2.2 Heat transfer coefficient and productivity of a still

It have been finished in a basin area of copper leaf and black paint coating in a basin area, dye miscellaneous Al2O3 Nanoparticles coating through inner area with absorbing wick materials to absorb surplus solar radiation. The solar radiation communicated through the water flowing transfer to glass cover and fascinated by a wick and fin wick materials apparent—Al2O3 to comportment by the copper coil and then shadows the phase change materials—C18H36O2. The solar radiation is immersed through Al2O3 Nano particles soars esoteric the absorbing materials area intensification further heat transfer chic inside nigh to visible and IR spectrum. The saline water from side to side of an exceptional establishment has been finalized to pour saline water drop by drop over the absorbing material kept in the basin. The drip heat transfer pipes occupied coating Nano particles miscellaneous black paint to the lengthways dripping association is finished of drip button stationary at consistent intermissions of 0.10 m and heat pipe static in amidst the gap is 0.10 m horizontally in the basin.

prepared in the basin vulnerable copper coil in 1 diameter, intervals of 0.10 m and total coil 10 m fixed in the basin. The coil occupied mad black painted and mixed Al2O3—nano particles more absorb solar radiation and heat extraction supplementary progress the still is the charity for C18H36O2—PCM for 8 kg inside the coil secure basin area. The PCM melting point increase has been debauched evaporation of the solar still. The saline water tank is providing with a gate valve and is associ-

A provisional organization of water flowing over the glass cover of a singleslope single-basin solar still have been finished with the help of PVC pipe of ½ inch diameter. The length of the pipe is taken precisely equal to the width of the still so that the water would not flow in the lengthwise direction. A number of holes are made in the pipe by equal spacing to maintain the uniform flow over the glass cover. The PVC pipe is clipped at the top of the glass cover. The water at the lower end of the glass cover was collected in a small plastic bucket. Due to the water flow over the glass cover, most of the heat was utilized for evaporation during the day, uptown mid night in this process. There existed fast evaporation due to the large temperature difference between the glass cover and the water surface as expected shown that the Figure 4 water flowing the experimental glass

The water temperature in the absorbing materials is to condensing water flowing cover temperature quantity by fixing copper-constantan thermocouples which have

View of experimental works of water flowing over glass cover used by a solar still with absorbing materials.

ated with the fjord of the dripping organization.

Basin area arrangement of copper coil in fixed drip button heat pipes.

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

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

cover cooling effect.

Figure 4.

223

Figure 3.

The PCMs energy spread stabilities are melting in a wide temperature range [23]. Various evaluations are escorted [24, 25] and a full association of the hottest progresses in PCMs with their thermo physical properties can be found that to be literature. Figure 3 current these progresses of the absorbing materials setting in basin to improve heat, based on the above reviews, with polymeric and solid-solid PCMs involved.

Figure 3, new solar still have been manufactured in the basin area static a copper coil arrangement and is immovable drip heat pipes. The influence of the solar still is immovable in 10 drip heat pipes and buttons are each a distance of 0.10 0.10 m by a placed horizontally in the basin with south to north orientation. It have been

Figure 2. Sectional view of the solar still with flowing water influence of absorbing materials.

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

#### Figure 3.

slobbered miserable to the gaging jar. The investigational engaged classical has been

It have been finished in a basin area of copper leaf and black paint coating in a basin area, dye miscellaneous Al2O3 Nanoparticles coating through inner area with absorbing wick materials to absorb surplus solar radiation. The solar radiation communicated through the water flowing transfer to glass cover and fascinated by a wick and fin wick materials apparent—Al2O3 to comportment by the copper coil and then shadows the phase change materials—C18H36O2. The solar radiation is immersed through Al2O3 Nano particles soars esoteric the absorbing materials area intensification further heat transfer chic inside nigh to visible and IR spectrum. The saline water from side to side of an exceptional establishment has been finalized to pour saline water drop by drop over the absorbing material kept in the basin. The drip heat transfer pipes occupied coating Nano particles miscellaneous black paint to the lengthways dripping association is finished of drip button stationary at consistent intermissions of 0.10 m and heat pipe static in amidst the gap is 0.10 m

The PCMs energy spread stabilities are melting in a wide temperature range [23]. Various evaluations are escorted [24, 25] and a full association of the hottest progresses in PCMs with their thermo physical properties can be found that to be literature. Figure 3 current these progresses of the absorbing materials setting in basin to improve heat, based on the above reviews, with polymeric and solid-solid

Figure 3, new solar still have been manufactured in the basin area static a copper coil arrangement and is immovable drip heat pipes. The influence of the solar still is immovable in 10 drip heat pipes and buttons are each a distance of 0.10 0.10 m by a placed horizontally in the basin with south to north orientation. It have been

Sectional view of the solar still with flowing water influence of absorbing materials.

established for water flowing through a solar still follow the schematic plan

2.2 Heat transfer coefficient and productivity of a still

Figure 2.

Water Chemistry

horizontally in the basin.

PCMs involved.

Figure 2.

222

Basin area arrangement of copper coil in fixed drip button heat pipes.

prepared in the basin vulnerable copper coil in 1 diameter, intervals of 0.10 m and total coil 10 m fixed in the basin. The coil occupied mad black painted and mixed Al2O3—nano particles more absorb solar radiation and heat extraction supplementary progress the still is the charity for C18H36O2—PCM for 8 kg inside the coil secure basin area. The PCM melting point increase has been debauched evaporation of the solar still. The saline water tank is providing with a gate valve and is associated with the fjord of the dripping organization.

A provisional organization of water flowing over the glass cover of a singleslope single-basin solar still have been finished with the help of PVC pipe of ½ inch diameter. The length of the pipe is taken precisely equal to the width of the still so that the water would not flow in the lengthwise direction. A number of holes are made in the pipe by equal spacing to maintain the uniform flow over the glass cover. The PVC pipe is clipped at the top of the glass cover. The water at the lower end of the glass cover was collected in a small plastic bucket. Due to the water flow over the glass cover, most of the heat was utilized for evaporation during the day, uptown mid night in this process. There existed fast evaporation due to the large temperature difference between the glass cover and the water surface as expected shown that the Figure 4 water flowing the experimental glass cover cooling effect.

The water temperature in the absorbing materials is to condensing water flowing cover temperature quantity by fixing copper-constantan thermocouples which have

#### Figure 4.

View of experimental works of water flowing over glass cover used by a solar still with absorbing materials.

been calibrated originally. Solar radiation intensity and ambient temperature have been restrained with solar radiation monitor and digital thermometer. Experimental work analysis of a solar still have been carried out from 6 to 6 am of 24 hours duration 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.
