Effect of Underground Ventilation Pipe on Thermal Environment of Solar Greenhouse(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Effect of Underground Ventilation Pipe on Thermal Environment of Solar Greenhouse

Author(s):: WANG Zhao; ZOU Zhirong; CHEN Zhendong; College of Horticulture,Northwest Agriculture and Forestry University,Yangling,Shaanxi 712100

Abstract:: In this study,the heat exchange system of stainless steel,HDPE,promoted PVC material were taken as the research object,compared with traditional PVC. Different depth of soil temperature,inlet and outlet temperature and humidity of four systems were analyzed to choose a material that excellent performance in environment control and heat-storaging performance. The results showed that in daytime stainless steel was similar performance to promoted PVC in cooling,and the two groups were better than control group,at night promoted PVC was the best heat insulation;promoted PVC was the best dehumidification at night with stainless steel following; at the depth of 30 cm,stainless steel thermal storage was better than control group,at night promoted PVC was the best heat insulation; at the depth of 20 cm,in sunny days heat storage of stainless steel and heat insulation were better than control group;in cloudy,promoted PVC heat insulation had obvious advantages;at the depth of 10 cm,four groups performance was similar. Consider the greenhouse thermal environment,promoted PVC was the best material.

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Last Update: 2017-11-14