Figure 4: Sequential source allocation with Pinch-based methodology with
graphical representation, adapted from El-Halwagi et al. [9]
not reached (a triangle is formed). This also means the limiting
contaminant for the first sink is A (which is dependent on the source
sequence). Moving on to the second sink, the starting point for the
source CC (for contaminant B) after the first sink should be shifted
vertically upwards to account for the unfulfilled concentration limit
for the first sink – Figure 5b. Note that the ’triangle’ formed in
Figure 5a around Sink CC (contaminant B) is still feasible, as explained
in section 2.1. For the second sink, the limit for contaminant B is
reached, so the source CC for contaminant A after the second sink should
be shifted vertically downwards when the remaining is transferred to the
third sink – Figure 5c.