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Journal ArticleDOI: 10.1007/S11356-021-13126-Y

Effect of fins and silicon dioxide nanoparticle black paint on the absorber plate for augmenting yield from tubular solar still

04 Mar 2021-Environmental Science and Pollution Research (Springer Berlin Heidelberg)-Vol. 28, Iss: 26, pp 35102-35112
Abstract: The present study aims at enhancing the yield of tubular solar still (TSS) by employing fins and coating the absorber plate. We doped the SiO2 nanoparticles into black paint at the weight concentration ranging from 10 to 40%. The solar still was tested in a bright sunny climatic condition of Chennai, Indian (lat. 13° 08′ N and long. 80° 27′ E). Under transient heat flux conditions, water, basin, and TSS glass temperatures with and without fin were measured. The rate of heat transfer by convection between the water and absorber plate was increased. Results revealed that the basin and water temperatures were improved by 10.49% and 10.88%, respectively when using black paint with SiO2 nanoparticle in the concentration of 20%, coated on the absorber plate compared to that when using the ordinary black paint, while using the fins on the absorber plate enhanced the potable water produced by 55.18% when using 20% SiO2 nanoparticle compared to that of conventional TSS. The cost per liter of water produced using the flat and finned absorber coated using 20% SiO2 nanoparticle in black paint is found as 0.0187 and 0.012 $/L respectively.

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Topics: Solar still (51%)
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9 results found


Journal ArticleDOI: 10.1007/S11356-021-14669-W
Fadl A. Essa1, Z.M. Omara1, A.S. Abdullah2, Sengottiyan Shanmugan3  +7 moreInstitutions (7)
Abstract: This paper aimed to improve the thermal performance of the stepped solar still. So, the effects of using different types of basin liners (corrugated and curved basin liners), jute cloth wick, CuO/paraffin wax, and vapor suction on the stepped solar still performance were investigated. The CuO/paraffin wax was placed into a groove parallel to the basin steps’ liner. Also, the stepped distiller was integrated with an external condensation unit. The experimental results revealed that using the corrugated and curved liners increased the productivity of the modified stepped solar still (MSSS) by 42% and 33%, respectively. In addition, using the corrugated liner with wick, corrugated liner with wick and CuO/paraffin wax, corrugated liner with wick, CuO/paraffin wax, and vapor suction improved the freshwater productivity of the distiller by 95%, 127%, and 170%, respectively. At the last studied case (MSSS with corrugated liner, wick, CuO/paraffin wax, and vapor suction), the daily freshwater productivities of the MSSS and conventional still (CSS) were 7000 and 2600 mL/m2·day, respectively. Also, the thermal efficiency of MSSS was calculated as 59% which was obtained at the last studied case. And the efficiency of the CSS was 35%. Besides, the distilled water cost of CSS and MSSS with corrugated liner with wick, CuO/paraffin wax, and vapor suction was 0.023 and 0.014 $/L, respectively.

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Topics: Paraffin wax (59%)

6 Citations


Open accessJournal ArticleDOI: 10.1016/J.CSITE.2021.101368
Abstract: In this work, the performance of tubular solar still (TSS) was aimed to be improved experimentally. Increasing the surface area inside the solar still is a main parameter of its performance. So, a new-designed convex absorber was used for the first time instead of the flat plate absorber to increase the vaporization and exposure surface areas inside the solar still. The TSS with a convex absorber was nominated as convex tubular solar still (CVTSS). In addition, for further improvement of CVTSS performance, two different types of wick materials (jute cloth and cotton wick) were investigated. Moreover, the effect of using TiO2 and graphene nanocomposites on the CVTSS performance was studied. Experimental results obtained that using the convex absorber increased the vaporization surface area by around 21.3%. So, the water distillate of the CVTSS was greater than that of the TSS under all investigated conditions. Besides, using the jute cloth with the CVTSS improved the daily distillate by 114% and 92.5% with and without nanocomposites, respectively. The highest daily productivity of CVTSS was obtained when using jute cloth with nanocomposites, where it was 9000 mL/m2.day versus 4200 mL/m2.day for TSS. Additionally, the average daily thermal efficiency of TSS and CVTSS with jute cloth and nanocomposites was 33% and 50%, respectively. Finally, the proposed design is helpful in enhancing the performance of solar still without any extra horizontal spaces or components.

