Performance of floating cum tilted-wick type solar still with the effect of water flowing over the glass cover

Janarthanan, B.; Chandrasekaran, J.; Kumar, S.

doi:10.1016/j.desal.2005.08.005

Cited by 104 publications

(20 citation statements)

References 5 publications

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“…Effect of glass cover cooling and hot water recirculation could also be investigated for the ISWD system. Janarthanan et al (2006) examined the performance of the tilted wick type solar still with water flow over the glass cover (Fig. 15).…”

Section: Effect Of Wicking and Dyesmentioning

confidence: 99%

A comprehensive decade review and analysis on designs and performance parameters of passive solar still

Manchanda¹,

Kumar²

2015

Renewables

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The simplest and easily accessible type of solar distillation is passive solar still which utilizes freely and abundantly available sun energy for removal of salinity/impurity from saline/brackish water. The main drawback of passive solar still is its lower efficiency and distillation output. Different designs of passive solar stills are fabricated and tested by various researchers to meet water demand economically. Concave wick basin pyramidal-shaped solar still was observed to produce 4.0 l/m 2 /day average distillate with a cost of 0.065$/l. Double basin solar still showed an average of 85 % higher yield than single basin still. Stepped type, inclined, tubular, pyramidal, spherical, and hemispherical shapes were considered an efficient designs of passive solar still. Numbers of parameters such as water depth, solar radiation, ambient conditions, condensing cover material, its cooling and direction, internal and external reflectors, sun tracking system, wicks, thermal and energy storage materials were outlined which highly affect the performance of solar still. Water depth of 0.04 m and condensing cover inclination to latitude of the place were observed optimum operational parameters. A distillate output of 4.3 l/m 2 was collected with cotton gauge top cover cooling to V-type solar still. Increase of 75 % in productivity and 56 % in daily efficiency was observed with internal reflector stepped solar still. An improvement of 380 % was observed in stepwise basin solar still integrated with sun tracking system. Despite large efforts carried out on passive solar distillation, there are some challenges like bulkiness, high initial cost, and optimization of spacing between condensing cover and water surface of inclined still, thermophysical properties of basin material, flow rate, insulation material and its thickness, which need to be improved to make this technique efficient in practical utilization. This review paper mainly presents the results of previous work carried out on the designs, operational and process parameters affecting distillation, cost analysis, further scope of improvement in preceding work along with their limitations. The decade reviews on solar stills based on different context authored by many researchers have also been summarized. Moreover, this review paper will help the researchers to understand the basics of solar still with the need, developments and challenges in passive solar distillation to improve its thermal performance.

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Section: Effect Of Wicking and Dyesmentioning

confidence: 99%

A comprehensive decade review and analysis on designs and performance parameters of passive solar still

Manchanda¹,

Kumar²

2015

Renewables

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“…The evaporative heat transfer co-efficient between water and glass is obtained, [9] h e;w-g ¼ ½16:273 Â 10 À3 h c;w-g ½p w À p g =½T w À T g ð 17Þ…”

Section: Single Basin Solar Stillmentioning

confidence: 99%

“…The effect of a water film cooling the glass cover was studied on a single basin and it was found that the proper use of the film-cooling parameters may increase the still efficiency by up to 20%. The optimum flow rate of the cooling water over the glass cover was found to be 1.5 m/s [9]. Nafey et al [10] investigated on the main parameters affecting the performance of the solar still.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of fin type solar still integrated with fin type mini solar pond

Appadurai¹,

Velmurugan²

2015

Sustainable Energy Technologies and Assessments

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“…To maintain uniform thickness of water, a wick, which draws water through capillary effect, is used [2,[4][5][6]. In an inclined still, water flows from the top to the bottom of the absorber surface.…”

Section: Introductionmentioning

confidence: 99%

“…It can be done either by active or passive methods. This can be done by water flowing over the condensing cover, i.e., the regenerative effect [2]. Several pilot plants have been realized mainly for scientific and research purposes in different areas and experimental investigations have been carried out in order to study different configurations for a solar still, to increase the efficiency of the unit, to minimize the use of feed water and the energy consumptions.…”

Section: Introductionmentioning

confidence: 99%

An investigation of some of the parameters involved in inclined solar distillation systems

Deniz

2012

Env Prog and Sustain Energy

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There are two main problems of inclined solar water distillation systems. There is not a water film layer enough to facilitate the evaporation of water on the absorber plate, and high temperature of glass cover decreases the amount of condensed water. In this article, an inclined solar water distillation system was designed and tested under actual environmental conditions of Turkey in order to overcome these two main problems. Therefore, with this study, improving of inclined solar water distillation system performance was investigated. The system was tested with four variants: bare plate (BP), shaded bare plate (SBP), black‐cloth wick (BCW), and shaded black‐cloth wick (SBCW). Experimental studies showed that the use of bare cloth wick, shading plate, and both together increase the system efficiency by 3, 2, and 5% respectively. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 350‐354, 2013

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Performance of floating cum tilted-wick type solar still with the effect of water flowing over the glass cover

Cited by 104 publications

References 5 publications

A comprehensive decade review and analysis on designs and performance parameters of passive solar still

A comprehensive decade review and analysis on designs and performance parameters of passive solar still

Performance analysis of fin type solar still integrated with fin type mini solar pond

An investigation of some of the parameters involved in inclined solar distillation systems

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