Different parameter and technique affecting the rate of evaporation on active solar still -a review

Manokar, A. Muthu; Winston, D. Prince; E, Kabeel A.; Sathyamurthy, Ravishankar; Arunkumar, T.

doi:10.1007/s00231-017-2170-9

Cited by 44 publications

(6 citation statements)

References 93 publications

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“…After reaching the boiling point of water, the water evaporates and it condenses on the solar still condenser cover. The various techniques employed in solar still, to raise the temperature of water and hence increases the productivity was studied from the detailed literatures reviews of Ravishankar et al [11], Kabeel et al [12] and Manokar et al [13][14][15]. From the detailed literature studies it is clear that water temperature can be improved by either feeding waste warm water or pre heat the water by incorporating the different solar collectors or concentrators.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of Continuous Heat Extraction from Absorber of Solar Still for Improving the Productivity

El‐Agouz

Kabeel

Subramani³

et al. 2018

Period. Polytech. Mech. Eng.

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IntroductionGreater growth of population and industries results in shortage of fresh water. Earth is almost covered with a larger water source and smaller land mass. People used to drink large amount of water for their thirsty need. Water available in the form of rivers, lakes cannot be consumed directly without pre-processing, as these need some purification process in order to remove bacteria and undissolved salts. In early days the possible method of getting pure water is heating the brackish water and condensing them back to get fresh water by burning fossil fuels. Due to the exhaustion of coal, crude oil and increases in global warming, the evolution of using renewable energy for getting fresh water evolved during the late 20th century. One of the best energy source applied is solar energy. Source of energy from sun is mostly environmental friendly and non polluting clean energy source. Basin type still is the most aged process of producing fresh water [1][2][3][4][5][6][7][8][9][10]. The fresh water conversion rate from the solar still system is predominantly depends on the solar intensity. The basin water temperature increases continuously due to heat energy emitted from the sun in the form of solar intensity. After reaching the boiling point of water, the water evaporates and it condenses on the solar still condenser cover. The various techniques employed in solar still, to raise the temperature of water and hence increases the productivity was studied from the detailed literatures reviews of Ravishankar et al. [11], Kabeel et al. [12] and Manokar et al. [13][14][15]. From the detailed literature studies it is clear that water temperature can be improved by either feeding waste warm water or pre heat the water by incorporating the different solar collectors or concentrators. Gupta et al. [16] theoretically analyzed the intermittent flow of waste warm water to the double basin solar still similarly same analyses was done by Yadav et al. in single basin solar still [17]. Sodha et al. [18] and Tiwari et al. [19] experimentally investigated the performance of solar still utilizing the warm water from the industry. Tiwari et al. [20] keep up a higher temperature difference between the water and collector cover by increasing the water temperature by flowing waste hot water in the basin and decrease the collector cover temperature by flowing the cold water above the surface of collector cover. This would results in increase in both evaporation and condensation

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Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of Continuous Heat Extraction from Absorber of Solar Still for Improving the Productivity

El‐Agouz

Kabeel

Subramani³

et al. 2018

Period. Polytech. Mech. Eng.

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“…Vaporization of water in porous media follows two stages. In the first stage, water flows from the bulk into the pores through capillary actions, and in the second stage, water evaporates and the air-water interface recedes on the pore surface . The air-water interface is vital for water evaporation .…”

Section: Resultsmentioning

confidence: 99%

“…In the first stage, water flows from the bulk into the pores through capillary actions, and in the second stage, water evaporates and the air-water interface recedes on the pore surface. 59 The air-water interface is vital for water evaporation. 60 The vapor phase above the receding air-water interface quickly saturates, resulting in a concentration gradient of water vapor toward the bulk air.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Utilization of Block Copolymers to Understand Water Vaporization Enthalpy Reduction in Uniform Pores

et al. 2022

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Solar desalination, a technique converting solar irradiation to heat for evaporating saltwater and generating freshwater, has garnered much attention because of the evergrowing global demand for potable water. Herein, we utilize block copolymer-based porous carbon fibers with well-controlled porous structures to investigate the latent heat reduction in mesopores and micropores. The porous carbon fibers achieve high energy efficiencies and solar desalination rates up to 3.8 kg m −2 h −1 under 1 sun irradiation owing to the >99% light absorption across the solar spectrum and reduced vaporization enthalpy of poreconfined water. The nanoconfinement effect of pores is evaluated by measuring evaporation enthalpies and rates for morphologically tailored carbon fibers with pore sizes ranging from ∼1 to ∼22 nm. Our results show a continuous reduction in an enthalpic energy of up to 43% as mesopore size decreases to ∼10.7 nm and then less reduction of only 14% with a further decrease in micropore size to <1 nm. The mesopores exhibit significantly enhanced evaporation rates compared with micropores due to the nanoscale confinement-related enthalpy reduction and water transport. This study provides insight into nanoconfinement effects with wellcontrolled pore sizes and contributes to further understanding and design of porous materials for future environmental applications.

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“…This happened due to the low solar radiation in rainy season and obstruct building effected the e ciency of glazing cover collector. Wind ow causes a greater heat transfer from the glazing cover to the environment, thereby lowers the temperature of the glazing cover and increases the temperature difference between the feeder tank and the at plate collector, which speeds up the condensation process and distillation rate (Manokar et al, 2018). It can be concluded that water temperature and heat absorption increase when the e ciency of the at plate collector increases.…”

Section: E Ciency Single Glazing Plate Collector Versus Double Glazin...mentioning

confidence: 99%

“…The FPC is more effective when the water ow rate or velocity at which the water moves through the tube is higher. In addition, it was discovered that the warmest water feasibly led to higher productivity (Manokar et al, 2018). The e ciency for both collector copper and polypropylene will increases gradually with time until reach the maximum e ciency.…”

Section: E Ciency Copper Plate Collector Versus Polypropylene Plate C...mentioning

confidence: 99%

Temperature Analysis of Thermosiphon Solar Water Heaters Using Different Flat Plate Collectors and MATLAB software.

Mahani

Awang

Hamidon

et al. 2023

Preprint

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Solar thermal energy was utilized to heat water for its useful applications. Moreover, solar water heaters have become essential in our lives, and using renewable energy sources is becoming more popular. The current effort is to test and find the effectual solar water heating system. Solar water heater designs have been suggested and produced within two methods whereas forced circulation using a mechanical pump and natural circulation without the use of a pump also recognized as thermosiphon solar water heater. This research was to analyse most efficient Flat Plate Collector (FPC) in terms of heat absorption on Thermosiphon Effect due to energy collection by different colour, material, and glazing. This experiment uses Solar Energy Trainer and MATLAB software to compare the impact of several forms FPC on heat absorption of thermosiphon effect in solar water heater. The most efficient FPC in terms of colour is black collector with higher efficiency of 9.3% compared to white while most efficient FPC in terms of material and glazing are copper and double-glazing collector with 10.86% and 11.15% respectively. The experiment and analysis show that various types of FPC with good heat absorber have higher efficiency.

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Different parameter and technique affecting the rate of evaporation on active solar still -a review

Cited by 44 publications

References 93 publications

Theoretical Analysis of Continuous Heat Extraction from Absorber of Solar Still for Improving the Productivity

Theoretical Analysis of Continuous Heat Extraction from Absorber of Solar Still for Improving the Productivity

Utilization of Block Copolymers to Understand Water Vaporization Enthalpy Reduction in Uniform Pores

Temperature Analysis of Thermosiphon Solar Water Heaters Using Different Flat Plate Collectors and MATLAB software.

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