Abstract this work presents the development of a flexible, efficient, robust and low cost single solar still. Introduction drinking water is still a big problem in most arid and remote areas. Thermal model and characteristics of double slope solar still. Kumar et al2 observed that annual performance of an active s4 is optimum at gta of 15 in indian conditions. Experimental setup two identical a single basin double slope solar still have been designed and fabricated with mild steel plate, as shown in figure 1a and figure 1b. Single basin double slope solar still with minimum basin. Comparative output from newly developed solar still was low but it has several advantages that it is cheapest, cost efficient and easy to clean. The methodology followed to achieve these objectives, via analytical analysis. Experimental investigation of double slope solar still for. Ahmad studied about singleeffect solar stills with an internal condenser 3. The results showed that the solar intensity, water temperature, and ambient temperature affected the magnitude of and exergyexergy efficiency.
It has been found that the single slope solar still produced 3. Analysis of double slope single basin solarstill using photo. The main reason for using two identical units is to arouse the. Two experimental stills of the same basin area will be fabricated and will be tested the performance of double basin double effect single slope solar still with and without nanofluid simultaneously. Single basin double slope solar still, solar energy, active techniques, etc. The same basin were used in double slope still with condensing cover 4mm thick placed at angle of 30 height of the glass is 700mm and the breadth is 600mm. Double slope solar still for the production of potable. Pdf cfd analysis of single basin double slope solar still. In this research, the productivity of water by a double slope solar still was determined by varying the water depth and surrounding temperature for nine days in the premises of lagos state university, ojo, nigeria at 6.
The impure water in the solar still is heated by solar radiations. The interface of the inner and outer basin was lined with concrete, to reduce the heat loss through the bottom. The experiments were conducted for many days with different brine depths in. Double slope type solar still department of mechanical engineering page 46 components of solar still solar still is a simple device which can convert available water or brackish water into portable water by using solar energy.
Aug 14, 2012 in this paper, the fabrication of seven solar still designs such as spherical solar still, pyramid solar still, hemispherical solar still, double basin glass solar still, concentrator coupled single slope solar still, tubular solar still and tubular solar still coupled with pyramid solar still and their performance evaluation in converting. Performance investigation on double slope solar still. Decreasing the thickness of the water layer and adding the dye increase the amount of distilled water. The results clearly states that the productivity of the solar still is inversely proportional to the water depth. Volume 2, issue 11, may 20 double slope wicktype solar. Evaporation and condensation are the basic principles used in solar still. Double slope wicktype solar still the below fuzzy logic relation can be used to describe the proposed double slope wicktype solar stills productivity with respect to the parameters viz. A comparative performance study of double basin single slope.
The higher the solar intensity and the temperature of the water, the higher and exergy. Formation of the solar system documentary the inner secrets of planets and star touch your heart 427 watching live now 30 minute fat burning home workout for beginners. Design and fabrication of a single slope solar still with variable collector angle. Fabrication of solar still two identical singlebasin double slope solar stills were fabricated and used. Pcs are the chemicals which enhances the evaporation rate of water in solarstill in the presence of sunlight without reacting with water and without getting consumed. Comparative performances of single, double slope solar stills. The height of the lower vertical side of solar still was kept at 0. Tiwari have reported that the thermal efficiency of double slope passive solar still is higher than the double slope active solar still 14.
The double sloped basin still has two sloped pieces of glass rather than one. The performance testing and analysis of a double glazed, airblown corresponding author. In this work, an attempt has been made to perform energetic and exergetic analysis of a double slope solar still. Single slope solar still, cfd introduction now days, lack of drinking water is majour problem in most of the countries. An analytical thermal model has been developed by dwivedi and tiwari for double slope active solar still 7. Pcs are the chemicals which enhances the evaporation rate of water in solar still in the presence of sunlight without reacting with water and without getting consumed. In the present work, single slope double basin solar still performance has been investigated with and without using al 2 o 3 nanoparticles at the location 20. Effect of glass inclination angle on solar still performance.
