Summer and winter comparison of productivity improvement in a single slope solar still by using external mirrors

2019 ◽  
Vol 168 ◽  
pp. 9-15
Author(s):  
Ahmed Z. Al-Garni ◽  
Ahmet Z. Sahin ◽  
Salman Alfifi
Keyword(s):  
Solar Still ◽  
Productivity Improvement

A Review on Methods of Productivity Improvement in Solar Desalination

2018 ◽  
Vol 877 ◽  
pp. 414-429 ◽  
Author(s):  
R. Dhivagar ◽  
S. Sundararaj
Keyword(s):  
Drinking Water ◽  
Rural Areas ◽  
Saline Water ◽  
Pure Water ◽  
Energy Storage Materials ◽  
Operating Parameters ◽  
Solar Still ◽  
Productivity Improvement ◽  
Evaporation And Condensation ◽  
Solar Desalination

Population density and automation is the main reason for the demand of drinking water. Water purification without affecting an ecosystem is the important need for daily life. Desalination is the best and effective way to satisfy the demand of fresh water. It is the most effective application of the solar energy. There are many conventional and non-conventional techniques available to make drinking water from the saline water. Among these solar desalination proves to be both economical and eco-friendly system particularly for rural areas. Solar stills are simple device which is used to provide pure water from the saline water by the principle of evaporation and condensation. This article reviews on the several research done on the solar stills to enhance productivity. Different designs of solar still and energy storage materials have been used to increase the yield and also this study proved the fact that efficiency of the solar still is majorly influenced by design and operating parameters.

scholarly journals Solar Still Efficiency Enhancement by Using Graphene Oxide/Paraffin Nano-PCM

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 2002 ◽  
Author(s):  
Mohammad Reza Safaei ◽  
Hamid Reza Goshayeshi ◽  
Issa Chaer
Keyword(s):  
Nusselt Number ◽  
Graphene Oxide ◽  
Phase Change Materials ◽  
Convection Heat Transfer ◽  
Water Desalination ◽  
Design Parameters ◽  
Melting Time ◽  
Solar Still ◽  
Fourier Number ◽  
Productivity Improvement

Solar-driven water desalination technologies are rapidly developing with various links to other renewable sources. However, the efficiency of such systems severely depends on the design parameters. The present study focused on using graphene oxide (GO) with the Φ = 0.2, 0.4 and 0.6 wt.% dispersed in paraffin, as phase-change materials (PCMs), to improve the productivity of a solar still for desalination applications. The outcomes showed that by adding more graphene oxide to paraffin, the melting temperature got reduced. Solar still with GO/paraffin showed 25% productivity improvement in comparison with the solar still with only PCM. The obtained Nusselt number during the melting time also represented that free convection heat transfer into the melted region of the solar still has been enhanced by adding dispersed GO to the PCM, compared to the base paraffin. Also, increasing the hot wall temperature augments the Nusselt number. Finally, an empirical equation was derived to correlate the average Nusselt number as a function of Rayleigh number (Ra), the Stefan number (Ste), the subcooling factor (Sb), and the Fourier number (Fo). The obtained correlation depicted that Nusselt number enhancement has a reverse relation with Fourier number.

Productivity improvement of single basin inclined solar still using enamel coating and copper chips

2019 ◽  
Vol 156 ◽  
pp. 161-167 ◽  
Author(s):  
Sandeep S. Joshi ◽  
M. Mubashshir Naved A. Shahed ◽  
Ramsundar Aware ◽  
Nikhil A. Bhave ◽  
Shubham S. Tagde
Keyword(s):  
Enamel Coating ◽  
Solar Still ◽  
Productivity Improvement

scholarly journals Experimental and Theoretical Investigations of a Modified Single-Slope Solar Still with an External Solar Water Heater

2021 ◽  
Vol 13 (22) ◽  
pp. 12414
Author(s):  
Naseer T. Alwan ◽  
Sergey E. Shcheklein ◽  
Obed Majeed Ali ◽  
Milia H. Majeed ◽  
Ephraim Bonah Agyekum
Keyword(s):  
Thermal Performance ◽  
Water Desalination ◽  
Solar Water Heater ◽  
Solar Still ◽  
Water Heater ◽  
Productivity Improvement ◽  
Improvement Rate ◽  
Solar Water ◽  
June July ◽  
The Cost

One of the key impediments to the wide utilization of solar water desalination systems is limited production. Hence, this study aims at increasing the thermal performance of a single-slope solar still by increasing the surface area of evaporation and absorption exposed to sunlight. A hollow rotating cylinder was installed inside the still structure; this modified system was then joined with an outside solar water heater for productivity improvement. The obtained results show that a 0.5 rpm rotational speed ensured that the cylinder’s surface was kept wet. A mathematical model has been formulated using the finite difference method and the Fortran 90 programming language to assess the thermal performance productivity of two solar stills (conventional solar still (CSS) and modified solar still (MSS)) modelled under different conditions. The experimental and theoretical results are well agreed, with an error of 6.14%. The obtained results show that the maximum productivity recorded in July 2019 was about 11.1 L/m2 from the MSS and 2.8 L/m2 from the CSS, with an improvement rate ranging between 286% and 300% during June, July, August, and September 2019. The production cost per liter of distilled water from the modified and conventional solar stills was 0.0302 USD/L and 0.0312 USD/L, respectively, which indicates a noticeable reduction in the cost of distillate water production.

Psychological approaches to productivity improvement.

1983 ◽  
Vol 38 (4) ◽  
pp. 468-472 ◽  
Author(s):  
Raymond A. Katzell ◽  
Richard A. Guzzo
Keyword(s):  
Productivity Improvement

Evaluasi Pengembangan Sumber Daya Manusia: Sebuah Review

2017 ◽  
Vol 23 (1) ◽  
pp. 52-63
Author(s):  
Titik Nurbiyati
Keyword(s):  
Resource Management ◽  
Human Resources ◽  
Human Resource Management ◽  
Human Resource ◽  
Development Program ◽  
Productivity Improvement ◽  
Participant Satisfaction ◽  
Effective Manner ◽  
Human Labor ◽  
Use Of Knowledge

Human resource management (HRM) is a recognition of the importance of human labor as vital resources that contribute to the goals of the organization, and utilization of multiple functions and activities to ensure that they are used effectively and fairly for the benefit of individuals, organizations, and society. Now human resource management has a unique and timely opportunity to improve productivity. Eventhough, productivity improvement does not means only increase the output. In addition, the evaluation of program responsibles and meets the special needs of employees with efficient cost. It is a very effective manner that very important, as organizations are tempted to cut costs and improve quality in their company. Without evaluation, it is very difficult to demonstrate that the development is the reason for the improvement. Human Resources Development can maintain and support productivity, as well as company isolate of lack of expertise of the human resources for the current job and future. The results are used in evaluating development programs include participant satisfaction with the training and development program development, learning knowledge or skills, the use of knowledge and skills on the job, and the results such as sale, productivity, or the prevention of accidents. Evaluation can also compare costs against benefits that receive development (return on investment).

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