Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Design of Tunnel Drier for the Non-centrifugal Sugar Industry

Version 1 : Received: 12 February 2020 / Approved: 13 February 2020 / Online: 13 February 2020 (12:54:49 CET)

How to cite: Raj, S.; Sravya, B.; Srinivas, M.; Reddy, K. Design of Tunnel Drier for the Non-centrifugal Sugar Industry. Preprints 2020, 2020020172 (doi: 10.20944/preprints202002.0172.v1). Raj, S.; Sravya, B.; Srinivas, M.; Reddy, K. Design of Tunnel Drier for the Non-centrifugal Sugar Industry. Preprints 2020, 2020020172 (doi: 10.20944/preprints202002.0172.v1).

Abstract

The quality and shelf-life of NCS (Non-centrifugal sugar) mainly depend on the moisture content present in it. NCS formed by the current practice of open sun drying contains moisture substantially greater than the acceptable level of 3%. This paper presents the work taken up to design a tunnel dryer to attain require moisture content in granular NCS for various load conditions. Initially, an experimental investigation had been carried out on a laboratory scale dryer to achieve required moisture content (< 3%) for various load conditions. This experimental data was used for validating two drying models and found that one of the models is best suitable for designing an industrial-scale dryer. For various load conditions on each tray and dryer exit temperature, nine different cases were arrived at. The number of trucks, trays, drying time and energy requirements were computed using the suitable theoretical model. Tunnel dryer with a length of 18 m, a height of 1.2 m, a width of 1 m, number of trucks of 18 and 24 number of trays on each truck was found to be the suitable dryer to dry 1 tone of NCS based on the minimum energy requirement of 176.49 MJ, and a minimum drying time of 68 minutes.

Subject Areas

Non-centrifugal sugar; drying; tunnel dryer

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