Untersuchung des Einflusses der Geometrie von PCM‐Elementen auf ihre Wärmespeichereffizienz.

Analysis of the impact of PCM elements' geometry on their heat storage efficiency. The article presents the results of experimental research on elements of the internal window shutter subjected to modification by a phase‐change material. The subject of the analysis was the assessment of improving heat storage efficiency of window blinds by increasing their heat capacity. An increase in the capacity of the blinds was obtained by using organic phase‐change material. These materials are relatively expensive, so their most optimal use is required if the best cost effectiveness of applied solution is to be obtained. Research results indicate that the PCM augmented shutters allows for better adjustment of solar gains to the heat demand profile of a compartment. These solutionsenabled temporary storage of absorbed heat, which resulted in a reduction in daily temperature fluctuations of the glazing and indoor air. In comparison with conventional indoor blinds, application of described solutions resulted in reduction in energy demand for building heating. Obtained results indicate a greater dependence of heat distribution within PCM filled profiles on their geometry than on any studied external factors. [ABSTRACT FROM AUTHOR]