Next Generation Phase Change Materials as Multifunctional Watery Suspension for Heat Transport and Heat Storage

摘要

The phase change materials (PCM) were modified to paraffin watery dispersions, well structured as multifunctional fluids for both, heat transport and heat storage in thermal cooling technology. Two types PCM dispersions, paraffin microcapsule watery suspension (Slurry A) and paraffin microemulsion (Slurry B), absorbed and released heat in a temperature range of phase transition from 2°C to 12°C. Thermal capacity of paraffin Slurry A was about 53kJ/kg, while paraffin Slurry B exchanged about 83kJ/kg amount of heat during phase transition. Systematization of thermophysical data and structural imaging of Slurry A and Slurry B, studied before and after thermal cycling, allowed comparison of thermal efficiency and structural stability during multiple phase transitions. The correlation between structural properties and thermal storage capacity allows recommendation of a paraffin emulsion Slurry (B) suitable for practice as a watery dispersion architectured stable in limits of year and thermally efficient.