Number of the records: 1
Energetic balance in an ultrasonic reactor using focused or flat high frequency transducers
- 1.
SYSNO ASEP 0092919 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Energetic balance in an ultrasonic reactor using focused or flat high frequency transducers Title Energetické balancování v ultrazvukovém rektoru pomocí vysokofrekvenčních transducerů Author(s) Hallez, L. (FR)
Touyeraz, F. (FR)
Hihn, J. Y. (FR)
Klíma, Jiří (UFCH-W) RIDSource Title Ultrasonics Sonochemistry. - : Elsevier - ISSN 1350-4177
Roč. 14, č. 6 (2007), s. 739-749Number of pages 10 s. Language eng - English Country GB - United Kingdom Keywords sonochemistry ; polymer film irradiation ; calorimetry ; HIFU Subject RIV CG - Electrochemistry R&D Projects 1P05OC074 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z40400503 - UFCH-W (2005-2011) Annotation In order to undertake irradiation of polymer blocks or films by ultrasound, this paper deals with the measurements of ultrasonic power and its distribution within the cell by several methods. The electric power measured at the transducer input is compared to the ultrasonic power input to the cell evaluated by calorimetry and radiation force measurement for different generator settings. Results obtained in the specific case of new transducer types (composites and focused composites i.e. HIFU: High Intensity Focused Ultrasound) provide an opportunity to conduct a discussion about measurement methods. It has thus been confirmed that these measurement techniques can be applied to HIFU transducers. For all cases, results underlined the fact that measurement of radiation pressure for power evaluation is more adapted to low powers (< 15W) and that measurement by calorimetry is a valid technique for global energy measurements. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2008
Number of the records: 1