CN113217446A - Tunnel early-late ventilation control system and method - Google Patents
Tunnel early-late ventilation control system and method Download PDFInfo
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- CN113217446A CN113217446A CN202110528636.3A CN202110528636A CN113217446A CN 113217446 A CN113217446 A CN 113217446A CN 202110528636 A CN202110528636 A CN 202110528636A CN 113217446 A CN113217446 A CN 113217446A
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- 238000009423 ventilation Methods 0.000 title claims abstract description 129
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 230000003993 interaction Effects 0.000 claims abstract description 16
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 238000011160 research Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
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- 230000003203 everyday effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/003—Ventilation of traffic tunnels
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Abstract
The invention relates to a tunnel morning and evening ventilation control system and a tunnel morning and evening ventilation control method, which comprise an interval tunnel ventilation system and a frequency conversion control system, wherein the frequency conversion control system comprises a controller, a frequency converter and a human-computer interaction interface, the human-computer interaction interface is connected with the controller, the controller is connected with the frequency converter, the frequency converter is connected with a tunnel fan of the interval tunnel ventilation system, the human-computer interaction interface is used for setting the morning and evening tunnel air volume and the running time of an operator and transmitting the set information to the controller, the controller calculates the fan running frequency f required by the tunnel at the given time t during the morning and evening ventilation according to the relation between the air volume and the frequency, the frequency converter controls the tunnel fan to carry out ventilation by calculating the frequency f under the morning and evening ventilation working condition, and controls the tunnel fan to stop running after the tunnel fan runs for t hours. According to the invention, the operation frequency of the fan is automatically adjusted and the fan is controlled to operate according to the morning and evening ventilation air volume and the operation time set by a user, so that the ventilation requirement is ensured and the ventilation energy consumption is reduced as much as possible.
Description
Technical Field
The invention belongs to the technical field of subway tunnel ventilation systems, and particularly relates to a tunnel early-late ventilation control system and a tunnel early-late ventilation control method.
Background
With the continuous promotion of the urbanization process of China, the urban population is continuously increased, and the urban road traffic pressure is continuously increased. Subway traffic systems are becoming an important means for traffic pressure diversion in large cities. The ventilation system of the interval tunnel is an important ring for supporting the normal operation of the subway traffic system. The ventilation system of the interval tunnel is mainly responsible for ventilation in the morning and evening and ventilation and smoke exhaust under accident conditions such as fire or blockage in the interval tunnel.
The ventilation of the ventilation system of the interval tunnel is mainly carried out for half an hour before the train is operated every day and after the train is stopped. The main function of the ventilation in the morning and evening is to exhaust heat and ventilate the subway tunnel. Pollutants generated by maintenance and repair in the tunnel at night can be removed in the morning operation, and pollutants generated in the daytime train operation and waste heat which is not removed by piston wind can be removed in the night operation. In addition, the operation condition of the ventilation equipment can be checked through the ventilation operation in the morning and evening, and the ventilation equipment can be timely put into use when an accident happens.
Many current scholars' research on the strategy of tunnel ventilation systems are mostly focused on the heat removal and ventilation strategy of tunnels when trains are running. The patent with application number CN201710031855 proposes a control method for calculating the heat dissipation capacity of a train in a tunnel by monitoring the air temperature and the outdoor temperature in the tunnel, adjusting the operation mode of a heat exhausting fan, and performing system energy saving by combining heat recovery. However, the number of passengers transported by the train at each station has a large variation range, and the temperature fluctuation range in the tunnel is large, which can cause inaccurate control. The patent with the application number of CN201910122820 provides a method for dynamically controlling a tunnel based on real-time wind pressure in the tunnel, which achieves the purpose of dynamically controlling the operation of a fan by constructing a transfer function related to the wind pressure in the tunnel and the operation frequency of the fan and simultaneously connecting the real-time wind pressure in the tunnel with the operation frequency of the fan. Including the above two mentioned inventions, many researches on subway tunnel ventilation systems focus on operation control of the ventilation system when a train operates, and tunnel fan control strategies are few when a tunnel is ventilated early and late.
