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Now showing items 1-10 of 16
Charge Transfer Scheme for Atmospheric Ice Sensing
(Peer reviewed, 2015-01-31)
The atmospheric icing parameters are being measured nowadays with the aid of more customized yet limited commercial equipment. The parameters include atmospheric ice detection, icing load and icing rate. The robustness of such equipment is usually under scrutiny when it comes to cold/harsh environment operations. This phenomenon was experienced consistently by the atmospheric Icing Research Team at ...
A case study to estimate thermal conductivity of ABS in Cold Climate Chamber
(Journal article; Peer reviewed; Tidsskriftartikkel, 2015-10-22)
Non steady state thermal conductivity of ABS was estimated using an analytical approach in a Cold Climate Chamber at ?10?C and ?14?C. Two hollow cylinders of ABS of varying thickness were used to estimate the conductivity. The material was porous but the porosity was unknown. This paper is a case study to understand, if it is reasonable to estimate the thermal conductivity using the analytical varying ...
Torque and Axial Loading Physics for Measuring Atmospheric Icing Load and Icing Rate
(Peer reviewed, 2015-01-31)
Measuring icing load and icing rate are important parameters for an atmospheric icing sensor. A new icing sensor has recently been designed and developed at Narvik University College for measuring atmospheric icing rate, icing load and icing type. Unlike the existing atmospheric icing sensors commercially available in market, which uses the axial loading for measuring icing load and icing rate, this ...
To Measure Relative Permittivity of Atmospheric Ice Using Frequency Sweep
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-10-31)
The use of AD59333 IC for detecting atmospheric ice and atmospheric ice type was evaluated in this
article. A prototype circuit was developed and was tested using a frequency sweep from 40 Hz to 20 kHz. The IC
was calibrated using 100 kΩ resistor. The real and imaginary components of discrete Fourier transform were
recorded at each frequency increment in order calculate the gain factor at each ...
A field study of atmospheric icing analysis in a complex terrain of the high north
(Journal article; Tidsskriftartikkel; Peer reviewed, 2014-12)
Analyses of atmospheric icing events hold the key for computing the significant parameters
leading to icing load calculations. In the cold regions of the high north, atmospheric icing
loads on structures become important when it comes to design and safety of infrastructures.
Furthermore, icing load calculations over a certain period of time provide a vital input for
designers to improve the ...
Atmospheric ice accretion on non rotating vertical circular cyliner
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-10-22)
Study of atmospheric ice accretion on a non-rotating vertical circular cylindrical object was carried out at dry and wet ice conditions. Both numerical and experimental techniques were used during this study. 3D numerical study was carried out using computational fluid dynamics based approach, whereas experimental study was carried out at Cryospheric Environmental Simulator ‘CES’ in Shinjo, Japan. ...
Atmospheric Icing Sensors - Capacitive Techniques
(Peer reviewed, 2013-01-22)
The application of capacitive sensing technique is widely distributed in different physical domains primarily because of the diversity in dielectric permittivity and due to its minimum loading error and inertial effects. Atmospheric ice is a complex mixture of water, ice and air which is reflected in its complex dielectric constant. There are many existing atmospheric icing sensors but only few are ...
Mutual Charge Transfer for Estimating Salinity Ratio for Offshore Icing Sensors
(Peer reviewed, 2015-11-30)
For offshore measurements in Cold Regions, salinity of ice is also a critical parameter (together with
many other parameters such as icing type, load, icing rate and melting rate) to be identified in order to optimize
the performance of anti/de icing systems. Although there are some available sensory solutions in the market to
measure real time salinity levels of water, however there are still ...
Experimental study of relative permittivity of atmospheric ice
(Journal article; Peer reviewed; Tidsskriftartikkel, 2013-01-01)
Atmospheric icing on onshore and offshore structures
is problematic, if we don’t detect and remove it.
Despite of various ice detection techniques, capacitor
based ice sensing technique is interesting one, as it
is based on dielectric properties of material. This technique of measuring icing event is simple and cost-
effective. Based on the dielectric concept, an experi
mental ...
Using Mutual Charge Scheme to Measure Salinity of Ice
(Journal article; Peer reviewed; Tidsskriftartikkel, 2015)
For offshore measurements in Cold Regions, salinity of ice is also a critical parameter (together with many other parameterssuchasicingtype,load,icingrateandmeltingrate)to be identified in order to optimize the performance of anti/de icing systems. Although there are some available sensory solutions in the market to measure real time salinity levels of water, however there are still not many real ...