Number of the records: 1
Multi-hollow surface dielectric barrier discharge: an ozone generator with flexible performance and supreme efficiency
- 1.
SYSNO ASEP 0535367 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Multi-hollow surface dielectric barrier discharge: an ozone generator with flexible performance and supreme efficiency Author(s) Homola, Tomáš (UFP-V) ORCID
Prukner, Václav (UFP-V) RID, ORCID
Hoffer, Petr (UFP-V) RID
Šimek, Milan (UFP-V) RID, ORCIDNumber of authors 4 Article number 095014 Source Title Plasma Sources Science & Technology. - : Institute of Physics Publishing - ISSN 0963-0252
Roč. 29, č. 9 (2020)Number of pages 15 s. Language eng - English Country GB - United Kingdom Keywords 1st positive system ; temperature-dependence ; numerical-simulation ; energy-conversion ; plasma treatment ; oxygen ; n-2 ; emission ; nematode ; dielectric barrier discharge ; ozone ; production yield ; multi-hollow surface DBD ; msdbd Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects GA15-04023S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000575395600001 EID SCOPUS 85092302932 DOI 10.1088/1361-6595/aba987 Annotation This contribution investigates the effects of duty cycle and mass flow of synthetic air and oxygen on the efficiency of ozone generation in multi-hollow surface dielectric barrier discharge (MSDBD). It discloses that the efficiency of ozone generation in MSDBD is significantly higher compared with standard coplanar DBD, surface DBD and volume DBDs. Ozone production yield reached 205.5 +/- 29.1 g (kW h)(-1)(40% duty cycle, 8 slm) and 413.91 +/- 58.7 g (kW h)(-1)(100% duty cycle, 8 slm) at an energy cost of 8.7 and 4.3 eV/molecule for synthetic air and oxygen, respectively. Such high ozone yields arose out of the intrinsic characteristics of MSDBD ceramics, which were efficiently cooled by the flow of the working gas. The amplitude modulation of low-frequency 5 kHz high-voltage sine waveforms facilitates controlled O(3)production at a nearly constant rate of yield. Since the correct evaluation of ozone production yield requires precise determination of the discharge power, the concentration of ozone and working gas-flow, considerable attention was paid to measurements of these parameters. It is confirmed and experimentally demonstrated herein that correct determination of discharge power lies with Lissajous figure methods, while the determination of power through the direct integration of productu(t)i(t), wherei(t) is measured by Pearson current probe, leads to systematically lower values of calculated power with consequent overestimation of the ozone production yield. The correct determination of discharge power is clearly the key to the proper calculation of ozone production yield and efficiency. Under the DBD discharge conditions presented herein, ozone production yield and efficiency achieved figures as high as 19.5% and 35.2% of theoretical limits recently established for air and oxygen, respectively. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2021 Electronic address https://iopscience.iop.org/article/10.1088/1361-6595/aba987
Number of the records: 1