In a nutshell, ‘Green Energy’ utilises natural resources such as sunlight, wind, tides and geothermal heat to provide our daily energy requirement. They’re all considered naturally able to replenish and thereby ‘Green’. The older energy skill sets often have value set in times gone by especially when we think of wind power and windmills. This option is preserved by the use of technology, eco-efficient options and planet friendly alternatives.
The home can use a range of new ideas to help with energy usage including Solar Thermal and Solar Water Heating Collectors. Equally there is the basic electricity generated through roof-installed panels. 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 come it – now often called Ground Source Heat Pumps. At the end there are two of the most mature forms of energy methods in the UK albeit renamed as Wind Turbines and Hydropower.
Through a brief review of each we can look at those wanting to train and work in this area and the skills that they will need. Considering the points raised so far, this is expected to be somewhere in the domain of the Plumber, the Gas Engineer and the Electrician. It would be worth gathering information from as many different sources as possible, so check out our other pages on Electrical, Green and Plumbing careers. So it is worth checking out the sites for a variety of training providers as a result bookmark (CTRL-D) this page so you can come back.
Thermal Solar Energy Systems: This technology is based around two core types of knowledge to achieve the results known as Solar Energy. First, we have Solar Water Heating Collectors, which absorb energy from the Sun and transfer this into hot water. Whereas Solar Electrical panels or Photovoltaic heat collectors transfer solar radiation into electricity. Obviously situated away from blockages such as chimneys these Solar Panels basically need to be mounted on south facing roofs at an angle of 30 degrees from the horizontal.
For the UK this is often considered the most popular form of ‘Green Energy’. With the ability to provide almost half the annual need for hot water in the house then Solar Water heating systems is very important. The cost of fitting depends on whether you do it yourself – 500 to 1500 pounds or whether you get a professional fit in which it will cost between 2-5k overall.
Biomass Energy Systems – Includes all natural forms derived from plant and animal products such as wood, straw, poultry litter and ‘energy crops’. It’s the ability of this power source to generate diverse forms of energy such as heat and electricity that makes this so adaptable. It is a useful point to make that the UK is one of the major producers of Biomass fuels within Europe. It should be borne in mind that the whole process is designed to produce energy without an impact on CO2. That being said the process where each tree felled is replaced by another helps to reduce the overall effect on C02 as a part of energy produced.
A process titles Short Rotation Coppice (SRC) such as Willow and Poplar are used to meet the demands of such ‘Energy Crops’. Perennial grasses are also responsible for large quantities of dry matter. Of equal importance, although maybe less well known are Municipal and Agricultural Waste. Using normal agricultural activity, Agricultural waste is a natural by-product. Another biomass element is that called municipal waste and this comes from wood or food goods.
Systems Based On Geo-Thermal Energy: Used in the generation of warm water and electricity this energy mainly comes from the Sun and heats the Earth. Having a consistent ground temperature of around 12 degrees centigrade is fortunate for the UK as it allows both the heating and cooling of buildings. With four units replaced for every one unit of energy used these heat pumps are very effective. This system can go even further if energy efficient items such as wind turbines or solar electrical panels are used.
Wind Energy Based Systems – The use of wind as a source of energy has been going on for thousands of years, especially in milling grain and pumping water. That aside the ability to generate energy and transfer this onto homes or the local grid has been a relatively new option. In fact, the UK has the largest wind resource within Europe. Potentially we can produce 10 percent of our annual energy needs through wind power although at present within the UK we still only use 1 percent. Although electricity is still being produced from between 2-10 p per kWh it could be generated from as little as 2p per kWh. Due to this we are looking at 6-9 months in total to cover the costs.
Within the UK, Hydropower is an energy process that suits the energy generation model. The ability to utilise energy from moving water, much like wind power, has been going on for thousands of years. That said, this type of energy can generate around 2 percent of the total electrical demand for the UK.
It is a Hydropower process, using a turbine that can convert the energy from one for into another. It is by either water drops or Natural River runs that turbines can work through this process ‘Micro-Hydro’ however avoids this system killed off by the larger national distribution methods and plans to use the outdated sluices and dams. This smaller form of electrical output has been recently reviewed and could allocate some 200MW of capacity to the UK system. The expected cost of installing a system such as this would be between 200 pounds and 3k per kW of output.
It can be seen that the route to ‘Green Energy’ is growing considerably, especially in light of the need for increasing energy outputs throughout the Western World. To be fair, the UK domestic market is leading the resurgence with the variety of schemes detailed above.
With the bulk of development work in the domestic field both the Plumbers and Electricians are set to capitalise in this area. You can now get a range of grants to support the growth of renewable energy ideas within the European market. Equally important is the role of gaining qualifications to install items that we have talked about. By mixing green training with those of electrical or plumbing you could cover both angles.
Written by Scott Edwards. Check out Solar Training or Green Certification.