Indoor air temperature and humidity variation of a greenhouse base on field test: A case study in Shandong

The indoor thermal and humid environment of the solar greenhouse, especially air humidity, is studied by field test psychrometric chart. First, temperature relative radiation in greenhouse were tested tests. According to results, Solar has a great influence on humidity greenhouse. vary dramatically presence radiation. At night, although meets requirements crop growth, close 90%, far higher than suitable area (60-65%). Then, night condition was analyzed based Indoor does not need be dehumidified, but could heated reduce humidity. Finally, variation ratio analyzed. natural ventilation are important factors affecting During period, increases air, reduces