zuloomash.blogg.se - Pulse power

#Pulse power full#

Our UQ research team have been developing advanced ultrafast energy conversion systems which can be utilised in several industrial and Bioelectrics applications.

#Pulse power full#

Hence new pulsed power converters are needed for this application to reach its full potential as a safe efficient water decontamination treatment. Studies have indicated that the most important factor in the success of pulsed power water decontamination is the rise time of the pulse, which needs to be as low as nanoseconds. This process can be applied to contaminated water to kill bacteria. Specific trains of high voltage pulses can generate reversible or irreversible pores on the membrane, dependent on the electrical characteristics of the pulse and the target organism. It has been shown that cells have a capacitive-resistive model and if too much charge gathers at the cell membrane, the electric field breaks the membrane down, creating permeable pores. The effect of intense pulsed electric fields on biological cells has been the topic of research since the late 1950s. The high oxidizing properties of these reactive species make them potential candidates for facilitating the treatment processes. With the plasma discharges generated in the liquid phase, physical processes like EFs, shock waves, and UV highly contribute to the biocidal process in addition to chemical effects. Several reactive species like OH radicals, ozone, and hydrogen peroxide can be formed in gas-liquid phases in a treatment system when plasma discharges are applied. The non-thermal plasma is based on chemical and physical reactions and results in biologicals effects and production of some biocidal agents such as electric fields (EFs), reactive chemical species, ultraviolet radiation (UV), heat and shock waves. Two different types of plasma are usually generated, thermal and non-thermal plasma. When the generated pulses are applied to liquid and gas samples, plasma is produced.

Pulsed Power signal and average and peak power A circuit diagram of a pulsed power with a load Pulsed power phenomena Pulsed power parameters and shapes have big impacts on the quality and efficiency of applications.

switching of current (magnetic field) stored in an inductor.Īs shown below, although the peak power and energy of the generated pulses is very high, for example around a few GW, but the average power can be very low, in the range of watts.

switching of voltage (electric field) stored in a capacitor or.

There are two different types of energies that can create pulsed power signals such as When electrical energy is stored in a system over a long time and is released over a short time, a huge amount of peak power can be delivered to a load. Pulsed power technology refers to the generation of high voltage pulses with a narrow pulse width to deliver a huge amount of energy over a short period of time. The state-of-the-art facility at The University of Queensland will enable researchers to explore nanosecond pulsed power excitation in a variety of applications, including mining, food processing, and bioenergy.

preventing hot plasma in air or liquids.

higher voltage stress across the objects.

less temperature rise and power loss in the medium due to short pulses.

It is demonstrated that nanosecond pulsed power technology, can improve the efficiency of the systems due to Microsecond pulsed power excitation has been used in several applications where significant energy loss and high temperature have negatively affected the system performance thus, this old technique has not been commercialised in industrial or Bioelectrics applications due to these major technical issues. This technology is a multi-disciplinary research field which widely used in different applications and showed great potential in liquid decontamination, food processing, tailings dewatering and facilitating fruit and vegetable growth. The ability of pulsed power to deliver energy as pulsed electromagnetic waves, plasmas, shock waves, radicals and light, opens up new research challenges and unexplored opportunities for industrial and biomedical applications. Pulsed power is an exciting and emerging technology with a variety of industrial and Bioelectrics applications, such as water treatment.