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Feasibility of Applying Conductive Heat and Convective Heat to the Drying Process of Safe Solar Salt

  • Jae-woong Han
  • Woong Kim
  • Hyo-Jai LeeEmail author
Original Article
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Abstract

This study investigated drying characteristics for the production of safe solar salt. The drying characteristics were measured and analyzed at 10-min intervals by drying at 50, 75, and 100 °C for approximately 30 min using three dry heat sources, such as conductive heat (hereafter CDH), convective heat (hereafter CVH), and conductive and convective heat (hereafter CDCVH). The characteristics measured were moisture content, salinity, whiteness, b* (yellowness), and energy consumption. Moisture content tends to decrease with increasing drying time. In particular, the drying rate of the drying method using CDCVH was most rapid (1.22%, w.b./h). The deviation of the moisture content was further increased by using the CVH method. Salinity and whiteness were not significantly different for every experiment. Otherwise, the deviation of the b* value of the drying experiment using the CDCVH was largest. Energy consumption using the CVH method was similar to the drying method using CDCVH, but the cost of the heat generator for the drying method using the CDCVH was more expensive. Therefore, considering the deviation of moisture content after drying, the cost of the heat generator, and the change of the appearance quality (b* value), the drying method using the CVH was most suitable.

Keywords

Conductive heat Convective heat Salinity Whiteness Moisture content Safe solar salt 

Notes

Funding Information

This study was supported by grant 20130290, awarded to the Solar Salt Research Center of Mokpo, National University, from the Ministry of Oceans and Fisheries, Korea.

Compliance with Ethical Standards

Conflict of Interest

The authors declare that they have no conflict of interest.

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Copyright information

© The Korean Society for Agricultural Machinery 2019

Authors and Affiliations

  1. 1.Department of Bio-industry Mechanical EngineeringKongju National UniversityYesanRepublic of Korea

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