Total Site Hydrogen Integration with fresh hydrogen of multiple quality and waste hydrogen recovery in refineries

This paper proposes a novel method combining Pinch Methodology and waste hydrogen recovery, aiming to minimise fresh hydrogen consumption and waste hydrogen discharge. The method of multiple-level resource Pinch Analysis is extended to the level of Total Site Hydrogen Integration by considering fresh hydrogen sources with various quality. Waste hydrogen after Total Site Integration is further regenerated. The technical feasibility and economy of the various purification approaches are considered, demonstrated with a case study of a refinery hydrogen network in a petrochemical industrial park. The results showed that fresh hydrogen usage and waste hydrogen discharge could be reduced by 21.3% and 67.6%. The hydrogen recovery ratio is 95.2%. It has significant economic benefits and a short payback period for Total Site Hydrogen Integration with waste hydrogen purification. The proposed method facilitates the reuse of waste hydrogen before the purification process that incurs an additional environmental footprint. In line with the Circular Economy principles, hydrogen resource is retained in the system as long as possible before discharge.     

High lithium storage of Co3O4 enabled by integrating hollow and porous carbon scaffolds

The Co₃O₄, as a potential anode of lithium-ion batteries, has gained considerable attention because of high theoretical capacity. However, the Co₃O₄ is suffering from serious structure deterioration and rapid capacity fading due to its bulky volume change during cyclic charge/discharge process. Herein, to stabilize the lithium storage performance of the Co₃O₄ nanoparticles, a characteristic carbon scaffold (HPC) integrating hollow and porous structures has been fabricated by a well-designed method for the first time. The ultrafine Co₃O₄ nanoparticles are cleverly anchored on the HPC (HPC@Co₃O₄) and hence achieve significantly improved electrochemical properties including high capacity, improved reaction kinetics and outstanding cycle stability, showing high capacity of 1084.7 mAh g^-1 after 200 cycles at 200 mA g^-1 as well as 681.4 mAh g^-1 after 300 cycles at 1000 mA g^-1. The HPC@Co₃O₄ therefore shows good promising for application in advanced lithium-ion battery anodes. The results of the systematically material and electrochemical characterizations indicate that the synergistic effects of ultrafine Co₃O₄ nanoparticles and well-designed HPC scaffolds are responsible for the outstand performance of the HPC@Co₃O₄ anode. Moreover, this work can enrich the understanding and development of stable and high-performance metal oxide-based lithium-ion battery anodes for advanced lithium storage.     

Assessing the Potential of Cross-border regional innovation Systems:A case study of the Hong Kong -Shenzhen region

While technological transformations have redrawn the boundaries of regional innovation systems, the effect of such transformations on the development of cross-border regional innovation systems (CBRISs) – defined here as the innovation system spanning neighboring territories belonging to different nation-states – has not been well understood. The Hong Kong-Shenzhen region presents a unique opportunity to study the potential of CBRISs, as Hong Kong and Shenzhen are adjacent to each other though there is a border between them and the two cities have their own political and legal systems under the “one country, two systems” arrangement. In this research, we examine the development of the Hong Kong-Shenzhen region by focusing on cognitive proximity, innovation actors, collaboration, and global connectivity through an analysis of patent and publication data for the 2001–2015 period. Our findings point to a good potential given the growing convergence in scientific research among the two cities, steadily increasing collaboration output, and a complementarity among innovation actors. However, compared with other cross-border regions, the technological linkages between Hong Kong and Shenzhen remain limited.     

Manufacturing of advanced smart tooling for metal forming

Forming is widely used due to its high efficiency in material utilization and its high production rate in general. Most forming processes control the geometry of final products through a set of tooling. The increasing demands on lightweight products have challenged the performances and functionalities of tooling. This paper provides a systematic review of recent advancements related to tooling performance and functionalities, including tool materials, tooling fabrication processes (e.g., machining, heat treatment, coating, surface texturing, and additive manufacturing), sensing, and data analytics. Finally, recommendations on future research directions for metal forming tooling are provided.     

深邃的平行线与文脉的传承——南平市文博园建筑方案设计

通过对南平市文博园博物馆的设计实践,从空间设计、平面布局、细部设计等方面阐述建筑功能、内涵、造型三者之间的关系,论述建筑设计中现代主义与地域文化传承之间的关系。     

整合理念在建筑、环境设计的应用——中铁科技大厦设计

介绍了在"整合理念"指导下的武汉中铁科技大厦项目设计实践,指出在当前建筑设计与建筑技术要求的前提下,努力倡导建筑与环境相互融合,探索建筑和环境设计的整合之路。     

医学中心规划趋势探讨

本文依据笔者近20年来的医院规划实务操作与医学空间研究,归纳出对大型医学中心(medical center)之空间规划设计理念及使用后评估观察成果,借由对医院空间特性之分析,提出可变与不可变之医院空间组织系统的建立原则,期待以更先进之医疗建筑来保障健康。     

湖北大学图书馆创作构思

在湖北大学图书馆创作中,注意了功能性与前沿性的并重,传统文化与现代技术的相融,既体现了现代图书馆理念和个性,又使之具有较强的文化气息和时代特征,进行一次理性与感性的整合。     

北京市公共交通一体化规划研究

北京市公共交通目前存在可靠性低、准点性差、线网布局不合理、换乘不方便、路权分配不合理、票制票价不统一的问题,应发展公共交通一体化.公共交通一体化规划应从线网换乘、公交设施、票制票价及体制政策四个方面实现一体化,并注重公共交通与步行系统、自行车交通、小汽车交通的衔接设计,以构建一个分区、分级、分层的一体化综合城市公共交通系统.     

试论校园规划的整体性与延续性——以常州市戚墅堰区实验中学规划设计为例

在中学校园规划中引入了整体性与延续性的设计理念，并指出整体性是校园建筑在空间上的一体化而延续性则是校园建筑在时间上的传承性。该文以常州市戚墅堰区实验中学的规划设计为例，进一步探讨了整体性与延续性理念在实践中的应用.