Other energy-saving techniques are being devised by researchers worldwide. Lining greenhouse benches with black plastic tubes of water is one such technique. In theory, the water tubes will absorb sunlight energy during the day and release it slowly at night. Tighter sealing of glass glazing panels is another technique for slowing heat escape from the glass greenhouse. The installation of a plastic false ceiling to cut off some of the roof space that otherwise requires heating can also reduce energy needs.
Windbreaks are also being used in some operations in which there is sufficient land around the greenhouse. If properly designed and not placed so close that they reduce the amount of light, windbreaks can reduce the temperature lowering effect of winds. It is also logical and imperative that the greenhouse operator keep the heating system in good condition to maximize its efficiency and repair cracks or tears in the glazing, loose panels, or damaged door seals as soon as they are discovered.
Many methods are being tried; the next decade will begin to see their results. There is no question that the greenhouse industry has entered into a period of change.
