报告题目：（1）Renewable energy use in the UK: large-scale and small-scale；（2）Mathematical models for the van der Waals force and capillary force between a rough particle and surface

报告人：游思明 博士， 英国格拉斯哥大学讲师

邀请人：杨志兵 教授

时间：2018年9月4日（星期二）下午3:00

地点：国家重点实验室学术报告厅（农水楼一楼）

报告人简介：

       游思明，博士，2008年于北京航空航天大学获得学士学位，2014年获得新加坡南洋理工大学博士，2014-2015年在美国麻省理工学院从事博士后研究，2015-2017任职于新加坡国立大学环境研究所，2017年至今在英国格拉斯哥大学任讲师。

报告简介：

      The stability of wind, solar, geothermal, and biomass energy is a key factor for the design and integration of the renewable energy technologies. The energy output of these technologies are generally affected by a variety of external factors. It is critical to understand the relationships between the factors and the energy output of the technologies so that relevant prediction platforms could be developed for optimum energy utilization in Glasgow. The complementarity among the renewable technologies needs to be identified as well to facilitate the integration of the technologies. The first part of this talk deals with the optimization of the size and number of units of renewable energy systems in Glasgow based a two-phase multicriteria analysis. technical, economic, and environmental impacts of each type renewable energy sources in Glasgow size and number of units of renewable energy systems in Glasgow. The energy consumed by a net-zero energy building (NZEB) is as much as the renewable energy generated onsite or elsewhere. It is expected that NZEB will play an important role in mitigating greenhouse gas (GHG) emission and has received significant attention in recent years. Different routes or frameworks are available for the development of NZEB in terms of the types and combinations of renewable energy technologies. It is important to understand the economic feasibility of the routes for their practical implementation. The second part of this talk is about a preliminary cost-benefit analysis of the potential NZEB routes in the UK. The results will enable policymakers to make informed decisions for the fulfilment of NZEB in the UK.

      The capability of predicting the adhesion forces between a rough particle and surface including the van der Waals force and capillary force is important for modeling various processes involving particle surface retention and resuspension. On the basis of the fractal theory describing the behavior of multiple roughness scales and the Gaussian roughness distribution, a set of mathematical models for the van der Waals force and capillary force is proposed. The proposed models provide the adhesion force predictions in good agreement with the existing experimental data and converge to the previous classical solutions of the adhesion forces between a smooth particle and surface as the roughness goes to zero. The influences of roughness for the combination of particle and surface, relative humidity (RH), contact angle, and Hurst exponent toward the adhesion forces are examined using the proposed models. The decline mode of the adhesion force with surface roughness and contact angle, as well as the increase mode with RH and the Hurst exponent are reasonably predicted by the proposed models. The comparison between the proposed models and those from the existing studies is also performed, which shows the similarities and differences between the proposed models and the existing models.

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