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20 CHAPTER 3 DESIGN METHODOLOGY OF INDUSTRIAL AIR TECHNOLOGY
FIGURE 3.2 Decision tree of design process.
Correspondingly, when an existing industrial process is to be renewed, it
is sufficient to redesign only such subtasks of the design methodology that are
influenced by the change made. Naturally, this kind of procedure requires that
the original design and previous changes have been documented properly.
A decision tree for Design Methodology is illustrated in Fig. 3.2. Each
step in the tree is explained briefly below. The steps have also their own sub-
trees, which are described separately.
Explanations of Fig. 3.2
Step /: Given Data
Identify and collect data that depend only on the site location and that do not
change during the design process, such as outdoor conditions.
Step 2: Process Description
* Identify the industrial process and subprocesses.
* Identify possible emission sources, occupational areas, effects of
environmental parameters, needs for enclosure and ventilation
equipment.
