In order to understand the recovery characteristics of AC contactors and improve their performance, experimental measurements were used to investigate the arcing gap recovery process including dielectric recovery strength and reignition, to a pair of splitter plate together and four kinds of arc chamber of AC contactors. A special circuit was designed to perform the work. It demonstrates that u...

Recently, condition monitoring methods using the sound of machine have attracted attention. Since approaching high voltage equipment increases risk electrocuting, non-contact data acquisition is desirable. Most research targets acoustic are rotating machines and it not clear whether effective for that switch between two states, such as contactors circuit breakers. In this work, several investig...

Total complaints related to voltage sags are about 80 % of all the complaints due to power quality transients. AC Contactors are designed to disconnect the load or circuit they control when the main power supply is intentionally interrupted. The sensitivity of AC coil contactors to the applied voltage is thus a potentially weak link in industrial processes. This paper shows the test results obt...

The disposal of domestic wastewater without any treatment into the drainage systems is considered a source of pollution threatening the population. Industrial waste water discharge to the environment is one of the environmental problems which must be controlled. Current mainstream technologies for treatment of domestic wastewater such as activated sludge and tertiary nutrient removal are too co...

in order to simulate the rotating disk contactor all hydrodynamic parameters, dispersed phase hold-up, characteristic velocity, mean drop size, drop size distribution, axial mixing and mass transfer have been taken into account. mechanisms of mass transfer (stagnant, circulating, oscillating drops) were used in this study. column height found from effect of mean drop size and drop size distribu...

Soilless tomato cultivation wastewater, with typically low COD, high concentrations of phosphorus, and oxidized forms nitrogen, may be effectively treated in a rotating electrochemical disk contactor (RECDC) bioelectrochemical reactor (BER), such as electrobiological (REBDC). The aim this study was to determine the technological parameters both reactors, i.e., electric current density (J) hydra...

the removal performance of total poly phenols and orthodiphenols (o-diphenols) content in olive mill waste (omw) was investigated with a three stages cross flow laboratory scale rotating biological contactor (rbc) in the present study. due to high cod and other pollutant in the original omw, physico-chemical treatment was effected for cod and other pollutant reduction prior to biological treatm...

Due to its non-dispersive contact, definite interface and high specific volume, a membrane contactor offers many advantages over conventional contactors. In recent years it has been established as a potential replacement for packed absorber columns in the field of CO2 capture. There are many different configurations in which a membrane contactor can operate, while tubular membrane with liquid i...