The present work for the first time explores the possibility of a small-scale cogeneration unit by combining
solid–gas chemisorption refrigeration cycle and a scroll expander. The innovation in this work is the
capability of producing refrigeration and electricity continuously and simultaneously without aggravating
the energy scarcity and environmental impact. Individual modelling for each component, which has
been validated by experimental data, was firstly investigated in order to identify the proper operation
condition for the cogeneration mode achieving 1000 W power output. Subsequently, with the integrated
modelling of two components the cogeneration performance was studied to demonstrate the viability of
this concept. However, because of the mutual constraint between the chemisorption and the expansion
when they link in series, the power output of the cogeneration mode was only around one third of the
original expectation under the same condition identified in the individual modelling. Methods of improving
the global performance including the selection of reactive mediums were also discussed and would be
of referable value for the future practical investigation.