Thermal analysis of active solar distillation system

Tiwari, G.N.; Saxena, Pankaj; Thakur, K.P.

doi:10.1016/0196-8904(94)90081-7

Cited by 6 publications

(3 citation statements)

References 8 publications

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“…El Sebaii et al 45 also calculated the heat transfer coefficients associated with the solar still coupled with PCM, where the maximum value for the evaporative heat transfer coefficient was approximately equal to 36 W/m 2 ‐K and followed the similar trend as observed in the present study. Shukla and Sorayan 46 and Tiwari et al 47 also calculated the heat transfer coefficients associated with solar still where evaporative heat transfer was the dominating factor as compared to convective and radiative heat transfer. Even though the nanoparticle had nominal or no effect on evaporative, conductive, and radiative heat transfer coefficients, the increased basin water temperature of SSNPCM as observed in Figure 7 compared to other two conditions confirm that total heat transfer increased which resulted into higher energy storage in the form of sensible and latent heat from in paraffin wax.…”

Section: Resultsmentioning

confidence: 99%

Performance assessment of a passive solar still integrated with thermal energy storage and nanoparticle stored in copper cylinders

et al. 2020

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Summary In the present study, nanoparticle (CuO) has been dispersed in paraffin wax and stored in a copper cylinder to enhance the thermal conductivity and increase the total daily production of the solar distillation unit. Experiments have been performed for comparison between simple solar still (SSS), solar still with phase change material (SSPCM), and solar still with phase change material doped with nanoparticle (SSNPCM). The mixing of nanoparticle causes a paradigm shift of the thermophysical properties of phase change material (PCM). Nanoparticle and copper cylinder enhance the heat transfer rate with decreased duration of sensible heating, melting and solidification of PCM. Thermal analysis reveals that the evaporative mode of heat transfer has dominated heat transfer between glass cover and water. The maximum and average temperature for water basin and NPCM has been increased significantly for SSNPCM. The daily productivity of SSPCM and SSNPCM has been increased by 40.5% and 94.19% as compared to SSS. Based on the heat transfer rate, thermal conductivity, and daily productivity, SSNPCM can be considered not only as a better performing system as compared to SSS and SSPCM but also as a low cost disruptive technology in resource‐constrained settings where drinking water is really scarce.

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Section: Resultsmentioning

confidence: 99%

Performance assessment of a passive solar still integrated with thermal energy storage and nanoparticle stored in copper cylinders

et al. 2020

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“…Effective use of active solar distillation integrated with solar collectors with heat exchangers had been analyzed [1,2] for enhancing the system performance without and with top cover cooling. Average daily production is found to be 24% privileged than the basin solar still.…”

Section: Introductionmentioning

confidence: 99%

Impetus Yield of Acrylic Top Cover Pyramid Solar still due to Furthered Thermal Conductivity of MnO<sub>2</sub> and PANI-MnO<sub>2</sub> Nanocomposite Materials

Selvakumar¹,

Palanisamy

Vijayalakshmi

et al. 2023

MSF

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Attempts to study the effect of blend MnO2 and PANI-MnO2 nanocomposites in enhancing the productivity of an acrylic Pyramid Solar Still (PSS) is carried out. Synthesized nanocomposites assorted with black paint to improve the absorption efficiency. Size of the synthesized MnO2 is found to be 35nm. SEM image infers particles are aggregates with random shape. Thermal analysis if distillate yield confirms the formation of nanocomposite with improved thermal stability of the PANI. Distillate yield is observed around 0.484 litre/0.25m2, 0.568 litre/0.25m2 and 0.615 litre/0.25m2 still without and with MnO2 and PANI-MnO2 nanocomposites. Average efficiency is found to be 23.05%, 26.63% and 28.52% under three modes. Efficiency of the combined performance is amended due to the absorption properties of MnO2 and PANI-MnO2. Performance ratio under three modes are found to be 5.52 %, 6.44 % and 6.93 %. Results concluded that saturation vapour pressure and latent heat also plays a major hole in production of distillate yield.

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“…Numerous efforts have been made to enhance system performance so that the distillate output is obtained at a reasonable cost. These efforts include active solar distillation, in which the basin of the solar still is integrated with a panel of collectors through heat exchangers [3], enhancing the solar still performance by cooling the glass cover with water film [4], and using a thermal-electrical solar still in which the water vapor is removed from the basin by a low-power fan and then passed through an external condenser [5].…”

Section: Introductionmentioning

confidence: 99%

Enhancing Solar Still Performance Using Vacuum Pump and Geothermal Energy

et al. 2019

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Improvement in the performance of a solar still is investigated with the integration of a geothermal cooling system and a vacuum pump. Geothermal cooling is simulated to provide a cold, effective underground water temperature, which could reach 15–25 °C below ambient. Cooling is achieved by circulating water underground. As a result of this circulation, the cold fluid from the ground flows into a counter flow shell and tube heat exchanger. A vacuum pump is used to keep the solar still at a certain vacuum pressure. The sizes of the geothermal system and solar still are designed in such a way that the water outlet temperature from the ground and its flow rate are capable of condensing the entire vapor produced by the still. An analytical model was developed and then solved using the Newton–Raphson method for solving non-linear equations. A prototype was built to validate the analytical model. The results were in close agreement. A 305% increase in daily water productivity resulted from the proposed enhancements. After experimental validation, the effects of various parameters such as vacuum pressure, ambient temperature, and wind speed on the yield of geothermal solar still were examined. It was found that the increase in vacuum pressure enhanced performance, whereas the increase in wind speed had a detrimental effect on the yield of the solar still. A higher ambient temperature increased the yield of the solar still. Finally, the design of the heat exchanger for condensing the distilled water using geothermal cooling water was also investigated in terms of the increase in UA (the product of overall heat transfer coefficient and the area of heat exchanger) with inlet cooling geothermal water temperature.

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Thermal analysis of active solar distillation system

Cited by 6 publications

References 8 publications

Performance assessment of a passive solar still integrated with thermal energy storage and nanoparticle stored in copper cylinders

Performance assessment of a passive solar still integrated with thermal energy storage and nanoparticle stored in copper cylinders

Impetus Yield of Acrylic Top Cover Pyramid Solar still due to Furthered Thermal Conductivity of MnO<sub>2</sub> and PANI-MnO<sub>2</sub> Nanocomposite Materials

Enhancing Solar Still Performance Using Vacuum Pump and Geothermal Energy

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