water-ground source heat pump unit or an air source heat pump unit, judging the operation mode of the cold and heat source equipment;
when the operation mode of the cold and heat source equipment is judged to be a refrigeration mode, determining that the adjustment step length is a positive value so as to improve the outlet water temperature set value of the cold and heat source equipment, and performing energy-saving control on the cold and heat source equipment according to the updated outlet water temperature set value of the cold and heat source equipment;
and when the operation mode of the cold and heat source equipment is judged to be a heating mode, determining that the adjusting step length is a negative value so as to reduce the set value of the outlet water temperature of the cold and heat source equipment, and performing energy-saving control on the cold and heat source equipment according to the updated set value of the outlet water temperature of the cold and heat source equipment.
Preferably, the general control unit is further configured to:
and when the cold and heat source equipment is a direct-fired unit, an electric boiler, an electric heat storage boiler, a gas boiler or an oil boiler, determining that the adjusting step length is a negative value so as to reduce the set value of the outlet water temperature of the cold and heat source equipment, and performing energy-saving control on the cold and heat source equipment according to the updated set value of the outlet water temperature of the cold and heat source equipment.
A second aspect of the present invention provides an energy saving control method for a central air conditioning system, which is applied to the central air conditioning system according to any one of the above embodiments, and the energy saving control method includes:
acquiring and analyzing the operation data and the set parameters of the cold and heat source equipment, and the terminal temperature and humidity and weather data;
and performing energy-saving control on the cold and heat source equipment according to the analysis result.
Preferably, the performing energy-saving control on the cold and heat source device according to the analysis result includes:
performing energy-saving control on the cold and heat source equipment according to the analysis result and the energy-saving condition; the energy-saving conditions comprise that the temperature and the humidity at the tail end do not exceed a set limit value and the energy consumption of cold and heat source equipment meets a minimization principle.
Preferably, the performing energy-saving control on the cold and heat source device according to the analysis result and the energy-saving condition includes:
when the cold and heat source equipment is a water chilling unit, a water-ground source heat pump unit or an air source heat pump unit, judging the operation mode of the cold and heat source equipment; when the operation mode of the cold and heat source equipment is judged to be a refrigeration mode, determining that the adjustment step length is a positive value so as to improve the outlet water temperature set value of the cold and heat source equipment, and performing energy-saving control on the cold and heat source equipment according to the updated outlet water temperature set value of the cold and heat source equipment; when the operation mode of the cold and heat source equipment is judged to be a heating mode, determining that the adjusting step length is a negative value so as to reduce the set value of the outlet water temperature of the cold and heat source equipment, and performing energy-saving control on the cold and heat source equipment according to the updated set value of the outlet water temperature of the cold and heat source equipment;
and when the cold and heat source equipment is a direct-fired unit, an electric boiler, an electric heat storage boiler, a gas boiler or an oil boiler, determining that the adjusting step length is a negative value so as to reduce the set value of the outlet water temperature of the cold and heat source equipment, and performing energy-saving control on the cold and heat source equipment according to the updated set value of the outlet water temperature of the cold and heat source equipment.
A third aspect of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements an energy saving control method of a central air conditioning system as described in any one of the above embodiments.
Compared with the prior art, the central air-conditioning system, the energy-saving control method thereof and the readable storage medium have the advantages that:
by configuring a universal data communication interface for the universal energy-saving control device of the cold and heat source equipment, when the central air-conditioning system is debugged, the external intelligent control equipment (such as a test upper computer) can be quickly connected with the universal energy-saving control device of each cold and heat source equipment through the universal data communication interface. In addition, the general energy-saving control device of the cold and heat source equipment can also be quickly connected with various data acquisition devices, such as a terminal temperature and humidity sensor, a meteorological sensor and a cold and heat source equipment monitoring sensor, through the input interface, so that the cold and heat source equipment is subjected to energy-saving debugging according to the acquired data, and the problems of high debugging professional degree, high labor and time consumption and high debugging cost in the energy-saving debugging process of the central air conditioning system in the prior art are solved. Meanwhile, after the debugging is finished, the central air-conditioning system can also perform energy-saving control on cold and heat source equipment of the current building according to the structure, so that an optimal energy-saving state is achieved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a central air conditioning system according to an embodiment of the present invention;
fig. 2 is a flowchart of an energy saving control method of a central air conditioning system according to an embodiment of the present invention;
fig. 3 is a block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.
A first aspect.
Referring to fig. 1, the present invention provides a central air conditioning system 100, including: the system comprises a cold and heat source device 110, a terminal device 120, a terminal temperature and humidity sensor 130, a meteorological sensor 140, a cold and heat source device monitoring sensor 150 and a general energy-saving control device 160.
