Improving the performance of solar still using different heat localization materials (original) (raw)
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Updates on Evaporation and Condensation Methods for the Performance Improvement of Solar Stills
Energies, 2021
Solar still, a small equipment using evaporation and condensation processes to get clean water, is expected to be widely used for sea/brackish water desalination, water purification, and wastewater treatment because of its convenient carrying, friendly environment, and low energy consumption. In recent years, considerable progress has been made in improving the productivity of solar still. This paper will reclassify the methods to improve the solar still by elevating the evaporation rate and condensation rate. The main methods increasing evaporation rate are as follows: (i) adding heat storage materials; (ii) using nanoparticles; (iii) changing structure of the absorption plate; and (iv) using photothermal materials. The primary methods increasing the condensation rate are as follows: (i) cooling the condensing surface; (ii) increasing the condensation area; (iii) changing the wettability of the condensing surface; and (iv) using a separate condenser. The advantages and disadvantage...
A Review on Performance and Heat Transfer Enhancement in Solar Still
International Journal of Scientific Research in Science, Engineering and Technology, 2023
The earth’s surface covers 71% of water area. Drinking water is a necessary thing for all living organism in the earth. But the availability of potable water is no longer available in rapid increase of population. So one of the way to obtain clean water from saline water is solar desalination. Solar desalination is the process of obtaining clean water from saline water. For desalination a device solar still can be employed. The solar still is one of the effective ways of desalinating saline water with an affordable price. Using extended surface the productivity of solar still is increased. The extended surface is modified to improve the evaporation rate and to absorb more solar radiation. Present review paper shows the use of extended surface in solar still and how to increase solar still production.
All living things have the fundamental need to consume safe drinking water on a daily basis; therefore, it is essential to have an understanding of the shortage of water and the primary freshwater supplies. With the rising levels of pollution caused by both industry and people, the amount of potable water that is available is coming under growing threat. The present work makes use of latent and sensible materials to maximize the distillate yield of a single basin solar still. Utilizing latent and sensible material enhances the production of distillates yield and overall performance of solar still. Latent material paraffin wax enhanced nocturnal distillates, while suspended wicks increased the rate of evaporation for daytime productivity. The experimental investigation utilizes 5,500 g of paraffin wax because it provides the highest cumulative efficiency. The overall productivity of paraffin wax and paraffin wax with suspended wicks increased by 27.65% and 30.12%, respectively. In a modified solar still, the overall maximized distillate yield was recorded as 4.24 kg/m 2 and the cumulative efficiency was 78.62%. The single component temperatures of solar still show significant changes in temperature throughout the day. It was determined that the utilization of wicks as a sensible material enhanced the evaporation rate and the quantity of distillate produced. 32.8 g of maximum distillates were obtained by using wicks with a length of three inches and a depth of 3 cm.
Journal of Energy Technologies and Policy, 2016
Solar distillation is regarded by many investigators as one of the important methods of utilizing solar energy to solve water scarcity problems. A solar still is a simple device which can be effectively used to convert saline water into fresh water. The enhancement of solar stills performance and improving their production capacity of distilled water are the main goals of the investigators in recent years. In this research, three identical conventional basin type solar stills were designed and constructed in order to experimentally investigate the affect of using different wick materials in two different layout arrangements. The first solar still was used as a reference still for comparison. The second solar still was used for uniformly spreading the wick material sheets in the saline water. In this case, the wick materials sheets were completely immersed in the saline water covering the total still basin area. The third solar still had a specially designed set up of steel mesh wir...
Energies, 2020
This study is intended to investigate and analyze the operational performances of the Conventional Tubular Solar Still (CTSS), Tubular Solar Still with Phase Change Material (TSS-PCM) and Tubular Solar Still with Nano Phase Change Material (TSS-NPCM). Paraffin wax and graphene plusparaffin wax were used in the CTSS to obtain the modified solar still models. The experimental study was carried out in the three stills to observe the operational parameters at a water depth of 1 cm. The experiment revealed that TSS-NPCM showed the best performance and the highest yield in comparison to other stills. The distillate yield from the CTSS, TSS-PCM and TSS-NPCM was noted to be 4.3, 6.0 and 7.9 kg, respectively, the daily energy efficiency of the stills was observed to be 31%, 46% and 59%, respectively, and the daily exergy efficiency of the stills was recorded to be 1.67%, 2.20% and 3.75%, respectively. As the performance of the TSS-NPCM was enhanced, the cost of freshwater yield obtained was ...