CN116294087A - Energy-saving control method and system for intelligent building - Google Patents
Energy-saving control method and system for intelligent building Download PDFInfo
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- CN116294087A CN116294087A CN202310476479.5A CN202310476479A CN116294087A CN 116294087 A CN116294087 A CN 116294087A CN 202310476479 A CN202310476479 A CN 202310476479A CN 116294087 A CN116294087 A CN 116294087A
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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
- F24F11/62—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
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/30—Velocity
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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
- F24F2120/00—Control inputs relating to users or occupants
- F24F2120/10—Occupancy
- F24F2120/14—Activity of occupants
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
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- 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
Abstract
The invention relates to the technical field of building energy conservation, and particularly discloses an energy conservation control method and system for an intelligent building, wherein the method comprises the following steps: s1, acquiring the temperature in each room, the number of users and the temperature outside the room; s2, obtaining heat exchange power required by each room according to the temperature, the number of users, the area and the set temperature inside and outside the room; s3, obtaining heat exchange power required by the whole building according to the heat exchange power required by all rooms, and predictively controlling the cold and heat sources of a central air conditioner in the building; the invention acquires the temperature inside and outside the room and the number of users to obtain the heat exchange power function required by the room, and obtains the heat exchange power function required by the whole building, so as to predictively adjust the cold and heat sources of the central air conditioner, eliminate the hysteresis of the adjustment of the cold and heat sources of the central air conditioner, reduce the waste of the output power of the cold and heat sources of the central air conditioner, and further achieve the aim of intelligent building energy-saving control.
Description
Technical Field
The invention relates to the technical field of building energy conservation, in particular to an energy conservation control method and system for an intelligent building.
Background
Along with popularization of the Internet of things, the traditional building starts to rapidly transform to an intelligent building, and one of the characteristics of the intelligent building is that a plurality of types of sensors are widely deployed in a building space, and transmission of sensing data is realized through the Internet of things, so that on the basis of intelligent analysis of the sensing data, regulation and control of automatic, accurate and predictive internal facilities of the building are realized.
The existing multi-functional office buildings, large commercial complexes and other buildings are all provided with a central air conditioning system, the addition of the central air conditioning system can improve the office efficiency and comfort level of users, and in order to ensure the comfort level and energy conservation of users in each room, the cold and heat source system of the central air conditioner is regulated in real time according to the data acquired by the sensors in each room.
In the central air conditioning system, the cold and heat source media comprise cold water and hot water, the conveying mode mainly comprises a water pipe and an air pipe, and different hysteresis phenomena, such as hysteresis of the cold water, can be generated in the conveying process of the cold and heat source media of the central air conditioner due to the different properties of the media and the different conveying modes: in a central air-conditioning cold water system, when water is conveyed from a cooling tower to an end user through a water supply pipeline, hysteresis is generated due to the influences of the length, the water flow and the like of the pipeline, and in general, when the temperature difference between the cooling water and the indoor temperature is large, the hysteresis is obvious; hysteresis of hot water: in a central air-conditioning hot water system, when water is conveyed from a heat source to an end user through a heat supply pipeline, hysteresis is generated due to the influences of the length of the pipeline, the water flow and the like, and generally, when the heating requirement is large, the difference between the temperature of hot water and the indoor temperature is large, and the hysteresis is more obvious; hysteresis of the air duct: in a central air conditioning system, a cold and hot source sends air into a room through an air processor, and certain hysteresis is generated in indoor temperature control, so that factors such as air temperature change, conveying heating and the like are generally considered; the generation of the medium hysteresis of the cold and heat sources of the central air conditioner can influence the indoor temperature control on one hand, influence the comfort level of users, and can also influence the energy consumption to a certain extent on the other hand, thereby causing a certain degree of waste.
Disclosure of Invention
The invention aims to provide an energy-saving control method and system for an intelligent building, which solve the following technical problems:
how to predictively regulate the output power of the cold and heat source system of the central air conditioner according to the heat exchange requirements in each room.
