Low temperature dryers
In low temperature drying systems, the moisture content of the product is usually brought
in equilibrium with the drying air by constant ventilation. Thus, they do tolerate
intermittent or variable heat input. Low temperature drying enables products to be dried in
bulk and is most suited also for long term storage systems. Thus, they are usually known as
bulk or storage dryers. Their ability to accommodate intermittent heat input makes low
temperature drying most appropriate for solar-energy applications. Thus, some
conventional dryers and most practically-realised designs of solar-energy dryers are of the
low temperature type(Ekechukwu and Norton, 1999).