Wyniki wyszukiwania - BazTech

1

Przepływomierz cieplnoprzewodnościowy

Detka A., Kirczuk C., Wiśniewski K.

Prace Naukowe Politechniki Warszawskiej. Elektronika

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2005

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z. 153

157-160

EN

A thick layer gas sensor, fabricated in the Faculty of Microsystem Electronics and Photonics at Wrocław University of Technology has been used in the construction of a heat conductivity flowmeter. It was found, that about 60 % of the energy is dissipated from the heated sensor by heat conductivity of a surrounding gas at the atmospheric pressure. Two methods of the heater supply conditions have been studied: U=constant and T=constant. Measuring range of the designed heat coductivity flow-meter was 10(-2) W +20W.

2

Wykorzystanie elektronów wstecznie rozproszonych w mikroskopie elektronowym do analizy składu atomowego spoin wykonanych za pomocą wiązki elektronowej

Detka A., Kaczmarek D., Domaradzki J.

Prace Naukowe Politechniki Warszawskiej. Elektronika

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2002

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z. 143

159-162

EN

For the investigation of welds joined with electron beam the methods like X-ray microanalysis or microscopic examination of cross-section are usually employed. The paper presents the improved method of specimen composition analysis using the backscattered electron signal (BSE) in the scanning electron microscope (SEM). The verification of BSE method has been done on the example of W-Mo weld by typical methods employed in metallography.

3

Pompa kriogeniczna o dużej wydajności pompowania

Moraw M., Hałas S., Detka A., Kirczuk C., Prasoł H.

Prace Naukowe Politechniki Warszawskiej. Elektronika

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2002

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z. 143

97-100

EN

This paper presents the results of the research on the imroved cryopump constructed on the basic of a two stage Gifford-McMahon refrigerator. The cryopump system without the screen of the second step element reached the pumping speed 4 m3/s for nitrogen and 0.8 m3/s for hydrogen. The effective pumping speed there are 1.5 m3/s and 0.75 m3/s respectively. The system make possible to reach the range of pressure 10-11 mbar during some hours of pumping.

4

Chłodziarka Gifforda-McMahona o zwiększonej mocy chłodniczej

Moraw M., Hałas S., Kirczuk C., Prasoł H., Detka A.

Prace Naukowe Politechniki Warszawskiej. Elektronika

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2002

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z. 143

101-104

EN

The paper presents methods and results of the optimization of construction of Gifford-McMahon`s refrigerator. The optimized cooling system has the following parameters: final temperature 12 K, 2 nd stage refrigeration power 2.3 W at 20K, cooling speed dT/dt=13.6 K/s.

5

Analysis of specimen composition with the complex method using the backscattered electrons

Kaczmarek D., Detka A.

Optica Applicata

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2002

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Vol. 32, nr 4

859-867

EN

For the investigation of different types of welds joined with electron beam the methods like the X-ray microanalysis or microscopic examination of cross-sections are usually employed. The work presents the improved method of specimen composition analysis with backscattered electron signal (BSE) in the scanning electron microscope (SEM). The method consists in: the application of the separation of information about composition and topography of examined specimens by introducing a correction term into the algorithm of COMPO mode creation, the linearization of backscattering coefficient characteristics versus an atomic number and application of colour simulation. The verification of obtained results has been done on the example of W-Mo weld by typical methods employed in metallography.

6

Separacja zanieczyszczeń olejowych z wylotowego strumienia pompy rotacyjnej

Detka A., Hałas S., Kirczuk C., Moraw M., Prasoł H.

Prace Naukowe Politechniki Warszawskiej. Elektronika

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1999

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z. 123

177-182

EN

Oil mist emitted by rotary vacuum pump contaminates the enyironment and atmosphere in technological rooms. The oil separator is a one of the effective means of reducing contamination quantity. The efficiency of separator with polypropylene fibber reaches 90 - 99,9%. Used as the 1-st stage of cleaning system, the separator extends the effective life times of charcoal output trap about 100 times.

7

Pompa kriosorpcyjna PK-160M

Detka A., Hałas A., Kirczuk C., Moraw M., Prasoł H.

Prace Naukowe Politechniki Warszawskiej. Elektronika

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1999

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z. 123

183-186

EN

Cryosorption pump used for generating ultra high, clean vacuum, is described. The pump PK-160M reaches 850 l/s pumping speed for nitrogen and 1000 l/s for hydrogen and makes possible to obtain ultimate pressure below 10(-10) mbar after l hour baking at 100° C.

8

Optymalizacja parametrów chłodziarki helowej

Detka A., Hałas A., Kirczuk C., Moraw M., Prasoł H.

Prace Naukowe Politechniki Warszawskiej. Elektronika

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1999

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z. 123

97-102

EN

The results of work on final temperature decrease of two-stage gifford-McMahon cryogenerator are presented. Due to increase of regenerator heat capacity and of the regenerator power, as well as optimization of the thermodynamic cycle the final cryogenerator temperature has fallen below 10 K.

9

Separacja par oleju w zasilaczu gazowym kriopompy

Hałas A., Moraw M., Prasoł H., Detka A., Kirczuk C.

Elektronika : konstrukcje, technologie, zastosowania

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1998

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Vol. 39, nr 5

24-26

PL

Opisano układ separacji oleju z gazu roboczego sprężanego przez konwencjonalne kompresory tłokowe. Dwustopniowy układ zawiera wykraplacz oleju chłodzony wodą oraz separator kapilarny. Wydzielony w wyniku separacji olej powraca do kompresora. Przetestowano i pokazano wyniki badań dwu rodzajów separatorów kapilarnych. Stosując separator z włókien sztucznych uzyskano skuteczność 99,997%.

EN

The oil removal system for the output gas from piston compressor is described. Two stage system contains the water cooled dropwise condensator and capillary oil separator. Oil secreted from gas comes back to compressor. Investigation of two separator designs has been made. In the system containing artificial fiber the separation efficiency of 99,997% has been obtained.