Experimental investigation of PCM spheres in thermal energy storage system
Date
2013Author
Nasrul Amri, Mohd Amin, Dr.
Azizul, Mohamad
Mohd Shukry, Abdul Majid, Dr.
Mohd Afendi, Rojan, Dr.
Bruno, Frank, Dr.
Belusko, Martin
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This paper presents the experimental result of a small scale packed bed of random spheres
with encapsulated PCM being charged and discharged. A vapor compression refrigerator and heated
room with fan heater were used to supply constant heat transfer fluid at a minimum temperature of -
28ºC for charging and 16ºC for discharging. Even though the temperature differences were not
fixed in the experiments, the performance of the thermal energy storage is depicted in the form of
effectiveness values. Different results were obtained for charging and discharging the thermal storage unit. The differences are expected to come from natural convection and super cooling. The super cooling during the charging process was as high as 6ºC.