JP2550178B2 - Tunnel ventilation control - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention generally relates to a ventilation control device for a tunnel, and more particularly to, for example, a ventilation control device for a road tunnel.

(Prior Art) As is well known, a road tunnel is made for the purpose of passing an unspecified number of various types of vehicles. Measures have been taken to discharge the exhaust gas discharged inside the tunnel to the outside of the road tunnel.

As measures described above, for example, a vertical shaft is provided as an exhaust passage that connects the road tunnel and the outside, a jet fan is used as a device for performing ventilation in the road tunnel, and soot is removed from the air by an electric filter. An electric dust collector, etc. is installed on the one hand, and a blower / exhaust fan, etc. is installed on the other hand as a device for ventilation in the vertical shaft. There is a method of maintaining the pollution concentration of the air in the tunnel below an allowable value.
In a long tunnel of which the length exceeds 3000 m among the above-mentioned road tunnels, in order to improve the efficiency of ventilation, the ventilation in the tunnel is often performed by operating a plurality of the above-mentioned ventilators in combination. There are a plurality of control modes for adjusting the ventilation air volume in the tunnel by operating a plurality of such ventilators in combination according to the type of the ventilator to be operated. For example, when operating a jet fan as a ventilator,
By controlling the number of operating units (so-called unit number control),
When the ventilation air volume is adjusted, or when an electrostatic precipitator, a blower, an air exhauster, or the like is operated as the ventilator, the ventilation air volume is continuously adjusted by variably adjusting the blade angles of the fans that compose the devices. Therefore, when performing the above-mentioned variable adjustment of the ventilation air volume, first determine the combination of the ventilators to be operated, and then, in the case of a ventilator that can change the air volume by variably adjusting the blade angle of the fan described above. The air volume will be adjusted. Then, the pollution concentration of the air in the tunnel is controlled.

(Problems to be Solved by the Invention) By the way, if the operation of the ventilator is controlled only for the purpose of maintaining the pollution concentration of air in the road tunnel at a preset allowable value or less, It is the simplest method of controlling the ventilator to operate all the ventilators installed in the. However, if such a control method is adopted, the ventilator will be operated more than necessary even when the air pollutant concentration in the tunnel is not so high, so in a long tunnel with many ventilators installed, The power consumption required to operate the ventilator will also be enormous.

Therefore, in order to suppress the required electric power to a low level, it is desirable to perform control to change which ventilator and which ventilator are to be operated or the combination of the ventilators to be operated according to the traffic volume of the vehicle.

Conventionally, when performing the above-mentioned control, the operating pattern of the ventilator for one day is set in advance by utilizing the fact that the pollution concentration of the air in the tunnel depends on the traffic volume of the vehicle passing through the tunnel. The ventilation operation combination is changed according to the set operation pattern, or an operation plan for each of the above-mentioned ventilators is made based on the traffic volume forecast of about one hour cycle, and each ventilation is performed according to the plan. Controls such as changing the operation combination of the machine were performed.

However, when performing the above-mentioned control, the above-mentioned operation pattern is checked without checking the pollutant concentration of the air in the tunnel at the time of changing the operation combination of the ventilator and the operation state (load) of each ventilator. And the above-mentioned fixed-cycle operation plan was unconditionally followed. Therefore, even if there is a general tendency in terms of one day, the above control is performed only on the basis of traffic volume patterns that fluctuate daily and traffic volume prediction data with large errors. When the pollution concentration or the load on the ventilator is high, the number of operating ventilators is reduced so that the pollution concentration of the air in the tunnel exceeds the allowable value, or conversely, when the pollution concentration or the load on the ventilator is low, ventilation is performed. There was a problem that the number of operating machines was increased and the ventilation machines were operated more than necessary, resulting in excessive ventilation.

Therefore, the present invention has been made to solve the above-mentioned problems, and its purpose is to prevent the pollutant concentration of the air in the tunnel from being deteriorated or conversely to cause excessive ventilation, and to combine the operation of the ventilator. By providing a ventilation control device for the tunnel, it is possible to improve the control system for the air pollution concentration in the tunnel and also reduce the power consumption required to operate the ventilator. To do.

