Experimental performance evaluation of single basin dual slope solar still with circular and square cross-sectional hollow fins

Jani, Hardik K.; Modi, Kalpesh V.

doi:10.1016/j.solener.2018.12.054

Cited by 164 publications

(41 citation statements)

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“…They found that the sponge thickness of 0.5 cm produced about 58% higher water output as compared to base model. Various techniques [3][4][5][6][7][8] have been used for improving still performance such as fins, multi-basin solar stills, use of solar chimneys for desalination, use of nanofluids and use of energy storage system. It is found that that the use of fins could increase the ABSTRACT -Acute shortage of drinking water has been on the rise owing to increasing population as well as shortage of drinkable water.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the influence of glass cover cooling using evaporative cooling process on the thermal performance of single basin solar still

Shivamallaiah¹,

Reddy²,

Shrikanth³

et al. 2020

JMES

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Acute shortage of drinking water has been on the rise owing to increasing population as well as shortage of drinkable water. Generation of potable water using passive solar stills is among the simplest and easier devices which make use of solar heat energy. However, the output of solar still is generally low owing to greater heat loss and needs improvement. In this paper, an experimental analysis is carried out to determine the performance of passive solar still with glass cover cooling using cold water generated using passive evaporative cooling process. The cold water required for cooling the glass cover is obtained using evaporative cooling process in the water tank which is wound with wet cotton cloth wick. The cold water thus obtained is sprayed onto the top surface of glass cover. The experiment is carried out in the outdoor conditions of Dubai from 10:00h to 14:00h and the temperature recordings of basin plate, glass cover, basin water, ambient air and cooling water are noted for every 30 minutes. The results reveal that the average increase in condensation heat transfer coefficient is found to be about 20.8% higher in the presence of glass cover cooling and the distillate output is found to increase by about 3.32 times. The average still efficiency is found to be relatively higher in the presence of cooling which is about 7.3% higher in the presence of cooling. The cold water temperature generated through evaporative cooling process is about 20.4% lower as compared to ambient temperature. Thus, the cooling of glass cover using cold water obtained through evaporative cooling process is found to be effective in enhancing the thermal performance of single basin solar still system.

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Section: Introductionmentioning

confidence: 99%

Experimental study of the influence of glass cover cooling using evaporative cooling process on the thermal performance of single basin solar still

Shivamallaiah¹,

Reddy²,

Shrikanth³

et al. 2020

JMES

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show abstract

“…Water is the one of the prime constituents on the earth and available in abundant amount. 4 The impurities lying in the water can be removed through the solar desalination system. 1 Out of that 2.5%, a large share is inaccessible because of being frozen in polar region.…”

Section: Introductionmentioning

confidence: 99%

“…2 Merely 2.5% of entire water reserve of the earth is fresh, and the remnant 97.5% is the brackish water. 4 Among available methods, HDH desalination is very promising means for small-scale water requirements. Additionally, a significant part of the mankind has no availability of potable water.…”

Section: Introductionmentioning

confidence: 99%

“…2 Except HDH, the cost linked with energy utilization of all above methods is huge and also has atmospheric issues because of the usage of nonrenewable fuels. 4 The impurities lying in the water can be removed through the solar desalination system. 4 Among available methods, HDH desalination is very promising means for small-scale water requirements.…”

Section: Introductionmentioning

confidence: 99%

“…4 The impurities lying in the water can be removed through the solar desalination system. 4 Among available methods, HDH desalination is very promising means for small-scale water requirements. 5 The HDH systems have many advantages like simple and adaptable nature, beneficial easy finances, and capability to utilize low-grade energy like waste heat 6 and solar energy.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical and experimental investigation of bubble column humidification and thermoelectric cooler dehumidification water desalination system

Patel

2019

Int J Energy Res

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The desalination of adulterated water for potable water is very important and in-demand because of the scarcity of the potable water. The bubble column (BC)-type humidification-dehumidification (HDH) desalination systems have shown promising results for low quantum need of fresh water. The present work consists of bubbler humidifier for increasing the humidity of atmospheric air and thermoelectric cooling (TEC) modules for the dehumidification of the humidified air. The air and water have been heated through external device for the sake of performance enhancement. The work of the proposed HDH system has been assessed experimentally as well as theoretically in order to identify the impact of system operational parameters like temperature of air and water, diameter of hole on the periphery of circling tube, height of hot water column, and the air mass flow rate on the production of fresh water.The daily distillate production achieved during the investigation was in the range of 7 to 13 L/d for different operational parameters although the best experimental productivity of the system was reported 12.96 L/d for 2 mm of hole diameter, 0.016 kg/s of air mass flow rate, 60°C of temperature of water, 27°C of temperature of air, and 7 cm of water column height in the humidifier.The gained output ratio of the system was 0.8 for 0.016 kg/s of mass flow rate of air. A theoretical model of the system is also proposed, and results of model are validated against experimental results, which have shown the great agreement.Nomenclature Notation: A, water area, m 2 ; a s , specific surface area, 1/m; C p , specific heat, J/kg K; D, diameter, m; d o , diameter of hole on spiral tube, mm; D AB , diffusion coefficient, m 2 /s; G, gravitational acceleration, m/s 2 ; h, specific enthalpy, J/kg; h fg , latent heat of evaporation, J/kg; h t , heat transfer coefficient, W/m 2 , air superficial velocity, m/s; V c , liquid circulation velocity, m/s; V b , bubble velocity, m/s; V, volume of bubble column, m 3 ; W, specific humidity, kg/kg of dry air; x, mass flow rate, kg/s; z, height of water column in humidifier, cm Greek letters: ε, void fraction; Ρ, density, kg/m 3 ; σ, surface tension of water, N/m; α, Seebeck coefficient, V/K Subscript: 1, air at humidifier inlet; 2, air at humidifier outlet (dehumidifier inlet); 3, air at dehumidifier outletHow to cite this article: Patel V, Patel R, Patel J. Theoretical and experimental investigation of bubble column humidification and thermoelectric cooler dehumidification water desalination system. Int J Energy Res. 2020;44:890-901. https://doi.org/ 10.1002/er.4931

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Review on Productivity Enhancement of Passive Solar Stills

Suraparaju

Natarajan

2022

Renewable Energy Technologies

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Experimental performance evaluation of single basin dual slope solar still with circular and square cross-sectional hollow fins

Cited by 164 publications

References 30 publications

Experimental study of the influence of glass cover cooling using evaporative cooling process on the thermal performance of single basin solar still

Experimental study of the influence of glass cover cooling using evaporative cooling process on the thermal performance of single basin solar still

Theoretical and experimental investigation of bubble column humidification and thermoelectric cooler dehumidification water desalination system

Review on Productivity Enhancement of Passive Solar Stills

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