Yun Wang – författare

Water and Thermal Management of Proton Exchange Membrane Fuel Cells introduces the main research methods and latest advances in the water and thermal management of PEMFCs. The book introduces the transport mechanism of each component, including modeling methods at different scales, along with practical exercises. Topics include PEMFC fundamentals, working principles and transport mechanisms, characterization tests and diagnostic analysis, the simulation of multiphase transport and electrode kinetics, cell-scale modeling, stack-scale modeling, and system-scale modeling. This volume offers a practical handbook for researchers, students and engineers in the fields of proton exchange membrane fuel cells.

Proton exchange membrane fuel cells (PEMFCs) are high-efficiency and low-emission electrochemical energy conversion devices. Inside the PEMFC complex, physical and chemical processes take place, such as electrochemical reaction, multiphase flow and heat transfer. This book explores these topics, and more.

Introduces the transport mechanism for each component of PEMFCs Presents modeling methods at different scales, including component, cell, stack and system scales Provides exercises in PEMFC modeling, along with examples of necessary codes Covers the latest advances in PEMFCs in a convenient and structured manner Offers a solution to researchers, students and engineers working on proton exchange membrane fuel cells

Fuel Cells for Transportation: Fundamental Principles and Applications is the first comprehensive reference on the application of fuel cells for light- and heavy-duty transportation. Addressing the subject from both a materials and engineering perspective, the book examines integration, modeling, and optimization of fuel cells from fundamentals to the latest advances. Chapters address every aspect of fuel cell systems for transport applications, including performance optimization, stack characterization, low-cost materials and catalysts, design of bipolar plates and flow fields, water and thermal management, durability under automotive driving cycles, cold start, state of the art characterization, optimization of various components, and more.

Each chapter reviews the fundamental principles of the topic before going on to examine the latest developments alongside current applications and real-world case studies. This is an essential reference for graduate students and researchers working on fuel cells for transport applications, as well as professional engineers involved in the application of fuel cells and clean energy and working in any sector of the transportation industry.

Presents a comprehensive examination of the technologies, integration and application of fuel cells for transportation, from the fundamentals to the latest advances Examines the latest challenges, market outlooks and targets for fuel cells in light-duty and heavy-duty vehicles Offers solutions to fuel-cell system integration problems, optimization of operating conditions, and improvements for fuel-cell materials based on the latest developments Addresses key barriers to the commercial success of fuel cells for transportation, including durability, performance, materials and how to balance these factors

Drawing from a rich body of archival documents, case studies and interviews, this book explores the ways in which graphic designers in China sought to establish graphic design as a profession and discipline from the 1980s to the present day. Yun Wang traces the impact of cultural, economic and social conditions on China’s developing design industry in a period of rapid transformation, focusing on Beijing, Guangzhou and Shenzhen as industry centres. From the influence of the newly implemented reform and opening up policy in 1978, to membership of the World Trade Organization in 2001, and international events such as the 2008 Beijing Olympics, Wang maps the increased demand for design talent and the evolution of a creative industry. This book provides a critical and extensively researched narrative of how graphic design developed locally and regionally, through practice, in education and within the publishing landscape, and pays particular attention to the ways in which designers in different cities in the People’s Republic of China intersected with international networks.Including material from interviews with over 50 designers and other stakeholders, archival research into graphic work, design journals and exhibition catalogues, and 100 illustrations and photographs throughout, this book provides an in-depth exploration of graphic design developments in recent decades. It also features personal and institutional accounts, in addition to the author’s unique insight and reflections on the growing design industry in contemporary China.

Polymer Electrolyte Membrane (PEM) fuel cells hold great promise as a potential alternative to conventional fossil-fuel-powered energy sources. However, they produce waste heat, and the water used in their system must be carefully controlled and monitored. This monograph in Momentum Press's 'Sustainable Energy Series' offers the most up-to-date research on advanced methods for managing both waste heat and monitoring water flows and water concentration in PEM fuel cells. The most workable solutions to these problems and the challenges that still lie ahead are emphasized.

The reader will find:

A review of multi-component mass transport phenomena, particularly as they apply to gas flow and hydrogen and air flowCoverage of multi-phase flow and heat transfer characteristics of PEM fuel cellsUnique coverage of solid water phase behavior of PEM fuel cells and subfreezing temperature operation

The Book of Mirrors is a silver portal opening to the hidden garden of a fragrant universe.The Book of Mirrors by Yun Wang takes the reader on a journey of enlightenment through unexpected discoveries and heartbreaks. This adventure spans different realms: the ancient and the present, the physical and the metaphysical, poetry and science. It is an insistent search for truth, goodness, and beauty, within the scope of the infinite universe.