Blog

Hannah Horn
24. May. 2018 (08:52) 
Attendance as a part of an communial booth of ClustAir Baden-Wuerttemberg

Palas® was present at the IFAT 2018, the world’s leading trade fair for water, sewage, waste and raw materials management, as part of an communial booth of ClustAir Baden-Wuerttemberg , from May 4-8, in Munich.

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Displayed was the mobile, battery powered aerosol spectrometer Fidas® Frog as well as the certified fine dust monitor system Fidas® 200 for regulatory fine dust measurements.

ClustAir is a synergy alliance of providers of exhaust air purification solutions, e. g. Keller Lufttechnik GmbH, Junker-Filter GmbH and Lechler GmbH, etc.
Palas® was represented by Dipl.-Ing. (FH) Sven Schütz (Sales & Applications Engineer).
Hannah Horn
27. Apr. 2018 (09:52) 
Looking back on an exciting fair
In cooperation with our long-term business partner CH Technologies, we took part at this years AFS FiltCon Spring Meeting (April 23 - 25, 2018) at Mystic Lake Conference Center in Prior Lake, Minnesota (USA).
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On-site, CH Technologies was represented by Dan Bachman and Palas® by Martin Schmidt. Mr Schmidt also held a presentation about the Influence of temperature and humidity to filter efficiency and dust holding capacity.

We would like to thank everyone who visited our booth. We are looking forward to the next AFS FiltCon!
M.A. Linda Münnig
17. Apr. 2018 (07:50) 
Cooperation in the field of filter testing in accordance to ISO 11057

Palas® GmbH and FilTEq GmbH from Karlsruhe agreed on a strong cooperation in the field of filter testing in accordance to ISO 11057. From now on, the two suppliers of filter test rigs cooperate intensively in the sector of testing cleanable filter media.

SAM_0341_bearbeitet.jpg With the test rig MMTC 2000 for cleanable filter media according to VDI 3926, Palas® offers the testing technology for fast quality control. With the reference system according to ISO 11057, FilTEq has developed a worldwide recognized system for testing in accordance to this guideline. According to the customers’ demands, FilTEq and Palas®, two well-known suppliers of filter test rigs, therefore can serve the entire spectrum. First, the cooperation starts in the field of Marketing and Sales and shall be expanded to Service and Maintenance and the building of test rigs, later.

The worldwide market leadership of both cooperation partners in this field will further be strengthened by this cooperation and the perfect testing method for cleanable filter media will be offered to the user from just a single source.

Contact FilTEq GmbH or Palas ® GmbH today!

Leander Mölter (managing director of Palas® GmbH) and Dr Peter Gäng (managing director of FilTEq GmbH)
Photo: Palas® GmbH
The availability of compact generators with superconducting rotor windings is an essential prerequisite for future realization of cost-effective wind turbines.

Logo DIAMANT.jpg Excessively high costs of the available technical high temperature superconductors have so far prevented the product launch for this application. To be in a position to produce the considerable quantities of superconductors affordably, the novel Aerosol Deposition Method (ADM, also known as aerosol-based cold deposition) is applied in the DIAMANT project to the extremely promising high temperature superconductor material magnesium diboride (MgB2). The project is promoted by the German Federal Ministry for Education and Research (BMBF).

In the ADM method, the starting powder is dispersed as a particle aerosol and is spread over the substrate material under high low-pressure using a nozzle. Due to the high kinetic energy of the particles at the impact, they densify in-situ at room temperature to form layers. This allows the deposition of several tens of µm thick superconducting layers with high density and homogeneity.

In the joint project, Palas®, together with the project partners of the Karlsruhe Institute for Technology (KIT), Siemens AG and the University of Bayreuth, conducts basic research on the layer deposition process. The newly developed aerosol generators - RBG 1000 SD and RBG 2000 SD - allow the researchers for the first time adjustable, reproducible and constant dispersion of various starting powder also at low pressures down to 300 mbar.

Due to the oxygen-sensitive starting powder the researchers value, the high vacuum sealing and the flexible operation of the RBG generators with inert carrier gases such as nitrogen, helium or forming gas. By integrating a welas® digital 2000 aerosol spectrometer from Palas® in the overall ADM system, the particle size distribution of the dispersed aerosol was determined in-situ during the process, immediately upstream of the deposition nozzle at negative pressures down to 300 mbar. The scientists were therefore able to understand the influence of the various operating modes of the RBG on the particle size distribution and the number concentration. This allows important conclusions to be drawn about the layer and superconductor properties.

After completion of the project, the new insights will be presented, e.g. at the upcoming Aerosol Technology Conference 2018 in Bilbao. Further publications in scientific journals are also planned.

» Further information on the DIAMANT project on the KIT website

As they are uncomplicated, they are already widely used.

The determination of filter efficiency and fraction separation efficiencies for size ranges < 300 nm is performed, among other means, by using electrical mobility classifiers (e.g. DEMC 2000) to provide particles of different sizes.

This involves applying a charge to the aerosol for functional reasons. As improved deposition on the filter can be attained with a charged aerosol than with an uncharged aerosol, the EN 1822 standard favors neutralizing the aerosol upstream of the filter.
Radioactive emitters, such as krypton 85, are established in practice for this purpose. The use of these emitters entails a good deal of bureaucracy and special safety measures are necessary. A handling permit has to be applied for and a radiation protection officer has to be nominated. Special training is also required, safe storage of the emitter has to be ensured, and more besides.

The Palas® engineer Mara Pfeffinger therefore investigated whether in filter testing with the MFP Nano plus test rig, instead of using a radioactive emitter, an X-ray emitter can also be used for neutralization of the aerosol. As they are uncomplicated, they are already widely used. It should also be investigated whether an X-ray emitter achieves the same performance in determining the filter efficiency and MPPS (most penetrating particle size) in the nanometer range as a radioactive emitter.

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Figure: Palas® investigation on neutralization of aerosols in filter testing with a radioactive emitter and a X-ray source

Mrs. Pfeffinger made measurements with the MFP Nano plus test rig with different filter media, both with the krypton emitter Kr-85-370, as well as with the X-ray emitter XRC 049 from Palas®. The result of the measurement series was that only very minor differences were to be ascertained between the two emitters. These were within the variability of the filter medium. “Further measurements need to be made with different filter media and settings to be absolutely sure, but to a first approximation it can be said that an X-ray emitter can also be used to neutralize the aerosol”, Mara Pfeffinger takes initial stock of her investigations.

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