A control method for lighting linkage ventilation energy-saving system of full longitudinal jet ventilation tunnel

Abstract

The present invention relates to the field of tunnel ventilation design, and particularly to a control method for an illumination-linked ventilation energy-saving system of a fully longitudinal jet ventilation tunnel. It includes: S1. Input K i and K m into the ventilation energy-saving control system; S2. Calculate: #imgabs0# to obtain K P1 ; S3. Calculate: #imgabs1# If K ≤ K1, take K as the allowable smoke design concentration. If K > K1, execute S4; S4. Calculate: #imgabs2# If MaxTi ≤ Lk * Km, take K as the allowable smoke design concentration. If MaxTi > Lk * Km, then execute S5; S5. Calculate: #imgabs3#.

Description

Technical Field

[0001] The invention relates to the field of tunnel ventilation design, and in particular to a lighting linkage ventilation energy-saving system control method for a full longitudinal jet ventilation tunnel. Background Art

[0002] Highway tunnels are special sections of highways and are semi-enclosed environments. To ensure driving safety in tunnels and provide drivers and passengers with a relatively ideal driving environment, highway tunnels of a certain size need to be equipped with mechanical and electrical facilities such as ventilation and lighting.

[0003] The function of the highway tunnel ventilation system is to dilute the atmospheric pollutants emitted by cars into the highway tunnel. The pollutants in automobile exhaust mainly include CO and smoke. Smog in the atmosphere will have an adverse effect on tunnel driving safety. The greater the smoke concentration, the lower the visibility in the tunnel, and the greater the threat to driving safety. Therefore, highway tunnels with a certain length and traffic volume must be equipped with ventilation systems. For a considerable number of these tunnels, smoke is the decisive factor in the scale of the ventilation system.

[0004] The commonly used mechanical ventilation method in my country's highway tunnels is longitudinal ventilation. For highway tunnels below 3 km, full longitudinal jet ventilation is usually used. The pollutant concentration distribution characteristic of the full longitudinal jet ventilation tunnel is a linear increase from the fresh air inlet to the polluted air outlet of the tunnel (Table 4-1, 4-2 of "Highway Tunnel Ventilation Design Regulations JTG TD70 2-02-2014"), and tunnel mechanical ventilation consumes a lot of electricity. Under the same other conditions, the energy consumed by ventilation depends on the ventilation wind speed. The wind speed and energy consumption of the ventilation system are in a cubic relationship. That is, if the wind speed is doubled, the energy consumption will be eight times the original.

[0005] The ventilation speed depends on the required ventilation volume and the cross-sectional area of ​​the tunnel. The relationship between the three is:

[0006]

[0007] Where W is the wind speed, Q req is the required air volume for ventilation, and S is the cross-sectional area of ​​the tunnel.

[0008] The required air volume for ventilation depends on two parameters. One is the pollutant emission in the tunnel, and the other is the design concentration of pollutants (the maximum concentration of pollutants allowed to be discharged from the tunnel air. For a full longitudinal jet ventilation tunnel, it is the pollutant concentration at the polluted air outlet). Taking smoke as an example, the calculation formula for the required air volume for diluting smoke is:

[0009]

[0010] Where Qreq(VI) The required air volume for diluting smoke, Q VI is the smoke emission of the tunnel, and K is the smoke design concentration. ("Highway Tunnel Ventilation Design Regulations JTG TD70 2-02-2014") Obviously, under the same pollutant emission, the lower the pollutant design concentration, the greater the required air volume provided by the ventilation system, and the air volume is equal to the wind speed multiplied by the cross-sectional area of ​​the tunnel, that is, the greater the air volume, the corresponding wind speed will increase linearly. And the corresponding energy consumption will rise sharply.

[0011] It can also be seen from the above formula that the physical meaning of K is the average smoke content in the volume space.

[0012] The smoke design concentration indicates the degree of smoke pollution to the air. It is determined by measuring the smoke light transmittance within a certain distance Lk (100m as specified in the "Highway Tunnel Ventilation Design Detailed Rules JTG TD70 2-02-2014") of the polluted air, also known as the 100m transmittance, which is an indicator of visibility in the tunnel. See the explanation of Article 5.2.1 of the "Highway Tunnel Ventilation Design Detailed Rules JTG TD70 2-02-2014".