The aim of the invention can be achieved by the following technical scheme:
an energy-saving control method of an intelligent building, the method comprising:
s1, acquiring the temperature in each room, the number of users and the temperature outside the room;
s2, obtaining heat exchange power required by each room according to the temperature, the number of users, the area and the set temperature inside and outside the room;
s3, obtaining heat exchange power required by the whole building according to the heat exchange power required by all rooms, and predictively controlling the cold and heat sources of the central air conditioner in the building.
In one embodiment, the heat exchange demand coefficient M of the room i (t)＝f(T o ，T s ，T h )*S i +N x *C x ；
Wherein f (T) o ，T s ，T h ) As a function of the change in room temperature per unit volume, said T o At the outdoor temperature, T s Is the indoor temperature, T h Is a preset comfortable temperature of human body, the S i For the indoor volume of the room, the N is x As the number of people in the room, the C x Is the influence coefficient of human body on indoor temperature.
Further, the heat exchange demand power P of the room i (t)＝M i (t)*R；
Wherein R is the corresponding coefficient of indoor heat exchange demand power.
Further, the total heat exchange required by the buildingPower of
Wherein, Q is the number of rooms of the building, i E [1, Q]，P i And (t) is the heat exchange power required by the ith room.
Further, the cold and heat source output power P of the central air conditioner in the building A ＝P sum (t+Δt)。
Further, the method further comprises:
s4, wind speed V of air outlet of fan coil air outlet device in each room w Flow velocity V of heat exchange medium in fan coil f Collecting;
actual heat exchange power P of fan coil air outlet pipe device r (t)＝V w *V f *C h ；
Wherein the C h Is the heat exchange coefficient of the fan coil.
Further, the process of step S4 further includes:
heat exchange demand power P for room i (t) and the actual Heat exchange Power P r (t) performing an alignment;
if P i (t)＝P r (t) the fan coil air-out device in the room works normally;
if P i (t)≠P r And (t), if the fan coil air outlet device in the room fails, giving an early warning.
An energy-saving control system for an intelligent building, the system comprising:
the temperature information acquisition module is used for monitoring and acquiring the temperature inside and outside the room;
the people number monitoring module is used for monitoring and collecting the number of people in the room;
the flow speed monitoring module is used for monitoring and collecting the wind speed at the air outlet of the fan coil air outlet device and the flow speed of the heat exchange medium in the fan coil;
the analysis module is used for analyzing and calculating the heat exchange demand power of the room;
the control module is used for controlling the cold and heat source output power of the central air conditioner in the building;
and the early warning module is used for early warning when the fan coil air outlet device in the room fails.
The invention has the beneficial effects that:
(1) The invention acquires the temperature inside and outside the room and the number of users, obtains the heat exchange demand coefficient function of the room through the function of the temperature change of the room in the unit volume of the room and the influence coefficient of the human body on the indoor temperature, thereby obtaining the heat exchange power function required by the room, integrating the heat exchange power functions required by each room in the building, obtaining the heat exchange power function required by the whole building, then obtaining the heat exchange power required by the whole building after delta t time, further predictively adjusting the cold and heat sources of the central air conditioner, eliminating the hysteresis of the process of outputting the heat exchange medium to flow into the fan coil pipes in each room after the cold and heat sources of the central air conditioner are adjusted, ensuring the comfort level of the users, simultaneously reducing the waste of the output power of the cold and heat sources of the central air conditioner to the greatest extent, and achieving the purpose of intelligent building energy-saving control.