The general energy-saving control device 160 comprises a general control unit 161, a data communication interface 162, an input interface 163 for signal acquisition and an output interface 164 for signal output, the general control unit 161 is respectively connected with the data communication interface 162, the input interface 163 is connected with the output interface 164, the input interface 163 is used for respectively connecting with the terminal temperature and humidity sensor 130, the weather sensor 140, the cold and heat source equipment monitoring sensor 150, the output interface 164 is respectively connected with the corresponding cold and heat source equipment 110, and the data communication interface 162 is used for being commonly connected with external intelligent control equipment.
The general control unit 161 is configured to acquire and analyze the operation data and the setting parameters of the cooling and heating source device 110 collected by the cooling and heating source device monitoring sensor 150, the terminal temperature and humidity collected by the terminal temperature and humidity sensor 130, and the weather data collected by the weather sensor 140, and then perform energy saving control on the cooling and heating source device 110 according to the analysis result.
In order to solve the problems of high debugging professional level, high labor and time consumption and high debugging cost in the energy-saving debugging process of the central air-conditioning system in the prior art, the embodiment of the invention provides the general energy-saving control device 160 for the cold and heat source equipment 110 of the central air-conditioning system 100. The cold and heat source device 110 includes, but is not limited to, a chiller, a ground source heat pump, an air source heat pump, a direct-fired unit, an electric boiler, an electric heat storage boiler, a gas boiler, or an oil boiler.
Specifically, the general energy-saving control device 160 of the cold and heat source device 110 is configured with a general data communication interface 162, and the data communication interface 162 refers to a channel used by the cold and heat source device control device for signal transmission. The communication protocol refers to rules and conventions that must be followed by both entities to complete communication or service, and defines the format used by the data unit, the information and meaning that the information unit should contain, the connection mode, and the timing sequence of information transmission and reception. The data communication interface 162 and its corresponding protocol may be provided by the manufacturer.
In one embodiment, the data communication interface 162 includes one or more of an RS-232 serial port, an RS-485 serial port, an ethernet, a USB interface, and a wireless interface.
It can be understood that the interfaces are common data communication interfaces for RS-232 serial ports, RS-485 serial ports, Ethernet, USB interfaces and wireless interfaces. In this way, when the central air conditioning system 100 is debugged, the external intelligent control device (e.g., a test upper computer) can be quickly connected to the general energy saving controller 160 of each of the heat source devices 110 through the general data communication interface 162, and the general energy saving controller 160 of the heat source device 110 can also be quickly connected to various data acquisition devices, such as the terminal temperature and humidity sensor 130, the weather sensor 140, the heat source device monitoring sensor 150, and the like, through the input interface 163, so that the heat source device 110 can be debugged in an energy saving manner according to the acquired data. The terminal temperature/humidity sensor 130 is configured to obtain a temperature and a humidity at the terminal. Weather sensor 140 users acquire weather data to assist in predicting changes in the magnitude of end loads. The heat source device monitoring sensor 150 is used to acquire operation data of the heat source device 110.
In addition, after the commissioning is completed, the central air conditioning system 100 can also perform energy saving control on the cold and heat source device 110 of the current building according to the above-mentioned architecture, so as to achieve an optimal energy saving state.
Preferably, for the cold heat source device 110, the commonly used data communication interfaces 162 are an RS-232 serial port and an RS-485 serial port.
Preferably, the protocol of the data communication interface 162 includes one or more of Modbus, BACnet and Lonwork.
In the present embodiment, the communication protocols used for the cold heat source device 110 include Modbus, BACnet, Lonwork, and the like.
The Modbus technology has become an industrial standard, and other communication media such as an RS232 serial port and an RS485 serial port are mainly used for communication. It provides an open, flexible and standard communication technology for users, and reduces the development and maintenance cost. Specifically, the Modbus communication protocol establishes a message format by the master device, wherein the message format comprises a device address, a function code, a data address and error checking. The slave device must create a reply message using the Modbus protocol in a format that contains the confirmed function code, return data and error checking. If the received data is in error or the slave device is unable to execute the required command, the slave device will return an error message. During communication over the Modbus network, the communication protocol can recognize device addresses, messages, commands, and data and other information contained in the messages, and if the protocol requires a reply from a device, the slave device will construct a message and send it using the Modbus.
BACnet is a data communication protocol of building automatic control system, which is composed of a series of communication protocols related to software and hardware, and defines all conversation modes between computer controllers. The protocol comprises the following steps: (1) the electronic signal characteristics used by the selected communication medium, how to identify the computer network address, and when and how to use the computer network. (2) Error checking, data compression and encoding, and information formats specific to each computer. The BACnet protocol consists of the following parts: the building automatic control equipment function and information data expression mode, five standard local area network communication protocols and the protocol used for mutual communication between them.