Through research, the rated power of the tunnel fan is usually very large. When ventilation is carried out in the morning and evening, the tunnel fans all operate by power frequency, and the power consumption is higher. The power consumption of the ventilation of an interval tunnel of a subway line with 25 stations in the morning and evening is about 150 ten thousand degrees. Investigation tests show that when cold air is introduced during the work of the tunnel fan at night, the temperature in the tunnel is greatly reduced. After ventilation in the evening is finished, the temperature rises again and keeps stable. The heat removed by ventilation in the evening exceeds the residual heat to be removed. The CO2 concentration and the particulate matter concentration are mainly related to the passenger flow and the driving condition. After the late peak passed, the CO2 concentration began to drop. At night the tunnel blower started working, the CO2 concentration had dropped to a lower concentration (400 ppm). After the train is shut down, the suspended particles in the tunnel gradually settle to a lower level (15ug/m3) by the time the tunnel fan starts to work at night. On the premise of ensuring the removal of residual heat and the air quality in the tunnel at night, the frequency conversion regulation control can be carried out on the tunnel fan to achieve the purpose of energy conservation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a system and a method for controlling ventilation of a tunnel in the morning and at night.
The technical scheme of the invention is realized as follows: the invention discloses a tunnel morning and evening ventilation control system which comprises an interval tunnel ventilation system and a frequency conversion control system, wherein the frequency conversion control system comprises a controller, a frequency converter and a human-computer interaction interface, the human-computer interaction interface is connected with the controller, the controller is connected with the frequency converter, and the frequency converter is connected with a tunnel fan of the interval tunnel ventilation system.
The ventilation control system for the early and late tunnel further comprises a BAS system, and the BAS system is connected with the controller.
The human-computer interaction interface is used for setting the air volume and the operation time of the tunnel in the morning and evening by an operator and transmitting the set information to the controller, the controller calculates the required fan operation frequency f at a given time t during ventilation of the tunnel in the morning and evening according to the relationship between the air volume and the frequency, the frequency converter controls the tunnel fan to perform ventilation at the calculated frequency f under the ventilation working condition in the morning and evening, and the tunnel fan is controlled to stop operating after the tunnel fan operates for t hours;
the relationship between the air volume and the frequency is as follows:
in the formula, Q0The actual ventilation air volume is the actual ventilation air volume under the working condition of the power frequency of the tunnel fan; q is the ventilation air quantity of the tunnel fan in operation; f. of0The power frequency of the tunnel fan is obtained; f is the operating frequency of the tunnel fan in the morning and evening ventilation working conditions; and t is the time required by the fan to operate.
The invention discloses a tunnel early-late ventilation control method, which comprises the following steps:
s1) the control system judges whether the tunnel is in an accident condition, if so, the control system controls the tunnel fan to operate a power frequency mode when the tunnel is ventilated in the morning and evening, and step S21) is executed; if not, controlling the tunnel fan to operate the frequency conversion mode of the step S22) when the tunnel is ventilated in the morning and evening;
s21) whether the tunnel ventilation requirement is met, if yes, controlling the tunnel fan to stop running, and if not, controlling the tunnel fan to continue running in a power frequency mode;
s22) the controller calculates the required fan operation frequency f at a given time t when the tunnel is ventilated in the morning and evening according to the tunnel ventilation volume setting and the relationship between the air volume and the frequency, under the ventilation working condition in the morning and evening, the frequency converter controls the tunnel fan to calculate the frequency f to ventilate, the frequency converter judges whether the given time is reached or not when the tunnel fan operates for t hours, if not, the tunnel fan is controlled to continuously execute the frequency conversion mode of S22), and if so, the tunnel fan is controlled to stop operating.
Further, the relationship between the air volume and the frequency is as follows:
in the formula, Q0The actual ventilation air volume is the actual ventilation air volume under the working condition of the power frequency of the tunnel fan; q is the ventilation air quantity of the tunnel fan in operation; f. of0The power frequency of the tunnel fan is obtained; f is the operating frequency of the tunnel fan in the morning and evening ventilation working conditions; and t is the time required by the fan to operate.
