12 Direct Photo-Thermal Energy Storage Using Nanoparticles …
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Fig. 12.1 a Schematic showing ultra-sonication process for preparing nano-PCM; b showing prepared samples of nano-PCM after ultra-sonication process
method is indirect method of sonication and the advantage of this method is that
sonic energy is transmitted from horn through the water and into multiple samples
i.e. a large number of nano-PCM samples could be prepared simultaneously. We
use ultra-sonicator bath model SU-323 with load 3A by filling ¾ liquid in the tank
(water). The process has been carried out for 15 min, subsequently, the as-prepared
nano-PCM samples were cool down to atmospheric conditions. Figure 12.1b shows
the picture of as-prepared nano-PCM samples after the ultra-sonication process.
12.3 Experimental Set-Up
Figure 12.2 shows the experimental set up consisting of 0.8 cm diameter optical light
guide transporting the light from halogen lamp (250 W, 24 V Philips) connected with
transformer and power supply. Intensity of light as measured by thermopile detector
and power meter (1918-R, Newport) is 12.5 W/cm
2 . Holding clamp is used to hold
the optical light guide and the cylindrical tube housing the PCM is fixed at the base of
239
Fig. 12.1 a Schematic showing ultra-sonication process for preparing nano-PCM; b showing prepared samples of nano-PCM after ultra-sonication process
method is indirect method of sonication and the advantage of this method is that
sonic energy is transmitted from horn through the water and into multiple samples
i.e. a large number of nano-PCM samples could be prepared simultaneously. We
use ultra-sonicator bath model SU-323 with load 3A by filling ¾ liquid in the tank
(water). The process has been carried out for 15 min, subsequently, the as-prepared
nano-PCM samples were cool down to atmospheric conditions. Figure 12.1b shows
the picture of as-prepared nano-PCM samples after the ultra-sonication process.
12.3 Experimental Set-Up
Figure 12.2 shows the experimental set up consisting of 0.8 cm diameter optical light
guide transporting the light from halogen lamp (250 W, 24 V Philips) connected with
transformer and power supply. Intensity of light as measured by thermopile detector
and power meter (1918-R, Newport) is 12.5 W/cm
2 . Holding clamp is used to hold
the optical light guide and the cylindrical tube housing the PCM is fixed at the base of