PENGEMBANGAN DESAIN PENGERING VAKUM DENGAN MENGGUNAKAN NOZEL INJECTOR

Suryanto Suryanto, Nur Hamzah, Akhmad Taufik

Abstract


The present study evaluated the energy efficiency and drying time of a vacuum dryer. This novel vacuum dryer is the initial design which is being developed. The drying process experiment was carried out at temperature ranging from 60 to 65 0C, while vacuum pressure ranging from 97.0 to 97.2 kPa. The drying process applied for solid materials e.g. cocoa and coffee beans where its moisture ranging from 27 to 35 %. It was found that energy efficiency by using the vacuum dryer was lower 5 % and the drying time tend to be faster 1 hour than using dryer with atmosphere pressure. Efficient use of energy and drying time are not optimal. It may be caused by the condition of the achievement of pressure in the chamber is still relatively high, so it still needs to develop particularly the design on the injector nozzles. In addition, there is still a lot of heat lost to the surroundings where this occurs, possibly due to improper thermal insulation.


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References


Coskun C., Bayraktar M., Oktay Z., Dincer I., (2009),Energy and Exergy Analyses of an Industrial Wood

Cips Drying Process, Int Journal Low-Carbon Tech 4 (4): 224-229.

Djaelani M. and A.J.B. Van Boxtel, 2014, Development of A Novel Energy- Efficient Adsorption Dryer with

Zeolite for Food Product, Drying Technology, vol. 25, issue 6; 1063-1077.

Davahastin, S., P. Suvarnakuta, S. Soponronnarit and A.S. Mujumdar, (2014), A comparative study of lowpressure

superheated steam and vacuum drying of a heat-sensitive material, Drying Technology, Vol. 22,

No 8, pp. 1845-1867.

Franck J. A. A.E., Gaston Z., Steve C. Z., Robert N., (2015), Optimization of drying parameters for mango,

seed kernels using central composite design, Bioresources and Bioprocessing 2:8 DOI 10.1186/s 40643-

-0036-x

Komolafe C.A, Adejumo A.O.D, Awogbemi O, Adeyeye A.D, 2014, Development of cocoa beans batch

dryer, American Journal of Engineering Research (AJER), Vol. 3 issue 9, pp 171-176.

Milly A. P., Zhongli P., Griffiths G. A., Gary S., James F. T. Drying characteristics and quality of bananas

under infrared radiation heating, (2013), Int J Agric & Biol Eng. Vol. 6 No.3.

Seveda M.C., (2012), Design and development of walk-In, Type of Hemi cylindrical solar tunnel dryer for

industrial use, Int. Scholar research Network, , Vol.2012.

Schmidt EL, Klocker K, Flacke N, Steimle F. (1998), Applying the transcritical CO2 process to a drying

heat pump, Int J Refrig, vol. 21.

Jia X, Jolly P, Clemets S. , (1990), Heat pump assisted continues drying. Part 2: simulation results, Int J

Energy Res, , vol. 14.

Van Boxtel, (2013), Processing and Drying of Foods, Vegetables and Fruits, Journal of Drying Technology ,

Vol 25.


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