Wind driven ventilation of a mono-span greenhouse with a rose crop and continuous screened side vents and its effect on flow patterns and microclimate

摘要: Although high greenhouse tunnels are often used by growers in the Mediterranean basin, data on distributed microclimate within such structures is limited. Experiments were carried out a naturally ventilated mono-span with continuous screened side vents to determine ventilation rate, temperature, humidity and air velocity distributions energy partitioning of incoming radiation. Results indicate that rate increases linearly wind speed. When blows perpendicularly opening plane there cross-flow between windward leeward openings results gradients crop temperatures sides. Gradients observed vertical direction as well. The temperature ratio larger near roof than while was higher roof. those encountered horizontal parallel mean flow (from opening). root square (RMS) values all three components, RMS normalised difference inside outside turbulent fluxes generally one. Nearly 75% net radiation consumed latent heat plant transpiration only about 14% converted sensible heat.