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Greenhouse humidification

Humidification systems are automatic systems designed to spray water in the form of a mist uniformly and with total coverage of the greenhouse.

How to control humidity in your greenhouse?

The management of the various interacting environmental factors in a greenhouse often determines the success of a good crop. In this way we will:

  • Ensure the viability of the crops
  • Extend their production cycle
  • Improve the working conditions of your staff.

Humidity Control Systems in greenhouses

Pan and Fan Cooling System

The Cooling system consists of a system of evaporative panels for cooling the greenhouse, improving the temperature and humidity levels in the different compartments.

How does the Pan&Fan Cooling system work?

The Cooling system works by renewing the interior air with the outside air, which has had its temperature reduced and its humidity increased by means of evaporation produced as it passes through a panel with cells of different inclination and position.

The system consists of pumping equipment that supplies the water to the top of the panel and distributes it evenly through a distribution duct. The water flows from top to bottom across the surface of the panel, with some of this water evaporating into the flow of dry outside air passing through the panel, the heat required for the evaporation of the water is taken from the air itself, so the air at the panel outlet is cooled and humidified without any external energy source.

The rest of the water washes the panel and is drained back to the pumping equipment tank via a collection system, where it is recirculated. This tank renews the lost water through a general filling channel.

The air thus treated evolves in the room from inlet to outlet, evacuating the heat load and providing the temperature and humidity conditions required by plants, animals and personnel.

Evaporative cooling system components:

  • Fans: provide the renewal of the air volume housed. They are usually louvered helicoidal fans, operating as extractors.

  • Evaporative panel: usually made of sheets of cellulose folded at different angles, joined together to form a panel of cells.

  • Pared húmeda de paneles evaporativos: los paneles empleados son empapados con agua. Wet wall of evaporative panels: the panels used are soaked with water. The wall has a soaking channel at the top and a concentrate collection channel at the bottom.

  • Trunking system: Supporting and drainage trunking for panels, consisting of aluminium trunking, perforated water distribution pipe, distribution panel and trunking supports.

  • Pumping equipment: for recirculation of water to the panels.

Greenhouse Misting Systems

Fog System or High Pressure Fog System

High pressure fogging systems or Fog Systems are irrigation systems that expel water producing fine mist.

These increase humidity and achieve cooling in greenhouses and spaces that require greenhouses and spaces that need to obtain the maximum reach and the best performance of the spraying systems. These also offer the quality of a “dry” spraying.

The pressurized water exits through a small diameter orifice so that the jet crashes against a concave wall that discharges and distributes the mist in a nebulized form.

Components of a high-pressure fogging unit

  • Physical-chemical pre-treatment equipment for feeding water.

  • Pressurisation equipment.

  • Distribution networks.

  • Spray nozzles: system that allows the application of low flow rates of water at high pressure (50-80 bar) with droplet sizes small enough to favour its evaporation into the air generating “dry” steam.

FOGGER or Low Pressure Humidification System

Low pressure misting systems are systems designed to increase humidity and achieve cooling in greenhouses at the lowest cost.

These systems are recommended to correct conditions of high water deficit during the early stages of the crops and to avoid excessive temperatures.

Elements of the low pressure fogging installation

  • Pressurisation equipment: electric pump to supply the flow and pressure required by the nozzles.

  • Fogging head: Fogging pumping head with the flow supply demanded by the valves and shifts of the project.

  • Distribution networks and sectorisation of coverage

  • Spray nozzles: a system that allows the application of low water flow rates at relatively low pressure (1-4 bar) with droplet sizes small enough to favour their evaporation into the air. An adequate distribution in number, as well as the position and orientation of each of the nozzles allows to obtain the best results.

Control the temperature and humidity of your greenhouse

To improve the humidity and temperature conditions in greenhouses NOVAGRIC installs humidification and nebulization systems that will allow you to reduce the hydric and thermal stress of the plants in hot climates to improve the conditions of your crops.

Our agricultural technology projects

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FAQs about humidity in greenhouses

These systems are recommended to obtain atmospheres with:

  • High relative humidity in seedbeds
  • Germination chambers
  • Grafting rooms
  • Farm
  • Premises with controlled atmospheres
  • In air conditioning processes where air cooling is required by means of evaporative air conditioning with the highest possible efficiency.

Greenhouse misting applies water with smaller droplets than micro-spraying with the objective not only to supply water and fertilizer to the plants, but also to regulate the pressures in the sprinkler head, thus contributing to:

  • Increasing the relative humidity of a greenhouse.
  • Cooling the greenhouse by lowering the temperature, which can be combined with a forced ventilation system.
  • Applying automated treatments such as the application of foliar fertilizers, phytosanitary products, or any other water-soluble product.

Yes, there are different nozzle models that can be installed according to production needs.

It is mainly used in the irrigation of seedbeds in greenhouses. It is perfect for the cultivation of tender cuttings, plant germination and fodder production in greenhouses.