Appendix

The experimental work analysis of a solar still have been approved out from 6 to 6 am of 24 hours duration the collective evaporative, convective and radiative heat transfer coefficient with water flowing over the glass cover by absorbing materials deliverable during 2017 at Research Center of Physics, Veltech Multitech Engineering College, Avadi, Chennai—600062 [Latitude 13.1067°N, 80.0970°E], Tamilnadu, India to the atmosphere can be written as

$$h\_4 = 0.016 \times h\_2 \times \left(P\_{\rm fw} - \gamma P\_a\right) \tag{19}$$

$$P\_{\rm fw} = R\_1 T\_{\rm fw} + R\_2$$

$$\gamma P\_a = R\_1 T\_a + R\_2$$

$$h\_1 = h\_{\rm cug} + h\_{\rm eug} + h\_{\rm rug} \tag{20}$$

$$h\_{\rm ceg} = 0.884 \times \left[\left(T\_{\rm Fw} - T\_{\rm g}\right) + \frac{\left(P\_{\rm Fw} - P\_{\rm g}\right)\left(T\_{\rm Fw} + 273\right)}{268900 - P\_{\rm Fw}}\right]^{\frac{1}{3}}$$

$$h\_{\rm cag} = 0.016273 \times h\_{\rm cag} \left(\frac{P\_{\rm Fw} - P\_{\rm g}}{T\_{\rm Fw} - T\_{\rm g}}\right)$$

$$h\_{\rm rug} = \frac{e\sigma\left[\left(T\_{\rm Fw} + 273\right)^4 - \left(T\_{\rm g} + 273\right)^4\right]}{\left(T\_{\rm Fw} - T\_{\rm g}\right)}$$

$$h\_2 = h\_{\rm cwa} + h\_{\rm rwa} \tag{21}$$

h<sup>3</sup> ¼ hcbw þ hrbw (24)

� � TbþPCMþNanoparticles <sup>þ</sup> <sup>273</sup> � �

=3

PbþPCMþNanoparticles � Pw

<sup>268900</sup> � PbþPCMþNanoparticles � �<sup>1</sup>

εσ TbþPCMþNanoparticles <sup>þ</sup> <sup>273</sup> � �<sup>4</sup> � ð Þ Tw <sup>þ</sup> <sup>273</sup> <sup>4</sup> h i

TbþPCMþNanoparticles � Tw � �

where the water, flowing water temperature at x = 0; and glass cover is instan-

Research Center of Physics, Koneru Lakshmaiah Education Foundation

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium,

(KLEF—KLU), Guntur District, Andhra Pradesh, India

provided the original work is properly cited.

\*Address all correspondence to: s.shanmugam1982@gmail.com

hcbw ¼ 0:884 � TbþPCMþNanoparticles � Tw

DOI: http://dx.doi.org/10.5772/intechopen.88114

hrbw ¼

Author details

S. Shanmugan

235

taneous glass temperature for each hour.

� � <sup>þ</sup>

Strategies in Absorbing Materials Productivity (H2O) of Renewable Energy…

hca ¼ 5:7 þ 3:8 V

$$h\_{cwa} = \textbf{0.884} \times \left[ \left( T\_{Fw} - T\_a \right) + \frac{\left( P\_{Fw} - P\_a \right) \left( T\_{Fw} + 273 \right)}{2 \textbf{68900} - P\_{Fw}} \right]^{1/3}$$

$$h\_{rwa} = \frac{\varepsilon \sigma \left[ \left( T\_{Fw} + 273 \right)^4 - \left( T\_a + 273 \right)^4 \right]}{\left( T\_{Fw} - T\_a \right)}$$

$$m\_{fw} = b l\_w$$

where lw is the thickness of flowing water over the glass cover

$$h\_3 = h\_{cbw} + h\_{rbw} \tag{22}$$

$$h\_{chw} = 0.884 \times \left[ \left( T\_{b + PCM + Numparidds} - T\_w \right) + \frac{\left( P\_{b + PCM + Numparidds} - P\_w \right) \left( T\_{b + PCM + Numparidds} + 273 \right)}{288900 - P\_b} \right]^{\frac{1}{2}}$$

$$h\_{rbw} = \frac{\varepsilon \sigma \left[ \left( T\_{b + PCM + Numparidds} + 273 \right)^4 - \left( T\_w + 273 \right)^4 \right]}{\left( T\_{b + PCM + Numparidds} - T\_w \right)}$$

$$h\_4 = h\_{gw} + h\_{gw} \tag{23}$$

$$h\_{cgw} = 0.884 \times \left[ \left( T\_{\xi} - T\_w \right) + \frac{\left( P\_{\xi} - P\_w \right) \left( T\_{\xi} + 273 \right)}{268900 - P\_{\xi}} \right]^{\frac{1}{2}}$$

$$h\_{gw} = \frac{\varepsilon \sigma \left[ \left( T\_{\xi} + 273 \right)^4 - \left( T\_w + 273 \right)^4 \right]}{\left( T\_{\xi} - T\_w \right)}$$

234

Strategies in Absorbing Materials Productivity (H2O) of Renewable Energy… DOI: http://dx.doi.org/10.5772/intechopen.88114

$$h\_3 = h\_{cbw} + h\_{rbw} \tag{24}$$

$$h\_{chw} = 0.884 \times \left[ \left( T\_{b + P\text{CM} + \text{Nunaparides}} - T\_w \right) + \frac{\left( P\_{b + P\text{CM} + \text{Nunaparides}} - P\_w \right) \left( T\_{b + P\text{CM} + \text{Nunaparides}} + 273 \right)}{268900 - P\_{b + P\text{CM} + \text{Nunaparides}}} \right]^{\frac{1}{\frac{1}{2}}}$$

$$h\_{rhw} = \frac{\epsilon \sigma \left[ \left( T\_{b + P\text{CM} + \text{Nunaparides}} + 273 \right)^4 - \left( T\_w + 273 \right)^4 \right]}{\left( T\_{b + P\text{CM} + \text{Nunaparides}} - T\_w \right)}$$

where the water, flowing water temperature at x = 0; and glass cover is instantaneous glass temperature for each hour.
