Investigating the effect of size and number of layers of iron nanochannel on the thermal behavior and phase change process of calcium chloride/sodium sulfate hexa-hydrate with molecular dynamics simulation
Journal of Energy Storage
Phase change material (PCM) is a material that has a specific melting point, and its latent heat of melting is large enough that it can be used to store thermal energy. This study investigated the effect of size (4–8 Å), and the number of layers (3–10 layers) of iron nanoparticles (NPs) channel on thermal behavior (TB) and phase change (PC) process of sodium sulfate/calcium chloride hexahydrate (Na2SO4/MgCl2·6H2O) PCM molecular dynamics (MD) simulation. By increasing the number of layers from 3 to 5, the maximum temperature and heat flux (HF) increased from 406 and 1471 W/m2 to 451.51 K and 1496 W/m2. By increasing the number of layers from 3 to 7 layers, the charging time (CT) and discharge time (DT) of atomic samples decreased from 4.01 ns and 4.25 ns to 3.88 ns and 4.17 ns. By adding the iron NPs with a radius of 4, 5, 6, and 8 Å, the maximum temperature increased to 420, 429, 458, and 503 K, respectively. By adding the iron NPs with different radii from 4 to 8 Å, the HF increased from 1566 W/m2 to 1657 W/m2. By adding the iron NPs into the Na2SO4/MgCl2·6H2O, the received HF increased, and the maximum temperature increased. By adding the iron NPs with different radii, the CT decreased from 3.95 ns to 3.73 ns. The DT increased from 4.33 ns to 4.36 ns by increasing the radius from 4 to 8 Å. According to the TB of this PCM, it should be used in refrigerants instead of toxic and dangerous refrigerants, such as ammonia and chlorofluorocarbon. Moreover, they were used for construction purposes for double-glazed windows.
Open Access Status
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