High Pressure Mist Nozzle/Spray Systems

<sup>Both high and low-pressure mist systems are used for cooling and adding humidity to the greenhouse. Mist systems can be employed in both mechanically and naturally ventilated greenhouses. Mist systems work by forcing water through nozzles that break up the water into fine droplets. This process allows the droplets to evaporate fairly quickly into the air. Because the evaporation of water requires heat from the environment, the air is cooled. Misting systems must be carefully controlled for two reasons: to provide the required cooling without increasing the relative humidity beyond optimum levels for plant performance and to prevent free water from forming on the plants, which can encourage the development of disease. If the quality of the water used for misting is poor, there is the possibility of mineral salts being deposited on the leaves and fruit, which could result in reduced fruit quality and yield loss.

The agricultural sector has undergone numerous improvements in recent years that have led to the proliferation of new techniques for all types of crops. And one of the areas that has received the greatest advances is irrigation, which has new systems that are much more efficient and sustainable. This is the case, for example, the mist or fog irrigation system.</sup>

^{Misting is one of the most widely used irrigation mechanisms nowadays, especially in greenhouses. It is so called because the water is sprayed out in the form of a mist by means of micro-sprinkler belts placed on top of the crops. This produces a fog-like sensation thanks to the layers of very fine droplets emitted at a pressure of between 3 and 5 bar.}

^{Unlike more conventional techniques like sprinkler irrigation, fog irrigation applies a more efficient drip, is more easily adapted to all soils and is less labour intensive. Its installation is very simple. It consists of flexible polyethylene strips with micro-perforations that are secured to the floor by pins.}
 

Thanks to the size of the droplets and the uniformity of this system, the benefits and advantages of fog irrigation are multiple. Its main advantages over other systems are:

Uniformity. The water is sprayed through small perforations on the strips, which ensures that it is spread more evenly over the entire crop.

No crop damage. Another advantage of mist irrigation is that it avoids direct impact of water on crops or plants. Which results in a higher utilisation and production.

More sustainable. Fog irrigation, as it is more uniform, avoids the generation of puddles. In this way, the depth can be better controlled as irrigation is always superficial, which avoids leaching. Fully recyclable. Facilitates proper waste management as all materials are recyclable.

More versatile. The fog irrigation system works at a pressure of about 2 kg, lower than the sprinkler system. This makes it suitable for all types of farms.

All of the above advantages contribute to reducing irrigation time by half. For example, in a crop that would require 60 minutes for a complete cycle with sprinkler irrigation, with misting this time is reduced to 20-30 minutes.

Tianjin Sunshine Greenhouse Imp. & Exp.  Co., Ltd. (Sunshine Greenhouse) is a high-tech enterprise in the integration of product research and development, process design, manufacturing, installation, sales and after-sales. The company locates in Tianjin which is close to the seaport with convient transportation. We have been involved in agricultural business for almost 20 years and already built more than 600,000 square meters of different types of greenhouses in and abroad for hydroponic, seedling and nusery, flower planting, vegetable and fruit, entertainment and other industries. Sunshine Greenhouse studies and introduces domestic and foreign advanced scientific and technological achievements continuously to supply high-efficiency, save-energy and environmental products and solution to the customers.