Authors: V. Kumaresan
Affilation: Anna University, India
Pages: 389 - 392
Keywords: NEPCM, sub cooling, carbon nanotubes, nucleating agent, CTES
Nano-enhanced phase change material (NEPCM) was prepared by two step method using distilled water as the base fluid, sodium dodecyl benzene sulphonate (SDBS) as a surfactant, pseudomonas as nucleating agent and multi-walled carbon nanotubes (MWCNT) as nano-material. The thermal conductivity of NEPCM was measured and reported at various temperatures using KD 2 Pro thermal analyzer. The experiments were conducted with various NEPCMs at different bath temperatures of -2ºC, -9ºC and -12ºC to study the solidification characteristics. The presence of nucleating agent completely eliminated the sub cooling that will help the cool thermal energy storage system (CTES) to operate at the highest possible surrounding heat transfer fluid temperature. The MWCNT enhanced the heat transfer rate and reduced the freezing duration appreciably. A reduction in the solidification time of 25% (Tsurr = - 2ºC) was achieved with the NEPCM. These two factors will play a major role in designing energy efficient CTES system.
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