[Structure of Invention]

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention detects an output signal from a pollution concentration detecting means for detecting a pollution concentration of air in a tunnel and a traffic volume passing through the tunnel. In the ventilation control device of the tunnel that controls a plurality of ventilators installed to ventilate the air in the tunnel based on the output signal from the traffic volume detection means, the traffic volume detection means detects the A traffic volume prediction unit that predicts traffic volume based on past traffic volume data, a combination selection table storage unit that stores a ventilation operation combination selection table according to the traffic volume, and the traffic volume prediction unit predicted A ventilation operation combination selection unit that selects candidates for the ventilation operation combination from the combination selection table stored in the combination selection table storage unit based on traffic volume, When the aerator operation combination selection unit changes the operation combination of the ventilator, the ventilation reference air volume calculation unit that calculates the air volume of each ventilation after the change, and the ventilation operation combination selection unit is a ventilation operation combination A combination change condition storage unit that stores a condition relating to the pollution concentration and the load of the ventilator to be changed, and an output signal of the pollution concentration detection unit and the load of the ventilator are stored in the combination change condition storage unit. The configuration has a combination change determination unit that checks whether the conditions are met and determines a combination change, and a combination change execution unit that actually starts and stops the ventilator and actually changes the operation combination. It is a thing.

(Operation) In the above configuration, the traffic volume prediction value data passing through the tunnel detected by the traffic volume detection means is given to the traffic volume prediction section, and the traffic volume prediction section is based on the traffic volume measurement value data. Predict traffic at regular intervals. The ventilation machine operation combination selection unit selects a ventilation machine operation combination corresponding to the low cycle traffic volume prediction value by the traffic volume prediction unit from the combination selection table stored in the combination selection table storage unit. When the traffic volume predicted by the traffic volume prediction section for the ventilation combination selected by the ventilation operation combination selection section passes through the tunnel, the ventilation standard air volume calculation section calculates the air volume in the tunnel. Calculate the standard air volume of each ventilator that is considered necessary to maintain the pollutant concentration below the allowable value. The combination change decision unit decides whether to actually change the operation combination of the ventilator, and the change of the operation combination by the combination change decision unit is performed by the pollution concentration and the ventilation stored in the combination change condition storage unit. It is determined by referring to the conditions for the machine load. The basic conditions for changing the operating combination of the ventilator stored in the combination change condition storage unit are as described below. That is, it is roughly divided into the case where the number of operating ventilators is increased and the case where it is decreased. If the ventilator load is high rather than over-ventilation, increase the number of operating ventilators, and if the air pollutant concentration in the tunnel and the ventilator load are low,
This will reduce the number of operating ventilation machines. The combination change execution unit actually starts and stops the ventilator when the combination change decision unit decides to change the operation combination of the ventilator, and changes the operation combination of the ventilator.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a schematic diagram showing a ventilation control device for a tunnel according to an embodiment of the present invention and a structure of a road tunnel to which the device is applied. In the road tunnel 1 according to the embodiment of the present invention illustrated in FIG. 2, while a vehicle passing through the road tunnel 1 is moving while moving from the side of the well 1a toward the side of the well 1b, Ventilation wind for ventilating the road tunnel 1 also flows in the same direction as the movement of the automobile.

In FIG. 2, below the road surface on the side of the wellhead 1a of the road tunnel 1 that penetrates the mountain (or hill) 25 in the left-right direction in FIG. 7) is provided. On the other hand, at a suitable portion above the road surface in the vicinity of the wellhead 1b of the tunnel 1, pollution concentration detecting means, that is, a fume transmittance meter (also referred to as "VI meter") 11
And pollution concentration detection means, that is, carbon monoxide concentration system (“CO meter”)
(Also called) 13 is provided. In a mountain (or hill) 25 corresponding to a substantially central portion between the well 1a and the well 1b of the road tunnel 1, the road tunnel 1 and the outside are substantially perpendicular to the road tunnel 1. A vertical shaft 4 that communicates with each other is formed. The vertical shaft 4 is divided into an intake passage 4a and an exhaust passage 4b, a ventilator or blower 6 is provided on the intake passage 4a side, and a ventilator or blower 5 is provided on the exhaust passage 4b side. .

