Greenhouse Cooling Systems
Greenhouse Cooling Systems
In modern greenhouse technologies, temperature and humidity control are critical for efficient production. The ideal temperature range for plant growth is 18–27 °C, with a humidity level of 60–80%. Especially during summer months, when outdoor temperatures exceed 30 °C, plant growth slows down; at temperatures of 40 °C and above, growth completely stops. Therefore, the use of greenhouse climate control systems is essential.
1. Passive (Compressor-Free) Cooling Systems
1.1. Evaporative Cooling System (Fan-Pad System)
The evaporative cooling system operates with special cooling pads and fans placed on the side walls of the greenhouse. Hot air passing through the pads is cooled by the evaporation of water in the pads and distributed into the greenhouse via fans.
Advantages:
- Low energy consumption.
- Highly efficient, especially in dry climates.
- Can reduce temperatures by 8–18 °C.
Technical Specifications:
- 1 m² of cooling pad can cool approximately 20–30 m² of greenhouse area.
- Pad heights: 1.5–2 m, thickness: 10–15 cm.
- Distance between fans: 6–9 m; distance between fan and pad: max. 45 m.
1.1.1. Evaporative Cooling + Ventilation System
Cooled air from the pads is distributed homogeneously within the greenhouse through plastic air ducts. Servo-motorized dampers are used in the system to control indoor CO levels and ventilation.
1.2. Fogging System
Microscopic water droplets sprayed at high pressure (70–120 bar) absorb heat from the air and cool the greenhouse. It works effectively, especially in regions with low dry and wet bulb temperatures.
Advantages:
- High energy efficiency.
- A passive cooling method.
- Absorbs heat from the environment during water evaporation (1 kg of water ≈ 600 kcal/h energy).
2. Active (Compressor-Based) Cooling Systems
2.1. Cooling Units
2.1.1. Air-Cooled Units
2.1.2. Water-Cooled Units
3. Ultra Climate System
Next-Generation Solution for Climate Control with Ultra Climate System
Developed to provide maximum efficiency and climate control in greenhouses, the Ultra Climate System brings a new perspective to modern agricultural practices with its advanced technological components.
System Components
This system ensures homogeneous air circulation from bottom to top within the greenhouse, minimizing temperature differences. Thus, ideal microclimate conditions are created for plants.
How It Works?
The Ultra Climate System operates in a fully closed-loop cycle. Traditional window systems are not used. Air taken from the outside is processed in a special enclosed chamber through cooling pads and distributed into the greenhouse via tarps mounted under the gutter systems. A portion of this air is expelled through exhaust fans located on the roof, while the remaining air is reintroduced into the enclosed chamber, continuing the cycle.
Advantages:
- Reduces greenhouse indoor temperature to 22–24 °C in hot climates during summer.
- Operates with high efficiency in cold climates.
- Maintains optimal temperature ranges, such as 18 °C at night and 24 °C during the day.
- Provides a fully isolated, controlled greenhouse environment independent of external weather conditions.
3. Heat Pump Systems
Systems that provide both heating and cooling functions. As they fall under the renewable energy category, they are eligible for incentives and loans.
3.1. Air-Source Heat Pumps
