Wyniki wyszukiwania dla: BLOW UP THRESHCHOLD

• Low cost set-up for supercapacitors parameters evaluation

  Publikacja

  • A. Szewczyk

  - Rok 2018

  We propose a use of a power amplifier in the circuit of voltage to current converter (current driver) for supercapacitor charging/discharging in controlled conditions. The current driver is controlled by DAC output of DAQ board and voltage of DUT is measured and a control loop is realized by software. In the circuit the DC current method of evaluation of capacitance and equivalent series...

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• Low cost set-up for supercapacitors parameters evaluation

  Publikacja

  • A. Szewczyk

  - Journal of Physics : Conference Series - Rok 2018

  Supercapacitors are capable to store relatively high amount of energy comparing to its mass. Growing number of these devices applications requires development of new testing methods. Standard methods of evaluation of supercapacitor parameters, as cycling voltammetry, CV, galvanostatic cycling with potential limitation, GCPL, impedance measurements, require equipment of high cost...

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• Smart Graphite–Cement Composites with Low Percolation Threshold

  Publikacja

  • M. Frąc
  • P. Szołdra
  • W. Pichór

  - Materials - Rok 2022

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• Influence of the low ambient temperature on the start-up process of hydraulic pumps

  Publikacja

  • R. Jasiński

  - Rok 2019

  Starting hydraulic pumps in low ambient temperatures may cause: decreased hydraulic-mechanical efficiency, larger vibration of hydraulic installation, faster wear and more frequent damage to the elements of pumps, change of material properties of elements, increase of pressure drop. As a result of pressure drop in the suction pipe, large underpressure may be experienced, causing incomplete filling of pump working chambers with...

• RESEARCH OF HYDRAULIC PISTON PUMPS’ START-UP IN LOW AMBIENT TEMPERATURES

  Publikacja

  • R. Jasiński

  - Rok 2017

  Starting hydraulic pumps in low ambient temperatures may cause: decreased hydraulic-mechanical efficiency, larger vibration of hydraulic installation, faster wear and more frequent damage to the elements of pumps, change of material properties of elements, increase of pressure drop. As a result of increase of resistance of cold oil flow in the suction pipe, large underpressure may be experienced, causing incomplete filling of pump...

• Low-threshold lasing eigenmodes of an infinite periodic chain of quantum wires

  Publikacja

  • V. Byelobrov
  • J. Ctyroky
  • T. Benson
  • R. Sauleau
  • A. Altintas
  • A. Nosich

  - OPTICS LETTERS - Rok 2010

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• Mitigation of the Flow Maldistribution in Minichannel and Minigap Heat Exchangers by Introducing Threshold in the Manifolds

  Publikacja

  • P. Dąbrowski

  - Journal of Applied Fluid Mechanics - Rok 2020

  In the present paper, a detailed numerical investigation has been carried out to analyze the flow maldistribution in 50 parallel rectangular cross-section (1 mm depth and 1 mm width) minichannels and minigap section (1 mm depth and 99 mm width) with rectangular/trapezoidal manifolds in Z-type flow configuration. The author carried out numerical investigation with various mass flowrates, namely 0.05 kg/s, 0.1 kg/s and 0.2 kg/s which...

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• Modular Approach for Modelling Warming Up Process in Water Installations with Flow-Regulating Elements

  Publikacja

  • J. Kropiwnicki
  • M. Furmanek
  • A. Rogala

  - ENERGIES - Rok 2021

  The paper presents a new method for modelling the warming up process of a water system with elements regulating the flow in a stochastic manner. The paper presents the basic equations describing the work of typical elements which the water installation is composed of. In the proposed method, a new computational algorithm was used in the form of an iterative procedure enabling the use of boundary conditions that can be stochastically...

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• Volumetric and torque efficiency of pumps during start-up in low ambient temperatures

  Publikacja

  • R. Jasiński

  - Rok 2021

  The volumetric, torque and total efficiency of hydraulic pumps change during start-up in low ambient temperatures, as well as in thermal shock conditions, un-til they reach the set conditions. The time to reach steady-state conditions de-pends on many parameters: ambient temperature, flow rate, fluid temperature, design of hydraulic units. The author carried out tests of hydraulic pumps in the Hydraulics Laboratory of the Faculty...

• On delamination threshold loads in low velocity impact on glass-carbon/epoxy composites.

  Publikacja

  • K. Imielińska
  • R. Wojtyra
  • M. Kozłowski

  - Rok 2005

  Zbadano możliwości zastąpienia badań udarowych o niskiej energii ze spadającą masą badaniami quasi-statycznymi przy analogicznym obciążeniu próbki dla laminatów epoksydowych wzmocnionych włóknami węglowymi i szklanymi oraz węglowymi. Uzyskano dobrą zgodność wyników obu typów badań , co znajduje potwierdzenie w wynikach innych badaczy.