CN115307289A - Subway fresh air control method, device, equipment and medium based on adjusting air valve - Google Patents

Subway fresh air control method, device, equipment and medium based on adjusting air valve Download PDF

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Publication number
CN115307289A
CN115307289A CN202210942534.0A CN202210942534A CN115307289A CN 115307289 A CN115307289 A CN 115307289A CN 202210942534 A CN202210942534 A CN 202210942534A CN 115307289 A CN115307289 A CN 115307289A
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fresh air
time
actual
air volume
station
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李晓锋
杨卓
吴曈凌
陈娜
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Tsinghua University
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Tsinghua University
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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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • 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
    • F24F11/62—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
    • F24F2120/00—Control inputs relating to users or occupants
    • F24F2120/10—Occupancy
    • 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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  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
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  • Fluid Mechanics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The application discloses subway fresh air control method, device, equipment and medium based on adjusting air valves, wherein the method comprises the following steps: acquiring the hourly fresh air volume required by the subway station; calculating actual power according to actual voltage and current of the small fresh air machine of the station; based on the power-air volume characteristic curve of the small new fan, the one-to-one correspondence between the actual power and the actual fresh air volume of the fan with a single peak or double peaks of the characteristic curve is realized through a specific algorithm, and the opening degree of an air valve of the small new fan is gradually adjusted until the actual air volume of the small new fan reaches the hourly fresh air volume. The embodiment of the application utilizes the subway original equipment to monitor the current of the small fresh air fan, obtains the actual fresh air volume through a specific algorithm, and controls the fresh air valve, so that the accurate adjustment of the fresh air volume is realized, and the fresh air volume is matched with the fresh air volume required by the actual hourly passenger flow. Meanwhile, unnecessary fresh air load is reduced, and energy consumption and frequency converter cost are saved. Therefore, the problems that the related technology is difficult to accurately adjust the fresh air volume, the cost is high and the like are solved.

Description

Subway fresh air control method, device, equipment and medium based on adjusting air valve
Technical Field
The application relates to the technical field of subway air conditioner control, in particular to a subway fresh air control method, device, equipment and medium based on an adjusting air valve.
Background
An air conditioning system of a current subway station generally adopts a system of coupling three fans including an air conditioning box blower, a return exhaust fan and a small fresh air fan. Under little new trend operating mode, forced draught blower, return exhaust fan, little new trend fan are opened simultaneously: the air feeder and the air return exhaust fan are variable frequency fans and are subjected to variable frequency regulation according to indoor load; and the small new fan is a fixed-frequency fan and provides a fixed fresh air volume. The fresh air volume of the small fresh air fan is usually designed according to the peak passenger flow volume, so that excessive fresh air exists in the low peak passenger flow, and the energy consumption of the air conditioner is wasted. Therefore, the fresh air volume needs to be adjusted in real time to meet the requirement of passenger flow change. In a conventional design scheme, a fresh air valve is arranged on a fresh air pipeline and only used as a switch for control, and the fresh air quantity cannot be adjusted.
Related art mainly has two kinds of solutions for adjusting the fresh air volume, firstly adjusts through the blast gate, and accurate air volume control needs add one set of new trend volume measurement or wind pressure measuring device alone, otherwise because the linearity that the blast gate was adjusted is extremely poor, can't the accurate fresh air volume of adjusting. And secondly, the fresh air quantity is adjusted through the frequency conversion of the fresh air fan.
However, the air-conditioning fans of the subway station are all brought into intelligent low voltage, and interfaces exist among multiple systems such as an AFC system, a BAS system and a comprehensive monitoring system, so that in the related art, when the corresponding small new fan frequency conversion control is additionally arranged in the station, great difficulty exists, and more cost is generated. In addition, due to the design of three-fan coupling, the positive/negative pressure of the air mixing chamber can also influence the actual fresh air volume, and is difficult to accurately adjust during frequency conversion control, so that urgent solution is needed.
Disclosure of Invention
The application provides a subway fresh air control method, device, equipment and medium based on an adjusting air valve, and aims to solve the problems that the related technology is difficult to accurately adjust fresh air volume, the cost is high and the like.
An embodiment of the first aspect of the application provides a subway fresh air control method based on an adjusting air valve, which comprises the following steps: acquiring the time-by-time fresh air quantity required by the subway station through the time-by-time passenger flow; calculating actual power according to the actual voltage and the actual current of the small fresh air machine of the subway station; and realizing the one-to-one correspondence of the actual power and the actual fresh air volume of the fan with a single peak or double peaks of the characteristic curve through a preset algorithm based on the power-air volume characteristic curve of the small fresh air fan so as to gradually adjust the opening of an air valve of the small fresh air fan until the actual air volume of the small fresh air fan reaches the hourly fresh air volume.
