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Dr. Elisa Marrasso
University of Sannio

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0 Energy
0 Energy Efficiency
0 Energy and Environment
0 distributed energy systems
0 Primary energy saving

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distributed energy systems
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Review
Published: 09 August 2021 in Energies
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Gas engine-driven heat pumps are an interesting option to satisfy space heating and cooling demands aiming at energy saving, environmental impact and operating costs’ reduction. This work presents (i) a comprehensive review updated on gas engine-driven heat pumps research activities, (ii) the investigation of the central role of this technology in the air conditioning sector and (iii) the future perspectives regarding gas engine heat pumps’ diffusion in the context of the energy sector decarbonisation. The outcomes highlight that gas engine heat pumps could have better environmental performance compared to electric heat pumps both in heating and cooling operations. Moreover, they could play a pivotal role in the fight against climate change and energy security since they can guarantee an energy mix differentiation moving from electricity to natural gas and renewable gases’ usage. Indeed, by 2030, a lower-carbon gas grid could be supported by renewable gases. A further investigation has concerned diffusion of gas heat pumps activated from biofuels produced by local biomass in an energy community scenario based on a low-temperature energy district network. A novel biomass-based GEHP interacting with a low-temperature district heating network is proposed here. This system could save more than 30% of primary energy compared to biomass-fuelled boilers.

ACS Style

Carlo Roselli; Elisa Marrasso; Maurizio Sasso. Gas Engine-Driven Heat Pumps for Small-Scale Applications: State-of-the-Art and Future Perspectives. Energies 2021, 14, 4845 .

AMA Style

Carlo Roselli, Elisa Marrasso, Maurizio Sasso. Gas Engine-Driven Heat Pumps for Small-Scale Applications: State-of-the-Art and Future Perspectives. Energies. 2021; 14 (16):4845.

Chicago/Turabian Style

Carlo Roselli; Elisa Marrasso; Maurizio Sasso. 2021. "Gas Engine-Driven Heat Pumps for Small-Scale Applications: State-of-the-Art and Future Perspectives." Energies 14, no. 16: 4845.

Journal article
Published: 04 May 2021 in Renewable Energy
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Tobacco is traditionally used for cigarettes and cigars manufacturing and after the drying process a great quantity of dry tobacco stalks is treated as waste. In this framework, the scope of the paper is to examine the use of tobacco stems to feed a biomass boiler after a chipping process. The study is focused on southern Italy area thus, firstly, the assessment of tobacco availability in Italy and Campania region has been determined. Then, Burley tobacco stalks sampled out in an air-curing factory of south Italy crop have been characterized according to ASTM D5142 and ASTM D5373 standards. Thereby, biomass and natural gas fuelled boilers have been compared through an energy, environmental and economic analysis on simulative basis. Both systems satisfy the thermal energy demands of a multi-purpose condominium located in a cold Italian climatic zone near the factory. The results have demonstrated that boiler fed by tobacco chips ensures environmental and economic advantages compared to traditional system. In particular, it guarantees a reduction of CO2 emissions up to 16.59 tCO2 in one of investigated scenarios and a simple payback period and a net present value of about 5.6 years and 17,168 € (without economic support), respectively.

ACS Style

Piero Bareschino; Elisa Marrasso; Carlo Roselli. Tobacco stalks as a sustainable energy source in civil sector: Assessment of techno-economic and environmental potential. Renewable Energy 2021, 175, 373 -390.

AMA Style

Piero Bareschino, Elisa Marrasso, Carlo Roselli. Tobacco stalks as a sustainable energy source in civil sector: Assessment of techno-economic and environmental potential. Renewable Energy. 2021; 175 ():373-390.

Chicago/Turabian Style

Piero Bareschino; Elisa Marrasso; Carlo Roselli. 2021. "Tobacco stalks as a sustainable energy source in civil sector: Assessment of techno-economic and environmental potential." Renewable Energy 175, no. : 373-390.

