scholarly journals Experimental Study of Solar Still Under Influence of Various Conditions

2019 ◽  
Vol 25 (2) ◽  
pp. 57-71
Author(s):  
Mowaffaq Ali Hammadi ◽  
Najim Abid Jasim
Keyword(s):  
Experimental Study ◽  
Water Level ◽  
Thermal Insulation ◽  
Experimental Tests ◽  
Experimental Results ◽  
Solar Still ◽  
Solar Desalination ◽  
Level Increase ◽  
Passive Solar

In the present work, experimental tests was done to explain the effect of insulation and water level on the yield output. Linear basin, single slope solar still used to do this purpose. The test was done from May to August 2017 in Mosul City-Iraq (Latitude: Longitude: Elevation: 200 m, and  South-East face). Experimental results showed that the yield output of the still increased by 20.785% and 19.864% in case of using thermal insulation at 4cm and 5cm respectively, also the yield output decrease by 15.134% as the water level increase from 4 to 5cm, with the presence of insulation and 14.147% without it. It has been conclude that the insulation and water level play important role in the process of passive solar desalination, also the desalination process has significant value at night and cannot be ignored.  

Experimental Study on a Passive Solar Desalination Unit Associated With Fresnel Lens and Thermal Storage

2021 ◽  
Author(s):  
Jun-Yan Tan ◽  
Jun Wei Ding ◽  
Zhi Yong Ho ◽  
Rubina Bahar
Keyword(s):  
Experimental Study ◽  
Saline Water ◽  
Low Cost ◽  
Fresnel Lens ◽  
Solar Irradiation ◽  
Petroleum Jelly ◽  
Solar Desalination ◽  
Passive Solar ◽  
Tropical Weather ◽  
The Individual

Abstract Passive solar stills can be a viable source of freshwater in water and energy scarce regions. However, the low production rate is one of the major drawbacks of passive solar stills. This work presents an experimental study of the combined effects of concentrated solar power (CSP) and phase change material (PCM) on a low-cost double slope passive solar desalination unit. Fresnel lens as the refractive CSP was used to converge the available solar irradiation onto the solar still basin that contained saline water. Metal tubes containing petroleum jelly with a melting point of 37°C were immersed as the PCM in the saline water. Four different experimental setups were tested in the natural tropical weather of Malaysia to identify the individual and combined impact of the lens and petroleum jelly on desalination performance. It was observed that the performance was better with the individual application of the CSP rather than the combination of CSP and PCM. There was a 28.21 % improvement in distillate production using Fresnel lens only; while using the Fresnel lens and PCM in combination showed a 25.64 % improvement in production. This study also provides several recommendations with which the experimental setup can be improved to yield better results in the future.

Impact to Composite Box Containing Water and Baffles

2016 ◽  
Vol 139 (3) ◽  
Author(s):  
Y. W. Kwon ◽  
T. J. South ◽  
K. J. Yun
Keyword(s):  
Experimental Study ◽  
Water Level ◽  
Computational Study ◽  
Structural Response ◽  
Experimental Tests ◽  
Low Velocity Impact ◽  
Front Side ◽  
Low Velocity ◽  
Structural Responses ◽  
The Impact

A series of experimental tests were conducted for low-velocity impact on a composite box containing water in order to study the fluid–structure interaction (FSI). Then, baffles were inserted in the box to examine their effect on the structural response of the composite box. Finally, a computational study was conducted to supplement the experimental study. The water level inside the composite box was varied incrementally from 0% (i.e., no water) to 100% (full water). The impact velocity was also changed. In the experimental study, strain gauges and the load cell were used to measure the strain responses at the front, side, and back surfaces as well as the impact force. The results showed that the FSI effect was significant to the structural responses depending on the water level. The effect of the baffle was different among the front, side, and back surfaces. Both experimental and numerical results agreed well.

scholarly journals Mathematical modeling for output yield obtained by single slope solar still integrated with sand troughs

2021 ◽  
pp. 217-217
Author(s):  
Nagaraju Vellanki ◽  
Murali Govindarajan ◽  
Nagarjunavarma Ganna ◽  
Sivakandhan Chinnasamy
Keyword(s):  
Water Level ◽  
Sea Water ◽  
Maximum Yield ◽  
Daily Basis ◽  
Water Levels ◽  
Experimental Results ◽  
Experimental Investigations ◽  
Capillary Effect ◽  
Solar Still ◽  
Effect Model

