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dc.date.accessioned2011-10-11T13:36:23Z
dc.date.available2011-10-11T13:36:23Z
dc.date.issued2011
dc.identifier.issn1612-9830
dc.identifier.uriurn:nbn:de:hebis:34-2011072538416
dc.identifier.urihttp://hdl.handle.net/123456789/2011072538416
dc.language.isoeng
dc.publisherKassel University Pressger
dc.subjectsolar dryingeng
dc.subjectdrying efficiencyeng
dc.subjectdrying rateeng
dc.subjectbamboo shootseng
dc.subjectcentral Vietnameng
dc.subject.ddc630
dc.titleUsing a Double-pass solar drier for drying of bamboo shootseng
dc.typeAufsatz
dcterms.abstractThree different drying methods, a forced convection double-pass solar drier (DPSD), typical cabinet type natural convection solar drier (CD) and traditional open-sun drying (OSD) were used for draying of bamboo shoots in central Vietnam. During drying the operational parameters such as drying temperature, relative humidity, air velocity, insolation and water evaporation have been recorded hourly. The mean drying temperatures and relative humidity in the drying chamber were 55.2°C, 23.7%; 47.5°C, 37,6%; 36.2°C, 47.8% in DPSD, CD and OSD, respectively. The mean global radiation during all experimental runs was 670 Wm^−2. The result also shows that fastest drying process was occurred in DPSD where the falling-rate period was achieved after 7 hours, in change to OSD where it took 16 hours. The overall drying efficiency was 23.11%, 15.83% and 9.73% in case of DPSD, CD and OSD, respectively. Although the construction cost of DPSD was significantly higher than in CD, the drying costs per one kilogram of bamboo shoots were by 42.8% lower in case of DPSD as compared to CD. Double-pass solar drier was found to be technically and economically suitable for drying of bamboo shoots under the specific conditions in central Vietnam and in all cases, the use of this drier led to considerable reduction in drying time in comparison to traditional open-sun drying.eng
dcterms.accessRightsopen access
dcterms.bibliographicCitationIn: Journal of Agriculture and Rural Development in the Tropics and Subtropics. Kassel : Kassel University Press. - Vol. 111, No. 2 (2010), S. 119-127
dcterms.creatorBanout, Jan
dcterms.creatorEhl, Petr
dc.description.everythingGedruckte Ausg. im Verlag Kassel Univ. Press (www.upress.uni-kassel.de) erschienen.ger


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