After thousands of years, the traditional use of renewable energy sources is evolving to meet modern needs. This book presents the major developments in renewable energy technologies and applications over more than fifty years. It describes an entire era of creativity and innovation, during which Greece contributed new ideas and played an active role in technological advancement, participating dynamically in the European and international effort to expand the use of wind and solar energy in electricity generation.
The volume includes research projects and notable missions, accompanied by commentary on renewable energy technologies and international developments in the field, which marked their rapid progress and expansion in the decades that followed.
Ioannis S. Hatzivasileiadis is a graduate Mechanical and Electrical Engineer (NTUA – National Technical University of Athens) who contributed to the development of renewable energy sources (RES) and sustainable electrical systems.
He worked at the Public Power Corporation of Greece (DEI/ΔΕΗ) from 1962 to 1990 as Director of Hydroelectric Stations and was involved in the construction of major power generation facilities. As head of renewable energy initiatives, he led the development of wind and solar power for electricity generation.
Through international collaborations, he helped develop the Kythnos Wind Park—the first of its kind in Europe—as well as the Kythnos Photovoltaic Station. Together, these projects formed the world’s largest hybrid energy system of their time, contributing significantly to the advancement of innovative technologies with strong international impact.
After 1990, he worked as a consulting engineer in the energy sector and, for many years, with the European Commission. His work focused on evaluating research proposals, managing and assessing research programmes, and acting as a technical advisor on major research projects related to future power grids with high penetration of renewable energy sources, within the framework of the European Commission’s research programmes.
He has served as a member of scientific committees in European and international conferences and has been a keynote speaker at numerous international conferences and workshops, with more than 80 publications. He has also been a member of national and European delegations for cooperation in research and technology, and served as national representative in the Mirror Group of the European Photovoltaic Technology Platform (2005–2012).
He is a founding member of the European Wind Energy Association (EWEA, 1982), a founding member of the Institute of Energy for South-East Europe (IENE), and served as its President (2013–2019). He was also a member of the Permanent Scientific Committee of the Panhellenic Association of Mechanical and Electrical Engineers (1999–2012).
As a pioneer in his field, he has received numerous honorary distinctions for his contribution to renewable energy research and development.
Particular emphasis is placed on the energy transition — the greatest challenge of the twenty-first century — which is expected to transform both the economy and society.
Renewable energy sources, especially solar and wind power, with their low production costs, combined with energy storage and advanced management and control strategies, are set to become the dominant energy sources, offering environmental and social benefits without the high external costs associated with health and environmental damage.
As the book explains, the expansion of electricity use is becoming increasingly attractive, while hydrogen production is also beginning to emerge for a wide range of energy applications. An electrical system based on the goal of 100% renewable energy is both feasible and capable of competing with today’s fossil-fuel-based systems.