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Title

STUDY OF THE EFFECT OF DRYING CONDITIONS ON ENERGY CONSUMPTION IN VACUUM DRYER

Author(s)

 NADI FATEMEH

Pages

  -

Keywords

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Abstract

 DRYING IS A HIGHLY ENERGY-INTENSIVE (CONSUMING ENERGY) PROCESS INVOLVING 10–20% OF TOTAL INDUSTRIAL ENERGY USED IN MOST DEVELOPING COUNTRIES. THIS STUDY WAS CONDUCTED TO EVALUATE ENERGY CONSUMPTION UNDER VARIOUS DRYING CONDITIONS IN VACUUM DRYING. TESTS WERE CONDUCTED USING APPLE SLICES IN VACUUM DRYER AT THREE TEMPERATURE LEVELS (50, 60 AND 70OC) AND UNDER THREE PRESSURE LEVELS (20, 30 AND 40 KPA). EXPERIMENTAL RESULTS SHOWED THAT MINIMUM AND MAXIMUM ENERGY CONSUMPTION WERE OBTAINED 3 AND 9.8 KW.H FOR THE PRESSURE OF 20 KPA AND THE TEMPERATURE OF 70OC AND THE PRESSURE OF 40 KPA AND THE TEMPERATURE OF 50 °C, RESPECTIVELY. IT WAS FOUND THAT THE IMPORTANT FACTOR AFFECTING ENERGY CONSUMPTION WAS DRYING AIR TEMPERATURE.

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