In the vicinity of the opening of the exhaust passage 4b in the road tunnel 1, a fume transmittance meter, that is, a VI meter 9, a carbon monoxide concentration meter, and a loss CO meter 12 are provided. In the substantially central portion between the wellhead 1a and the exhaust passage 4b in the road tunnel 1,
A ventilator, that is, a first dust collector 2 is arranged, and a VI meter 8 is arranged in the vicinity of the first dust collector 2. A ventilator, that is, a second dust collector 3 is also disposed in a substantially central portion between the wellhead 1b and the intake passage 4a in the road tunnel 1, and a VI meter 10 near the second dust collector 3 Is provided.

VI total 8 ~ 11 mentioned above, CD total 12,13 and traffic detector TC7
Respectively output detection signals to the ventilation control device 14, and the first dust collector 2, the second dust collector 3, the exhaust fan 5 and the blower 6
Are placed under the control of the ventilation control device 14 and each operation is controlled.

FIG. 1 is a block diagram showing a functional configuration of a tunnel ventilation control device according to an embodiment of the present invention and peripheral devices thereof.

In FIG. 1, a traffic volume detector TC7 detects a vehicle passing through the road tunnel 1 into a large vehicle and a small vehicle,
The 5-minute integrated value of the number of passing vehicles is output to the traffic volume predicting unit 15 which constitutes the ventilation control device 14 surrounded by the broken line in FIG. The haze transmittance meters 8 to 11 detect the pollutant concentration of air in the road tunnel 1 at each installation location, that is, the haze transmittance (also referred to as "VI value"), and configure the ventilation control device 14 by changing the combination. Output to the determination unit 19.
The carbon monoxide concentration meters 12 and 13 detect the pollution concentration of the air in the road tunnel 1 at each installation location, that is, the carbon monoxide concentration (also referred to as “CO concentration”), and output it to the combination change determination unit 19. It is like this. In addition to the first dust collector 2, the second dust collector 3, the exhaust fan 5, and the blower 6 are provided with air volume detection means for detecting and outputting the air volume from each of these ventilators. The output signals from the respective air flow rate detecting means are output to the combination change determining section 19 described above.

The traffic volume prediction unit 15 receives the 5-minute integrated value data of the number of passing vehicles output from the traffic volume detector 7, and further 1
The hourly traffic is accumulated and the hourly traffic volume (vehicle / h) is obtained, and the hourly traffic data (vehicle / h) for the past month is stored. The traffic volume prediction unit 15 is based on the previously stored hourly traffic volume data (vehicles / hour) for the past month in order to set a basic pattern of traffic volume prediction of vehicles passing through the tunnel 1.
It is designed to calculate the average value of passing traffic for the past month in hourly units. Since the fluctuation pattern of the traffic volume of the vehicles passing through the tunnel 1 varies depending on the day of the week, the calculation of the average value by the traffic volume prediction unit 15 is divided into weekdays, Saturdays, and holidays (Sunday and public holidays). Will be performed.

In the present embodiment, the traffic volume prediction by the traffic volume prediction unit 15 is performed in an hourly cycle, and the deviation from the average value is predicted every hour by an autoregressive model as described below.

ΔNYK + 1 = A0 · ΔNK + A1 · ΔNK-1 + A2 · ΔNK-2 …… (1) ΔNK = NK-NHK …… (2) where A0 to A2: coefficient, ΔNK: average of measured traffic volume at the Kth time Deviation from the value (vehicle / h), NK: Kth measured traffic volume (vehicle / h), NHK: Kth average traffic volume (vehicle / h)
h).

From the above contents, the traffic volume prediction value 1 hour ahead from the Kth time NY
K + 1 will be calculated by the following equation (3).

