Anaerobic digestion (AD) is a promising biowaste valorization technology for sustainable
energy, circular economy, local energy community growth, and supporting local authorities' …

The evolution of energy sector worldwide triggered intense preoccupation on both finding
alternative renewable energy sources and environmental issues. Romania is considered to …

The progress of solar energy conversion technologies during the last few decades triggered
the development of various types of collectors, thermal, photovoltaic (PV), or hybrid. In this …

The anticipated depletion of conventional fuels (crude oil, coal) reserves as energy sources
triggered extended researches for renewable energy sources. In the last few decades …

This paper reports on basic elements of energy and exergy analyses performed on solar
collectors. The initial analysis on solar thermal collector was extended to hybrid solar panels …