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Analysis of phase change materials selection (PCMs) for latent heat storage by multicriteria decision methods (MCDM)

Abstract:

Use of thermal energy storage (TES) with high-temperature phase change materials (PCMs) for the above-mentioned applications will allow raising considerably energy efficiency in using the thermal and solar energy and solve the disparity between energy production or availability and consumption. This research aims to select a PCM which better accomplish the solution of the TES between 200– 400 °C and reduce the cost of production. Multi-criteria decision-making methods (MCDM) have been implemented to solve the problem. It has been considered characteristic properties and qualitative criteria of the materials to assign importance to each alternative in order to select the best alternative. The results illustrated the best and second-best choice for the three MCDM were NaOH and KNO3, because they had the highest values of the most important criteria for a PCM. Furthermore, it had values of Spearman’s rank correlation between the methods exceeds of 0,714.