Greenhouse cooling by NIR-reflection

S. Hemming, F. Kempkes, N. van der Braak, T.A. Dueck, A. Marissen

    Research output: Contribution to journalArticleAcademicpeer-review

    Abstract

    Wageningen UR investigated the potential of several NIR-filtering methods to be applied in horticulture. In this paper the analysis of the optical properties of available NIR-filtering materials is given including a calculation method to quantify the energy reduction under these materials and to estimate the contribution for greenhouse cooling. It can be concluded that the optimum NIR-filtering material is still not found but there is good potential for further developments. NIR-filtering multilayer coatings applied to plastic film or glass filter out NIR most effectively. NIR-filtering is not desirable during winter-time in most climatic regions. Therefore, NIR-filtering coverings should not be used in unheated greenhouses since they cause an undesirable temperature drop. NIR-filtering white washes still reduce PAR too much. NIR-filtering (moveable) screens could be an alternative in the future. Future studies should also investigate whether it is possible to use the reflected NIR energy for other processes or cost-effectively storage.
    Original languageEnglish
    Pages (from-to)97-106
    JournalActa Horticulturae
    Volume719
    DOIs
    Publication statusPublished - 2007

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    cooling
    greenhouses
    process energy
    plastic film
    optical properties
    horticulture
    coatings
    glass
    winter
    energy
    methodology
    temperature

    Cite this

    Hemming, S. ; Kempkes, F. ; van der Braak, N. ; Dueck, T.A. ; Marissen, A. / Greenhouse cooling by NIR-reflection. In: Acta Horticulturae. 2007 ; Vol. 719. pp. 97-106.
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    title = "Greenhouse cooling by NIR-reflection",
    abstract = "Wageningen UR investigated the potential of several NIR-filtering methods to be applied in horticulture. In this paper the analysis of the optical properties of available NIR-filtering materials is given including a calculation method to quantify the energy reduction under these materials and to estimate the contribution for greenhouse cooling. It can be concluded that the optimum NIR-filtering material is still not found but there is good potential for further developments. NIR-filtering multilayer coatings applied to plastic film or glass filter out NIR most effectively. NIR-filtering is not desirable during winter-time in most climatic regions. Therefore, NIR-filtering coverings should not be used in unheated greenhouses since they cause an undesirable temperature drop. NIR-filtering white washes still reduce PAR too much. NIR-filtering (moveable) screens could be an alternative in the future. Future studies should also investigate whether it is possible to use the reflected NIR energy for other processes or cost-effectively storage.",
    author = "S. Hemming and F. Kempkes and {van der Braak}, N. and T.A. Dueck and A. Marissen",
    year = "2007",
    doi = "10.17660/ActaHortic.2006.719.8",
    language = "English",
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    issn = "0567-7572",
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    Greenhouse cooling by NIR-reflection. / Hemming, S.; Kempkes, F.; van der Braak, N.; Dueck, T.A.; Marissen, A.

    In: Acta Horticulturae, Vol. 719, 2007, p. 97-106.

    Research output: Contribution to journalArticleAcademicpeer-review

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    T1 - Greenhouse cooling by NIR-reflection

    AU - Hemming, S.

    AU - Kempkes, F.

    AU - van der Braak, N.

    AU - Dueck, T.A.

    AU - Marissen, A.

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    AB - Wageningen UR investigated the potential of several NIR-filtering methods to be applied in horticulture. In this paper the analysis of the optical properties of available NIR-filtering materials is given including a calculation method to quantify the energy reduction under these materials and to estimate the contribution for greenhouse cooling. It can be concluded that the optimum NIR-filtering material is still not found but there is good potential for further developments. NIR-filtering multilayer coatings applied to plastic film or glass filter out NIR most effectively. NIR-filtering is not desirable during winter-time in most climatic regions. Therefore, NIR-filtering coverings should not be used in unheated greenhouses since they cause an undesirable temperature drop. NIR-filtering white washes still reduce PAR too much. NIR-filtering (moveable) screens could be an alternative in the future. Future studies should also investigate whether it is possible to use the reflected NIR energy for other processes or cost-effectively storage.

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