A new trapezoidal pyramid solar still design with multi thermal enhancers

Sharshir, Swellam W.; Rozza, M.A.; Joseph, Abanob; Kandeal, A.W.; Tareemi, Ahmad A.; Abou-Taleb, Fawzy Shaban; Kabeel, A.E.

doi:10.1016/j.applthermaleng.2022.118699

Cited by 40 publications

(5 citation statements)

References 94 publications

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“…A. Essa, Alawee, et al, 2021;Fayaz et al, 2022;Jobrane et al, 2021Jobrane et al, , 2022Modi, Maurya, et al, 2022;Modi, Patel, et al, 2022;Modi & Modi, 2019;Negi et al, 2022;Omara et al, 2013;Sharshir, Eltawil, et al, 2020;Zaheen Khan, 2022), water pumps (Abozoor et al, 2022; M. M. Z. Kumar et al, 2014), rotating belts (Al-Otoom & Al-Khalaileh, 2020;Saeed et al, 2022), -glass cover cooling (Elashmawy, 2019;Kousik Suraparaju & Kumar Natarajan, 2022;Sharshir et al, 2017;Sharshir, Rozza, Joseph, et al, 2022;Sibagariang et al, 2022), s -the use of heat storage materials such as latent heat storage or phase change material (PCM) and sensible heat storage (H. Alharahsheh et al, 2018;Al-Harahsheh et al, 2022;Chandrashekara & Yadav, 2017;Deshmukh & Thombre, 2017;Elashmawy & Ahmed, 2021;Jafari Mosleh & Ahmadi, 2019;Mohanraj et al, 2021;Poonia et al, 2022;Saeed et al, 2022;Shoeibi, Kargarsharifabad, Mirjalily, et al, 2022), -breaking water surface tension by using cracked trays, air bubbles, water vaporizers, and foggers (Abed et al, 2021;Dumka & Mishra, 2020;El-Said et al, 2021;El-Said & Abdelaziz, 2020;Fallahzadeh et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…As a result, the freshwater productivity of the solar still with PCM was 4.5 L/day against 4.1 L/day for the solar still without PCM. Sharshir et al (Sharshir, Rozza, Joseph, et al, 2022) carried out experiments on a new trapezoidal pyramid solar still augmented with multi-thermal enhancers such as hang wicks, glass cover cooling, solar concentrators, and nanofluid (copper oxide, CuO). The results showed freshwater productivity, energy and exergy efficiencies of the system compared to those of the conventional solar still were improved by 147.3%, 144.2%, and 275.5%, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical Performance Assessment of a Parabolic Trough Humidifying Solar Collector-Based Solar Still

Welepe,

Günerhan,

Bilir

2024

Isı Bilimi Ve Tekniği Dergisi

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In this paper, a parabolic trough humidifying solar collector-based solar still (PHSC-SS) is proposed. Its purpose is to apply some important performance improvement techniques to the flat plate humidifying solar collector-based solar still (flat plate HSC-SS), to significantly improve overall system performance. These included the use of parabolic trough solar concentrators and the design of humidifying solar collectors from evacuated tube collectors. The results reveal that, unlike flat plate HSC-SS, which must operate with a turbulent airflow regime to achieve optimum overall performance, PHSC-SS must operate with a laminar airflow regime and high inlet and outlet temperatures of air (at least 55 °C and less than 100 °C, at atmospheric pressure) in the heat collector element. For 900 W/m2 of incident solar irradiance, 2 m2 of solar collector area, and 0,00042 kg/s of air flow rate, the maximum energy efficiency, exergy efficiency and daily freshwater productivity of PHSC-SS were found to be 68,12%, 14,87% and 1,697 kg/h, respectively. Whereas for the same incident solar irradiance and solar collector area, and 0,1 kg/s of air flow rate, those of the flat plat HSC-SS were 72,9%, 1,12%, and between 1,07 – 2,923 kg/h (for inlet and outlet temperatures of air less than 30 °C, at atmospheric pressure), respectively. Although in some extreme cases freshwater productivity of flat plate HSC-SS can be higher than that of PHSC-SS, it should be noted that laminar airflow regime confers great advantages to PHSC-SS. These are higher air temperatures at condenser inlet (which ease water condensation process), no need of an auxiliary cooling device (needed in the flat plate HSC-SS), less mechanical vibrations of system, reduced condenser size, and less energy consumed by air blowers. Furthermore, the upper limit of the PHSC-SS is a PHSC-SS that operates without air flow, but rather by vaporization of water droplets at boiling point from absorber, followed by their suction to condenser, similarly to a flash evaporation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical Performance Assessment of a Parabolic Trough Humidifying Solar Collector-Based Solar Still

