Abstract
Abstract A comparison of the thermal performance of an eutectic solder (Sn63/Pb37) with that of three organic PCMs: erythritol, adipic acid, high density polyethylene (HDPE), inside similar spherical aluminium capsules is presented. Erythritol exhibits superior charging characteristics than the other PCMs in both the static and the dynamic modes. However, subcooling hampers the discharging performance of erythritol at high heat retrieval rates as the latent heat is discharged at temperatures lower than 100 °C. Sn63/Pb37 possesses stable charging and discharging performances in both the static and dynamic modes and shows the potential of being an ideal PCM for medium temperature applications. The solder’s performance is second to that of erythritol even at low heat retrieval rates with latent heat discharged at the highest temperatures. Adipic acid presents relatively better charging and discharging performances than HDPE. Sn63/Pb37 shows good potential as a metallic PCM candidate for domestic thermal energy storage applications.
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