scholarly journals Thermal efficiency improvement of a solar desalination process by parabolic trough collector

2021 ◽  
Author(s):  
Bellatreche Randha ◽  
Ouali Maamar ◽  
Balistrou Mourad ◽  
Tassalit Djilali
Keyword(s):  
Solar Collector ◽  
Seawater Temperature ◽  
Future Generation ◽  
Condensation Process ◽  
Water Production ◽  
Solar Still ◽  
Water Shortages ◽  
Solar Distillation ◽  
Sand Temperature ◽  
The Difference

Abstract The nexus water/energy security is one of the main global challenges for the future generation. Solar distillation (thermal process) represents a sustainable solution to water shortages and energy crisis in the world especially in Middle East and North Africa region. The technique is based on evaporation-condensation process via heat delivery through a Cylindrical Parabolic Collector to a Thermal Energy Storage, in the form of sand integrated into the solar still, to maximize water production efficiencies. It is a technically feasible and operational method. Results suggest that the additional solar collector flux has a direct impact on the increase in average sand and seawater temperature particularly over the period between 12:00pm and 04:00pm. Seawater temperature increases by >26.6%. The energy stored quantity delivered for the distiller basin grows proportionality with the sand temperature, which is depending directly for the solar collector absorber temperature. The difference between the both temperatures defines a decreasing rate of −19%. The daily water production by the hybrid solar distiller is 6.5 l/day, it represents an increase of +91% compared to the traditional concrete solar still production (3.4 l/day), for the same geometry and meteorological conditions.

scholarly journals A Review of New Solar Still Design Comprising a Five-Sided Glass Cover and Equipped with an External Tank for PCM

2021 ◽  
Vol 877 (1) ◽  
pp. 012038
Author(s):  
Abbas Sahi Shareef ◽  
Hayder Jabbar Kurji ◽  
Hassan Abdulameer Matrood
Keyword(s):  
Melting Point ◽  
Phase Change ◽  
Solar Collector ◽  
Phase Change Materials ◽  
Review Paper ◽  
Pure Water ◽  
Solar Still ◽  
Glass Cover ◽  
Solar Distillation ◽  
Change Material

Abstract Various human activities have led to the consumption of large quantities of pure water, which has led researchers to find efficient and economical methods for desalinating seawater and water containing impurities. In this review paper, solar energy where it is permanent, abundant and environmentally friendly, to produce pure water was discussed using a new solar distillation device, representing the paper’s novelty. The distillation was designed and used in the way led to increase efficiency and improve productivity by adding a solar collector to the system and equipped with a tank containing phase change material (PCM). It has a low melting point and can change the phase by absorbing the system’s latent heat to maintain the system’s temperature. Which contributes to increasing the distillation period even after sunset, thus increasing the daily productivity of freshwater. Using phase change materials will increase distillation hours from (3-4) hours after sunset, increasing the amount of production between (75 - 90) %.

scholarly journals AUGMENTATION OF SOLAR WATER DISTILLER PERFORMANCE WITH PV/T

2020 ◽  
Vol 5 (1) ◽  
pp. 46-52
Author(s):  
Nguyen Viet Linh Le ◽  
Tri Hieu Le ◽  
Thi Minh Hao Dong ◽  
Van Vang Le ◽  
Dinh Tung
Keyword(s):  
Solar Collector ◽  
Solar Photovoltaic ◽  
Solar Still ◽  
Photovoltaic Panel ◽  
Water Distillation ◽  
Solar Water ◽  
Photovoltaic Modules ◽  
Solar Distillation ◽  
Distillate Yield ◽  
Flat Plate Collector