[0013] The current "Highway Tunnel Ventilation Design Detailed Rules JTG TD70 2-02-2014" recommends the same smoke design concentration for any ventilation method. However, the "Highway Tunnel Ventilation Design Detailed Rules JTG TD70 2-02-2014" also points out that the allowable smoke design concentration of a highway tunnel is related to the brightness inside the tunnel. When other conditions are the same, if the average brightness of the road surface is higher, the allowable smoke design concentration can be correspondingly higher (Article 5.2.1 of the "Highway Tunnel Ventilation Design Detailed Rules JTG TD70 2-02-2014"). According to the definition of allowable smoke concentration, that is, if the smoke design concentration corresponding to the section with lighting standard B1 is K1, and the smoke design concentration corresponding to the section with lighting standard B2 is K2, then for a section of length Lk, the combination of (B1, K1) is equivalent to the combination of (B2, K2). Furthermore, for (B2, K x ) combination, and accordingly a (B1,K y ) is an equivalent combination, and K y It can be determined according to the linear relationship:

[0014]

[0015] where k ’ is called the equivalence coefficient.

[0016] Obviously, the smoke concentration in the tunnel cannot be the same everywhere. In fact, according to the provisions of the "Highway Tunnel Ventilation Design Detailed Rules JTG TD70 2-02-2014", the smoke design concentration is actually the average smoke concentration index within the Lk range. The actual goal of tunnel ventilation is to ensure that within any length of Lk, the cumulative equivalent smoke content is not higher than the cumulative index of the average smoke concentration K within the Lk range under the middle section brightness standard.

[0017] According to the "Highway Tunnel Lighting Design Detailed Rules JTG TD70 1-02-2014", the lighting of highway tunnels is generally divided into enhanced section lighting and intermediate section lighting. The enhanced section lighting generally includes the entrance section, transition section and exit section. The brightness of the enhanced section lighting is generally much higher than that of the intermediate section lighting (Chapter 5 and 6 of the "Highway Tunnel Lighting Design Detailed Rules JTG TD70 1-02-2014").

[0018] The full longitudinal jet ventilation tunnel can take advantage of this situation and reasonably increase the smoke design concentration. This is because the polluted air outlet of the full longitudinal jet ventilation tunnel (located at the tunnel exit, the corresponding lighting is enhanced lighting) has a higher lighting brightness. However, this is not necessarily the case for other ventilation methods, because the polluted air outlet of other ventilation methods may be in the middle of the tunnel, which is located in the middle section of the lighting.

[0019] There are two main technical routes for existing highway tunnel ventilation energy-saving technologies.

[0020] The first is to improve the energy efficiency of ventilation equipment. Use fans that can achieve level 2 energy efficiency, level 1 energy efficiency, or even higher.

[0021] The second is to develop energy-saving ventilation controllers. The basic idea is to adjust the ventilation speed according to the measured value of the smoke concentration in the tunnel to achieve the goal of energy saving. Specific ventilation controllers include PID controllers, feedforward controllers, etc.

[0022] Regardless of the above technical route, the allowable smoke design concentration for tunnel ventilation is determined based on the lighting brightness in the middle section of the tunnel, without considering the energy-saving effect of higher lighting brightness on highway tunnel ventilation. Summary of the invention

[0023] The technical problem to be solved by the present invention is to provide a control method for the lighting-linked ventilation energy-saving system of a full longitudinal jet ventilation tunnel, dynamically adjust the allowable smoke design concentration of the tunnel, and realize energy-saving operation of the highway tunnel ventilation system.

[0024] The technical solution adopted by the present invention to solve the technical problem is: a lighting linkage ventilation energy-saving system control method for a full longitudinal jet ventilation tunnel, characterized by comprising the following steps:

[0025] S1. The brightness of each enhanced lighting segment at the polluted air outlet is recorded as B i , 1≤i≤N, the brightness of the middle lighting segment is recorded as B m , calculate B according to the corresponding relationship between the allowable smoke dust design concentration and the brightness in the tunnel i , the allowable smoke design concentration K corresponding to each enhanced lighting segment i , B m The corresponding allowable smoke design concentration K m , K i and K m Input ventilation energy-saving control system;

[0026] S2, the end point of the middle lighting section is P1, and the section from P1 to the polluted air outlet is the enhanced lighting section, with a total length of L H , the length of the entire tunnel is L, the length of the enhanced lighting section adjacent to P1 is L1, and its allowable smoke design concentration is K1;

[0027] Let: L' = LL H

[0028] The smoke concentration at point P1 is equal to K P1 As a benchmark, calculate the smoke concentration of each dividing point in turn:

[0029]

[0030] Locate the range of length Lk including point P1 where the light transmittance index of smoke is the most unsatisfactory.

