变截面热泵干燥舱热环境性能实验分析
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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,改变入口风速(1.50、2.00、2.50和3.00 m/s),对热质交换区内的速度场进行对比实验,得出最优结构。对于该最优结构,改变送风温度(40、50和60℃),分析其温度场,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。
For five configurations of drying chamber for heat pump structure with no static pressure layer and no variable cross-section, structure with static pressure layer but no variable cross-section, structure with both static pressure layer and variable cross-section(whose angles are arctan(3/40), arctan(1/10), arctan(1/8) respectively), velocity field in the area for heat and mass exchange is studied by changing inlet velocity(1.50, 2.00, 2.50, 3.00 m/s) so that drying chamber with the optimal configuration is figured out. Futhermore, the suitable inlet temperature range of the optimized structure is checked by changing inlet temperature(40, 50, 60 ℃). It turns out that structure with both static pressure layer and variable cross-section whose angle is arctan(1/10) is optimal and 2.50 m/s is recommended as its inlet velocity while its inlet temperature can be determined by dried materials for its suitable inlet temperature range is large.
For five configurations of drying chamber for heat pump structure with no static pressure layer and no variable cross-section, structure with static pressure layer but no variable cross-section, structure with both static pressure layer and variable cross-section(whose angles are arctan(3/40), arctan(1/10), arctan(1/8) respectively), velocity field in the area for heat and mass exchange is studied by changing inlet velocity(1.50, 2.00, 2.50, 3.00 m/s) so that drying chamber with the optimal configuration is figured out. Futhermore, the suitable inlet temperature range of the optimized structure is checked by changing inlet temperature(40, 50, 60 ℃). It turns out that structure with both static pressure layer and variable cross-section whose angle is arctan(1/10) is optimal and 2.50 m/s is recommended as its inlet velocity while its inlet temperature can be determined by dried materials for its suitable inlet temperature range is large.
引文
[1] NGUYEN D D, 李保国, 薛雅萌. 木鳖果热泵低温干燥工艺研究[J]. 制冷学报,2014,35(6):109-113.(NGUYEN D D, LI Baoguo, XUE Yameng. Study on heat pump low temperature drying of momordica fruit[J]. Journal of Refrigeration, 2014, 35(6):109-113.)
[2] MARTíNEZ-NIETO P, GARCíA-GóMEZ G, MORA-ORTIZ L, et al. Polluting macrophytes Colombian lake Fúquene used as substrate by edible fungus Pleurotus ostreatus[J]. World Journal of Microbiology & Biotechnology, 2014, 30(1):198-203.
[3] SHI Qilong,ZHENG Yaqin,ZHAO Ya. Drying characteristics and quality of yacon (smallanthus sonchifolius) during heat pump drying[J]. Food Science, 2014, 35(3):16-22.
[4] 师建芳, 吴中华, 刘清, 等. 不同进风方案下隧道烘干窑热风流场 CFD 模拟和优化[J]. 农业工程学报, 2014, 30(14):315-321.(SHI Jianfang, WU Zhonghua, LIU Qing, et al. CFD simulation and optimization of airflow field in industrial tunnel dryer with different blowing designs[J]. Transactions of the Chinese Society of Agricultural Engineering, 2014, 30(14):315-321.)
[5] RANJBARAN M, EMADI B, ZARE D. CFD simulation of deep-bed paddy drying process and performance[J]. Drying Technology, 2014, 32(8):919-934.
[6] 王雪芹, 刘宝林, 闫静文. 卷心菜真空冷却过程的CFD传热传质模拟[J]. 制冷学报, 2012, 33(1):65-68.(WANG Xueqin, LIU Baolin, YAN Jingwen. CFD simulation of heat and mass transfer during vacuum cooling process for cabbage[J]. Journal of Refrigeration, 2012, 33(1):65-68.)
[7] 夏在超, 李建新, 高德, 等. 几何结构对喷射器性能影响的CFD分析及实验研究[J]. 制冷学报, 2014, 35(3):45-49.(XIA Zaichao, LI Jianxin, GAO De, et al. CFD analysis and experimental study on the effect of geometries for the performance of an ejector[J]. Journal of Refrigeration, 2014, 35(3):45-49.)
[8] YANG C, DUAN Y. CFD-DEM model for simulating solid exchange in a dual-leg fludized bed[J]. Chemcial Engineering & Technology, 2013, 36(11):1907-1914.
[9] RANGARAJAN D, CURTIS J S, BENYAHIA S, et al. Continuum model validation of gas jet plume injection into a gas-solid bubbling fluidized bed[J]. Aiche Journal, 2013, 59(9):3247-3264.
[10] PUA C K, HAMID N S A, TAN C P, et al. Optimization of drum drying processing parameters for production of jackfruit (Artocarpus heterophyllus) powder using response surface methodology[J]. LWT-Food Science and Technology, 2010, 43(2):343-349.
