大型立体种植温室温湿度模拟分析
Simulation and analysis of temperature and humidity in large-scale three-dimensional planting greenhouses
摘要：
针对大型立体种植温室夏季高温高湿环境调控难题,本文使用CFD进行模拟,构建了温室物理模型,模拟分析了风机高度、风机流速及喷雾流量对室内温湿度场的影响。结果表明:较低的风机安装高度(0.5 m)有利于在有效降温的同时控制植物区湿度,避免高位风机(如2.5 m)导致的湿度过高问题;适中的风机流速(2.0 m/s)可平衡降温与除湿效果,避免高风速引入过多高温室外空气;较低的喷雾流量(1.5 g/s)能在降温的同时,防止植物区湿度过高引发病害。
Abstract：
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.
Keywords:greenhouse; temperature and humidity control; spray cooling; mechanical ventilation; fan height; fan flow rate; spray flow rate