Artur Berendt

Comparison of airflow patterns produced by DBD actuators with smooth or saw-like discharge electrode

In this paper we compare the performance of DBD actuators when either a smooth or saw-like electrode is employed. Two electrode arrangements of DBD actuators are investigated. The first is the classic DBD actuator and the second is a DBD actuator with floating electrode. The usefulness of the saw-like electrode in these two types of DBD actuators is studied.

Recent progress in experimental studies of electro-hydrodynamic flow in electrostatic precipitators

Many experimental, theoretical and numerical works were devoted to the electrohydrodynamic (EHD) flow generated in electrostatic precipitators (EPSs). The generally accepted conclusion from these studies is that the EHD flow plays an important role in the particle collection in ESPs. However, despite of the recent fast progress in numerical simulation and experimental techniques used in the ESPs studies many problems related to the influence of the EHD flow on the performance of ESPs are unsolved. In particular, the influence of the turbulent EHD on submicron particles transport and deposition in ESPs is ambiguous. This problem and other related to the particle collection in ESPs are objectives of this paper, basing on the recent progress in experimental investigations of the EHD flow in ESPs.

Pumping Effect Measured by PIV Method in a Multilayer Spike Electrode EHD Device for Air Cleaning

Dust particles can be harmful for human health when inhaled. Particularly dangerous are submicrometer dust particles, which can contain traces of toxic elements and can easily penetrate into the human respiratory system. Thus, efficient devices for the air cleaning from submicrometer dust particles are needed. Recently, Katatani and Mizuno have proposed an electrohydrodynamic (EHD) device for air cleaning for submicrometer particles. In this paper, we present the flow velocity field patterns in an EHD device for air cleaning, which is similar to that of Katatani and Mizuno. The presented EHD device had a set of the stressed plate electrodes with spike tips and the grounded electrodes also in the form of plates. The parametric studies of the flow velocity patterns in such an EHD device using particle image velocimetry were made by us for a different electrode arrangement.

Biomethane reforming in DBD nonequilibrium plasma

Summary form only given. There are several publications claiming to describe production of hydrogen from biogas using plasma-catalyst systems1. However, the authors has used a mixture of methane with carbon dioxide simulating a biogas but without any additives which are present in real biogas such as water vapour, H 2 S and NH 3 . Such a simple simulation of biogas is not appropriate when the outlet gas is going to be used with fuel cells, which are very sensitive to H 2 S traces. There are only 2 papers on using real biogas and they were published by one research group in 2008 and 2010. Sekine et al.2,3 studied application of pulsed corona discharge (PCD) reactor and dielectric barrier discharge (DBD) reactor without any catalyst and they found that PCD could convert biomethane into syngas and H 2 S into solid sulfur simultaneously. This is due to the high electron energy of PCD and the electron has enough energy to dissociate C-C bond and C-S bond. On the other hand, DBD could convert H 2 S into solid sulfur too, but methane and CO 2 in the biogas were not reacted at lower input power. The investigation by Sekine et al. showed that proper choice of electrical discharge can brings elective reaction for dry reforming of biomethane and desulfurization, and this is due to the correlation between the bond dissociation energy of each molecule and electron energy level of each discharge. Our proposal is to verify this conclusion by parametrical studies of biomethane reforming using DBD and real biogas or a mixture simulating biogas with its trace components (influence of voltage pulses shape, duration and frequency, influence of reactor geometry).