[0031] Let the smoke light transmittance index in this range be Lk*Km, and calculate the smoke concentration K at point P1. P1 ;

[0032] S3. Calculation

[0033]

[0034] If K≤K1, K is used as the allowable smoke design concentration for the current tunnel ventilation. When the ventilation energy-saving control system detects that the smoke concentration is greater than or equal to K, the ventilation energy-saving control system increases the ventilation speed; when the ventilation energy-saving control system detects that the smoke concentration at the tunnel exit is less than K, the ventilation energy-saving control system reduces the ventilation speed;

[0035] If K>K1, execute step S4;

[0036] S4. For 1≤i≤N, locate the range of length Lk including point Ei where the smoke light transmittance index is the most unsatisfactory, and calculate the smoke light transmittance index of the corresponding range, recorded as Ti, and find the maximum MaxTi in Ti. If MaxTi≤Lk*Km, calculate the value of the following formula:

[0037]

[0038] Take K as the allowable smoke design concentration of the current tunnel ventilation. When the ventilation energy-saving control system detects that the smoke concentration is greater than or equal to K, the ventilation energy-saving control system increases the ventilation speed. When the ventilation energy-saving control system detects that the smoke concentration at the tunnel exit is less than K, the ventilation energy-saving control system reduces the ventilation speed.

[0039] If MaxTi>Lk*Km; then execute S5;

[0040] S5. Calculate the value of the following formula:

[0041]

[0042] Take K as the allowable smoke design concentration for the current tunnel ventilation. When the ventilation energy-saving control system detects that the smoke concentration is greater than or equal to K, the ventilation energy-saving control system increases the ventilation wind speed. When the ventilation energy-saving control system detects that the smoke concentration at the tunnel exit is less than K, the ventilation energy-saving control system reduces the ventilation wind speed.

[0043] Furthermore, in step S2, the value of Lk is 100m.

[0044] The beneficial effects of the present invention are as follows: the present invention rationally utilizes the relationship between the tunnel lighting brightness and the allowable smoke design concentration of the highway tunnel, dynamically adjusts the tunnel's allowable smoke design concentration according to the dynamic changes in the brightness of the tunnel's enhanced lighting section, and realizes energy-saving operation of the highway tunnel ventilation system. The technical solution of the present invention meets the current industry design standards, and the calculated tunnel ventilation allowable smoke design concentration is necessarily greater than the allowable smoke design concentration calculated by the currently commonly used method. The use of the technical solution of the present invention can reduce the energy consumed by the highway tunnel ventilation system, which is beneficial to energy conservation and carbon reduction, and can also save the operating costs of the highway. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for the application will be briefly introduced below; obviously, the drawings described below are only some embodiments recorded in the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1It is a schematic diagram of the relationship between the various sections of the tunnel of the present invention;

[0047] Figure 2 To enhance the schematic diagram of each lighting segment, the rising trend of smoke concentration is also indicated.

[0048] The reference numerals in the figure are: the total length from the fresh air inlet to the polluted air outlet is L; the allowable smoke concentration in the middle lighting section is K m , end point P1; at the pollutant exit end of the tunnel, after the middle section, there are N enhanced lighting sections (the farther these sections are from the middle section, the higher their lighting brightness, and the correspondingly higher allowable smoke concentration). These enhanced lighting sections are numbered in ascending order from the middle section to the tunnel exit, and the allowable smoke design concentration of these sections is Ki, and the length is Li, 1≤i≤N. The total length of all enhanced lighting sections is L H ; The end point (i.e., the dividing point) of each enhanced lighting segment is recorded as Ei.

[0049] The pollutant concentration distribution characteristic of the full longitudinal jet ventilation tunnel is a linear increase from the fresh air inlet to the polluted air outlet of the tunnel (Table 4-1, 4-2 of the "Highway Tunnel Ventilation Design Regulations JTG TD70 2-02-2014"). The arrow direction in the figure is the air flow direction from the tunnel entrance to the exit. According to the arrow direction, the smoke concentration behind the tunnel should be greater than the smoke concentration in the front. And the concentration is proportional to the distance from the fresh air inlet of the tunnel. Figure 2 The middle oblique line a represents the increasing trend of concentration. DETAILED DESCRIPTION

[0050] In order to make the invention better understood by those skilled in the art, the invention is further described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the invention, rather than all of the embodiments. In the absence of conflict, the embodiments of the invention and the features in the embodiments can be combined with each other.

