Showing papers by "Swellam W. Sharshir published in 2021"
TL;DR: In this paper, the performance of a single basin solar still using two different augmentation approaches was investigated, namely, reduced graphene oxide (RGO) coated absorber plate in solar still and RGO coated absorbber plate along with activated carbon pellet as sensible heat energy storage medium.
66 citations
TL;DR: In this article, five alternative combinations were applied on and under the still basin to enhance tubular solar still performance, and the results showed that the productivity was enhanced by 21.4, 42.77, 58.48, 73.56, and 88.84% for the cases with the previous order.
Abstract: Herein, five alternative combinations were applied on and under the still basin to enhance tubular solar still performance. Firstly, using a v-corrugated aluminum basin. Secondly, adding wick material to the v-corrugated aluminum basin. Thirdly, adding carbon black (CB) nanofluid on wick material located on the v-corrugated aluminum basin (heat localization). Fourthly, using phase change materials (pure paraffin wax) under the v-corrugated aluminum basin integrated with wicks and carbon black nanofluid (1.5 wt.%). Finally, the best case consists of the v-corrugated basin combined with wick, 1.5 wt.% CB nanofluid and CB nanoparticles with 3 wt.% were added to paraffin wax under the basin. The results showed that the productivity was enhanced by 21.4, 42.77, 58.48, 73.56, and 88.84% for the cases with the previous order. For the best case (fifth case), the thermal energy and exergy efficiencies were enhanced by 82.16 and 221.8%, respectively, whereas the cost could be saved by 22.47 %, compared to the conventional tubular solar still. Accordingly, the proposed materials and their combinations led to acceptable and feasible enhancement in the tubular solar still performance due to the improved heat transfer characteristics, and hence the increased evaporation rate.
66 citations
TL;DR: The model investigates the feasibility of different HRSES alternatives and develops a fuzzy-based multicriteria decision-making model for meticulously selecting the optimal energy solution, revealing that the optimal system has the best economic performance among all alternatives.
59 citations
TL;DR: A systematic and conceptual decision-making framework for site suitability and optimal design of HRESs is developed with an application on a regional scale in Kenya, Sub-Saharan Africa and results indicate that the development of solar/wind/diesel/battery HRES is the best sustainable solution to supply the studied region as compared to other feasible alternatives.
56 citations
TL;DR: In this article, the performance of a modified double slope still (MDSSS) was evaluated compared to conventional single slope one (CSS), and the modifications depended on different additives, namely: copper chips, copper oxide nanoparticles/fluid, and paraffin wax as phase change material (PCM).
54 citations
TL;DR: In this article, three alternative combinations were applied in the still basin, which consisted of nanoparticles/fluid (carbon black/water), heat localization (wick), and sensible storage (gravel) materials.
54 citations
TL;DR: In this article, an experimental investigation is carried out to assess solar still performance with a porous absorber made from activated carbon tubes (RACT) with four various arrangements based on energy, exergy, economic, environmental, exergoeconomic (EXC), enviroeconomic (ENC), exergonenvironmental (EXE), and exero-enviro economic (EEC) points of view.
53 citations
TL;DR: In this paper, the potential of using machine learning to predict the solar still performance and analyze the importance of different factors of systems and materials were discussed, and several important points for challenges of solar evaporation investigations were also discussed.
52 citations
TL;DR: In this article, accurate and convenient prediction models of tubular solar still performance, expressed as hourly production, were developed by utilizing machine learning, such as random forest, artificial neural network, and multilinear regression.
51 citations
TL;DR: In this article, a new hybrid desalination unit combining two common techniques of high freshwater production: humidification-dehumidification (HDH), and reverse osmosis (RO) was designed for low power consumption.
48 citations
TL;DR: It was concluded that the addition of V-shape concentrator and minimum water depth is useful to augment the energy efficiency, exergy efficiency, and yield of the SS in the very economical way.
Abstract: Solar desalination is one of the most sustainable solutions to produce freshwater from brackish water. The present research work aims to experimentally investigate the effect of a V-shape concentrator integrated with solar still (SS). The V-shape concentrator integrated with the conventional solar still (CSS) is used to supply the saline water at elevated temperature to the basin of SS, which augments the freshwater yield compared to CSS. The experimental investigation was performed at different brackish water depths of 0.01, 0.02, and 0.03 m, respectively. The SS system was evaluated based on water yield, energy, exergy, concentrator efficiency, and economic analysis. The freshwater yield of the solar still integrated with V-shape concentrator (SSVC) was found to be 5.47, 5.10, and 4.89 L/m2.day, whereas the yield of the CSS was 3.73, 3.27, and 2.91 L/m2 .day at the water depths of 0.01, 0.02, and 0.03 m, respectively. The daily energy and exergy efficiency of CSS were 38.5, 33.5, and 29.4% and 1.9, 1.5, and 0.97 % in the case of 0.01, 0.02, and 0.03m water depth , respectively. However, the integration of concentrator significantly augmented the energy efficiency to 57.4, 51.7, and 44.9% and exergy efficiency to 3.8, 3.3, and 2.8% for the respective water depths . Life cycle studies demonstrated that the freshwater cost per liter for CSS and SSVC were 0.0102 $ and 0.0117 $ respectively, at a water depth of 0.01 m. It was concluded that the addition of V-shape concentrator and minimum water depth is useful to augment the energy efficiency, exergy efficiency, and yield of the SS in the very economical way.
