1. Natural ventilation to cool down
Natural ventilation is one of the most economical and effective cooling methods. Generally, it can effectively achieve the purpose of cooling and demystification in the spring and autumn, using the principle of hot air floating. Therefore, our vents are effectively arranged at the highest point of the greenhouse. At the same time, the natural vents also have the function of replenishing carbon dioxide and dehumidifying. Therefore, natural ventilation openings for large-scale multi-span greenhouses are indispensable. The circular arch multi-span greenhouses generally have two roll film vents on the left and right sides of the circular arch, and the pattern multi-span greenhouses generally have staggered tops. Open the window.
2. Fan water curtain cooling system
The principle of fan water curtain cooling is to use the principle of evaporation heat absorption, so this system has a great relationship with the humidity of the air, and effectively reduces the temperature between 3-9 degrees. The basic effective minimum temperature will also be around 26 degrees. It will not be lower or even less likely to achieve the air-conditioning effect. This needs to be understood, but in dry air areas, the proper arrangement of fan water curtains and indoor temperature can meet the normal growth needs of plants. There is no problem.
3. High pressure spray cooling system
High-pressure spray cooling can reach about 2 degrees per cubic meter of air per gram of water. Therefore, the spray cooling efficiency is very high for outdoor air. In theory, the energy required for spray cooling is to overcome the increase in surface tension of water. When 1 cubic meter of water becomes a 10 micron cube, the energy required for surface tension is about 43,200 joules, and the latent heat of evaporation is as high as 2.2 billion joules, and its theoretical energy efficiency ratio is as high as 50,000. Limited by the law, the theoretical maximum energy efficiency ratio for a temperature drop of 5°C at 30°C is about 60.