Recently, due to global warming and urbanization, there are many major cities that may face the challenge of day zero next decades. Obviously, water is an indispensable component for maintaining life on the earth. Although portable water is required of the hour, the quantity of available freshwater is impacted significantly by sea-level rise and pollution from industrialization. As a consequence of the global water crisis, different methods for clean water production from brackish water have been studied and developed in practice, however, the solar distillation of water is the most economical and desirable approach due to this method utilize solar energy that is the environmentally friendly and economical resource. Over the last 15 years, the impressive price drop of the photovoltaic solar collector (PV/T) makes them popular and easy to access. As a result, the employment of PV/T in solar stills is emerging as a potential device for water distillation. Therefore, in this paper, an active solar distiller combined with a photovoltaic panel has been reviewed for improvement of the distillate yield and effectiveness of solar photovoltaic. This review work presents a variety of studies on various types of solar still (for example conventional solar still (CSS), double slope solar still (DSSS), stepped solar distiller, and cascade solar still) couples with different solar water collectors (such as flat plate collector (FPC) and evacuated tubes collector (ETC)) and solar photovoltaic modules. It is obtained that the hybrid PV/T active solar still improves the distillate yield, energy efficiency, and exergy efficiency as compared to passive mode. The cooling method enhances the performance of the photovoltaic solar collector as well as the productivity of solar still. Moreover, the environmental economic estimation reveals that the solar still coupled with the PV/T mitigated considerably the amount of CO2. It can be stated that it is suitable to commercialize the hybrid PV/T active solar still for supplying not only electricity but drinking water also. Finally, this review paper also suggests the scope for the research in the future.

Experimental Investigation on the Performance of Four Types of Solar Stills in Malaysia

2014 ◽  
Vol 567 ◽  
pp. 56-61 ◽  
Author(s):  
Ali Riahi ◽  
Khamaruzaman Wan Yusof ◽  
Mohamed Hasnain Isa ◽  
Balbir Singh Mahinder Singh ◽  
Amirhossein Malakahmad ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Comparative Research ◽  
Potable Water ◽  
Sand Layer ◽  
Water Production ◽  
Solar Still ◽  
Black Paint ◽  
Tropical Condition ◽  
Solar Distillation ◽  
Sea Sand

This study aims at improving a solar distillation still by comparing the performance of four types of double slope single basin solar stills to produce adequate amount of potable water in the areas with confined fresh water. These solar stills fabricated with similar shapes. In each solar still a stainless steel basin with the length of 50 cm, width of 30 cm and depth of 8 cm was utilized. The still configurations differed based on inclusion of 2 cm depth of sea sand layer in the basin, a layer of black paint in the basin and use of a 50 W PV-DC heater. The study was conducted to increase the potable water production under Malaysia tropical condition. A comparative research of cumulative water production among these solar stills showed that solar still with black painted basin was the more efficient; producing 234 %, 190% and 148% the potable water produced by a conventional solar still, solar still with sand layer in basin and solar still connected to a PV-DC heater, respectively.

scholarly journals Energy, Exergy Analysis, and Optimizations of Collector Cover Thickness of a Solar Still in El Oued Climate, Algeria

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Abderrahmane Khechekhouche ◽  
A. Muthu Manokar ◽  
Ravishankar Sathyamurthy ◽  
Fadl A. Essa ◽  
Milad Sadeghzadeh ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Exergy Analysis ◽  
Glass Temperature ◽  
Distilled Water ◽  
Water Production ◽  
Solar Still ◽  
Glass Cover ◽  
Water Production Rate ◽  
The Difference ◽  
Cover Thickness

Researches in many laboratories on solar still desalination are concerned with increasing efficiency using only solar energy. One of the techniques is the difference in the thickness of the glass cover of the distiller. In order to see the influence of this parameter on efficiency, three similar stills with three different glass coverings were investigated. The flow of heat goes through the cover, and higher glass temperature leads to solar still productivity becoming lower. This paper presents an optimization of glass thickness ( G t ) of a conventional solar still (CSS) in El Oued climate, Algeria. Based on the experimental results, the distilled water production rate, energy, and energy efficiency of the CSS have been discussed. The results showed that the suitable G t of the CSS was 3 mm. The distilled water of around 3.15, 2.02, and 1.13 kg was produced by the CSS at energy efficiency of 30.71, 19.02, and 11.44% with the G t of 3, 5, and 6 mm, respectively. The daily average exergy efficiency of 2.46, 1.38, and 0.84% was calculated for the CSS at G t of 3, 5, and 6 mm, respectively.

SIMULATION OF DISTILLED WATER PRODUCTION USING A TRIANGULAR SOLAR STILL － IN CASE OF A PAIKGACHA, A COASTAL AREA OF BANGLADESH －

2019 ◽  
Vol 75 (5) ◽  
pp. I_155-I_163
Author(s):  
Shunya KATO ◽  
Hiroaki TERASAKI ◽  
Tomohiro UMEMURA ◽  
Rei TAKAHASHI ◽  
Teruyuki FUKUHARA ◽  
...  
Keyword(s):  
Coastal Area ◽  
Distilled Water ◽  
Water Production ◽  
Solar Still

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.

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