(2) According to the invention, the wind speed at the air outlet of the fan coil air outlet device and the flow speed of the heat exchange medium in the fan coil are monitored and collected through the flow speed monitoring module to analyze, so that the actual heat exchange power function in each room is obtained, compared with the obtained room demand power function, if the actual heat exchange power function in a certain room is the same as the demand power function, the fan coil air outlet device in the room is indicated to normally operate, if the actual heat exchange power function in a certain room is different from the demand power function, the fan coil air outlet device in the room is indicated to be out of order, the early warning module gives an early warning, and staff is required to inspect and maintain the fan coil air outlet device in the room.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a flow chart of the steps of the energy saving control method of the intelligent building of the present invention;
FIG. 2 is a schematic block diagram of the energy saving control system of the intelligent building of the present invention;
fig. 3 is a flowchart of the power output required after the energy-saving control method of the intelligent building obtains the Δt time of the cold and heat source of the central air conditioner.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, in one embodiment, there is provided an energy saving control method for an intelligent building, the method including:
s1, acquiring the temperature in each room, the number of users and the temperature outside the room;
s2, obtaining heat exchange power required by each room according to the temperature, the number of users, the area and the set temperature inside and outside the room;
s3, obtaining heat exchange power required by the whole building according to the heat exchange power required by all rooms, and predictively controlling the cold and heat sources of the central air conditioner in the building.
Through the technical scheme, the temperature in a single room, the number of users and the temperature outside the room are collected, the heat exchange demand power in the process of controlling and changing the temperature of the room to the set temperature is obtained according to the set temperature of the room by the central air conditioner, then the total power value required by all rooms in the building is obtained, and the central air conditioner cold and heat sources in the building are reversely controlled to carry out predictive heat exchange power output, so that the comfort degree of each room can be guaranteed to be adjusted, the accurate predictive adjustment of the heat exchange output power of the central air conditioner cold and heat sources can be also carried out, the waste of the heat exchange output power of the central air conditioner cold and heat sources is avoided, and the energy is saved.
As one embodiment of the invention, the heat exchange demand coefficient M of the room i (t)＝f(T o ，T s ，T h )*S i +N x *C x ；
Wherein f (T) o ，T s ，T h ) As a function of the change in room temperature per unit volume, said T o At the outdoor temperature, T s Is the indoor temperature, T h Is a preset comfortable temperature of human body, the S i For the indoor volume of the room, the N is x As the number of people in the room, the C x Is the influence coefficient of human body on indoor temperature.
Through the above technical solution, the present embodiment provides a method for obtaining a heat exchange coefficient required in a room, where f is a function of a temperature change in a unit volume of the room, and an outdoor temperature T o Indoor temperature T s Preset human body comfort temperature T h The method can be used for obtaining a corresponding function by fitting and modeling according to the collected internal and external temperatures of the building and the preset comfortable temperature of the human body o -T h The larger the i, the heat exchange coefficient M of the room requirement i The larger is |T s -T h The larger the i, the heat exchange coefficient M of the room requirement i The larger S i The larger the volume space in the room is, the heat exchange coefficient M of the room needs i The larger N x The number of people in the room can be obtained according to the collected number of the users, and the more the number of the people in the room is, the heat exchange coefficient M of the room is required i The larger C x The influence coefficient of human body on indoor temperature can be obtained according to the influence fitting function of user number change on indoor temperature.
Further, the heat exchange demand power P of the room i (t)＝M i (t)*R；
The R is a corresponding coefficient of indoor heat exchange demand power, and can be obtained by fitting the heat exchange demand power converted into corresponding energy-saving comfortable heat exchange demand power according to the heat exchange coefficient;
further, the total heat exchange power required by the building
Wherein, Q is the number of rooms of the building, i E [1, Q]，P i And (t) is the heat exchange power required by the ith room.
Through the technical scheme, the method for obtaining the heat exchange power required by adjusting the temperature of all the rooms in the building is provided, and particularly, the corresponding heat exchange demand power function in the rooms is obtained through the heat exchange coefficient function, and the heat exchange demand power functions of all the rooms are integrated, so that the total heat exchange power function required by the building is obtained.