The crises for potable water is inevitable, due to increasing population. Solar desalination is apt technology to convert brack water and sea water into potable one. In the current work a mathematical modelling of a single slope solar still integrated with sand troughs is presented. The model is validated with the experimental results of a solar still with 3cm of water level at the basin. The mathematical model findings and results obtained with the experimental investigations are within ?10% deviation. Capillary effect was proposed to obtain the yield daily basis and thermal effect model was integrated with the capillary effect model. From the results, it is understood that the yield obtained is more in the case of solar stills with sand troughs when compared to solar stills without sand troughs. Further the model is used for predicting yield for 1cm and 2cm of water levels at the basin. It is observed that the maximum yield was obtained for 1cm water level at the basin. There is a good agreement between theoritacal results and experimental results. It shows that the still produce better yield with the lower depth of water level at the basin, this may be because of the availability of more space in the sand for evaporation due to capillary effect in the troughs.

scholarly journals Saving Energy Using Local Available Insulation Materials in Erbil

2018 ◽  
Vol 7 (4) ◽  
pp. 67
Author(s):  
Ali M. Ibrahim ◽  
Ramzi R. Ibraheem ◽  
Rizgar B. Weli
Keyword(s):  
Experimental Study ◽  
Energy Saving ◽  
Thermal Insulation ◽  
Experimental Tests ◽  
Theoretical Method ◽  
Maximum Energy ◽  
Experimental Result ◽  
Saving Energy ◽  
Heating And Cooling ◽  
Rock Wool

An experimental study has been carried out to investigate how much energy may be saved through the use of thermal insulation in the walls and roofs of buildings, experimental tests were done to show percentage of saving energy in walls and roofs. The experimental result shows that the maximum energy saving for the walls when using Rockwool as insulation is75.1% but when using of extruding polystyrene (XPS), it is 73.9%. Similarly, for the roof the results are 66.6% and 61.1% respectively. A theoretical method based on annual energy saving using Degree-Day Method, has been employed for Erbil city. The percentage of energy saving using Rockwool, in case of walls is 77.9% for heating, and it is 78% for cooling. In the similar manner the percentage of energy saving for Erbil city is 77.3% for heating, and cooling when using xps, in case of walls but for the roofs the percentage of energy saving is 80.5%  for heating  and cooling when using rock wool and 80.1% when using XPS.

scholarly journals Effect of water depth, Inlet water temperature, and fins on the productivity of a pyramid solar still – An experimental study

2020 ◽  
Author(s):  
Malik Yousef Al-Abed Allah ◽  
Mohammad Omar Abu Abbas
Keyword(s):  
Experimental Study ◽  
Water Temperature ◽  
Surface Area ◽  
Water Depth ◽  
Research Work ◽  
Experimental Results ◽  
Bottom Of The Pyramid ◽  
Solar Still ◽  
Effect Of Water

Abstract. Many approaches are using to improve the productivity of the pyramid solar still. Pyramid solar still provides a larger surface area than conventional types of solar still. In this research work, three sections have been evaluated. The first section has been studied by changing the water depth from 1 to 5 cm. In the second part of the experiment, increasing the inlet water temperature has been investigated, and finally, adding fins at the bottom of the still at certain inlet water depth has been achieved. The experimental results show that the still productivity could be influenced by the basin depth by up to 40.6 % when varying water depth from 1 to 5 cm, The freshwater production from the pyramid solar still was 1230.5, 1045, 998, 901, and 731 mL for the water depth from 1 to 5 cm, respectively. Moreover, it was found that productivity increased by 7.5 % when fins were used at the bottom of the pyramid solar still. In addition, the results showed that the still productivity could be influenced by varying inlet water temperature to 15.3 % and 21.2 % when varying the inlet water temperature from 30 °C to 40 °C and 50 °C, respectively.

scholarly journals Comparative Study of Three Solar Desalination Units Based on Theoretical and Experimental Approach

2019 ◽  
Vol 01 (01) ◽  
pp. 112-118 ◽  
Author(s):  
Houcine Moungar ◽  
Ahmed Azzi ◽  
Youcef Sahli ◽  
Abdelkarim Haida
Keyword(s):  
Experimental Study ◽  
Comparative Study ◽  
Experimental Approach ◽  
Produced Water ◽  
Water Productivity ◽  
Water Layer ◽  
Water Quantity ◽  
Solar Still ◽  
Solar Desalination ◽  
Water Amount

This work presents a theoretical and experimental study of a double slope still with and without immersed fins compared to the single solar still monthly production. The influences of the distance between fins, fin heights, fin numbers and water layer thickness on the solar still production have been widely researched. From the obtained results, the distance between fins has no significant effect on the still productivity. Moreover, for fin heights from 2 to 5 cm, cause the productivity raising, when the fin heights are from 6 to 8 cm found an increasing in the still production. A larger fin numbers lead to a rising in the produced water amount. The water quantity augmentation in the basin makes the water productivity decreasing. The experimentally obtained results during the day June 11, 2016, show that the solar still with immersed fins productivity was about 15 to 27 % higher than that of the simple solar still, under the following conditions, i.e. mw = 42.61 kg, h1 = 3.6 cm, Vw = 3.5 m/s, lw = 5 cm and Nfins = 12.

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