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Topics: Solar still (54%)

3 Citations


Journal ArticleDOI: 10.1007/S11356-021-13714-Y
Abstract: People around the world are facing water scarcity, and the demand for freshwater is continuously increasing. The purification of water is the only way to satisfy the need for water. Purification can be done in many ways by purifying seawater or by storing rainwater and letting it to the ground. Different types of solar still are there, which are used to increase the output of water produced. Among others, inclined solar still (ISS) is an outstanding solution as it has a wide exterior area of water, having less depth of water to complement the regular potable water production, even the effectiveness of the inclined solar still. A lot of research had been done by increasing the surface area of water. The day to day collection of water from the ISS was found to be 1–8 kg m− 2. In this review, an analysis was made on the current status of different ISS designs to make advance modifications and research to improve the productivity of the ISS to satisfy the increasing demand for potable water. From this investigation, it is identified that active ISS and hybrid ISS are the most effective as compared to other ISS techniques.

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Topics: Solar still (53%), Water scarcity (52%), Rainwater harvesting (51%)

3 Citations


Journal ArticleDOI: 10.1007/S11356-021-15899-8
Abstract: Access to freshwater is narrowed down every day in the world. Many diseases of human beings are related to water supplies contaminated or unpurified. Nowadays, there are massive water shortages in developed and developing nations due to unplanned mechanisms and water pollution caused by human behavior. Water desalination with no impact on the environment is the necessity of the hour. The distillation of saline or brackish water using free solar energy such as solar still is one of the techniques of water purification providing ultrapure distilled water. Besides, solar still is an economical and eco-friendly method, particularly in arid areas. Solar distillers also provide renewable equipment for freshwater productivity. The still design was affected by several operating and environmental factors. The low productivity of the solar still is its major drawback, so many researchers have studied various models to enhance solar still productivity. This paper aims to review the numerous studies of solar still incorporated with rotating parts that are deemed to be effective and efficient design because rotating parts break water surface tension, increase evaporation area, and improve the still performance. Throughout this detailed review, the scholars intend to present, clarify, and analyze the status of several solar distillers with various rotary component arrangements such as a fan, rotating wick, shaft, drum, disc... etc. In addition, based on the entire work, it was confirmed and recommended that the solar still with rotating parts should be continuously followed to supply potable water efficiently and economically. Different results showed the importance of part rotation (best daily yield & improvement) such as vertical disc distiller (16.5 L/m2/d & 617.4%), drum distiller (9.22 L/m2/d & 350%), moving wick solar still (9.17 L/m2/d & 315%), shaft still (0.83 L/m2/d & 39.49%), and vibratory distiller (5.8 L/m2/d & 132%). These important results obtain the importance of embedding rotating parts into the solar stills.

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Topics: Solar still (63%), Solar energy (61%), Solar desalination (59%) ... show more

1 Citations


Open accessJournal ArticleDOI: 10.1007/S11356-021-14359-7
Abstract: In this work, a new attempt was made to study the behavior of the conventional solar still (CSS) by adding a black-painted copper plate and phosphate pellets. Therefore, the performance of the three solar stills has been studied and compared. The first is the CSS, and the second is the modified solar still (MSS). The MSS performance was tested using black-coated copper plate (measuring 49 × 49 cm and 0.2 cm thick) with and without phosphate pellets and compared to the CSS in the similar climatic conditions. The results showed that the combination of black coated copper plate and the inclusion of phosphate pellets improved the evaporation rate and daily productivity. During the experiments, yields using black coated copper plate without and with phosphate pellets were 14.96% and 29.53% greater than the CSS. The effectiveness of the CSS, MSS with copper metal plate (MSS-CP), and MSS with copper metal plate with phosphate pellets (MSS-CP and PP) are around 30.23, 35.3, and 41.44%, respectively.

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Topics: Pellets (56%), Copper (52%)

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36 results found


Journal ArticleDOI: 10.1016/J.RSER.2017.10.108
Abstract: Solar energy systems (SESs) are considered as one of the most important alternatives to conventional fossil fuels, due to its ability to convert solar energy directly into heat and electricity without any negative environmental impact such as greenhouse gas emissions. Utilizing nanofluid as a potential heat transfer fluid with superior thermophysical properties is an effective method to enhance the thermal performance of solar energy systems. The purpose of this review paper is the investigation of the recent advances in the nanofluids’ applications in solar energy systems, i.e., solar collectors (SCs), photovoltaic/thermal (PV/T) systems, solar thermoelectric devices, solar water heaters, solar-geothermal combined cooling heating and power system (CCHP), evaporative cooling for greenhouses, and water desalination.