Performance enhancement study on single basin double slope. Experimental attempt was carried out to enhance the solar still productivity by means of agitation effect. Experimental analysis of double slope solar still aniket kavlekar1 1department of mechanical engineering 1vit university vellore, tamilnadu, india abstractwith rising population, industrialization and environmental pollution, availability of portable water is shrinking day by day. Exergy analysis of double slope active solar still under. Enhanced performance of a single basin double slope solar still with thin film of water flowing over the cover plate. Nano fluids improved the solar still water productivity by about 116% when the still integrated with the external condenser.
Single basin solar still is a valuable solution for this problem. Performance study of a single basin single slope solar. Double slope single basin passive solar still is the best choice for drinking water prone remote areas investigations show its limitation because of its lower performance in terms of distillate output. Single basin solar still is a very simple solar device used for converting available brackish or water into fresh drinking water. They found that the productivity of the distiller with a vertical mirror is 20 % greater than that of the double slope still. Experiments were performed on a single basin double slope solar still in the premises of shiatsdu allahabad. This device can be fabricated easily with locally available materials. Solar distillation is a process of producing purified drinking water from brackish water by using the heat of solar radiation as the feed to evaporate the impure water which on condensation gives the pure water. Kamal 3 analyzed double slope solar still ds3 for doha qatar climatic conditions and. Performance study of a single basin single slope solar still.
An experimental investigation of the factors which affect on. Analysis of double slope single basin solarstill using. Performance improvement of double slope solar still using. Original research open access performance correlation for. In this work, the experimental modification was carried out in the single basin single slope solar still to improve the performance. A solar still is a simple solar device used in converting saltbrackish water into potable water. A basin type double slope solar still was fabricated with mild steel plate with overall size of 2. For a 300 inclination of glass cover, the required height of the other vertical side was 0. Paper open access exergy analysis of double slope passive. Solar still type and yield still type yield lm2day angle 24. Design and fabrication of a single slope solar still with. A single basin double slope solar still with an inner basin size 2. Solar still is an economical and easy method for production of pure water.
Most of the water resources are under the stage of depletion. The temperature of water surface is closely related to the incident solar radiation. The performance of the double basin double slope solar still was higher than the single basin double slope solar still under insulated and uninsulated conditions. Effect of glass slope angle and water depth on productivity. International journal of energy and environmental engineering 20. One of the methods used to get the fresh water from the brackish water is solar distillation and the means used is called as a solar still. The two main categories of basin stills are single and double sloped. Enhanced productivity of doubleslope solar still using local. The year round performance of the still in a particular place is mainly affected by the variations in transmittance of the covers and solar irradiance on the covers. Effect of water depth and temperature on the productivity of. Performance correlation for single basin double slope solar still. One still was used as a reference unit and the other one as test unit.
Effect of nanofluid in single slope double basin solar still. The main parts of still are basin, frame, glass cover and support structure. A schematic diagram of the doubleslope singlebasin solar still is shown in figure 1a, and a photograph of the experimental setup of doubleslope singlebasin solar still with an inclination angle of the condensing glass cover 11 is shown in figure 1b. Experiments were conducted in different water depth 1cm, 2cm, 3cm and 4cm. The solar still is nonconventional, cheap, simple, easy to construct and is of low thermal capacity. Also, the selected geometry of the solar still was based on the total amount of the transmitted solar energy through the year, i. An experimental study was conducted to enhance the productivity of double slope solar still by storage of thermal energy in day time with the help of phase change materials pcm. A double slope single basin solarstill with basin area 1 m2 is used for solar desalination. Solar still is a simple device which can convert available waste or brackish water into potable water using solar energy. For this purpose two double slope solar still of same size are used in the experimental work. The distilled water productivity of the single basin single slope solar still is very low. An approach to optimization of double slope solar still. A single basin double slope solar still with basin area 1. The absorber area of basin and collector of solar still are 0.
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