An analysis of selected atmospheric icing events on test cables
- Univ. du Quebec, Chicoutimi, Quebec (Canada)
- Ecole de Technologie Superieure, Montreal, Quebec (Canada)
- Hydro-Quebec, Montreal, Quebec (Canada)
In cold countries, the design of transmission lines and communication networks requires the knowledge of ice loads on conductors. Atmospheric icing is a stochastic phenomenon and therefore probabilistic design is used more and more for structure icing analysis. For strength and reliability assessments, a data base on atmospheric icing is needed to characterize the distributions of ice load and corresponding meteorological parameters. A test site where icing is frequent is used to obtain field data on atmospheric icing. This test site is located on the Mt. Valin, near Chicoutimi, Quebec, Canada. The experimental installation is mainly composed of various instrumented but non-energized test cables, meteorological instruments, a data acquisition system, and a video recorder. Several types of icing events can produce large ice accretions dangerous for land-based structures. They are rime due to in-cloud icing, glaze caused by freezing rain, wet snow, and mixtures of these types of ice. These icing events have very different characteristics and must be distinguished, before statistical analysis, in a data base on atmospheric icing. This is done by comparison of data from a precipitation gauge, an icing rate meter and a temperature sensor. An analysis of selected icing periods recorded on the cables of two perpendicular test lines during the 1992--1993 winter season is presented. Only significant icing events have been considered. A comparative analysis of the ice load on the four test cables is drawn from the data, and typical accretion and shedding parameters are calculated separately for icing events related to in-cloud icing and precipitation icing.
- OSTI ID:
- 400785
- Report Number(s):
- CONF-9606279-; ISBN 0-7918-1493-9; TRN: IM9650%%191
- Resource Relation:
- Conference: 14. international conference on offshore mechanics arctic engineering (OMAE), Florence (Italy), 16-20 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of OMAE 1996 -- Proceedings of the 15. international conference on offshore mechanics and arctic engineering. Volume 4: Arctic/polar technology; Nixon, W.A. [ed.] [Univ. of Iowa, Iowa City, IA (United States). Iowa Inst. of Hydraulic Research]; Sodhi, D.S. [ed.] [Army Cold Regions Research and Engineering Lab., Hanover, NH (United States)]; Kennedy, K.P. [ed.] [Canmar/Amoco Canada, Calgary, Alberta (Canada)]; Yamaguchi, H. [ed.] [Univ. of Tokyo (Japan)]; Bugno, W. [ed.] [Chevron, San Ramon, CA (United States)]; PB: 130 p.
- Country of Publication:
- United States
- Language:
- English
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