A semi-closed greenhouse is mechanically cooled in the summer with a heat pump. This involves harvesting the sun’s heat and storing it in order to use it for heating in the winter.
Semi-closed cultivation is aimed at reducing ventilation, and from an energetic viewpoint is beneficial for (unilluminated) fruit-vegetables, tropical pot plants and cultivation where both heat and cold are needed.
How does it work?
- In the greenhouse, a top cooling system is installed in order to reduce the daytime temperature.
- The system only goes into operation at a previously-set level of insolation.
- In the evening, we reduce the greenhouse temperature rapidly, to the plants’ benefit.