Green hydrogen is among the most promising energy vectors that may enable decarbonization of our society. The present study addresses hard-to-abate sectors via deployment sustainable alternatives to current technologies and processes where complete replacement fossil fuels deemed not nearly immediate. In particular, investigated case tackles emission reduction potential steelmaking in Italian industrial framework implementation dedicated green production systems feed Hydrogen Direct...

The buildings energy consumption is a great part of Europe's overall demand. development diagnostic methods capable promptly alerting users in case issues (e.g. mild and progressive decrease systems components performance) crucial for the smart management buildings. Machine learning-based building monitoring reliable approach identifying subtle anomalies demand behaviour. This study presents application systematic procedure to develop method based on machine learning predictive models,...

This study evaluates the performance and feasibility of hybrid photovoltaic–hydrogen systems integrated with 4.2 MW PV installations, focusing on interplay between electrolyzer capacity, energy storage, hydrogen production. Key findings reveal that downsizing electrolyzers, such as using a 1 unit instead 2 model, increases operational efficiency by extending nominal power usage, though it reduces total output approximately 50%. Meanwhile, expanding storage show diminishing returns, added...

Based on the European Directive, Italian Government has recently published technical rules for accessing service valorizations and incentivizing shared electricity, kick-starting setting-up of Renewable Energy Communities (RECs). A techno-economic analysis is performed based a real case in city Florence to show benefits that creation REC can bring stakeholders: consumers, prosumers, national grid operator third-party companies. Moreover, this study focuses role batteries within by comparing...

Green hydrogen is currently regarded as a key catalyst for the decarbonization of energy-intensive industries. In this context, pulp and paper industry stands out one most demanding, given simultaneous need large amounts heat electricity usually satisfied via cogeneration systems. Given urgent cost-effective solutions in response to climate crisis, it crucial analyze feasibility retrofitting existing power plants operate carbon-neutral. The aim work provide techno-economic analysis...

This paper presents a study of an Organic Rankine Cycle combined with intercooled gas turbine: thermodynamic analyses are carried out using four different organic fluids (toluene, benzene, cyclopentane and cyclohexane). can be turbine through diathermic oil circuit in order to convert waste heat into electrical power: ORC promising choice for recovery at low/medium temperatures. An is characterized by low exhaust temperature, the Cycle, that work lower temperature respect cycle, interesting...

Among the numerous envisioned applications for hydrogen in decarbonisation of energy system, seasonal storage is usually regarded as one most likely options. Although long-term considered at grid-scale level, given increasing diffusion distributed systems and expected cost reduction related components, some companies are starting to offer residential systems, with PV modules batteries, that rely on electrical energy. Such generally composed by water electrolysers, vessels fuel cells. The aim...

Integrating a grid-connected battery into renewable energy community amplifies the collective self-consumption of photovoltaic and facilitates arbitrage in electricity markets. However, how much can independence really increase? Is it cost-effective investment? The answer to these questions represents novelty literature due innovative nature asset under consideration market regulatory framework which is evaluated. Employing net present value assessment, our analysis incorporated aging...

Gas distribution networks traditionally maintain constant pressure setpoints at regulating stations, ensuring a consistent supply to end-users with high safety margin. However, the prospect of hydrogen injection in gas necessitates rethinking operational strategies. This study examines environmental and fluid-dynamic implications implementing smart management approach stations within network localized injection. The research introduces novel simulation-based optimization algorithm,...

Nowadays, the gradual depletion of fossil fuels associated with constraints on emissions greenhouse gases leads to valorize their wasted heat from power plant. One technologies adopted for improvement is utilization combined cycles. For this purpose, steam cycle used most frequently. These systems are highly efficient, but they very complex and water requested, moreover heavy, so cannot always be used. In context, Air Bottoming Cycles (ABC) become attractive potential use in future plants...

An experimental survey on a state of the art leading edge cooling scheme was performed to evaluate heat transfer coefficients (HTC) large scale test facility simulating high pressure turbine airfoil cavity. The section includes trapezoidal supply channel with three racetrack impingement holes. On internal surface edge, four big fins are placed in order confine jets. coolant flow impacts surface, and it is extracted from cavity through 24 showerhead holes film aim present study investigate...