A novel water droplet size parameter for calculation of icing on power lines

Jian Zhang, Qing He, Lasse Makkonen

    Research output: Contribution to journalArticleScientificpeer-review

    2 Citations (Scopus)

    Abstract

    Collision efficiency is an important parameter for an icing prediction model. It mainly depends on wind velocity, conductor diameter and water droplet diameter. However, water droplets have a spectrum of sizes, which makes the task of calculating the overall collision efficiency time consuming. Therefore, some representative droplet sizes have been used, such as the median volume diameter. In this paper, a novel representative droplet diameter is presented for the calculation of the collision efficiency. The results are compared with those using the median volume diameter and the entire droplet size spectrum. The results show that this parameterization provides a more stable approximation than the median volume diameter when the collision efficiency changes, and is more appropriate when the collision efficiency is small. Mathematical explanation for this is given, and the limitation of this method is discussed.
    Original languageEnglish
    Pages (from-to)65-70
    Number of pages6
    JournalCold Regions Science and Technology
    Volume149
    DOIs
    Publication statusPublished - Feb 2018
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    power line
    droplet
    collision
    Water
    water
    Parameterization
    calculation
    parameter
    parameterization
    wind velocity
    prediction

    Keywords

    • ice accretion
    • collision efficiency
    • water droplet diameter
    • size spectrum
    • median volume diameter

    Cite this

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    title = "A novel water droplet size parameter for calculation of icing on power lines",
    abstract = "Collision efficiency is an important parameter for an icing prediction model. It mainly depends on wind velocity, conductor diameter and water droplet diameter. However, water droplets have a spectrum of sizes, which makes the task of calculating the overall collision efficiency time consuming. Therefore, some representative droplet sizes have been used, such as the median volume diameter. In this paper, a novel representative droplet diameter is presented for the calculation of the collision efficiency. The results are compared with those using the median volume diameter and the entire droplet size spectrum. The results show that this parameterization provides a more stable approximation than the median volume diameter when the collision efficiency changes, and is more appropriate when the collision efficiency is small. Mathematical explanation for this is given, and the limitation of this method is discussed.",
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    author = "Jian Zhang and Qing He and Lasse Makkonen",
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    A novel water droplet size parameter for calculation of icing on power lines. / Zhang, Jian; He, Qing; Makkonen, Lasse.

    In: Cold Regions Science and Technology, Vol. 149, 02.2018, p. 65-70.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - A novel water droplet size parameter for calculation of icing on power lines

    AU - Zhang, Jian

    AU - He, Qing

    AU - Makkonen, Lasse

    PY - 2018/2

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    N2 - Collision efficiency is an important parameter for an icing prediction model. It mainly depends on wind velocity, conductor diameter and water droplet diameter. However, water droplets have a spectrum of sizes, which makes the task of calculating the overall collision efficiency time consuming. Therefore, some representative droplet sizes have been used, such as the median volume diameter. In this paper, a novel representative droplet diameter is presented for the calculation of the collision efficiency. The results are compared with those using the median volume diameter and the entire droplet size spectrum. The results show that this parameterization provides a more stable approximation than the median volume diameter when the collision efficiency changes, and is more appropriate when the collision efficiency is small. Mathematical explanation for this is given, and the limitation of this method is discussed.

    AB - Collision efficiency is an important parameter for an icing prediction model. It mainly depends on wind velocity, conductor diameter and water droplet diameter. However, water droplets have a spectrum of sizes, which makes the task of calculating the overall collision efficiency time consuming. Therefore, some representative droplet sizes have been used, such as the median volume diameter. In this paper, a novel representative droplet diameter is presented for the calculation of the collision efficiency. The results are compared with those using the median volume diameter and the entire droplet size spectrum. The results show that this parameterization provides a more stable approximation than the median volume diameter when the collision efficiency changes, and is more appropriate when the collision efficiency is small. Mathematical explanation for this is given, and the limitation of this method is discussed.

    KW - ice accretion

    KW - collision efficiency

    KW - water droplet diameter

    KW - size spectrum

    KW - median volume diameter

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    U2 - 10.1016/j.coldregions.2018.01.021

    DO - 10.1016/j.coldregions.2018.01.021

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    EP - 70

    JO - Cold Regions Science and Technology

    JF - Cold Regions Science and Technology

    SN - 0165-232X

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