Nowadays, high-performance electronic devices release large amounts of heat throughout their operation. Thermoelectric passive cooling systems can offer a cost-efficient and straightforward solution for the thermal management such based on heatsink thermoelectric generator (TEG). TEG transform part generated by chip into electricity power supply microelectronic systems. The system investigated here contains 12 W Positive Temperature Coefficient (PTC) heating element placed 4 × cm2 aluminium...

Platinum group metals, such as Pd and Pt, found in three-way catalyst converters were recycled a two-step method: hydrodynamic cavitation followed by sonoelectrochemical dissolution. High shear forces obtained using convergent nozzle with throat diameter of 0.2 mm, feeded plunger pump at pressure 60 MPa. Cavitating submerged jets acted locally on the water dispersed waste catalyst. As-obtained samples analyzed scanning electron microscopy transmission microscopy. Electron initial sample...

Extracting clean fetal electrocardiogram (fECG) signals from non-invasive abdominal ECG recordings for monitoring the health of fetus during pregnancy and labor remains a big challenge. The proposed system facing extraction, processing morphological feature estimation was implemented in LabVIEW 2013 with preinstalled Biosignal Filtering, Advanced Signal Processing Digital Filter Design Toolboxes. present approach is based on using FastICA algorithm fECG extraction. In order to improve...

The efficient recovery of the waste heat from industrial sector can represent an essential step in global energy saving, with proper usage other on-grid power resources available for specific high-energy consumers.A simple, low-cost conversion system was tested here to recover a part dissipated by gasoline engine's exhaust pipe under car's stationary testing mode at temperatures around 80-100 °C.The main components this were copper-made thermal collector, commercial thermoelectric generator...

In this paper we proposed to implement a simple empirical model based on well-established mathematical correlations of the output voltage for Proton Exchange Membrane Fuel Cell (PEMFC) system with current, temperature, partial reactant pressure and membrane conductivity in order validate two experimental polarization curves, registered at different anode cathode backpressures also evaluate individually type cell losses form activation, ohmic concentration overpotentials. Thermodynamic...

Membrane electrode assembly (MEA) formed by a proton exchange membrane (PEM), two catalyst layers and gas diffusion represent the heart of PEM fuel cell system, being place where electrochemical reactions are developed in order to generate electrical power. Due complex water production transportation process through porous media MEA, management represents one most critical issues for low temperature systems, working at 30 °C–80 °C. In present paper, one-dimensional mass transport PEMFC model...

Mechanical displacement and thermal stress investigation of a two hot arm microactuator (polysilicon type) with different structural geometrical parameters was investigated in this paper Comsol Multiphysics software, starting from validation model based on the real dimensions microactuator, experimentally tested at actuation voltages. Variation voltages (between 1 9 V) for radiative energy received by cold short ratio between resistive heat widths dw gap arms g = 2 µm, respectively 15 µm...

Along the pregnancy, fetal heart rate (FHR) can be monitored noninvasively using Doppler ultrasound. Unfortunately, this technique is inaccurate and provides a relatively low positive predictive value. Performing electrocardiogram (FECG) waveform analysis it obtained useful information about physiological state of fetus. FECG extracted from abdominal (aECG) recordings by means multiple electrodes placed on abdomen mother. The main research goal present paper to extract fECG signals...

The concerns about the availability of energy resources, climate change, air quality, and security suggest important role that nuclear power has in future supply. While current Generation II III types plants provide an economically acceptable source electricity for many markets, advances design IV systems may expand opportunities use energy. Research-Development-Innovation activity carried out by RATEN ICN regarding is focused, through several research directions, on development ALFRED...

A double element 900 bent monopole antenna system with mushroom-like electromagnetic band-gap (EBG) structures introduced between elements has been studied in this paper using a Finite Element Method (FEM) order to demonstrate the concept of EBG mutual decoupling. The were designed have band gap centered around bandstop frequency 2.45 GHz. coupling coefficient s21 was simulated over range frequencies for some specific designs and electric field distribution on XY plane optimal design also...

A proton exchange membrane (PEM) fuel cell has many distinctive features, like quick start-up, high power density, zero emissions and system robustness, which makes it an attractive alternative clean energy source. Comsol Multiphysics, a commercial solver based on the Finite Element Method (FEM) was used here for developing two dimensional cross-the-channel (CTC) through-the-membrane (TTM) model of low temperature Proton Exchange Membrane Fuel (LT-PEMFC), agglomerate cathode catalyst layer....

The Micro-Electro-Mechanical System (MEMS) based heat exchangers had become popular recently in many practical applications. For example, MEMS can be used as a cooling system for micro-chips squeezed into smaller and spaces, with very little place to escape. Therefore, the improvement of their transfer characteristics is key issue development micro-scale integrated systems. In this paper, it was implemented basic unit model micro-heat exchanger using commercial Finite Element Method (FEM)...

A proton exchange membrane (PEM) fuel cell has many distinctive features, like quick start-up, high power density, zero emissions and system robustness, which makes it an attractive alternative clean energy source. Comsol Multiphysics, a commercial solver based on the Finite Element Method (FEM) was used here for developing two dimensional cross-thechannel (CTC) through-the-membrane (TTM) model of low temperature Proton Exchange Membrane Fuel (LTPEMFC), agglomerate cathode catalyst layer....