Productivity enhancement of solar still through heat transfer enhancement techniques in latent heat storage system: a review

Singh, Digvijay; Buddhi, Dharam; Karthick, Alagar

doi:10.1007/s11356-022-23964-z

Cited by 12 publications

(1 citation statement)

References 76 publications

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“…Compared to conventional solar stills, the heat transfer techniques in PCM-based solar stills can substantially enhance overall distillate productivity: Tubular solar still by 218%, followed by single basin single slope solar still at 149%, pyramidal at 125%, respectively. Moreover, nighttime productivity increased by 235% 21 . An experimental setup was used, employing composite phase change material (CPCM), to carry out numerical modeling of a solar still.…”

Section: Introductionmentioning

confidence: 99%

Improved solar still productivity using PCM and nano- PCM composites integerated energy storage

Murali,

Ramani,

Murugan

et al. 2024

Sci Rep

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The study investigates the impact of Phase Change Material (PCM) and nano Phase Change Materials (NPCM) on solar still performance. PCM and a blend of NPCM are placed within 12 copper tubes submerged in 1 mm of water to enhance productivity. Thermal performance is assessed across four major scenarios with a fixed water level of 1 mm in the basin. These scenarios include the conventional still, equipped with 12 empty copper rods and 142 g of PCM in each tube, as well as stills with NPCM Samples 1 and 2. Sample 1 contains 0.75% nanoparticle concentration plus 142 g of PCM in the first 6 tubes, while Sample 2 features 2% nanoparticle concentration plus 142 g of PCM in the subsequent 6 tubes. Aluminum oxide (Al2O3) nanoparticles ranging in size from 20 to 30 nm are utilized, with paraffin wax (PW) serving as the latent heat storage (LHS) medium due to its 62 °C melting temperature. The experiments are conducted under the local weather conditions of Vaddeswaram, Vijayawada, India (Latitude-80.6480 °E, Longitude-16.5062 °N). A differential scanning calorimeter (DSC) is utilized to examine the thermal properties, including the melting point and latent heat fusion, of the NPCM compositions. Results demonstrate that the addition of nanoparticles enhances both the specific heat capacity and latent heat of fusion (LHF) in PCM through several mechanisms, including facilitating nucleation, improving energy absorption during phase change, and modifying crystallization behavior within the phase change material. Productivity and efficiency measurements reveal significant improvements: case 1 achieves 2.66 units of daily production and 46.23% efficiency, while cases 2, 3, and 4 yield 3.17, 3.58, and 4.27 units of daily production, respectively. Notably, the utilization of NPCM results in a 60.37% increase overall productivity and a 68.29% improvement in overall efficiency.

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Section: Introductionmentioning

confidence: 99%

Improved solar still productivity using PCM and nano- PCM composites integerated energy storage

Murali,

Ramani,

Murugan

et al. 2024

Sci Rep

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Assessing the Feasibility of a Novel Solar Still With Fins, Phase Change Materials, and Wick Materials for Sustainable Water Production

Mahala,

Sharma

2024

Heat Trans

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This work aims to enhance the performance of square pyramid solar stills, both conventional (CPSS) and modified (MPSS), by using wick materials, namely, black cotton cloth and jute cloth. The MPSS features fins and paraffin wax as the phase change material within the basin. The performance of solar stills (SSs) is evaluated through productivity, energy, exergy, economic, and environmental analyses, with sustainability assessed based on the energy production factor and energy payback period. The results confirm an improvement of about 43.08%, 30.77%, 29.23%, 17.89%, and 6.15% in daily yield for MPSS+C, MPSS+J, MPSS, CPSS+C, and CPSS+J, respectively, in comparison to CPSS. MPSS+C shows the maximum energy and exergy improvement of 45.82% and 177.2%, respectively. Energy production factors range from 1.87 to 4.79, with energy payback periods between 0.21 and 0.53 years across six cases. Interestingly, the MPSS+C shows a reduction in cost per liter in productivity and payback period of 10.1% each, in comparison to CPSS. The MPSS+C shows an increase in carbon credits of about 43%, while reducing the CO2 emission of 3.27 tons. The results also proved that the productivity of SS using cotton is 12.31% higher than that of jute.

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Productivity Enhancement of Solar Still Using Shallow Solar Pond

Singh,

Mittal,

Sharma

2024

Lecture Notes in Mechanical Engineering

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Productivity enhancement of solar still through heat transfer enhancement techniques in latent heat storage system: a review

Cited by 12 publications

References 76 publications

Improved solar still productivity using PCM and nano- PCM composites integerated energy storage

Improved solar still productivity using PCM and nano- PCM composites integerated energy storage

Assessing the Feasibility of a Novel Solar Still With Fins, Phase Change Materials, and Wick Materials for Sustainable Water Production

Productivity Enhancement of Solar Still Using Shallow Solar Pond

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