Experimental Investigation of Solar Still With Varying Pressure

2019 ◽  
Author(s):  
Harender Sinhmar ◽  
Jitendra Bhati ◽  
Ritanshu Bhati
Keyword(s):  
Experimental Investigation ◽  
Efficient Solution ◽  
Potable Water ◽  
Pure Water ◽  
Water Shortage ◽  
Solar Still ◽  
Scaled Model ◽  
The Earth ◽  
Water Output ◽  
Novel Method

Abstract The shortage for the pure water exists in many developing countries like India even though three fourth of the earth is sheltered by water. The main reason behind this is the unplanned growth of industry and uncontrolled growth of population. In this context, solar still may serve as an efficient solution for addressing pure water shortage in hot climatic areas facing scarcity of water. Solar still is a very simple device that can be used for converting the available non-potable water into potable water. Various water purifiers based on solar energy have been proposed in literature but most of them are having low water output. This paper presents a novel method of a solar water purifier operating under vacuum to enhance its productivity. An experimental investigation of a scaled model has been carried out and it was observed that productivity of solar still increases with decrease in pressure inside the still.

scholarly journals Experimental and numerical evaluation on performance of potable water productivity with rectangular fins basin triangular solar still

2021 ◽  
Author(s):  
Subramaniyan C ◽  
◽  
Prakash K B ◽  
Amarkarthik A ◽  
Kalidasan B ◽  
...  
Keyword(s):  
Water Conservation ◽  
Potable Water ◽  
Saline Water ◽  
Water Productivity ◽  
Research Work ◽  
Experimental Comparison ◽  
Solar Still ◽  
Distillate Output ◽  
Water Output ◽  
Typical Day

Demand and conservation for potable water has become a foremost concern world-wide. Many technologies were adapted for converting the saline water to potable water to meet the required demand on water conservation. In the current research work triangular solar still with rectangular-fins attached to the basin is proposed to enhance the output of potable water from the solar still setup. Solar still with and without rectangular-fins on the basin are fabricated for experimental comparison and evaluation in addition to numerical investigations. Thermal Performance, instantaneous efficiency and potable water output of the proposed solar still & base solar still are investigated during March month for the location of Sathyamangalam. Investigation shows enhancement of water production in the proposed solar still by 41% higher compared to the base still. The maximum distillate output from modified still and base still for a typical day is 3.1 liter and 2.2 liter respectively.

scholarly journals Productivity enhancement of stepped solar still integrated MEMS light sensors for solar tracker

2020 ◽  
Vol 6 (5) ◽  
pp. 0666-0667
Author(s):  
Ali. F. Muftah
Keyword(s):  
Efficient Solution ◽  
Potable Water ◽  
Renewable Energy Sources ◽  
Solar Still ◽  
Micro Electro Mechanical Systems ◽  
Solar Tracking ◽  
Distillate Yield ◽  
Potable Water Supply ◽  
Solar Tracker ◽  
Overall Performance

Water is life, and the threat of unsustainable means of potable water supplies has led to the reviews of various renewable energy sources to create a cleaner and more efficient solution for potable water supply. The aim of this study is to present a way in which the efficiency of stepped solar still can be increased. It is to increase the efficiency of solar still by increasing the amount of time that the solar still is directly perpendicular to the sunlight. The Micro-Electro-Mechanical Systems (MEMS) light sensors for solar tracking are used to enhance the productivity. The results obtained indicate that the use of MEMS light sensors for solar tracking are used to makes a solar still to be predictable and it equally increases its efficiency in terms of distillate yield and overall performance.

scholarly journals Improvement of solar still productivity by using PCM and other enhancement technique- A review

2021 ◽  
Vol 13 (1) ◽  
pp. 98-104
Author(s):  
Abhinav Yadav ◽  
Md Saifullah Khalid ◽  
Prashant Saini ◽  
Ankit Kumar
Keyword(s):  
Stearic Acid ◽  
Fresh Water ◽  
Potable Water ◽  
Pure Water ◽  
Agricultural Expansion ◽  
Solar Still ◽  
Enhancement Technique ◽  
Solar Desalination ◽  
The World