[0051] A method for controlling a lighting linkage ventilation energy-saving system of a full longitudinal jet ventilation tunnel comprises the following steps:

[0052] S1. The brightness of each enhanced lighting segment at the polluted air outlet is recorded as B i , 1≤i≤N. The brightness of the middle lighting segment is recorded as B m , calculate B according to the corresponding relationship between the allowable smoke dust design concentration and the brightness in the tunnel i , 1≤i≤N corresponding to the allowable smoke design concentration K i , B m The corresponding allowable smoke design concentration K m , K i and K m Input ventilation energy-saving control system;

[0053] B i With B m The maximum value of K can be determined after the lighting installation plan is determined. In actual operation, it changes accordingly with the lighting control strategy of the tunnel at different times of the day. i and K m The corresponding calculation can be made by referring to the "Highway Tunnel Lighting Design Specifications JTG T D70 2-01-2014".

[0054] S2, the end point of the middle lighting section is P1. The section from P1 to the polluted air outlet is the enhanced lighting section, and its total length is L H According to the "Highway Tunnel Lighting Design Detailed Rules JTG TD70 2-01-2014", the enhanced lighting section may be composed of multiple sub-sections. The length of the enhanced lighting section adjacent to P1 is L1, and its allowable smoke design concentration is K1.

[0055] Let: L' = LL H

[0056] Calculate in sequence

[0057]

[0058] The smoke concentration at point P1 is equal to K P1 As a benchmark, calculate the smoke concentration of each dividing point in turn:

[0059]

[0060] The range of length Lk including point P1 where the light transmittance index of smoke is the most unsatisfactory is located.

[0061] The positioning method is:

[0062] At the beginning, the distance from point P1 to point L in the middle section k With point P1 as the left endpoint and point P2 as the right endpoint, this range is continuously moved toward the direction of enhanced lighting until P1 becomes the left endpoint and the section in which the integral value of total smoke light transmittance is the most undesirable is obtained during this process.

[0063] The specific method is to find the maximum value of the following integral:

[0064]

[0065] The above formula 1 is based on the distance L from point P1 in the middle segment. kFormula 1 is the integral formula of the total smoke light transmittance of the range when point P1 is the left endpoint and point P1 is the right endpoint; Formula 2 is the integral formula of the total smoke light transmittance of the range when the range moves toward the enhanced lighting direction so that part of it is located in the middle section and part of it is located on the enhanced lighting segment adjacent to P1, where the smoke concentration in the enhanced lighting segment is calculated as the equivalent concentration; Formula 3 is the integral formula of the total smoke light transmittance of the range when the range continues to move toward the enhanced lighting direction (but P1 is kept within the range) and the right endpoint has passed the enhanced lighting segment adjacent to P1. Move in this way until P1 becomes the left endpoint of the range. Find the maximum value of all the formulas, and let the smoke light transmittance index corresponding to the maximum value be Lk*Km, and find the smoke concentration K at point P1. P1 .

[0066] S3. Calculation

[0067]

[0068] If K≤K1 (this means that the smoke concentration of the entire enhanced lighting section increases according to the natural slope, and within any Lk distance, its cumulative equivalent smoke concentration is less than Lk*Km. The reason for calculating one step first here is that the subsequent calculations require a large number of integral operations. If this result can be confirmed here, the large number of calculations required by S4 can be avoided), then K is used as the allowable smoke design concentration for the current tunnel ventilation. When the ventilation energy-saving control system detects that the smoke concentration is greater than or equal to K, the ventilation energy-saving control system increases the ventilation wind speed. When the ventilation energy-saving control system detects that the smoke concentration at the tunnel exit is less than K, the ventilation energy-saving control system reduces the ventilation wind speed.

[0069] If K>K1, execute S4.

[0070] S4, for 1≤i≤N, locate the range with the worst light transmittance index of smoke, including point Ei, with a length of Lk (the positioning method is similar to step S2, except that the distance from point Ei to the middle section is Lk at the beginning). k As the left end point, and point Ei as the right end point, this range is continuously moved toward the direction of enhanced lighting until Ei becomes the left end point). And the smoke light transmittance index of the corresponding range is calculated, recorded as Ti.

[0071] Find the largest MaxTi among Ti.

