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Simulation of a Heat Pump Dryer for Medicinal Plants
Author(s) -
Ziegler Thomas,
Jubaer Hasan,
Mellmann Jochen
Publication year - 2013
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201200123
Subject(s) - heat pump , environmental science , mode (computer interface) , process engineering , mechanical engineering , engineering , computer science , heat exchanger , operating system
Partially open and closed cycle modes of heat pump drying of medicinal plants were investigated theoretically as well as in industrial practice and were assessed from an energetic point of view. A simulation model was developed and validated with measurements performed at an industrial dryer. Design and control parameters for operation in partially open mode were calculated and implemented. Case studies for different operating conditions revealed that the partially open mode is more energy‐efficient than the closed cycle mode. Comparisons with conventional drying ascertained the feasible ambient conditions for heat pump operation. Almost all probable meteorological conditions during the drying season in Germany were covered in the analyses.