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Badanie efektywności kurtyn wodnych przy niekontrolowanym uwolnieniu par acetonu

Węsierski T.

Przemysł Chemiczny

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2017

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T. 96, nr 7

1539--1542

PL

Zaprezentowano wyniki badań dotyczących skuteczności kurtyn wodnych przy zwalczaniu par acetonu w powietrzu. Oznaczona efektywność kurtyn wodnych dla acetonu była o rząd wielkości mniejsza niż dla amoniaku. Szybkość pochłaniania par acetonu była zbliżona do szybkości pochłaniania wyznaczonej dla metanolu i znacznie wyższa niż dla etanolu, propan-1-olu oraz butan-1-olu. Otrzymane wyniki pokazały użyteczność kurtyn wodnych w zdarzeniach obejmujących niekontrolowane uwolnienie się acetonu.

EN

Me₂CO vapors were removed from a test chamber by using H₂O curtain at 275-308 K, water flow 25-57 L/h and initial Me₂CO concns. 608-2012 ppm. The half-life redn. time of Me₂CO concn. decreased with an increasing H₂O flow. For constant H₂O flow, it decreased with an increasing the initial concn. of Me₂CO.

2

Investigation on nonlinear optical and dielectric properties of L-arginine doped ZTC crystal to explore photonic device applications

Anis M., Hussaini S. S., Shirsat M. D., Muley G. G.

Materials Science Poland

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2016

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Vol. 34, No. 3

548--554

EN

The present study is focused to explore the photonic device applications of L-arginine doped ZTC (LA-ZTC) crystals using nonlinear optical (NLO) and dielectric studies. The LA-ZTC crystals have been grown by slow evaporation solution technique. The chemical composition and surface of LA-ZTC crystal have been analyzed by means of energy dispersive spectroscopy (EDS) and surface scanning electron microscopy (SEM) techniques. The Vicker’s microhardness study has been carried out to determine the hardness, work hardening index, yield strength and elastic stiffness of LA-ZTC crystal. The enhanced SHG efficiency of LA-ZTC crystal has been ascertained using the Kurtz-Perry powder SHG test. The closed-and-open aperture Z-scan technique has been employed to confirm the third order nonlinear optical nature of LA-ZTC crystal. The Z-scan transmittance data has been utilized to calculate the superior cubic susceptibility, nonlinear refractive index, nonlinear absorption coefficient and figure of merit of LA-ZTC crystal. The behavior of dielectric constant and dielectric loss of LA-ZTC crystal at different temperatures has been investigated using the dielectric analysis.

3

A new approach to using the classic pressure-time method of discharge measurements

Adamkowski A., Janicki W.

Transactions of the Institute of Fluid-Flow Machinery

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2011

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nr 123

57-70

EN

Discharge measurement using the pressure-time (Gibson) method typically involves mounting measurement instrumentation on the outside of the penstock. In the case of a hydropower plant where the penstock is built over concrete, an innovative approach is necessary in order to install instrumentation inside the penstock. Such instrumentation has been implemented for the purpose of efficiency tests of the upgraded small Kaplan turbine. The pressure-time method, in its classic version, requires sending pressure signals from both penstock cross-sections to the differential pressure transducer by means of connecting tubes. This raises the question on the influence exerted by dynamic properties of the connecting pipes/transducer system on the discharge measurement results. Calculations carried out using previously developed method enable authors to demenstrate that the connecting pipes/transducer system had exerted a negligible influence on the discharge measurement results.