The Lonwork technology is a general Bus, and can be simultaneously applied to any layer of buses such as Sensor Bus, Device Bus, Field Bus and the like in an industrial control system. In addition to a bus type network structure, the Lonwork technology can also be used by users in any form of network topology structure. The network communication medium is also not limited, and may be twisted pair, power line, optical fiber, wireless, infrared, etc., and may be used in combination in the same network.
It can be understood that according to the specific cold/heat source device 110, the device operation status and the point location parameter can be read by using the corresponding interface type and the communication protocol.
In one embodiment, the general control unit 161 is further configured to perform energy saving control on the cold and heat source device 110 according to the analysis result and the energy saving condition; the energy saving conditions include that the temperature and humidity at the tail end do not exceed a preset limit value and that the energy consumption of the cold and heat source equipment 110 meets a minimization principle.
In the embodiment of the present invention, the cores of the energy saving control of the general energy saving control device 160 are: on the premise of meeting the requirement of terminal temperature and humidity comfort, the power consumption (or energy consumption) of the cold and heat source equipment 110 is minimum.
Specifically, the temperature and humidity of the terminal monitoring point are controlled quantities, actual temperature and humidity data of the terminal device are obtained through the reading of the terminal temperature and humidity sensor 130, weather data are obtained through the weather sensor 140, adjustment output is calculated, and further, the operation parameters of the controlled object (the cold and heat source device 110) are adjusted and set, so that the operation energy consumption of the cold and heat source device 110 is expected to be adjusted towards the direction of reduction on the premise that the terminal temperature and humidity do not exceed the limit value.
In a specific embodiment, the general control unit 161 is specifically configured to determine a set value of the outlet water temperature of the cooling and heating source device 110 according to the analysis result and the energy saving condition, and perform energy saving control on the cooling and heating source device 110 according to the set value of the outlet water temperature of the cooling and heating source device 110.
In order to determine the set value of the outlet water temperature of the cold-heat source device 110, in a specific embodiment, the general control unit 161 is further configured to:
judging whether the temperature and humidity at the tail end exceed set limit values or not;
if not, predicting the size change of the terminal load according to the weather data, determining the adjustment step length of the set value of the outlet water temperature of the cold and heat source equipment 110 by combining the allowance of the terminal temperature lower than the temperature set limit value, then setting a new set value of the outlet water temperature of the cold and heat source equipment 110 according to the adjustment step length, and performing energy-saving control on the cold and heat source equipment 110 according to the updated set value of the outlet water temperature of the cold and heat source equipment 110.
In order to ensure the comfort level of the terminal temperature and humidity, the general energy-saving control device 160 needs to first determine whether the terminal temperature and humidity exceeds a set value when performing energy-saving control on the cold and heat source device 110. If the temperature and humidity comfort level of the current tail end does not reach the standard, the general energy-saving control device 160 does not further correct the set value of the outlet water temperature of the cold and heat source equipment 110 on the basis. If the temperature and humidity of the current tail end does not exceed the preset temperature and humidity, the temperature and humidity comfort level of the current tail end is up to the standard, and the universal energy-saving control device 160 further corrects the set value of the outlet water temperature of the cold and heat source equipment 110 on the basis.
The basis for the correction is as follows: and calculating the temperature margin of the up-to-standard terminal equipment, and taking the minimum value. For the summer cooling working condition, if the terminal temperature is lower than the current terminal temperature set limit value, the current terminal temperature allowance is equal to the terminal temperature upper set limit value-terminal temperature measured value; for the winter heating condition, the current terminal temperature allowance is equal to a terminal temperature measurement value-a terminal temperature lower limit value. And further predicting the size change of the terminal load according to the weather data to obtain the change trend of the terminal load along with the time. The size of the adjustment step length of the set value of the outlet water temperature of the cold and heat source device 110 is determined by the current terminal temperature allowance and the trend of the terminal load amount changing with time, and the set value of the outlet water temperature of the cold and heat source device 110 is equal to the original outlet water temperature set value plus or minus the adjustment step length, so that the set value of the outlet water temperature of the cold and heat source device 110 is finally increased or decreased, and the energy-saving effect is achieved.
Further, in order to determine the set values of the water temperatures of the different types of cold and heat source devices 110, in a specific embodiment, the general control unit 161 is further configured to:
when the cold and heat source device 110 is a water chiller, a water-ground source heat pump or an air source heat pump, determining an operation mode of the cold and heat source device 110;
when the operation mode of the cold and heat source device 110 is judged to be the cooling mode, determining that the adjustment step length is a positive value so as to improve the set value of the outlet water temperature of the cold and heat source device 110;
when the operation mode of the cold and heat source device 110 is determined to be the heating mode, it is determined that the adjustment step size is a negative value, so as to reduce the set value of the outlet water temperature of the cold and heat source device 110.
