Tag Archive: Electrical generation

Solar Power- How Does It Save The Environment

Solar Power- How Does It Save The Environment

You’ve probably heard a lot about solar energy and how efficient it is. Moreover, over the last few years, there have been several moves to see how effectively we can use solar power in an attempt to alleviate the energy crisis that the world faces. So, how does using solar energy fit into the bigger picture of protecting our environment? The point is that even small changes in the way we do things go a long way in terms of saving our environment.

Solar energy is a renewable energy source
The sun offers us a great source of renewable energy; it’s been around for over four billion years and is likely to stay around for another five billion years, during its life it will supply us with a steady stream of energy. So, apart from the obvious fact of solar energy is in abundance, people who are environmentally conscious find that using solar energy is an excellent way to help protect the environment.
But what makes solar energy an attractive option is the fact that unlike polluting fossil fuels, its availability is not governed by the oil industry, an industry that is riddled with capitalistic individuals, and influenced heavily by several geographic and political factors that invariably affect the supply.
Solar Energy on the other hand is a clean environmentally friendly energy resource and a very viable alternative to existing fossil fuels that pollute our lands, water and air, threaten our health, and contribute substantially to global warming.

Solar energy transformed into thermal (or heat) energy can be used to:
* Cook food – Using Solar Cookers
* Heat water – in Houses, Office Buildings, or Swimming Pools.
* Heat closed spaces – a Greenhouse, a House or even other Buildings.

Solar energy can also be converted to electricity by using:
* Photovoltaic devices or “solar cells” that transforms sunlight into electricity. These systems are often used in areas with no regular electricity supply. Some common devices that are sometimes powered by these solar cells include, street lights, road signs and some gadgets like watches and even calculators.
* Solar Power Plants are electricity generating plants that use thermal energy obtained from the suns radiation to super heat liquids that in turn become steam and rotate the turbines of a generator to generate electricity.

How can solar power rescue the environment?
For starters, switching over to solar power would help cut back our dependence on organic fuels. This in itself is a huge saving, reduced hydrocarbons and emissions in the air, mean fresh cleaner air. Some ripple down effects would be, controlling the global warming, less acid rain, no smog the list can go on and on, however, let me elaborate some of the better know environmental benefits.
Decrease air pollution

The most commonly obvious benefit is the fact that by using solar energy we are able to reduce the levels of pollution. As we reduce the amount of fossil fuels being burnt and switch over instead to solar power from our needs there is a corresponding decrease in the amount of pollution produced. Solar electrification in some rural areas also decreases the dependence of the electricity grid and generators that run on petrol or diesel.

Offsets greenhouse gases
Solar Cell (PV systems) generates electricity with absolutely no carbon dioxide (CO2) emission. This in turn plays a significant step in reducing the overall greenhouse effect that we face. Apparently studies show that approximately six tons of carbon emissions are offset through the use of a single Solar cell over a period of twenty five years.
Conserve energy

The world over, and especially the third world countries have begun to embrace the conservation and use of solar electricity through several conservations programs to help conserve power for urban areas, city lighting as well as commercial and industrial needs. While solar plants and other forms of decentralised solar generated energy is used to serve the basic power consumption needs in the majority of the developing areas.

Reduces discarding dry cell batteries
People in several countries around the world rely heavily on the use of small dry-cell batteries for various gadgets, like flashlights and radio’s. These batteries are primarily composed of lead acid and sometimes other materials that can be toxic to us. When the battery is improperly disposed off, they start leaking; toxic chemical contents seep into the surroundings and contaminate the soil, water or air around it. By switching over to the use of solar energy the dependence on dry cells batteries reduces drastically and consequently all issues associated with its disposal.

Low cost energy alternative
Using solar energy at home substantially reduces the need for dependence on electricity or gas. Solar panels placed on your roof top collect the solar energy and store them away in batteries for later use. This power can be used to power up lights around the house in the evenings or when it is dark. Solar thermal converts can be used to heat water that or even your home again offering substantial savings on those fronts. Solar cooking ovens could be used during the day for baking and cooking meals.

The use of “Solar Energy”, a fresh, clean, free and abundant source of renewable energy will over the course of time reduce our dependence on other sources of energy that aren’t as helpful to our environment. If you want to make a difference to the world you live in, this is a wonderful place to start.

The Ins And Outs Of Diesel Generators

The Ins And Outs Of Diesel Generators

swan & strike
Source: Flickr

Generators are used for electric power generation. Two categories of diesel generators are basically available in market- one is portable generator and the other is standby generator. Diesel Generators are mostly used to make sure that electric appliances can be run when there is a power failure. Standby diesel generators are mostly used in homes and offices and installed outside the house or office building. These are plugged in home wiring or electric power circuit. These can automatically detect power failure and start supplying power with in moments. Portable diesel generators are used on sites where there is much less supply of electric power and they can only run few small appliances like refrigerators, televisions and turnaces.

Diesel generators use comparatively less fuel and thus are more fuel efficient than power generated by gasoline or natural gas. For every liter of fuel consumed, diesel generators can run 2 to 3 times more efficiently than natural gas engines. There is no need of frequent maintenance for diesel engines, but gasoline engines need more frequent maintenance. Most diesel engines designed with water-cooled engine up to a speed of 1800 rounds per minute. This makes sure that the engine is durable, and makes it most dependable of all generators.

Unlike other natural gas generators and gasoline generators, diesel engines are very safe to use because they work on direct injection principle and they do not have any spark plugs. The unavailability of spark plug keeps them safe from fire. Diesel generator has a better shelf life. This is the least flammable source of fuel, hence can be stored for more time.

