Ways to Improve the Utilization of Solar Energy in Solar Greenhouses

First, rational design planning, standard construction. The layout and layout of the design are reasonable, and the solar greenhouses with standardized construction are large and evenly distributed. The energy consumption of the second-generation energy-saving solar greenhouse is generally larger than that of the first-generation greenhouse, but the uniformity of light distribution is poor. In the design of greenhouses, the ratio of the lighting surface to the reasonable plane angle is required to be as large as possible. The greenhouse orientation requires something to be extended. The north of the greenhouse is facing south and the east-west is offset. The general requirement is not to exceed 10 degrees, and the elevation angle of the rear roof is appropriate. The angle is about 42 degrees. should. Second, choose the appropriate film. The type of film and the oldness of the film have great influence on the light transmission. Generally, the transmittance of the plastic film is reduced by 20%-30% when water droplets are adsorbed on the plastic film. At the same time, due to the influence of ultraviolet ray irradiation and high and low temperature, the shed film produces “aging” phenomenon and the light transmittance The decrease was 20%-40%. In terms of using raw materials, the highest UV transmittance was the pe film, followed by the eva film, and the pvc film was the lowest. Third, keep the film clean. The degree of cleanliness of the shed film has a great influence on the light transmittance, and it is required to clean the debris of dust and grass on the shed film every day. The most important measure to ensure the cleanliness of the film is to periodically flush the film. Fourth, hang a reflective screen. Anti-wall hanging screens can significantly improve the light intensity of low-light areas in greenhouses, which is beneficial to the growth of crops. Fifth, rational close planting and timely adjustment of plants. Through proper close planting and plant adjustment, ventilation and light transmission conditions in the greenhouse can be ensured to ensure robust crop growth. Six, the use of plastic film covering technology, can improve the lower part of the plant light, and reduce humidity.