Studying for Solar Courses

Basically, the ‘Green Energy’ idea is how our everyday needs are supplied by natural resources such as wind, tides and even geothermal heat. They are considered ‘Green’ because they are environmentally friendly. It’s interesting to note that in some instances we’re actually travelling back in time to utilise some of the older energy skill sets e.g. Wind Power (Windmills etc.) But in the main, this is the process of utilising modern technology to provide eco-efficient and planet-friendly alternatives.

The home environment, for example, encompasses a range of energy ideas – including Solar Thermal and Solar Water Heating solutions. Equally there is electricity that is generated through roof-installed panels. Biomass Energy is the next phase, and this involves Fuel, Pellets, Stoves and Boilers burning Wood. What shouldn’t be forgotten is the heat stored in the ground from the Sun – often simply referred to as Ground Source Heat Pumps. Not all ‘Green Energy’ is new – by considering Wind Power and Hydropower we are looking at some of the oldest forms of energy production.

Solar Energy Systems: Also known as Solar Energy, this mainly uses two, albeit different types of solar panels to get the desired results. Initially, there is the process of obtaining hot water from the Sun via Solar Water Heating Collectors. Furthermore, there are the Solar Electrical Panels (more correctly known as Photovoltaic heat collectors) which transform solar radiation into electricity. Obviously situated away from blockages such as chimneys etc., these Solar Panels need to be mounted on south facing roofs at an angle of 30 degrees from the horizontal.

Within Solar Energy overall, Solar Water Power is most commonly used in the UK. With the capacity to deliver 50 percent plus of a household’s hot water requirement annually, Solar Water heating systems are crucial to energy in the UK. The average cost of installing this type of equipment is expected to range from 500 to 1500 pounds for a DIY system, through to 2-5k for a professionally installed system.

Biomass Energy Based Systems: Historically, this has come from plants and animals, though nowadays this also includes new genetcially engineered ‘energy crops’. Considering its ability to produce energy in the form of heat and electricity, this type of energy is extremely flexible. Furthermore, within the European Markets, the UK is one of the central producers of Biomass fuels. Considering all this, and the relative lack of C02 produced, makes the whole process highly green overall. Much of the UK wood crop is sustainable, in order to ensure that C02 produced during any heating process is absorbed.

‘Energy Crops’ trees such as Willow and Poplar play a major part in the process – under the banner of Short Rotation Coppice (SRC). Of equal importance is the production of perennial grasses – because of their yield of dry matter. Whilst Agricultural and Municipal waste may be lesser known, they are essential to the whole process. One natural offshoot of agricultural work is Agricultural Waste. Municipal Waste such as food or wood can also be utilised as a biomass product.

Geo-Thermal Energy Based Systems – This is primarily the heating of the Earth (mainly from the sun) and can be utilised in electricity and warm water production. In the UK, we are lucky that we can both heat and cool buildings from the ground source temperature of around 12 degrees. These heat pumps do need some power to operate; but for every one unit of energy they use, they generate four units of energy in return. Heat source pump energy can go one step further (by gaining a 100 percent return) if the energy to power them comes from items such as wind turbines or solar electrical panels.

Wind Energy: The use of wind as a source of energy has been going on for thousands of years, especially in milling grain and pumping water. However, in more recent times there’s been the option to recover the energy for its own sake – and deliver this either to a home unit or to the local power grid. The UK is considered as one of the best sources of wind generation within Europe. It is interesting to note that whilst we can produce 10 percent of our entire power requirement from wind power, at present we only produce 1 percent. Instead of producing electricity at a rate of 2-10p per kWh, we could be generating at 2p per kWh. From this, the estimation of the cost recovery period is around 6-9 months overall.

Within the UK, Hydropower suits the energy generation model. Just like a thousand years ago, we are utilising the energy from water. Interestingly enough, this type of energy production meets around 2 percent of the UK electrical total demand.

Using a turbine, a Hydropower system can transform the energy of water into other forms. Utilising natural river runs, or water drop-offs (through dams,) the turbines can work without a reservoir of water. A ‘Micro-Hydro’ system creates energy through the use of dams and sluices (that are no longer a part of the national distribution system.) Having been reviewed recently, this form of electricity supply could provide 200mW of the UK capacity. Installing systems like this could cost between 200 pounds and 3k per kW of energy created.

‘Green Energy’ is growing – mainly due to the demands of the Western World. That said, the UK is well placed – especially in the domestic sector – to take full advantage of the items above.

Once again, it is the Electrician and Plumbing trades that are set to capitalise on the domestic installation process. Grants and financial aid is also set to increase within the EEC and the UK – as ‘Green Energy’ gets ever higher status. As a new industry, there are a range of new certificates to gain. To cover both ends, you could consider electrical or plumbing training along with green systems.

Author: Scott Edwards. Check out CLICK HERE or Solar Energy Training.