[0072] If MaxTi≤Lk*Km (this means that the smoke concentration increases at a natural slope in the entire enhanced lighting section, and within any Lk distance, its cumulative equivalent smoke concentration is less than Lk*Km), then calculate the value of the following formula:

[0073]

[0074] K is used as the allowable smoke design concentration for the current tunnel ventilation. When the ventilation energy-saving control system detects that the smoke concentration is greater than or equal to K, the ventilation energy-saving control system increases the ventilation wind speed. When the ventilation energy-saving control system detects that the smoke concentration at the tunnel exit is less than K, the ventilation energy-saving control system reduces the ventilation wind speed.

[0075] If MaxTi>Lk*Km (this means that in the entire enhanced lighting section, the smoke concentration increases according to the natural slope, and its cumulative equivalent smoke concentration is greater than Lk*Km within any Lk range. MaxTi is the maximum value among these values ​​greater than Km. Then at this time, the ratio of Lk*Km to MaxTi should be multiplied based on the smoke concentration that increases according to the natural slope. This is sufficient to ensure that the cumulative equivalent smoke concentration is not greater than Lk*Km within any Lk range), execute S5.

[0076] In fact, as long as MaxTi≤Lk*Km is satisfied, it means that the smoke concentration of the entire enhanced lighting section increases according to the natural slope, and within any Lk distance, its cumulative equivalent smoke concentration is less than Lk*Km. Under this condition, the corresponding formula is the same, that is:

[0077]

[0078] The reason for step S3 is that the calculation of MaxTi requires a large number of integral operations, which is too computationally intensive. However, for some tunnels (generally those with longer lengths), the following conditions are met:

[0079]

[0080] If the above conditions are met, MaxTi≤Lk*Km will be satisfied.

[0081]

[0082] The reason why S3 is calculated one step ahead is that although the final K value calculation in this case uses the same formula, it can avoid the large amount of calculation required by S4.

[0083] S5. Calculate the value of the following formula:

[0084]

[0085] K is used as the allowable smoke design concentration for the current tunnel ventilation. When the ventilation energy-saving control system detects that the smoke concentration is greater than or equal to K, the ventilation energy-saving control system increases the ventilation wind speed. When the ventilation energy-saving control system detects that the smoke concentration at the tunnel exit is less than K, the ventilation energy-saving control system reduces the ventilation wind speed.

[0086] Embodiment 1:

[0087] A secondary highway tunnel, length L = 2167m, longitudinal slope is 0, clearance height is 7m, traffic volume is 180veh / h, design speed is 60km, sky area percentage is 10%, bright environment, lighting fixtures are LED, full longitudinal jet ventilation is adopted. According to "Highway Tunnel Ventilation Design Detailed Rules JTG / T D70 / 2-02-2014" and "Highway Tunnel Lighting Design Detailed Rules JTG T D70 2-01-2014", we can get:

[0088] K m =0.0065;

[0089] Brightness outside the cave: 3500cd / m 2 ; Lighting parking sight distance D s =56m;

[0090] Length of entrance 1:

[0091]

[0092] The length of the entrance 2 section is the same as the length of the entrance 1 section.

[0093] The design indicators of the length and lighting brightness of each section of the tunnel reinforcement section are as follows:

[0094] Segmentation Entrance section 1 Entrance section 2 Transition 1 Transition 2 Length(m) 28.0705 28.0705 44 67 <![CDATA[Illumination brightness (cd / m 2 )]]> 52.5 26.25 7.875 2.625

[0095] L H =28+28+44+67=167m.

[0096] L'=2000m, Lk=100m.

[0097] The design lighting brightness of the TR2 section (transition section 2) of the tunnel is 2.625>2.5. According to Table 5-2 of the "Highway Tunnel Ventilation Design Specifications JTG / T D70 / 2-02-2014", K1=0.0075;

[0098] Entrance section 1 Entrance section 2 Transition 1 Transition 2 i 4 3 2 1 <![CDATA[k i ’ ]]> 0.765 0.793 0.823 0.867 <![CDATA[K E (i)]]> <![CDATA[1.0835K P1 ]]> <![CDATA[1.0695K P1 ]]> <![CDATA[1.0555K P1 ]]> <![CDATA[1.0335K P1 ]]>

[0099] like Figure 1 P1 shown in the figure is the end point of the middle lighting section. N Point E1 is the end point of the enhanced lighting section adjacent to the middle section.

[0100] There are four possible situations for the range of length Lk including point P1:

[0101] 1) All located in the middle section.

