Experiments were conducted with the aim to examine the airflow characteristics (permeability and porosity) of some currently employed greenhouse screens, and to obtain equation coefficients for estimation of free convection heat transfer between heating pipes and the air, and horizontal screen and the air. Experiments demonstrated that thermal and shading screens have permeabilities of approximately 10-11m2 and their porosities are less than 10&Eth;Free convective heat transfer coefficient () for the upper and lower screen surface is given, respectively by =3.24 ΔT0.30 and =2.16 Δ0.31.
|Title of host publication||Proceedings of the Second International Symposium on Models for Plant Growth and Environmental Control, Wageningen, The Netherlands, August '97|
|Publication status||Published - 1998|
Miguel, A. F., van de Braak, N. J., & Bot, G. P. A. (1998). Modelling of transport phenomena near greenhouse screens. In Proceedings of the Second International Symposium on Models for Plant Growth and Environmental Control, Wageningen, The Netherlands, August '97 (pp. 371-374). (Acta Horticulturae; No. 456). https://edepot.wur.nl/16572