The function of the secondary condenser is to increase the rate of condensation of the evaporated water vapor in the still. Wshape solar still on concrete with two channel low cost lshape solar still by using wooden strips and aluminum channel l shape solar still was developed with plastic glazing on soil for distilled water output through single channel. This still will enable them to increase the quality and safety of their. The main solar still has rotating shaft driven by a small wind turbine in order to raise the temperature of water inside the still. Comparatively more distilled water was obtained from. Jan 31, 2019 a solar still will provide you with 100% pure water, and will not require purification or boiling prior to drinking. This research project is supported by the new mexico. Single slope solar still, cfd introduction now days, lack of drinking water is majour problem in most of the countries. Main page on solar stills a paper of their solar still project. The updated suns river solar still operated with nighttime recovery of distillate from heated cooling water resulting in regeneration of the next days cooling water is a process which can serve water needs for a family or a group of families. A single slope basin type solar still is fabricated with inner. While solar stills are able to remove salts and pathogens, their yields are. Design of solar still using phase changing material as a.
In particular, recent progress combining interfacial solar heating and vaporization enthalpy recycling through a capillaryfed multistage architecture, known as the thermallylocalized multistage solar still tmss, significantly improves the performance of passive solar. Factors affecting solar stills productivity and improvement. They are used in areas where drinking water is unavailable, so that clean water is obtained from dirty water or from plants by exposing them to sunlight. Solar stills for desalination of water in rural households. Double slope type solar still department of mechanical engineering page 1 maharana institute of technology and sciences gaura, mohanlalganj, lucknow a project report on construction of double slope type solar still submitted in partial fulfillment for the award of the degree of bachelor of technology in mechanical engineering from uttar pradesh technical. In this thesis, a basintype solar still was designed to investigate the effect of sun tracking in the performance of conventional solar still using actual environmental conditions.
Typical efficiencies for single basin solar stills approach 60 percent. Build a solar water distiller whether you need water for your iron or water to drink, this project is easy and inexpensive and can be scaled up as needed. Solar industry offers industry participants probing, comprehensive assessments of the technology, tools and trends that are driving this dynamic energy sector. Basically, the still consists of a blacklined shallow basin of saline water enclosed by a transparent cover with sloping sides.
Aug 26, 20 solar still,a water purifying technique project report 1. Ive posted here about the square foot solar cooker, and here is another of the many uses for it. Making a solar still is a very simple science experiment to try with your kids. Solar still,a water purifying technique project report 1. A solar still is a green energy product that uses the natural energy of the sun to purify water. Ultrahighefficiency desalination via a thermallylocalized. Even when the watercone becomes old and tarnished, it can still be used to collect rain water, as a roof panel or container for other goods. C abstract the only nearly inexhaustible sources of water are the oceans, which is of high salinity. Building a still prior to trip is advised for future still focused projects reduces trips to the. Twothird of the world is covered by the water, however the water scarcity is enormous.
In addition the project examined the performance of the still when heated both by solar energy and by an external source of heat supplied continuously in the form of hot water. Solar power projects are the most interesting projects and we are all well aware of the way that they are helpful in our real life also. The solar still can be used all day long, even if it is slightly overcast. New innovation of low cost solar still european journal of. Jordan, khalifa and hamood conducted experiments on solar still at latitude 31. The condensed water from the glass is collected in a pipe placed at. These objectives aim to guarantee that the solar still can be easily adopted and employed. Capillary still, desalination, solar still introduction. Aug 14, 2012 humankind has depended for ages on underground water reservoirs for its fresh water needs. Solar stills can be used in povertystricken areas, in deserts, at sea, and to help reduce energy costs and pollution as stills are environmentally friendly. Solar still,a water purifying technique project report slideshare. Stabilize operations to minimize operator attention required 3. There are numerous influences affecting the solar still productivity such as intensity of solar radiation, wind velocity, environmental temperature, glasswater temperature difference, water free surface area, deepness of water, inlet water temperature, area of absorber plate and glass cover angle.
A solar still augmented with a flatplate collector pdf. How to make a solar still dont buy plastic jugs of distilled water when you can convert it from undrinkable water with this diy project. Suitable modification of solar still can produce high output. A project report on solar still submitted in partial fulfillment for the award of the degree of bachelor of technology in mechanical engineering from rajasthan technical university, kota session 2012 guided by.
In areas where a solar still or a transpiration bag would be needed such as arid desert regions, the water produced is not sufficient for long term survival. Parameters affecting productivity of solar still and. Rich m grid threats 52 comments print this article. Aug 22, 2018 a solar still is an artificial water purifier that imitates the natural mechanism used by nature to purify water. Abstract a solar design project has been developed for use at the united states air force academy usafa in a sustainable energy course. Phase ii operations of the modular solar stills at bgndrf had several key goals. Photovoltaics and solar energy two activities grades. Passive vapor generation systems with interfacial solar heat localization enable highefficiency lowcost desalination.
Like the natural hydrological cycle, the sun drives the process of purification. Fabricated solar still a blackened tray is placed at the base of the solar still which acts as a black body to absorb the incident heat. Watch this video to learn how to turn salt water into drinking water. The hot water left out in the main still is sent to the inclined system of desalination which is placed below the main still.
