ABSTRACT
Heat pump dryers have been known to be energy
efficient when used in conjunction with drying oper-
ations. The principal advantages of heat pump dryers
emerge from the ability of the heat pumps to recover
energy from the exhaust gas as well as their ability to
control the drying gas temperature and humidity.
Many researchers have demonstrated the importance
of producing a range of precise drying conditions to
dry a wide range of products and improve their quality.
At the same time, MacArthur (1984) has mentioned
the need to optimize component and system design to
increase energy efficiency in heat pump systems.
