Changing Characteristics Of Internal Environment In The North Energy-saving Solar Greenhouses

In recent years,infrastructure of greenhouse industry has been developing very fast in china. As of 2014,greenhouse area had 3.79 reached million hectares. In 2010,Heilongjiang greenhouse area was 10 thousands hectares. The greenhouse construction structure is varied, such as LiaoShen type、AnShan type、ShanDong type、DongNong type、43 type etc. As the different regional、season、application, greenhouse building structure is varied. And in reality there are many unreasonable construction and not standard, so sorts of reasons cause greenhouse structure different in the regional. Different structure types of greenhouse cause different internal environment, different internal environment causes the yield and quality of gardening in greenhouse is differ. At present, there are many greenhouse structures research[1][2][3], but still have not a study on the system of the internal environment and greenhouse structures. Therefore, this study will be researched on the relation between structure and environment of the system. In practice, not only meaningful for gardening in greenhouse, also providing the scientific basis and rational utilization for the region building greenhouse.This experiment in daqing city zhaozhou county shuangfa tuogu vegetable cooperative several different kinds structure of energy-saving solar greenhouse as the research object. Choose the local had builded different structuregreenhouse(including sunlight roof、after slope elevation、bearing、internal wall structure、vent position)do annual internal main environmental analysis of changing characterists;putting different Structure of greenhouse as object of studytake every two greenhouse measurement method at the same time in winter,studing on the greenhouse temperature humidity the processing effects and the influences of light environment,the results show that:1、In winter and spring, with the increasing of greenhouse roof daylighting, adding the optical radiation in greenhouse the same time. In addition, improves the light distribution in the greenhouse, increases air temperature and ground temperature and greenhouse temperature uniformity of the space position, reduces the relative humidity in greenhouse.2、With the slope Angle increasing、slope length decreaseing、after slope projection length shorting, increases the greenhouse optical radiation, improves the light distribution of greenhouse, significantly increases air temperature and ground temperature, but the clear day relative humidity is less.3、In winter and spring, the stability of greenhouse air temperature、ground temperature、wall temperature is recessed wall better than plane wall. Recessed wall significantly increases the air temperature near north wall.4、In cold season,slope after ventilation way significantly reduces greenhouse relative humidity, but the temperature is less than the back wall ventilation,the temperature of Slope after ventilation way greenhouse is less than the back wall ventilation mode.In the summer after slope ventilation temperature is greater than the back wall ventilation way, slope after ventilation significantly raduces greenhouse relative humidity.5、In winter the ture south greenhouse has most ability accept radiation,light radiation decreased with the greenhouse by west, but the south by west 5 ° greenhouse air temperature and ground temperature is most suitable, south by west 5 ° greenhouse relative humidity is least under clears day, in cloudy days no obvious difference.