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Paper presents a technical and economic analysis of the implementation of renewable energy solutions in urban buildings by installing balcony photovoltaic systems. It has been calculated that if 25% of all urban homes in Romania had a balcony photovoltaic system, a total installed power of approximately 1,058 MW would result. The legislative, technical and economic challenges that may hinder the development of these balcony photovoltaic solutions in Europe are analyzed. Information is presented on the influence on...

The paper presents an experimental pilot research, for the study of the integration of the electrical energy vector from a primary regenerative source with the thermal energy vector, for the purpose of residential air conditioning. The research referred to a period with the lowest ambient temperature. Furthermore, the research aims to highlight the economic problems for a local scale (residential heating) when using thermal energy produced by a heat pump with consumption and electricity produced with the help of o...

In these article, we discusses the analysis of the profitability of investments in energy storage batteries, in the context of injection policies in the grid in Romania. The study compares the compensation and energy sale regimes for prosumers and producers depending on the installed capacity, thus showing the impact of market prices and tax regulations on the return of investment (ROI). The case study has three scenarios, each with specific formulas for calculating ROI depending on the price of the stored energy ...

The significant growth of the global population that has happened in the last years strains even more the present fragile balance between the produced and consumed resources, if the current rate of development is to be maintained without change the harmful and the negative effects caused by the global warming will only amplify.The increase of the water level, the desertification of fertile lands and the greenhouse gas effects are only a few of the problems we already need to resolve, because of this the transition...

Hydrogen-based energy production involves the use of fuel cells or the direct combustion of hydrogen (a particular case being hydrogen combustion in internal combustion engines). Direct hydrogen combustion is still in the testing phase, with challenges arising from its energetic properties, which continue to be a difficult factor. For instance, hydrogen has a low calorific value (about three times lower than methane) in its gaseous phase, which is the phase where combustion occurs, a very high combustion speed (ab...