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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 ...
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. ...
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 ...
Encapsulated Water Hammer: Theoretical/Experimental Study
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-10-22)
Water hammer phenomenon involves the transformation of kinetic energy in pressure energy, this transformation occurs as the fluid conditions change inside the pipe in quite a short time. Industry requires to affront frequent flow interruptions in pipe systems due to the closing of valves or stopping of pumping equipment. This phenomenon can initiate serious damages like destruction of the pipe system ...
State of the Art Review of Atmospheric Icing Sensors
(Journal article; Peer reviewed; Tidsskriftartikkel, 2016-03-31)
A state of the art review of atmospheric icing sensors is presented in this article, in order to
understand their design and working principle for future developments. It is found that most atmospheric icing
sensors which are capable of delivering maximum information are based upon direct measurement of the
physical properties (electrical or mechanical) of atmospheric ice. Some field measurements ...
Numerical study of atmospheric ice accretion on rotating geometric cross sections with fins
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-12)
This paper describes the numerical study of atmospheric ice accretion on rotating geometric cross sections,
circular,
hexagon and square
, all having fins, to select an optimum geometric cross section for use as a rotating part of a newly-
proposed designed icing sensor. Computational fluid dynamics-based numerical analyses were carried out in this research
work to understand and analyse the ...
Multiphysics based Numerical Study of Atmospheric Ice Accretion on a Full Scale Horizontal Axis Wind Turbine Blade
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08)
Atmospheric icing on wind turbines have been recognized as a hindrance
to the development of the wind power in cold regions, where uncertainty
surrounding the effects of icing on energy production may prevent
otherwise good wind resources from being utilized. This research paper is
focused on to numerically simulate the rate and shape of atmospheric ice
accretion on a full-scale horizontal axis ...