Fan Pad House

Hi-TechGreenhouse with Fan & Pad System

Hi-Tech Greenhouse with Fan & Pad System

The fan and pad system has been the standard system for evaporative cooling for more than 50 years. In this system, aspen or cellulose pads are mounted in one endwall or sidewall of the greenhouse. They are supplied with water from a pipe above the pads and excess water is collected in a gutter at the bottom.

Evaporative cooling, which uses the heat in the air to evaporate water from plants and other wetted surfaces can be used to cool the greenhouse as much as 10 to 12oC below the outside temperature. Although evaporative cooling is most effective in dryer climates, such as suitable for North, Central and west part of India.

An Overview of Fan and Pad Systems

The greenhouse environment can quickly become too hot for healthy plant production, even in the winter. During the summer months, extra cooling beyond what fan ventilation can provide may be necessary.

Benefits

  • Pad-and-fan systems provide lower temperature during hot periods of the year
  • Quick reaction of the pad-and-fan system to lower the temperature
  • Pad-and-fan systems can be installed in most greenhouse structures

Features

  • Pad-and-fan systems decrease temperature and increase humidity, thereby reducing transpiration rate of plants
  • Relatively cheap compared to fogging systems
  • Reduces the need for sun screens thus increasing light intensity which increases yields.

The heat that is needed for the evaporation is taken from the air itself. The air that leaves the pad is therefore cooled and humidified simultaneously without any external energy supply for the evaporation process. This type of Green House is suitable for the Secondary Hardening of Banana, Vegetable seedling & growing Strawberry cultwation etc.

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