Development of a ventilation system utilizing thermal energy storage for granules containing phase change material

Review of PCM based cooling technologies for buildings

“…A paper by Takeda et al [39] discusses the development of a ventilation system using direct heat exchange between PCM granules and air. PCM packed bed was installed vertically in a supply air duct and air was blown through the packed bed under certain conditions releasing heat or cold to it (Fig.…”

Modeling and simulation of a phase change material system for improving summer comfort in domestic residence

“…Lazaro [19] had experimented two real-scale prototypes of vertical PCM-air heat exchangers for free-cooling applications in buildings with macro-encapsulated PCM. Takeda [20] developed a ventilation system using thermal energy storage with granules containing phase change material which leads to cooling loads reduction up to 62% in the Kyoto climate. Different systems with water instead of air as heat transfer fluid have also been studied.…”

Novel cooling unit using PCM for residential application

“…During the past 20 years, different designs of ventilation systems using PCM's have been proposed and their performance for free cooling of buildings has been investigated Stritih, 2006, 2009;Stritih and Butala, 2007;Zalba et al, 2004a;Arkar et al, 2007;Arkar and Medved, 2007;Takeda et al, 2004;Medved and Arkar, 2008;Mozhevelov et al, 2006;Zhou et al, 2009;Yanbing et al, 2003;Turnpenny et al, 2000Turnpenny et al, , 2001. The results obtained from these studies have primarily demonstrated that the free cooling technique by using PCMs in buildings can provide better indoor thermal comfort, and help reduce the need of air-conditioning use and sizes of air-conditioning systems.…”

“…However, this concept is only feasible in climate conditions with relatively large temperature differences between day and night in Summer (Takeda et al, 2004;Medved and Arkar, 2008).…”

“…The free cooling potential of using PCMs in buildings in different climate conditions was studied by Takeda et al (2004) and Medved and Arkar (2008). Both studies indicated that the potential of free cooling mainly depends on the amplitude of the ambient air temperature variations.…”