Utilization of CO₂Influenced by Windbreak in an Elevated Production System for Strawberry
학회지: Joumal of Bio-Environment Control 18(1), 29 - 39쪽
저자: 김용희, 이인복, 전창후, 황현섭, 홍세운, 서일환, 유재인, J.P. Bitog, 권경석
개요
The influence of windbreak to minimize the ventilation velocity near the plant canopy of a greenhouse strawberry was thoroughly investigated using computational tluid dynarnics (CFD) technology Windbreaks were constructed sunound.ing the plant canopy to control ventilation and maintain the concentration of the supplied CO2 from the soil surface close to the strawberry plants. The influence of no windbreak, 0.15 m and 0.30 m height windbreaks with varied air velocity of 0.5, 1.0 and 1.5 m/s were simulated in the study. The concentrations of supplied CO2 within the plant canopy of were measured. To simplify the model, plants were not included in the final model. Considering 1.0 m/s wind velocity which is the normal
wind velocity of greenhouses, the concentrations of CO2 were approximately 420, 580 and 653 ppm ( 1 x 10-9 kg/m3 ) for no windbreak, 0.15 and 0.30 m windbreak height, respectively. Considering that the maximum concentration of CO2 for the strawberry plants was around 600-800 ppm, the 0.30 m wi ndbreak height is highly recommended. This study revealed that the windbreak was very effective in preserving CO2 gas within the plant canopy. More so, the study also proved that the CFD technique can be used to determine the concentration of CO2 within the plant canopy for the plants consumption at any designed condition. For an in-depth application of this study, the plants as well as the different conditions for CO2 utilization, etc should be considered.
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