[11] 李超新, 张学军, 刘松, 等. 百叶窗在热风干燥中的应用与数值模拟[J]. 中国农机化学报, 2015, 36(1):165-167.(LI Chaoxin, ZHANG Xuejun, LIU Song, et al. Application and numerical simulation of the louver blades in hot air drying [J]. Journal of Chinese Agricultural Mechanization, 2015, 36(1): 165-167.)
[12] OZAHI E, DEMIR H. Presentation of a test rig with its experimental procedure and uncertainty analysis of measurements for batch type fluidized bed drying of corn and unshelled pistachio nut[J]. Measurement, 2014, 53(5):117-127.
[13] 张忠斌, 黄虎, 杜垲, 等. 隔板装置对恒温水箱的性能影响分析(2)试验验证[J]. 太阳能学报, 2016, 37(3):651-657.(ZHANG Zhongbin, HUANG Hu, DU Kai, et al. Effect of baffle configurations on the performance of thermostatic water tank(2) experimental verification[J]. Acta Energiae Solaris Sinica, 2016, 37(3):651-657.)
[14] 郑硕, 李明滨, 慕松. 枸杞热风对流干燥动力学特性的研究与试验[J]. 食品工业, 2012(9):143-146.(ZHENG Shuo, LI Mingbing, MU Song. Study and experiment on chinese wolfberry drying dynamic characteristics in the condition of hot air convection[J]. The Food Industry, 2012(9):143-146.)
[15] 李强, 翁卫兵, 房殿军, 等. 公路冷藏运输车厢内三场协同性三维数值模拟与试验[J]. 农业机械学报, 2014, 45(12):241-248.(LI Qiang, WENG Weibing, FANG Dianjun, et al. Three-dimensional numerical simulation and experiment of three fields cooperative in refrigerated road transport carriage[J]. Transactions of the Chinese Society of Agricultural Machinery, 2014, 45(12):241-248.)
[16] YU Pinging, ZHU Keqian, SHI Qiang, et al. Transient heat transfer characteristics of small jet impingement on high-temperature flat plate[J]. International Journal of Heat and Mass Transfer, 2017, 114:981-991.
[17] 陆锐, 谭鹤群, 黄正明. 立式干燥机干燥单元风速场均匀性的研究[J]. 湖北农业科学, 2013, 52(2):435-439.(LU Rui, TAN Hequn, HUANG Zhengming. Study on the uniformity of velocity field in chamber of vertical dryer[J]. Hubei Agricultural Sciences, 2013, 52(2):435-439.)
[18] 全国法制计量技术委员会.通用计量术语和定义:JJF1001—1998[S]. 北京:中国计量出版社, 1998.(National Legal Metrology Technical Committee. Universal metrology terms and definitions: JJF1001—1998 [S]. Beijing: China Metrology Publishing House, 1998.)
[19] 全国法制计量技术委员会.测量不确定度评价与表示:JJF1059—1999[S]. 北京:中国计量出版社,1999. (National Legal Metrology Technical Committee. Evaluation and representation of measurement uncertainty: JJF1059-1999[S]. Beijing: China Metrology Publishing House, 1999.)
[20] 李小燕, 钟志锋, 王磊,等. 基于第二制冷剂量热器法的压缩机制冷量测量不确定度分析[J]. 流体机械, 2015, 43(2):32-36.(LI Xiaoyan, ZHONG Zhifeng, WANG Lei, et al. Uncertainty analysis for compressor refrigerating capacity measurement based on secondary fluid calorimeter method[J]. Fluid Machinery, 2015,43(2):32-36.)
[2] MARTíNEZ-NIETO P, GARCíA-GóMEZ G, MORA-ORTIZ L, et al. Polluting macrophytes Colombian lake Fúquene used as substrate by edible fungus Pleurotus ostreatus[J]. World Journal of Microbiology & Biotechnology, 2014, 30(1):198-203.
[3] SHI Qilong,ZHENG Yaqin,ZHAO Ya. Drying characteristics and quality of yacon (smallanthus sonchifolius) during heat pump drying[J]. Food Science, 2014, 35(3):16-22.
[4] 师建芳, 吴中华, 刘清, 等. 不同进风方案下隧道烘干窑热风流场 CFD 模拟和优化[J]. 农业工程学报, 2014, 30(14):315-321.(SHI Jianfang, WU Zhonghua, LIU Qing, et al. CFD simulation and optimization of airflow field in industrial tunnel dryer with different blowing designs[J]. Transactions of the Chinese Society of Agricultural Engineering, 2014, 30(14):315-321.)
[5] RANJBARAN M, EMADI B, ZARE D. CFD simulation of deep-bed paddy drying process and performance[J]. Drying Technology, 2014, 32(8):919-934.
