首页 | 官方网站   微博 | 高级检索  
     

热盐水开采天然气水合物的热力学评价
引用本文:李刚,唐良广,黄冲,冯自平,樊栓狮.热盐水开采天然气水合物的热力学评价[J].化工学报,2006,57(9):2033-2038.
作者姓名:李刚  唐良广  黄冲  冯自平  樊栓狮
作者单位:中国科学院广州能源研究所天然气水合物研究中心,广东 广州 510640
基金项目:中国科学院方向性项目 , 中国科学院引进国外杰出人才基金
摘    要:将多孔介质中天然气水合物在热力作用下的分解过程看作一个移动边界问题,在求解等温边界条件下水合物地层中分解区和未分解区(水合物区)温度场的基础上,推导出热力法开采水合物过程中开采热效率(用于水合物分解的热量与输入热量之比)和能量效率(开采所得甲烷气体的总热值与输入能量之比)的解析表达式.在相同水合物地层条件下,对比注入热盐水(采用NaCl溶液)和热水两种开采方法,得出热盐水中盐的浓度(简称盐度)对开采热效率等的影响.计算结果表明,采用热盐水开采热效率一般在40%~70%.在开采温度300~450 K、盐度0~15%的条件下,热力法开采水合物的能量效率在7.4%~11.3%之间.

关 键 词:天然气水合物  热盐水  热效率  能量效率
文章编号:0438-1157(2006)09-2033-06
收稿时间:06 28 2005 12:00AM
修稿时间:2005-06-282005-10-24

Thermodynamic evaluation of hot brine stimulation for natural gas hydrate dissociation
LI Gang,TANG Liangguang,HUANG Chong,FENG Ziping,FAN Shuanshi.Thermodynamic evaluation of hot brine stimulation for natural gas hydrate dissociation[J].Journal of Chemical Industry and Engineering(China),2006,57(9):2033-2038.
Authors:LI Gang  TANG Liangguang  HUANG Chong  FENG Ziping  FAN Shuanshi
Affiliation:Center for Gas Hydrate Research, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong , China
Abstract:In order to evaluate the efficiency of producing gas from natural gas hydrate (NGH), NGH dissociation under thermal stimulation is treated as a moving-boundary problem.Based on a mathematical model assuming that dissociation of hydrate in the porous media takes place in constant temperature boundary condition,the analytical temperature distributions in dissociated and undissociated zones were solved, and thermal efficiency and energy efficiency were derived.A comparison of hot water injection case and brine injection case for the same heat injection rate showed higher thermal and energy efficiency for the brine case than the hot water case.Thermal efficiency was commonly 40%—70%. During dissociation of hydrate by injecting 300—450 K, 0—15%(mass) hot brine,energy efficiency varied between 7.4% and 11.3%. From this point of view, hot brine injection is a feasible and economical way of NGH production.
Keywords:natural gas hydrate  hot brine  thermal efficiency  energy efficiency
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《化工学报》浏览原始摘要信息
点击此处可从《化工学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号