Furthermore, a man-machine interaction interface is adopted to set the air volume and the operation time of the early-late tunnel.
Further, the control system judges whether the tunnel is in an accident condition, and specifically comprises: the control system collects the fire fighting condition and the train running condition in the tunnel through the BAS system and judges whether the tunnel is in an accident condition.
The invention has at least the following beneficial effects: the invention provides a method for ventilating a subway section tunnel in the morning and evening by using a power frequency operation tunnel fan, which aims to solve the common phenomenon that the current subway section tunnel uses the power frequency operation tunnel fan to ventilate in the morning and evening, changes the power frequency operation mode of the traditional tunnel fan when ventilating in the morning and evening, and adopts a frequency conversion mode to operate under the working condition of ventilation in the morning and evening. According to the invention, the operation frequency of the fan is automatically adjusted to control the operation of the fan according to the morning and evening ventilation air volume and the operation time set by a user, so that the ventilation requirement is ensured and the ventilation energy consumption is reduced as much as possible.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic block diagram of a tunnel early-late ventilation control system according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for controlling ventilation of a tunnel in the morning and evening 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.
Example one
Referring to fig. 1 and 2, an embodiment of the present invention provides a tunnel early-late ventilation control system, including an interval tunnel ventilation system and a frequency conversion control system, where the interval tunnel ventilation system includes a ventilation air shaft 1, a tunnel fan 2, and an interval tunnel 3, and the frequency conversion control system includes a controller 41, a frequency converter 42, a power-intensive component 43 such as an air switch, a thermal relay, etc., a human-computer interaction interface 44, and a power supply for supplying power to the entire frequency conversion control system. The controller is connected with a human-computer interaction interface 44, and the air quantity and the fan running time required by the ventilation in the morning and evening are set through the human-computer interaction interface. The controller 41 is connected with the frequency converter 42, and the frequency converter 42 is connected with the tunnel fan 2. And the frequency converter controls the tunnel fan to operate according to the frequency calculated by the controller. And under the ventilation working conditions of morning and evening, the tunnel fan is stopped after running for t hours (set time) according to the calculated frequency.
The ventilation control system for the early and late tunnel further comprises a BAS system 5, wherein the BAS system 5 is connected with the controller 41.
The human-computer interaction interface is used for setting the air volume and the operation time of the tunnel in the morning and evening by an operator and transmitting the set information to the controller, the controller calculates the required fan operation frequency f at a given time t during ventilation of the tunnel in the morning and evening according to the relationship between the air volume and the frequency, the frequency converter controls the tunnel fan to perform ventilation at the calculated frequency f under the ventilation working condition in the morning and evening, and the tunnel fan is controlled to stop operating after the tunnel fan operates for t hours;
the relationship between the air volume and the frequency is as follows:
in the formula, Q0(m3Per) is the actual ventilation air quantity under the working condition of power frequency of the tunnel fan and the actual ventilation air quantity Q under the working condition of power frequency0The rated air quantity under the power frequency of the fan is provided by a fan manufacturer; q (m)3) The ventilation air volume of the tunnel fan is set manually according to the ventilation requirement; f. of0(Hz) is the power frequency of the tunnel fan, and the power frequency f of the tunnel fan0Providing parameters by a fan manufacturer; (Hz) is the operating frequency of the tunnel fan in the morning and evening; and t (h) is the time for which the fan needs to operate.
When accidents such as blockage or fire disasters occur, the working condition of accident ventilation and smoke exhaust is different from the normal ventilation working condition at ordinary times, and the power frequency operation of a tunnel fan is needed to ensure the air quantity and the section air speed in the tunnel.
