王雅君,邱凌,赵立欣,葛一洪,郭晓慧,戴辰.热水循环加热厌氧反应器稳态数值模拟分析[J].农业机械学报,2016,47(10):209-214.
Wang Yajun,Qiu Ling,Zhao Lixin,Ge Yihong,Guo Xiaohui,Dai Chen.Steady-state Numerical Analysis of Anaerobic Reactor by Hot Water Circulating Heating[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(10):209-214.
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热水循环加热厌氧反应器稳态数值模拟分析   [下载全文]
Steady-state Numerical Analysis of Anaerobic Reactor by Hot Water Circulating Heating   [Download Pdf][in English]
投稿时间:2016-04-07  
DOI:10.6041/j.issn.1000-1298.2016.10.027
中文关键词:  厌氧发酵  稳态模拟  对流换热
基金项目:国家自然科学基金项目(51576167)、公益性行业(农业)科研专项(201503135)和农业部农村能源科技专项(2014—30)
作者单位
王雅君 西北农林科技大学 
邱凌 西北农林科技大学 
赵立欣 农业部规划设计研究院 
葛一洪 西北农林科技大学 
郭晓慧 西北农林科技大学 
戴辰 农业部规划设计研究院 
中文摘要:对于厌氧发酵系统,温度分布是否均匀是影响产气效率的关键因素。通过在10L厌氧反应器中分别对水和TS为12.4%(质量分数)的发酵料液进行加热的热平衡试验,运用Fluent软件对厌氧污泥传热特性进行仿真模拟,通过传感器监测温度变化,得出水的温度分布与高TS料液有很大差异,而且在没有搅拌装置的情况下进行高TS料液的传热仿真,不能将其物性参数默认为水。在对水进行传热仿真时发现,对于低TS料液进行仿真要考虑料液间的对流换热,因此需调用Boussinesq假设,调用该假设后,模拟与试验最大误差仅为4.2%。对换热管壁面厚度设置作出分析并得出:在Fluent中设置虚拟壁面与在Gambit中直接绘制壁面模型具有相同效果,而前者可以简化模型并减少计算时间。此外,在进行高TS仿真时发现最适合这种热水循环加热系统的湍流模型为可实现k—ε模型(Realizable k—ε)。
Wang Yajun  Qiu Ling  Zhao Lixin  Ge Yihong  Guo Xiaohui  Dai Chen
Northwest A&F University,Northwest A&F University,Chinese Academy of Agricultural Engineering,Northwest A&F University,Northwest A&F University and Chinese Academy of Agricultural Engineering
Key Words:anaerobic fermentation  steady-state simulation  heat transfer
Abstract:Temperature distribution has a great influence on the efficiency of gas production for anaerobic fermentation system. Fluent is one of the most advanced software for fluid simulation. It is suitable to apply it in simulation analysis of the anaerobic reactor without stirring. Two kinds of raw materials which were water and digested slurry with TS of 12.4% were applied in two 10L anaerobic reactors to conduct anaerobic fermentation experiments. Totally 16 temperature sensors were installed at each anaerobic reactor in order to detect temperature continuously. The temperature figures indicated that two types of materials were definitely different. Therefore, applying the Fluent heat transfer simulation to digested slurry anaerobic fermentation system cannot only utilize water as physical parameter. However, the error was only 4.2% between experiment with raw material of digested slurry with TS of 12.4% and Fluent simulation, when water and Boussinesq hypothesis were simultaneously defined as physical parameters. It was also explored that setting up a virtual wall in Fluent can dramatically simplify the model calculation time, and it had the same effect with defining real wall model in Gambit. In addition, it was found that realizable k—ε model was the most suited to the anaerobic fermentation system of digested slurry with high TS. The aims of the research were to explore suitable Fluent setting and optimization method for anaerobic fermentation and provide guidance for further work. Optimizing model and improving efficiency in unsteady-state numerical analysis will be the main body of the further work. 

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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