Optionally, in an embodiment of the present application, the acquiring a hourly fresh air volume of a subway station includes: acquiring the hourly inbound passenger flow volume and the hourly outbound passenger flow volume of the subway station; and calculating the hourly fresh air volume according to the hourly incoming passenger flow volume, the hourly outgoing passenger flow volume and the average residence time of personnel.
Optionally, in an embodiment of the present application, a calculation formula of the hourly new air volume is:
Q x ＝q 0 ·(n hall +n platform )，
Figure BDA0003786286730000021
Figure BDA0003786286730000022
wherein Q is x The required fresh air volume by time is expressed in m 3 /h；q 0 The new air quantity required by a single person is expressed in the unit of m 3 /h；n hall 、n platform Respectively representing the equivalent number of people in the time-by-time station hall and the station; a. The in 、A out Respectively representing the number of people who get in and out of the station by time, and the unit is people/h; a is a 1 、a 2 Respectively representing the average time of passengers staying in a station hall and a station platform when the passengers get in the station, wherein the unit is min; b is a mixture of 1 、b 2 Respectively represents the average time of passengers staying in a station hall and a station platform when the passengers leave the station, and the unit is min.
Optionally, in an embodiment of the present application, the one-to-one correspondence between the actual power and the actual fresh air volume of the fan with a single peak or double peaks of the characteristic curve is realized through a preset algorithm based on the power-air volume characteristic curve of the small new fan, so as to gradually adjust the opening of the air valve of the small new fan until the actual air volume of the small new fan reaches the time-by-time fresh air volume, where the method includes: setting initial measured power N1 and corresponding opening k1 of the small fresh air valve based on that any one point on the characteristic curve of the power N-air quantity Q of the small fresh air fan is represented as (Q, N, N '), and N' is the partial derivative of the point (Q, N); adjusting the opening k1 to an opening k2, measuring power N2, and obtaining a corresponding point (Q2 a, N2, N2a ') or (Q2 b, N2, N2 b'), calculating N2'= (N2-N1)/(k 2-k 1), wherein if N2' is in the same direction as N2a ', the corresponding point is (Q2 a, N2, N2 a'), so as to obtain a corresponding actual fresh air volume Q when the opening of the regulating valve is the opening k; and comparing the actual fresh air quantity Q with the required hourly fresh air quantity Qx.
Optionally, in an embodiment of the present application, the preset strategy is to obtain a corresponding actual current I every time the valve is adjusted, and obtain an average current I within a preset time duration, where the average current I is read every preset period.
The embodiment of the second aspect of this application provides a subway new trend controlling means based on adjust blast gate, includes: the acquisition module is used for acquiring the hourly fresh air volume required by the subway station through the hourly passenger flow; the calculation module is used for calculating actual power according to the actual voltage and the actual current of the small and new fan of the subway station; and the adjusting module is used for realizing the one-to-one correspondence between the actual power and the actual fresh air volume of the fan with a single peak or double peaks of the characteristic curve through a preset algorithm based on the power-air volume characteristic curve of the small new fan so as to gradually adjust the opening of the air valve of the small new fan until the actual air volume of the small new fan reaches the time-by-time fresh air volume.
Optionally, in an embodiment of the present application, the obtaining module includes: the passenger flow acquiring unit is used for acquiring the hourly inbound passenger flow and the hourly outbound passenger flow of the subway station; and the fresh air volume calculating unit is used for calculating the hourly fresh air volume according to the hourly inbound passenger flow volume, the hourly outbound passenger flow volume and the average personnel residence time.
Optionally, in an embodiment of the present application, a calculation formula of the hourly new air volume is:
Q x ＝q 0 ·(n hall +n platform )，
Figure BDA0003786286730000031
Figure BDA0003786286730000032
wherein Q is x The required fresh air volume by time is expressed in m 3 /h；q 0 The new air quantity required by a single person is expressed in the unit of m 3 /h；n hall 、n platform Respectively representing the equivalent number of people in the time-by-time station hall and the station; a. The in 、A out Respectively representing the number of people who get in and out of the station by time, and the unit is people/h; a is 1 、a 2 Respectively representing the average time of passengers staying in a station hall and a station platform respectively when the passengers get in the station, wherein the unit is min; b 1 、b 2 Respectively represents the average time of passengers staying in a station hall and a station platform when the passengers leave the station, and the unit is min.