TL;DR: In this article, a tubular solar still (TSS) was developed via pure and nano-coated (with carbon black nanoparticles) mushrooms, where pure mushrooms were used due to their structure that allows effective vapor generation through achieving good solar absorptivity, capillary effect, and heat localization on the surface.
TL;DR: In this paper, a comprehensive review of the recent developments of reverse osmosis plants considering all the aforementioned parameters is presented, including specific energy consumption, freshwater cost, thermal efficiencies, configurations, water recovery factors, and water quality.
TL;DR: In this paper, a novel method of augmenting the water productivity of the desalination unit using sea-water as the feed water through integrating a parabolic trough collector and activated carbon pellet (a highly porous energy storage material) to improve the rates of evaporation and water production was explored.
TL;DR: In this article, the absorber plate of a single basin solar still is coated by black paint doped with reduced graphene oxide (RGO) nanosheet having a mass fraction of 4-12-wt, to augment the water yield.
TL;DR: In this article, the authors investigated the potential and feasibility of an integrating hybrid renewable power generation system with a large-scale reverse osmosis desalination plant to provide electricity, heat, and water for the New Capital International Airport, Egypt.
TL;DR: In this article, a critical review of the recent advancements in graphene-based composite anode materials for SIBs focusing on synthesis and energy storage techniques is presented, where the characteristics of various compositions and their energy storage behaviors are elaborately discussed and summarized.
Abstract: The limited availability of lithium is hindering the high demand of lithium-ion batteries (LIBs) resulting from rapid development in electric vehicle technology. Sodium-ion batteries (SIBs) are considered potential alternatives for LIBs owing to the large availability of sodium resources, low cost, and their similar electrochemical properties to LIBs. SIBs are also considered promising options for large-scale next-generation energy storage systems. In the last few decades, extensive research has been conducted to identify suitable anode materials for the high performance of SIBs. Among the carbonaceous materials, graphene exhibited excellent physical and chemical properties for utilization as the anode material, such as high specific surface area, energy storage density, and electric conductivity. The construction of composite anode materials through the incorporation of graphene with metal oxides and metal sulfides shows promising overall performance in SIBs. This paper critically reviews the recent advancements in graphene-based composite anode materials for SIBs, focusing on synthesis and energy storage techniques. The characteristics of various compositions and their energy storage behaviors are elaborately discussed and summarized. In addition, certain major challenges and advantages in graphene-based composite as a future anode materials for SIBs are discussed. This critical review illuminates a path to achieve economic, safe, and energy-efficient graphene composites as anode materials for SIBs.
TL;DR: In this paper, the authors presented an enhancement in wick solar stills performance depending on using different aspect ratios with the same project area and wick materials, glass cover cooling, and external reflectors after practical knowledge of the best wick material type and dimensions.
Abstract: The present study presents an enhancement in wick solar stills performance depending on using different aspect ratios with the same project area and wick materials, glass cover cooling, and external reflectors after practical knowledge of the best wick material type and dimensions. The proposed three stills (A), (B), and (C) have evaporation area dimensions of 1 × 0.85, 1.5 × 0.57, and 2 × 0.425 m2, with an aspect ratio of 1.18, 2.63, and 4.71, respectively. The results revealed that the solar still with medium dimensions set has the best performance. Also, adding a top and bottom reflector to type (B) solar still with cotton cloth wicks increased the freshwater productivity and energy efficiency by 37.99 and 39.96%, respectively, compared to type (A) solar still with cotton cloth wicks. Moreover, the cost of one liter of freshwater distillate was decreased by 1.82%. Applying glass cover cooling on type (B) solar still with cotton cloth wicks increased the freshwater productivity and energy efficiency by 30.59 and 33.13%, respectively, compared to type (A) solar still with cotton cloth wicks. Furthermore, we have a decrement in the cost of one liter of freshwater distillate by 7.69%. Moreover, adding reflectors and cover cooling together to wick solar still increased the freshwater productivity and energy efficiency by 52.36 and 58.5%, respectively. On the other hand, the cost per liter of freshwater was reduced by 9.8%.
TL;DR: In this paper, a novel hybrid nanomaterial (HNM) (GO@CuO) was manufactured where the thermal and electrical performances were comprehensively appraised investigated, and the results confirmed the formation and loading of NM QDs successfully on the GO surface.
TL;DR: In this paper, the thermal performance of nano-enhanced phase change material (PCM) was investigated under direct/indirect solar exposure and outdoor experiments, under direct and indirect solar exposure.
