Jokiel, M.; Bantle, M.; Kopp, C. and Verpe, E.H. (2020) Modelica-based modelling of heat pump-assisted apple drying for varied drying temperatures and bypass ratios. Thermal Science and Engineering Progress, 19, p. 100575.
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Document available online at: https://www.sciencedirect.com/science/article/pii/S2451904920300937
Summary
Drying is an energy and time intensive process in which thermal energy demand is mostly provided by fossil resources. It is important to increase the energy efficiency of drying processes especially in the food processing industry in terms of organic products and sustainability. The potential for using a heat pump with CO2 as a working media to provide heating and cooling in the drying cabinet was investigated for typical food drying temperatures of 50–70 °C and for various ratios of moist air being bypassed.
A dynamic heat pump-assisted dryer model was developed and experimentally validated. The model was created with respect to heat transfer, pressure loss and flow requirements. The simulation results show that a closed loop heat pump-assisted drying process reduces the energy demand by up to 84% compared to open loop drying processes with fossil resources as the energy source. The specific moisture extraction rate for a heat pump dryer is up to four times higher than that of an open loop dryer. However, in the heat pump dryer case the drying time is increased by up to 69%.
EPrint Type: | Journal paper |
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Keywords: | Heat pump, Food drying, Modelica, Simulation, Convective drying, Batch dryer, CO2, R744 |
Agrovoc keywords: | Language Value URI English drying http://aims.fao.org/aos/agrovoc/c_2402 English apples http://aims.fao.org/aos/agrovoc/c_541 |
Subjects: | Food systems > Recycling, balancing and resource management Food systems > Processing, packaging and transportation Environmental aspects > Air and water emissions |
Research affiliation: | European Union > CORE Organic > CORE Organic Cofund > SusOrgPlus Norway > SINTEF |
Horizon Europe or H2020 Grant Agreement Number: | 727495 |
DOI: | 10.1016/j.tsep.2020.100575 |
Deposited By: | von Gersdorff, Gardis J.E. |
ID Code: | 40180 |
Deposited On: | 07 Jul 2021 12:31 |
Last Modified: | 07 Jul 2021 12:31 |
Document Language: | English |
Status: | Published |
Refereed: | Peer-reviewed and accepted |
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