Novel Concept on the Enhancement of Conventional Solar Still Performance via Constant Heat Rate Supply to the Saline Water 

2021 ◽  
Author(s):  
Wael M. El-Maghlany ◽  
enass massoud ◽  
mohamed Elhelw
Keyword(s):  
Wind Turbine ◽  
Saline Water ◽  
Storage System ◽  
Heat Rate ◽  
Glass Temperature ◽  
Solar Still ◽  
Constant Heat ◽  
Makeup Water ◽  
Solar Intensity ◽  
Novel Concept

Abstract One of most reduction reasons of simple conventional solar still productivity is the coupling between high solar intensity and the high ambient temperature in the same time. The high intensity increases the saline water temperature while the outside temperature increases the glass temperature and consequently reduction in saline water and glass temperature difference leads to reduction in condensation and productivity. The present theoretical study focuses on the completion of the absorbed solar energy in the basin to be constant during the day. The basin water will be in high temperature level all day especially at the time of low outside temperature far away the noon. The absorbed heat in the basin is held constant at αw Imax by extra heat from wind turbine power with battery storage system all day hours. The results show that, the solar still productivity with constant heat supply is more than that with same amount of variable energy during sun rise time only (6 AM to 6 PM) by 69.133 %. So, constant absorbed heat in the water basin (αw Imax) through the 24 hr of the day enhances the performance with productivity up to 248 % with the hybrid solar and electric power consumption of the wind turbine power. The water in the basin is held constant at 2 cm via makeup water to compensate the evaporation rate.

Numerical simulation of single and double slope solar still for temperature distribution

2020 ◽  
pp. 221-231
Author(s):  
Anil Kumar ◽  
Rohit Kumar
Keyword(s):  
Water Vapor ◽  
Minimum Temperature ◽  
Potable Water ◽  
Saline Water ◽  
Condensation Process ◽  
Glass Temperature ◽  
Human Beings ◽  
Vapor Mixture ◽  
Solar Still ◽  
Simulation Results

Water and the use of conventional energy sources are two significant problems of the world. Water is essential for sustenance. Human beings need of potable water at less consumption of non- renewable energy resources. There are many techniques to convert saline water into potable water. In this paper, three-phase, three dimensional a single slope and double slope single basin still both were prepared and simulated by using ANSYS FLUENT v19.2. Simulation results of solar stills were made by using evaporation as well as condensation process at the climate conditions of Delhi (27.0238° N, 74.2179° E). Within the scope of this study, simulation results of both systems were calculated and compared with each other. It is examined that temperature inside the single slope solar still is maximum from 13:00 to 14:00 hrs while double slope still has low temperature compared to single still. The maximum and minimum temperature of water-vapor mixture inside the single slope still were calculated 435.39K and 22.283K and maximum and minimum temperature on glass were 379 K and 16.22 K whereas in double slope, maximum and minimum temperature of water-vapor mixture inside the still were 92.12K and 25.60K and glass temperature were 76.154K and 19.22K Hence, due to temperature difference between glass surface and outer environment, more condensation will be in single slope. Inner water temperature is responsible for more evaporation and higher temperature more than 50? can be found in single slope still as compared to double slope. Hence, single slope still could be better there.

Experimental and Numerical Investigation of a Semispherical Solar Still, Chamber Stepwise Basin, with and without a PV Powered Electrical Heater

2022 ◽  
pp. 1-17
Author(s):  
Safa M Aldarabseh ◽  
Salah Abdallah
Keyword(s):  
Saline Water ◽  
Pure Water ◽  
Power Source ◽  
Experimental Results ◽  
Solar Still ◽  
Electrical Heater ◽  
Straightforward Method ◽  
Solar Intensity ◽  
Rate Of Evaporation ◽  
Mathcad Software

Abstract The world's need for drinkable water is increasing with a growing population. The desalination process using solar energy is the cheapest and most straightforward method that can be used to generate pure water from saline water by utilizing energy from the sun's free heat source. A semispherical and chamber stepwise basin solar still with an inclined glass cover, with and without PV powered electrical heaters as another power source can increase the rate of evaporation of saline water, thus increasing the productivity of semispherical solar still. In this investigation, a conventional solar still and semispherical solar still with and without PV-powered electrical heaters were invented and worked in parallel with the experimental setup to make a good comparison between these models. The experimental results show that stepped semispherical with PV-powered electrical heater and without PV-powered electrical heater solar stills enhanced the productivity of freshwater from a conventional solar still by 156.6% and 72.5%, respectively. The theoretically simulated model is obtained using Mathcad software, and is compared with experimental results. Semispherical solar still productivity increases with increased solar intensity and with a PV-powered electrical heater as an additional power source. The theoretical results concluded from the mathematical model are in good agreement with experimental results.

