Performance of single-slope double-basin solar stills with small pile of wick materials

Modi, Kalpesh V.; Modi, Jenish G.

doi:10.1016/j.applthermaleng.2018.12.071

Cited by 119 publications

(23 citation statements)

References 22 publications

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“…The distillate output value at a flow rate of 4 kg/min was higher than that at 2 kg/min. Modi and Modi [34] examined the performance of single-slope double-basin solar stills using jute and black cotton cloths (wick material) placed as a small pile over the absorber plate of solar stills. The experimental results revealed that at basin water depths of 0.01 and 0.02 m, the distillate output values of the solar still with small pile of jute cloth are 18.03% and 21.46% higher than that of a solar still with a small pile of black cotton cloth, respectively.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental performance evaluation of single-slope single-basin solar still with multiple V-shaped floating wicks

Agrawal

Rana

2019

Heliyon

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A solar still is used to convert saline water into potable water by means of the distillation process. In order to improve the productivity of conventional solar still, various modifications are implemented by researchers. In the present study, multiple V-shaped floating wicks are used to enhance heat absorption and thereby increase productivity. The experiments are performed during the summer and winter seasons in Rewa, India (Latitude: 24.5373° N; Longitude: 81.3042° E). These multiple floating wicks are made from black jute cloth wrapped in V-shaped pieces of thermocol. Because of their V-shaped profile, the evaporative surface area of modified solar still is 26% larger than that of conventional solar still. The maximum daily productivity in one of the clear days is found to be approximately 6.20 kg/m 2 in summer and 3.23 kg/m 2 in winter with daily efficiencies of 56.62% and 47.75%, respectively. A theoretical thermal model is formulated by using the energy balance equations of the modified solar still. Reasonable agreement was seen between the theoretical and experimental results of modified solar still. An economic analysis is also performed for the modified solar still and conventional solar still; in a 10-year life cycle, the annual cost of distilled water is estimated at Rs. 1.81/kg for the former and Rs. 2.24/kg for the latter.

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Section: Introductionmentioning

confidence: 99%

Theoretical and experimental performance evaluation of single-slope single-basin solar still with multiple V-shaped floating wicks

Agrawal

Rana

2019

Heliyon

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“…(b) An intermediate insulation layer with a salt slope that creates a compression slope and prevents natural heat transfer through natural convection. (c) Bottom layer with high salt density 11 . If the water is fairly transparent and the bottom of the pool is absorbing high light, almost all solar insolation entering the sun will enter the thermal storage layer of the bottom.…”

Section: Introductionmentioning

confidence: 99%

Practical investigation of usage of nano bottom in the production of fresh water from brackish wastewater in a closed shallow solar basin

Farahbod

2020

Env Prog and Sustain Energy

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Lack of fresh water is a concern for the future of human because commonly used technologies for producing drinking water from saline water, such as reverse osmosis, electrolysis has been expensive to produce and or, like flash techniques and multi‐stage distillation, are dependent on the fossil energies. In this study, the shallow solar basin has been proposed to simply collect and store solar thermal energy to produce drinking water from salt water. Also, the use of nano particles increases the rate of evaporation in the shallow solar basin. In this way, the experiments have been conducted to optimize the efficient factors in the operation of a shallow solar basin equipped with a nano plate at the bottom of the pool. This shallow solar basin is concentrated in saline water and produces distilled water as the main processing stage for distillation of zero discharge. In this way, concentrated saline water prepares the inflow for evaporation units. The main parameters such as insolation rate, values of produced drinkable water and average temperature of shallow solar basin layers are investigated in this study. The comparison between evaporation rate values in a shallow solar basin equipped with nano plates and conventional solar basin shows an increase of 20%. The results show better performance of the proposed shallow solar basin than the simple shallow solar basin. The test results show the maximum and minimum evaporation rates of 5 and 2 L in June and January 2019, respectively.

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“…The result was that the jute cloth enabled solar still enhanced the productivity of the distiller by 62%. Modi and Modi [41] studied the small pack of cotton cloth and jute material on the solar still. The productivity results concluded that the small pack of jute cloth shows the maximum productivity (0.9 L/m 2 day) than small pack of cotton cloths (0.9 L/m 2 day).…”

Section: Introductionmentioning

confidence: 99%

Effect of CuO, MoO3 and ZnO nanomaterial coated absorbers for clean water production

et al. 2020

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Solar energy is one of the most powerful sources for many sustainable applications. Recently, efficient water distillation has attracted significant attention. The fresh water productivity depends on how efficiently the system harvests the incoming solar energy and converts it into useful heat. In the present work, nano-coated absorber plates (NCAPs) were examined in the single slope solar still (SSSS) for clean water production. The NCAPs were CuO, MoO 3 and ZnO, respectively. The CuO-NCAP was fabricated with the thermal evaporation method while the radio-frequency Magnetron Sputtering technique was used to fabricate the MoO 3 and ZnO NCAPs. The attained particle size of the CuO, MoO 3 and ZnO are 30-34 nm, 25-30 nm and 30-35 nm, respectively. The sphere (CuO), plate (MoO 3), and wedge (ZnO) like morphologies are identified with field emission-scanning electron microscope. All the NCAPs and reference solar still were tested under the same environmental conditions. The climatic parameters (solar influx, ambient temperature and wind) and SSSS's temperatures including water temperature (T w), internal air temperature (T int-air), inner cover (T ic), outer cover (T oc), and absorber plate temperature (T NCAP) were measured at 30 min intervals with the help of Type-J thermocouples. Herein, we present an evaporative heat transfer (h ew), efficiency, and cost analysis of the SSSS with CuO, MoO 3 and ZnO-NCAPs. Three different feed waters fetched from the surface well water, hill side well water and hill side pond water were used in this work for evaporation. The result reveals that the evaporation of conventional single slope solar still, CuO, MoO 3 and ZnO NCAPs were 2.1 l/m 2 day, 2.9 l/m 2 day, 2.7 l/m 2 day and 2.6 l/m 2 day, respectively.

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Performance of single-slope double-basin solar stills with small pile of wick materials

Cited by 119 publications

References 22 publications

Theoretical and experimental performance evaluation of single-slope single-basin solar still with multiple V-shaped floating wicks

Theoretical and experimental performance evaluation of single-slope single-basin solar still with multiple V-shaped floating wicks

Practical investigation of usage of nano bottom in the production of fresh water from brackish wastewater in a closed shallow solar basin

Effect of CuO, MoO3 and ZnO nanomaterial coated absorbers for clean water production

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