CASE STUDY OF MICROWAVE ASSISTED ATMOPSHERIC FREEZE DRYING OF GREEN PEAS

摘要：

　　Atmospheric freeze drying (AFD) is a dehydration process able to handle temperature sensitive products.Due to pressure gradients the ice,present in the frozen product,is thereby sublimated.Microwave radiation with power levels of 0,140,280,420 and 560 Watt was applied in combination with a fluid bed AFD in order to increase the sublimation rate when drying at a temperature of -6oC.In the investigations performed the drying time was reduced by 70% at a power level of 560 Watt.Applying moderate microwave loads can still decrease the drying time between 20% and 40%,and additionally provide a high product quality.The microwave efficiency was approximately 30% and the specific moisture extraction rate (SMER) was increased by 0.1-0.3 kgwaterkWh-1,resulting in better energy efficiency for the investigated microwave drying system.

关键词： convective drying fluid bed drying microwave specific moisture extraction ratio

作者: T.M.Eikevik O.Alves-Filho M.Bantle

作者单位: Department of Energy and Process Engineering,Norwegian University of Science and Technology,NO-7049 Trondheim,Norway

会议类型: 国际会议

会议名称: The 18th International Drying Symposium Conference(第十八届国际干燥学术大会(IDS2012))

会议地点: 厦门

会议语种:英文

页码: 1-7

在线出版日期: 2012-01-11（万方平台首次上网日期，不代表论文的发表时间）