| 摘要: |
| 本文针对无静压层无变截面、有静压层无变截面、有静压层有变截面（角度分别为arctan (3/40)、arctan (1/10)、arctan (1/8)）5种热泵干燥舱结构，在改变4种入口风速（1.50、2.00、2.50和3.00 m/s）的情况下，对热质交换区内的速度场情况进行了对比实验，得出最优结构。对于该最优结构，在改变3种送风温度（40、50和60℃）的情况下，对其温度场进行分析，校核最优结构的适宜温度范围。结果表明：有静压层且变截面角度为arctan (1/10)的结构最优，推荐入口风速为2.50 m/s，适宜送风温度范围较宽，可根据被干燥物料设定。 |
| 关键词: 热泵干燥舱 实验分析 速度场 温度场 |
| DOI： |
| Received:October 30, 2017Revised:March 20, 2018 |
| 基金项目:南京市软科学研究计划（201706044）资助项目。 |
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| Experimental Analysis of the Thermal Performance of a Drying Chamber with Variable-section Configuration for Heat Pump Drying |
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Cai Dandan, Yao Yuchen, Zhang Zhongbin, Chen Zhiming, Huang Hu
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| (Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, School of Energy and Mechanical Engineering, Nanjing Normal University) |
| Abstract: |
| The velocity field in the area of heat and mass transfer in a drying chamber of heat pump was investigated experimentally and an optimal configuration was determined. Four kinds of inlet velocity (1.50, 2.00, 2.50, and 3.00 m/s) were used and five kinds of chamber structures, i.e., no static pressure layer and no variable cross section, with a static pressure layer but no variable cross section, with both static pressure layer and variable cross section whose angles were arctan (3/40), arctan (1/10), and arctan (1/8) respectively, were compared. Furthermore, the suitable inlet temperature range for the optimized structure was investigated by changing the inlet temperature (40, 50, and 60 ?C). The results show that the structure with both static pressure layer and variable cross section whose angle was arctan (1/10) was the optimal and the inlet velocity was recommended as 2.50 m/s. The inlet temperature can be determined using the dried materials because the suitable inlet temperature range is large. |
| Key words: drying chamber for heat pump experimental analysis velocity field temperature field |