Further, the cold and heat source output power P of the central air conditioner in the building A ＝P sum (t+Δt)。
Through the technical scheme, the time point of t+delta t is brought into the obtained total heat exchange power function required by the building, so that the power required to be output by the cold and heat sources of the central air conditioner in the building after delta t time is obtained, wherein t is real-time, delta t is time required by the heat exchange medium output by the cold and heat sources of the central air conditioner to flow into the fan coils in each room, thus predictively adjusting the cold and heat sources of the central air conditioner, eliminating the hysteresis of the heat exchange medium output by the central air conditioner in the process of flowing into the fan coils in each room after the cold and heat sources of the central air conditioner are adjusted, reducing the output power waste caused by the hysteresis of the output power of the cold and heat sources of the central air conditioner to the greatest extent, adjusting the input heat exchange power of each room in real time, and guaranteeing the comfort of users, thereby achieving the purpose of intelligent building energy saving control.
Further, the method further comprises:
s4, wind speed V of air outlet of fan coil air outlet device in each room w Flow velocity V of heat exchange medium in fan coil f Collecting;
actual heat exchange power P of fan coil air outlet pipe device r (t)＝V w *V f *C h ；
Wherein the C h The heat exchange coefficient of the fan coil can be obtained according to the actual cooling effect of the fan coil.
Through the technical scheme, the wind speed of the air outlet of the fan coil air outlet device in each room in the building and the flow speed of the heat exchange medium in the fan coil are collected, and the actual heat exchange power function of each fan coil air outlet device is obtained by combining the heat exchange coefficient of the fan coil, so that the state of each fan coil can be analyzed conveniently.
Further, the process of step S4 further includes:
heat exchange demand power P for room i (t) and the actual Heat exchange Power P r (t) performing an alignment;
if P i (t)＝P r (t) the fan coil air-out device in the room works normally;
if P i (t)≠P r And (t), if the fan coil air outlet device in the room fails, giving an early warning.
Through the above technical scheme, the present embodiment provides a method for early warning of a working state of a fan coil in a room, specifically, through the obtained actual heat exchange power function P of an air outlet device of the fan coil i (t) heat exchange demand power function P with room r (t) alignment, if P i (t)＝P r (t) if the fan coil air-out device in the room is in a normal working state, if P i (t)≠P r And (t) if the fan coil air outlet device in the room fails, giving out early warning and requiring detection and repair by staff.
Referring to fig. 2 of the drawings, the present embodiment provides an energy-saving control system for an intelligent building, the system includes:
the temperature information acquisition module is used for monitoring and acquiring the temperature inside and outside the room;
the people number monitoring module is used for monitoring and collecting the number of people in the room;
the flow speed monitoring module is used for monitoring and collecting the wind speed at the air outlet of the fan coil air outlet device and the flow speed of the heat exchange medium in the fan coil;
the analysis module is used for analyzing and calculating the heat exchange demand power of the room;
the control module is used for controlling the cold and heat source output power of the central air conditioner in the building;
and the early warning module is used for early warning when the fan coil air outlet device in the room fails.
