Products

The material of these curtains is polyethylene, polyester sheet, polyester sheet covered with aluminum. These curtains are placed between the plant and the roof and lead to a reduction of about 30% of heat loss in winter. Polyester sheet prevents the passage of heat rays better than polyethylene. These curtains can be used throughout the fall and winter season, or they can be drawn every evening and removed the next morning (similar to the short day system used to make chrysanthemums bloom). Temporary curtains can be automatic or semi-automatic.

Most of the curtains have an aluminum surface on one side, which at night, returns the heat rays towards the soil and plants and prevents them from leaving the environment. Protective curtains prevent heat transfer by convection or convection and keep hot air around the plant and away from the cover. These curtains preserve heat in the winter nights and in the summer by preventing the sun's rays from entering on sunny days, it reduces the energy required to cool the greenhouse, and if black curtains are used and completely block the light in the summer They shorten the length of the day. Also, due to the fact that it almost isolates the space above the curtain, by creating an almost insulated space, it prevents heat transfer between the greenhouse and the outside space to a large extent, and reduces the cost of energy consumption in the cold and hot seasons of the year.

The disadvantages of the shade system are that this mechanism has a sensitive operation, its automatic type is one of the expensive mechanisms of the greenhouse, this mechanism requires more protection and maintenance, but considering the many advantages and also the absence of any other alternative, The implementation of the shade mechanism is inevitable for modern greenhouses and especially educational research greenhouses