JP2002207002A - Atmospheric environment simulation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an atmospheric environment simulation system capable of estimating the position of a pollutant generation source by combining the measured value (actually measured data) of an atmospheric pollutant and a calculation result obtained by the numerical simulation of the diffusion distribution state of the pollutants. SOLUTION: A numerical value calculation processing part 15 performs the simulation of the diffusion distribution state of the pollutants using numerical value calculation data obtained on the basis of a selected simulation model, a fixed parameter, an analyzing condition and an adjusting parameter. A series of analyses displaying the simulation result and a map are repeatedly performed by the number of pollutant generation sources, and these results and the measured value of the atmospheric pollutants are used to estimate the position of the atmospheric polluting substance generation source according to a statistic technique by a generation source estimation means 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention combines the results of analyzing the distribution distribution of air pollutants due to the source of air pollutants with the actual measured values (measurement data) of the air pollutant concentration.
The present invention relates to an atmospheric environment simulation system that estimates the position of a source contributing to actual measurement data by performing data analysis using a statistical method and provides information for studying countermeasures.

[0002]

2. Description of the Related Art In recent years, environmental impact assessment has become important for improving the air environment and taking measures against air pollution, such as the establishment of the Environmental Assessment Law and the issuance of the ISO14000 series from the viewpoint of global environmental protection. Particularly in factories, power plants and combustion facilities that emit pollutants into the air environment, it is necessary to periodically monitor the environmental impact during operation, as well as during the planning and planning stages.

[0003] Conventionally, as a system for predicting the diffusion of pollutants from factories, power plants, combustion facilities, etc. that emit air pollutants, and displaying the prediction results on a display device, for example, JP-A-11-14531 is known. Is mentioned. Such prediction systems calculate the diffusion distribution of contaminants from the source.

[0004]

However, for example, from which of a plurality of sources the actually measured air pollutants are emitted, that is, from the measured value (actually measured data) of the pollutant concentration, the position of the pollutant source is determined. It was difficult to estimate such.

An object of the present invention is to estimate the position of a pollutant source by combining a measured value (actually measured data) of an air pollutant and a calculation result obtained by numerically simulating the state of diffusion distribution of the pollutant. An object of the present invention is to provide an atmospheric environment simulation system.

[0006]

According to the present invention, in order to achieve the above object, a plurality of sources of air pollutants are regularly set in a grid pattern on a display screen, and contaminants emitted from each source are set. A simulation model, fixed parameters and analysis conditions suitable for this simulation are selected based on the simulation condition data that simulates the diffusion distribution situation of the simulation, and a numerical simulation of the diffusion distribution situation is performed using the simulation condition data, and the actual measurement values in a similar environment Adjustment parameters are selected so that the error from (measured values) is small, and the diffusion distribution of contaminants is calculated using the selected simulation model, fixed parameters, analysis conditions, and numerical calculation data obtained based on the adjustment parameters. Run a numerical simulation of Estimate the source location of air pollutants by repeating a series of analyzes that display the results and maps for the number of sources and calculating the results and measured values of air pollutants using statistical methods And displaying it on a display device.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a configuration diagram of an atmospheric environment simulation system according to one embodiment of the present invention.

In FIG. 1, an atmospheric environment simulation system 10 is a combination of an input device 1 for inputting input data (simulation condition data) and an output device 2 such as a display or a printer for displaying and outputting analysis results. Model selection unit 11, database unit 12, input parameter tuning unit 13, input creation unit 14, numerical calculation processing unit 15, generation source estimation processing unit 16, display synthesis unit 1
7, data storage unit 18, visualization data selection processing unit 19,
It comprises a display processing unit 20.

The input condition 1 such as the type and release amount of the pollutant, the release position, the atmospheric conditions, etc. is input from the input device 1 to the model selection unit 11. The model selection unit 11 performs classification based on the input condition 3 based on the type and shape of the pollutant, the release position, the release condition, the atmospheric condition at the time of evaluation, the topographical condition of the evaluation point, and the like, and the database unit 12 By referring to the analysis case database 121, the law / guideline database 122, and the simulation model database 123 stored in, a simulation model 41 and a fixed parameter 42 that are optimal for the input condition 3 in the input condition selecting unit (A) 4. And the analysis condition 43 are selected.

