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P Vinod Kumar Naidu and Ajay M Nair Charging and Discharging Period Analysis of Myristic Acid as Phase Change Material Company Germany, capacity 800 -3400 lph, head of 2-5 m) PCM (Paraffin wax) cylinder, copper helical coil heat exchanger made up of 1⁄4 in diameter copper tube, the helical coil having 8cm outer diameter and length of 10cm, T Type thermocouple, Data acquisition system (Agilent 34972A LXI Data Acquisition/Switch Unit), Insulation boxes for storage which is having similarly insulation like hot water bath. Photograph of the experimental set up is shown in figure 3. Hot water from the parabolic solar concentrator dish is flow to the testing section where the Paraffin wax PCM is kept and the hot water flows through the copper helical coil heat exchanger charges the Paraffin wax and the water reaches to hot water bath where the water is collected and then it is pumped back to solar concentrator dish through pump and once the Paraffin PCM is get fully charged, it is taken out from the testing section and kept in the insulation boxes for the discharge and T type thermocouple is kept two at charging container and storage insulation container to record the variation of temperature of Paraffin wax at various interval of charging and discharging Fig 3 Photograph of the experimental set up Table 1 Properties of Paraffin wax 3. Results and Discussions Paraffin wax during charging and discharging (a) (b) Fig 4(a)-(b) Condition of Paraffin wax at different stages of charging During experimentation it is found that pure Paraffin wax took 3h 5min for complete charging and at the end of complete charging the Paraffin wax attained a temperature of 70.2965 °C the variation of PCM temperatures with time during charging of pure Paraffin wax is shown in the graph. Paraffin Wax 58-60 0.21 189 (s) 795(l,70°C) 920(s,20°C) (a) Fig 5(a) PCM temperature vs charging time pure Paraffin wax 54| International Journal of Current Engineering and Technology, Vol.8, No.1 (Jan/Feb 2018) Material Melting point (°C) Latent heat of fusion(kJ/k K) Thermal conductivity (w/mK) Density(kg/ m3)PDF Image | Analysis of Paraffin Wax as a Phase Change Material
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