Experimental analysis of the influence of microcapsule mass fraction on the thermal and rheological behavior of a PCM slurry

Uncertainty propagation and sensitivity analysis of thermo-physical properties of phase change materials (PCM) in the energy demand calculations of a test cell with passive latent thermal storage

“…The measurement of thermal conductivity of a PCM by the LFA technique has the major difficulty of determining this magnitude at the liquid state, since this methodology was originally developed for measurements in solids. In this work an accuracy of 10% has been considered, in accordance with the experimental results of Delgado et al [43] and Coquard et al [44]. Since this error is higher than the variation of this magnitude from solid to liquid phase, the same constant value for the thermal conductivity of both phases is used in this work.…”

Experimental analysis of a low cost phase change material emulsion for its use as thermal storage system

“…The thermal conductivity value for the PCM emulsion at 50°C, calculated from the heat capacity, thermal diffusivity and density values (this last property determined in the following Section 2.1.3) was 0.27 W/(m K), as against 0.63 for water. Measurements executed in previous studies on other commercial PCM slurries did not show such low thermal conductivity values, even though it is true that the PCM concentration in suspension was lower [24].…”

“…Such high viscosity will cause the viscous forces to prevail over the buoyancy forces, therefore not boosting the convection phenomenon. Other PCM slurries analyzed to date have shown a lower viscosity, about one order of magnitude lower [24], but they also had a lower paraffin concentration in suspension. Fig.…”

“…For these measurements a Pt90Rh10 sample holder supplied by Netzsch was used. The considerations proposed by the authors in a previous article were taken into account when doing the measuring [24]. To determine the accuracy of the measurements, three liquids whose thermal diffusivity value is known were measured: distilled water, hexadecane and glycerin.…”

Latent Heat Thermal Energy Storage Systems with Solid–Liquid Phase Change Materials: A Review

“…An inorganic polymer such as SiO 2 can also be used as the shell material because of its advantageous properties . The microencapsulation of PCMs allows the solidification of solid–liquid PCMs, not only enhancing the stability and heat transfer efficiency of PCMs, but also facilitating their utilization, storage, and transportation …”