Mechanical ventilation or natural ventilation can be used in greenhouse projects
Greenhouse engineering is the construction of vegetable greenhouses, flower greenhouses, ecological restaurants, sightseeing exhibition halls and other projects. The ventilation system is very important in greenhouse engineering, and mechanical ventilation or natural ventilation can be used in greenhouse engineering. Mechanical ventilation requires louver inlets, exhaust fans, and electrical systems. Natural ventilation) utilizes two physical phenomena: thermal buoyancy (warm air rises with low density) and ventilation effect (outside air flows in through the side windows, creating a pressure difference that creates wind). The condition of ventilation is to have air inlets and outlets, fans and power systems. Some greenhouses do not use fans but artificial methods. Compared to mechanical ventilation, natural ventilation consumes less electricity, except that there is noise when the windows are open. When using natural ventilation, it is also necessary to set up a spray device, because the outdoor wind speed is usually low in summer, and the effect of natural ventilation is not obvious. Remember that no matter the ventilation method, the indoor temperature is never lower than the outdoor temperature.
For most single-family greenhouse projects that are narrow and long, mechanical ventilation is required to draw wind from the air intake, through the entire greenhouse to the opposite exhaust fan, while natural ventilation is to draw wind through the side windows and skylights. flow between. For multi-span greenhouse projects, the air inlet and outlet of mechanical ventilation are installed on both sides, and shade nets are required in addition to natural ventilation.
The natural ventilation system also includes the roof design of the greenhouse project, which can maximize the circulation of air, so that the indoor temperature is close to the outdoor temperature. And mechanical ventilation is impossible to move such a large amount of air to achieve the same effect. When the insect-proof net is installed in the greenhouse, this factor must be taken into account in the ventilation efficiency, because the insect-proof net is often larger than the air intake area, preventing a large amount of air from entering.
No matter which ventilation method is used, a smooth air flow in the greenhouse project is very important, because only in this way can the environment around the plants be similar and the plants grow neatly and uniformly. Therefore, in order to promote the horizontal flow of air, a fan needs to be installed.
