CALCULATION OF TOTAL LOADS
Total loads from different subprocesses and environment (building) to the ventilated enclosure are calculated using design tools (heat, humidity, impuri-
Ties). Loads usually are time dependent, which has to be taken into account. See Fig. 3.11.
Explanations of Fig. 3.11
Step I: Loads to General Ventilation System
Loads from different sources to the general ventilation system are determined taking into account local protection.
Step 2: Total Loads
Calculate total loads, taking into account the time dependence of the loads.
Step 3: Check for a Source That Has Governing Role to Total Loads
• Check whether there is some single source that alone produces most of the loads.
• If you are calculating the loads at first, there might not be a need to reconsider at this stage.
• If the answer is yes,
• If construction is the main source, return to Building Layout and Construction and reconsider whether there is something that can be changed in building construction to reduce loads.
• Reconsider the target levels of local zone to reduce emission of a single source.
• If the answer is no, reconsider the target levels of the main zone (general ventilation), if loads cannot be reduced.
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