The fuel for the diesel generators is available at all gas stations and can be collected in comfortable cans. Main problems in case of diesel generators are: it is very hard to start them in cold weather, they are noisy and emit more smoke. Home diesel generators may cost $ 800 for 4 kilowatt to $10000 for a 15-kilowatt depending upon the rating, voltage consumption, quality and brand name. Diesel generators can also be used in industrial purposes. For industrial purpose they are available in range of 500 kilowatt to 2000 kilowatt.

Fuels such as diesel, gasoline, natural gas, or propane can basically power home generators. Some models of diesel generators also designed with multi fuel capabilities. The fuel choice of will depend on availability of fuel during emergency times.

Electrical Current As Pain Management

Electrical Current As Pain Management

Electricity, the natural force that Thomas Edison and Nikola Tesla engaged in a bitter rivalry over due to differing

theories, is quite a subject of human fascination. Like magnetism, many charlatans of the late 19th and early 20th centuries

claimed to have developed devices that could do everything from increase breast sizes, to curing illnesses like tuberculosis.

For the most part, these claims were fraudulent. However, recent evidence is starting to suggest that at least one claim of

these clever tricksters was not entirely false in nature. In the same way that testing is being conducted to determine what

effects magnetic fields have on pain management, some are theorizing that the closely-related force of electricity might also

yield benefits for relieving acute and chronic pain.

There is still quite a bit of controversy surrounding the supposed effects of electricity in the area of pain management, as

well as a heated debate over whether or not it has any effects at all. Still, some scientists have found the idea plausible,

largely due to the data obtained from testing conducted with magnetism. Magnetism and electricity have always been closely

related by science, so some find it reasonable to try and discern if electrical currents, properly conducted through the

body, can achieve effects similar to exposure to a magnetic field. The effect of causing pain is widely known, with death by

electric shock being among the many ways that Hollywood killers dispatch of their victims. However, the main interest of the

current generation of researchers lies in whether or not electrical current can dull the sensation of pain.

It is no secret that a small amount of electrical current travels through the human body, though only recently has it been

found that electrical stimulation of the brain can induce the release of endorphins, chemicals which can dull the pain

sensation. Naturally, the current has to be precisely applied and controlled, largely due to the risks of disrupting the

delicate balance of the brain. Others believe that the current itself can be used to directly fight pain, such as by

hindering or blocking pain signals from the brain to the body. Market-available devices that use this method, which are

largely used for back pain management, with adjustable settings to increase or decrease the current as the patient sees fit.

A more intense version of devices such as this has been developed, but require being implanted deeper under the skin.

The above examples apply alternating current in relieving pain. Another method, known as galvanic stimulation, applies direct

current, and often finds use in treating muscle injuries or cases with major trauma to bodily tissues. The afflicted areas

where galvanic stimulation is applied generally have experienced bleeding or swelling due to the injury. The direct current

is believed to generate an electrical field in the afflicted area, which is maintained by both positive and negative

electrical pads. In theory, the positive electrical pads reduce the flow of blood to the afflicted area to relieve swelling

and pain, similar to how ice packs work. In contrast, the negative pads are believed to increase circulation and,

theoretically, stimulate the healing process. Instructions for their appropriate use come with the pads themselves, though

patients may also inquire about their use with their doctors.

Cache In Your Chips And Get A Bus!

Cache In Your Chips And Get A Bus!

Power Backup Generators in Power Cut
Source: Flickr

Computer related terminology could sometimes be daunting to newcomers. These are relatively new words or hybrids of words, already in existence. Someone with a degree in English, for example, could not necessarily guess, the function of a particular devise, by its name. This is because such a devise never existed in history or in the history of the English language.
Tolerance and patience is required.
If you work in the field of computers, these “new” words must be learned. However, P.C.’s are designed for use by ordinary people, and the gritty details regarding their construction, can be largely ignored. A journalist, typist, builder or bookkeeper doesn’t need to know what an EIDE or SCSI is, or indeed isn’t.
Hard drive description is not relevant to the majority, as long as the devise is functional.
A “BUS”, though, could be guessed by some, as it carries something, not unlike a conventional bus. In this case, it carries current/electrons/data, and is simply a conductor. A bus conductor, if you like. For now, buses are made of copper with experiments underway to utilise other materials. I read recently that “prions”, which are a type of protein, are been considered as conductors. Will some of our computers’ components be organic? We shall have to see!
Fibre optics, which are, basically speaking, glass pipes around four thousands of an inch (0.1 mms. ), in diameter, employ the speed of light, for signal/data transfer. A light (diode), is on or off, at one end, and a photo-resistor at the other end registers its state. Now, wasn’t that simply put! These glass pipes are coated to reflect the light inwards, meaning that light can be “bent” around corners, while within its container/pipe. Heat generation is minimal and electrical resistance is redundant.
It is heat generation and resistance that brings your “fan” into play, keeping everything cool, and electron transfer at a controlled level.
Low resistance= high current. Your starter motor for your car has really thick cables allowing electrons from the twelve volt power source (battery) to do their job in turning over you engine, which is a considerably difficult task. A smaller cable would have a higher electrical resistance, causing it to overheat, and eventually, melt. Keep listening for that “fan”.
It is your computers first line of defence.
In fact, it is the principle of electrical resistance that is employed by electrical heaters.
CACHE is not legal tender in most countries, but a type of memory that your CPU (central processing unit ) first looks for. It does this, not to be awkward, but more because it is the fastest route, from a users point of view.