Optionally, in an embodiment of the present application, the adjusting module includes: the setting unit is used for setting an initial measured power N1 and an opening k1 of a corresponding small fresh air valve based on the fact that any point on a power N-air volume Q characteristic curve of the small fresh air fan is represented as (Q, N, N '), and N' is a partial derivative of the point (Q, N); an adjusting unit, configured to adjust the opening k1 to an opening k2, measure a power N2, and obtain a corresponding point (Q2 a, N2a ') or (Q2 b, N2 b'), and calculate N2'= (N2-N1)/(k 2-k 1), where if N2' is in the same direction as N2a ', the corresponding point is (Q2 a, N2 a'), so as to obtain a corresponding actual fresh air volume Q when the opening of the adjusting valve is the opening k; and the comparison unit is used for comparing the actual fresh air quantity Q with the required hourly fresh air quantity Qx.
Optionally, in an embodiment of the application, the preset strategy is to obtain a corresponding actual current I each time the valve is adjusted, and take an average current I within a preset time duration, where the average current I is read every preset period.
An embodiment of a third aspect of the present application provides an electronic device, including: the subway fresh air control method based on the adjusting air valves comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein the processor executes the program to realize the subway fresh air control method based on the adjusting air valves.
An embodiment of a fourth aspect of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and the program is executed by a processor to implement the above subway fresh air control method based on adjusting an air valve.
Therefore, the application has the following beneficial effects:
the embodiment of the application can acquire the hourly fresh air volume of the subway station; calculating actual power according to actual voltage and actual current of a small fresh air fan of the subway station; and based on the power-air volume characteristic curve of the small new fan, realizing the one-to-one correspondence between the actual power and the actual fresh air volume of the fan with a single peak or double peaks of the characteristic curve through a specific algorithm, thereby realizing the gradual adjustment of the opening degree of the air valve of the small new fan until the actual air volume of the small new fan accurately reaches the hourly fresh air volume. The embodiment of the application utilizes the original equipment of the subway to monitor the current of the small fresh air fan to obtain the actual fresh air volume, and the fresh air valve is controlled, so that the accurate adjustment of the fresh air volume is realized, and the fresh air volume is matched with the fresh air volume required by the actual hourly passenger flow. Meanwhile, unnecessary fresh air load is reduced, and energy consumption and the cost of the frequency converter are saved. Therefore, the problems that the related technology is difficult to accurately adjust the fresh air volume, the cost is high and the like are solved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a subway fresh air control method based on an adjusting air valve according to an embodiment of the application;
FIG. 2 is a schematic illustration of an air conditioning system for a subway station according to an embodiment of the present application;
fig. 3 is a schematic diagram of execution logic of a subway fresh air control method based on an adjusting air valve according to an embodiment of the present application;
fig. 4 is an exemplary diagram of a subway fresh air control device based on an adjusting air valve according to an embodiment of the application;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Description of the reference numerals:
a subway fresh air control device-10 based on an adjusting air valve; the device comprises an acquisition module-100, a calculation module-200 and an adjustment module-300; memory-501, processor-502, communication interface-503.
Detailed Description
Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present application and should not be construed as limiting the present application.
The subway fresh air control method, device, equipment and medium based on the adjusting air valve in the embodiment of the application are described below with reference to the attached drawings. In order to solve the problems mentioned in the background technology, the application provides a subway fresh air control method based on an adjusting air valve, and in the method, the time-by-time fresh air quantity required by a subway station is obtained through time-by-time passenger flow; calculating actual power according to actual voltage and actual current of a small fresh air fan of the subway station; and realizing the one-to-one correspondence between the actual power and the actual fresh air volume of the fan with a single peak or double peaks of the characteristic curve through a preset algorithm based on the power-air volume characteristic curve of the small fresh air fan so as to gradually adjust the opening of an air valve of the small fresh air fan until the actual air volume of the small fresh air fan accurately reaches the hourly fresh air volume. According to the embodiment of the application, the current of the small fresh air fan is monitored by utilizing original equipment of the subway to obtain the actual fresh air volume, and the fresh air valve is controlled, so that the fresh air volume is accurately adjusted, and the fresh air volume is matched with the fresh air volume required by actual hourly passenger flow. Meanwhile, unnecessary fresh air load is reduced, and energy consumption and the cost of the frequency converter are saved. Therefore, the problems that the related technology is difficult to accurately adjust the fresh air volume, the cost is high and the like are solved.
Specifically, fig. 1 is a flowchart of a subway fresh air control method based on an adjusting air valve provided in an embodiment of the present application.
As shown in fig. 1, the subway fresh air control method based on the adjusting air valve comprises the following steps:
in step S101, a hourly new air volume required for the subway station is acquired by the hourly passenger flow.
