Over the past decades, the increasing use of air conditioning systems
has been one of the main drivers for reducing the peak of electricity
consumption. PCMs (phase change materials) for cold thermal energy
storage (CTES) allow us to achieve a heat capacity for future use.
Hence, CTES has been suggested to reduce power demand problems. In
this study, to obtain the phase change temperature and formation temperature
of TBAF, TBAC, and TBAOH semiclathrate salts as CTES for air conditioning
applications, the experiments were performed from 10 to 50 wt %. Also,
the effect of two additives, Tween 80 and SDS, at three weight percentages
(0.1, 0.3, and 0.5 wt %) on formation temperature and phase change
temperature was investigated. Furthermore, the effects of SDS and
Tween mixtures using Design Expert software and Analysis of Variance
(ANOVA) were analyzed and optimized. The results showed that, in general,
TBAF hydrate solution had a higher phase change temperature and formation
temperature than TBAC and TBAOH salt semiclathrate. The highest phase
change temperature for all salts TBAF, TBAC, and TBOAH occurred at
approximately 35 wt %, and their temperatures were 24.6 °C, 14.1
°C, and 12.8 °C, respectively. Using SDS and Tween additives,
the phase change temperature and hydrate deflection time of TBAC,
TBAF, and TBAOH were 21.73 °C, 26.08 °C, and 28.84 °C
and 32.31 min, 25.92 min, and 20.20 min, respectively. With the Design
Expert software, a model for the phase change temperature and deflection
time of each hydrate was obtained. In the optimization section, a
condition of the optimal hydrate formation was proposed.