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Performance Analysis of a Forced Convection Mixed Mode Horizontal Solar Cabinet Dryer for Drying of Black Ginger (Kaempferia Parviflora) using Two Successive Air Mass Flow Rates
Renewable Energy ( IF 8.7 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.renene.2020.01.035
Jasinta Poonam Ekka , Krishnendu Bala , P. Muthukumar , Dipak Kumar Kanaujiya

Abstract The main aim of this paper is to accelerate the drying process of black ginger in a forced convection mixed mode horizontal solar dryer (FCMHSD) by using two successive air mass flow rates. When the drying rate attains the falling rate period, air mass flow rate has minimal effect on drying rate. To diffuse bound moisture present in the product, air mass flow rate has to be reduced for raising the air temperature in the solar dryer. In this manuscript, two cases were considered for drying; Case – 1 with constant air mass flow rate of 0.062 kg/s and Case – 2 with two successive air mass flow rates of 0.062 kg/s during the initial period of drying and 0.018 kg/s during the falling rate period. The performance of FCMHSD was evaluated in terms of drying time, drying efficiency, specific energy consumption (SEC) and moisture diffusivity. The estimated SECs for Case – 1 and Case – 2 were 1.07 kWh/kg and 0.56 kWh/kg, respectively. A significant improvement in thermal performance and moisture diffusivity were observed when the FCMHSD operated under Case – 2 than under Case – 1. The use of two successive air mass flow rate is a new approach for accelerating the drying process.

中文翻译:

使用两个连续空气质量流量干燥黑姜(Kaempferia Parviflora)的强制对流混合模式卧式太阳能柜式干燥机的性能分析

摘要 本文的主要目的是通过使用两个连续的空气质量流量加速强制对流混合模式水平太阳能干燥机(FCMHSD)中黑姜的干燥过程。当干燥速率达到降速期时,空气质量流量对干燥速率的影响最小。为了扩散产品中存在的结合水分,必须降低空气质量流量以提高太阳能干燥机中的空气温度。在这份手稿中,考虑了两种情况进行干燥;案例 – 1 的恒定空气质量流量为 0.062 kg/s,案例 – 2 的两个连续空气质量流量在干燥初始阶段为 0.062 kg/s,在下降速率期间为 0.018 kg/s。从干燥时间、干燥效率、比能量消耗 (SEC) 和水分扩散率方面对 FCMHSD 的性能进行了评估。案例 1 和案例 2 的估计 SEC 分别为 1.07 kWh/kg 和 0.56 kWh/kg。当 FCMHSD 在案例 2 下运行时,与案例 1 相比,热性能和水分扩散率有显着改善。使用两个连续的空气质量流量是一种加速干燥过程的新方法。
更新日期:2020-06-01
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