Theoretical and experimental investigation on internal reflectors in a single-slope solar still

Estahbanati, M.R. Karimi; Ahsan, Amimul; Feilizadeh, Mehrzad; Jafarpur, Khosrow; Ashrafmansouri, Seyedeh-Saba; Feilizadeh, Mansoor

doi:10.1016/j.apenergy.2015.12.047

Cited by 116 publications

(20 citation statements)

References 41 publications

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“…Abdallah et al [71] found that by using mirrors on the internal walls, the thermal performance of the still was improved by 30%. Karimi et al [72] performed numerical modelling of a still with internal reflectors on front and side walls and observed an 18% increase in the efficiency. The efficiency of a stepped solar still of 53% was increased to 56% by the use of internal reflectors [73].…”

Section: Use Of Reflectorsmentioning

confidence: 99%

A concise review on performance improvement of solar stills

2020

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Conversion of saline water into freshwater by the use of solar thermal energy is known as solar desalination and the devices used for carrying out solar desalination are known as solar stills. The major problem faced by the solar stills is that they have low productivity and therefore unable to meet the high demand for freshwater. Over the years, several researchers have worked on improving the productivity of solar stills. Preheating of feed water, forced convection and energy storage are some of the methods used to increase their efficiencies. Some of these methods are discussed in the present review. The main aim of the current review is to provide the researchers with an idea to select the appropriate method for the improvement in the performance of currently available solar stills.

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Section: Use Of Reflectorsmentioning

confidence: 99%

A concise review on performance improvement of solar stills

2020

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“…Water was the sole element in the still influencing the heat released and the rate of interphase mass transfer. So we studied the water up to two depths 0.05 and 0.07 m and calculated relevant parameters [20].…”

Section: Solar Distillation Without Pcmmentioning

confidence: 99%

“…As we can observe in Figure 2, both of these compounds are on the left corner of the graph with melting temperature near zero or below zero and enthalpy of fusion around 300 MJ/m 3 . Hence, the comparison is rather challenging owning to the similarities between the two compounds [20].…”

Section: Introductionmentioning

confidence: 99%

Water Desalination Using PCM to Store Solar Energy

Kulkarni¹

2020

Thermodynamics and Energy Engineering

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The rising water pollution levels and depleting freshwater sources have formed a delirious inverse proportionality for which the cause is human and effect is also on humanity. A possible solution to this problem is harnessing solar energy to engender thermal energy for solar distillation. Thus solar distillation is one of the potential solutions to asses both the ever-increasing demands for clean water and the inquisition for finding eco-friendly techniques to yield the water. This analysis was undertaken to discover the possible utilization of phase change material on solar distillation in double-slope solar still. The equipment that performs distillation is called "Solar Still." A phase change material (PCM) is a substance that either releases or absorbs energy comparable to the sensible heat during its phase transition to provide useful heat/cooling. Examples of PCM include phenol, paraffin, salt hydrate, and fatty acid. The experiment includes a blank distillate output without PCM, followed by possible optimization on the designed solar still. Solar distillation was performed in the improved solar still with varying types of PCMs. A theoretical model discerning the above phenomena and experiments were performed on the solar still. It was reported that for the yield maximum of water distillate with PCM (Phenol-5 cm) is 370 mL and without PCM is 345 mL, showing a 7.2% increase.

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“…Researchers used sea water [70,72], river water [20], industrial wastewater [20] and synthetic water [69] in the solar still. The water quality result reveals that the parameters greatly improved after evaporation [22,34,51]. The sustainable cost-effective clean water production is the welcome addition for eco-friendly environment.…”

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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Theoretical and experimental investigation on internal reflectors in a single-slope solar still

Cited by 116 publications

References 41 publications

A concise review on performance improvement of solar stills

A concise review on performance improvement of solar stills

Water Desalination Using PCM to Store Solar Energy

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

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