NYK + 1 = NHK + 1 + ΔNYK + 1 (3) (where NH K + 1: K + 1 average traffic volume (vehicle /
h). ) In addition, the traffic volume prediction by the traffic volume prediction unit 15 described above is
It is conducted for each large vehicle and each small vehicle. Further, the coefficients A0 to A2 of the autoregressive model are obtained by sequential learning by the Kalman filter.

The mode of the above-mentioned traffic volume prediction by the traffic volume prediction unit 15 is
The horizontal axis represents time (h) and the vertical axis represents traffic volume (vehicles / h), as shown in Fig. 3. FIG. 3 shows a method of traffic volume prediction by the traffic volume prediction unit 15,
● indicates the average traffic volume, which is the basic data for traffic volume prediction, and is the average value for the past month, × indicates the measured traffic volume, and ○ indicates the predicted traffic volume.

Ventilator operation combination selection unit 16, the traffic volume data predicted by the traffic volume prediction unit 15 through the process as described above,
For example, a combination selection table as shown in FIG. 4 is read from the combination selection table storage unit 17, and the combination of the ventilation units to be operated from the first dust collector 2 to the blower 6 is selected based on the read combination selection table. The combination number correspondence table shown in FIG. 5 stored in the previous term storage unit 17 is selected and output. In the present embodiment, the fourth combination stored in the combination selection table storage unit 17
The combination selection table shown in the figure
(Vehicle / h) increments, the large vehicle mixture rate is divided into 10 (%), and the numbers (combination numbers) in the table represent the operating combinations of the above-mentioned ventilation machines. The traffic volume and the large vehicle mixture rate shown in FIG. 4 are expressed by the following equations. Traffic volume = number of large vehicles + number of small vehicles, mixture rate of large vehicles = (number of large vehicles / traffic volume) x 100. The combination number correspondence table shown in FIG. 5 stored in the combination selection table storage unit 17 shows the correspondence between the combination numbers 0 to 7 in FIG. 4 and the operating combinations of the ventilator. In the figure, ○ indicates a ventilator to be operated, and × indicates a ventilator to be stopped.

Based on the traffic volume predicted by the traffic volume predicting unit 15 and the ventilation operation combination selected by the ventilation operation combination selecting unit 16, the ventilation standard air flow calculating unit 18 calculates the tunnel 1
Calculate the air volume required for each ventilation unit selected in the previous period to maintain the air pollution level in the room below the preset allowable value. When the ventilator reference air volume calculation unit 18 calculates the air volume of each ventilator in the manner as described above, a method is adopted that minimizes the power consumption required to operate each of these ventilators. . In other words, as described below, the formulation is performed as an optimization problem, and the air volume is obtained by the nonlinear programming method.

(1) Variables X1: First dust collector air volume (m ³ / sec), X2: Second dust collector air volume (m ³ / sec), X3: Exhaust air volume (m ³ / sec), X4: Blower air volume (m ³ / sec), X5: Roadway airflow from shaft 4 to shaft mouth 1a side (m ³ / sec), X6: Roadway airflow from shaft 4 to shaft mouth 1b side (m ³ / sec) (2) Objective function F = W1 (X1) + W2 (X2) + W3 (X3) + W4 (X4) → Minimize (4) Where, W1: power required to operate the first dust collector 2 (KW), W2: to operate the second dust collector 3 Power required (K
W), W3: Electric power (KW) required to operate the blower 5, W4:
Electric power (KW) required to operate the blower 6, W1 ~
W4 is a function.

(3) Inequalities constraint condition (a) Upper and lower limit constraints on air volume in the first dust collector 2 and the second dust collector 3 Qc1MIN ≤ X1 ≤ Qc1MAX ...... (5) Qc2MIN ≤ X2 ≤ Qc2MAX ...... (6) Where, Qc1MIN: 1st Minimum air volume of dust collector 2 (m ³ / sec), Q
c2MIN: Minimum air volume of second dust collector 3 (m ³ / sec), Qc1MAX: Maximum air volume of first dust collector 2 (m ³ / sec), Qc2MAX: Maximum air volume of second dust collector 3 (m ³ / sec) (b) Upper and lower limit of air volume in exhaust fan 5 and blower 6 QEMIN ≤ X3 ≤ QEMAX ...... (7) QBMIN ≤ X4 ≤ QBMAX ...... (8) Where, QEMIN: minimum air volume of exhaust fan 5 (m ³ / sec), QBMIN:
Minimum air volume of blower 6 (m ³ / sec), QEMAX: Maximum air volume of blower 5 (m ³ / sec), QBMAX: Maximum air volume of blower 6 (m ³ / s)
ec).

