Experimental steady-state and transient thermal performance of materials for thermal energy storage in building applications: From powder SS-PCMs to SS-PCM-based acrylic plaster

Numerical Assessment of Different Phase Change Materials as a Passive Strategy to Reduce Energy Consumption in Buildings under Tropical Climates

“…However, most PCMs have low thermal conductivity, which limits the optimal use of their high latent heat characteristic because of the low rate of charge/discharge [10]. Besides this, PCM can be incorporated into buildings by means of macro-encapsulated structures [11], PCM-concrete composites where block cavities are used [12], and powder-based plasters [13], among other things. However, leakages tend to appear during phase transition, and thermal conductivity decreases even more, limiting the building layout's usability.…”

“…On the other hand, although computational simulations provide faster results than experimental procedures, some recent works developed experimental studies to assess real PCM in tropical climates: Saxena et al [22] measured the temperature reduction on a building improved with PCM-embedded bricks with one and two layers; Rathore and Shukla [8] evaluated the thermal response of a building under a real tropical climate by means of erecting two concrete-based cubicles, where only one had aluminum-based macrocapsules of PCM; Hakim et al [12] also compared inner wall temperature between a case with PCM added to brick cavities and a case with only concrete bricks; Cardenas-Ramírez et al [13] calculated the thermal transmittance, heat storage capacity, and thermal inertia of different combinations of three shape-stabilize PCMs experimentally.…”

“…PCM implementation offered an inner roof temperature range between 29 • C and 33 • C, when, without PCM, it varied between 28 • C and 35 • C. This represents a decrement factor improvement from 0.232 to 0.14-0.033 and an increase of time lag from 5 h to 7-8 h. Saxena et al [22] tested PCM-embedded bricks, where reductions of 9.5 • C and 6 • C were achieved with a single PCM layer and a double PCM layer, respectively. Cárdenas-Ramírez et al [13] exposed, by an experimental setup, how using stabilized-shape PCM-based acrylic plaster increases thermal lag by 67.26%, decreases by 9% the decrement factor, and provides an indoor temperature reduction of 20.8%. Moreover, the usage of PCMs as powder can increase the thermal lag by between 148% to 180% depending on the PCM type.…”

“…This is because fins increase the heat rate; thus, the temperature rises higher than admissible to allow an appropriate night discharge. Cárdenas-Ramírez et al [13] tested stabilized shape-PCM-based acrylic plaster used as fiber cement siding finish in combination with insulating paint. It was found that combining both techniques provided a smaller decrement factor, larger thermal lag, and smaller thermal transmittance than using only insulating paint.…”

Formulation and phase change mechanism of Capric acid/Octadecanol binary composite phase change materials

“…Organic composite PCMs are mainly prepared, for example, by paraffin and fatty acid [26], fatty acid and fatty acid [11,27,28], fatty acid and fatty alcohol [29][30][31][32]. Because fatty acids and fatty alcohols mainly come from the natural animal fat and vegetable oil, they have compared with paraffin lower flammability and better biodegradability [17,33]. The compounded binary composite PCM of fatty acids and fatty alcohols has good thermal stability, chemical compatibility and long-term cycling reliability, and can be a low energy consumption thermal energy storage (TES) material [34,35].…”