For different cold and heat source devices 110, the specific energy saving control modes of the general energy saving control device 160 are different, and the energy saving effect of the cold and heat source devices 110 can be achieved.
Specifically, for the cold-heat source device 110 that has both the cooling mode and the heating mode, such as a chiller, a ground source heat pump, or an air source heat pump, when the cold-heat source device 110 is in the cooling mode and the heating mode, the directions of reducing the energy consumption of the cold-heat source device 110 are different.
Taking the water chilling unit as an example, when the water chilling unit is in a refrigeration mode, if the temperature and humidity at the tail end are judged to be within the set limit value, the set value of the outlet water temperature of the water chilling unit exists in the upward adjustment space (the direction of energy consumption reduction of the water chilling unit), and accordingly the direction of water temperature adjustment can be determined to be the upward adjustment water temperature. The direction of the magnitude change of the terminal load can be predicted by considering the change of weather data (environmental temperature), and the specific adjusting step can be determined by combining the terminal temperature margin. That is, the specific energy-saving control of the universal energy-saving control device 160 of the cold and heat source device 110 is based on the premise of meeting the end temperature and humidity target, and when the chiller is in the cooling mode and there is an adjustment space, the set value of the outlet water temperature of the chiller is increased, so as to reduce the energy consumption of the chiller.
Illustratively, when the operation mode of the water chilling unit is judged to be the cooling mode, the adjusting step is determined to be a positive value, the size of the adjusting step is assumed to be i delta T, wherein i is an adjusting parameter, i is 1, 2 and 3 … … n, n is a positive integer, delta T is a single step, and in one embodiment, delta T is 0.1 ℃, and the set value T of the outlet water temperature of the water chilling unit is combined with the allowance that the tail end temperature is lower than the set limit value1Original water temperature set value T0+ the size of the step size n Δ T. The n of the adjusting step length is determined by the terminal temperature margin and the variation trend of the terminal load capacity along with the time, and when the terminal load capacity is changed for a certain time, the larger the terminal temperature margin is, the larger the n is; when the terminal temperature margin is constant, n is larger as the terminal load amount changes. Finally, the set value of the outlet water temperature of the water chilling unit is improved, and the energy-saving effect is achieved.
When the water chilling unit is in a heating mode, if the temperature and humidity at the tail end are judged to be within the set limit value, a set value of the water outlet temperature of the water chilling unit exists in a down-regulation space (the direction of energy consumption reduction of the water chilling unit), and accordingly the direction of water temperature regulation can be determined to be the down-regulation water temperature. The direction of the magnitude change of the terminal load can be predicted by considering the change of weather data (environmental temperature), and the specific adjusting step can be determined by combining the terminal temperature margin. That is, the specific energy-saving control of the universal energy-saving control device 160 of the cold and heat source device 110 is based on the premise that the target of the terminal temperature and humidity is satisfied, and when the chiller is in the heating mode and there is an adjustment space, the set value of the outlet water temperature of the chiller is reduced, so that the energy consumption of the chiller is reduced.
Illustratively, when the operation mode of the water chilling unit is judged to be the heating mode, the adjusting step length is determined to be a negative value, and the set value of the outlet water temperature of the water chilling unit is equal to the size of the original outlet water temperature set value-the adjusting step length in combination with the allowance that the tail end temperature is lower than the set limit value. The size of the adjusting step length is determined by the change trend of the terminal temperature allowance and the terminal load along with the time, and finally the set value of the outlet water temperature of the water chilling unit is reduced to achieve the energy-saving effect.
Similarly, for other cold and heat source devices 110, the operation parameters of the cold and heat source devices 110 may be adjusted to achieve the purpose of energy saving. For example, under the condition of meeting the requirements of the terminal temperature and humidity, the water outlet temperature set value of the unit can be increased in the refrigeration mode and reduced in the heating mode for the ground source heat pump unit or the air source heat pump unit.
Further, in order to determine the set values of the water temperatures of the different types of cold and heat source devices 110, in a specific embodiment, the general control unit 161 is further configured to:
when the cold and heat source device 110 is a direct-fired unit, an electric boiler, an electric heat storage boiler, a gas boiler or an oil boiler, the adjustment step length is determined to be a negative value so as to reduce the set value of the water outlet temperature of the cold and heat source device 110.
For heat sources such as an electric boiler, an electric heat storage boiler, a gas boiler, and an oil-fired boiler, the energy consumption of the heat source equipment is decreased, and the set value of the outlet water temperature of the heat source equipment is decreased, so that the universal energy-saving control device 160 of the cold and heat source equipment 110 can achieve the energy-saving effect of the heat source equipment by decreasing the set value of the outlet water temperature of the heat source equipment.