As can be understood by those skilled in the art, in an air conditioning system of a subway station, the fresh air volume of a small fresh air fan is usually designed according to the peak passenger flow volume, so that excessive fresh air exists at the time of low peak of passenger flow, which results in waste of energy consumption of an air conditioner. Therefore, the method and the device can firstly acquire the hourly fresh air volume of the subway station as the target fresh air volume required by the hourly passenger flow, thereby providing reliable contrast data for subsequent adjustment of actual fresh air volume, adjusting the opening of the small fresh air valve, realizing accurate adjustment of fresh air volume, and enabling the fresh air volume to be matched with the fresh air volume required by the actual hourly passenger flow.
Optionally, in an embodiment of the present application, acquiring a hourly fresh air volume of a subway station includes: acquiring the hourly inbound passenger flow volume and the hourly outbound passenger flow volume of the subway station; and calculating the hourly fresh air volume according to the hourly incoming passenger flow volume, the hourly outgoing passenger flow volume and the average personnel residence time.
Specifically, the embodiment of the application can acquire the hourly passenger flow volume data of the station from the passenger flow management system of the subway station, and calculate the required hourly fresh air volume Q according to the average residence time of personnel x Therefore, the time-by-time fresh air volume is obtained by fusing data information such as the time-by-time passenger flow volume and the average stay time of personnel, the accuracy of the time-by-time fresh air volume data is higher, and reliable data are provided for subsequent guidance of adjustment of the actual fresh air volume.
Optionally, in an embodiment of the present application, a calculation formula of the time-by-time fresh air volume is:
Q x ＝q 0 ·(n hall +n platform )，
Figure BDA0003786286730000051
Figure BDA0003786286730000052
wherein Q is x The required fresh air volume by time is expressed in m 3 /h；q 0 The new air quantity required by a single person is expressed in the unit of m 3 /h；n hall 、n platform Respectively representing the equivalent number of people in the time-by-time station hall and the station; a. The in 、A out Respectively representing the number of people who get on and get off the station time by time, and the unit is people/h; a is a 1 、a 2 Respectively representing the average time of passengers staying in a station hall and a station platform when the passengers get in the station, wherein the unit is min; b is a mixture of 1 、b 2 Respectively represents the average time of the passengers staying in the station hall and the station platform when the passengers leave the station, and the unit is min.
It should be noted that, in the embodiment of the present application, the required hourly fresh air volume Q is calculated according to the hourly passenger volume and the average staying time of the people, and by the following formula x 。
Q x ＝q 0 ·(n hall +n platform )
Figure BDA0003786286730000061
Figure BDA0003786286730000062
In the formula, Q x The unit is m for the required fresh air volume 3 /h；q 0 The fresh air quantity required by a single person is m 3 /h；n hall 、n platform The number of equivalent people of the time-by-time station hall and the station platform is respectively, and the unit is a person; a. The in 、A out The number of people who get in and get out of the station by time is respectively, and the unit is people/h; a is a 1 、a 2 The average time of passengers staying in a station hall and a station platform respectively when the passengers get in the station is min; b 1 、b 2 The average time of the passengers staying in the station hall and the station platform respectively when the passengers leave the station is min.
It can be understood that the time-by-time fresh air volume is calculated by considering factors such as time-by-time passenger flow, the subsequent fresh air volume can be adjusted according to the time-by-time passenger flow, unnecessary fresh air load can be reduced, and energy consumption is saved.
In step S102, the actual power is calculated from the actual voltage and the actual current of the small fresh air machine of the subway station.
After the hourly fresh air volume of the subway station is obtained, the voltage U of the small fresh air fan is further obtained from the energy management system, the current I of the small fresh air fan is measured by the high-precision ammeter, and therefore the power N is obtained through calculation, and the calculation formula is as follows:
N＝IU
wherein N is power and the unit is W; i is current, in units of A; u represents voltage in units of V.
Therefore, after the actual power is obtained according to the actual voltage and the actual current of the small fresh air machine, reliable intermediate data are further provided for the subsequent adjustment of the air valve opening of the small fresh air machine.
In step S103, based on the power-air volume characteristic curve of the small new fan, the one-to-one correspondence between the actual power and the actual fresh air volume of the fan with a single peak or double peaks of the characteristic curve is realized through a preset algorithm, so as to gradually adjust the opening of the air valve of the small new fan until the actual air volume of the small new fan reaches the hourly fresh air volume.
After the time-by-time fresh air volume of the subway station and the actual power of the small fresh air blower are obtained, further, according to the time-by-time fresh air volume and the actual power, the opening of the air valve of the small fresh air blower is adjusted by combining a characteristic curve of power-air volume until the actual air volume of the small fresh air blower reaches the target time-by-time fresh air volume, and the principle of the air-conditioning system of the subway station is shown in fig. 2.
