Operational Face And Filter Velocities

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Course Textbook

Godish, T., Davis, W. T., & Fu, J. S. (2015). Air quality (5th ed.). Boca Raton, FL: CRC Press.

Our course project will be to develop a document titled A Permit By Rule (PBR) Application for an Interior Surface Coating Facility that will serve as a simulation of our work as a contract environmental engineer to a small vehicle body shop located in the state of Texas.

The Scenario:

You have been contracted with a vehicle body repair shop named Texas Car Body Repairs, USA to engineer and write a state (Texas) air permit application for a carefully designed interior lining (painting) facility. According to Texas state laws and EPA laws, the facility must have an air permit before construction begins. Once the facility is completed, the construction air permit will then become the operational air permit for the facility. As a result, your client wants the air permit application to automatically align the interior surface coating facility into operational compliance with state and federal air quality laws. Consequently, it is extremely important for you to write the air permit application to meet the air permit criteria using the state guidance document and considering the equipment and chemicals already planned for the facility operations.

Your client has presented you with the following specifications regarding the facility operations plan:

Interior Liner Coating Material 10 gallons coating/vehicle 2 gallons of solvent/vehicle
Vehicle Lining Application Apply interior liners to two (2) vehicles/day Work five (5) hours/day and four (4) days/week Vehicle Lining Curing
Vehicle Lining Curing Cure interior liners of two (2) vehicles/day Work five (5) hours/day and four (4) days/week
Interior Liner Cure Heater fuel source is natural gas-fired drying oven Heater generates 2.1 million (MM) Btu/hr at maximum 2,500 hrs/year

 
Vehicle Lining Design Cross-draft air plenum Vehicle interior is the spray area
Exhaust Fan 10,000 ft3/min (CFM) 1 exhaust fan
Air Makeup Unit 5760 ft3/min (CFM) 1 air makeup
Filter Openings 20.0 ft2 each Two (2) filter openings
Coating WV VOC content 2.8 lb/gal coating Coating VM
Water Content

 

 Per gal/coating

 

 1.0 lb/gal
Water Density

 

 Per gal/water

 

 8.34 lb/gal
Coating VW

 

 Water volume

 

 Calculation
Exempt-solvent Content

 

 Per gal/coating

 

 0.5 lb/gal
Exempt-solvent Density

 

 Per gal/exempt solvent

 

 6.64 lb/gal
Coating Ves

 

 Exempt solvent volume

 

 Calculation

 

The client has designed an interior coating spray painting system that allows the interior of a vehicle to be coated (such as for new vehicles, or vehicles being restored after fire damage or other catastrophic interior damage). The operations will involve a stripped-down vehicle body being brought into the facility’s shop. The shop is a steel building with a finished concrete floor and a paint booth for each vehicle. The vehicle will be placed in the spray booth. The booth will be opened at one end of the booth for makeup air. The exhaust air will flow through an exhaust chamber at the other end of the vehicle (see Cross-Draft Automotive Spray Booth in Appendix F of the TCEQ Regulatory Guidance Document). For each vehicle, once the liner application operations are completed the forced curing (drying) operations will immediately commence.

Instructions:

Unit V Mini Project

As a continuation of our course project due in Unit VIII, A Permit By Rule (PBR) Application for an Interior Surface Coating Facility, complete the next section, “Operational Face and Filter Velocities,” of your proposal by following the instructions carefully, and then submit your continued draft for grading.

Instructions

1. Closely read the Required Reading assignment from your textbook, the TCEQ (2011) document, and the Unit Lesson in the Study Guide.

2. Open your proposal draft from Unit IV and make any improvements to your draft using your professor’s feedback from the Unit IV project assignment.

MEE 6501, Advanced Air Quality Control 5

3. Open the Unit V Study Guide, read the Unit V Lesson, then review the calculations demonstrated and explained regarding face velocity calculations and filter velocity calculations for our scenario.

4. Make your Unit V work your fourth level 1 heading titled “Operational Face and Filter Velocities.” Describe and demonstrate (illustrate) the calculations for the following for this section of your project: (a) calculate the face velocity and (b) filter velocity of the spray booth in a minimum one-page, double-spaced document.

 
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