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187 Citations


Journal ArticleDOI: 10.1016/J.RSER.2016.11.223
Abstract: Water is one of the important sources for the survival of living species on the earth. As earth having only a small amount of water resources for drinking purpose people in rural and urban areas are getting affected by consuming contaminated water that leads to water-borne diseases. Even ground water has to be properly treated before its use for internal consumption. Salt water contains dissolved and undissolved contents and hence it is not suitable for domestic purpose (cleaning, washing, bathing, etc.). This paper completely deals with the detailed review of a solar still integrated to solar collectors for augmenting the yield of fresh water. However, these methods appear to be uneconomical to the middle and low-income families. The yield, economic aspects and payback period of different solar still are reviewed, and a possible conclusion with the integration of low-cost solar water heater and nanofluids in solar water heater are arrived.

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Topics: Solar still (61%), Water resources (54%)

119 Citations


Open accessJournal ArticleDOI: 10.1016/J.APENERGY.2012.09.014
01 Mar 2013-Applied Energy
Abstract: This work reports an innovative design of tubular solar still with a rectangular basin for water desalination with flowing water and air over the cover. The daily distillate output of the system is increased by lowering the temperature of water flowing over it (top cover cooling arrangement). The fresh water production performance of this new still is observed in Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore (11° North, 77° East), India. The water production rate with no cooling flow was 2050ml/day (410ml/trough). However, with cooling air flow, production increased to 3050ml/day, and with cooling water flow, it further increased to 5000ml/day. Despite the increased cost of the water cooling system, the increased output resulted in the cost of distilled water being cut in roughly half. Diurnal variations of a few important parameters are observed during field experiments such as water temperature, cover temperature, air temperature, ambient temperature and distillate output.

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Topics: Water cooling (62%), Solar humidification (60%), Solar still (55%) ... show more

117 Citations


Open accessJournal ArticleDOI: 10.1016/J.RENENE.2015.11.051
01 Apr 2016-Renewable Energy
Abstract: The performance of compound parabolic concentrator assisted tubular solar still (CPC-TSS) and compound parabolic concentrator-concentric tubular solar still (CPC-CTSS) (to allow cooling water) with different augmentation systems were studied. A rectangular saline water trough of dimension 2 m × 0.03 m × 0.025 m was designed and fabricated. The effective collector area of the still is 2 m × 1 m with five sets of tubular still – CPC collectors placed horizontally with north-south orientation. Hot water taken from the CPC-CTSS was integrated to a pyramid type and single slope solar still. Diurnal variations of water temperature, air temperature, cover temperature and distillate yield were recorded. The results showed that, the productivity of the un-augmented CPC-TSS and CPC-CTSS were 3710 ml/day and 4960 ml/day, respectively. With the heat extraction technique, the productivity of CPC-CTSS with a single slope solar still and CPC-CTSS with a pyramid solar still were found as 6460 ml/day and 7770 ml/day, respectively. The process integration with different systems cost was found slightly higher but the overall efficiency and the produced distilled water yield was found augmented.

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Topics: Solar still (61%)

112 Citations


Open accessJournal ArticleDOI: 10.1016/J.SOLENER.2010.03.019
Amimul Ahsan1, Teruyuki Fukuhara2Institutions (2)
01 Jul 2010-Solar Energy
Abstract: In this paper, a new mass and heat transfer model of a Tubular Solar Still (TSS) was proposed incorporating various mass and heat transfer coefficients taking account of the humid air properties inside the still. The heat balance of the humid air and the mass balance of the water vapor in the humid air were formulized for the first time. As a result, the proposed model enabled to calculate the diurnal variations of the temperature, water vapor density and relative humidity of the humid air, and to predict the hourly condensation flux besides the temperatures of the water, cover and trough, and the hourly evaporation flux. The validity of the proposed model was verified using the field experimental results carried out in Fukui, Japan and Muscat, Oman in 2008. The diurnal variations of the calculated temperatures and water vapor densities had a good agreement with the observed ones. Furthermore, the proposed model can predict the daily and hourly production flux precisely.

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Topics: Water vapor (57%), Humidity (57%), Solar still (56%) ... show more

100 Citations


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