Tropos 7.2

Copyright © 2008 Odotech Inc. Tropos is a trademark of Odotech Inc.

TROPOS 7.2

The advanced atmospheric dispersion

modeling software for odors


Tropos© 7.2• Reliable & Fast, Tropos

Impact© 7.2 MODELS THE ATMOSPHERIC DISPERSION OF ODORS.

• For Environmental Impact Studies of Atmospheric Pollutant Emissions & Odors.

• A range of Atmospheric Dispersion Models including the Gifford-Gaussian and Turner Models optimized for the atmospheric dispersion of odors.

In order to model odor dispersion, specifically adapted & validated models are necessary.


Modeling Framework• Import a map of the

target site in various graphic formats:– Image Bitmap Windows

(bmp)– Graphics Interchange

Format (gif)– Tag Image File Format

(tif)– Portable Network

Graphics (png)– CD Kodak Photo (pcd)

• Environment types of receptors modeled: rural, urban.

Aerial Map of Site


Meteorological Data

• Complete meteorological data management environment:

1. Import Text Files2. Edit Data3. Display Wind & Stability Roses

Meteorological Data Editing

Wind Roses Display


Chemical Compound Assessed• Choice between :

1. Modeling specifically odors or2. Specifically a chemical

compound (selected from an incremental data base of 400 compounds and 5000 chemical synonyms)

• Chemical compounds from the data base can have the following thresholds:

1. Olfactory Perception2. Toxicity3. Explosiveness4. Flammability5. Exposure to Different Standards

Chemical Compound Selection


Sources• Different types of emission

sources:

1. Point2. Surface3. Linear

• Characterized by:

1. Physical Dimensions2. Height3. Flow Rate 4. Flow Surface Distribution5. Flow Rate Time Variation6. Emission Fluctuation over Time

(manual entry or .txt file import)

Parametrization of Sources


Receptors

• Different receptors, in order to target geographic areas of interest for atmospheric dispersion simulation:

1. Point2. Line3. Surface

• Characterization of receptors :

1. Dimensions2. Measuring Height

Definition of Receptors


Odor Atmospheric Dispersion• To measure odor, we measure its

perception by the human nose. The nose is excited by the fluctuations in concentration rather than by the mean concentration. Because of its sensitivity, the nose perceives the concentration peaks, which can often exceed the mean value.

• Models used for odor dispersion must thus also take into account the odor concentration peaks, and not only the mean concentration that most models estimate. It is particularly important to take into account the wind eddies responsible for turbulent diffusion.

Tropos Impact© contains the Gifford-Gaussian model developed by ODOTECH INC in order to accurately model the atmospheric dispersion of ODORS.

Combined Gifford-Gaussian Model


Atmospheric Dispersion Models

1) Gaussian Model

2) Gifford-Gaussian Model

3) Turner Model

4) MUC Model

5) Puff Model

Specificto Odors


Gaussian Model• The Gaussian Model is

one of the most widely used models in the world to study dispersion phenomena, notably by the EPA (Environmental Protection Agency). This model estimates pollutant concentrations at any point in space based on various factors:

1. Wind Speed & Direction2. Atmospheric Stability3. Mixing Height 4. Temperature

Gaussian Dispersion Plume


Gifford-Gaussian Model(Optimized for Odors)

• The Gifford-Gaussian Model is designed specifically for odor dispersion.

It takes into account:

– plume meandering and concentration fluctuation

– real perception of odors

Concentration (o.u./m3)

Gaussian

GiffordGifford-Gaussian

Meters


Turner Model(Optimized for Odors)• The Turner model

corrects the Gaussian model by converting the concentrations computed on a 60-minute time basis to a different time basis.

• This approach is used primarily for odor dispersion based on the commonly used peak-to-mean concentration method.


MUC Model

• The MUC (Montreal Urban Community) model comprises the four formulae specified in MUC By-Law 90 regarding the atmospheric dispersion of gaseous contaminants.

Simulation with MUC Model


Puff Model

• The Puff Model was designed to simulate instantaneous releases into the atmosphere.

This model is used to predict the impact of an accident (tanker truck, holding tank leak or broken pipeline) to allow effective emergency planning.

Puff Model Simulation


Plume Rise• Tropos Impact© 7.2 takes in account the

plume rise elevation by correcting the value of the stack height. In order to effectively evaluate this height, 3 models can be used:

1. U.S. Environmental Protection Agency (EPA)

2. Holland3. Montreal Urban Community (MUC)


Simulation Types

• Tropos Impact© 7.2 offers you multiple simulation types:

1. Hourly Maxima 2. Percentiles 3. Trigger Thresholds4. Mean

Concentrations5. Instantaneous

Concentrations


Simulation Results

• Personalize the display of your results

• Select and modify different display parameters.

Wind Roses at Receptor Point

Display Configuration


Simulation Reports• Automatically generate

simulation reports, exportable to text files

• Export your graphic results to bitmap files

Simulation Report

Export Graphic Results


Computer Requirements• Tropos Impact© 7.2 requires a computer

with the following characteristics:

For modeling odor atmospheric dispersion, Tropos Impact© 7.2 is unbeatable. Fast, effective, user-friendly, ... Modeling has never been this easy.

– Intel compatible processor (1 Ghz recommended)

– Windows 2000/XPOperating System

– 50 Mb hard disk space for the initial installation

– 32 Mb graphic card


Contact

• Odotech is a leading designer and producer of odor measuring and monitoring systems. Its services department carries out odor impact and related studies for municipalities, waste disposal operators, waste water treatment plants, and various industrial facilities, worldwide.

Odotech Inc.3333 Queen Mary Road, Suite 301Montréal (Québec) H3V 1A2CanadaPhone: (514) 340 5250Fax: (514) 340 [email protected]

Odotech SAS20 rue de la Villette69328 Lyon CedexFrancePhone : +33 (0) 4 26 68 51 56Fax : +33 (0) 4 26 68 51 57 [email protected]

http://www.odotech.com/

http://www.odotech.fr/

Date post:	24-May-2015
Category:	Technology
Upload:	odoscan
View:	1,027 times
Download:	0 times

Tropos 7.2

Technology