Mosè Rossi

Università Politecnica delle Marche | Università degli Studi di Ancona · Department of Industrial Engineering and Mathematical Sciences (DIISM)

Pump-as-Turbine (PaT) technology is taking the field in different small-hydro or energy recovery applications. These machines can be installed in water distribution grids to have pressure levels adjustment and electrical energy production. A PaT working in turbine mode has a different best efficiency point due to a variation of the fluid-dynamic op...

Artificial Neural Networks (ANNs) are used in this work as a computational methodology to forecast both Best Efficiency Point (BEP) and performance curves of Pumps-as-Turbines (PATs) operating in reverse mode. Experimental data from literature are used to train the ANNs: their operating conditions in both pump mode (Input) and turbine mode (Target)...

In this work, an extensive assessment of a predicting model used to evaluate Pumps-as-Turbines’ (PaTs) characteristic curves is presented, with specific attention to the off-design operating conditions. The novelty of the proposed model consists in the possibility to reconstruct the performance curves of a PaT only by knowing a limited number of op...

Fat, oil, and grease (FOG) floating particles in the sump of sewage pumping stations will accumulate together to form rigid layers, resulting in failure for pump device. To overcome this, the free surface vortex (FSV) technique has been considered and applied to transport floating particles toward the submerged suction pump inlet. This paper invest...

The combination of different energy vectors like electrical energy, hydrogen, methane, and water is a crucial aspect to deal with in integrated local energy communities (ILECs). The ILEC stands for a set of active energy users that maximise benefits and minimise costs using optimisation procedures in producing and sharing energy. In particular, the...

Most of the scientific research is focused on KOH-based alkaline electrolysers, while NaOH-based ones are unexplored although they present interesting features. This paper presents a semi-empirical model developed in the Python environment to predict a NaOH-based alkaline electrolyser's performance to cover such a research gap and perform an optimi...

The efficiency of an electrolyser is strongly dependent on the operating temperature of the cells stack; indeed, the higher the temperature, the higher the performance of the overall machine. In this regard, also the process water temperature plays a key role in improving its performance, besides speeding up the transient operation phase (e.g., sta...

Empirical and semi-empirical numerical models of electrolysers and fuel cells are used to predict their behaviour and study rapidly how the performance of a technology changes. Both the polarisation and efficiency curves are mainly dependent on both pressure and temperature and, with a few experimental data, it is possible to forecast the cell beha...

The fast pump-to-turbine transition of a pumped storage unit is highly responsive to electrical power system regulation demands and is a critical process for the unit itself. The correct prediction of this hydraulic transient process is crucial to avoid issues during machine operation. In this study, a three-dimensional numerical model of the trans...

When axial flow pumps-as-turbines (PATs) operate under off-design conditions, unstable and unsteady flow structures appear in the internal flow field, resulting in suboptimal functioning. These operating conditions not only decrease the efficiency of the hydraulic machines but also affect their mechanical reliability. This study establishes relativ...

So far, energy planning methods faced several challenges in achieving a proper assessment due to the extreme variability of input conditions. To considerably decrease the computational efforts in achieving solutions, most of the analyses reported in the scientific literature assume constant costs and demand over the entire planning horizon in a typ...

Metal hydrides have emerged as a promising solution for efficient hydrogen storage in solid matter. While the charging and discharging kinetics of these systems are well-known, dynamic control strategies from a system’s perspective still need a detailed analysis by the scientific community. In this research work, a metal hydrides system and its dyn...

Nowadays, buildings are responsible for almost 40% of global energy consumption, which is addressed by thermal (e.g., heating, cooling, and hot water) and electric (e.g., lighting and household appliances) loads. To meet the residential energy demand and, at the same time, ensure the decarbonisation of the energy infrastructure, hydrogen-based coge...

Batteries are highly flexible energy storages and they can be easily integrated in energy systems. However, the modeling of batteries must be coherent and robust to be effectively included in the energy systems; in particular, the aging phenomena are known to significantly impact the storage capacity, charging/discharging behaviors, and the state o...

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...

p>Integrated local multi-energy systems are recognized as a promising bottom-up alternative to achieve the ambitious energy and climate goals set by the European Commission for 2030. The nature of integrated multi-energy systems presumes a very complex interaction of different aspects from various energy sectors, which historically functioned more...

p>Integrated local multi-energy systems are recognized as a promising bottom-up alternative to achieve the ambitious energy and climate goals set by the European Commission for 2030. The nature of integrated multi-energy systems presumes a very complex interaction of different aspects from various energy sectors, which historically functioned more...

The European Union defined the ambitious carbon-neutrality goal for 2050. Such a transition must be done gradually to avoid huge investments; therefore, medium-term energy planning of energy supply systems must be performed properly considering both economic and environmental aspects. Sector coupling measures aid to achieve this ambitious target, a...

Energy production from clean sources is mandatory to reduce pollutant emissions. Among different options for hidden hydropower potential exploitation, Pump-as-Turbine (PaT) represents a viable solution in pico- and micro-hydropower applications for its flexibility and low-cost. Pumps are widely available in the global market in terms of both sizes...

