Preface

The 7th Conference of the Sustainable Solutions for Energy and Environment, EENVIRO 2020, October 21-23, 2020 In order to meet the health and safety needs of our attendees and staff, the 7th Conference of the Sustainable Solutions for Energy and Environment (EENVIRO 2020) which was scheduled to be held in Bucharest, Romania, European Union was held virtually online during October 21-23, 2020. Being different from the traditional gatherings we all know, this virtual conference allows us to connect in new ways while keeping expenditure saving and maintaining social distancing. Presentations of presenter from different countries were accessible to hundreds of researchers effectively. This was the original message posted on the conference website: “Since the pandemic has worsened in Romania as well as worldwide and we cannot be certain when the entry restrictions for all incoming travelers to Romania will be lifted, or when the conditions will improve, the EENVIRO 2020 organizing committee has decided to cancel the onsite conference and to hold the conference online only.” At the conference time, 21-23rd October 2020, Bucharest city, the Romania capital (the original conference location) was Covid red code. This meant that no gathering of more than 10 persons were allowed. A lot of countries from which we have participants at EENVIRO Conference were at that moment under travel restrictions to Europe Union (Australia, China, Russia, Canada, etc) or under travel restrictions (2 weeks of quarantine) for the travelers from European Union to Romania. The organizers took into account the possibility of postponing the conference for 2021 but this was not a solution in this case due to various reasons. We issued a questionnaire for the potential participants and the reasons presented by them to organize an online conference were very strong. For example, in the frame of the conference some of the participants had some workshops dedicated to present the results from various research grants on different topics. These researchers were pressed to present the results in 2020 in the frame of their research grants. Other participants wanted to meet in the frame of the conference to propose new research topics to work on. Also, according to our authorities we did not have an answer to the question “When the conference could be organized in the near future?”. Also, the organizers talked with other conference organizers worldwide like indoorair2020.org and they did the same thing as organizing the online conference mostly due to the same reasons. Almost all the participants answered that they prefer that the EENVIRO 2020 conference to be hold online. List of titles EENVIRO 2020 Organizing Committee, Organizing Committee, Scientific committee are available in this Pdf.

In order to meet the health and safety needs of our attendees and staff, the 7th Conference of the Sustainable Solutions for Energy and Environment (EENVIRO 2020) which was scheduled to be held in Bucharest, Romania, European Union was held virtually online during October 21-23, 2020. Being different from the traditional gatherings we all know, this virtual conference allows us to connect in new ways while keeping expenditure saving and maintaining social distancing. Presentations of presenter from different countries were accessible to hundreds of researchers effectively.
This was the original message posted on the conference website: "Since the pandemic has worsened in Romania as well as worldwide and we cannot be certain when the entry restrictions for all incoming travelers to Romania will be lifted, or when the conditions will improve, the EENVIRO 2020 organizing committee has decided to cancel the onsite conference and to hold the conference online only." At the conference time, 21-23rd October 2020, Bucharest city, the Romania capital (the original conference location) was Covid red code. This meant that no gathering of more than 10 persons were allowed. A lot of countries from which we have participants at EENVIRO Conference were at that moment under travel restrictions to Europe Union (Australia, China, Russia, Canada, etc) or under travel restrictions (2 weeks of quarantine) for the travelers from European Union to Romania.
The organizers took into account the possibility of postponing the conference for 2021 but this was not a solution in this case due to various reasons. We issued a questionnaire for the potential participants and the reasons presented by them to organize an online conference were very strong. For example, in the frame of the conference some of the participants had some workshops dedicated to present the results from various research grants on different topics. These researchers were pressed to present the results in 2020 in the frame of their research grants. Other participants wanted to meet in the frame of the conference to propose new research topics to work on. Also, according to our authorities we did not have an answer to the question "When the conference could be organized in the near future?". Also, the organizers talked with other conference organizers worldwide like indoorair2020.org and they did the same thing as organizing the online conference mostly due to the Over the last 35 years, Professor Richard de Dear has focused his research career on defining what occupants want and need from their built environments and assessing the performance of buildings in terms of meeting those requirements. He is currently the most highly cited living researcher in the domain of thermal comfort, with over 250 peer-reviewed papers plus several monographs on the subject. Within that body of research, it is his adaptive model of thermal comfort that's had the greatest impact, not just on the research community but also on the design and operation of actual buildings. De Dear's adaptive model underpins the American Society of Heating and Dr Ashish Shukla completed his PhD from the Indian Institute of Technology, Delhi (ITT Delhi), followed by award of prestigious FCS fellowship to work at the Swiss Federal Institute of Technology (ETH), Zurich, in the Department of Architecture. Currently he is Assistant Professor in Building Engineering Physics at Coventry University, UK. He is an accomplished building physicist and a sustainability professional with research interest in building engineering physics, energy management, energy generating building envelopes and energy storage. His vision is to design self-evolving climate responsive sustainable buildings, which can be achieved by integrated building design aiming to bring new low carbon innovation and improvement to on-site construction practice. He is also fellow member of UK Higher Education Academy.

