Thermal characteristics of heat pump dryer for ginger drying

被引：54
|
作者：
Chapchaimoh, Khanuengnit [1 ]
Poomsa-ad, Nattapol [1 ]
Wiset, Lamul [1 ]
Morris, John [1 ]
机构：
[1] Mahasarakham Univ, Fac Engn, Kantarawichai 44150, Maha Sarakham, Thailand
来源：
APPLIED THERMAL ENGINEERING | 2016年 / 95卷
关键词：
Closed system; Energy consumption; Ginger; Heat pump dryer; Thermal characteristics; NITROGEN; RHIZOMES; LIGNITE; ENERGY;
D O I：
10.1016/j.applthermaleng.2015.09.025
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
We discuss the drying performance and energy consumption of a closed system heat pump dryer for ginger drying at 50 degrees C within 200 minutes using air and nitrogen as the drying medium. The fresh ginger at moisture content of 777 was dried by air and nitrogen down to 132 and 89% dry basis. The gained heat at the internal condenser was 15.4 and 20.5 MJ, and rejected heat at evaporator was 18.6 and 22.9 MJ for air and nitrogen cycles, respectively. Heater provided 62.93 and 65.60% total input energy of refrigerant cycle while heat gained at external condenser were 37.92 and 28.79% output for air and nitrogen drying respectively. Air drying required total input energy of 11.6 compared to nitrogen of 12.5 MJ. Specific moisture extraction rate of ginger drying in air was 0.06, while nitrogen was 0.07 kg water/MJ. Specific energy consumption of air drying was 16.67 while nitrogen was 14.29 MJ/kg water. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：491 / 498
页数：8
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