Optionally, in an embodiment of the present application, based on a power-air volume characteristic curve of the small new fan, implementing one-to-one correspondence between actual power and actual fresh air volume of a fan with a single peak or double peaks of the characteristic curve through a preset algorithm, so as to gradually adjust an opening degree of an air valve of the small new fan until the actual air volume of the small new fan reaches a time-by-time fresh air volume, including: based on the fact that any one point on a power N-air quantity Q characteristic curve of the small fresh air fan is represented as (Q, N, N '), and N' is the partial derivative of the point (Q, N), setting the initially measured power N1 and the corresponding opening k1 of the small fresh air valve; adjusting the opening k1 to an opening k2, measuring power N2, and obtaining a corresponding point (Q2 a, N2, N2a ') or (Q2 b, N2, N2 b'), and calculating N2'= (N2-N1)/(k 2-k 1), wherein if N2' is the same as N2a ', the corresponding point is (Q2 a, N2, N2 a'), so as to obtain a corresponding actual fresh air volume Q when the opening of the adjusting valve is the opening k; and comparing the actual fresh air quantity Q with the required hourly fresh air quantity Qx.
Specifically, in the embodiment of the present application, a theoretical formula of the relationship between the power N and the air volume Q of the small and new fan may be expressed as:
N＝γQ·(A-BQ·ctgβ 2 )
in the formula, Q is the air volume of the small fresh air fan and the unit is m 3 S; gamma represents the volume weight of the air to be delivered, in N/m 3 ；β 2 Representing the blade outlet mounting angle.
Therefore, the theoretical relation of N-Q is quadratic, but because the actual fan has loss, fitting of a quadratic function is carried out according to a power-air volume actual measuring point in data provided by a small new fan manufacturer, and the fitting is realized by the following formula:
Figure BDA0003786286730000071
Figure BDA0003786286730000072
in the formula u 2 The peripheral speed of the flow at the blade outlet, in m/s; g is the acceleration of gravity in m/s 2 (ii) a Epsilon is the blade displacement coefficient; pi is the circumference ratio; d 2 Is the diameter of the blade outlet in m; b 2 Is the blade exit width in m.
Thus, after the quadratic function fitting, an N-Q characteristic curve is obtained. Any point on the N = f (Q) function curve may be represented as (Q, N '), where N' is the partial derivative of the point (Q, N).
For example, as shown in fig. 3, the steps of acquiring the actual fresh air volume in the embodiment of the present application are as follows:
1) Setting the initial measured power to N 1 At this time, the opening degree of the small fresh air valve is k 1 ；
2) The opening k of the valve 1 Is adjusted to k 2 Measuring the new power as N 2 Since N = f (Q) is a quadratic function, a corresponding point can be calculated as (Q) 2a ，N 2 ，N 2a ') or (Q 2b ，N 2 ，N 2b ’)；
3) Calculating N 2 ’＝(N 2 -N 1 )/(k 2 -k 1 ) If N is present 2 ' heel N 2a If the sign is the same, the point at this time is (Q) 2a ，N 2 ，N 2a ') i.e. Q 2 ＝Q 2a Otherwise, Q 2 ＝Q 2b ；
4) Through the steps, when the opening of the adjusting valve is k, the actual fresh air quantity Q at the moment can be obtained;
and obtaining the actual fresh air volume through the steps. Further, the embodiment of the application can adjust the opening degree of the air valve of the small fresh air fan by combining the target fresh air volume.
Specifically, the specific process of adjusting the opening degree of the air valve of the small fresh air fan in the embodiment of the present application is as follows:
(1) If Q = Q x Then no adjustment is necessary;
(2) If Q>Q x Gradually decreasing the opening k of the small fresh air valve until Q = Q x ；
(3) If Q<Q x Gradually increasing the opening k of the small fresh air valve until Q = Q x 。
It should be noted that in the embodiment of the present application, the dead zone of the control of the fresh air volume is ± 5%, that is, in the actual implementation process, the opening degree adjustment is not stopped when the actual fresh air volume is strictly equal to the target fresh air volume, but when Q and Q are strictly equal to each other x Deviation of (2)<At 5%, the valve opening k is not changed.
It can be understood that, through the above steps, the actual fresh air volume Q is compared with the above target fresh air volume Q x The opening of the small fresh air valve is continuously controlled, so that the fresh air quantity is accurately adjusted, and the fresh air quantity is matched with the fresh air quantity required by actual hourly passenger flow.
Optionally, in an embodiment of the present application, the preset strategy is to obtain the corresponding actual current I every time the valve is adjusted, and take the average current I within a preset time period, where the average current I is read every preset period.
