Hence,
saving in total utility consumption through process-toprocess
heat integration is not a promising option.
Alternatively, savings are expected to be in improving the
refrigeration levels. In the cold section, without changing
the configuration of compressors and chillers, the refrigeration
cycle is retrofitted by application of the Combined
Pinch & Exergy Analysis [21]. Thus 15% of the compressor’s
shaft work could have been avoided in a wellintegrated
design. The remaining questions are whether this
claimed benefit is practically applicable or not and also
which refrigeration levels should be modified.