(C) Other restrictions on air volume X1 ≤ X5 ...... (9) X2 ≤ X6 ...... (10) X3 ≤ X5 ...... (11) X4 ≤ X6 ...... (12) (D) Soot concentration restriction CVI1 (NL, NS , X5) ≦ CVIMAX …… (13) CVI2 (NL, NS, CVI1, X1, X5) ≦ CVIMAX …… (14) CVI3 (NL, NS, CVI2, X3, X4, X6) ≦ CVIMAX …… (15) CVI4 (NL, NS, CVI3, X2, X6) ≦ CVIMAX …… (16) Where, CVIi: Soot concentration at the iVI meter (fume transmittance meter) installation point (−), NL: Number of large vehicles (unit / h), NS: number of small vehicles (unit / h), CVIMAX: soot concentration condition constraint (-). The above-mentioned CVI1 to CVI4 are functions, and there is the following relationship between the VI (soot transmittance) value and the soot concentration.

CVI = (-1/100) * log10 (VI / 100) (CVI: Soot concentration (-), VI: VI value (100m transmittance) (%) (e) Carbon monoxide (CO) concentration constraint CO1 (NL , NS, X5) ≦ CO MAX …… (17) CO2 (NL, NS, CO1, X3, X4, X6) ≦ CO MAX …… (18) where COi: iCO meter (carbon monoxide concentration meter) Installation point C
O (carbon monoxide) concentration (ppm), CO MAX: CO (carbon monoxide)
It is a concentration upper limit constraint (ppm), and CO1 and CO2 are functions.

(4) Equal constraint condition (a) Pressure balance ΔPt1 + ΔPt2 + ΔPm + ΔPr1 + ΔPr2 + ΔPc1 + ΔPc2 + ΔPB = 0 …… (19) ΔPt1 = f1 (NL, NS, X5) …… (19-1) ΔPt2 = f2 (NL, NS, X6) …… (19-2) ΔPm = f3 (Vn) …… (19-3) ΔPr1 = f4 (X5) …… (19-4) ΔPr2 = f5 (X6) …… (19-5) ΔPC1 = f6 (X1, X5) ...... (19-6) ΔPC2 = f7 (X2, X6) …… (19-7) ΔPB = f8 (X4, X6) …… (19-8) where ΔPt1: Well 4a from shaft 4 Ventilation power of (mmA
q), ΔPt2: Traffic ventilation capacity (mmA) from shaft 4 to wellhead 1b
q), ΔPm: Natural ventilation (mmAq), ΔPr1: From shaft 4
Road resistance on 1a side (mmAq), ΔPr2: Road resistance on 1b side from shaft 4 (mmAq), ΔPc1: Boosting force of first dust collector 2 (mmA)
q), ΔPc2: Boosting force (mmAq) of the second dust collector 3, ΔPB: Boosting force (mmAq) of the blower 6, Vn: Natural wind (m / sec), f
1 to f8 are functions.

(B) Air flow balance X5-X3 + X4 = X6 (20) In the above-mentioned nonlinear programming, the constraint conditions are shown (5) ~
The variables X1 to X6 that satisfy the expression (20) and minimize the expression (4) indicating the objective function are obtained. Nonlinear programming is
This is a generally known method and is described in the following documents, for example.

 Imano, Yamashita: Non-linear programming, published by JSGI 1978.

In addition, the soot and carbon monoxide (CO) concentration calculation formulas (shown by (13) to (18) formulas) and pressure calculation formulas ((19-1) to (19-8) formulas described above are used. Are described in, for example, the following documents.

