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Green hydrogen and wind energy

2021/11/30 > Back

For a long time, German industrial groups were seen as brakes on climate protection. For example, steel cookers and large chemical companies often shy away from investing in climate-friendly technologies. However, there is now a gradual shift. More companies want to drive forward the energy transition. According to calculations by the Federal Statistical Office, the corporations have doubled their climate protection investments within 10 years - from 1.6 billion euros in 2009 to almost 3.5 billion euros in 2019. Most of the money went into the expansion of renewable energies.

The steel industry is one of the largest German emitters of greenhouse gases, around one third of all industrial emissions come from the steel mills. Experts see the strategic shift to "green steel" as the last chance of survival for the battered German steel industry. The Federation of German Industries (BDI) called for speed in climate protection. By 2025, central political decisions must be made so that the climate-friendly conversion can pick up speed. Otherwise, the industry would lose competitiveness in international comparison. In order to achieve the 2030 climate targets, an additional 860 billion euros would have to be invested in Germany, the consulting firm Boston Consulting Group (BCG) has determined on behalf of the BDI. More than half of this is accounted for by the energy and industrial sectors. Above all, BDI President Russwurm calls for a German infrastructure program with better power grids, more wind and solar parks, hydrogen capacities and significantly more charging stations.

ThyssenKrupp has recently committed themselves to the 1.5-degree path and have joined the UN Race to Zero initiative. They plans to commission its first novel direct reduction plant in 2024 and wants to become climate-neutral by 2050, also are converting plants for the production of "green steel". In doing so, they are relying on massive federal aid and only if politicians create an infrastructure for green hydrogen, –emphasizes CEO Martina Merz.

What is "green hydrogen"?
Hydrogen is one of the most abundant elements on Earth. When used as fuel, it is called a "Hydrogen fuel cell" that generates electricity by chemical action. But the current way of making hydrogen is to use fossil fuels heavily, so it is the dirty "Grey hydrogen"; Green hydrogen refers to the use of wind power or solar energy and other green electricity to produce hydropower, so the power generation from the green hydrogen is almost no carbon emissions, water is the only by-products. Also hydropower is stable, easy to store and transport.

Wind power is a key role. One of the most important factors to make the generation stabilized is electromagnetic interference (EMI). Wind turbines may cause EMI via three principal mechanisms, namely near field effects, diffraction and reflection/scattering. Near field effects refer to the potential of a wind turbine to cause interference due to electromagnetic fields emitted by the generator and switching components in the nacelle. Diffraction occurs when an object modifies an advancing wavefront by obstructing the wave path of travel. Diffraction effects can occur when the object not only reflects part of the signal but also absorbs the signal. Reflection/scattering interference occurs when turbines either reflect or obstruct signals between a transmitter and a receiver. This occurs because when the rotating blades of a wind turbine receive a primary transmitted signal they act to produce and transmit a scattered signal. In this situation a receiver may pick up two signals simultaneously, with the scattered signal causing EMI because it is delayed in time (out of phase) or distorted compared to the original signal.

Because of the active development of green hydrogen, many countries is building more wind power facilities, if you encounter related EMI problems you are welcome to contact us for consulting the solutions for electromagnetic interference.

Data source: teema & tagesschau.de; cw.com.tw