The Horse 2019/20

Technology & Environment

Knowledge deepening about the energy source oil

This is a deepening post for our original post about oil.

Switzerland and its oil usage

Even though the Swiss are very eco-friendly and, accorind to a survey in 2018, about half of our population wants to become an oil-free county in the next 20 years. But, in Switzerland about half of the energy is produced by oil. So getting completely rid of it wouldn't be easy. 30% of this half is made up of the usage of petroleum fuels like heating oil, and the other 70% are regular fuels like petrol or diesel. 
Switzerland imports about 80% of the oil from foreign countries, we are extremely dependent on our suppliers. In 2018 we imported approximitely three tons of oil. The three main suppliers are Nigeria, Lybia and Kazakhstan. More...

Knowledge deepening about the energy source WOOD

Current Situation in Switzerland:

The current situatio in Switzerland regarding corona virus also affects the timber market. Loss of sales markets, bottlenecks in transport and storage capacities and uncertain development of the construction industry represents challenges for the industry and lower demand. In Italy and France, the processing companies have been partially or completely shut down. It must be expected that a large part of the amount of wood must now be sold and processed domestically. It must be assumed that these bottlenecks will increase because of construction site closures, illness-caused failures of chauffeurs or failures of trucks and machines that may not be repaired in the near future. More...

VZ19A - Feedback round peers to peers

(randomly indicated by the teacher)

Note: The randomly indicated feedback plan is the minimum task - if you have additional ideas/feedback/double check calculations for other teams it will be appreciated by getting extra points!

Team X   giving feedback      to  => Team Y
The power of wind (Sangeetha & Yllza) => Tidal (Gezeiten) - Tidals of energy (Marco W.)
Oil - Why is Switzerland the European's leading oil user? (Seraina Wernli and Anna Meier)

=> The power of wind (Sangeetha & Yllza)

Energy source Wind (Silvan Vlaj, Luana Di Benedetto)

=> Oil - Why is Switzerland the European's leading oil user? (Seraina Wernli and Anna Meier)

Natural gas (Erdgas) / Biogas: Are all gases non-renewable? (Lucas and Sandro)

=> Energy source Wind (Silvan Vlaj, Luana Di Benedetto)

Solar (thermal) (Kolja Schenker and Michael Stutz)

=> Natural gas (Erdgas) / Biogas: Are all gases non-renewable? (Lucas and Sandro)

Development of coal (Dominic/Giorgio)

=> Solar (thermal) (Kolja Schenker and Michael Stutz)

Solar (photovoltaics) (Luca Maschek and Diego Di Martino)

=> Development of coal (Dominic/Giorgio)

Nuclear (Nina & Elena)

=> Solar (photovoltaics) (Luca Maschek and Diego Di Martino)

Wood as a source of energy (Nicole & Zeynep)

=> Nuclear (Nina & Elena)

Hydro energy (Luca Napolitano, Jan Tall)

=> Wood as a source of energy (Nicole & Zeynep)

Geothermal (Erdwärme) (Matteo and Alex)

=> Hydro energy (Luca Napolitano, Jan Tall)

Tidal (Gezeiten) - Tidals of energy (Marco W.)

=> Geothermal (Erdwärme) (Matteo and Alex)

Knowledge deepening on hydro energy

To learn more about the use of hydro energy in Switzerland we've put up a link from the official website of the governement.

- about 57 % of the domestic electricity production comes from hyrdo energy

- it is the most important domestic source of renewable energy

- there are about 660 hydropower plants in Switzerland

- the hydropower market is worth 1.8 Billion Swiss Francs

- the federal governement is promoting the future use of hydro energy

Hydro energy usage (bfe.admin.ch)

Jan Tall, Luca Napolitano

WOOD as a source of energy

The energy carrier wood is a renewable energy source. The wood for producing energy can be taken from the waste of carpenter works or trees that have disease or fall down from storms. How can you win energy from wood? The wood sticks or pallets that are burned, generate heath and this is were the energy comes from. Also something that is associated with wood a lot is charcoal. Charcoal is a solid fuel and is produced when air-dry wood is heated to 275 ° C without air and without oxygen. Charcoal is made by heating wood with the exclusion of air. In 2018, 141'000 tons of charcoal were used.

More...

Solar Thermal Energy

Solar thermal energy is the utilization of energy obtained from shortwave solar irradiance, transferred to a heat carrier medium. It also offers large-scale possibilities, such as high-temperature hot water for steam production and power generation. Interesting applications for urban energy planning include installations at building level or a possible connection with district heating networks.

 

More...

Tidals of energy

What is Tidal Energy?