Example two
Referring to fig. 1 and fig. 2, an embodiment of the present invention discloses a method for controlling ventilation of a tunnel in the morning and evening, including the following steps:
s1) the control system judges whether the tunnel is in an accident condition, if so, the control system controls the tunnel fan to operate a power frequency mode when the tunnel is ventilated in the morning and evening, and step S21) is executed; if not, changing the power frequency operation mode of the traditional tunnel fan during ventilation in the morning and evening, and controlling the tunnel fan to operate the frequency conversion mode of the step S22) during ventilation in the morning and evening;
s21) whether the tunnel ventilation requirement is met, if yes, controlling the tunnel fan to stop running, and if not, controlling the tunnel fan to continue running in a power frequency mode;
s22) operating in a frequency conversion mode, which specifically comprises: the controller calculates the required fan operation frequency f at a given time t during the ventilation of the tunnel in the morning and evening according to the set tunnel ventilation quantity Q and the relationship between the air quantity and the frequency, the frequency converter controls the tunnel fan to perform ventilation at the calculated frequency f under the ventilation working condition in the morning and evening, the frequency converter judges whether the given time is reached or not after t hours of operation, if not, the tunnel fan is controlled to continue to execute the frequency conversion mode of S22), and if so, the tunnel fan is controlled to stop operating.
And when the tunnel is in the accident working condition or not, if the tunnel is in the blocking working condition, the section wind speed and the temperature at the blocking position need to meet the standard requirements. If the fire disaster occurs, the section wind speed at the fire disaster position needs to reach the standard requirement and be larger than the critical wind speed of the fire disaster.
The relation between the actual air quantity of the fan and the fan frequency is determined through actual measurement and debugging, and the fan operation frequency is obtained through interval tunnel ventilation times in the actual operation process of early and late ventilation. The ventilation frequency of the tunnel is 3 times/h, and for the ventilation working conditions of the morning and the evening, the set tunnel ventilation rate, namely the air volume of the variable-frequency operation of the fan, needs to meet the ventilation of the tunnel for 1.5 times, and if the ventilation is carried out for the morning and evening, the air volume of the variable-frequency operation of the fan
Q＝1.5SL (1)
In the formula, Q (m)3) The ventilation air quantity for the operation of the tunnel fan; s (m)2) And L (m) are the ventilation cross section area of the interval tunnel and the length of the unilateral tunnel respectively.
Further, according to the relationship between the air volume and the frequency, the required fan operation frequency at a given time can be calculated when the tunnel is ventilated in the morning and evening, and the relationship between the air volume and the frequency is as follows:
in the formula, Q0(m3Per) is the actual ventilation air quantity under the working condition of power frequency of the tunnel fan and the actual ventilation air quantity Q under the working condition of power frequency0The rated air quantity under the power frequency of the fan is provided by a fan manufacturer; q (m)3) The ventilation air volume of the tunnel fan is set manually according to the ventilation requirement; f. of0(Hz) is the power frequency of the tunnel fan, and the power frequency f of the tunnel fan0Providing parameters by a fan manufacturer; (Hz) is the operating frequency of the tunnel fan in the morning and evening; t is the time required by the fan to operate, and the unit is hour.
Furthermore, a man-machine interaction interface is adopted to set the air volume and the operation time of the early-late tunnel.
Further, the control system judges whether the tunnel is in an accident condition, and specifically comprises: the control system collects the fire fighting condition and the train running condition in the tunnel through the BAS system and judges whether the tunnel is in an accident condition.
The invention provides a new control system and method for ventilation of a tunnel in the morning and evening aiming at energy-saving optimization of the conventional tunnel ventilation system. Pollutants generated by maintenance and repair in the tunnel at night can be removed in the morning operation, and pollutants generated in the daytime train operation and waste heat which is not removed by piston wind can be removed in the night operation. In addition, the operation condition of the ventilation equipment can be checked through the ventilation operation in the morning and evening, and the ventilation equipment can be timely put into use when an accident happens. The control system and the control method introduce a frequency conversion control method aiming at the current situation that the tunnel fan ventilation in the morning and evening generally adopts power frequency ventilation at present, and simultaneously cooperate with a BAS system to reduce the ventilation energy consumption in the morning and evening of the tunnel ventilation system in each day interval by artificially inputting the running air volume of the tunnel fan while controlling the tunnel fan in a frequency conversion way, so that the aim of saving the ventilation energy consumption in the morning and evening can be achieved on the premise of ensuring the heat and humidity environment and the air quality of the tunnel in the subway interval.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a tunnel ventilation control system morning and evening which characterized in that: including interval tunnel ventilation system and frequency conversion control system, frequency conversion control system includes controller, converter and human-computer interaction interface, human-computer interaction interface is connected with the controller, the controller is connected with the converter, and the converter is connected with interval tunnel ventilation system's tunnel fan.
