مقالے کی معلومات
جلد
شمارہ
مقالے کی قسم
زبان
تلخیص
Although green house air heaters are often used throughout the southern Yangtze River basin in China, few data exist to
indicate the proper placement of warm-air-delivery ducts, the arrangement of their air outlets, and the impact of thermal
screens on the heated green houses environment. To better understand these issues, we develop herein a thermal-environment
model of a Venlo-type glass green house on a winter night. The model is based on the standard k turbulence model, the
buoyancy model, and the porous-medium model, and simulations based on this model are done by using commercial
computational fluid dynamics software. The results indicate that the thermal distribution at the crop-canopy height
significantly impacts crop growth and quality, so we used temperature distribution to evaluate the effect of the various
heating parameters. We find that a higher average temperature and a greater temperature difference occur for downward
vents than for horizontal vents. In addition, higher average temperature and smaller temperature difference occur for a
thermal screen 3.6 m above the floor than for no thermal screen. Finally, we optimize the placement of the warm-air-delivery
duct and the location of the outlet openings to obtain a more uniform thermal distribution and, thereby, better crop growth.
Wu Feiqing, Xu Fang, Zhang Libin. (2015) Numerical Simulation And Parameters Optimization Of Heated Glass Greenhouse, , Volume-52, Issue-3.
-
Views
454 -
Downloads
63