Journal article
Published: 17 February 2021 in Sustainability
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The Clean Energy for all Europeans Package pushes for the diffusion of renewable energy communities, introducing their definition in the European legislative framework. Following this interest, this paper analyses the energy and environmental performance of a renewable energy community composed of two office buildings located in Naples (Italy). Each building has a rooftop photovoltaic plant and one office presents an electric vehicle. The heating and cooling demands of both offices are satisfied by two reversible air to water heat pumps. The offices are connected through an electric microgrid and they are in parallel with a power grid. Buildings and plants are modelled and simulated by means of TRNSYS 17 simulation software. The first analysis has concerned the comparison of the results achieved in renewable energy community configuration and from individual buildings in terms of quantity of electricity imported, exported from/to power grid and consumed on-site. The share of self-consumed photovoltaic electricity rises up to 79% when energy sharing is allowed. The second analysis has been carried out to evaluate the energy and environmental performance of a renewable energy community by means of fixed and hourly varying values for power grid efficiency and emission factors for electricity. The use of time-dependent indicators has led to a lower community primary energy demand and carbon dioxide emissions of 18% and 12%, respectively, in comparison with the scenario in which the fixed parameters have been adopted.

ACS Style

Francesca Ceglia; Elisa Marrasso; Carlo Roselli; Maurizio Sasso. Small Renewable Energy Community: The Role of Energy and Environmental Indicators for Power Grid. Sustainability 2021, 13, 2137 .

AMA Style

Francesca Ceglia, Elisa Marrasso, Carlo Roselli, Maurizio Sasso. Small Renewable Energy Community: The Role of Energy and Environmental Indicators for Power Grid. Sustainability. 2021; 13 (4):2137.

Chicago/Turabian Style

Francesca Ceglia; Elisa Marrasso; Carlo Roselli; Maurizio Sasso. 2021. "Small Renewable Energy Community: The Role of Energy and Environmental Indicators for Power Grid." Sustainability 13, no. 4: 2137.

Journal article
Published: 04 September 2020 in Energies
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This paper presents a thermodynamic, economic, and environmental analysis of a renewable polygeneration system connected to a district heating and cooling network. The system, fed by geothermal energy, provides thermal energy for heating and cooling, and domestic hot water for a residential district located in the metropolitan city of Naples (South of Italy). The produced electricity is partly used for auxiliaries of the thermal district and partly sold to the power grid. A calibration control strategy was implemented by considering manufacturer data matching the appropriate operating temperature levels in each component. The cooling and thermal demands of the connected users were calculated using suitable building dynamic simulation models. An energy network dedicated to heating and cooling loads was designed and simulated by considering the variable ground temperature throughout the year, as well as the accurate heat transfer coefficients and pressure losses of the network pipes. The results were based on a 1-year dynamic simulation and were analyzed on a daily, monthly, and yearly basis. The performance was evaluated by means of the main economic and environmental aspects. Two parametric analyses were performed by varying geothermal well depth, to consider the uncertainty in the geofluid temperature as a function of the depth, and by varying the time of operation of the district heating and cooling network. Additionally, the economic analysis was performed by considering two different scenarios with and without feed-in tariffs. Based on the assumptions made, the system is economically feasible only if feed-in tariffs are considered: the minimum Simple Pay Back period is 7.00 years, corresponding to a Discounted Pay Back period of 8.84 years, and the maximum Net Present Value is 6.11 M€, corresponding to a Profit Index of 77.9% and a maximum Internal Rate of Return of 13.0%. The system allows avoiding exploitation of 27.2 GWh of primary energy yearly, corresponding to 5.49∙103 tons of CO2 avoided emissions. The increase of the time of the operation increases the economic profitability.

ACS Style

Francesca Ceglia; Adriano Macaluso; Elisa Marrasso; Carlo Roselli; Laura Vanoli. Energy, Environmental, and Economic Analyses of Geothermal Polygeneration System Using Dynamic Simulations. Energies 2020, 13, 4603 .

AMA Style

Francesca Ceglia, Adriano Macaluso, Elisa Marrasso, Carlo Roselli, Laura Vanoli. Energy, Environmental, and Economic Analyses of Geothermal Polygeneration System Using Dynamic Simulations. Energies. 2020; 13 (18):4603.

Chicago/Turabian Style

Francesca Ceglia; Adriano Macaluso; Elisa Marrasso; Carlo Roselli; Laura Vanoli. 2020. "Energy, Environmental, and Economic Analyses of Geothermal Polygeneration System Using Dynamic Simulations." Energies 13, no. 18: 4603.

