Energy & Environmental Technology

PROvendis offers energy-efficient and environmentally friendly technologies for licensing, to purchase or for development cooperation.

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Recycling of coated light metals

Much of Europe has a circular economy in which most metallic materials, such as various construction materials and beverage cans made of aluminum, are recycled. Fundamentally, two different forms of aluminum is used in industry.

Rotor blades for low wind speeds

A rotor geometry modeled on maple seeds has been developed that enables more efficient operation of wind turbines and fans. It is a geometry that is easy to manufacture and cheaper to produce than conventional rotor blades.

Fin plate

The device is particularly advantageous for the transportation and assembly of wind turbines. Vortex-induced vibrations are significantly reduced or avoided. In principle, the device can be used for all cylindrical structures (e.g. pillars) that need to be protected from vortex-induced vibrations.

Rain gutter water level monitoring

Gutter blockages caused by leaves, dirt and other debris can prevent the flow of water in the gutter, which can lead to considerable damage and problems. Water can spill over the sides of the gutter, causing water damage to the foundations or other parts of the building. In addition, standing water in the gutter can attract insects such as mosquitoes and serve as a breeding ground. In colder climates, the accumulated water can freeze and form ice dams that damage the roof or the gutter itself. Researchers at the University of Siegen have found an innovative solution to this problem by equipping the gutters with a water level sensor.

Climate-neutral steelmaking

Novel raw material input for the production of green steel. In addition to hydrogen, a carbon-containing aerosol is used to produce green steel.


New analytical method for quantification in lightweight materials such as plastics, polymers or refuse-derived fuels using X-ray fluorescence analysis.

Thermoelectric water heat pump

With the new thermoelectric water heat pump, drinking water can be heated to the desired temperatures in an energy-saving manner. For this purpose, the energy is extracted from heating water with a low flow temperature, which has been heated by means of solar thermal energy, for example, and fed to the drinking water to be heated.

Thermoelectric exhaust-air heat pump

With the new heat exhaust pump, the heat of a ventilation system can be efficiently recovered by means of thermoelectric elements. The heated fresh air can also be heated via the temperature of the exhaust air. The exhaust air heat pump is also suitable for cooling buildings.

Self-Assembling Oxide Catalyst for Electrochemical Water Splitting

Electrocatalytic material for oxygen evolution reaction (OER) in alkaline solutions. The main purpose is to make the Hydrogen production more effective. The catalyst is based on perovskites with high activity (industry comparable once based on metals). In the same time (and in contrast to all other perovskite-based catalysts) it is stable at industrial conditions.

Smart grid expansion

Intelligent power grids can monitor and regulate themselves independently. A new process from the University of Wuppertal makes it possible to stabilize the voltage in grids by installing control units, as well as avoiding overloads.

Detecting ionizing radiation

Ionizing radiation is harmful to humans and the environment even in the smallest quantities. Therefore, radioactive materials must be continuously monitored in hospitals, mines or reprocessing plants. A novel semiconductor sensor can analyze ionizing radiation in an integrated microfluidic system (in-situ).

Effective hydrogen production

At the Ruhr University Bochum an effective method was developed with which the coating of an electrode can be achieved with high long-term stability, especially during electrolysis such as alkaline water splitting. Due to the coating of the electrode surface with catalytically active material, a significant reduction in the required cell voltage is achieved.

Oil float

Previous solutions or approaches to the elimination of oil spills on water surfaces consist either of actively working pumps, chemicals or materials that absorb the oil and then have to be cleaned or disposed of.

Method for current measurement in half-bridge topologies

A number of different instrument transformers are used to determine voltage and current in regulated power electronics. Current measurement becomes more and more difficult with increasing current intensity, especially since the switching frequencies increase due to the use of modern (e.g. GaN) transistors and parasitic properties of the sensors must be minimized.


The electrical power grid is undergoing a major transformation. Increasing numbers of decentralized feeders have been added in recent years and, in the future, there will be a large number of charging stations for electric vehicles that temporarily draw a large amount of electrical power from the power grid.