Seminar - Dynamic and flexible thermodynamic power cycles for efficient waste heat recovery by Dr Yu Zhibin
日期：2018 年 08 月 22 日 ( 星期三)
Time：2:00 pm – 3:00 pm
It is estimated that up to 50% of industrial energy input in the world is discharged as waste heat in the form of hot exhaust gases, cooling water, and heat lost from hot equipment surfaces and products. Recovering and utilising such waste heat could significantly improve the energy efficiency of our industrial sectors. Although waste heat recovery is broadly welcomed by industry, there is a lack of implementation of waste heat recovery systems due to various barriers, one of which is lack of efficient energy recovery equipment. While there are several alternative technologies for waste heat recovery, the organic Rankine cycle systems are believed to be the most promising technology in practice. Large ORC systems are commercially viable for high-temperature applications. However, the application of ORC systems to low-temperature waste heat at relatively small scale is considered to be in its infancy due to the low efficiency. Yet, most industrial waste heat sources are in the low temperature band. This talk will introduce the dynamic organic Rankine cycle concept that was recently proposed and developed by the speaker’s team. Such cycles use a zeotropic mixture as working fluid, with a composition system, can adjust the composition of the mixture in situ to closely match the changing ambient temperature, so that the system efficiencies can be improved.
Dr Zhibin Yu is a Senior Lecturer in Energy Engineering within the School of Engineering. He joined the School in September 2012 as a Lecturer, and was promoted to Senior Lecturer in 2017. Prior to this, He worked as a Post-Doctoral Research Associate at the University of Manchester (2006–2011) and the University of Leicester (2011–2012). He received his BEng in Cryogenic and Refrigeration Engineering from Huazhong University of Science and Technology (China) in 2000 and PhD in Thermal Engineering from Technical Institute of Physics and Chemistry, Chinese Academy of Sciences in 2006. Part of his PhD project was carried out at the Laboratoire d’Informatique pour la Mécanique et les Sciences de l’Ingénieur, CNRS, France (2004–2005). His research is mainly focused on thermal energy technologies and their fundamental thermodynamic, heat transfer, fluid-dynamic problems. He is particularly interested in developing novel energy technologies to utilise low temperature heat sources such as geothermal energy, industrial waste heat, solar thermal energy, and exhaust heat of internal combustion engine.