The input condition selection unit (B) 5 is stored in the database unit 12 by the input parameter tuning unit 13 in order to improve the accuracy of the analysis result based on the input condition 3 and bring it closer to the actually measured value (measured value). The adjustment parameter 51 is selected with reference to the measured value database 124 and given to the input creation unit 14. The input creation unit 14 creates the numerical calculation input data 6 necessary for the simulation calculation of the numerical calculation processing unit 15 based on the selected conditions.

The numerical calculation processing unit 15 uses the numerical calculation input data created by the input creating unit 14 to numerically analyze physical phenomena over the entire range of the analysis target area from a built-in physical model by using a parallel calculation or other high-speed technique. Analysis is performed, and a high-precision numerical analysis result 151 of the entire target area is displayed and displayed by the display combining unit 1.
7 analysis result database 18 in the data storage unit 18
2 and sort and arrange them.

The display synthesizing section 17 comprises a data storage section 18 for storing data necessary for visualization, a visualization data selection processing section 19 for selecting data necessary for visualization, and a display processing section 20.

The data storage unit 18 has a map database 181 storing map data used as background data when displaying the analysis results, in addition to an analysis result database 182 storing the analysis results. Map database 181
Stores map data of various kinds of accuracy with respect to the entire range of the analysis target area.

The visualization data selection processing unit 19 includes the input device 1
The display processing unit 2 refers to the databases 181 and 182 of the data storage unit 18 based on the display condition 7 input from the
To 0, the display accuracy map data 201 and the display accuracy visualization physical quantity distribution data 202 suitable for the display conditions are selected and instructed. The display processing unit 20 performs a visualization process on the display accuracy map data 201 and the display accuracy visualization physical quantity distribution data 202 specified by the visualization data selection processing unit 19, and combines and displays the physical quantity distribution visualization data 203 to be drawn on the output device 2.
Create

In a series of operations up to this point, only a plurality of source positions of contaminants are regularly set in a grid in input condition 3, and a numerical calculation processing unit 151 is set for each source condition.
The calculation is repeatedly performed a plurality of times, and the calculation results of the plurality of times are stored in the analysis result database 182 of the data storage unit 18. Based on the plurality of calculation results at different contaminant source positions and the actually measured values (measured values) input in advance under the input condition 3, the source estimation processing unit 16 performs a calculation process using a statistical method, The most probable position is estimated as the generation source of, and the estimation result is stored in the analysis result database 182 again.

As described above, by inputting, from the input device 1, the positions of the contaminant generating sources regularly arranged in a grid pattern, the positions and concentrations where the contaminant concentrations are actually measured, and other input conditions, the input conditions 3 are used. Numerical calculation processing unit 1
5 to calculate the calculated value at the position where the pollutant concentration is actually measured from the plurality of calculation results, and compare the calculated value with the actually measured value (measurement data) of the pollutant concentration at the position. It can be easily estimated that the possibility of release from the source is high.

Further, the display condition 7 is displayed by the visualization data selection processing unit 19 on the display accuracy visualization physical quantity distribution data 202 and the display accuracy map data 201 according to the display range, and on the source position coordinate data 204 and the display accuracy map data 201.
Can be combined and displayed.

Next, data stored in the database unit will be described.

FIG. 2 shows an example of data stored in the law / guideline database 122.

FIG. 2A shows a law / guideline database 12.
2 shows an example. The law / guideline database 122 has information classified into a law / guideline name 1221, an environmental item 1222, an analysis target field 1223, a region 1224, and a model 1225, and is configured from a correspondence table 1226 indicating a relationship between these. The correspondence table 1226 quantifies not only the relationship between the respective information but also its importance. In this case, the significance is represented by double circles, circles, and triangles.

