BIANCO V.

The process of the vortex flow formation in the Ranque-Hilsch vortex tube is studied. Starting from deficiencies of the existing vortex tubes, a novel type for the transonic nozzle is suggested and designed. The proposed nozzle is different from the existing classical ones by the presence of additional supersonic section placed after the...

Enhancement of the cold flow deceleration unit is considered in the paper to improve the energetic efficiency of the vortex tube. It was shown that the gradual expansion of the cross-section in the cold flow diffuser is inefficient for reducing the gas flow velocity in presence of its significant rotation. Installation of a blade grid at the...

The integration of energy storage into energy systems is widely recognised as one of the key technologies for achieving a more sustainable energy system. The capability of storing energy can support grid stability, optimise the operating conditions of energy systems, unlock the exploitation of high shares of renewable energies, reduce the...

The integration of energy storage into energy systems is widely recognised as one of the key technologies for achieving a more sustainable energy system. The capability of storing energy can support grid stability, optimise the operating conditions of energy systems, unlock the exploitation of high shares of renewable energies, reduce the...

The present paper proposes an analysis concerning the impact of the reduction of the net electricity flow between France and Italy due to the phase out of French nuclear power plants. The analysis is performed by using a bid stack model which offers an approximate, but reliable representation of the Italian power system, as shown by extensive...

Energy efficiency has a pivotal role in the European Union energy strategy and the end use sector which is considered most attractive for energy savings is the building one. Within the building sector residential buildings have a large share, therefore the present study proposes an analysis of the energy efficiency opportunities in the Italian...

(1) Background: The present paper aims at estimating the quality of the forecasts obtained by using one equation models. In particular, the focus is on the effect that the explanatory variables have on the forecasted quantity. The analysis is performed on the long term natural gas consumption in the Italian residential sector, but the same...

Implementation of energy efficiency interventions in the residential sector is pivotal to drive the energy transition and achieve energy policy targets. For such a reason, public programs supporting the renovation of residential buildings are available globally, but public incentives are not enough to address all the potential and it is...

Piping systems are a common element of thermal systems in several sectors. They usually have the function to deliver hot fluids for thermal processes and/or final uses, and they might be responsible for a large amount of heat losses, which results in higher primary energy consumption and carbon emissions, if adequate insulation layers are not...

This paper aims at assessing energy inequality, which is at the center of SDG7, in the Eurasian Economic Union – a recently created international organization with arguably the closest integration in the energy sphere for all member states: Armenia, Belarus, Kazakhstan, Kyrgyzstan, and Russia. The research was performed with the use of...

The scope of the work is to depict a solid framework to interpret the capacity development of solar PV in Italy. To this aim the pivotal roles of public incentives is addressed and a vis a vis analysis of the regulatory framework and corresponding quantitative data is provided. The Italian regulatory framework did not provide an adequate focus...

The present paper presents a methodology to effectively address the evaluation of building energy retrofitting projects in a highly uncertain context. Buildings are modelled in terms of archetypes which are characterized by specific features, e.g., U-values, heating plant typology, surface to volume ratio, etc. By using the Monte Carlo...

To improve the integration of thermal renewables in buildings, the utilization of thermal storage is of fundamental importance. The timing mismatch between thermal energy generation (e.g., for domestic hot water) and utilization is usually a limiting factor in the spread of thermal renewables, such as solar thermal panels. Traditionally water...

The present research proposes an analysis on the inequality of the consumption of electricity, different typologies of primary energy, namely natural gas, coal and oil, and carbon emissions in the period 2008–2016 within European Union. A decomposition in within and between country groups on the basis of their GDP per capita is also developed,...

Megacities are mainly located in developing countries and face challenges in building infrastructures to ensure modern and clean energy access to citizens while coping with lifestyle changes. This paper assesses the renewables impact on energy transition for megacities (supply and all demand sectors) using the Greater Cairo megacity as case...

During the last two decades, a relevant development of renewable energy sources for electricity generation has been observed in Spain. Their diffusion has provoked deep changes that at times have been controversial. The large penetration of renewables under the recent economic conditions has affected power plants, triggering changes in the...

Urban energy system modelling allows megacities to assess their future development and to draw sustainable pathways to meet the rapidly increasing energy needs. This paper elaborates three different scenarios for energy transition in Greater Cairo with particular emphasis on the impact of lowering the share of inhabitants living in informal...

The lasting world economic downturn due to COVID-19 pandemic allows decision-makers and societies to re-think the economic growth basis and drivers, laying the foundation for sustainable development. Green economic recovery takes place with the leading role of the energy industry. The paper focuses on the application and desired effects of...

This work aims to present an analysis of electricity and natural gas supply security in the four European Union countries with the highest level of consumption, namely Germany, France, Italy, and Spain. The goal of the study is to use and adapt a set of 22 indicators for estimating the level of energy security. The evaluation of an index called...