[0102] At this time, the smoke light transmittance within the range of length Lk should be calculated as follows:

[0103]

[0104] 2) Part of it is located in the middle section and part of it is located in the transition section 2.

[0105] The length of the range in the middle section is d. At this time, the smoke light transmittance of the range with a length of Lk should be calculated as follows:

[0106]

[0107] After simplification, we get:

[0108]

[0109] After substituting various parameters, we get:

[0110] K p1 (-0.000033d 2 +0.09d+88.83333)

[0111] The above equation is a quadratic equation with a vertex value of 1350. When d < 1350, the function is monotonically increasing. Therefore, when d = L k The maximum value is 97.5K p1 .

[0112] 3) Part of it is located in the middle section, part of it is located in transition section 2, and part of it is located in transition section 1.

[0113] The length of the range in the middle section is d. At this time, the smoke light transmittance of the range with a length of Lk should be calculated as follows:

[0114]

[0115] After simplification, we get:

[0116]

[0117] After substituting various parameters, we get:

[0118] K p1 (-0.00044d 2 +0.13608d+87.32477)

[0119] The above equation is a quadratic equation with a vertex value of 1535.7. When d<1535.7, the function is monotonically increasing. Therefore, when d=L k -67=33, the maximum value is 91.767K p1.

[0120] 4) Part of it is located in transition section 2, and part of it is located in transition section 1.

[0121] Since this range must include P1, this range is in fact a special case of the third case when d = 0. From the above discussion, it can be seen that the smoke light transmittance in the fourth case must be better than that in the third case.

[0122] Combining the calculation results of the above four situations, it is easy to see that the smoke light transmittance index of the first situation is the most unsatisfactory.

[0123] make

[0124] 97.5K p1 =100Km

[0125] Calculated

[0126] K p1 =1.026Km

[0127] calculate

[0128]

[0129] The allowable smoke dust design concentration of the tunnel can be K = 0.007223.

[0130] According to Table 5.2.2.2 of "Highway Tunnel Ventilation Design Specifications JTG / T D70 / 2-02-2014", the allowable smoke design concentration is 0.0065;

[0131] 0.0065 / 0.007223=0.9

[0132] The corresponding tunnel ventilation wind speed is only 0.9 of the original design.

[0133] Since the motor power of the fan is equal to the product of air volume and wind pressure, and the air volume is proportional to the wind speed, and the wind pressure is proportional to the square of the wind speed, the corresponding motor power is proportional to the cube of the wind speed. That is, the corresponding ventilation energy consumption is only 0.9 of the original design. 3 =0.729, the energy saving rate can reach up to 27%.

[0134] Embodiment 2:

[0135] A secondary highway tunnel, length L = 817m, longitudinal slope of 0, headroom height of 7m, traffic volume of 180veh / h, design speed of 60km, sky area percentage of 10%, bright environment, LED lighting, full longitudinal jet ventilation. According to "Highway Tunnel Ventilation Design Detailed Rules JTG / T D70 / 2-02-2014" and "Highway Tunnel Lighting Design Detailed Rules JTG T D70 2-01-2014", we can get:

[0136] K m =0.0065;

[0137] Illuminated parking sight distance D s =56m;

[0138] Length of entrance 1:

[0139]

[0140] The length of the entrance 2 section is the same as the length of the entrance 1 section.

[0141] The design indicators of the length and lighting brightness of each section of the tunnel reinforcement section are as follows:

[0142] Segmentation Entrance section 1 Entrance section 2 Transition 1 Transition 2 Length(m) 28.0705 28.0705 44 67 <![CDATA[Illumination brightness (cd / m 2 )]]> 52.5 26.25 7.875 2.625

[0143] L H =28+28+44+67=167m, L R =67m.

[0144] L'=650m, Lk=100m.

[0145] The design lighting brightness of the TR2 section (transition section 2) of the tunnel is 2.625>2.5. According to Table 5-2 of the "Highway Tunnel Ventilation Design Specifications JTG / T D70 / 2-02-2014", K R =0.0075;

[0146] Entrance section 1 Entrance section 2 Transition 1 Transition 2 i 4 3 2 1 <![CDATA[k i ’]]> 0.765 0.793 0.823 0.867 <![CDATA[K E (i)]]> <![CDATA[1.26K P1 ]]> <![CDATA[1.21K P1 ]]> <![CDATA[1.17K P1 ]]> <![CDATA[1.1K P1 ]]>

[0147] First check point P1.

