Please use this identifier to cite or link to this item: https://www.um.edu.mt/library/oar/handle/123456789/17892
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dc.contributor.authorFarrugia, Robert N.-
dc.contributor.authorSant, Tonio-
dc.date.accessioned2017-03-28T11:15:28Z-
dc.date.available2017-03-28T11:15:28Z-
dc.date.issued2013-
dc.identifier.citationFarrugia, R. N., & Sant, T. (2013). Modelling wind speeds for cup anemometers mounted on opposite sides of a lattice tower: a case study. Journal of Wind Engineering and Industrial Aerodynamics, 115, 173-183.en_GB
dc.identifier.urihttps://www.um.edu.mt/library/oar//handle/123456789/17892-
dc.description.abstractWhen mounted at an intermediate monitoring level on a meteorological mast or tower, a cup anemometer’s horizontal wind speed reading is influenced by the structure’s construction type, the anemometer’s relative position to the structure itself and by the wind vector angle. Although measurements at the topmost level of the structure are a basic prerequisite for wind resource characterisation, intermediate height measurements are also required to calculate wind shear characteristics at the site of interest. Cup anemometers mounted at intermediate levels will, to a certain degree, always be influenced by the meteorological mast. Locating the sensors on opposite sides of the structure allows the wind analyst to filter the data according to wind direction, thereby reducing the largest interference effects. Failure of one of these same-level, opposite cup anemometers would curtail the possibility of data filtering by direction. A technique that would redress the consequences of cup anemometer breakdown during a measurement campaign was thus devised and validated. The capability of the Levenberg–Marquardt (LM) method to model data from one cup anemometer to the other sensor on the opposite side of the tower was assessed by comparing the modelled (LM-generated) data with measured data. The LM algorithm was then used to build a relationship between wind speed records for different concurrent and ever-increasing measurement programme time frames from the two active, same-level anemometers and then failure of one of the sensors was simulated. This paper presents results from a case study using 12 months of wind speed and direction data captured by two, same-level cup anemometers attached to opposite sides of a lattice-type telecommunications tower on the Mediterranean island of Malta.en_GB
dc.language.isoenen_GB
dc.publisherElsevieren_GB
dc.rightsinfo:eu-repo/semantics/restrictedAccessen_GB
dc.subjectWind power -- Maltaen_GB
dc.subjectAnemometeren_GB
dc.subjectWinds -- Speeden_GB
dc.subjectWinds -- Speed -- Measurementen_GB
dc.titleModelling wind speeds for cup anemometers mounted on opposite sides of a lattice tower : a case studyen_GB
dc.typearticleen_GB
dc.rights.holderThe copyright of this work belongs to the author(s)/publisher. The rights of this work are as defined by the appropriate Copyright Legislation or as modified by any successive legislation. Users may access this work and can make use of the information contained in accordance with the Copyright Legislation provided that the author must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the prior permission of the copyright holder.en_GB
dc.description.reviewedpeer-revieweden_GB
dc.identifier.doi10.1016/j.jweia.2012.11.006-
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