In summary, compared to the prior art, the central air conditioning system 100 of the present invention has the following beneficial effects:
by configuring the universal data communication interface 162 for the universal energy-saving control device 160 of the cold and heat source device 110, when the central air conditioning system 100 is debugged, the external intelligent control device (e.g., a test host computer) can be quickly connected to the universal energy-saving control device 160 of each cold and heat source device 110 through the universal data communication interface 162. In addition, the general energy-saving control device 160 of the cold and heat source device 110 can also be quickly connected to various data acquisition devices, such as the terminal temperature and humidity sensor 130, the weather sensor 140, and the cold and heat source device monitoring sensor 150, through the input interface 163, so as to perform energy-saving debugging on the cold and heat source device 110 according to the acquired data, thereby solving the problems of high debugging professional level, high labor and time consumption, and high debugging cost in the energy-saving debugging process of the central air conditioning system in the prior art. Meanwhile, after the debugging is finished, the central air conditioning system 100 can also perform energy saving control on the cold and heat source device 110 of the current building according to the above-mentioned architecture, so as to achieve an optimal energy saving state.
A second aspect.
Referring to fig. 2, the present invention provides an energy saving control method of a central air conditioning system 100, which is applied to the central air conditioning system 100 according to any one of the above embodiments, and the energy saving control method includes the following steps:
s10, acquiring and analyzing the operation data, the set parameters, the terminal temperature and humidity and the weather data of the cold and heat source equipment 110;
and S20, performing energy-saving control on the cold and heat source equipment 110 according to the analysis result.
In one embodiment, the performing energy saving control on the cold/heat source device 110 according to the analysis result in step S20 includes:
s21, performing energy-saving control on the cold and heat source equipment according to the analysis result and the energy-saving condition; the energy-saving conditions comprise that the temperature and the humidity at the tail end do not exceed a set limit value and the energy consumption of cold and heat source equipment meets a minimization principle.
In the embodiment of the present invention, the cores of the energy saving control of the general energy saving control device 160 are: on the premise of meeting the requirement of terminal temperature and humidity comfort, the power consumption (or energy consumption) of the cold and heat source equipment 110 is minimum.
Specifically, the temperature and humidity of the terminal monitoring point are controlled quantities, the feedback of the actual temperature and humidity data of the terminal is obtained through the reading of the terminal temperature and humidity sensor 130, the weather data is obtained by combining the weather sensor 140, the regulation output is calculated, and further the operation parameters of the controlled object (the cold and heat source device 110) are adjusted and set, so that the operation energy consumption of the cold and heat source device 110 is expected to be adjusted towards the direction of reduction on the premise that the terminal temperature and humidity do not exceed the limit value.
In one embodiment, the performing energy saving control on the cold and heat source device according to the analysis result and the energy saving condition in step S21 includes the following steps:
and S211, determining a set value of the outlet water temperature of the cold and heat source equipment 110 according to the analysis result and the energy-saving condition, and performing energy-saving control on the cold and heat source equipment 110 according to the set value of the outlet water temperature of the cold and heat source equipment 110.
In order to determine the set value of the outlet water temperature of the heat source device 110, in an embodiment, the step S211 of determining the set value of the outlet water temperature of the heat source device 110 according to the analysis result and the energy saving condition, and performing the energy saving control on the heat source device 110 according to the set value of the outlet water temperature of the heat source device 110 includes the following steps:
judging whether the temperature and humidity at the tail end exceed set limit values or not;
if not, predicting the size change of the terminal load according to the weather data, determining the adjustment step length of the outlet water temperature of the water chilling unit by combining the allowance of the terminal temperature lower than the temperature set limit value, then setting a new outlet water temperature set value of the cold and heat source equipment 110 according to the adjustment step length, and performing energy-saving control on the cold and heat source equipment 110 according to the updated outlet water temperature set value of the cold and heat source equipment 110.
In order to ensure the comfort level of the terminal temperature and humidity, the general energy-saving control device 160 needs to first determine whether the terminal temperature and humidity exceeds a set value when performing energy-saving control on the cold and heat source device 110. If the temperature and humidity comfort level of the current tail end does not reach the standard, the general energy-saving control device 160 does not further correct the set value of the outlet water temperature of the cold and heat source equipment 110 on the basis. If the temperature and humidity of the current tail end does not exceed the preset temperature and humidity, the temperature and humidity comfort level of the current tail end is up to the standard, and the universal energy-saving control device 160 further corrects the set value of the outlet water temperature of the cold and heat source equipment 110 on the basis.