According to the technical scheme, the indoor and outdoor temperatures, the number of users and other numerical values are acquired in real time according to the temperature information acquisition module and the people monitoring module, the heat exchange demand coefficient in the corresponding room is obtained through the analysis module, the heat exchange power functions required by all rooms are obtained, the total required heat exchange power function of the building is obtained, the power required to be output by the central air conditioner cold and heat source after delta t time is obtained according to the total required heat exchange power function of the building, and accordingly the central air conditioner cold and heat source is predictively adjusted, hysteresis in the process that the heat exchange medium flows into fan coils in each room after the central air conditioner cold and heat source is adjusted is eliminated, the comfort level of each room user in the building is ensured, meanwhile, waste of the output power of a cold and heat source system of the central air conditioner is reduced to the greatest extent, energy is saved, in the process, the analysis module also continuously analyzes the wind speed at the air outlet of the fan coil air outlet device acquired by the flow rate monitoring module and the flow rate of the heat exchange medium in the fan coil, the actual heat exchange power function in each room is obtained, compared with the obtained room demand power function, if the actual heat exchange function in a certain room is identical with the demand function in the room, if the fan coil is different from the room power device is required to be normally operated, and if the fan power in the room is not normally required to be normally detected, and the fan power is required to be normally required to be detected, and the fan device is normally required to be normally operated, and the device is required to be normally.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (8)
1. An energy-saving control method for an intelligent building, which is characterized by comprising the following steps:
s1, acquiring the temperature in each room, the number of users and the temperature outside the room;
s2, obtaining heat exchange power required by each room according to the temperature, the number of users, the area and the set temperature inside and outside the room;
s3, obtaining heat exchange power required by the whole building according to the heat exchange power required by all rooms, and predictively controlling the cold and heat sources of the central air conditioner in the building.
2. The energy saving control method of intelligent building according to claim 1, wherein the heat exchange demand coefficient M of the room i (t)＝f(T o ，T s ，T h )*S i +N x *C x ；
Wherein f (T) o ，T s ，T h ) As a function of the change in room temperature per unit volume, said T o At the outdoor temperature, T s Is the indoor temperature, T h Is a preset comfortable temperature of human body, the S i For the indoor volume of the room, the N is x As the number of people in the room, the C x Is the influence coefficient of human body on indoor temperature.
3. The energy saving control method of intelligent building according to claim 2, wherein the heat exchange demand power P of the room i (t)＝M i (t)*R；
Wherein R is the corresponding coefficient of indoor heat exchange demand power.
4. A method of energy saving control for intelligent buildings according to claim 3, wherein the total heat exchange power required by the building
Wherein the saidQ is the number of rooms of the building, i E [1, Q]，P i And (t) is the heat exchange power required by the ith room.
5. The energy-saving control method for intelligent building according to claim 4, wherein the output power P of cold and heat source of central air conditioner in building A ＝P sum (t+Δt)。
6. The energy saving control method of an intelligent building according to claim 5, further comprising:
s4, wind speed V of air outlet of fan coil air outlet device in each room w Flow velocity V of heat exchange medium in fan coil f Collecting;
actual heat exchange power P of fan coil air outlet pipe device r (t)＝V w *V f *C h ；
Wherein the C h Is the heat exchange coefficient of the fan coil.
7. The energy saving control method of intelligent building according to claim 6, wherein the process of step S4 further comprises:
heat exchange demand power P for room i (t) and the actual Heat exchange Power P r (t) performing an alignment;
if P i (t)＝P r (t) the fan coil air-out device in the room works normally;
if P i (t)≠P r And (t), if the fan coil air outlet device in the room fails, giving an early warning.
8. An energy-saving control system for an intelligent building, the system comprising:
the temperature information acquisition module is used for monitoring and acquiring the temperature inside and outside the room;
the people number monitoring module is used for monitoring and collecting the number of people in the room;
the flow speed monitoring module is used for monitoring and collecting the wind speed at the air outlet of the fan coil air outlet device and the flow speed of the heat exchange medium in the fan coil;
the analysis module is used for analyzing and calculating the heat exchange demand power of the room;
the control module is used for controlling the cold and heat source output power of the central air conditioner in the building;
and the early warning module is used for early warning when the fan coil air outlet device in the room fails.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117490185A (en) * | 2023-12-29 | 2024-02-02 | 天津英泰华机电技术有限公司 | Intelligent central air conditioner control system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117490185A (en) * | 2023-12-29 | 2024-02-02 | 天津英泰华机电技术有限公司 | Intelligent central air conditioner control system and method |
| CN117490185B (en) * | 2023-12-29 | 2024-03-22 | 天津英泰华机电技术有限公司 | Intelligent central air conditioner control system and method |
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