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It is the use of tides or wind to deliver our daily energy needs that form 'Green Energy'. 'Green' basically means that all the energy is renewable. 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.) Overall, this is the method of using modern techniques to provide eco-effiency and planet friendly options.

In the home environment, one can see examples such as Solar Thermal and Solar Water Heating Collectors. For electricity created through roof-installed panels, you would need Photovoltaic Panels or PV's. Equally important is that of Biomass Energy - which includes Stoves, Fuel, Pellets and Boilers burning Wood. Then we have the ancient energy of the Sun and the heat that comes from it - now called Ground Source Heat Pumps. Finally, we have two of the most traditional forms of energy generation that have gone through some resurgence over the last few years; these being Wind Power, Wind Turbines and Hydropower (including Water Wheels.)

Solar Thermal Energy - By using different technologies, Solar Energy is effectively made up of two types of solar panels. Initially, there is the process of obtaining hot water from the Sun via Solar Water Heating Collectors. Additionally, there is the method of converting solar radiation into electricity known as Photovoltaic - or simply Solar Electrical panels. To get the best results these panels need to be south facing at an angle of around 30 degrees from horizontal, and away from blockages.

With Solar Power being so common within the UK, it's Solar Water Power that is most often used. Solar Water heating systems can meet the need for more than half of all hot water needs in the domestic market. 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 Systems - Including all natural energy forms derived from plant and animal products - such as wood, straw, poultry litter and 'energy crops'. Considering its ability to produce energy in the form of heat and electricity, this type of energy is extremely flexible. The ability to generate electricity is one of the UK's main green strengths - as it has one of the larger Biomass legacies within Europe. It should be borne in mind that the whole process is designed to produce energy without an impact on CO2. Having a tree planted in place of another (that is felled for energy production) helps overall.

To meet the need, fast growing trees, known as Short Rotation Coppice (SRC) are utilised. Perennial grasses are also responsible for large quantities of dry matter. Within this process also sits the lesser known Agricultural and Municipal Wastes. To begin with, Agricultural Waste is often produced as part of the agricultural process overall. However, waste derived from food or wood is another biomass entity - called Municipal Waste.

Geo-Thermal Energy Based Systems - By naturally heating the Earth, the Sun has the potential to generate both warm water and electricity. Within the UK, the constant ground source heat temperature is around 12 degrees centigrade - and can be utilised to both heat and cool buildings. Heat pumps are recognised as a very good form of power generation, generally giving back four units of energy for every one used. By using energy from solar electrical panels or wind turbines to power them, heat source pumps can be almost 100 percent renewable in energy production.

Systems Based On Wind Energy: As an energy source, wind energy has to be one of the oldest forms of energy creation in history. 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. To be fair, the UK has the highest level of wind generation within Europe. Although, within the UK we currently only utilise 1 percent of electricity from wind, yet the potential rests at a surprising 10 percent. Rather than electricity production running at 2-10 p per kWh, it could be run at 2p per kWh. Recovery of the cost involved is somewhere between 6-9 months.

Hydropower is a method that suits the UK energy production system. Although new in its approach, the act of harnessing energy from water has been going on for a long time. Within the UK, this form of energy production is responsible for somewhere in the region of 2 percent of all electrical needs.

A hydropower system uses a turbine to create energy from moving water. By using a dam or a natural river drop, these turbines do not require water storage. A 'Micro-Hydro' system creates energy through the use of dams and sluices (that are no longer a part of the national distribution system.) Although a lesser known form of electricity output, this process could supply 200mW of UK demand. When considering the installation cost of items such as this, we're looking at somewhere between 200 pounds and 3k per kW of energy created.

Because of the energy need of the Western World, we are now seeing a rapid rise in 'Green Energy'. The UK domestic market appears to be one of the core beneficiaries of this technology.

With the rise in demand for domestic installations, both Electricians and Plumbers are well placed to take advantage of this technology. With 'Green Energy' rising up the political agenda in Europe, a range of financial aids and grants are becoming available. It is important to gain the correct qualifications to install these items. Electrical or plumbing training that incorporates green technology could be very useful for the future.

(C) S. Edwards 2009. Check out Renewable Energy Certification or Green Engineer Certification.

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