The basis for the correction is as follows: if the terminal temperature is lower than the current terminal temperature threshold, the current terminal temperature margin is terminal temperature threshold-terminal temperature measurement. And further predicting the size change of the terminal load according to the weather data to obtain the change trend of the terminal load along with the time. The size of the adjustment step length of the set value of the outlet water temperature of the cold and heat source device 110 is determined by the current terminal temperature allowance and the trend of the terminal load amount changing with time, and the set value of the outlet water temperature of the cold and heat source device 110 is equal to the original outlet water temperature set value plus or minus the adjustment step length, so that the set value of the outlet water temperature of the cold and heat source device 110 is finally increased or decreased, and the energy-saving effect is achieved.
Further, in order to determine the set values of the outlet water temperatures of the cooling and heating source devices 110 of different types, in a specific embodiment, the step S211 of determining the set values of the outlet water temperatures of the cooling and heating source devices 110 according to the analysis results and the energy saving conditions, and performing the energy saving control on the cooling and heating source devices 110 according to the set values of the outlet water temperatures of the cooling and heating source devices 110, further includes the following steps:
when the cold and heat source device 110 is a water chiller, a water-ground source heat pump or an air source heat pump, determining an operation mode of the cold and heat source device 110;
when the operation mode of the cold and heat source device 110 is determined to be the cooling mode, determining that the adjustment step size is a positive value to increase the set value of the outlet water temperature of the cold and heat source device 110, and performing energy-saving control on the cold and heat source device 110 according to the updated set value of the outlet water temperature of the cold and heat source device 110;
when the operation mode of the cold and heat source device 110 is determined to be the heating mode, it is determined that the adjustment step size is a negative value, so as to reduce the set value of the outlet water temperature of the cold and heat source device 110, and perform energy saving control on the cold and heat source device 110 according to the updated set value of the outlet water temperature of the cold and heat source device 110.
For different cold and heat source devices 110, the specific energy saving control modes of the general energy saving control device 160 are different, and the energy saving effect of the cold and heat source devices 110 can be achieved.
Specifically, for the cold and heat source device 110 that has both the cooling mode and the heating mode, such as a chiller, a ground source heat pump, or an air source heat pump, when the cold and heat source device 110 is in the cooling mode and the heating mode, the directions of reducing the energy consumption of the cold and heat source device 110 are different.
Taking the water chilling unit as an example, when the water chilling unit is in a refrigeration mode, if the temperature and humidity at the tail end are judged to be within the set limit value, the set value of the outlet water temperature of the water chilling unit exists in the upward adjustment space (the direction of energy consumption reduction of the water chilling unit), and accordingly the direction of water temperature adjustment can be determined to be the upward adjustment water temperature. The direction of the magnitude change of the terminal load can be predicted by considering the change of weather data (environmental temperature), and the specific adjusting step can be determined by combining the terminal temperature margin. That is, the specific energy-saving control of the universal energy-saving control device 160 of the cold and heat source device 110 is based on the premise of meeting the end temperature and humidity target, and when the chiller is in the cooling mode and there is an adjustment space, the set value of the outlet water temperature of the chiller is increased, so as to reduce the energy consumption of the chiller.
Illustratively, when the operation mode of the water chilling unit is judged to be the cooling mode, the adjusting step is determined to be a positive value, the size of the adjusting step is assumed to be i delta T, wherein i is an adjusting parameter, i is 1, 2 and 3 … … n, n is a positive integer, delta T is a single step, and in one embodiment, delta T is 0.1 ℃, and the set value T of the outlet water temperature of the water chilling unit is combined with the allowance that the tail end temperature is lower than the set limit value1Original water temperature set value T0+ the size of the step size n Δ T. Wherein n of the adjusting step is determined by the variation trend of the terminal temperature margin and the terminal load quantity along with the time, and the terminal temperature margin and the terminal load quantity are determined at the terminalWhen the load quantity changes, the larger the end temperature margin is, the larger n is; when the terminal temperature margin is constant, n is larger as the terminal load amount changes. Finally, the set value of the outlet water temperature of the water chilling unit is improved, and the energy-saving effect is achieved.
When the water chilling unit is in a heating mode, if the temperature and humidity at the tail end are judged to be within the set limit value, a set value of the water outlet temperature of the water chilling unit exists in a down-regulation space (the direction of energy consumption reduction of the water chilling unit), and accordingly the direction of water temperature regulation can be determined to be the down-regulation water temperature. The direction of the magnitude change of the terminal load can be predicted by considering the change of weather data (environmental temperature), and the specific adjusting step can be determined by combining the terminal temperature margin. That is, the specific energy-saving control of the universal energy-saving control device 160 of the cold and heat source device 110 is based on the premise that the target of the terminal temperature and humidity is satisfied, and when the chiller is in the heating mode and there is an adjustment space, the set value of the outlet water temperature of the chiller is reduced, so that the energy consumption of the chiller is reduced.
