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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...

The paper highlights the complexity of multi-energy integration (electricity and heat) in a regional economic system, by using the vectors represented by green hydrogen, green certificates and methanization of captured carbon dioxide, for a local market mechanism. The scale of application can go down to residential areas of energy self-producers. Regional multi-energy systems take into account the use of fossil fuels (at least methane), along with biomass for the production of electricity alongside that from renew...

Hydrogen is considered the energy source which can ensure the global transition to sustainable low-carbon energy systems. Municipalities can become more eco-friendly by adopting and implementing hydrogen-based energy systems. At the beginning of the transition toward carbon neutrality, the municipalities can use the hydrogen mixed with natural gas in the existing natural gas network for food and domestic hot water preparation, and heating and electricity generation, and the hydrogen stored as compressed gas, cryo-...

Complex energy systems, in the current period of transition to a climate-neutral society, comprise two fully functional subsystems, that of fossil fuel-based production and that of production from renewable energy sources. The functional coexistence of these subsystems is achieved due to the capture of the CO2 component from flue gases through the energy vector represented by green H2. This takes on both the role of energy accumulation and the role of transforming the CO2 component, captured during the combustion ...

The use of hydrogen as a fuel requires as much research as possible on the construction and functional parameters for the development of appropriate burners. The researches undertaken are addressed to diffuse flame burners with concentric jets of fuel and air. These burners cannot lead to flame return, the combustion being much safer, than for the case of burners with fuel-air mixture. The researches were carried out by numerical modeling through the ANSYS-FLUENT V.14.0 software. An important stage of the research...

In the energy field hydrogen will be more obvious to use by certain technologies than by direct combustion. The paper presents a conceptual analysis on the use of hydrogen by hydrogen by hydrogenation of carbon dioxide with final product methane, by hydrogenation of carbon dioxide, with the final product of methanol and by injection in certain proportions into the natural gas network. A new application of carbon dioxide hydrogenation is the decarbonisation of flue gases. To this end, conceptual analyses have been ...