A Background In Solar Training

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 range of renewable energy technologies utilised within the home environment includes both Solar Thermal, and Solar Water Heating Collectors. For electricity created through roof-installed panels, you would need Photovoltaic Panels or PV’s. Then there are Stoves that burn Bio-Pellets – which make up the subject commonly known as Biomass Energy. What shouldn’t be forgotten is the heat stored in the ground from the Sun – often simply referred to as Ground Source Heat Pumps. At the end there are two of the most mature forms of energy production in the UK – albeit renamed now to Wind Turbines and Hydropower.

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.

As a result, Solar Water Power is often considered the most common form of Solar Energy in the UK. 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 and ‘Energy Crops’ – This is a ‘capture all’ phrase which includes all natural materials. e.g. Wood, straw and poultry litter – but nowadays also includes modern ‘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. Indeed, within the European Markets, the UK has some of the leading levels of Biomass material at hand. It is the minimal C02 produced, alongside the actual energy production, that makes this attractive to the markets. As each tree felled, it is replaced by another. This helps to reduce the overall effect on C02.

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.

Systems Using Geo-Thermal Energy – The constant energy of the Sun heating the Earth results in both warm water and electricity being produced. Within the UK, the constant ground source heat temperature is around 12 degrees centigrade – and can be utilised to both heat and cool buildings. Generally, items such as Heat Pumps are thought of as very effective, as they produce four units of energy for every one that is used for generation. 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.

Wind Energy Systems: Wind Energy as a sustainable source of energy has been going on for millennia. 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. The ability to utilise wind generation is considered to be greatest in the UK. 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. Electricity can be produced from as little as 2p per kWh, but generally comes in somewhere between 2-10p per kWh. Recovery of the cost involved is somewhere between 6-9 months.

Then there is Hydropower – something within Europe that the UK excels in. Although new in its approach, the act of harnessing energy from water has been going on for a long time. 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. Turbines use either a water drop (e.g. through a dam) or by a natural ‘run of the river’ – thereby having no water storage reservoir. ‘Micro-Hydro’ however utilises old outdated sluices and dams. Whilst considered a smaller form of electrical output, this system is thought to be able to give some 200mW of capacity to the UK. 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.

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.

(C) Scott Edwards 2009. Visit Solar Energy Courses or Click HERE.