Japan Road Association: Road Tunnel Technical Standards (Ventilation) / Commentary, published by Japan Road Association in 1985.

The combination change determination unit 19 includes a smoke transmittance (VI value) output from the smoke transmittance meters 8 to 11, and a carbon monoxide concentration meter 12,1.
Carbon monoxide (CO) concentration output from each of the three, the air volume detection value from the air volume detection means provided respectively corresponding to the first dust collector 2, the second dust collector 3, the exhaust fan 5, and the blower 6 ( That is, the load (operating air volume) of the ventilation units 2, 3, 5, 6 in the previous period is read. The combination change determination unit 19 determines whether these read values satisfy the conditions stored in the combination change condition storage unit 20, and based on the determination, the ventilations 2, 3, 5, 6 Make a decision to change the operation combination. The determination of the condition for changing the operation combination of the ventilators 2, 3, 5, 6 by the combination change determining unit 19 is performed in 1-minute cycles after the operation combination of the ventilator is selected by the ventilation operation combination selecting unit 16. It is done for about a minute. If the change condition of the ventilation operation combination cannot be satisfied while this condition determination is being performed, the current combination is maintained until the ventilation operation combination selection unit 16 next selects the operation combination. Will continue to operate the ventilator.

Here, the ventilation combination change condition stored in the combination change condition storage unit 20 is as described below.

(1) When increasing the number of operating ventilators It is necessary to satisfy both of the following two conditions.

(A) The load of all the ventilators being operated is Lh (%) or more. (B) VIi ≤ VIi ^* + DVIi (i = 1 ... 4) (2) When decreasing the number of ventilators operating The following three conditions It is necessary to satisfy all.

(A) The load of all ventilators in operation is LL (%) or less, (b) VIi ≧ VIi ^* -DVI2 (i = 1 ... 4) (c) COi ≦ CO MAX-DCO (i = 1,2 ) Here, VIi: measurement value (fume transmittance) (%) by iVI meter (i-th haze transmittance meter), VIi ^* : installation point of i-th meter (first haze transmittance meter) VI (fume transmittance) target value (%), DVI1, DVI2: VI value (fume transmittance) margin (%), COi: iCO meter (i-th carbon monoxide concentration meter) Measured value (carbon monoxide concentration) (pp
m), COMAX: CO (carbon monoxide) concentration upper limit constraint (ppm), D
CO: This is the margin (ppm) for CO (carbon monoxide) concentration determination.

The combination change execution unit 21 receives the decision to change the operation combination of the ventilators 2, 3, 5, 6 by the combination change determination unit 19,
It actually starts and stops the ventilators 2, 3, 5, and 6. The combination change execution unit 21 starts each of the ventilators 2, 3, 5, and 6 by outputting a drive command signal to a drive circuit provided in each of the ventilators 2, 3, 5, and 6, Further, by outputting a drive stop command signal to each of the drive circuits, the operation of each of the ventilators 2, 3, 5, 6 can be stopped. When the combination change executing unit 21 receives the decision of the change of the operation combination of the ventilators 2, 3, 5, 6 by the combination change determining unit 19 and starts each of the ventilators, the ventilator reference air volume calculation unit 18 A blade angle command signal is output to a blade angle changing actuator that changes a blade angle of a fan included in each of the ventilators so that the air amount calculated by the above is used as an initial air amount from each of the ventilators.

After the ventilator has been driven through the process as described above, based on the measurement value by the VI meter (fume permeability meter) and the CO meter (carbon monoxide concentration meter), the air in the tunnel 1 VI value (fume transmittance) and CO concentration (carbon monoxide concentration)
Feedback control such as PI (proportional / integral) control is performed so that and are maintained within a preset allowable range.

In the present embodiment, the road tunnel 1 is described as a one-way traffic tunnel, but the present embodiment is naturally applied even if the road tunnel 1 is a two-way traffic tunnel, and the control function of the ventilation control device 14 described above is used. The configuration is exactly the same. Further, even when the number of ventilators and the types of ventilators are different from the present embodiment, the control function configuration of the ventilation control device 14 is exactly the same. However, when the road tunnel 1 is a two-way traffic tunnel, the traffic volume prediction unit 15 needs to predict bidirectional traffic volume.