[0148] There are four possible situations for the range of length Lk including point P1:

[0149] 1) All located in the middle section.

[0150] At this time, the smoke light transmittance within the range of length Lk should be calculated as follows:

[0151]

[0152] 2) Part of it is located in the middle section and part of it is located in the transition section 2.

[0153] The length of the range in the middle section is d. At this time, the smoke light transmittance of the range with a length of Lk should be calculated as follows:

[0154]

[0155] After substituting various parameters, we get:

[0156] K p1 (-0.0001d 2 +93.3333)

[0157] The above equation is a quadratic equation with a vertex value of 0. When d>0, the function is monotonically decreasing. Therefore, when d=L k -67=33, the maximum value is 93.2K p1 .

[0158] 3) Part of it is located in the middle section, part of it is located in transition section 2, and part of it is located in transition section 1.

[0159] The length of the range in the middle section is d. At this time, the smoke light transmittance of the range with a length of Lk should be calculated as follows:

[0160]

[0161] After substituting various parameters, we get:

[0162] K p1 (-0.00014d 2 +0.05063d+91.7)

[0163] The above equation is a quadratic equation with a vertex value of 185.7. When d>0, the function is monotonically decreasing. Therefore, when d=L k -67=33, the maximum value is 93.2K p1 .

[0164] 4) Part of it is located in transition section 2, and part of it is located in transition section 1.

[0165] Since this range must include P1, this range is actually a special case of the third case when d = 0. From the above discussion, we can see that the light transmittance of smoke in the fourth case is 91.7K p1 .

[0166] Combining the calculation results of the above four situations, it is easy to see that the smoke light transmittance index of the second situation is the most unsatisfactory.

[0167] make

[0168] 93.2K p1 =100Km

[0169] Calculated

[0170] K p1 =1.073Km

[0171] calculate

[0172]

[0173] K>K1. Therefore, K cannot be directly used as the allowable smoke design concentration for the current tunnel ventilation. Instead, it is necessary to locate the range of length Lk including point Ei, where the smoke light transmittance index is the most unsatisfactory, for 1≤i≤N.

[0174] The range of length Lk including point E1 has the following six possible situations:

[0175] 1) Part of it is located in the middle section, and part of it is located in the transition section 2.

[0176] 2) Part of it is located in the middle section, part of it is located in transition section 2, and part of it is located in transition section 1.

[0177] 3) Part of it is located in transition section 2, and part of it is located in transition section 1.

[0178] 4) Part of it is located in transition section 2, part of it is located in transition section 1, and part of it is located in entrance section 2.

[0179] 5) Part of it is located in transition section 2, part of it is located in transition section 1, part of it is located in entrance section 2, and part of it is located in entrance section 1.

[0180] 6) Part of it is located in transition section 1, part of it is located in entrance section 2, and part of it is located in entrance section 1.

[0181] Since the ranges of the first and second cases must include point P1, and the calculation results for these two cases have been obtained, they will not be repeated.

[0182] For the third case, the length of the range located on the transition section 2 is d. At this time, the smoke light transmittance of the range with a length of Lk should be calculated as follows:

[0183]

[0184] After simplification, we get:

[0185]

[0186] After substituting various parameters, we get:

[0187] K E1 (-0.00003d 2 -0.07087d+88.01617)

[0188] The above equation is a quadratic equation with a vertex value of -1158. When d>0, the function is monotonically decreasing. Therefore, the function reaches its maximum value when d=100-44=56, which is 92.6K. p1 .

[0189] For the fourth case, the length of the range located on the transition section 2 is d. At this time, the smoke light transmittance of the range with a length of Lk should be calculated as follows:

[0190]

[0191] After substituting various parameters, we get:

[0192] K p1 (-0.00007d 2 -0.04034d+95.04242)

[0193] The above equation is a quadratic equation with a vertex value of -286.722. When d>0, the function is monotonically decreasing. Therefore, the function reaches its maximum value when d=100-44-28=28, which is 93.85771K. p1 .

[0194] For the fifth case, the length of the range located on the transition section 2 is d. At this time, the smoke light transmittance of the range with a length of Lk should be calculated as follows:

[0195]

[0196] After substituting various parameters, we get:

[0197] K p1 (-0.00008d 2 -0.00518d+94.07467)

[0198] The above equation is a quadratic equation with a vertex value of -33. When d>0, the function is monotonically decreasing. Therefore, the function reaches its maximum value when d=0, which is 94.07467K. p1 .

