Abstract
The herbs are being extensively used in Indian families as medical purpose in dried state. Many a time, it is open sun dried or control oven dried. But, open sun drying is unhygienic and inefficient process for herb drying. Further, the aroma of the herbs is get compromised at times in control oven drying. The present work discusses the herb drying process cum grinding in controlled sun drying with persevering the aroma and quality of the herb to be dried. The study shows the effect of collector area exposed to sunshine and the useful heat gain at collector end, and in the drying chamber, further the instantaneous thermal efficiency is evaluated. The various heat losses in the cabinet and their effect on the system efficiency are calculated. The area of collector is exposed to sunshine (Ac) (ranging from 0.6 to 1 m2) for the study. The maximum thermal efficiency obtained is around 85.22%. It is observed that at lower temperature difference, i.e. at 5 °C, the instantaneous thermal efficiency is higher as compared to the 7 °C. Further, total 246 W-h is sufficient for grinding 20 kg dried herbs leaves. This study helps to find out the optimum conditions at which the drying process needs to be performed which would result in improved dryer performance.
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References
Adelaja AO, Ojolo SJ (2010) Design, analysis and experimental evaluation of photovoltaic forced convection solar dryer for the tropics. Int J Eng Res Afr 3:49–61
Belessiotis V, Delyannis E (2011) Solar drying. Sol Energy 85:1665–1691
Madhlopa A, Jones SA, Kalenga Saka JD (2002) A solar air heater with composite absorber systems for food dehydration. Renew Energy 27:27–37
Basu SN, Karmakar A, Bhattacharya P (2015) Growth of solar energy in India—present status and future possibilities 3(5). ISSN: 2347–2820 (Online)
Bhardwaj AK, Chauhan R, Kumar R, Sethi M, Rana A (2017) Experimental investigation of an indirect solar dryer integrated with phase change material for drying Valeriana jatamansi (medicinal herb). Case Stud Therm Eng 10:302–314
Lingayat A, Chandramohan VP, Raju VRK (2017) Design, development and performance of indirect type solar dryer for banana drying. Energy Procedia 109:409–416
Bolaji BO, Olalusi AP (2008) Performance evaluation of a mixed-mode solar dryer. AU J Technol 11(4):225–231
Adelaja AO, Babatope BI (2013) Analysis and testing of a natural convection solar dryer for the tropics. J Energy, 8, ArticleID479894
Duffie JA, Beckman WA (1980) Solar engineering of thermal processes, 2nd edn. Wiley, Hoboken
Fagbenle RO (1991) Optimum collector tilt angles and average annual global radiation for Nigerian locations. Niger J Renew Energy 2:9–17
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Kamble, A., Bakal, P., Patil, K. (2019). Novel Dryer cum Grinding Unit: A Thermal Analysis of Herbs Drying. In: Saha, P., Subbarao, P., Sikarwar, B. (eds) Advances in Fluid and Thermal Engineering. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-6416-7_37
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DOI: https://doi.org/10.1007/978-981-13-6416-7_37
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