Drying of turmeric (Curcuma longa) using heat pump dryer under different media

N. Seanmeema, N. Poomsa-ad, L. Wiset
The objective of this research was to investigate the drying of turmeric (Curcuma longa) by heat pump dryer (HPD) under a closed loop system using air, nitrogen and carbon dioxide gas as drying media. The drying temperatures of 45, 50 and 55°C were applied. The velocity of drying media in the drying chamber was 0.5 m s-1. The initial moisture content of 81% wet basis was dried down to 10% wet basis within 3, 2 and 1.5 h at drying temperatures of 45, 50 and 55°C, respectively. The drying rate was increased with drying temperatures. The drying under different media had similar drying rate at a given temperature. The coefficient of performance of the heat pump was in the range of 2.149-2.919.
Seanmeema, N., Poomsa-ad, N. and Wiset, L. (2018). Drying of turmeric (Curcuma longa) using heat pump dryer under different media. Acta Hortic. 1213, 333-338
DOI: 10.17660/ActaHortic.2018.1213.48
https://doi.org/10.17660/ActaHortic.2018.1213.48
coefficient of performance, carbon dioxide, herb, nitrogen
English

Acta Horticulturae