A transpiration bag is another option that would help supplement a water supply. However, the separation of salts from seawater requires large amounts of energy which, when produced from fossil fuels, can cause harm to the environment. Solar still is an economical and easy method for production of pure water. Experimental evaluation of a single slope solar still. The proposed power plant will have solar pv modules, string inverters as the major components. Project goal design a small household solar still that can be built by villagers. In addition to residential, commercial, and municipal projects, a relatively new kind of solar project, community solar, has emerged as an efcient and afordable way for all new yorkers to gain access to clean energy. Large amount of water cant be used for drinking purposes because of the presence of salt and slit. But these sources do not always prove to be useful due to the presence of excessive salinity in the water. The model solar pilot law, or resolution, provides a sample template for.
In my opinion the current solar still designs are not a viable option for water procurement. Since one of the main goals of solar distillation is to provide a clean source of water, proper disinfection after construction is crucial. Improving the performance of solar stills using sun tracking. Here are simple instructions how to build a solar still to extract pure drinking water from the earth. How to build a solarpowered still to purify drinking water.
The sun evaporates dirty water which is then cooled and collected in pure form. How to build a solarpowered still to purify drinking. The heart of capillary still is a fabric woven or nonwoven which facilitates rapid evaporation of water at minimum heating. Solar stills are systems of easy operation and low cost that, through the use of energy. 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. The science, purpose, and benefits of a solar still.
Solar still efficiency n is the amount of energy utilized in vaporizing water in the still over the amount of incident solar energy on the still q t in jm2 day. Double slope type solar still department of mechanical engineering page 1 maharana institute of technology and sciences gaura, mohanlalganj, lucknow a project report on construction of double slope type solar still submitted in partial fulfillment for the award of the degree of bachelor of technology in. The us department of energy doe and a consortium of us utilities built this countrys first two largescale, demonstration solar power towers in the desert near barstow, california solar onesolar two have been scrapped since 2009. The condensed water from the glass is collected in a pipe placed at an inclination which enables the collected water 4. A solar still will provide you with 100% pure water, and will not require purification or boiling prior to drinking. This is a solar alembic, or pot still, made from square foot mirrors, which can produce between 2 and 5 ounces of distillate on a lazy sunny afternoon. Design of solar still using phase changing material as a storage medium kantesh. Solar still,a water purifying technique project report. The results showed, however, that the use of a secondary. Solar desalination is particularly wellsuited for backyard exper imentation by individuals with little or no technical training. Design options many different types of solar distillation systems were researched. Humankind has depended for ages on underground water reservoirs for its fresh water needs.
For solar still activity with standards, teachers guide, and student instructions, please see the solar stills challenge pdf, part of the 2011 international year of chemistry, or pbs learning medias solar still activity for grades 312. A solar still distills water with substances dissolved in it by using the heat of the sun to. However, from the simplest basin type models of solar still in earlier days. A community solar project brings revenues and benefts to a community and its residents in several ways. The solarstill process uses the sun instead of other sources such as fossil fuels to gain the energy needed for purification. The solar still process uses the sun instead of other sources such as fossil fuels to gain the energy needed for purification. Sep 17, 2012 how to make a solar still dont buy plastic jugs of distilled water when you can convert it from undrinkable water with this diy project.
Pdf 4 t this research a stepped solar still has been constructed and its. An overview of solar stills and capillary solar stills are discussed in this article. A thermal model for predicting the performance of a solar still with. The solar still performance was monitored under the conditions. Build a solar water distiller diy alternative energy. A solar still is an artificial water purifier that imitates the natural mechanism used by nature to purify water. A solar still desalination system with enhanced productivity. The great thing about this project is that it would be useful to know how to do in nature if you had no. Different solar stills were developed and evaluated for comparison with other solar stills available in market.
Detailed project report for 50 kwp grid connected roof top. The great thing about this project is that it would be useful to know how to do in nature if you had no fresh water to drink or in an emergency situation. The solar still technique will work just about anywhere, provided that there is enough sunlight to assist the process. Optimize recovery and thermal performance of the second effect night operations.
They are used in areas where drinking water is unavailable, so that clean water is obtained from dirty water or from plants by exposing them to sunl. A small homemade solar still operation and maintenance. Pdf new design of the stepped solar still researchgate. In particular, recent progress combining interfacial solar heating and vaporization enthalpy recycling through a capillaryfed multistage architecture, known as the thermallylocalized multistage solar still tmss, significantly improves the performance of passive solar desalination. Single slope solar water still sultan qaboos university. Design a small household solar still that can be built by villagers. We made ours with just a few common household items. How to build a solar still some redwood boards, a large black towel, copper pipe, a glass pane, screws, and these plans are all you need to make a solar still that will purify more than a gallon a. A solar still distills water using energy from the sun. Photovoltaics and solar energy derek nalley and scott pinegar.
Solar distillation of water florida solar energy center. A stepbystep guide on how to make a solar still with simple materials if stranded in an area with no water. Many researchers have undergone to produce drinkable water. This technical proposal highlights the implementation of 50kwp solar pv based power generation project at tamil nadu state under independent power producer ipp mode. Solar distillation offers an opportunity to provide a low. This project aims to develop a solar desalination device that will produce fresh water using direct solar energy and to enhance the production of fresh water trough. A very practical and thorough tutorial on how to build a smallscale solar still is available here. General operation is simple and requires facing the still towards solar noon, putting water in the still every morning to fill and flush the basin, and recovering distillate from the collection.
A solar still distills water with substances dissolved in it by using the heat of the sun to evaporate water so that it may be cooled and collected, thereby purifying it. Project description 64 the basic principle in the new design is to expose a considerably larger amount of water to sunlight than that. Pdf design and analysis of solar still researchgate. Modification and operation of a full solar distillation.
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