[0199] For the sixth case, since the total length of transition section 1 and entrance sections 1 and 2 is approximately 100 m, which is approximately equal to Lk, it is equivalent to a special case of the fifth case when d=0.

[0200] Obviously, there are:

[0201] MaxTi=94.07467K p1 >93.2K p1

[0202] So let:

[0203] 94.07467K p1 =100Km

[0204] According to Table 5.2.2.2 of "Highway Tunnel Ventilation Design Specifications JTG / T D70 / 2-02-2014", Km = 0.0065;

[0205] K p1 =0.0069

[0206]

[0207] The corresponding tunnel ventilation wind speed is only 0.748 of the original design.

[0208] Since the motor power of the fan is equal to the product of air volume and wind pressure, and the air volume is proportional to the wind speed, and the wind pressure is proportional to the square of the wind speed, the corresponding motor power is proportional to the cube of the wind speed. That is, the corresponding ventilation energy consumption is only 0.748 of the original design. 3 =0.42, the energy saving rate can reach up to 58%.

[0209] It can be seen from the above implementation methods and examples that, under the condition of meeting the design requirements of the highway tunnel ventilation design rules JTG / T D70 / 2-02-2014, the scheme of the present invention not only considers the lighting brightness of the middle section of the tunnel as the basis to determine the allowable smoke design concentration of tunnel ventilation, but also considers the energy-saving effect of higher lighting brightness on highway tunnel ventilation. Therefore, the present invention can reduce the energy consumed by the highway tunnel ventilation system, which is beneficial to energy saving and carbon reduction, and can also save the operating costs of highways.

[0210] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lighting linkage ventilation energy-saving system control method for a full longitudinal jet ventilation tunnel, characterized in that The following steps are included: S1. The brightness of each enhanced lighting segment at the polluted air outlet is recorded as B i , 1≤i≤N, the brightness of the middle lighting segment is recorded as B m , calculate B according to the corresponding relationship between the allowable smoke dust design concentration and the brightness in the tunnel i , the allowable smoke design concentration K corresponding to each enhanced lighting segment i , B m The corresponding allowable smoke design concentration K m , K i and K m Input ventilation energy-saving control system; S2, the end point of the middle lighting section is P1, and the section from P1 to the polluted air outlet is the enhanced lighting section, with a total length of L H , the length of the entire tunnel is L, the length of the enhanced lighting section adjacent to P1 is L1, and its allowable smoke design concentration is K1; Let: L' = LL H The smoke concentration at point P1 is equal to K P1 As a benchmark, calculate the smoke concentration of each dividing point in turn: Locate the range of length Lk including point P1 where the light transmittance index of smoke is the most unsatisfactory. Let the smoke light transmittance index in this range be Lk*Km, and calculate the smoke concentration K at point P1. P1 ; S3. Calculation If K≤K1, K is used as the allowable smoke design concentration for the current tunnel ventilation. When the ventilation energy-saving control system detects that the smoke concentration is greater than or equal to K, the ventilation energy-saving control system increases the ventilation speed. When the ventilation energy-saving control system detects that the smoke concentration at the tunnel exit is less than K, the ventilation energy-saving control system reduces the ventilation speed. If K>K1, execute step S4; S4. For 1≤i≤N, locate the range of length Lk including point Ei where the smoke light transmittance index is the most unsatisfactory, and calculate the smoke light transmittance index of the corresponding range, recorded as Ti, and find the maximum MaxTi in Ti. If MaxTi≤Lk*Km, calculate the value of the following formula: Take K as the allowable smoke design concentration of the current tunnel ventilation. When the ventilation energy-saving control system detects that the smoke concentration is greater than or equal to K, the ventilation energy-saving control system increases the ventilation speed. When the ventilation energy-saving control system detects that the smoke concentration at the tunnel exit is less than K, the ventilation energy-saving control system reduces the ventilation speed. If MaxTi>Lk*Km, then execute S5; S5. Calculate the value of the following formula: Take K as the allowable smoke design concentration for the current tunnel ventilation. When the ventilation energy-saving control system detects that the smoke concentration is greater than or equal to K, the ventilation energy-saving control system increases the ventilation wind speed. When the ventilation energy-saving control system detects that the smoke concentration at the tunnel exit is less than K, the ventilation energy-saving control system reduces the ventilation wind speed.

2. The lighting linkage ventilation energy-saving system control method of a full longitudinal jet ventilation tunnel according to claim 1 is characterized in that: In step S2, the value of Lk is 100m.

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