scholarly journals NUMERICALLY INVESTIGATING THE EFFECTS OF FEED WATER PREHEATING TANK DESIGN ON THE PERFORMANCE OF SINGLE SLOPE SOLAR STILL

2021 ◽  
Vol 17 ◽  
Author(s):  
Zahraa A. Faisal ◽  
Hassanain Ghani Hameed ◽  
Dhafer Manea H. Al-Shamkhee
Keyword(s):  
Feed Water ◽  
Solar Still ◽  
Tank Design

scholarly journals Experimental Validation of a Solar Powered Multistage Flash Desalination Unit with Alternate Storage Tanks

Water ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2143
Author(s):  
Mishal Alsehli
Keyword(s):  
Water Resources ◽  
Solar Collector ◽  
Fossil Fuels ◽  
Feed Water ◽  
Daily Production ◽  
Solar Desalination ◽  
High Solar Radiation ◽  
Multi Stage ◽  
Tank Design ◽  
Solar Powered

The fossil fuels that power conventional desalination systems cause substantial environmental impact. Solar desalination can satisfy critical water needs with only a minimal contribution to global warming. The current work presents an attractive new design suitable for regions with limited water resources and high solar radiation rates. This work is an experimental study of a newly designed, solar-powered, multi-stage flash (MSF) desalination plant. The design could address the need to increase the limited water resources in solar energy-rich areas. The prototype consists of a solar collector, an MSF unit, and a novel dual thermal storage tank design. In this prototype, preheated brine is directly heated by circulation through the solar collector. Two tanks serve the MSF unit; one tank feeds the MSF unit while the other receives the preheated feed water. The two tanks alternate roles every 24 h. The study was conducted in Taif, Saudi Arabia, throughout the month of September 2020. The results of the experiment showed that 1.92 square meters of solar collector area is needed for an average daily production of 19.7 kg of fresh water, at a cost of approximately $0.015 per liter.

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.

scholarly journals Performance Evaluation of Single Slope Solar Still by Integrating with Solar Thermal Systems

2019 ◽  
Vol 6 (2) ◽  
pp. 91-102
Author(s):  
R. Sivakumaran ◽  
P. Jdihesh
Keyword(s):  
Drinking Water ◽  
Salt Water ◽  
Photovoltaic System ◽  
Feed Water ◽  
Solar Still ◽  
Daily Production ◽  
Global Challenge ◽  
Solar Pond ◽  
Solar Distillation ◽  
Solar Photovoltaic System

The world is facing the state of being scarce of fresh or drinking water and it is the major problem and global challenge. Along with air and food, water is a basic necessity for human. Solar energy is the biggest source of energy available on earth. A solar distillation is one of the methods for purifying salt water to drinking water. In this method fresh water is obtained by exposing a small layer of salt water to solar radiation and the water vaporized from the basin is condensed on the bottom side of a taper transparent cover. It can be collected in receiving troughs at the end of the still. For this research, a solar still has been designed, fabricated and tested under the climate condition of Coimbatore (11.01680 N, 76.9550 E), India from December 2016 to March 2017. The still basin area was 1m2 and the glass cover of still is inclined at 13 degree based on the city latitude. Solar still is integrated with thermal system such as solar photovoltaic system and then with solar pond in order to preheat the feed water thereby increasing the productivity considerably. Experiments were carried out on the still using different parameters and tested for performance. The results showed that the daily production of the conventional solar still was 2 Lit/m2/day and integrated with photovoltaic system and solar pond was 3.1 Lit/m2/day and 2.54 Lit/m2/day respectively.

scholarly journals Comparative investigation of artificial neural network learning algorithms for modeling solar still production

2015 ◽  
Vol 5 (4) ◽  
pp. 480-493 ◽  
Author(s):  
Ahmed F. Mashaly ◽  
A. A. Alazba
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Learning Algorithms ◽  
Ambient Air ◽  
Feed Water ◽  
Solar Still ◽  
Neural Network Learning ◽  
Network Learning ◽  
Artificial Neural ◽  
Lm Algorithm

