Publications

The energy transition is pushing towards a considerable diffusion of local energy communities based on renewable energy systems and coupled with energy storage systems or energy vectors to provide independence from fossil fuels and limit carbon emissions. Indeed the variable and intermittent nature of renewables make them inadequate to satisfy the end-users’ electricity demand throughout the whole day; thus the study of energy storage syste Read More

This article investigates the economic and environmental implications of implementing green ammonia production plants in Spain. To this end one business-as-usual scenario for gray ammonia production was compared with three green ammonia scenarios powered with different renewable energy sources (i.e. solar photovoltaic (PV) wind and a combination of solar PV and wind). The results illustrated that green ammonia scenarios reduced the environm Read More

This work presents a study of the effects that integration of electrolysis facilities for Power-to-X processes have on the power grid. The novel simulation setup combines a high-resolution grid optimization model and a detailed scheduling model for alkaline water electrolysis. The utilization and congestion of power lines in northern Germany is investigated by setting different installed capacities and production strategies of the electrolysis facility. For electrolysi Read More

The rapid adoption of hydrogen as an eco-friendly energy source has necessitated the development of intelligent power management systems capable of efficiently utilizing hydrogen resources. However guaranteeing the security and integrity of hydrogen-related data has become a significant challenge. This paper proposes a pioneering approach to ensure secure hydrogen data analysis by integrating blockchain technology enhancing trust transparenc Read More

Hydrogen is the key energy carrier of the future. Numerous industrial processes incorporate hydrogen in their transformation towards climate neutrality. To date the high cost of producing hydrogen from renewable sources has been a major barrier to its widespread adoption. Inspired by these two aspects many researchers have published cost predictions for hydrogen. This review provides an overview of the extant literature of more than 7000 publication Read More

The geographical understanding of directionality in the literature on mission-oriented innovation systems is still underdeveloped. Therefore this article reflects on whether the allocation of funding for R&D activities to different places can direct innovation systems in space. A placebased approach to the allocation of funding and its effects on innovation systems is developed to analyze how the German national government allocates funding to the national innov Read More

In this study the electrical electrochemical and thermodynamic performance of a PV/T electrolyzer system was investigated and the experimental results were verified with a numerical model. The annual amounts of electrical and thermal energy from the PV/T electrolyzer system were calculated as 556.8 kWh and 1912 kWh respectively. In addition the hydrogen production performance for the PV/T electrolyzer was compared with that of a PV electrolyze Read More

The article examines the role of green hydrogen in reducing CO2 emissions in the transition to climate neutrality highlighting both its benefits and challenges. It starts by discussing the production of green hydrogen from renewable sources and provides a brief analysis of primary resource structures for energy production in European countries including Romania. Despite progress there remains a significant reliance on fossil fuels in some countries. Econo Read More

This paper presents the development of a thermodynamic model for the hydrogen refuelling station (HRS) to simulate the process of refuelling which involves the transfer of hydrogen gas from a high-pressure storage tank to the onboard tank of a fuel cell electric vehicle (FCEV). This model encompasses the fundamental elements of an HRS which consists of a storage tank compressor piping system heat exchanger and an on-board vehicle tank. The m Read More

As a paradigm of clean energy hydrogen is gradually attracting global attention. However its unique characteristics of leakage and autoignition pose significant challenges to the development of high-pressure hydrogen storage technologies. In recent years numerous scholars have made significant progress in the field of high-pressure hydrogen leakage autoignition. This paper based on diffusion ignition theory thoroughly explores the mechan Read More