A R T I C L E I N F O Keywords: Battery energy storage system Local energy community Hydrogen storage system Off-grid operation Seasonal storage Small-scale hydropower A B S T R A C T The energy transition is pushing towards a considerable diffusion of local energy communities based on renewable energy systems and coupled with energy storage system...

Water electrolysis performed by renewables allows to produce green Hydrogen: this process can boost the penetration of clean energy sources into electric grids. This work presents a model developed in Aspen HYSYS® aiming at evaluating the performance of a low-temperature alkaline (ALK) electrolyzer while varying the main operating conditions (e.g.,...

Nowadays, Hydrogen is considered an important energy vector through which the decarbonization process can be carried out if it is produced by Water electrolysis using renewables. Then, Hydrogen is stored for performing medium- and long-term storage, which is suggested for those sources that face considerable electricity production variability throu...

Integrated local multi-energy systems are recognized as a promising bottom-up alternative to achieve the ambitious energy and climate goals set by the European Commission for 2030. The nature of integrated multi-energy systems presumes a very complex interaction of different aspects from various energy sectors, which historically functioned more or...

Editorial of special issue in Sustainability journal

Different energy efficiency interventions have been developed so far by different companies to reduce the energy consumption in urea processes, but none of them are related to the pressure energy recovery from liquids. In this paper, a power recovery solution is proposed for urea plants, namely Hydraulic Power Recovery Turbines (HPRTs). The ASPEN P...

To date, Thermal Energy Storage (TES) systems have been recognized as a crucial energy technology in both civil and industrial sectors since they improve the effectiveness of thermal plants from both technical and economic points of view. In particular, a TES installed downstream a Combined Heat and Power (CHP) unit overcomes the problem of the mis...

Hydraulic machines are currently becoming of interest to enhance the small-scale hydropower potential and perform energy recovery as well. One of the most interesting applications is the use of simple and low-cost turbines in mountain weirs that have not been fully exploited yet. A critical issue in these applications is the risk of strong atmosphe...

The exploitation of residual water flows represents a possible solution to exploit the hidden hydropower potential. The installation of hydraulic machines with peculiar features in small flows could help exploiting this additional hydropower potential. However, the hydraulic machines used in such locations must be simple and cost-effective. This wo...

Energy-environmental planning for road transportation involves a vast investigation of vehicles' technologies and electricity production. However, in developing countries where the public transportation sector is growing quickly, energy-environmental planning is urgently needed. This paper evaluates the future electricity demand, as well as fuel co...

District heating (DH) is an alternative technology to Individual Heating (IH) for satisfying end-user’s needs. This paper assesses the competitiveness of a DH network in the center of Italy from energy, environmental, and economic points of view considering both thermal power plant and end-users‘ sides. On the thermal power plant side, the energy a...

The reduction of water losses is a crucial aspect to be addressed in Water Distribution Networks (WDNs) since they account for almost 50% of the water supply globally. To have a better figure of the involved water volumes, the District Metered Area (DMA) approach has been used in a WDN of a town located in the center of Italy (Osimo). In particular...

Cogeneration is a well-known technology, often coupled with District Heating (DH) networks. In most of the applications, Combined Heat and Power (CHP) units represent a connecting technology among different energy vectors, e.g. electricity, natural gas, and thermal energy distribution networks. In the transition towards a cleaner energy system feat...

Energy efficiency interventions in Water Supply Systems (WSSs) need a precise evaluation of the available water flow rates for energy recovery interventions; however, flow meters are generally too costly for being installed in all the gravity adduction pipelines of a WSS. This paper presents a methodology for predicting flow rates in gravity adduct...

This deliverable is the second one in the series of three reports that are planned to be developed in the activity "Limitations and shortcomings for optimal use of local resources" in the H2020 project eNeuron. After the completion of a previous deliverable of the eNeuron project regarding the critical analysis of the European policy and regulatory...

Hydropower is an important energy sector deployed all over the World with a significant share in the global electricity production. Due to the ongoing climate changes, the lack of water in summer periods compromises the performance of hydraulic machines, whose efficiency quickly decreases when they operate at strong part-load conditions. Among the...

This deliverable includes the first results of work package 2 "Limitations and shortcomings for optimal use of local resources" of the eNeuron project and is the first in a series of three reports that is looking into regulatory aspects concerning the methodologies to be developed within the project. The following sub-activities will identify the p...

Technologies capable of efficiently exploiting unavoidable CO2 streams, have to be deeply investigated and deployed during the transition phase to achieve long-term climate neutrality targets. Among the technologies, Molten Carbonate Cells (MCC) Operating in Electrolysis Mode (MCEC) represents a promising facility to valorize CO2-rich waste streams...

Waste Heat Recovery (WHR) from energy intensive industries has a great potential in curbing CO2 emissions. Among the different solutions, District Heating (DH) is considered of major interest, satisfying the heating demand of users in the proximity of power plants. Considering the energy intensity of the pulp and paper industry, a methodology for e...

