M. Krajnc et P. Glavic, THE INFLUENCE OF DIFFERENT TEMPERATURE CONTRIBUTIONS ON HEAT-INTEGRATED PROCESS STRUCTURE, Chemical engineering research & design, 73(A8), 1995, pp. 880-888
Correct choice of the contributions (Delta(cont)T) to the minimum appr
oach temperature (Delta(min)T) are most important in processes with sm
all differences between the lowest and the highest temperatures of the
process. Temperature contributions in such processes have to be very
low. It has been found that fixed Delta(coat)Ts sometimes gave higher
energy targets than those derived from the simulated base process, In
such cases also, the location of available utilities and process units
against pinch temperature could be wrong. More realistic results were
obtained using an approach based on appropriate areic heat flow rates
, i.e. based on heat transfer areas. The best results came from indivi
dually calculated contributions for simulated heat exchange units.