Abstract
A twodimensional particle image velocimetry (PIV) system installed in a largesized wind tunnel was used toexamine the natural ventilation of fully open roof and Venlotype multispan greenhouses. Since the PIV system has rarelybeen used for largescale, lowturbulence airflow conditions, the PIV system was investigated to improve its performanceand accuracy. The PIV accuracy tests were conducted without any greenhouse models in the wind tunnel because it was verydifficult to insert the anemometer sensors in the smallscale greenhouse models, and it was also assumed that the sensor itselfcould affect natural airflow patterns inside the models. Good results were obtained in the PIV accuracy test, and the errorswere shown to be mostly in the .5% range. Additionally, the natural airflow in 2 to 10span greenhouses was investigatedusing the PIV system. The PIV results indicated that the PIV technique was an effective method for evaluating the relativeperformance of alternative designs of greenhouse and other structures with turbulent interior air distributions.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
