Solar distillation is the process in which solar heat is used to purify water from an impure water source by evaporation and condensation. When solar distillation is used to purify water from saline water, the process is also called solar desalination. Desalination converts saline water with high salt content, about 3.5% by weight in seawater and about 0.6% in brackish water, into fresh water suitable for drinking and other purposes. Use solar energy can be used for desalination, either as thermal energy through the use of solar thermal collectors or solar ponds, or as electricity. mainly through the use of photovoltaic cells. (more…)
Solar energy desalination is a method by which the sun’s energy is used to desalinate brackish or seawater to produce fresh drinkab ...
Since the 1980s, no large-capacity solar distillation plants have been built, mainly for the following reasons: Large installation ...
Solar dryers are special structures that enhance the drying power of the sun and protect the agricultural product from dust, dirt, ...
Active solar hot water systems water are usable with air, liquid, vapor or liquid collector fluid or gas to liquid process. Hot ...
Solar water heating for swimming pool rank as the most successful but least heralded commercial solar application. The use of solar ...
In contrast to electromagnetic suspension systems, electrodynamic suspension systems can provide stable suspension without a feedback system. Imagine a magnet held above a moving flat sheet of aluminum or copper. Following Ampere’s law of induction, an electric field is induced in the moving metal surface that causes eddy currents to flow in closed loops near its surface. The eddy currents in turn set up their own magnetic field, whose polarity, in accordance with Lenz’s law, opposes that of the magnet’s field. Consequently, the magnet is repelled from the moving metal surface, countering the force of gravity. If the magnet is pushed down toward the moving metal surface, the induced currents and the resultant repulsive force increase, restoring the equilibrium position automatically. Conversely, if the magnet is moved upward, the levitating force decreases. (more…)
All electromagnetic suspension-based systems employ some type of feedback control mechanism to maintain stable levitation. (An inte ...
Electromagnetic Suspension (EMS) system in which an array of magnets is attracted upwards to a steel rail. It is possible to de ...
Electrodynamic Suspension (EDS) can be viewed as an array of magnets moving over a conducting sheet and being pushed upwards by ...
A propulsion alternative is to transfer power to the vehicle and then have a magnetic structure on the vehicle that can create ...
The next time you hear an airplane flying overhead, look up, and pause for a moment. What you see is a machine that is heavier than ...
Frying oils and used vegetable oil are often thrown away by restaurants while they might serve as a true fuel for diesel engines, for example. Why not recycle? How to recycle frying oil?
The waste oil is bad for nature and especially for the aquatic environment. Sewage treatment plants are becoming more and more difficult to reprocess. (more…)
Biodiesel is diesel fuel made from renewable sources of carbon such as used vegetable oil or animal fats used in cooking. In di ...
Biodiesel is an ester that can be made from substances such as vegetable oils and animal fats. Biodiesel can either be used in ...
Biodiesel has many benefits. It is very easy to substitute for petrodiesel. Employees do not need special training to use it an ...
The United States depends heavily on imported oil to fuel its transportation infrastructure. The use of alternative fuel derive ...
Agricultural and forestry residues provide the largest proportion of biomass used for the production of biomas bioenergy. Some esti ...
Water power sources is an interesting source of energy. It is available freely in nature. The constant flow of water can guarantee the availability of energy. Water power take it sources of energy from the motion of water. The motion of water is happening in river, sea and water fall. This movement can be derived from two resources:
1. Flows of water streams, this is attracted by earth gravity force
2. Tides which are the rise and fall of sea level by moon and sun gravity force (more…)
The demand for electric energy by a community varies with the time of day and with the time of year. An electric power utility ...
Like solar radiation, the ocean is another widely available and distributed energy source. The energy in the ocean is in part k ...
Hydropower, also known as hydroelectric power, is the use of water to produce power. Harnessing water to perform work has been ...
Up to around 1980, hydropower research and development (R&D) efforts focused mainly on improving turbine efficiency, reducing c ...
The water levels of most of the world’s rivers fluctuate with seasonal rains, melting snows, or droughts, and in the arid zones ...