How to switch to renewable energy

Advantages and disadvantages of wind energy

Guide

In Northern Ireland wind energy is the most common renewable energy technology and it's also one of the most financially viable options.

Wind energy is generated using turbines which capture the natural power of the wind to drive a generator. The large wind farms seen around the countryside generally supply electricity to the national grid. However, the availability of a variety of turbine types and sizes means that you can generate your own electricity supply for use onsite.

Types of wind turbine

The two main turbine types available are:

Free-standing turbines, which are available in a range of sizes and can be used singularly or in groups. Small free-standing turbines are already in use at businesses throughout Northern Ireland.
Building-mounted turbines, which are usually installed on roofs. These are not currently widely used, although new designs are beginning to appear.

Advantages of wind energy

Wind turbines will work well across most of NI. Turbines will operate from low wind speeds of about four metres per second (m/s) but the most successful projects are in areas with an average wind speed of seven m/s or above.
It is one of the most financially viable renewable energy options and this is improving as the technology develops. The payback period for large, free-standing turbines is typically four to eight years.
Wind energy could generate a significant proportion of your electricity needs.

Disadvantages of wind energy

Wind turbine developments often meet significant local opposition at the planning stage due to their visual impact.
If there is no wind, the turbines don't generate any electricity. This is known as an intermittent technology. You would need a national grid connection for back-up.