Energy and quality aspects for fixed deep bed drying of paddy

Mojtaba Tohidi, Morteza Sadeghi and Mehdi Torki-Harchegani

Renewable and Sustainable Energy Reviews, 2017, vol. 70, issue C, 519-528

Abstract: In this work, energy and quality attributes for deep bed drying of paddy were studied. Drying experiments of freshly harvested paddy were conducted at different levels of drying air parameters including temperature (T=40, 50, 60, 70 and 80°C), velocity (V=0.5, 0.8 and 1.1ms−1) and relative humidity (RH=40%, 50%, 60% and 70%). It was observed that increasing temperature and velocity increased drying rate and higher levels of relative humidity led to longer drying durations. Total energy consumption ranged from 0.37kWh to 1.85kWh where the minimum and maximum values belonged to the experiments carried out at T=80°C, V=0.5ms−1 and RH=40%, and T=40°C, V=1.1ms−1 and RH=70%, respectively. The results of energy analysis showed that the energy efficiency was improved at higher temperatures, and lower levels of velocity and relative humidity for drying air. Furthermore, it was found that the number of fissured kernels was directly related to drying rate where damaged kernels increased with increasing drying rate.

Keywords: Deep bed; Convective drying; Energy efficiency; Fissuring; Temperature (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (7)

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DOI: 10.1016/j.rser.2016.11.196

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