Laura Aelenei National Laboratoru of Energy and Geology (LNEG) Keynote lecture: Positive Energy Districts for Urban Energy Transitions
Laura Aelenei is senior researcher and Scientific Coordinator of the Research Area Energy in Built Environment at National Laboratory of Energy and Geology (LNEG). She holds a PhD in Civil Engineering, sub-field Building Physics (heat transfer, fluid dynamics), from Technical University of Lisbon (IST-UTL). She has more than fifteen years of experience in energy efficiency and sustainable design strategies for buildings, including passive solutions and renewable energy systems integration. Her expertise relates to buildings energy performance, Net Zero Energy Buildings concept and methodology, buildings physics, buildings Energy Flexibility, Positive Energy Districts and climate-resilience of the built environment. With an active role in EU founded projects and networks as IEA, EERA, eseia, Laura is coordinator of strategic Module 2 Positive Energy Districts Laboratories (PED-Lab) in Microsoft Teams was the application used for EENVIRO 2020 Conference. After every presentation, a 5 minute space was reserved for Q&A sessions. We had numerous Q&A sessions that continued sometimes in the dedicated private channels.
EENVIRO 2020 Conference had 116 articles presentations and 7 plenary sessions held by the keynote speakers. The overall number of participants was 441. The EENVIRO 2020 Conference was free of charge for the participants ant this was the reason why the overall number of participants was higher than in the case of onsite conference. At the EENVIRO 2020 Conference participants were from various cities in Romania (Bucharest, Cluj-Napoca, Timisoara, Iasi, Galati, Constanta) or from various countries in Europe Union (France, Belgium, Norway, Bulgaria, Russia, Spain, Portugal, United Kingdom) or from various countries outside European Union (Russia, China, Australia, Canada, Irak, Cameroon).
For delivering the EENVIRO 2020 Conference we used Microsoft Teams and we also shared the presentation using Facebook page of the Technical University of Civil Engineering Bucharest Romania (https://www.facebook.com/UTCBRO/).
All the articles were scanned with antiplagiarism software.
Overall, the technical quality was good. Few of the participants had some problems with their internet connectivity, but they switched from mobile to cable internet or reverse and the problems were resolved. In some cases, the presenters changed their devices in order to present the articles. Also, the organizers changed their place in the Conference program when needed for this purpose.
On behalf of the Organizing Committee, we would like to take this opportunity to express our sincere gratitude to all authors and presenters. We are also grateful to the Technical Program Committee members and reviewers as well as all the colleagues from IOP publisher. It is the joint efforts of everyone that makes the conference a great success.
On behalf of the Organizing Committee, we would like to take this opportunity to express our sincere gratitude to all authors and presenters. We are also grateful to the Technical Program Committee members and reviewers as well as all the colleagues from IOP publisher. The joint efforts of all have made the EENVIRO conference a great