Enhancing the solar still yield by increasing the surface area of water—A review

Samuel, D.G. Harris; Nagarajan, P.K.; Arunkumar, T.; Kannan, E.; Sathyamurthy, Ravishankar

doi:10.1002/ep.12280

Cited by 58 publications

(10 citation statements)

References 33 publications

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“…to desalinate water (Harris, Vol. 5(4), 2015, pp 258 Nagarajan, Arunkumar, Kannan & Sathyamurthy, 2015), and enough knowledge regarding solar still technologies, we believe that our approach is a sustainable procedure.…”

Section: Figure 5 Centrifuge Used In the Microalgae Laboratory At Isepmentioning

confidence: 93%

Learning sustainability by developing a solar dryer for microalgae retrieval

Malheiro

Ribeiro

Silva

et al. 2015

J. Technol. Sci. Educ.

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The development of nations depends on energy consumption, which is generally based on fossil fuels. This dependency produces irreversible and dramatic effects on the environment, e.g. large greenhouse gas emissions, which in turn cause global warming and climate changes, responsible for the rise of the sea level, floods, and other extreme weather events. Transportation is one of the main uses of energy, and its excessive fossil fuel dependency is driving the search for alternative and sustainable sources of energy such as microalgae, from which biodiesel, among other useful compounds, can be obtained. The process includes harvesting and drying, two energy consuming steps, which are, therefore, expensive and unsustainable. The goal of this EPS@ISEP Spring 2013 project was to develop a solar microalgae dryer for the microalgae laboratory of ISEP. A multinational team of five students from distinct fields of study was responsible for designing and building the solar microalgae dryer prototype. The prototype includes a control system to ensure that the microalgae are not destroyed during the drying process. The solar microalgae dryer works as a distiller, extracting the excess water from the microalgae suspension. This paper details the design steps, the building technologies, the ethical and sustainable concerns and compares the prototype with existing solutions. The proposed sustainable microalgae drying process is competitive as far as energy usage is concerned. Finally, the project contributed to increase the deontological ethics, social compromise skills and sustainable development awareness of the students.

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Section: Figure 5 Centrifuge Used In the Microalgae Laboratory At Isepmentioning

confidence: 93%

Learning sustainability by developing a solar dryer for microalgae retrieval

Malheiro

Ribeiro

Silva

et al. 2015

J. Technol. Sci. Educ.

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“…For maximum productivity this must be close to the latitude angle of the site . Several factors were found to enhance the productivity, such as the increase in evaporation rate using wick materials . The use of graphite and copper oxide as nanoparticles ameliorated the productivity by 57.6 and 47.8% respectively, while the glass cover of the still is cooled by film cooling , an increase of 50.3% more than the conventional solar still when flake graphite nanoparticles were used , Ding uses a nano ratchet, multilayer graphene with cone‐shaped nanopores (MGCN), which creates a difference in pressure which accelerates the vapor generation, an increase of at least 15 times .…”

Section: Introductionmentioning

confidence: 99%

Improving the water production of a solar still by adding an internal condensation chamber: A theoretical study

Mahammed

Kerfah

Bezzina

2019

Env Prog and Sustain Energy

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In this article, the validity of a numerical simulation of a basin solar still coupled with a condensation chamber was analyzed, before being cooled through a cooling water system. The system contained a serpentine pipe combined with a rectangular sheet of galvanized steel. The model was validated by comparing calculated and then experimental results mentioned in previous research for a typical day in the month of June 2013, the comparison of results showed a good agreement between the experimental and numerical tests. The model was developed to evaluate the performance of the system with optimum mass flow and compared throughout the typical day of each month of the year with that of a solar still without cooling. The model was investigated numerically according to meteorological data of the Algerian city, Khemis Miliana using the model of Capderou. The equations are modeled by the finite difference method, the Gauss–Seidel iterative method was used to solve the resulting algebraic equation. The highest productivity of the year was 6.7 Kg/m2 during the typical day of august with 60% higher productivity than the still without cooling. It was observed that the productivity of the solar still was sensitive to the flow mass of cooling water. Both the condenser chamber volume and the area from the opening of the evaporator to the condenser chamber have a significant effect on distillate production of the system. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13146, 2019

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“…However, their main disadvantage is low distillate output per unit area . Therefore, the distillation efficiencies associated with solar stills are significantly low . Many researchers have indicated a strong possibility of solar stills technical and economic viability in arid regions and isolated areas where complex technological installations and grid connectivity are not possible .…”

Section: Introductionmentioning

confidence: 99%

Effect of specific height on productivity and thermal efficiency of a solar still: An experimental approach under indoor environment

Jamil¹,

Akhtar²

2019

Env Prog and Sustain Energy

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A novel experimental approach is presented where studies have been conducted on a solar still at four specific heights in the range of 0.266–0.341 m (in steps of 0.025 m) keeping other dimensions constant. Performance of solar still is established under indoor environment to suppress meteorological factors. Uniform heat was supplied to the solar still through flat plate‐type electrical heaters. For each specific height, the performance of the solar still was evaluated at five heat fluxes (600–1000 W/m2 in steps of 100 W). Performance of solar still at different specific heights was compared in terms of operating temperatures, productivity, and efficiency. It was found that reduction in specific height enhances distillate productivity as well as thermal efficiency of the solar still due to reduction in cavity volume and an increase in average operating temperature. An increase of in daily distillate yield of 89.44% (at 600 W/m2), 56.07% (at 700 W/m2), 28.50% (at 800 W/m2), 38.60% (at 900 W/m2), and 37.38% (at 1000 W/m2) between Case 1 to Case 4 was observed. Further, between Case 1 and Case 4, the thermal efficiency increased from 27.29 to 46.18%, 32.73 to 51.06%, 36.82 to 52.17%, 41.25 to 56.79%, and 42.55 to 57.50% at 600, 700, 800, 900, and 1000 W, respectively. Results demonstrate that for a particular specific height the total daily productivity increases linearly with heat flux. Correlation for estimating thermal efficiency of solar still is proposed in terms of the aspect ratio and input power. © 2019 American Institute of Chemical Engineers Environ Prog, 38: e13227, 2019

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Enhancing the solar still yield by increasing the surface area of water—A review

Cited by 58 publications

References 33 publications

Learning sustainability by developing a solar dryer for microalgae retrieval

Learning sustainability by developing a solar dryer for microalgae retrieval

Improving the water production of a solar still by adding an internal condensation chamber: A theoretical study

Effect of specific height on productivity and thermal efficiency of a solar still: An experimental approach under indoor environment

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