The necessity of pure water is rising each day, causes are population, industrial and agricultural expansion, worldwide. Due to the increasing population of world the fresh water will become more serious problem in the coming days. Hence, people around the world have to work on different and efficient methodology to generate potable water. Solar still is one among these methods acting device. In this paper, a review of using PCM and PCM with other enhancement techniques has been discussed. Use of stearic acid as a PCM below the liner of basin, each day pure water of 9.005kg/m2 per day and 4.998 kg/m2 per day has been found in the company of PCM and not including of PCM respectively. It is observed that solar desalination system in the company of paraffin-CuO is best among the others solar still with paraffin PCM, paraffin-TiO2, paraffin-GO. CuO, TiO2 and GO are the nanoparticles.

Experimental Investigation on the Performance of Four Types of Solar Stills in Malaysia

2014 ◽  
Vol 567 ◽  
pp. 56-61 ◽  
Author(s):  
Ali Riahi ◽  
Khamaruzaman Wan Yusof ◽  
Mohamed Hasnain Isa ◽  
Balbir Singh Mahinder Singh ◽  
Amirhossein Malakahmad ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Comparative Research ◽  
Potable Water ◽  
Sand Layer ◽  
Water Production ◽  
Solar Still ◽  
Black Paint ◽  
Tropical Condition ◽  
Solar Distillation ◽  
Sea Sand

This study aims at improving a solar distillation still by comparing the performance of four types of double slope single basin solar stills to produce adequate amount of potable water in the areas with confined fresh water. These solar stills fabricated with similar shapes. In each solar still a stainless steel basin with the length of 50 cm, width of 30 cm and depth of 8 cm was utilized. The still configurations differed based on inclusion of 2 cm depth of sea sand layer in the basin, a layer of black paint in the basin and use of a 50 W PV-DC heater. The study was conducted to increase the potable water production under Malaysia tropical condition. A comparative research of cumulative water production among these solar stills showed that solar still with black painted basin was the more efficient; producing 234 %, 190% and 148% the potable water produced by a conventional solar still, solar still with sand layer in basin and solar still connected to a PV-DC heater, respectively.

scholarly journals Effect of heat flow via glazing on the productivity of a solar still

2020 ◽  
Vol 4 (2) ◽  
pp. 54
Author(s):  
Abderrahmane Khechekhouche ◽  
Zied Driss, Benjamin Durakovic .
Keyword(s):  
Drinking Water ◽  
Heat Flow ◽  
Solar Energy ◽  
Pure Water ◽  
Water Shortage ◽  
Solar Still ◽  
Research Topics ◽  
The World ◽  
Flow Through

In many parts of the world, particularly in the Greater Maghreb, desalination of water by solar energy is practiced with incredible abundance. Drinking water shortage has become a major problem. Improving the efficiency of solar distillers in several laboratories around the world is still one of the major concerns of research topics. In this work we want to show that the heat flow through the glazing can also be considered as an index on the productivity of pure water from a conventional solar still.

scholarly journals Experimental investigation of simultaneous effect of parabolic trough collector and flat external reflectors on performance of stepped solar still

2021 ◽  
Author(s):  
Jamasb Pirkandi ◽  
Farshid Kassaei ◽  
Mahdi Hashemabadi
Keyword(s):  
Electrical Conductivity ◽  
Experimental Investigation ◽  
Solar Energy ◽  
Saline Water ◽  
Distilled Water ◽  
Solar Still ◽  
Parabolic Trough ◽  
Parabolic Trough Collector ◽  
Chemical Substances ◽  
Water Output

