Preparation of Ternary Composite Phase Change Storage Mortar

Abstract:

In this paper, ternary composite paraffin was used as raw material, vitrified microsphere and expanded pearlite were used as carrier, styrene-acrylic emulsion and EVA emulsion as encapsulated to prepare phase change energy storage mortar. According to paraffin adsorption capacity, leakage and other performance tests , the appropriate carrier and encapsulate materials were selected . The results show that, through both temperature-time curve test and DSC analysis, the best ratio of 3# paraffin to n-tetradecane to solid paraffin is 1:2:7. Vitrified microsphere as carrier, the amount of paraffin under vacuum adsorption condition for 30mins is 502.2% which is much higher than that of expanded pearlite. Styrene-acrylic emulsion as encapsulate material, the leakage of paraffin problem can be solved effectively, and in this case, the minimum leakage of paraffin/vitrified microsphere is only 4.42%. The compressive strength of paraffin/vitrified microsphere phase change energy storage mortar is 5.35 MPa, the thermal conductivity is 0.3372 W/m·K which improved the insulation performance of mortar significantly.

• Periodical: Applied Mechanics and Materials (Volumes 672-674)
• Pages: 533-537
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.672-674.533
• Online since: October 2014
• Authors: Qing Wang*, Tao Jun Wu, Zhao Yang Ding, Cun Bao Zhang
• Keywords: Expanded Pearlite, Mortar, Paraffin, Phase Change Materials (PCM), Vitrified Microsphere

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