Tidal Energy is a renewable energy source. It is produced with the ocean waters surge in and out with tides. For most tidal energy generators, turbines are placed in tidal streams. A tidal stream is a fast-flowing body of water created by tides. A turbine is a machine that takes energy from a flow of fluid. The tidal energy is much more powerful than wind energy, because of their different density. Unlike wind, tides are predictable and stable. 

knowledge deepening
I haven't found much informations for the real use of tidal energy, thats because it is not very much used. In switzerland you can't find tidal energy systems because we don't have a sea and its tides. The next tidal power station is found in france on the estuary of the rance river. Tidal energy has grown worldwide in the last few years because of companies, which invested in tidal energy projects. Researchers see tremendous potential and predict a major growth in the next decade. The tidal market is expected to grow around 10% in the period from 2017-2024. Because it is invented in 2007, there are not much new technical improvements or development. There are just a few obstacles for that energy source. A big problem is the price, you need to have very much capital to build a tidal energy system. Another obstacle is also the dependence on mother nature, you need a suitable site where tidal streams are consistently strong.

 

Examples:

1. In the United States, there are legal concerns about underwater land ownership and environmental impact. Investors are not enthusiastic about tidal energy because there is not a strong guarantee that it will make money or benefit consumers.

2. There are currently three different ways to get tidal energy: tidal streams,barrages and tidal lagoons. 

Quiz Question:

Where was the first tidal energy system constructed?

A - 2010 in America

B - 2005 in Germany

C - 2007 in Ireland

Vocabulary:

surge - sudden, strong movement forward
Tides - water level that has risen as a result of the moon's gravitational pull on the Earth.
density - how big is something, how many molecules does it have

source: Tidal energy, 2015 - (National Geographic.org)
            The development of Tidal Energy, 2019 (lagersmit.com)

By Devin and Marco

Speedy "gonzales" post: Hydro Energy

Hydropower is power which is gained from the energy of falling or fast-running water, which may be harnessed for useful purposes. Hydropower has been used as a renewable energy source since ancient times. It was used for the irrigation and operation of various mechanical devices, such as gristmills, sawmills, textile mills, trip hammers, dock cranes and domestic lifts. 

More...

The power of a tiny atom

What is Nuclear Energy?

Nuclear energy is a hot topic in today’s world. Renewable energy sources such as solar and wind haven’t yet proven themselves as viable solutions to meet the population’s wide-scale energy needs. With constantly growing energy demands, it’s imperative we explore nuclear as a dependable energy source. The process used to produce nuclear energy is called fission. Nuclear fission occurs when the atom of a nucleus is split, releasing very large amounts of energy. In nuclear power plants, atoms are continuously split, creating chain reactions that provide high amounts of sustainable energy for a long period of time. Nuclear Energy is not renewable.

Some Pros about Nuclear Energy: Low Greenhouse Gas Emissions, High Power Output, Inexpensive Electricity

Some Cons about Nuclear Energy: Past History of Nuclear Accidents, Target for Terrorism, Not a Renewable Fuel Source

Source: Kernenergie

Situation in Switzerland

In Switzerland there are 3 nuclear power plants. In the last few years the nuclear power plants lost their popularity, if you can say that like that. The danger and the waste produce of them is just too high. In 2017 the Swiss Voters accepted the energy strategy 2050. This means the nuclear power plants will shut down until 2050 and there will be no new ones built.

Impact on humans and the environement

If nuclear power is not handled correctly and there is a mistake, it can directly kill cells, or it can cause mutations to DNA. If those mutations are not repaired, the cell may turn cancerous. However Nuclear energy has perhaps the lowest impact on the environment. Including air, land, water, and wildlife of any energy source. It produces no harmful greenhouse gases, isolates its waste from the environment, and requires less area to produce the same amount of electricity as other sources.

How Long does it last

At the current rate of uranium consumption with conventional reactors, the world supply of viable uranium, which is the most common nuclear fuel, will last for 80 years.

Uranium mining

Uranium mining is the extraction of uranium from uranium deposits. The largest uranium mining countries are Canada, Australia, Kazakhstan, Russia, Niger, Namibia, Uzbekistan and the USA. Much of the uranium is extracted from civil engineering at depths of 100 to over 2000 m. Inadequate ventilation used to be the main cause of lung cancer among many miners. Mainly kidney damage has been found because everything the body excretes goes through the kidneys. As poisons, readily soluble uranium salts also damage the liver or lungs, they are nerve toxins and can cause diseases of the immune System.
Source: Uran-Munition 05.02.2018 (welt.de)
 

2 Examples

Efficiency of Nuclear Energy

Nuclear energy has by far the highest capacity of any other energy source. This basically means nuclear power plants are producing maximum power more than 92% of the time during the year. That's about 1.5 to 2 times more as natural gas and coal units, and 2.5 to 3.5 times more reliable than wind and solar plants.

Usage of Nuclear Energy

Nuclear Energy is mostly used to produce electricity for our households.

Quiz Question:

Ho much of the worlds electricity is produced by Nuclear Energy?

A) 20%       B) 14%      C) 49%

Source: Nuclear Power Facts

Vocabulary:

Renewable -> Erneuerbar

Fission -> Kernspaltung

Target -> Ziel

Nina & Elena