Abstract
This paper proposes the effect of nano-gallium capsules of weight fraction 1% and 5% on energy storage in manganese organo-metallic SS-PCM. Synthesis of MSS-PCM and encapsulation of liquid metal gallium was carried out by liquid phase reaction and in-situ polymerization method. The phase transition temperature and latent heat of the synthesized MSS-PCM is 38.39 °C and 73.83 kJ/kg for heating, 31.09 °C and 81.29 kJ/kg for cooling, respectively. The effect on the properties by adding n-Ga to MSS-PCM was investigated using FESEM, SEM, EDS, FTIR, DSC, TGA and LFA techniques. It was found that the maximum increase in enthalpy and thermal conductivity for MSS-PCM/n-Ga of wt.% (95%:5%) were 13.5% and 26.8%. The pure MSS-PCM, n-Ga and composite mixture were highly stable for 1000 cycles. TGA showed negligible change in thermal behaviour (RT-200 °C) and FTIR results confirmed that MSS PCM/n-Ga has good chemical stability after thermal cycling. Further it was concluded that MSS-PCM/n-Ga at 5% wt ratio has enormous potential for energy storage due to its thermal/chemical stability and high energy storage performance.
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