When our daily energy requirements are met by ‘Green Energy’, then we are using resources such as wind, tides or geothermal heat. When ‘Green’, they are all thought to be replenishable and natural. When considering elements such as Wind Power and Windmills, in many cases we are looking back at the history of energy production. This idea 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. To gain electricity from roof panels you would need solar electrical panels (PV’s). Another key element is that of Biomass Energy, which relates to Stoves and Boilers burning Wood, Fuel and Pellets. Of course, then there is the heating from the Sun – often just 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.)
Thermal Solar Energy – This technology is based around two core types of system. First, we have Solar Water Heating Collectors, which absorb energy from the Sun and transfer this into hot water. Then we have the work of the Photovoltaic Heat Collectors, often called Solar Electrical Panels – which transform solar radiation into electricity. Typically, these panels are found on roofs – and need to be away from any light blocks such as trees, chimneys and other buildings.
With Solar Power being so common within the UK, it’s Solar Water Power that is most often used. 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. There are two options to fit these items. The first is to get a professional fit and the second is a DIY system, the first will cost around 2-5k and the second between 500 and 1500 pounds.
Biomass Energy Technology: Historically, this has come from plants and animals, though nowadays this also includes new genetcially engineered ‘energy crops’. Due to its adaptability, it can produce a range of energy forms – from heat and electricity through to combinations of both. It is interesting to note that the UK has some of the largest quantities of Biomass material to generate electricity within Europe. Considering all this, and the relative lack of C02 produced, makes the whole process highly green overall. To that end, many wood crops come from sustainable sources (as one tree is felled, another is planted in its place; thus the new tree absorbs the CO2 produced during the heating process.)
To meet the need, fast growing trees, known as Short Rotation Coppice (SRC) are utilised. Of equal importance is the ability to produce dry matter – and perennial grasses are very good for this. Of equal importance, although maybe less well known, are Municipal and Agricultural Waste. Agricultural Waste is commonly formed as a by-product of traditional agricultural work. However, waste derived from food or wood is another biomass entity – called Municipal Waste.
Geo-Thermal Energy Based Systems – Basically this is the warming of the Earth from the Sun – and is often used in the manufacture of warm water and electricity. By using the ground source temperature of approximately 12 degrees, we can either heat or cool buildings within the UK. Heat pumps are recognised as a very good form of power generation, generally giving back four units of energy for every one 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 – An Update On Old Technology: When you consider the milling of grain and pumping of water, it is easy to see how long wind energy has been with us. Whether to your home or to a local grid, when the energy has been generated it must be delivered to a point of usage – and cannot be stored. The UK is considered as one of the best sources of wind generation within Europe. For the fact remains that, within the UK, we have the ability to generate 10 percent of our requirement from Wind Production – as opposed to the current value of only 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. Due to this, we are looking at 6-9 months in total to cover the costs.
Finally, we have Hydropower; an area in which the UK does well within Europe. 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. The important thing is that, without having to rely on water storage, the turbines can generate electricity. ‘Micro-Hydro’ however, uses the dam and sluice systems that have been made redundant by the larger national distributions. Although a lesser known form of electricity output, this process could supply 200mW of UK demand. Installing systems like this could cost between 200 pounds and 3k per kW of energy created.
It is the growing worldwide energy requirement that is causing the growth in ‘Green Energy’. The UK remains one of the main beneficiaries of this technology.
It is the drive for installations in the domestic sector that looks to favour jobs such as plumbers and electricians. It is the political view of this type of energy generation that results in grants and financial aid becoming ever-more prevalent. It is important to gain the correct qualifications to install these items. You could consider either plumbing or electrical training programs that highlight green installation.
Copyright 2009 Scott Edwards. Hop over to Solar Energy Courses or www.electricaltraininginfo.co.uk/SolarEnergyTraining.html.