Illustratively, when the operation mode of the water chilling unit is judged to be the heating mode, the adjusting step length is determined to be a negative value, and the set value of the outlet water temperature of the water chilling unit is equal to the size of the original outlet water temperature set value-the adjusting step length in combination with the allowance that the tail end temperature is lower than the set limit value. The size of the adjusting step length is determined by the change trend of the terminal temperature allowance and the terminal load along with the time, and finally the set value of the outlet water temperature of the water chilling unit is reduced to achieve the energy-saving effect.
Similarly, for other cold and heat source devices 110, the operation parameters of the cold and heat source devices 110 may be adjusted to achieve the purpose of energy saving. For example, under the condition of meeting the requirements of the terminal temperature and humidity, the water outlet temperature set value of the unit can be increased in the refrigeration mode and reduced in the heating mode for the ground source heat pump unit or the air source heat pump unit.
Further, in order to determine the set values of the outlet water temperatures of the cooling and heating source devices 110 of different types, in a specific embodiment, the step S211 of determining the set values of the outlet water temperatures of the cooling and heating source devices 110 according to the analysis results and the energy saving conditions, and performing the energy saving control on the cooling and heating source devices 110 according to the set values of the outlet water temperatures of the cooling and heating source devices 110, further includes the following steps:
when the cold and heat source device 110 is a direct-fired unit, an electric boiler, an electric heat storage boiler, a gas boiler or an oil boiler, the adjustment step length is determined to be a negative value to reduce the set value of the water outlet temperature of the cold and heat source device 110, and the cold and heat source device 110 is subjected to energy-saving control according to the updated set value of the water outlet temperature of the cold and heat source device 110.
For heat sources such as an electric boiler, an electric heat storage boiler, a gas boiler, and an oil-fired boiler, the energy consumption of the heat source equipment is decreased, and the set value of the outlet water temperature of the heat source equipment is decreased, so that the universal energy-saving control device 160 of the cold and heat source equipment 110 can achieve the energy-saving effect of the heat source equipment by decreasing the set value of the outlet water temperature of the heat source equipment.
In a third aspect.
The present invention provides an electronic device, including:
a processor, a memory, and a bus;
the bus is used for connecting the processor and the memory;
the memory is used for storing operation instructions;
the processor is used for calling the operation instruction, and the executable instruction enables the processor to execute the operation corresponding to the energy-saving control method of the central air-conditioning system shown in the second aspect of the application.
In an alternative embodiment, an electronic device is provided, as shown in fig. 3, the electronic device 5000 shown in fig. 3 includes: a processor 5001 and a memory 5003. The processor 5001 and the memory 5003 are coupled, such as via a bus 5002. Optionally, the electronic device 5000 may also include a transceiver 5004. It should be noted that the transceiver 5004 is not limited to one in practical application, and the structure of the electronic device 5000 is not limited to the embodiment of the present application.
The processor 5001 may be a CPU, general purpose processor, DSP, ASIC, FPGA or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor 5001 may also be a combination of processors implementing computing functionality, e.g., a combination comprising one or more microprocessors, a combination of DSPs and microprocessors, or the like.
Bus 5002 can include a path that conveys information between the aforementioned components. The bus 5002 may be a PCI bus or EISA bus, etc. The bus 5002 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 3, but this does not mean only one bus or one type of bus.
The memory 5003 may be, but is not limited to, a ROM or other type of static storage device that can store static information and instructions, a RAM or other type of dynamic storage device that can store information and instructions, an EEPROM, a CD-ROM or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
The memory 5003 is used for storing application program codes for executing the present solution, and the execution is controlled by the processor 5001. The processor 5001 is configured to execute application program code stored in the memory 5003 to implement the teachings of any of the foregoing method embodiments.
Among them, electronic devices include but are not limited to: mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like.
A fourth aspect.
The present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements an energy saving control method of a central air conditioning system as set forth in the second aspect of the present application.

Claims (10)

1. A central air conditioning system, comprising: the system comprises cold and heat source equipment, tail end equipment, a tail end temperature and humidity sensor, a meteorological sensor, a cold and heat source equipment monitoring sensor and a universal energy-saving control device;
the universal energy-saving control device comprises a universal control unit, a data communication interface, an input interface for signal acquisition and an output interface for signal output, wherein the universal control unit is respectively connected with the data communication interface, the input interface and the output interface, the input interface is used for being respectively connected with the tail end temperature and humidity sensor, the meteorological sensor and the cold and heat source equipment monitoring sensor, the output interface is respectively connected with corresponding cold and heat source equipment, and the data communication interface is used for being universally connected with external intelligent control equipment;
the general control unit is used for acquiring and analyzing the running data and the set parameters of the cold and heat source equipment collected by the cold and heat source equipment monitoring sensor, the terminal temperature and humidity collected by the terminal temperature and humidity sensor and the weather data collected by the weather sensor, and then performing energy-saving control on the cold and heat source equipment according to the analysis result.
