Effect of water depths on heat and mass transfer in a passive solar still: in summer climatic condition

Tiwari, Anil Kr.; Tiwari, G.N.

doi:10.1016/j.desal.2005.11.014

Cited by 240 publications

(61 citation statements)

References 15 publications

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“…However, for evaluating the values of heat transfer coefficients, the effect of condensing cover material and water depth may also be considered. Tiwari and Tiwari (2006) evaluated the optimum water depth for a passive solar still in summer climatic conditions and also studied the effect of water depth (0.04-0.18 m) on internal heat and mass transfer coefficients. High yield and high efficiency were observed at lower water depth of 0.04 m. Large fluctuation in heat transfer coefficients was reported at lower water depth which was observed to reduce with increase in water depth.…”

Section: Research Conducted On Performance Parameters Of Passive Solamentioning

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: Research Conducted On Performance Parameters Of Passive Solamentioning

confidence: 99%

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

Manchanda¹,

Kumar²

2015

Renewables

View full text Add to dashboard Cite

show abstract

“…(6)) for the simultaneous convective heat and mass transfer. Physical properties of humid-air as function of temperature are presented in Appendix A [11]. where…”

Section: Heat Transfer Analysismentioning

confidence: 99%

“…Many articles focus on the investigation of this effect found that the highest outputs and efficiencies occur at lower depths [10,11]. Reflectors and concentrators are also used to increase water temperature at a faster rate by maximizing the amount of absorbed solar radiation [8,9,12].…”

Section: Introductionmentioning

confidence: 98%

An experimental approach to improve the basin type solar still using an integrated natural circulation loop

Rahmani

Boutriaa

Hadef

2015

Energy Conversion and Management

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“…Tiwari & Tiwari [15] made an attempt to analyze the effect of water depth on evaporative mass transfer coefficient on a passive single slope distillation system in summer climatic conditions. El-Nashar [16] analyzed that performance of a solar desalination plant is influenced by the ability of the glazing system to transmit solar radiation to the collector absorption surface.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on modified single slope single basin active solar still

Sandeep¹,

Kumar

Dwivedi³

2015

Desalination

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Effect of water depths on heat and mass transfer in a passive solar still: in summer climatic condition

Cited by 240 publications

References 15 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

An experimental approach to improve the basin type solar still using an integrated natural circulation loop

Experimental study on modified single slope single basin active solar still

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