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Field Study of LWC and MVD Using the Droplet Imaging Instrument
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.ORCID iD: 0000-0002-5324-002X
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
Swedish Meteorol & Hydrol Inst (SMHI), Sundsvall.
2019 (English)In: IEEE Transactions on Instrumentation and Measurement, ISSN 0018-9456, E-ISSN 1557-9662, Vol. 68, no 2, p. 614-622Article in journal (Refereed) Published
Abstract [en]

The droplet imaging instrument (DII) is a new instrument for cost-effective in situ measurements of the size and concentration of water droplets. The droplet size distribution and the concentration of atmospheric liquid water are important for the prediction of icing on structures, such as wind turbines. To improve the predictions of icing, there is a need to explore cost-effective working solutions. Through imaging, a wide range of droplet sizes can be measured. This paper describes a study of the atmospheric liquid water content and the median volume diameter using the DII and a commercial reference instrument--the cloud droplet probe 2 from Droplet Measurement Technologies Inc. The measurement is done at a weather measurement station in mid-Sweden. For a second validation, the result is compared with predictions using a numerical weather prediction model. The size measurement of the DII is verified using polymer microspheres of four known size distributions. The study shows that the DII measurement is precise, but there is a systematic difference between the two compared instruments. It also shows that droplets larger than 50 μm in diameter are occasionally measured, which we believe is important for the prediction of icing.

Place, publisher, year, edition, pages
IEEE, 2019. Vol. 68, no 2, p. 614-622
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-34304DOI: 10.1109/TIM.2018.2843599ISI: 000454332000030OAI: oai:DiVA.org:miun-34304DiVA, id: diva2:1242543
Projects
SMART (Smarta system och tjänster för ett effektivt och innovativt samhälle)
Note

Date of Publication: 20 June 2018

Available from: 2018-08-28 Created: 2018-08-28 Last updated: 2019-09-09Bibliographically approved

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Rydblom, StaffanThörnberg, Benny

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