石惠娴,徐得天,朱洪光,孟祥真,苗慧,黄超.沼气发酵池动态热负荷特性研究[J].农业机械学报,2017,48(5):296-303.
SHI Huixian,XU Detian,ZHU Hongguang,MENG Xiangzhen,MIAO Hui,HUANG Chao.Dynamic Thermal Load Characteristics in Anaerobic Digester[J].Transactions of the Chinese Society for Agricultural Machinery,2017,48(5):296-303.
摘要点击次数: 2294
全文下载次数: 946
沼气发酵池动态热负荷特性研究   [下载全文]
Dynamic Thermal Load Characteristics in Anaerobic Digester   [Download Pdf][in English]
投稿时间:2016-12-28  
DOI:10.6041/j.issn.1000-1298.2017.05.037
中文关键词:  沼气工程  发酵池  动态热负荷  逐时累加法
基金项目:国家高技术研究发展计划(863计划)项目(2013AA103006—02)
作者单位
石惠娴 同济大学 
徐得天 同济大学 
朱洪光 同济大学 
孟祥真 同济大学 
苗慧 同济大学 
黄超 同济大学 
中文摘要:温度是影响沼气发酵产气率的关键因素,发酵池的热负荷是沼气工程加温系统设计与选型的基础,关系到发酵系统的稳定运行与加温系统的经济性。精确计算出发酵池热负荷,有利于将加温系统供能侧与发酵池需能侧匹配,并探索出加温系统的最佳系统配置和运行策略,以降低能耗和成本。在分析沼气工程发酵设备物理和数学模型基础上,采用逐时累加法计算发酵池围护结构散热量,得到发酵池热负荷的全年动态变化规律,将稳态算法的时间步长由1个月缩短到1h,提高了计算精度。研究结果表明,在(25±1)℃、(30±1)℃和(35±1)℃ 3种不同工况下,热负荷的模型计算结果与试验测量结果相对误差分别为-5.98%、3.93%和5.39%,对于沼气工程保温和增温设计具有一定的理论意义和参考价值。
SHI Huixian  XU Detian  ZHU Hongguang  MENG Xiangzhen  MIAO Hui  HUANG Chao
Tongji University,Tongji University,Tongji University,Tongji University,Tongji University and Tongji University
Key Words:biogas engineering  digester  dynamic heat load  hourly accumulation calculation
Abstract:Temperature is the critical factor affecting biogas production rate. Anaerobic digester is the heating object in biogas engineering, the heat load of fermentation tank is the basis of biogas project design and selection of heating system, which is related to the stability of anaerobic digest system and economy of heating system. Therefore, it is vital to define the heat load characteristics of the fermentation tank. The average temperature of the fermentation tank was calculated, and then the digester’s heating load was figured out, the maximum value was regarded as the system’s thermal load. This method was simple, however, which made the result deviated practical situation greatly. To accurately calculate the heat load of the fermentation tank, it was advantageous to match the heating system with the fermentation tank, and explore the optimal system configuration and operation strategy of the heating system in order to reduce the energy consumption and cost. The hourly meteorological parameters of special meteorological data set for analysis of thermal environment of building in China in the Shanghai area was used, based on the analysis of physical and mathematical model of fermentation of biogas project, the hourly accumulation of fermentation pool enclosure structure heat dissipation was calculated, and annual dynamic changes of fermentation pool heat load was obtained, which can be used to guide the design of heating system of fermentation tank. The essence of this method was to make steady algorithm time step shortened from a month to 1h, which enhanced the calculation precision obviously. Results showed that under the three different conditions, the relative errors of heat load model and experimental measurement were -5.98%, 3.93% and 5.39%, respectively. Thus, dynamic heat load model was of high precision, and it was acceptable to be applied to guide engineering design and operation, avoid the long time operation of the system under partial load, which had theoretical significance and reference value for the design and operation of biogas engineering.

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.

   下载PDF阅读器