Subject index simultaneous

The RI can be scaled in terms of maximum expected uncertainties like the flexibility index. Then the RI would be an upper bound on the flexibility index, since the RI only considers uncertainties in each stream individually, while the flexibility index considers uncertainties in all streams simultaneously. However, for HENs it seems reasonable to assume that the uncertainty in each stream s supply temperature is roughly inversely proportional to that stream s heat capacity flow rate (i.e., that each stream is subject to roughly the same load uncertainty ). Thus the RI is calculated in terms of load uncertainty 81 or 8t, where... 

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