[6] 王雪芹, 刘宝林, 闫静文. 卷心菜真空冷却过程的CFD传热传质模拟[J]. 制冷学报, 2012, 33(1):65-68.(WANG Xueqin, LIU Baolin, YAN Jingwen. CFD simulation of heat and mass transfer during vacuum cooling process for cabbage[J]. Journal of Refrigeration, 2012, 33(1):65-68.)
[7] 夏在超, 李建新, 高德, 等. 几何结构对喷射器性能影响的CFD分析及实验研究[J]. 制冷学报, 2014, 35(3):45-49.(XIA Zaichao, LI Jianxin, GAO De, et al. CFD analysis and experimental study on the effect of geometries for the performance of an ejector[J]. Journal of Refrigeration, 2014, 35(3):45-49.)
[8] YANG C, DUAN Y. CFD-DEM model for simulating solid exchange in a dual-leg fludized bed[J]. Chemcial Engineering & Technology, 2013, 36(11):1907-1914.
[9] RANGARAJAN D, CURTIS J S, BENYAHIA S, et al. Continuum model validation of gas jet plume injection into a gas-solid bubbling fluidized bed[J]. Aiche Journal, 2013, 59(9):3247-3264.
[10] PUA C K, HAMID N S A, TAN C P, et al. Optimization of drum drying processing parameters for production of jackfruit (Artocarpus heterophyllus) powder using response surface methodology[J]. LWT-Food Science and Technology, 2010, 43(2):343-349.
[11] 李超新, 张学军, 刘松, 等. 百叶窗在热风干燥中的应用与数值模拟[J]. 中国农机化学报, 2015, 36(1):165-167.(LI Chaoxin, ZHANG Xuejun, LIU Song, et al. Application and numerical simulation of the louver blades in hot air drying [J]. Journal of Chinese Agricultural Mechanization, 2015, 36(1): 165-167.)
[12] OZAHI E, DEMIR H. Presentation of a test rig with its experimental procedure and uncertainty analysis of measurements for batch type fluidized bed drying of corn and unshelled pistachio nut[J]. Measurement, 2014, 53(5):117-127.
[13] 张忠斌, 黄虎, 杜垲, 等. 隔板装置对恒温水箱的性能影响分析(2)试验验证[J]. 太阳能学报, 2016, 37(3):651-657.(ZHANG Zhongbin, HUANG Hu, DU Kai, et al. Effect of baffle configurations on the performance of thermostatic water tank(2) experimental verification[J]. Acta Energiae Solaris Sinica, 2016, 37(3):651-657.)
[14] 郑硕, 李明滨, 慕松. 枸杞热风对流干燥动力学特性的研究与试验[J]. 食品工业, 2012(9):143-146.(ZHENG Shuo, LI Mingbing, MU Song. Study and experiment on chinese wolfberry drying dynamic characteristics in the condition of hot air convection[J]. The Food Industry, 2012(9):143-146.)
[15] 李强, 翁卫兵, 房殿军, 等. 公路冷藏运输车厢内三场协同性三维数值模拟与试验[J]. 农业机械学报, 2014, 45(12):241-248.(LI Qiang, WENG Weibing, FANG Dianjun, et al. Three-dimensional numerical simulation and experiment of three fields cooperative in refrigerated road transport carriage[J]. Transactions of the Chinese Society of Agricultural Machinery, 2014, 45(12):241-248.)
[16] YU Pinging, ZHU Keqian, SHI Qiang, et al. Transient heat transfer characteristics of small jet impingement on high-temperature flat plate[J]. International Journal of Heat and Mass Transfer, 2017, 114:981-991.
[17] 陆锐, 谭鹤群, 黄正明. 立式干燥机干燥单元风速场均匀性的研究[J]. 湖北农业科学, 2013, 52(2):435-439.(LU Rui, TAN Hequn, HUANG Zhengming. Study on the uniformity of velocity field in chamber of vertical dryer[J]. Hubei Agricultural Sciences, 2013, 52(2):435-439.)
[18] 全国法制计量技术委员会.通用计量术语和定义:JJF1001—1998[S]. 北京:中国计量出版社, 1998.(National Legal Metrology Technical Committee. Universal metrology terms and definitions: JJF1001—1998 [S]. Beijing: China Metrology Publishing House, 1998.)
[19] 全国法制计量技术委员会.测量不确定度评价与表示:JJF1059—1999[S]. 北京:中国计量出版社,1999. (National Legal Metrology Technical Committee. Evaluation and representation of measurement uncertainty: JJF1059-1999[S]. Beijing: China Metrology Publishing House, 1999.)
[20] 李小燕, 钟志锋, 王磊,等. 基于第二制冷剂量热器法的压缩机制冷量测量不确定度分析[J]. 流体机械, 2015, 43(2):32-36.(LI Xiaoyan, ZHONG Zhifeng, WANG Lei, et al. Uncertainty analysis for compressor refrigerating capacity measurement based on secondary fluid calorimeter method[J]. Fluid Machinery, 2015,43(2):32-36.)