Heating system
|
The heating system of a greenhouse usually consists of two main components: the heat generator and distributor of heat. The two elements commonly used to distribute heat are water and air. As for generating heat, several options are available, generally determined by the nature of the fuel to be used: natural gas, propane, biomass, fuel oil, biodiesel, etc.
Air heating systems or aerotherms: There are two main methods for the distribution of hot air: by propeller or with polytubes. The main fuels used for unit heaters are propane, natural gas and biodiesel. The main advantage of the air heating system is its more affordable cost, and its ease of use. Furthermore, the initial setup is fast and heat generation is immediate on demand. Hot water heating system This system relies on the use of large boilers in which water is heated before being circulated in the greenhouse through metal pipes that distribute heat by radiation. This system is very effective because it distributes heat at plant level, where it is needed, without heating up all the air of the greenhouse. Hot water systems are therefore more energy efficient than air systems. However, the initial investment for this equipment is more substantial and the start-up will take more time than air systems. The heat is also not instantly available since one must first heat the water, which itself will be redistributed in the greenhouse to circulate the heat. It is recommended to use hot water systems with computerized climate control systems and extensive proactive climate management. |
