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Economic feasibility of heat pumps in distillation to reduce energy use
a b s t r a c t
An i-butane/n-butane mixture was selected to analyze several distillation assisted heat pump processes
when compared to conventional distillation. This conventional process, along with top vapour recompression,
bottom flashing and absorption heat pumps, were simulated using the HYSYS software platform,
in order to determine economically the best alternative.
Distillation with both top vapour recompression and bottom flashing heat pumps allows reduction of
operation (energy) costs by 33% and 32%, respectively. This improves the economic potential (incorporating
capital costs) by 9% and 10%, respectively. Due to the large steam consumption, when compared to the
conventional case, the absorption heat pump is not suitable for this system.
Economic feasibility of heat pumps in distillation to reduce energy use.pdf
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