Three artificial neural network learning algorithms were utilized to forecast the productivity (MD) of a solar still operating in a hyper-arid environment. The learning algorithms were the Levenberg–Marquardt (LM), the conjugate gradient backpropagation with Fletcher–Reeves restarts, and the resilient backpropagation. The Julian day, ambient air temperature, relative humidity, wind speed, solar radiation, temperature of feed water, temperature of brine water, total dissolved solids (TDS) of feed water, and TDS of brine water were used in the input layer of the developed neural network model. The MD was located in the output layer. The developed model for each algorithm was trained, tested, and validated with experimental data obtained from field experimental work. Findings revealed the developed model could be utilized to predict the MD with excellent accuracy. The LM algorithm (with a minimum root mean squared error and a maximum overall index of model performance) was found to be the best in the training, testing, and validation stages. Relative errors in the predicted MD values of the developed model using the LM algorithm were mostly in the vicinity of ±10%. These results indicated that the LM algorithm is the most ideal and accurate algorithm for the prediction of the MD with the developed model.

scholarly journals Design procedures for a passive pyramid solar still with an automatic feed water system

2021 ◽  
Author(s):  
Mahmoud Elgendi ◽  
Mohamed Y.E. Selim ◽  
Aysha Aldhaheri ◽  
Wafa Alshehhi ◽  
Houreyah Almarshoodi ◽  
...  
Keyword(s):  
Water System ◽  
Feed Water ◽  
Solar Still ◽  
Design Procedures

scholarly journals Performance analysis of basin-type vertical multiple-effect diffusion solar still integrated with solar pond: energy, exergy and economical analysis

2021 ◽  
Author(s):  
Gurprinder Singh Dhindsa ◽  
Madhup Kumar Mittal ◽  
Gurpreet Singh Sokhal ◽  
Kamaljit Singh Sokhal ◽  
Nima Khalilpoor ◽  
...  
Keyword(s):  
Flow Rate ◽  
Exergy Efficiency ◽  
Feed Water ◽  
Feed Flow Rate ◽  
Solar Still ◽  
Batch Mode ◽  
Multiple Effect ◽  
Solar Pond ◽  
Energy And Exergy ◽  
Daily Energy

Abstract An experimental analysis was carried out with basin-type vertical multiple-effect diffusion solar still coupled with solar pond (BVMEDS-SP) to evaluate 24 hours overall performance of still by varying feed flow rate and temperature in addition to other affecting parameters. A solar pond was utilized to harness solar energy diurnal and the same energy was provided to basin water nocturnal in batch mode to produce distillate throughout the day. It can be seen that the daily energy and exergy performance of BVMEDS-SP having four effects was improved by 21.74% and 16.83%, respectively, when the feed flow rate was reduced from 0.32 g/m2/s to 0.13 g/m2/s. As the temperature of feed water was enhanced from 25.65°C to 32.4°C, the daily energy and exergy efficiency of BVMEDS-SP correspondingly increased by 41.76% and 46.62%. In addition, increasing the number of effects from 2 to 5 improved the overall energy and exergy efficiency to 93.15% and 171.80%, respectively. The cost analysis revealed that cost of distillate for 2-effect still was Rs. 4.64/kg and it reduced to Rs. 3.11/kg for 7-effect still. A productivity correlation was furthermore developed and estimated that the experimental database of current research was in good agreement with the error band of −5% to +10%.

scholarly journals Performance Evaluation of Single Slope Solar Still by Integrating with Solar Thermal Systems

2020 ◽  
Vol 7 (1) ◽  
pp. 15-26
Author(s):  
R. Sivakumaran ◽  
P. Jdihesh
Keyword(s):  
Drinking Water ◽  
Salt Water ◽  
Photovoltaic System ◽  
Feed Water ◽  
Solar Still ◽  
Daily Production ◽  
Global Challenge ◽  
Solar Pond ◽  
Solar Distillation ◽  
Solar Photovoltaic System

