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.
Within Solar Energy overall, Solar Water Power is now commonly used in the UK. Solar Water heating systems can provide over 50 percent of a household’s hot water requirement during the year. 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 – 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.
By the growth of Short Rotation Crops (SRC) the UK is able to maximise the ‘Energy Crops’ return against the plant production overall. Of equal importance is the production of perennial grasses because of their yield of dry matter. Whilst Agricultural and Municipal waste may appear lesser known they are essential to the whole process. Agricultural Waste is commonly formed as a by-product of traditional work in agriculture. Because it comes from food or wood Municipal Waste is also considered a useful biomass product.
Systems Using Geo-Thermal Energy – This is primarily the heating of the Earth (mainly from the sun) and can be utilised in electricity and warm water production. Using the ground temperature of around 12 degrees in the UK we can both heat and cool buildings. Whilst these heat pumps require energy to operate their rate of return is excellent being four units kept for every one unit of energy used. The energy generated by a heat source pump can in fact be considered 100 percent renewable, if the power to operate the pump comes from solar electrical panels or a wind turbine.
Wind Energy: When you consider the milling of grain and pumping of water it is easy to see how long wind energy has been with us. 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. With regard to wind generation it is the UK that has the highest production within Europe. The fact remains that in the UK there exists the ability to realise 10 percent of our electricity requirement from wind power as opposed to the current value of 1 percent. Frankly, electricity can be realised from as little as 2p per kWh as opposed to the current level of 2-10 p per kWh. Recovery of the cost involved is somewhere between 6-9 months.
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.
By using a turbine a Hydropower system can transfer the kinetic energy of moving water into another form. By using a dam or a natural river process these turbines do not require water storage. Alternatively ‘Micro-Hydro’ systems use hitherto outdated sluices and dams to generate electricity. This process alone could meet 200mW of the UK requirement. When considering the install cost of items such as this it is worthwhile to think about the return which rests somewhere between 200 pounds and 3k per kW of energy created.
The demand on ‘Green Energy’ continues to develop in light of the energy demands worldwide. That said the UK is well placed, especially in the domestic sector to take full advantage of the various items above.
With the rise in demand for domestic installations both Electricians and Plumbers are well placed to take advantage of this technology. Not only in the EEC but also in the UK ‘Green Energy’ is rapidly gaining ground as the way forward and a range of financial incentives are in place to support this. It is by gaining the right certificates across the board that will help opportunities and job security for the long term. To that end it may be worth thinking about combined training where you can get plumbing or electrical training along with green knowledge.
Copyright Scott Edwards. Check out www.plumbercourse.co.uk/Solar-Training.html or Green Certification.
