What type of cooling is most commonly used in greenhouses?

Evaporative cooling is the most commonly used cooling method in greenhouses due to its efficiency and effectiveness in managing temperature and humidity levels within these controlled environments. This method operates on the principle that when water evaporates, it absorbs heat from the surrounding air, resulting in a temperature drop.

In greenhouses, maintaining optimal temperatures is crucial for plant growth, and evaporative cooling can provide a cost-effective solution. It works particularly well in dry climates, where increased humidity from water evaporation is beneficial for plants. This technique often employs wet pads or misting systems that enhance air circulation, ensuring that the cooled air is distributed evenly throughout the greenhouse.

This method is typically preferred over refrigerative cooling because it uses significantly less energy, making it more sustainable and economical for large agricultural spaces. Additionally, unlike radiant or convection cooling methods, evaporative cooling directly addresses the effects of both heat and humidity, which are critical factors for the health of greenhouse plants.