The world is facing the state of being scarce of fresh or drinking water and it is the major problem and global challenge. Along with air and food, water is a basic necessity for human. Solar energy is the biggest source of energy available on earth. A solar distillation is one of the methods for purifying salt water to drinking water. In this method fresh water is obtained by exposing a small layer of salt water to solar radiation and the water vaporized from the basin is condensed on the bottom side of a taper transparent cover. It can be collected in receiving troughs at the end of the still. For this research, a solar still has been designed, fabricated and tested under the climate condition of Coimbatore (11.01680 N, 76.9550 E), India from December 2016 to March 2017. The still basin area was 1m2 and the glass cover of still is inclined at 13 degree based on the city latitude. Solar still is integrated with thermal system such as solar photovoltaic system and then with solar pond in order to preheat the feed water thereby increasing the productivity considerably. Experiments were carried out on the still using different parameters and tested for performance. The results showed that the daily production of the conventional solar still was 2 Lit/m2/day and integrated with photovoltaic system and solar pond was 3.1 Lit/m2/day and 2.54 Lit/m2/day respectively.

Study on the Comparative Performance Assessment of Distillation method by using a Conventional Method and Elix Technology

2018 ◽  
Vol 4 (1-2) ◽  
Author(s):  
Rubina Chaudhary ◽  
Anjali Barwa1 ◽  
Rohan Verma ◽  
Shukti Singh ◽  
Rana Pratap Singh
Keyword(s):  
Water Quality ◽  
Total Alkalinity ◽  
Quality Analysis ◽  
Water Quality Parameter ◽  
Total Hardness ◽  
Residual Chlorine ◽  
Feed Water ◽  
Processing Unit ◽  
Solar Still ◽  
Essential Components

In this study, experiments were conducted on feed water and distill water generated from simple solar still and from elix technology; water quality analysis was done in laboratory to check the contaminants removal efficiency from raw water samples. Changes in the water quality may causes error in the compromised experimental results, contaminated reagents and also may change the accuracy of the equipment. The quality of water used in the laboratory is critical for the success of the tests performed. Water quality parameter such as pH, EC, TDS, COD, total alkalinity, total hardness, free residual chlorine, sodium, turbidity, chloride, sulphate, floride, Total and Fecal coliform and heavy metal like Pb, Zn, Cu, Fe, Mn, were analysed. Distilled water is one of the essential components for chemical and biological analysis in the field of analytical and medical testing. Many distillation methods are available but they are either energy intensive or use renewable (solar) energy like conventional solar still. In this study, performance analysis was conducted for Non-conventional (reverse osmosis and electro-de-ionization hybrid) and conventional (solar still) distillation units. The values obtained were within the standard range and it was concluded that the results of Elix water testing from processing unit were found more promising for research purpose.

Innovation of Solar Desalination System Coupled with Solar Collector: Experimental Study

2021 ◽  
Vol 80 (1) ◽  
pp. 94-111
Author(s):  
Mokhless Boukhriss ◽  
Kamel Zarzoum ◽  
Med Ali Maatoug ◽  
Mahdi Timoumi
Keyword(s):  
Industrial Development ◽  
Low Cost ◽  
Research Work ◽  
Packed Bed ◽  
Climatic Conditions ◽  
Feed Water ◽  
World Population ◽  
Solar Still ◽  
Solar Distillation ◽  
Water Collector

The supply of drinking water is a growing problem especially for developing countries because of the industrial development, intensified agriculture, improvement of standard of life and increase of the world population. For this reason, purification of water supplies is extremely important. Solar stills are used for solar distillation plants due to its simplicity in construction and operation, low cost and however the yield is low. Because of its low productivity it is not popularly used. A lot of research work is undertaken to improve the productivity of the still. This paper presents the new design of solar distillation system coupled to a condenser, solar air and water collector and packed bed. This new concept of distiller solar still using humidification- dehumidification processes which is exploited for the desalination purpose. The experiment is carried out during the summer climatic conditions of Tunisia. The productivity in a solar still mainly depends on the temperature difference between the evaporation tower water and the condensation tower for a given surface area. The results clearly show that the instantaneous efficiency increases with the increase of solar radiation and with the increase of feed water temperature.

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