Simulation and analysis of temperature and humidity in large-scale three-dimensional planting greenhouses

Aiming at the problem of regulating the high temperature and humidity environment in large-scale three-dimensional planting greenhouses in summer, this paper uses CFD to simulate, builds a greenhouse physical model, and simulates and analyses the effects of fan height, fan flow rate and spray flow rate on indoor temperature and humidity fields. The results show that a lower fan installation height (0.5 m) is conducive to effective cooling while controlling the humidity in the plant zone, avoiding the problem of excessive humidity caused by high-level fans (such as 2.5 m). A moderate fan flow rate (2.0 m/s) can balance the cooling and dehumidification effects and avoid the introduction of too much high-temperature outdoor air at high fan flow rates. A lower spray flow rate (1.5 g/s) enables cooling while preventing diseases caused by excessive humidity in the plant zone.