It should be noted that the valve opening k is adjusted once per minute at a frequency of 1% step. When the valve is adjusted once, the actual current I at the moment is measured, the average current in one minute is taken, and the average current is read every ten seconds, so that the technical personnel in the field can set parameters such as proper adjusting frequency, step length and the like according to the actual condition without specific limitation, and the fresh air quantity is adjusted more reasonably and accurately by setting the parameters such as proper adjusting frequency, adjusting step length and the like.
According to the subway fresh air control method based on the adjusting air valve, provided by the embodiment of the application, the time-by-time fresh air quantity required by a subway station is obtained through time-by-time passenger flow; calculating actual power according to actual voltage and actual current of a small fresh air fan of the subway station; and based on the power-air volume characteristic curve of the small new fan, realizing the one-to-one correspondence of the actual power and the actual fresh air volume of the fan with a single peak or double peaks of the characteristic curve through a preset algorithm so as to gradually adjust the opening of an air valve of the small new fan until the actual air volume of the small new fan accurately reaches the time-by-time fresh air volume, so that the fresh air volume can be adjusted according to the time-by-time passenger flow, the unnecessary fresh air load is reduced, and the energy consumption is saved. In addition, the embodiment of the application can directly utilize the electric fresh air valve of the conventional configuration of the subway station to control, does not need to additionally install the frequency converter of the small fresh air machine, saves the cost of the frequency converter, is easy to implement, and has little influence on the existing BAS and intelligent low-voltage system.
Next, a subway fresh air control device based on an adjusting air valve provided according to an embodiment of the application is described with reference to the attached drawings.
Fig. 4 is a block schematic diagram of a subway fresh air control device based on an adjusting air valve according to an embodiment of the application.
As shown in fig. 4, the subway fresh air control device 10 based on the adjusting air valve comprises: an acquisition module 100, a calculation module 200 and an adjustment module 300.
The obtaining module 100 is configured to obtain a time-by-time fresh air volume required by a subway station through time-by-time passenger flow.
And the calculating module 200 is used for calculating the actual power according to the actual voltage and the actual current of the small and new fan of the subway station.
The adjusting module 300 is configured to implement a one-to-one correspondence between the actual power and the actual fresh air volume of the fan with a single or double peak of the characteristic curve through a preset algorithm based on the power-air volume characteristic curve of the small fresh air fan, so as to gradually adjust the opening of the air valve of the small fresh air fan until the actual air volume of the small fresh air fan reaches the hourly fresh air volume.
Optionally, in an embodiment of the present application, the obtaining module includes: the system comprises a passenger flow volume obtaining unit and a fresh air volume calculating unit.
The passenger flow acquiring unit is used for acquiring the time-by-time inbound passenger flow and the time-by-time outbound passenger flow of the subway station.
And the fresh air volume calculating unit is used for calculating the hourly fresh air volume according to the hourly incoming passenger flow volume, the hourly outgoing passenger flow volume and the average stay time of personnel.
Optionally, in an embodiment of the present application, a calculation formula of the time-by-time fresh air volume is:
Q x ＝q 0 ·(n hall +n platform )，
Figure BDA0003786286730000091
Figure BDA0003786286730000092
wherein Q x The required fresh air volume by time is expressed in m 3 /h；q 0 The new air quantity required by a single person is expressed in the unit of m 3 /h；n hall 、n platform Respectively representing the equivalent number of people in the time-by-time station hall and the station; a. The in 、A out Respectively representing the number of people who get in and out of the station by time, and the unit is people/h; a is a 1 、a 2 Respectively representing the average time of passengers staying in a station hall and a station platform respectively when the passengers get in the station, wherein the unit is min; b is a mixture of 1 、b 2 Respectively represents the average time of passengers staying in a station hall and a station platform when the passengers leave the station, and the unit is min.
Optionally, in an embodiment of the present application, the adjusting module includes: a setting unit, an adjusting unit and a comparing unit.
The setting unit is used for setting the initial measured power N1 and the corresponding opening k1 of the small fresh air valve based on the fact that any point on a power N-air quantity Q characteristic curve of the small fresh air fan is represented as (Q, N, N '), and N' is the partial derivative of the point (Q, N).
And the adjusting unit is used for adjusting the opening k1 to an opening k2, measuring the power N2, obtaining corresponding points (Q2 a, N2, N2a ') or (Q2 b, N2, N2 b'), and calculating N2'= (N2-N1)/(k 2-k 1), wherein if the N2' and the N2a 'are in the same direction, the corresponding points are (Q2 a, N2, N2 a'), so that when the opening of the adjusting valve is the opening k, the corresponding actual fresh air volume Q is obtained.
And the comparison unit is used for comparing the actual fresh air quantity Q with the required hourly fresh air quantity Qx.
Optionally, in an embodiment of the present application, the preset strategy is to obtain a corresponding actual current I each time the valve is adjusted, and take an average current I within a preset time duration, where the average current I is read every preset period.
