•  
  •  
 

Abstract

In order to solve the problem of temperature rise in heat pump drying rice in autumn. Two drying test scheme were been set, for the low temperature constant rate drying and variable wind speed drying. Both the total energy consumption and exergy analysis were been taken comparison of the drying process of rice. Experimental results show that the drying rate increases with wind speed and temperature go up in constant speed drying process. However, both the exergy efficiency and total energy consumption decrease with the increase of the wind speed. The total energy consumption of the variable wind speed drying is lower than that of the big constant wind speed experience groups. And the drying time is shorter than the small constant wind speed groups under the same temperature condition. The optimal parameters are obtained by experiment is that the first 7 hours the wind speed is 0.7 m/s, then 0.4 m/s. When the temperature is 45 ℃, the exergy efficiency is 44.05% and the temperature in 55 ℃ is 57.49%. It has a certain guiding significance for rice drying in southern china.

Publication Date

6-28-2016

First Page

95

Last Page

99

DOI

10.13652/j.issn.1003-5788.2016.06.022

References

[1] 吴苏喜, 刘瑞兴, 杨文风, 等. 低温循环式烘干机对南方高水分稻谷干燥的实践[J]. 食品与机械, 2011, 27(6): 192-194, 240.
[2] 罗乔军, 张进疆, 何琳, 等. 空气源热泵谷物干燥的研究进展[J]. 食品与机械, 2014, 30(3): 228-233.
[3] 胡连营. 热泵技术与可再生能源的开发利用[J]. 可再生能源, 2007, 25(1): 95-97.
[4] 徐建国, 徐刚, 顾震, 等. 低温热泵穿流干燥新鲜稻谷实验研究[J]. 食品工业科技, 2013(4): 228-231.
[5] 张艳来, 尹凯丹, 龙成树, 等. 热泵技术在我国农产品干燥中的应用及展望[J]. 农机化研究, 2014(5): 1-7.
[6] 吴耀森, 赵锡和, 刘清化, 等. 南方夏季稻谷热泵干燥特性研究[J]. 粮油加工: 电子版, 2014(1): 54-57.
[7] 张进疆, 刘清化, 吴耀森, 等. 农产品干燥加工节能减排工艺及装备研发[J]. 干燥技术与设备, 2010, 8(1): 4-8.
[8] 陈志峰, 闫泽生. 热泵干燥系统的火用分析[J]. 农机化研究, 2006(7): 77-79.
[9] 潘永康, 王喜忠, 刘相东. 现代干燥技术[M]. 北京: 化学工业出版社, 2006.
[10] 吴明亮, 汤楚宙. 稻谷爆腰机理及影响因素研究进展[J]. 粮油加工, 2006(2): 60-63.
[11] TEEBOONMA U, TIANSUWAN J, SOPONRONNARIT S. Optimization of heat pump fruit dryers[J]. Journal of Food Engineering, 2003(59): 369-377.
[12] KAVAK Akpinar E. Energy and exergy analyses of drying of eggplant slices in a cyclone type dryer[J]. Journal of Mechanical Science and Technology, 2003, 19(2): 692-703.

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.