If we look at the energy generation of the city Leiden, there is only a little use of renewable energy generation. The percentage of the renewable energy generation in Leiden is far below the average of the Netherlands. There is just a little increase in the use of renewable energy which is to low for Leiden, a city of knowledge, innovation and development. Leiden must be one of the leading cities in sustainability of the world.
The county council of Leiden made a ‘Duurzaamheidsagenda’. The ‘Duurzaamheidsagenda’ is a report which contains the main goals to become a sustainable city. One goal is about the amount of renewable energy which must be 20% by 2020. There are four obvious ways of renewable energy generation, namely solar energy, thermal storage, geothermal and wind energy.
I compare the four obvious ways of renewable energy generation and investigate the possibilities for Leiden.
Heated water is stored in a buffer or tank. The heated water in the buffer or tank will be converted to energy by a heat exchange. Thermal storage is based on this concept. The municipality has already got some thermal storage, but this method is only successful in new buildings.
IF Technology investigated the possibilities for geothermal energy in the city Leiden. There is a geophysical potential, but the temperature which will be gained is very low (60 degrees). The current heating network is based on higher temperatures. So, geothermal energy can’t be used in Leiden.
Wind energy isn’t an alternative energy source anymore because it already delivers 3% of the electricity in the world. Wind energy is an effective way of energy generation, but is it realistic in Leiden? Windmills aren’t beautiful and make a lot of noise, nobody would like to have a windmill in his backyard. Windmills need a lot of wind which doesn’t exist in a city. There are two available places for wind energy in Leiden, the Oostvlietpolder and the A44. The Oostvlietpolder is a nature reserve which isn’t a suitable place.
The technology of solar energy is developing and the costs for solar panels are decreasing. The solar panels transform sunlight into electricity. Electricity will also be produced on a cloudy day. Solar panels can be placed on the houses in the city Leiden.
Solar energy might be the best option for a renewable energy generation. The video shows how a city uses only solar energy as energy source.
The efficiency of the solar panels is increasing. The panels can lie on the roofs of the buildings in Leiden, so they doesn’t bother the citizens of Leiden. However is it possible, in such a short period, to reach an increase of almost 18,5% renewable energy generation of the total energy generation by only using solar panels? And is it possible to become energy neutral? The technology is innovating which might be the solution. What will the new technologies bring? Is energy based on movements the future, or will it be bio-energy in our future? At last we have to remember: Leiden is a city of knowledge, innovation and development!
Noortje van Wanrooij