2. The central air conditioning system of claim 1, wherein the data communication interface comprises one or more of an RS-232 serial port, an RS-485 serial port, an ethernet, a USB interface, and a wireless interface.
3. The central air conditioning system of claim 1, wherein the protocols of the data communication interface include one or more of Modbus, BACnet, and Lonwork.
4. The central air-conditioning system according to claim 1, wherein the general control unit is further configured to perform energy saving control on the cold and heat source device according to the analysis result and the energy saving condition; the energy-saving conditions comprise that the temperature and the humidity at the tail end do not exceed a set limit value and the energy consumption of cold and heat source equipment meets a minimization principle.
5. The central air conditioning system of claim 4, wherein the general purpose control unit is further configured to:
when the cold and heat source equipment is a water chilling unit, a water-ground source heat pump unit or an air source heat pump unit, judging the operation mode of the cold and heat source equipment;
when the operation mode of the cold and heat source equipment is judged to be a refrigeration mode, determining that the adjustment step length is a positive value so as to improve the outlet water temperature set value of the cold and heat source equipment, and performing energy-saving control on the cold and heat source equipment according to the updated outlet water temperature set value of the cold and heat source equipment;
and when the operation mode of the cold and heat source equipment is judged to be a heating mode, determining that the adjusting step length is a negative value so as to reduce the set value of the outlet water temperature of the cold and heat source equipment, and performing energy-saving control on the cold and heat source equipment according to the updated set value of the outlet water temperature of the cold and heat source equipment.
6. The central air conditioning system of claim 5, wherein the general purpose control unit is further configured to:
and when the cold and heat source equipment is a direct-fired unit, an electric boiler, an electric heat storage boiler, a gas boiler or an oil boiler, determining that the adjusting step length is a negative value so as to reduce the set value of the outlet water temperature of the cold and heat source equipment, and performing energy-saving control on the cold and heat source equipment according to the updated set value of the outlet water temperature of the cold and heat source equipment.
7. An energy-saving control method of a central air-conditioning system, applied to the central air-conditioning system according to any one of claims 1 to 6, the energy-saving control method comprising:
acquiring and analyzing the operation data and the set parameters of the cold and heat source equipment, and the terminal temperature and humidity and weather data;
and performing energy-saving control on the cold and heat source equipment according to the analysis result.
8. The energy-saving control method of a central air-conditioning system as claimed in claim 7, wherein the energy-saving control of the cold and heat source device according to the analysis result comprises:
performing energy-saving control on the cold and heat source equipment according to the analysis result and the energy-saving condition; the energy-saving conditions comprise that the temperature and the humidity at the tail end do not exceed a set limit value and the energy consumption of cold and heat source equipment meets a minimization principle.
9. The energy-saving control method of a central air-conditioning system as claimed in claim 8, wherein the energy-saving control of the cold-heat source device based on the analysis result and the energy-saving condition comprises:
when the cold and heat source equipment is a water chilling unit, a water-ground source heat pump unit or an air source heat pump unit, judging the operation mode of the cold and heat source equipment; when the operation mode of the cold and heat source equipment is judged to be a refrigeration mode, determining that the adjusting step length is a positive value so as to improve the outlet water temperature set value of the cold and heat source equipment, and performing energy-saving control on the cold and heat source equipment according to the updated outlet water temperature set value of the cold and heat source equipment; when the operation mode of the cold and heat source equipment is judged to be a heating mode, determining that the adjusting step length is a negative value so as to reduce the set value of the outlet water temperature of the cold and heat source equipment, and performing energy-saving control on the cold and heat source equipment according to the updated set value of the outlet water temperature of the cold and heat source equipment;
and when the cold and heat source equipment is a direct-fired unit, an electric boiler, an electric heat storage boiler, a gas boiler or an oil boiler, determining that the adjusting step length is a negative value so as to reduce the set value of the outlet water temperature of the cold and heat source equipment, and performing energy-saving control on the cold and heat source equipment according to the updated set value of the outlet water temperature of the cold and heat source equipment.
10. A computer-readable storage medium having stored thereon a computer program, wherein the program, when executed by a processor, implements a method of energy saving control of a central air conditioning system according to any one of claims 7 to 9.
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