Analysis of the efficiency of natural ventilation in a multi-span greenhouse using CFD simulation
학회지: 생물환경조절학회지 8(1), 9 - 18 쪽
저자: 이인복, Short, Ted H
개요
Natural ventiation ina four and one-half span, double polyethylene commercial greenhouse was investigated with actual data collected at Quailcrest Farm near Wooster, Ohio. Moreover, acomputational fluid dynamics (CFD) numerical technique, FLUENT V4.3, wasused to predict natural ventilation rates, thermal conditions, and airflow distribution in the green house. The collected climate data showed that the multi-span greenhouse was well ventilated by the natural ventilation system during the typical summer weather conditions. The maximum recorded air temperature difference between inside and outside the greenhouse was 3.5 0C during the hottest (34.70C) recorded sunny day; the air temperatures in the greenhouse were very uniform with the maximum temperature difference between six widely dispersed locations being only 1.70C. the CFD models peredicted that air exchange rates were as high as 0.9 volume per minute (A.C min-1) with 2.5m/s winds from the west as designed.
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