FIG. 2B shows an analysis case database 121.
An example is shown below. The analysis case database 121 includes emission source information 1211, a model 1212, a diffusion parameter 12
13. Correspondence table 121 showing the information obtained by classifying various conditions used for the analysis of the effective chimney height 1214 and the like, and the relationship between them.
5 is comprised.

The model selecting section 11 of the atmospheric environment simulation system 10 stores these databases 121 to 123
By using the above, a law, a guideline or a model to be referred to is selected from environmental items and analysis targets according to the input condition 3, and values such as an effective stack height and a diffusion parameter are selected from past calculation examples.

Next, the processing operation of the input parameter tuning unit 13 will be described with reference to the model selecting unit 11 and the database unit 1.
2 will be described with reference to the flowchart of FIG.

The input condition 3 input from the input device 1 is given to the model selecting section 11, and the input condition A is selected (step S1). The selected input condition A is applied to the input parameter tuning unit 13. The input parameter tuning unit 13 prepares for a numerical simulation based on the condition A (step S2), and transmits necessary information to the input creating unit 14 and the numerical calculation processing unit 15 for processing from input data creation to numerical simulation. (Step 131). This processing 131 is called input data creation and numerical simulation processing in FIG.

The details of the process 131 will be described with reference to the flowchart of FIG.

The input data creation and numerical simulation section 131 instructs the input creation section 14 on the selected input condition A (step S3), and creates input data for a numerical simulation (step S4). This data for numerical simulation is different from the input condition 3 input by the analyst, and physical data that can be handled by numerical simulation, for example, the atmospheric state is converted from an index indicating a weather condition such as atmospheric stability into diffusion parameters in the horizontal and vertical directions. It was done.

Next, the input data is instructed to the numerical calculation processing unit 15 (step S5), a simulation calculation is performed (step S6), and the simulation result is output as a selected input condition result.

Returning to FIG. 3, the input data tuning unit 13
Will be described.

As described with reference to FIG. 4, an input condition A simulation analysis result is obtained as a processing result of the input data creation and numerical simulation processing section 131. Also,
The input condition tuning unit 13 receives the input condition 3 and the measured value database 12 of the database unit 12.
4 to retrieve a measurement value and a measurement condition corresponding to the input condition A (step S8), and create data of the measurement value and the measurement condition 133.

The input parameter tuning unit 13 compares the analysis result with the measured value based on the previously obtained input condition A simulation analysis result 132 and the measured value and the measurement condition 133 (step S9), and sets parameters for sensitivity analysis. Is selected and tuned (step S10). The parameters for the sensitivity analysis include, for example, a horizontal diffusion parameter σy, a vertical diffusion parameter σz, and a correction coefficient.

Next, the parameters are changed, input data is created, and a numerical simulation (process 131) is performed. An error is obtained from the result (step S11), and it is determined whether or not the error is minimum by using a least square method or the like (step S11). Step S
12). As a result, if it is not the minimum, the value of the parameter is tuned (step S10), and the processing from step S10 to step S12 is similarly executed repeatedly. When the error is minimized, the parameter is given to the input data creating unit as the processing result of the input condition (B) 5 (step S13).

As described above, the input parameter tuning unit 13 can select the adjustment input parameter so as to match the actually measured value in a similar environment, and a more accurate numerical simulation can be performed.

Next, the processing operation of the source estimation processing unit 16 will be described with reference to the flowchart of FIG. 5 in association with the input condition 3, the numerical calculation processing unit 15, and the analysis result database 182.

From the input device 1, n source positions (coordinates) arranged in a grid as input conditions 3 and measured values (actually measured data) of contaminants at one or a plurality of locations
(Step S1). Based on the input condition 3, the numerical calculation processing unit 15 performs a numerical simulation on each of the n sources (step S2), and stores the analysis result in the analysis result database 182.

From the numerical simulation results for each of the n source positions, the contaminant concentration at the position where the measured value (actually measured data) is present is calculated (step S3), and the analysis result at the position where the measured value (actually measured data) is present Finding the coordinates of the grid point that minimizes the sum of squares of the difference between
This is estimated to be a source of pollutants. Next, the estimated contaminant source position is converted into source position visualization data of the display processing unit 20, and displayed on the output device 2 together with the display accuracy map data.