Welepe,

Günerhan,

Bilir

2024

Isı Bilimi Ve Tekniği Dergisi

View full text Add to dashboard Cite

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“…In the face of an energy crisis and resource shortages, solar energy, as a permanent and universal energy source, has become one of the keys to solve the problem. Solar energy is widely used in photothermal conversion [ 1 , 2 , 3 ], photovoltaic devices [ 4 , 5 , 6 ], and so on. Ultra-strong light absorption interface can greatly improve the energy utilization rate.…”

Section: Introductionmentioning

confidence: 99%

Thermal-Assisted Laser Fabrication of Broadband Ultralow Reflectance Surface by Combining Marangoni Flow with In Situ Deposition

et al. 2023

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Functional surfaces with broadband ultralow optical reflectance have many potential applications in the fields of enhancing solar energy utilization, stray light shielding, infrared stealth, and so on. To fabricate broadband anti-reflection surfaces with low cost, high quality, and more controllability, a strategy of preparing multi-scale structures by thermal-assisted nanosecond laser was proposed. This strategy combines laser ablation with Marangoni flow of molten materials and in situ deposition of nanoparticles. The thermal-assisted strategy increases the depth to width ratio of the anti-reflection structures. The average reflectance of laser-textured TC4 (Ti-6Al-4V) surface is as low as 1.71% in the wavelength range of 200–2250 nm and 7.8% in the 2500–25,000 nm. The ultra-low reflectance surface has a significantly enhanced photothermal conversion performance. Meanwhile, the anti-reflection effect can be extended to the mid-infrared band, which has potential stealth application prospect. This synergetic manufacturing strategy has wide adaptability of materials, which provides new paths for the preparation of broadband ultralow reflectance surface. Moreover, this thermal-assisted laser fabrication strategy is prospective in the preparation of other functional micro-nano structures.

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“…The hybrid system resulted in a daily water production rate that was 24% higher than the production of a passive one. However, nanotechnology was proposed in recent studies [7,8,11,12,[21][22][23][24][25] to enhance the performance of triangular solar stills. Goshayeshi et al [26] conducted a novel approach involving a mixture of paraffin and graphene oxide nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Deep Neural Networks Based Modeling to Optimize Water Productivity of a Passive Solar Still

Halimi,

Cherrad,

Belhadj

et al. 2023

JERA

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Solar stills (SSs) have emerged as highly efficient solutions for converting saline or contaminated water into potable water, addressing a critical need for water purification. This study aims to predict and optimize SS performance, emphasizing the importance of enhancing productivity in various applications, including domestic, agricultural, and industrial settings. Several influencing factors, such as sunlight intensity, ambient temperature, wind speed, and structural design, are crucial in determining SS performance. By harnessing the power of contemporary machine learning techniques, this study adopts Deep Neural Networks, with a special emphasis on the Multilayer Perceptron (MLP) model, aiming to more accurately predict SS output. The research presents a head-to-head comparison of diverse hyperparameter optimization techniques, with Particle Swarm Optimization (PSO) notably outpacing the rest when combined with MLP. This optimized PSO-MLP model was particularly proficient when paired with a specific type of solar collector, registering impressive metrics like a COD of 0.98167 and an MSE of 0.00006. To summarize, this research emphasizes the transformative potential of integrating sophisticated computational models in predicting and augmenting SS performance, laying the groundwork for future innovations in this essential domain of water purification.

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A new trapezoidal pyramid solar still design with multi thermal enhancers

Cited by 40 publications

References 94 publications

Theoretical Performance Assessment of a Parabolic Trough Humidifying Solar Collector-Based Solar Still

Theoretical Performance Assessment of a Parabolic Trough Humidifying Solar Collector-Based Solar Still

Thermal-Assisted Laser Fabrication of Broadband Ultralow Reflectance Surface by Combining Marangoni Flow with In Situ Deposition

Deep Neural Networks Based Modeling to Optimize Water Productivity of a Passive Solar Still

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