Page 57 - Industrial Ventilation Design Guidebook

22 CHAPTER 3 DESIGN METHODOLOGY OF INDUSTRIAL AIR TECHNOLOGY
Step 10: Selection of Equipment
* Work out performance characteristics to the equipment.
* Select acceptable equipment based on performance characteristics,
* Compare acceptable equipment in order to choose the most desirable one.
* Make a technical specification of selected equipment.

Step 11: Detailed Design
* Do detailed layout and dimensioning design.
* Design adjustment and control system.
* Consider special issues such as thermal insulation, condensation risks,
fire protection, and sound and vibration damping.
» Make commissioning plan.
Steps 12-14: Design of Conveying,
Cleaning and Discharge of the Pollutants
See details in Chapters 13 and 14.
Explanations of Back Couplings
BC I; Source Description —> Target Level Assessment
If some new agent is identified, the target level has to be defined for that
agent too.
BC 2: Local Protection —> Calculation of Local Loads
If the local protection has an effect on the exposure of the source, recalcu-
late the load.
BC 3: Local Protection —> Target Level Assessment
If defined target levels cannot be reached, reconsider target levels.

BC 4: Local Protection —> Process Description
Consider whether there is some process method to protect source/environ-
ment. In that case, return to process description. For example, if thermal insula-
tion is needed to reduce loads, consider what influence that has on the process
itself (Insulation may, e.g., lead to a need to change material of equipment),

BC 5: Calculation of Total Building Loads —> Target Level Assessment
* Consider whether some source has governing role to total loads. At least,
if returned from Selection of System, choose one of the two actions below.
* If some source has governing role over total loads, reconsider the target
level of that local zone in order to reduce loads.
* If there is no source that governs total loads, reconsider the target level
of main zones in order to reduce loads.
BC 6: Calculation of Total Building
Loads —> Building Layout and Structures
If building loads have governing role over total loads, reconsider whether
there is something that can be done with constructions (e.g., thermal insula-
tion) to reduce loads.