Heat transfer analysis of hybrid active solar still with water flowing over glass cover

Gaur, Manoj Kumar; Tiwari, G.N.; Singh, Pushpendra; Kushwah, Anand

doi:10.18186/thermal.989993

Cited by 3 publications

(2 citation statements)

References 35 publications

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“…Active solar stills supplement distillation with mechanical and external energy sources, whereas passive stills employ natural processes. Water flowing over the glass cover of the PVT hybrid active solar still increases thermal efficiency and daily exergy production, making it suitable for varied climates [13]. While the conventional solar still achieves an optimum hourly efficiency of 62%, the upgraded model achieves an impressive 88%, resulting in a 240% increase in cumulative production [1].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Water Purification in Solar Stills Through Incorporation of Renewable Energy Technology: An Experimental Study on the Efficiency and Cooling Mechanisms - A Review

Najaf,

Aslan

2024

IJHT

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On a worldwide basis, freshwater is becoming increasingly limited, particularly in dry and distant regions. This presents a complex problem for regions such as islands, where the transportation of water that is suitable for drinking is expensive. In order to address this dilemma, the primary focus of the 21st century ought to be on boosting water purification through the use of renewable energy technology in the desalination industry. To be more specific, the incorporation of solar energy into the business has the potential to extend the lifespan of units, reduce expenses, and reduce the positive impact on the environment. The article contains a sufficient number of studies on a variety of passive and active stills, and it offers an understanding of the effectiveness of each form of still. Vacuum tube solar stills are more efficient than others. In addition to this, it investigates several approaches to cooling the glass cover and the elements that influence the productivity of solar stills, among which are environmental and design considerations. Resolving the problem of diminishing freshwater resources and integrating solar energy for water purification.

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Section: Introductionmentioning

confidence: 99%

Enhancing Water Purification in Solar Stills Through Incorporation of Renewable Energy Technology: An Experimental Study on the Efficiency and Cooling Mechanisms - A Review

Najaf,

Aslan

2024

IJHT

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“…Labropulu et al [29] analyzed the impact of unsteadiness parameters on the helper liquid stream to the stagnation point. Sandeep et al [30] researched the impacts of synthetic responses and prompted attractive fields in Jeffrey's nanofluid in the stagnation point stream [30] Recently, the authors [38][39][40][41] Considered the progression of heat transfer in various kind of situation such as stagnation point in a Jeffrey liquid on a greased up surface, vertical flat plate, louvered strip by using Graphene-based nanofluids etc and found it is significant in manufacturing and industrial systems.…”

Section: Introductionmentioning

confidence: 99%

Mixed convective flow of heat and mass transfer of nanofluids over a static wedge with convective boundary conditions

Babu

Ramana

SHANKAR

et al. 2021

Journal of Thermal Engineering

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With the fast improvement of the industry and the utilization of inventive strategies, scientists want to think over the steady blending convection of water-based nanofluids past static wedges. The Buongiorno model with convection is applied. Also, incorporated the Brownian motion and thermophoresis. The attention is on the nature of mixed wedge-formed convective heat and mass transfer of the nanofluid flow. Utilizing comparable change, the governing partial differential equations (PDEs) are reduced to ordinary differential equations (ODEs) solved by the R-K Gill method. The physical quantities of velocity, temperature and concentration fields, as well as diffusion and thermal transfer rates with friction factor coefficients, is discussed. The investigation demonstrated that the temperature convergence of the liquid was higher within the sight of the thermophoresis parameter and Biot numbers. It has been seen that divider pressure increments with expanding wedge and mixed convection parameters.

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Extended experimental investigation of a double-effect active solar still with a paraffin wax, in Owerri, Nigeria

C. NWOSU,

NSOFOR,

N. NWAJI

et al. 2023

Journal of Thermal Engineering

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In this work, an experiment-based study of a double-effect, single-slope active solar still (SSASS) is presented. The system comprises an upper and a lower basin incorporated with a paraffin wax acting as a phase change material (PCM). The use of phase change materials is very important due to their high storage density and the isothermal nature of the storage pro-cess. Paraffin wax was selected based on its attractive thermo-physical properties. The thermal behaviours of the system during the diurnal and nocturnal phases in both compartments were explored. Experimental results showed that the upper basin’s yield contributed more to the overall distillate production over a 24-hour cycle while that of the lower basin predominated the diurnal production. Though the PCM served as an energy source during the nocturnal phase, it did not translate to significant improvement in the yield of the lower basin. The heat retention ability of the lower glazing retarded the condensation of the humid air in the lower compartment during the off-sunshine period. Thus, the nocturnal yield of the system was largely driven by the improved temperature difference between the upper saline water and the upper glazing, as well as the stored thermal energy in the saline water mass before sunset. The system achieved a maximum yield of 2,450 ml/day and a yield rate of 232.5 ml/h. A maximum monthly average yield of 1,787 ml/day was realized in May and a minimum of 692 ml/day in July. Nocturnal distillate production accounted for an average of 55% of the total distillate recovered from the still daily. The system achieved an efficiency range of 12.20 - 32.21%. The cost of freshwater production from the system is estimated at 0.0508 $/L with a payback period of 267 days. Thus, this system is economically viable and suitable particularly, for low-income earners.

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Heat transfer analysis of hybrid active solar still with water flowing over glass cover

Cited by 3 publications

References 35 publications

Enhancing Water Purification in Solar Stills Through Incorporation of Renewable Energy Technology: An Experimental Study on the Efficiency and Cooling Mechanisms - A Review

Enhancing Water Purification in Solar Stills Through Incorporation of Renewable Energy Technology: An Experimental Study on the Efficiency and Cooling Mechanisms - A Review

Mixed convective flow of heat and mass transfer of nanofluids over a static wedge with convective boundary conditions

Extended experimental investigation of a double-effect active solar still with a paraffin wax, in Owerri, Nigeria

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