Abstract: In this piece of work, an attempt to solve the global energy crisis by presenting advanced thermal energy storage technology was experimentally investigated. To enhance the thermal performance of paraffin wax as phase change material (PCM), nanoparticles (NPs) were utilized at 3% wt. concentration in mono and hybrid form: copper oxide (CuO) NPs, cobalt oxide (Co3O4) NPs, and CuO@Co3O4 nanocomposite (NC). All the fabricated materials were detailly characterized via SEM, TEM, XRD, FT-IR, and DSC analyses. Beyond, outdoor experiments, under direct/indirect solar exposure, were conducted to determine the thermal performance of the nano-enhanced PCM specimens compared to pure PCM. For each experiment, direct/indirect solar absorption, four specimens were prepared: pure paraffin wax, nano-CuO-enhanced paraffin wax, nano-Co3O4-enhanced paraffin wax, and nano-CuO@Co3O4-enhanced paraffin wax. As result, all nano-based PCM cases had better performance than pure PCM. Among them, the nano-CuO@Co3O4-enhanced PCM recorded the highest temperature, at noon, with an enhancement ratio of 14.15% compared to that of pure paraffin wax.
TL;DR: A general view about IRTG is presented and its utilization in condition monitoring of PV plants is focused on, merging the state-of-the-art researchers' efforts in this field.
TL;DR: In this article, the authors present a critical review on transmission of SARS-CoV-2 in wastewater and the potential remedial strategies to effectively control the viral spread and safeguard society.
TL;DR: In this article, a flat solar still (FSS) is proposed to improve the performance of solar still, which has a working principle similar to the solar cell and is much more compact than the inclined solar still.
TL;DR: In this article, a modified solar still with three different microparticles doped in black paint-coated absorber were designed, fabricated, and tested in Jaipur, India.
Abstract: This study aims to augment the performance of a solar desalination unit. To experimental examine this idea, a modified solar still with three different microparticles doped in black paint-coated absorber were designed, fabricated, and tested in Jaipur, India. Three different microparticles such as copper, aluminum, and tin with particle size of 50–80 μm with weight concentration of 10% were doped in black paint and then coated on the absorber of solar still. The coated absorber of solar still were compared with the conventional solar still without any microparticle coating to obtain the effect of different coating materials on the water productivity, thermal performance, economic, and environment-economics analysis of solar still. The result showed that under the water depth of 1 cm, coating of copper, aluminum, and tin on absorber augmented the full-day water yield by 33.13, 22.18, and 11.53%, compared to conventional solar still without any coating. In addition, full-day energy and exergy efficiency of solar still with copper-coated absorber exhibited maximum values compared to all other solar stills, owing to the higher thermal conductivity and excellent solar-thermal conversion behaviors of copper. The cost of water per liter estimated through economic analysis was found to be US $ 0.0074 for conventional solar still, which was significantly reduced to US $ 0.0066 in the case of solar still with copper-coated absorber along with the payback time of 2.7 months. The environment-economic assessment estimated that solar still with copper-coated absorber plate has reduced the 13.19 tons of CO2 emission. It is concluded that augmented heat transfer rate from water basin to inner glass surface through utilization of microparticle coating would pave a pathway to develop energy-efficient low-cost solar-based desalination system.
TL;DR: In this article, a 3D re-normalization group (RNG)/k-ϵ with enhanced wall treatment is chosen considering the conjugate heat transfer between the fluids.
TL;DR: In this article, the conducted efforts to improve the solar photovoltaic (PV) performance using nano-based cooing systems were reviewed and discussed, and the surveyed PVs' cooling methodologies were classified into separate and hybrid systems: nano-enhanced PCMs, nanofluid-based, and hybrid nanobased cooling units.
16 Mar 2021
TL;DR: It is found that thermal design is the most significant descriptors to obtain a high efficiency in solar evaporation, and may promote the enhancement of production and efficiency of solar stills.
Abstract: Enhancing the efficiency of solar still is important for solar stills. In this study, the weighted values of environment factors (descriptors) on the efficiency of solar evaporation are obtained by using a machine learning algorithm, random forest. To verify the advancement between random forest and mathematical data analysis, two traditional methods, pair wise plots and Pearson correlation analysis, are conducted for comparison. Experimental data are obtained from around 100 articles since 2014. The results indicated that traditional methods failed at obtaining reasonable weighted values, while random forest is competent. It is found that thermal design is the most significant descriptors to obtain a high efficiency. The lack of complete dataset is the main challenge for more in-depth and comprehensive analysis. This work may promote the enhancement of production and efficiency of solar stills.
TL;DR: In this paper, the authors presented the enhanced thermal, economic, and environmental performances of single slope solar still utilizing eco-friendly and available materials, namely: floating coal, cotton fabrics, and carbon black nanoparticles.
TL;DR: In this paper, the authors investigated the optimization of solar stills (SSs) productivity under different levels of solar radiation intensity, film cooling flow rate and water depth, and the results showed that increasing the solar radiation and water film cooling improved the productivity.