Guokai Chen is currently a PhD student at the Institute of Environmental Design and Engineering, University College London. Guokai had an engineering background in energy, HVAC system and smart building. He received his bachelor's degree at Tongji University, China and MSc at University College London, UK. He had two-year working experience at Tongji Architecture Design Group in Shanghai as a mechanical engineer in the field of HVAC research and sustainable projects. Guokai is currently working on Subtask D of Annex 81 project, and his PhD research is focusing on control performance on advanced building control strategies such as Model Predictive Control.

Dr Virginia Gori is currently a Senior Research Fellow and Lecturer (Teaching) in Building Physics and Engineering at the Bartlett School of Environment, Energy and Resources at the University College London. Virginia has an engineering background, strongly linked to the understanding and assessment of the energy performance of the built environment. After receiving a PhD in Energy and the Built Environment, she was personally awarded an Engineering and Physical Sciences Research Council (EPSRC) Doctoral Prize Fellowship to fund her post-doctoral research for two years. Virginia is currently working on Subtask D of the IEA Annex 81 project and contributing to its leadership. Virginia’s research interests are in the use of data-driven approaches to model and understand the energy performance of the building stock, often with a focus on the potential for retrofit. Her expertise lies at the interface of building physics, in-situ monitoring, and building performance modelling with an aim to provide evidence-based insights for better design and decision-making in the building industry and policy landscape. Virginia is also technical committee member for the European Committee for Standardisation (CEN) and active member on a number of IEA Annex projects.

Professor Ruyssevelt is a qualified architect with a PhD in superinsulated homes. He is currently Professor of Energy and Building Performance at University College London. He has worked in academia and industry over a 40-year career in sustainable energy, energy efficiency and renewable energy. His research now focuses on understanding energy use in building stocks at the local, city, regional and national levels, and on the performance gap between the reality of energy use in buildings and our expectations or design predictions. He pioneered research into the performance gap issue in 1995 with the creation of the PROBE project which brought the subject to the attention of a mainstream audience for the first time and led to changes in both design practice and regulations. Since joining UCL he has advanced the study of building stocks through the development of SimStock, an epidemiological model of the UK building stock employing dynamic simulation. He now leads research in this field, taking the building stock modelling approach to other regions, with India and Peru being the first of these. Paul maintains an overview of international research through his role as UK ExCo representative to the International Energy Agency programme for Energy in Buildings and Communities which oversees some 20 research projects from 25 member countries.

Dr Dimitrios Rovas is currently an Associate Professor in Building Simulation and Optimisation at the Bartlett School of Environment, Energy and Resources at the University College London. Dimitrios received his PhD in Mechanical Engineering from the Massachusetts Institute of Technology. He was a research associate at the Laboratory for Numerical Analysis of the University of Paris VI, France (UPMC). He held Assistant Professor positions in the Department of Mechanical and Industrial Engineering at the University of Illinois at Urbana-Champaign, USA, and the Production Engineering and Management Department at the Technical University of Crete, Greece. From 2013 to 2015, he was a member of the Systems Integration Group at the Fraunhofer Institute for Building Physics in Germany. His research interests are in building physics, smart buildings, design and simulation of building energy management systems, building simulation, building information modelling and development of middleware and data integration platforms for data access and analytical processing of sensor information. He has developed and led the CIBSE-accredited MSc programme in Smart Buildings and Digital Engineering offered at UCL.