[0037]

According to the present invention, a model and an input parameter suitable for an analysis condition can be automatically set, a numerical simulation can be performed without an advanced knowledge and experience of an analyst, and a measured value can be obtained. It is possible to estimate from which source the (measured data) is due to the pollutants released.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is an example showing a format of a database.

FIG. 3 is an operation flowchart of an input parameter tuning unit.

FIG. 4 is an operation flowchart of input data creation and numerical simulation processing.

FIG. 5 is an operation flowchart of a generation source estimation process.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Input device, 2 ... Output device, 3 ... Input condition, 4 ... Input condition selection result A, 5 ... Input condition selection result B, 6 ... Numerical calculation input data, 7 ... Display condition 10 ... Atmospheric environment simulation system, 11 ... Model selection part, 12 ... Database part, 121 ... Analysis case database, 1211 ... Emission source information, 1212 ... Model, 1213 ... Diffusion parameter, 1214 ... Effective stack height, 1215 ... Correspondence table, 12
2 Law / guideline database, 1221 Law / guide name, 1222 environmental item, 1223 analysis target field, 1
224 area, 1225 model, 1226 correspondence table,
123: simulation model database, 124
... Measured value database, 13 ... Input parameter tuning unit, 131 ... Input data creation, numerical simulation processing, 132 ... Input condition A simulation calculation result, 133 ... Measured value, measurement condition, 14 ... Input creation unit, 1
5 Numerical calculation processing unit, 151 Numerical analysis result of entire target area, 16 Source generation estimation unit, 161 Statistical processing of numerical analysis results of multiple sources, 17 Display synthesis unit, 18
Data storage unit, 181: Map database, 182: Analysis result database 19: Visualization data selection processing unit, 20: Display processing unit,
201: display accuracy map data, 202: physical quantity distribution data for visualizing display accuracy, 203: physical quantity distribution visualization data, 204: source position coordinate data, 205: source position coordinate visualization data

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yumiko Miyoshi 3-2-1 Sachimachi, Hitachi-shi, Ibaraki F-term within Hitachi Engineering Co., Ltd. (reference) 2C032 HB03 HB05 HB15 HC27 5B050 AA00 BA17 CA07 EA19 FA02

Claims (2)

[Claims] 1. An input means for inputting simulation condition data for simulating a diffusion distribution state of pollutants emitted from a source of air pollutants, and respective data of analysis examples, laws and guidelines, simulation models and measured values. And a model selecting means for inputting the simulation condition data and selecting a simulation model suitable for the simulation, fixed parameters and analysis conditions from the database, and inputting the simulation condition data to obtain a numerical value of a diffusion distribution state. A parameter tuning means for performing a simulation and selecting an adjustment parameter such that an error from a measured value of the database storing actual measured values in a similar environment is reduced; and a model selected by the model selecting means. Numerical calculation processing means for performing a numerical simulation of the diffusion distribution state of the contaminant using a simulation model, fixed parameters, analysis conditions and numerical calculation data obtained based on the adjustment parameters selected by the parameter tuning means, Data storage means for storing analysis result data and map data by the numerical calculation processing means; and source information including at least the location of the source based on the calculation results by the numerical calculation processing means and the actually measured value data of the pollutant. An atmospheric dispersion simulation system comprising: a source estimating unit for estimating; and a display processing unit for displaying a calculation result by the numerical calculation processing unit, a map based on the map data, and a source position on a display device. 2. A method according to claim 1, wherein said source estimating means inputs the position, release time, and release amount of the pollutant source by said input means, and diffuses said contaminant using said numerical calculation processing means. Estimate the location of pollutant sources by calculating the results of a numerical simulation of the distribution situation multiple times using the location of the pollutant source as a parameter, and using the statistical method to analyze the data together with the actual measured values of the pollutant concentration. An atmospheric environment simulation system characterized by the following.