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美国工程院院士Michael Celia教授访问港大土木工程系 精选

已有 3932 次阅读 2017-5-1 21:44 |系统分类:人物纪事

美国工程院院士Michael Celia教授

访问港大土木工程系

岳中琦

美国工程院院士Michael Celia教授近期访问了香港大学土木工程系。Celia院士现任普林斯顿大学工程土木与环境工程系教授和环境工程与水资源专项主任。他曾在2005年到2011年任系主任。

在访问期间,Celia院士在香港大学做了一场公众学术报告。报告题目是“Energy and Sustainability in a Carbon-constrained World”。他在报告中指出,2016年是标志人类无情地改变地球状况的里程碑:在2016年整年期间,大气中二氧化碳CO2的含量都是在百万分之400之上。这个浓度比工业革命前大气CO2含量增大了45%,导致了地球快速增温,不能可持续发展。

另外,Celia院士在港大土木工程系做了两场专业报告。题目分别为,“Models for Fluid Flow in Shale Gas Reservoirs”和“Modeling Geological Storage of Carbon Dioxide with a Focus on Groundwater Protection”。Celia院士认为,美国自2010年以来页岩油气开采快速增长,已经占甲烷天然气总产量的一半以上,这使得美国能源独立,且能够控制或左右世界油气产量与价格。美国已经钻了9千多口页岩气井,且有1万6千多口页岩气井已经被批准随时随需开钻。

Celia院士观察到,页岩气开采需要向每口开采井内,高压注射2万多立方米水,用水力来致破裂完整页岩,但是,仅有30%注入的水能够随着页岩气的开采,从井口回流到地面。换句话讲,70%注入的水进入地层。那么,需要知道,大量注入的水流动到哪里储存了呢?对此现象,他做了模拟计算研究。

在第二场报告中,Celia院士认为,注入CO2到地下深部含盐水地层永久储存,依然是降低碳排放到大气的好办法。过去对这个方法曾抱有较大的希望。现在,它的使用进展缓慢。最主要因素是缺乏碳排放到大气的费用定价。用煤等发电厂会集中产生大量CO2,他们用责任把CO2捕获、处理妥当。他认为,中国将来可以在建立碳排放价格和CO2地下永久储存起到关键作用。

Celia院士的个人英文介绍可参见附件。

Celia的访问和三场学术报告等交谈,让我对美国页岩气开采、碳排放、碳储存和世界能源等议题有了详细的了解和认识。我十分感谢他。

2017年5月1日21:10写成于香港大学602办公室

附件:Michael Celia教授的个人简历介绍

Professor Michael Celia is the Theodora Shelton Pitney Professor of Environmental Studies and Professor of Civil and Environmental Engineering at Princeton University, where he served as Department Chair for the CEE Department from 2005 to 2011.  He is currently Director of the Program in Environmental Engineering and Water Resources, and will become Director of the Princeton Environmental Institute on 1 July 2017.  Professor Celia's areas of research include ground-water hydrology, multi-phase flow in porous media, numerical modeling,and subsurface energy systems with a focus on geological sequestration of carbon dioxide and shale-gas systems. Ongoing projects include development of new simulation tools to model CO2 injection, migration, and possible leakage associated with carbon capture and geological sequestration (CCS); studies of multi-phase flow and transportin porous media with a focus on multi-scale models, including pore-scalemodels; modeling of shale-gas systems with a focus on possible CO2 injectioninto depleted shale-gas reservoirs as well as the fate of fracking fluids; and measurements of methane leakage to the atmosphere along old oil and gas wells.  The CCS work is part of a large industry-funded multi-disciplinary effort at Princeton known as the Carbon Mitigation Initiative.  Professor Celia served for 10 years as editor of the Journal Advances in Water Resources.  He is a Fellow of the American Geophysical Union (AGU) and the American Association for the Advancement of Science (AAAS)and the recipient of the 2005 AGU Hydrologic Sciences Award (citation: For fundamental research contributions to subsurface hydrology and numerical methods in water resources, and for providing a model of Academia at its best).  He was the 2008 Darcy Lecturer for the National Ground Water Association, the 2010 Pioneers in Groundwater lecturer for the American Society of Civil Engineers, received the 2012 Hydrology Days Award, and is the recipient of the 2014 Honorary Lifetime Membership Award from the International Society for Porous Media (Interpore).  In 2016 Professor Celia was elected to the U.S. National Academy of Engineering (citation: For contributions to the development of subsurface flow and transport models in groundwater remediation and CO2 sequestration).




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