Analyse On Temperature And Humidity Properties Of Honeycomb Wall Greenhouse

Using brick wall greenhouse as the control, the paper measured temperature and humidity indoor and outside greenhouses and the analyzed the heat preservation property of honeycomb wall greenhouse by theoretical analysis and experimental verification in2013-2014.1. Compared to3types of greenhouses which is commonly used in production (solid greenhouse, brick wall greenhouse and heating greenhouse), the physical property of honeycomb wall greenhouse was better and the indoor temperature in winter was higher than others. The inside surface wall material of honeycomb wall greenhouse was of light, porous and has large heat storage area. Honeycomb wall has larger nominal resistance and thermal inertia, it also has a better thermal stability, the indoor temperature fluctuation is small.2. Wall properties of honeycomb wall greenhouse and brick wall greenhouse were determined, the results showed that heat of the wall was transferred horizontally, the more deep the wall is, the more smoothly the temperature fluctuate. The wall temperature of honeycomb wall greenhouse at the depth of5cm,10cm,15cm were higher than the wall temperature of brick wall greenhouse. In the daytime, the property of storage heat of honeycomb wall greenhouse was better than the brick wall greenhouse, the speed which storage heat of honeycomb wall is fast than brick wall, and storage more heat, In the night (17:00to7:00a.m. the next day), the property of release heat of honeycomb wall greenhouse was better than the brick wall greenhouse, it means the honeycomb wall released more heat to the greenhouse. The average wall temperature of honeycomb wall greenhouse at the depth of5cm,10cm,15cm were higher than brick wall greenhouse with4.7℃,5.2℃,5.2℃respectively. The minimum temperature of honeycomb wall in the different depth were14.9℃,15.6℃,16.4℃, the brick one were13.3℃,14.1℃,14.9℃. The maximum temperature of honeycomb wall at the depth of5cm,10cm,15cm were11.0℃,12.8℃,11.8℃higher than brick wall greenhouse. The night temperature of honeycomb wall at the depth of5cm,10cm,15cm were3.5℃,3.5℃,4.1℃higher than brick wall greenhouse. The capacity of heat release from wall in depth of5cm,10cm,15cm were6.8℃,7.8℃,8.3℃higher than brick wall. Both wall temperature indoor greenhouses were positively related to the indoor and outside temperature. The change range of wall temperature in cloudy day was less than the sunny day indoor.3. Temperature and relative humidity of the honeycomb wall greenhouse and brick wall greenhouse were determined, the results showed that the air temperature of honeycomb wall greenhouse is higher than brick wall greenhouse with2.9℃. The indoor relative humidity was slightly lower than brick wall greenhouse. The average temperature of honeycomb wall greenhouse and brick wall greenhouse were23.7℃and20.8℃, the minimum temperature were10.7℃and9.0℃respectively, the highest temperature were50.2℃and48.1℃respectively. During14:00-17:00, the cooling speed in honeycomb wall greenhouse and brick wall greenhouse were6.9℃/h,7.5℃/h, cooling range were20.6℃,22.4℃respectively. It indicated that the honeycomb greenhouse has a good heat preservation property and its cooling speed is slower than the brick greenhouse. The average night temperature of honeycomb wall greenhouse and brick wall greenhouse were16.9℃and14,3℃, respectively, the night temperature of honeycomb wall greenhouse was2.6℃higher than the brick greenhouse. The average relative humidity of them was70.7%and71.9%. The change range of indoor air temperature in cloudy day was less than the sunny day.4. Comparing the property of soil temperature of the honeycomb wall greenhouse and brick wall greenhouse, the soil temperature of honeycomb wall greenhouse is higher, the average soil temperature of honeycomb wall greenhouse at the depth of5cm,10cm,15cm were16.3℃,15.8℃,15.5℃, while the average soil temperature of brick wall greenhouse were15.3℃,15.4℃,15.4℃The minimum soil temperature of the honeycomb greenhouse in different depth soil were11.4℃,12.9℃,14.1℃, the brick one were11.0℃,12.9℃,13.7℃. In the different weather, the temperature difference of two greenhouses was sunny days> cloudy days> snow days. The correlation between the change of soil temperature and indoor temperature was high, the relevance between soil temperature and indoor and outdoor temperature was lower with the soil depth.