Zobrazeno 1 - 10
of 37
pro vyhledávání: '"E.A. Hammer"'
Publikováno v:
Aquaculture. 451:283-288
The objective of this study was to verify the optimal AC frequency range to be used during industrial electro-stunning, i . e . electro-narcosis, of Atlantic salmon ( Salmo salar ) by investigating the electrical impedance spectra of the combined fis
Publikováno v:
Aquaculture. 434:277-281
To understand the importance of electrical frequencies on stunning, recovery and inflicting injuries, Atlantic salmon ( Salmo salar ) were exposed for 5 s to either 217 V, 50 Hz, AC or 107 V coupled AC + DC at 200 Hz, containing a high frequency spec
Publikováno v:
IEEE Sensors Journal. 5:153-160
Multimodality sensing is used for monitoring of multiphase hydrocarbon flow where there is a need to measure the quantity of oil, water and gas in a cross section of a pipe originating from an oil well. Information on the flow regime, i.e., the physi
Autor:
E.A. Hammer, Jarle Tollefsen
Publikováno v:
Flow Measurement and Instrumentation. 9:25-32
A capacitance sensor configuration which can measure the water fraction and undissolved gas in crude oils with higher accuracy than currently available non-intrusive capacitance sensors has been studied. In this sensor the surface electrodes are heli
Publikováno v:
Measurement Science and Technology. 8:691-701
The problem of how to meter oil - water - gas mixtures has been a significant one in the oil industry since the early 1980s. Since then, considerable research has been conducted into the development of a three-phase flowmeter suitable for use in an o
Autor:
Ø. Olsen, T.O. Skoglund, Geir Anton Johansen, B.T. Hjertaker, S.K. Strandos, E.A. Hammer, E. Åbro, Ø. Isaksen, T. Froystein
Publikováno v:
The Chemical Engineering Journal and the Biochemical Engineering Journal. 56:175-182
A dual mode tomograph for three-component flow imaging has been designed and is being built in a cooperative project between the University of Bergen, Christina Michelsen Research AS and Norsk Hydro AS. It is based on an eight-electrode capacitance t
Publikováno v:
SPIE Proceedings.
There are many principles for interface level detection in separation tanks based on capacitance, ultra sound, microwave, nuclear radiation etc. These principles work well in many situations, in others they fail. The high frequency magnetic field pri
Autor:
Geir Anton Johansen, E.A. Hammer
Publikováno v:
Measurement + Control, Vol 30 (1997)
Publikováno v:
Measurement. 3:7-14
This paper describes the use of a non-intrusive capacitance transducer for the simultaneous on-line measurement of water and undissolved gas in crude oil. The water concentration of the flow is determined from the mean capacitance of the flowing mixt
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