Abstract In this research, the performance of stepped solar still has been experimentally evaluated. For this purpose, a parabolic trough collector has been used to preheat the saline water entering the solar still. Also, two flat external reflectors have been employed to increase the amount of solar energy received by the steps and the collector of the system. The findings of this research indicate that the use of two flat external reflectors is more effective than using the trough collector. Also, it is more efficient to apply both mechanisms simultaneously than to use them separately. According to the obtained results, the distilled water output of the solar still is 760, 1,560, 2,440 and 2,760 ml/m2, respectively, for operating the conventional solar still, using the trough collector, using the two flat external reflectors, and using the collector and reflectors simultaneously. The electrical conductivity due to the presence of salt and chemical substances dissolved in the distilled water discharged from the still is 255, 215, 62 and 38 micro Siemens per centimetre, respectively, for each of the four mentioned cases. These experiments show that by applying the proposed mechanisms, the amount of distilled water can be increased, and its purity can be enhanced.

Solar Water Distillation Using Two Different Phase Change Materials

2014 ◽  
Vol 592-594 ◽  
pp. 2409-2415 ◽  
Author(s):  
S. Naga Sarada ◽  
Banoth Hima Bindu ◽  
Sri Rama R. Devi ◽  
Ravi Gugulothu
Keyword(s):  
Solar Energy ◽  
Phase Change ◽  
Fresh Water ◽  
Alternative Energy ◽  
Potable Water ◽  
Sea Water ◽  
Underground Water ◽  
Solar Still ◽  
Water Distillation ◽  
The World

In recent years with the exacerbation of energy shortage, water crisis increases around the world. With the continuous increase in the level of greenhouse gas emissions, the use of various sources of renewable energy is increasingly becoming important for sustainable development. Due to the rising oil price and environmental regulations, the demand of utilizing alternative power sources increased dramatically. Alternative energy and its applications have been heavily studied for the last decade. Energy and water are essential for mankind that influences the socioeconomic development of any nation. Pure water resources become more and more scarce every day as rivers, lakes wells and even seawater pollution rapidly increases. Solar energy is one promising solution to secure power and potable water to future generation. The process of distillation can be used to obtain fresh water from salty, brackish or contaminated water. Water is available in different forms such as sea water, underground water, surface water and atmospheric water. Clean water is essential for good health. The search for sustainable energy resources has emerged as one of the most significant and universal concerns in the 21st century. Solar energy conversion offers a cost effective alternative to our traditional usages. Solar energy is a promising candidate in many applications. Among the alternative energy sources used for electricity production, wind and solar energy systems have become more attractive in recent years. For areas where electricity was not available, stand alone wind and solar systems have been increasingly used. The shortage of drinking water in many countries throughout the world is a serious problem. Humankind has depended for ages on river, sea water and underground water reservoirs for its fresh water needs. But these sources do not always prove to be useful due to the presence of excessive salinity in the water. To resolve this crisis, different methods of solar desalination have been used in many countries. Distillation is a well known thermal process for water purification, most importantly, water desalination. Most of the conventional water distillation processes are highly energy consuming and require fossil fuels as well as electric power for their operation. Single basin solar still is a popular solar device used for converting available brackish or waste water into potable water. Because of its lower productivity, it is not popularly used. Numbers of works are under taken to improve the productivity and efficiency of the solar still. There are large numbers of PCMs that melt and solidify at wide range of temperatures, making them attractive in a number of applications. PCMs have been widely used in latent heat thermal storage systems for heat pumps, solar engineering and spacecraft thermal control applications. The use of PCMs for heating and cooling applications for buildings has been investigated within the past decade. The experimental results computed in the field of water distillation process using solar energy in the presence of energy storage materials sodium sulphate and sodium acetate are discussed in this paper. Keywords: solar energy, saline water, distillation, phase change material.

Experimental investigation on the performance of solar still augmented with pin-finned wick

Desalination ◽  
2016 ◽  
Vol 379 ◽  
pp. 10-15 ◽  
Author(s):  
W.M. Alaian ◽  
E.A. Elnegiry ◽  
Ahmed M. Hamed
Keyword(s):  
Experimental Investigation ◽  
Solar Still
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