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Abstract
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In this work, a combination of a latent heat thermal storage unit and a refrigeration system is presented
as an air conditioning system. Overall system, including charging and discharging processes is analyzed
for different phase change materials (PCMs) from exergoeconomic and environmental points of view.
Based on comfort condition, three cases are selected with different size of PCM slabs and different
PCMs: RT27, S27 and SP25. When the charging process takes place during the whole of off-peak hours
the following results are obtained: (1) the system using SP25 has the highest value of the coefficient
of performance; (2) the system using RT27 has the highest value of exergy efficiency and (3) the system
using S27 has the lowest value of total cost rate. Finally, in order to obtain the best balance between the
exergy destruction cost rate and the capital cost rate, the exergoeconomic factor is defined for each
component, for different cases when system operates in the best performance conditions.
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