Microencapsulated phase change materials for enhancing the thermal performance of Portland cement concrete and geopolymer concrete for passive building applications
By V. Cao, Shima Pilehvar, C. Salas-Bringas, A. Szczotok, J. Rodríguez, M. Carmona, Nodar Al-Manasir, A. Kjøniksen. 2017
305 citations recorded by the source corpus.
Abstract Concretes with a high thermal energy storage capacity were fabricated by mixing microencapsulated phase change materials (MPCM) into Portland cement concrete (PCC) and geopolymer concrete (GPC). The effect of MPCM on thermal performance and compressive strength of PCC and GPC were investigated. It was found that the replacement of sand by MPCM resulted in lower thermal conductivity and higher thermal energy storage, while the specific heat capacity of concrete remained practically stable when the phase change material (PCM) was in the liquid or solid phase. Furthermore, the thermal conductivity of GPC as function of MPCM concentration was reduced at a higher rate than that of PCC. The power consumption needed to stabilize a simulated indoor temperature of 23 °C was reduced after the addition of MPCM. GPC exhibited better energy saving properties than PCC at the same conditions. A significant loss in compressive strength was observed due to the addition of MPCM to concrete. However, the compressive strength still satisfies the mechanical European regulation (EN 206-1, compressive strength class C20/25) for concrete applications. Finally, MPCM-concrete provided a good thermal stability after subjecting the samples to 100 thermal cycles at high heating/cooling rates.
Subfields: Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/7ceb5cc6b1390c33c6b278ba2ad739bc916c2297
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In Mechanical Engineering
Citations in the corpus
- A review of microencapsulated and composite phase change materials: Alteration of strength and thermal properties of cement-based materials (2019, background): “Apart from the low thermal conductivity of mPCM, the reduction could also be related to both the low density and the increased entrapped air in CBM caused by PCM [100,114].”
- Effect of freeze-thaw cycles on the mechanical behavior of geopolymer concrete and Portland cement concrete containing micro-encapsulated phase change materials (2019, background): “It should be noted that PE-EVA-PCM exhibits a non-spherical geometry and contains high amounts of agglomerates while St-DVBPCM have a spherical shape [18,22].”
- Mechanical properties and microscale changes of geopolymer concrete and Portland cement concrete containing micro-encapsulated phase change materials (2017, unknown): “Similar observations have been reported previously [7,21].”