Abstract
Abstract The effects of adding a sensible heat regenerator, in which condensation and subsequent evaporation can occur, to a fruit dehydrator are examined theoretically for several ambient air states and particular drying conditions. Results show that the required heat input to the system is a minimum when the ratio of fresh air to recirculated air is between 15% and 40% (depending on ambient inlet state), and when the regenerator transfers no moisture between the air streams. Under these conditions, 30% to 60% of the heat input required without a regenerator can be saved.
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