2. The tunnel early-late ventilation control system of claim 1, wherein: the system also comprises a BAS system, and the BAS system is connected with the controller.
3. The tunnel early-late ventilation control system of claim 1, wherein: the human-computer interaction interface is used for setting the air volume and the operation time of the tunnel in the morning and evening by an operator and transmitting the set information to the controller, the controller calculates the required fan operation frequency f at a given time t during ventilation of the tunnel in the morning and evening according to the relationship between the air volume and the frequency, the frequency converter controls the tunnel fan to perform ventilation at the calculated frequency f under the ventilation working condition in the morning and evening, and the tunnel fan is controlled to stop operating after the tunnel fan operates for t hours;
the relationship between the air volume and the frequency is as follows:
in the formula, Q0The actual ventilation air volume is the actual ventilation air volume under the working condition of the power frequency of the tunnel fan; q is the ventilation air quantity of the tunnel fan in operation; f. of0The power frequency of the tunnel fan is obtained; f is the operating frequency of the tunnel fan in the morning and evening ventilation working conditions; and t is the time required by the fan to operate.
4. A tunnel early-late ventilation control method is characterized by comprising the following steps:
s1) the control system judges whether the tunnel is in an accident condition, if so, the control system controls the tunnel fan to operate a power frequency mode when the tunnel is ventilated in the morning and evening, and step S21) is executed; if not, controlling the tunnel fan to operate the frequency conversion mode of the step S22) when the tunnel is ventilated in the morning and evening;
s21) whether the tunnel ventilation requirement is met, if yes, controlling the tunnel fan to stop running, and if not, controlling the tunnel fan to continue running in a power frequency mode;
s22) the controller calculates the required fan operation frequency f at a given time t when the tunnel is ventilated in the morning and evening according to the tunnel ventilation volume setting and the relationship between the air volume and the frequency, under the ventilation working condition in the morning and evening, the frequency converter controls the tunnel fan to calculate the frequency f to ventilate, the frequency converter judges whether the given time is reached or not when the tunnel fan operates for t hours, if not, the tunnel fan is controlled to continuously execute the frequency conversion mode of S22), and if so, the tunnel fan is controlled to stop operating.
5. The method for controlling ventilation of a tunnel in the morning and evening according to claim 4, wherein: the relationship between the air volume and the frequency is as follows:
in the formula, Q0The actual ventilation air volume is the actual ventilation air volume under the working condition of the power frequency of the tunnel fan; q is the ventilation air quantity of the tunnel fan in operation; f. of0The power frequency of the tunnel fan is obtained; f is the operating frequency of the tunnel fan in the morning and evening ventilation working conditions; and t is the time required by the fan to operate.
6. The method for controlling ventilation of a tunnel in the morning and evening according to claim 4, wherein: and setting the air volume and the operation time of the early-late tunnel by adopting a human-computer interaction interface.
7. The method for controlling ventilation of a tunnel in the morning and evening according to claim 4, wherein: control system judges whether the tunnel is in accident condition, specifically includes: the control system collects the fire fighting condition and the train running condition in the tunnel through the BAS system and judges whether the tunnel is in an accident condition.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167798A (en) * | 2021-10-26 | 2022-03-11 | 皇家动力(武汉)有限公司 | Tunnel environment monitoring control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167798A (en) * | 2021-10-26 | 2022-03-11 | 皇家动力(武汉)有限公司 | Tunnel environment monitoring control system |
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