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PAR transmittance of dry and wet glass

Ivan Pollet (UGent) and Jan Pieters (UGent)
(2000) Acta Horticulturae. 534. p.285-292
Author
Organization
Abstract
A single, a low emissivity, and a double glass plate were investigated with respect to their transmittances in the photosynthetically active radiation (PAR) range. Directional-hemispherical transmittances of these glass plates were determined under laboratory conditions in the dry and the wet (i.e., condensate covered) states. The transmittance curve of the low emissivity glass plate lay below the one of the single glass plate and above the one of the double glass plate. The presence of a condensate layer caused a similar transmittance reduction for single and double glass. This reduction reached a maximum of 13 to 15% at incidence angles of 50-65 degrees. The transmittance reductions determined for the wet low emissivity glass were smaller and restricted to at most 11% at an incidence angle of 70 degrees. Assuming uniformly diffuse radiation, condensation was found to lower the transmittance by 8% for single and double glass and 5% for low emissivity glass.
Keywords
COVERING MATERIALS, TRANSMISSION, CONDENSATION, GREENHOUSE CLADDING MATERIALS, cladding material, greenhouse, light, condensation, horticulture, transmission, radiation, LIGHT, SOLAR

Citation

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Chicago
Pollet, Ivan, and Jan Pieters. 2000. “PAR Transmittance of Dry and Wet Glass.” In Acta Horticulturae, ed. M Teitel and BJ Bailey, 534:285–292. Leuven, Belgium: International Society for Horticultural Science (ISHS).
APA
Pollet, Ivan, & Pieters, J. (2000). PAR transmittance of dry and wet glass. In M. Teitel & B. Bailey (Eds.), Acta Horticulturae (Vol. 534, pp. 285–292). Presented at the International conference and British-Israeli workshop on Greenhouse Techniques Towards the 3rd Millennium, Leuven, Belgium: International Society for Horticultural Science (ISHS).
Vancouver
1.
Pollet I, Pieters J. PAR transmittance of dry and wet glass. In: Teitel M, Bailey B, editors. Acta Horticulturae. Leuven, Belgium: International Society for Horticultural Science (ISHS); 2000. p. 285–92.
MLA
Pollet, Ivan, and Jan Pieters. “PAR Transmittance of Dry and Wet Glass.” Acta Horticulturae. Ed. M Teitel & BJ Bailey. Vol. 534. Leuven, Belgium: International Society for Horticultural Science (ISHS), 2000. 285–292. Print.
@inproceedings{401279,
  abstract     = {A single, a low emissivity, and a double glass plate were investigated with respect to their transmittances in the photosynthetically active radiation (PAR) range. Directional-hemispherical transmittances of these glass plates were determined under laboratory conditions in the dry and the wet (i.e., condensate covered) states. The transmittance curve of the low emissivity glass plate lay below the one of the single glass plate and above the one of the double glass plate. The presence of a condensate layer caused a similar transmittance reduction for single and double glass. This reduction reached a maximum of 13 to 15\% at incidence angles of 50-65 degrees. The transmittance reductions determined for the wet low emissivity glass were smaller and restricted to at most 11\% at an incidence angle of 70 degrees. Assuming uniformly diffuse radiation, condensation was found to lower the transmittance by 8\% for single and double glass and 5\% for low emissivity glass.},
  author       = {Pollet, Ivan and Pieters, Jan},
  booktitle    = {Acta Horticulturae},
  editor       = {Teitel, M and Bailey, BJ},
  isbn         = {9789066059528},
  issn         = {0567-7572},
  keyword      = {COVERING MATERIALS,TRANSMISSION,CONDENSATION,GREENHOUSE CLADDING MATERIALS,cladding material,greenhouse,light,condensation,horticulture,transmission,radiation,LIGHT,SOLAR},
  language     = {eng},
  location     = {Haifa, Israel},
  pages        = {285--292},
  publisher    = {International Society for Horticultural Science (ISHS)},
  title        = {PAR transmittance of dry and wet glass},
  url          = {http://www.actahort.org/books/534/534\_33.htm},
  volume       = {534},
  year         = {2000},
}

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