Energy recovery solutions reduce considerably the carbon footprint of Water Supply Systems (WSSs), which accounts for a large share of the energy demand in urban areas. The evaluation of the potential saving requires the availability of water flow rate and net head values in WSSs pipelines; however, this task is not always achievable since flow met...

Small-scale energy systems like mini-grids and energy islands can rely on different power production technologies aimed at granting a reliable and efficient energy supply. The implementation of proper management strategies is fundamental to control their operations, reduce the operational costs, control the connection to the grid, as well as increa...

The replacement of fossil fuels for producing energy with renewable sources is crucial to limit the climate change effects. However, the unpredictable nature of renewables, like sun and wind, complicates their integration within the power systems. This problem can be faced with the introduction of Hybrid Renewable Energy Systems (HRESs) where sever...

This work presents a model based on analytical equations to identify the Best Efficiency Point (BEP) of Pumps-as-Turbines (PaTs). The equations are developed exploiting an experimental data-set of 59 PaTs, obtained in both pump and turbine modes, in form of non-dimensional parameters. Data analysis shows a linear correlation between specific speeds...

Chemical plants like oil refineries involve energy intensive processes. Several energy efficiency interventions are being performed in oil refineries to meet the latest emission targets, but few of them are related to the energy recovery from process liquids. In this paper, an energy recovery study of an Italian oil refinery is presented: specifica...

This work presents a detailed analysis of the three-dimensional flows in a Pump-as-Turbine (PaT). The flow field is studied through URANS simulations and a velocity vector analysis. Moreover, a prediction model is used to forecast the performance of the PaT. The results of these methodologies were validated using experimental results. Flow rate and...

The exploitation of renewable energy sources through sustainable energy technologies are taking the field to decrease the pollutions’ emissions into the Earth’s environment. To offset the limitations of such resources, hybrid energy systems are becoming fundamental in grid-connected applications as well as in off-grid ones. However, the unsteady be...

The use of Pumps-as-Turbines (PaTs) to replace hydraulic turbines as energy-recovery units in industrial and civil applications is widening the penetration of hydropower in small-scale plants. PaTs show advantages in terms of installation costs and the availability of solutions. Water Distribution Networks (WDNs) represent a potential application w...

This paper analyses an energy recovery solution based on the Pump-as-Turbine (PaT) technology applied in an oil refinery. Since under-ground water might be contaminated by the chemical processes, an intervention named “Pump & Treat” was adopted in the studied oil refinery to reclaim the installation site and to safeguard the zones nearby. After the...

The use of renewable resources is fundamental for achieving the emissions reduction targets. Small-scale hydropower is a viable solution that has only partially been exploited so far for producing electrical energy in rural/remote zones and for recovering energy where there is availability of pressure gradients and flow rates, like in Water Distrib...

Among the most used hydraulic machines in the small-scale hydropower sector, Pump-as-Turbine (PaT) technology is suitable for both practical and economical aspects. These machines are already profitably applied in remote and rural zones for electricity production and in energy recovery applications in both civil and industrial plants, like Water Di...

This paper analyses an energy recovery solution for the application in an oil refinery, which has undergone significant changes in the last decades due to the construction of different plants, services, storage and logistics systems. Nowadays, with the aim to reduce the water contamination close to the refinery, the local regulations imposed to int...

The aim of this work is to propose a predicting model for evaluating Pump-as-Turbines’ (PaTs) performance in off-design operating conditions. The predicting model has been derived from an elaboration of experimental test data available in literature on a set of several pumps operating in reverse mode. The performance prediction capability of the mo...

The development of renewable energy technologies for producing clean energy has more and more become a priority worldwide. Research activities have not just to target the technological improvement of such systems, but they have also to consider their market deployment. In such a scenario, hydraulic machines, in particular Pumps-as-Turbines (PaTs),...

Centrifugal pumps are used for increasing the energy content of a liquid: this technology is used in chemical processes with liquids having specific chemical and physical characteristics. Most of the processes are closed-loop, meaning that the liquid is reused after a proper physical or chemical washing treatment is performed. Therefore, the pressu...

The hydropower sector is moving to the small-scale generation due to the exploitation of the majority water reservoirs with the aim of providing electrical energy in rural zones. Pump-as-Turbines (PaTs) is one of the most interesting technology due to their use for recovering energy in different industrial applications. Several studies aimed to stu...

In this work, the performances of a 100 kW Micro Gas Turbine (MGT) fed by Natural Gas (NG) and three different biomass-derived Synthesis Gases (SGs) have been assessed using a MATLAB® simulation algorithm. The set of equations in the algorithm includes the thermodynamic transformations of the working fluid in each component, the performance maps th...

Pump-as-Turbine (PaT) technology can be employed in different small-hydro or energy recovery applications such as water distribution grids and electrical energy production. A centrifugal pump, running both in direct and reverse mode, is analysed and hydraulic efficiency, torque, mechanical power are evaluated taking into account several load condit...