Heating
In some regions, heating is required in a greenhouse. Heating requirements are determined by the crop, minimum mean temperature and predicted heat loss from the greenhouse.
Many factors are considered when designing a greenhouse heating solution. These include: covering properties, volume of air exchange, the structure itself, temperature differential and wind conditions. In addition, the heating system must be suited to the available energy sources in the region.
Vegtech provides a choice of two heating options that provide uniform heat dispersal, and accurately and efficiently control temperature and humidity.
- Hot Water Method:
This heating method is partly based on direct radiation, in which parts of the plant receive direct radiation from the heating pipes.
The water temperature is normally controlled by 3- 4-way valves, which control the ratios of hot and cold water.
The system enables the establishment of a continuous temperature regimen, with few fluctuations. Another advantage is that heat dispersal inside the greenhouse is uniform. Control and command are carried out by the central system computer. - Hot Air Method:
The burner causes combustion in the burning cell. Heat thus produced is ejected and passes over the external walls of the burning cell by radiation and convection.
Cold air passing over the burning cell is sucked into the greenhouse cavity, is heated and is then released through the sleeves into the greenhouse.
The air circulation process is executed by a centrifugal blower, which is operated by an electric motor. Heat in the greenhouse is dispersed through a system of perforated sleeves.