It should be noted that the foregoing explanation of the embodiment of the subway fresh air control method based on the adjusting air valve is also applicable to the subway fresh air control device based on the adjusting air valve of the embodiment, and is not repeated here.
According to the subway fresh air control device based on the adjusting air valve, the time-by-time fresh air quantity required by a subway station is obtained through time-by-time passenger flow; calculating actual power according to actual voltage and actual current of a small fresh air fan of the subway station; and based on the power-air volume characteristic curve of the small new fan, realizing the one-to-one correspondence between the actual power and the actual fresh air volume of the fan with a single peak or double peaks of the characteristic curve through a preset algorithm so as to gradually adjust the opening of an air valve of the small new fan until the actual air volume of the small new fan accurately reaches the hourly fresh air volume, thereby adjusting the fresh air volume according to the hourly passenger flow, reducing unnecessary fresh air load and saving energy consumption. In addition, the embodiment of the application can directly utilize the electric fresh air valve of the conventional configuration of the subway station to control, does not need to additionally install the frequency converter of the small fresh air machine, saves the cost of the frequency converter, is easy to implement, and has little influence on the existing BAS and intelligent low-voltage system.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device may include:
memory 501, processor 502, and computer programs stored on memory 501 and executable on processor 502.
When the processor 502 executes the program, the subway fresh air control method based on the air valve regulation provided in the above embodiments is implemented.
Further, the electronic device further includes:
a communication interface 503 for communication between the memory 501 and the processor 502.
A memory 501 for storing computer programs that can be run on the processor 502.
The memory 501 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
If the memory 501, the processor 502 and the communication interface 503 are implemented independently, the communication interface 503, the memory 501 and the processor 502 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 5, but this is not intended to represent only one bus or type of bus.
Alternatively, in practical implementation, if the memory 501, the processor 502 and the communication interface 503 are integrated on a chip, the memory 501, the processor 502 and the communication interface 503 may complete communication with each other through an internal interface.
The processor 502 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present Application.
The embodiment also provides a computer readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the method for controlling fresh air of a subway based on an air valve adjustment is realized.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or N executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or N wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Further, the computer readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are well known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (12)

1. A subway fresh air control method based on an adjusting air valve is characterized by comprising the following steps;
acquiring the time-by-time fresh air quantity required by the subway station through the time-by-time passenger flow;
calculating actual power according to the actual voltage and the actual current of the small fresh air machine of the subway station; and
based on the power-air volume characteristic curve of the small new fan, the one-to-one correspondence between the actual power and the actual fresh air volume of the fan with a single peak or double peaks of the characteristic curve is realized through a preset algorithm, so that the opening degree of an air valve of the small new fan is gradually adjusted until the actual air volume of the small new fan reaches the hourly fresh air volume.
2. The method according to claim 1, wherein the obtaining of the hourly fresh air volume of the subway station comprises:
acquiring the hourly inbound passenger flow volume and the hourly outbound passenger flow volume of the subway station;
and calculating the hourly fresh air volume according to the hourly inbound passenger volume, the hourly outbound passenger volume and the average personnel residence time.
3. The method according to claim 2, wherein the calculation formula of the hourly fresh air volume is as follows:
Q x ＝q 0 ·(n hall +n platform )，
Figure FDA0003786286720000011
Figure FDA0003786286720000012
wherein Q is x The required fresh air volume by time is expressed in m 3 /h；q 0 The new air quantity required by a single person is expressed in the unit of m 3 /h；n hall 、n platform Respectively representing the equivalent number of people of the time-by-time station hall and the station platform; a. The in 、A out Respectively representing the number of people who get in and out of the station by time, and the unit is people/h; a is 1 、a 2 Respectively representing the average time of passengers staying in a station hall and a station platform respectively when the passengers get in the station, wherein the unit is min; b 1 、b 2 Respectively represents the average time of the passengers staying in the station hall and the station platform when the passengers leave the station, and the unit is min.
4. The method according to claim 1, wherein the step of realizing the one-to-one correspondence between the actual power and the actual fresh air volume of the fan with a single peak or double peaks of a characteristic curve by a preset algorithm based on the power-air volume characteristic curve of the small fresh air fan to gradually adjust the opening degree of the air valve of the small fresh air fan until the actual air volume of the small fresh air fan reaches the time-by-time fresh air volume comprises the following steps:
setting initial measured power N1 and corresponding opening k1 of the small fresh air valve based on that any one point on the characteristic curve of the power N-air quantity Q of the small fresh air fan is represented as (Q, N, N '), and N' is the partial derivative of the point (Q, N);
adjusting the opening k1 to an opening k2, measuring power N2, and obtaining a corresponding point (Q2 a, N2, N2a ') or (Q2 b, N2, N2 b'), and calculating N2'= (N2-N1)/(k 2-k 1), wherein if N2' is the same as N2a ', the corresponding point is (Q2 a, N2, N2 a'), so as to obtain a corresponding actual new air volume Q when the opening of the adjusting valve is the opening k;
and comparing the actual fresh air quantity Q with the required hourly fresh air quantity Qx.
