National Repository of Grey Literature 189 records found  beginprevious161 - 170nextend  jump to record: Search took 0.00 seconds. 
Particles in Steam Turbines
Kolovratník, M. ; Hrubý, Jan ; Ždímal, Vladimír
The aim of this paper is to show new measurement results for particles structure occurring in superheated steam in steam turbines. The measurement was carried out by sampling device developed in cooperation of CTU and AS CR.
Investigations on Size Structure of Steam Impurities in Turbines
Kolovratník, M. ; Jiříček, I. ; Hrubý, Jan ; Ždímal, Vladimír
Paper presents new measurement results for impurities structure occurring in superheated steam in turbines. Measurements were carried out by sampling device developed in cooperation of CTU and AS CR.
Heterogenní částice v parních turbínách: měření na elektrárně Prunéřov II a další voj měřicích metod
Hrubý, Jan ; Kolovratník, M. ; Ždímal, Vladimír ; Jiříček, I. ; Bartoš, O. ; Moravec, P.
The form in which various impurities and admixtures are transported in steam circuits of power plants is a missing piece of knowledge needed to fully understand the processes of liquid phase formation in the low-pressure stages of steam turbines and, consequently, to model these processes and suggest modifications of turbine operation and design. The existence of heterogeneous particles in the superheated steam has been proven by the present team using an original sampling device, enabling using standard aerosol instrumentation to characterize the heterogeneous particles in superheated steam. We report measurements at power plant Prunéřov II, where 5.6E9 particles per kilogram of dry steam was found. The Sauter diameter of the particles d32=30nm was determined. The mass balance indicates, that substantial part of the mass of impurities is contained in particles <3nm, the current detection limit. For this reason an expansion chamber is being developed with a goal of detecting particles down to 1nm.
Number and Mass Size Distribution Measurement Next to Traffic Source (Jizni spojka)
Schwarz, Jaroslav ; Ždímal, Vladimír ; Matějková, Daniela ; Ondráček, Jakub ; Džumbová, Lucie ; Havránek, Vladimír ; Smolík, Jiří ; Bízek, V.
Number and mass size distribution pilot measurement was done next to large traffic source. Chemical analysis of impactor samples was done.
Selected Results of the Continuous Measurement of Atmospheric Aerosols in Prague – Suchdol
Matějková, Daniela ; Ždímal, Vladimír ; Smolík, Jiří ; Šilhavý, J.
Continuous measurement of atmospheric aerosols leads to information about dynamics of particle size distribution with high time and size resolution. It is possible estimate of new particle formation mechanisms and to specify dependencies with the meteorology and other parameters. Long-term measurements provide many data, which has to be organized and evaluated. Due to the semi-automatic tools are develop.
The Behavior of Monodisperse Aerosol Particles in a House - Experimental Study
Ondráček, Jakub ; Ondráčková, Lucie ; Ždímal, Vladimír ; Šťávová, P. ; Barták, M. ; Smolík, Jiří
The behavior of monodisperse aerosol particles in a House is subject to discuss in this contribution.
New HTDMA System for Long Time Measurements of Hygroscopic Properties of Atmospheric Aerosol
Ondráček, Jakub ; Dohányosová, Pavla ; Ždímal, Vladimír ; Schwarz, Jaroslav ; Krejčí, A. Petr ; Smolík, Jiří
HTDMA system allows measurements of hygroscopic properties of aerosol particles in submicrometer size range. The instrument is suitable for laboratory measurements as well as for long time measurements of atmospheric aerosol. Worldwide, all of the HTDMA systems are unique instruments developed in individual laboratories. As far as the authors are informed, the HTDMA system presented in the paper is the first and the only one in the Czech Republic.
Experimental Study of Aerosol Penetration Efficiency through Denuder
Ondráčková, Lucie ; Ždímal, Vladimír ; Schwarz, Jaroslav ; Smolík, Jiří ; Putaud, J.P.
This article deals with experimental study of aerosol penetration efficiency through denuder.

National Repository of Grey Literature : 189 records found   beginprevious161 - 170nextend  jump to record:
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11 Ždímal, Vladimír
1 Ždímal, Václav
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