When our daily energy requirements are met by \’Green Energy\’, then we are using resources such as wind, tides or geothermal heat. They are considered \’Green\’ because they are environmentally friendly. When considering elements such as Wind Power and Windmills, in many cases we are looking back at the history of energy production. Regardless of this, we are mainly talking about using modern techniques to offer planet friendly and eco-efficient solutions.
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.
A process called Short Rotation Coppice (SRC), utilising trees such as Willow and Poplar, is used to meet the demands of such \’Energy Crops\’. Perennial grasses also produce a high 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.
Systems Based On Geo-Thermal Energy: The constant energy of the Sun heating the Earth results in both warm water and electricity being produced. 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 produced for every one unit used. A greate return of energy (sometimes almost 100 percent) is produced – because heat source pumps can operate in-line with wind turbines and solar electrical panels.
Wind Energy Programs: Without a doubt, wind energy has to be one of the oldest forms of energy production known to man. 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. In fact, the UK has the largest wind resource 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 just 1 percent. Instead of producing electricity at a rate of 2-10p per kWh, we could be generating at 2p per kWh. Because of this, it is estimated that it takes between half a year to three quarters of a year to cover the installation costs.
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.
By using a turbine, a Hydropower system can transfer the kinetic energy of moving water into another form. The important thing is that, without having to rely on water storage, the turbines can generate electricity. \’Micro-Hydro\’ however utilises old outdated sluices and dams. This process alone could meet 200mW of the UK requirement. Between 200 pounds and 3k per KW of energy output, is a good estimate of the overall cost of a project such as this.
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.
Electricians and Plumbers in particular are expected to provide the main thrust of domestic installation expertise. With EEC and UK recognition of renewable energy getting ever-higher on the political agenda, the grants and financial aid for introduction of these systems can only increase. Gaining installation certification across these areas can only provide further opportunity and job security to anyone already in related fields or looking to retrain. By mixing green training with those of electrical or plumbing, you could cover both angles.
Author: Scott Edwards. Pop over to Green Engineer Certification or Click HERE.
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