5. The method of claim 4, wherein the predetermined strategy is to obtain a corresponding actual current I for each valve adjustment, and to take an average current I over a predetermined time period, wherein the average current I is read every predetermined period.
6. The utility model provides a subway new trend controlling means based on adjust blast gate which characterized in that includes:
the acquisition module is used for acquiring the time-by-time fresh air quantity required by the subway station through the time-by-time passenger flow;
the calculation module is used for calculating actual power according to the actual voltage and the actual current of the small fresh air machine of the subway station; and
and the adjusting module is used for realizing the one-to-one correspondence between the actual power and the actual fresh air volume of the fan with a single peak or double peaks of the characteristic curve through a preset algorithm based on the power-air volume characteristic curve of the small new fan so as to gradually adjust the opening of the air valve of the small new fan until the actual air volume of the small new fan reaches the hourly fresh air volume.
7. The apparatus of claim 6, wherein the obtaining module comprises:
the system comprises a passenger flow volume acquisition unit, a passenger flow volume acquisition unit and a passenger flow volume display unit, wherein the passenger flow volume acquisition unit is used for acquiring the hourly inbound passenger flow volume and the hourly outbound passenger flow volume of the subway station;
and the fresh air volume calculating unit is used for calculating the hourly fresh air volume according to the hourly inbound passenger flow volume, the hourly outbound passenger flow volume and the average personnel residence time.
8. The apparatus of claim 7, wherein the calculation formula of the hourly new air volume is:
Q x ＝q 0 ·(n hall +n platform )，
Figure FDA0003786286720000021
Figure FDA0003786286720000022
wherein Q is x The unit of the required time-by-time fresh air volume is m 3 /h；q 0 The new air quantity required by a single person is expressed in the unit of m 3 /h；n hall 、n platf0rm Respectively representing the equivalent number of people in the time-by-time station hall and the station; a. The in 、A out Respectively representing the number of people who get on and get off the station time by time, and the unit is people/h; a is 1 、a 2 Respectively representing the average time of passengers staying in a station hall and a station platform respectively when the passengers get in the station, wherein the unit is min; b 1 、b 2 Respectively represents the average time of passengers staying in a station hall and a station platform when the passengers leave the station, and the unit is min.
9. The apparatus of claim 6, wherein the adjustment module comprises:
the setting unit is used for setting an initial measured power N1 and an opening k1 of a corresponding small fresh air valve based on the fact that any point on a power N-air volume Q characteristic curve of the small fresh air fan is represented as (Q, N, N '), and N' is a partial derivative of the point (Q, N);
an adjusting unit, configured to adjust the opening k1 to an opening k2, measure a power N2, and obtain a corresponding point (Q2 a, N2a ') or (Q2 b, N2 b'), and calculate N2'= (N2-N1)/(k 2-k 1), where if N2' is in the same direction as N2a ', the corresponding point is (Q2 a, N2 a'), so as to obtain a corresponding actual fresh air volume Q when the opening of the adjusting valve is the opening k;
and the comparison unit is used for comparing the actual fresh air quantity Q with the required hourly fresh air quantity Qx.
10. The apparatus of claim 9, wherein the predetermined strategy is to obtain the corresponding actual current I for each valve adjustment, and to take the average current I for a predetermined duration, wherein the average current I is read every predetermined period.
11. An electronic device, comprising: the subway fresh air control method based on the adjusting air valve comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the program to realize the subway fresh air control method based on the adjusting air valve according to any one of claims 1-5.
12. A computer-readable storage medium, on which a computer program is stored, wherein the program is executed by a processor for implementing the subway fresh air control method based on adjusting air valves according to any one of claims 1-5.
CN202210942534.0A 2022-08-08 2022-08-08 Subway fresh air control method, device, equipment and medium based on adjusting air valve Pending CN115307289A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116358127A (en) * 2023-03-31 2023-06-30 清华大学 Subway station fresh air valve control method and device, electronic equipment and storage medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116358127A (en) * 2023-03-31 2023-06-30 清华大学 Subway station fresh air valve control method and device, electronic equipment and storage medium
CN116358127B (en) * 2023-03-31 2023-10-27 清华大学 Subway station fresh air valve control method and device, electronic equipment and storage medium

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