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.

scholarly journals Performance Improvements of Hemispherical Solar Still Using Internal Reflector: Energy and Exergy Analysis

2021 ◽  
Author(s):  
Mohammed El Hadi Attia ◽  
Muthu Manokar Athikesavan ◽  
Murugan Kaliyamoorthy ◽  
Guruprasad Balachandran ◽  
Syed Jafar Kutbudeen ◽  
...  
Keyword(s):  
Evaporation Rate ◽  
Exergy Analysis ◽  
Distilled Water ◽  
Water Production ◽  
Aluminium Foil ◽  
Solar Still ◽  
Performance Improvements ◽  
Energy And Exergy ◽  
Daily Energy ◽  
Energy And Exergy Analysis

Abstract Various scientists are looking for effective and easy solutions for augmentation of yield from the Hemispherical Solar Still (HSS). In this study, aluminium foil-sheet was used to reflect the intensity hence augments the evaporation rate and daily yield. Experimentations were conducted on two SS: the first SS is HSS; the second SS is HSS with reflective aluminium foil-sheet walls (HSS-RAFW). The highest distilled water production from the HSS, HSS-RAFW are 3.36 and 4.1 kg/m2, respectively. Compared to the HSS, the yield of distilled water was augmented by 22.21% when using the HSS- RAFW. The daily energy and exergy efficiency (EnE and ExE) of the HSS is 26.27 and 1.04%, respectively and daily EnE and ExE of the HSS-RAFW is 32.75 and 1.71%, 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

Experimental investigation of Brackish Water Desalination using a Semi Spherical Solar Still

2018 ◽  
Vol 6 (3) ◽  
pp. 69-75
Author(s):  
Ali A. F. Al-Hamadani ◽  
Mohammed G. Al-Azawyb ◽  
Mohammed Hameed Ghareeb Al Dulfi
Keyword(s):  
Climatic Conditions ◽  
Water Desalination ◽  
Distilled Water ◽  
Water Production ◽  
Solar Still ◽  
Black Paint ◽  
Incident Solar Radiation ◽  
Total Irradiation ◽  
Basin Water ◽  
Better Than

The intensity of radiation reaches 930 W/m2 during April, 2016 in Kut city. Thus this city is suitable to use application of solar energy such as solar still. An experimental study was performed to evaluate the production of Semi Spherical Solar Still (SS-SS) with and without Charcoal. It was measured in the climatic conditions of Kut, Wasit (32o N latitude), Iraq. The still consists of square basin of length 0.3 m and area 0.09 m2 made of Aluminum. The square absorber basin is painted with black paint for maximum absorption of incident solar radiation. It was found that the productivity of Semi spherical solar still without charcoal is better than the using of charcoal at depth of basin water (dbw=1.5 & 2cm). The productivity of SS-SS without charcoal was 2.7 lit/m2 for 6 hours at total irradiation 5935 W/m2. Whereas 2.5 lit/m2 for SS-SS with charcoal at total irradiation 5845 W/m2 for dbw=1.5cm. In addition, the instantaneous efficiency reaches 58% without charcoal and 70% with charcoal at dbw=1.5cm at 3:00PM. The salinity of water before desalination in SS-SS was 999.54 ppm and becomes 4.06 ppm after desalination. It could be concluded that the semi spherical solar still can be used for distilled water production

scholarly journals Effect of Vertical Permeability Heterogeneity in Stratified Formation on Electricity Generation Performance of Enhanced Geothermal System

Processes ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 744
Author(s):  
Yuchao Zeng ◽  
Fangdi Sun ◽  
Haizhen Zhai
Keyword(s):  
Energy Efficiency ◽  
Pump Power ◽  
Electric Power ◽  
Production Rate ◽  
Electricity Generation ◽  
Injection Pressure ◽  
Water Production ◽  
Permeability Heterogeneity ◽  
Vertical Permeability ◽  
Water Production Rate

Because geologic sedimentation and hydrofracturing processes are not homogeneous, the reservoirs of enhanced geothermal systems (EGSs) are also heterogeneous; this has a significant influence on the electricity generation performance of EGS. Presently, there are a lack of systematic and profound studies on the effect of vertical permeability heterogeneity in stratified formation on the electricity generation performance of EGS. In order to uncover the effect of vertical permeability heterogeneity on electricity generation performance of EGS, in this work we analyzed the influence of vertical permeability heterogeneity on electricity generation performance of EGS through a numerical method based on geological data at the Yangbajing geothermal field. The results indicate that when the average permeability of stratified formations is constant for a homogeneous reservoir, the system attains maximum water production rate, maximum electric power, minimum reservoir impedance and maximum pump power; with the increasing of the vertical permeability heterogeneity, the water production rate gradually decreases, the electric power gradually declines, the reservoir impedance gradually increases and the pump power gradually declines. When the average permeability of stratified formations is constant, with the increasing of the vertical permeability heterogeneity, the injection pressure and energy efficiency only changes very slightly; this indicates that the vertical permeability heterogeneity is not the main factor affecting the system injection pressure and energy efficiency.

scholarly journals An experimental study on small scale sea water desalination unit through solar power in Cox’s Bazar, Bangladesh

2014 ◽  
Vol 11 (1) ◽  
pp. 165-170 ◽  
Author(s):  
MM Islam ◽  
SA Uddin ◽  
Z Islam ◽  
MI Hossain
Keyword(s):  
Experimental Study ◽  
Heat Source ◽  
Sea Water ◽  
Water Desalination ◽  
Small Scale ◽  
Distilled Water ◽  
Solar Still ◽  
Average Amount ◽  
Transparent Glass ◽  
Glass Cover

An experimental small scale desalination system where solar energy as the main heat source was conducted in a remote area of Cox’s Bazar district of Bangladesh. In this investigation, the performance of three solar stills with transparent glass cover was studied. Treated sea water was given to the solar still and the quantity of distilled water from three solar stills was measured per day and the effectiveness of the stills was compared. The performance of these stills was checked for 20 days. The different parameters i.e. ambient temperature, Salinity, pH, Unionized NH3, Iron, NO2-N, Chlorine, DO and amount of distilled water were studied and analyzed. The average amount of water produced by the still (1) was 455 ml, still (2) was 394.75ml and still (3) was 339.25 ml. The total amount of water produced by the still (1) was 9100 ml, still (2) was 7895 ml and still (3) was 6785 ml. The average desalinated water were obtained 1.06 liter/m2/day, 0.98 liter/ m2/day and 0.95 liter/ m2/day from still 1, 2 and 3 respectively. DOI: http://dx.doi.org/10.3329/jbau.v11i1.18229 J. Bangladesh Agril. Univ. 11(1): 165-170, 2013

Cascade solar still for distilled water production

Solar Energy ◽  
1973 ◽  
Vol 15 (3) ◽  
pp. 245-258 ◽  
Author(s):  
O.St C. Headley
Keyword(s):  
Distilled Water ◽  
Water Production ◽  
Solar Still

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.

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