ABSTRACT
Most solar collectors designed for grain and crop drying
are active air systems without heat storage. They consist
of a single or double pass collector, fan or blower, and
ducting. Plans are available for fixed and movable flat
plate collectors, solar attics and walls, inflated tube collec-
tor (Figs. 1 and 2), and wrap-around solar bin collector[1]
(Fig. 3). These provide low-temperature heat that is ade-
quate for drying crops. Additional heat may be necessary
from a fossil fuel heater or other source. If possible, the
collector should be located so that it can provide heat for
the home or work area when not in use for crop drying.
Some portable collectors have been developed that can be
moved to another location and application (Fig. 4).
