TBAB (Tetra-n-butylammonium bromide) hydrate has a phase change temperature of 5 to 12°C and is expected to be used as a latent heat storage material for air conditioning systems. Generally, TBAB hydrate shows a remarkable supercooling phenomenon at the time of formation, but it can be suppressed by adding specific metal particles having a nucleation promoting effect. In this study, we investigated changes in the performance of metal particles by adding metal particles to a TBAB aqueous solution and repeating the formation and melting of hydrates. Moreover, we investigated changes in the performance of metal particles by immersing them in TBAB aqueous solution for a specific number of days. As a result, it was found that the performance of metal particles is significantly reduced by repeatedly using the particles or immersing them in TBAB aqueous solution.
