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Am 1. Februar ist das europäische Metrologienetzwerk (EMN) für „Clean Energy“ gegründet worden. Unter dem Dach von EURAMET arbeiten hier Metrologie-Organisationen aus ganz Europa auf dem Gebiet der Messtechnik rund um die Erzeugung und Speicherung von Energie aus Wind und Sonne zusammen. Im Zuge des Green Deal der EU-Kommission müssen die Treibhausgasemissionen bis 2030 um mindestens 55 % reduziert werden. Das erfordert den massiven Ausbau der erneuerbaren Energien. Die Messtechnik spielt dabei eine wichtige Rolle. (Ansprechpartner: Fabian Plag, 0531 592-2006, Opens local program for sending emailfabian.plag(at)ptb.de)

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The European Metrology Network (EMN) for Clean Energy was founded on 1 February 2024. Under the umbrella of EURAMET, metrology organizations from all over Europe are working together in the field of metrology related to producing and storing wind and solar energy. As a part of the EU Commission’s “Green Deal”, greenhouse gas emissions must be reduced by 55 % by the year 2030. This requires massive development of renewable energies. Metrology plays an important role here.

Contact: Fabian Plag,
+49 531 592-2006,
Opens local program for sending emailfabian.plag(at)ptb.de

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Wenn Wind und Sonne mehr Energie erzeugen, als gebraucht wird, kann diese mithilfe von grünem Wasserstoff gespeichert und transportiert werden. Wasserstoff wird in hoher Konzentration durch Gasleitungen fließen und an Zapfsäulen verfügbar sein. Doch wie lässt sich die Qualität des Wasserstoffs feststellen? Wie kann zu jeder Zeit Explosionsschutz garantiert werden? Eignet sich die bisherige Messtechnik, um den Brennwert zu bestimmen und gerecht abzurechnen? In ihrer Wasserstoffstrategie präsentiert die PTB Lösungen zu zahlreichen messtechnischen Fragen. (Ansprechpartner: Fabian Plag, 0531 592-2006, Opens local program for sending emailfabian.plag(at)ptb.de)

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When wind and solar power produce more energy than can be consumed, green hydrogen can be used to store and transport it. Highly concentrated hydrogen can be pumped through gas lines and be made available at fuel dispensers. But how can the quality of the hydrogen be determined? How can explosion protection be ensured at all times? Are the measurement techniques that have been used up to now suited to determining the calorific value and to charging fees correctly? PTB presents measures and solutions to numerous metrological questions in its hydrogen strategy.

Contact: Fabian Plag,
+49 531 592-2006,
Opens local program for sending emailfabian.plag(at)ptb.de

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Design of the flip-chip encapsulation of a graphene-based electric quantum resistance standard

Graphene in monolayers is the object of intensive research for applications in novel electronic circuits. For example, graphene-based quantum resistance standards are to be used for tracing electric resistance to constants of nature using the quantum Hall effect in the future. By means of flip-chip technology, the graphene-based quantum resistance standards manufactured at PTB can be sealed to maintain constant properties even in changing environments and over long periods of time. In addition, a small and well-defined distance between the quantum resistor and the electrode can be realized, which may offer significant advantages when operating at alternating current compared to previously applied contacting methods. (Technology Offer 560)

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Diagrammatic sketch of the ion trap chip with photonically integrated circuit

Scalability is a key requirement for the further development of quantum computers based on trapped ions: An ever-increasing number of qubits have to interact with each other. An important step in this direction is the integration of photonic components into the trap chip. It is also to be expected that stabilizing the frequency right down to the atom/ion will become increasingly important. The new PTB technology is based on integrated optics and implements the concept of optical path length stabilization of the laser light over the entire length between the laser and the chip. Thus, the highest-quality signal can be sent from the laser to the chip with virtually no interference. (Technology Offer 559)

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Sketch of the miniature AFM on a chip

Atomic force microscopes (AFMs) are frequently used for measuring complex nanostructures. Conventional AFMs are expensive, slow and large. PTB’s innovative concept, however, envisages a miniature AFM in the form of a MEMS chip (MEMS stands for micro-electromechanical system) with a side length of less than 20 mm. Such miniature AFMs can be used flexibly and they perform specific measurement tasks, for example, in undercut or nanoscale structures. (Technology Offer 512)

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Locations of the 69 standard reference photometers worldwide (image:
NIST)

Ozone is toxic to organisms and is a harmful greenhouse gas. For this reason, the ozone concentration has to be closely monitored using reliable measurement procedures. PTB and the UBA have been collaborating for 20 years to ensure the quality assurance of ozone measurements.

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Principle of the MELANI system’s operation

The testing phase for a system which jointly manages electricity from renewable sources in multi-dwelling units has now started. This new approach is intended to make better use of the ecological and economic potential of solar energy production and storage systems.

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Cool White

The principle of passive radiative cooling: Solar radiation can be very effectively reflected and, at the same time, heat can be dissipated through the infrared transparency windows of the Earth’s atmosphere.

In a development cooperation project in Rwanda, a significant cooling effect of roofs with white coating was proven. This has a positive effect on people’s health while also reducing the energy consumption for cooling.

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