scholarly journals Modeling Triple Solar Still Production Using Jordan Weather Data and Artificial Neural Networks

2014 ◽  
Vol 07 (2) ◽  
Keyword(s):  
Neural Networks ◽  
Water Temperature ◽  
Input Data ◽  
Weather Data ◽  
Glass Temperature ◽  
Solar Still ◽  
Cover Glass ◽  
Plate Temperature ◽  
Solar Intensity ◽  
Hourly Variation

The objective of the study were to assess the sensitivity of the Artificial Mural Networks (ANN) predictions to different combinations of input parameters as well as to determine the minimum amount of inputs necessary to accurately model solar still performance. Satisfactory results for the triple solar still suggest that, with sufficient input data, the ANN method could be extended to predict the performance of other solar still designs in different climate regimes. To accomplish this objective, a study has been performed to determine the effectiveness of triple solar still efficiency (η) using ANNs. The study used the following parameters as an input to the ANN: time, hourly variation of cover glass temperature (Tg), water temperature in the upper basin (Tw1), water temperature in the middle basin (Tw2) and water temperature in the lower basin of the triple basin still (Tw3), distillate volume, ambient temperature (Ta), plate temperature (TP) and hourly solar intensity (Is).

Experimental investigation of a pyramid type solar still with porous material: productivity assessment

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Naresh Yarramsetty ◽  
Naveen Sharma ◽  
Modumudi Lakshmi Narayana
Keyword(s):  
Porous Material ◽  
Saline Water ◽  
Base Plate ◽  
Hot Water ◽  
Feed Water ◽  
Solar Still ◽  
Absorber Plate ◽  
Content Type ◽  
Water Distillation ◽  
Clay Pots

Purpose This study aims to investigate the effect of porous material (clay pots) and it is facing on the productivity performance of a pyramid type solar still. The clay pots are placed in the basin facing up and facing down. The numbers of clay pots considered were 9 and 25, and its performance was compared with normal (0 clay pots) solar still. Design/methodology/approach The pyramid solar water distillation system has been designed, fabricated and tested under the actual environmental conditions of Kanchikacherla (16.6834 0N, 80.3904 0E), Andhra Pradesh, India. The solar still is used to produce the fresh water and hot water simultaneously from the brackish (i.e. containing dissolved salts) feed water for domestic applications. From open literature, it was established that the rate of evaporation is higher when the flowing water is held for a longer duration on the black color absorber plate, thereby leading to an increase in productivity of freshwater. Therefore, the pyramid solar still has been tested for smooth absorber plate and the absorber plate with porous heat storage material. Findings The porous material increases the production rate of freshwater compared to a base plate. However, the pyramid still with clay pots has higher productivity at a lower temperature because of the porosity effect. Originality/value The total dissolved solids, electrical conductivity and pH of the distilled water and the saline water have also been measured and compared.

Enhancement the Solar Still Performance Using Chimney Exhaust Gases

2021 ◽  
Author(s):  
Hamdy Hassan
Keyword(s):  
Mathematical Model ◽  
Theoretical Study ◽  
Saline Water ◽  
Kutta Method ◽  
Solar Still ◽  
Climate Conditions ◽  
Exhaust Gases ◽  
Runge Kutta Method ◽  
The Impact ◽  
The Mathematical Model

Abstract In this paper, a theoretical study is presented on enhancement of the solar still performance by using the exhaust gases passing inside a chimney under the still basin. The impact of the exhaust gases temperature on the solar still temperature, productivity, and efficiency are considered. The performance of solar still with chimney is compared with that of conventional solar still. The study is carried out under the hot and climate conditions of Upper Egypt. A complete transient mathematical model of the physical model including the solar still regions temperatures, productivity, and heat transfer between the solar still and the exhaust gases are constructed. The mathematical model is solved numerically by using fourth-order Runge-Kutta method and is programmed by using MATLAB. The mathematical model is validated using an experimental work. The results show that the solar still saline water temperature increases and productivity with using and rising the exhaust gases. Furthermore, the impact of using exhaust gases on the still performance in winter is greater than in summer. using chimney exhaust gases at 75 °C and 125 °C enhances the daily freshwater yield of the conventional still by more than three times and about six times in winter, respectively, and about two and half times and more than three times in summer, respectively.

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