In the present embodiment, the combination change determination unit 19
Is the air volume from each of the ventilators 2, 3, 5, and 6,
The detection signal from the air volume detection means provided for each of 3, 5, and 6 was used for recognition, but instead of the air volume detection means, the blade angle of the fan was detected for each ventilator. It is also possible to detect the air volume by providing a known blade angle detecting means for outputting a blade angle detection signal.

By variably adjusting the blade angle of the fan as described above, it is possible to continuously adjust the air volume from each of the ventilators 2, 3, 5, and 6.

〔The invention's effect〕

As described above, according to the present invention, when changing the combination of the ventilators to be operated based on the predicted traffic volume, the air volume of each ventilation after the combination change is calculated, Even when changing the operation combination, when the preset conditions regarding the pollution concentration and the ventilation load are satisfied, each ventilation is started with the calculated air volume based on the changed operation combination. Since it is stopped, it is possible to change the operation combination of the ventilator so that the pollutant concentration of the air in the tunnel does not worsen and conversely hyperventilation is caused, and thereby the pollutant concentration of the air in the tunnel is changed. It is possible to provide a ventilation control device for a tunnel capable of improving the control accuracy of the above and reducing the power consumption required for operating the ventilator.

[Brief description of drawings]

1 is a block diagram showing a functional configuration of a ventilation control device for a tunnel according to an embodiment of the present invention, and FIG. 2 is a ventilation control device for a tunnel according to an embodiment of the present invention and the device is applied. FIG. 3 is a schematic diagram showing the structure of a road tunnel, FIG. 3 is a diagram showing a method of predicting traffic volume in a ventilation control device for a tunnel according to an embodiment of the present invention, FIG. 4 and FIG. FIG. 6 is an explanatory diagram showing an example of a combination selection table related to a ventilation control device for a tunnel according to an embodiment of the present invention. 1 ... Road tunnel, 2 ... 1st dust collector, 3 ... 2nd dust collector, 4 ... Vertical shaft, 5 ... Fan, 6 ... Blower, 7 ...
… Traffic volume detector, 8-11 …… Fume transmittance meter (VI meter), 1
2,13 …… Carbon monoxide concentration meter (CO meter), 14 …… Ventilation control device, 15 …… Traffic volume prediction unit, 16 …… Ventilator operation combination selection unit, 17 …… Combination selection table storage unit, 18 ...... Ventilator standard air volume calculation unit, 19 ...... Combination change determination unit, 20 …… Combination change condition storage unit, 21 …… Combination change execution unit.

Claims (1)

(57) [Claims] 1. The inside of the tunnel based on an output signal from a pollution concentration detecting means for detecting a pollution concentration of air in the tunnel and an output signal from a traffic volume detecting means for detecting a passing traffic volume in the tunnel. In a ventilation control device for a tunnel that controls a plurality of ventilators installed to ventilate the air, the traffic volume that predicts the traffic volume based on the past traffic volume data detected by the traffic volume detection means. A prediction unit, a combination selection table storage unit that stores a ventilation operation combination selection table corresponding to the traffic volume, and a candidate for the ventilation operation combination based on the traffic volume predicted by the traffic volume prediction unit. Combination selection table The ventilation operation combination selection section selected from the combination selection table stored in the storage section and the ventilation operation combination selection section change the ventilation operation combination. The ventilation standard air flow rate calculation unit that calculates the air flow rate of each ventilation system after the change of the ventilation condition, and the conditions regarding the pollution concentration and the ventilation load that the ventilation operation combination selection unit must meet when changing the ventilation operation combination. And a combination change condition storage unit for storing the combination change condition storage unit, and whether or not the output signal of the pollution concentration detection means and the load of the ventilator satisfy the conditions stored in the combination change condition storage unit to determine the combination change. Combination change decision unit and ventilation start-up
A ventilation control device for a tunnel, comprising: a combination change execution unit that stops the operation and actually changes the operation combination.