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Showing posts with label solar power. Show all posts
Showing posts with label solar power. Show all posts

Wednesday, 16 March 2011

Can Solar panels save me money?


Solar panels can actually make you money, as you might do well when you sell the house because people are looking for green homes, where the work has already been done.

Photo credit: AFresh1 Flickr.com

Solar energy will be money saving depending on whether you can meet the set up cost, you are essentially creating free energy instead of having to pay for it. Solar power enables you to to create your own energy.

Over the years,the cost of setting up a home solar power system has dropped because more and more people are using it, therefore technology is more widely available.

A grid-tie inverter will enable you to feed energy back into the grid power system, in some countrys,the energy you put back into the energy grid system may be paid for by the utility company gaining benefit from your contribution, so the cost of making electricity will definitely be used to bring down the cost of what you spend.

Solar panels will save you money but it depends on where you live in the world , you may get less incentives in a county that might have low sun light levels, such as in the northern hemisphere region.

In Europe, Germany has the most users of Solar panels so there would be more incentives there than in the UK.
Solar power energy also benefits the country by producing jobs.The best way to work out if solar energy can provide you with enough power to make it worth while, is to look at how much your energy consumption is at the moment and how much of that current use will you be able to generate using solar energy.




Thursday, 10 March 2011

Tank reservoir for solar energy

Tank reservoir's for solar energy come in the form of cylinders, calorifiers and heat exchange systems.
Calorifiers are the tanks are used to store hot water that has been heated by solar power, they can at around a 500 litre capacity, the larger range is from 500 litres upwards.

Solar heat exchangers transfer the heat from a reservoir( water tank) to a system such as swimming pool or your main home hot water tank, once the heat is pumped out of the system the water is then forced up the reservoir from the heat exchanger inside the tank back up to the system to be heated by solar energy .
 
Tank reservoirs for solar energy are usually vented or unvented systems, fed into a single or double coil unit, The tanks are insulated using polyurethane foam or wool thermal insulation. The insulation is to minimise any heat loss from the tank.

The best domestic use is for solar energy is for water heating.
For a high flow rate tank with efficient heat retention, prices usually start at 2000 euros.

Sunday, 6 March 2011

Disadvantages of Solar Energy



Photo credit: Wild Guru Larry  Flickr.com
Solar energy is a great example of one of the most successful forms of alternative energy, although these disadvantages mainly apply to mass produced solar panels, built on a small scale many of these disadvantages can be overcome.

- Solar power is still not available in all regions of the world

-There are hazardous by-product from the manufacture of solar power

-Expensive can take years to recover the cost although this is improving significantly

- At night you have to use solar battery which are charged during the day

- In order maximise the use of solar energy it must be installed in a sunny area, mountainous regions will be able to get less productive output than say sunny California.

- The efficiency of photovoltaic cells can be affected by cloud and pollution

-Disposing of the waste products from solar energy such as toxic batteries that may only on average last 10 years.

- Efficiency ratings of some solar panels are not as good so you need to check the the rating as some can only produce 14%

-Upfront cost compared to traditional means of energy supply. you may be able to heat the swimming pool year round, but maybe not the whole house.

- Low efficiency rates as solar energy yield through photovoltaic cells and energy transfer is low, although different forms and production methods of solar panels can change this.

- Great improvements are needed in the optical sensor array in order to increase efficiency of Solar panels.

Friday, 4 March 2011

Solar Power for your home

Solar energy in the home involves the capturing of solar radiation from the sun for use in light and heating.
In most cases solar panels are placed on a roof of the building and the sunlight is captured and transformed into electricity.

Photo credit: A.Siegel Flickr.com
The benefit of using solar energy for the home is that it is cheap (you don't pay for sunlight) and long term can provide a return on investment if you decide to sell your home.
The use of solar technology is improving considerably and the costs of setting up has come down in recent years.

Before installing a solar system in your home there are costs to take into account such as the cost of installation and cost of the components.
whether you use it for heating or electricity , you may want to calculate your break even costs which means how much energy will you need to produce versus how much the amount of money spent for installation and future maintenance.

There are many subsides or tax reductions out there available from the government to help you towards the cost of your home solar power system.
This will vary from country to country.

To have solar energy set up for your home, you have a device which allows for the sunlight to be collected, the panels are made from light absorbent material and are efficient because they work constantly. The solar panels are boxes that consist of a clear sheet such as glass , with a dark absorber inside the panel at the bottom, which traps the heat , this is all contained in an insulated system to stop heat escaping .

Once the heat is trapped using rocks, water or other liquids, vents or pipes transfer it to a place where it can be stored until used.

Solar energy designed for the home are produced using photovoltaic systems.
In order to have a greater benefit from solar energy, the home has to be well insulated with energy efficient appliances to reduce energy use, a good place to start would be to try and minimise wind drafts in your home if there are any.

A good setup of your home can would typically be a 4.5 kw pv system, a 2.64kW system can also work.
Before setting up a solar system you will need to be aware of how much sun you can generate per day in your location, as this will be the ultimate decider of whether you can install a PV system that will work best for your electricity needs.
Solar panel will need to be placed in a position with a good view of the sun with minimal shadow , such as a roof.
Most solar equipment for the home is fitted using licensed engineers, this is for safety reasons.