Research article
Published: 20 July 2020 in International Journal of Energy Research
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Electric‐driven heat pumps are one of the most encouraging systems that could support the raising of renewables contribution in civil sector energy consumption, especially with reference to the Countries with a high contribution of renewable energy sources in electricity generation mix. However, the evaluation of the effective energy and environmental performance of an electric heat pump meeting the space heating and cooling requests of a building has to consider several factors that affect the results. Among them great attention should be given to the variability of weather conditions in which the system operates, the changeability of the efficiency and environmental indicators of power grid. The analysis becomes more complex if the variation of these parameters is considered in terms of time and geographic location but it leads to the actual evaluation of the energy conversion system performance that is neglected by European Regulations. This paper presents an energy and environmental analysis of an electric‐driven air‐source heat pump providing the space heating and cooling needs of the same building located in two different geographical locations by means of a dynamic simulation performed in TRNSYS 17. The analysis is carried out considering the average and time‐dependent values of the carbon dioxide emission factors for electricity and the power grid efficiency indicators evaluated by means of the real electricity generation data. In addition, the paper proposes the evaluation of the average and hourly energy and environmental parameters referred only to the electricity market zones in which the buildings are located. These indices are considered in the analysis too. The results have highlighted that the assessment based on average and high‐resolution parameters, as well the evaluation based on indicators referred to electricity market zones only, could return very different outcomes leading to a significant overestimation or underestimation of the energy and environmental performance of the system based on the electric‐driven heat pump. Finally, a further analysis has been carried out to determine how the results can vary considering the average value of the electric efficiency indicator suggested by Italian Regulations and that of other European Countries.

ACS Style

Elisa Marrasso; Carlo Roselli; Maurizio Sasso. Energy and environmental performance of a heat pump in different power grid scenarios. International Journal of Energy Research 2020, 44, 10576 -10598.

AMA Style

Elisa Marrasso, Carlo Roselli, Maurizio Sasso. Energy and environmental performance of a heat pump in different power grid scenarios. International Journal of Energy Research. 2020; 44 (13):10576-10598.

Chicago/Turabian Style

Elisa Marrasso; Carlo Roselli; Maurizio Sasso. 2020. "Energy and environmental performance of a heat pump in different power grid scenarios." International Journal of Energy Research 44, no. 13: 10576-10598.

Journal article
Published: 11 July 2020 in Energies
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In this paper two solar electric-driven air conditioning systems are compared and analyzed from an energy and environmental point of view. Both systems satisfy the electricity, space heating and cooling needs of an existing multi-purpose, multi-story building that is simulated with TRNSYS 17. The first one, considered as reference system, is based on a centralized electric heat pump coupled with a conventional photovoltaic plant installed 10 years ago. The second one, hereinafter proposed system, has a hybrid configuration, consisting of a ground-source heat pump, a low temperature thermal network and a series of electric heat pumps, one per apartment. In addition, the plant is connected to a high-performance commercial photovoltaic system equipped with a solar tracking system to the panels. Five different solutions realized with vertical, two horizontal orientations, polar and two-axis trackers are taken into account and compared with the standard fixed configuration. The last hybrid configuration can be seen as an upgrade of an existing decentralized air conditioning system in which the local electric heat pumps are converted in water-to-water devices that interact with the thermal grid representing the heat source/sink for them. In both solar electric heating and cooling plants the photovoltaic system is installed on the building roof and it produces electricity to feed the heat pumps and end-users. The electricity surplus or the load not covered by solar field is fed to/taken from power grid. The energy and environmental analyses have been performed by considering both average annual and monthly values of power grid efficiency and CO2 emission factor for electricity. By comparing reference system and proposed one equipped with a two-axis tracker system a primary fossil energy saving of 101.67% is achieved in summer period and 28.10% in winter period. These percentages are the highest values recorded, even if, for all configurations the energy analysis rewards the proposed system. The results of environmental analysis demonstrate that the reference system has the worst performances compared to proposed system with all solar tracker systems selected guarantying positive values for avoided carbon dioxide index up to 45.86%.

ACS Style

Elisa Marrasso; Carlo Roselli; Francesco Tariello. Comparison of Two Solar PV-Driven Air Conditioning Systems with Different Tracking Modes. Energies 2020, 13, 3585 .

AMA Style

Elisa Marrasso, Carlo Roselli, Francesco Tariello. Comparison of Two Solar PV-Driven Air Conditioning Systems with Different Tracking Modes. Energies. 2020; 13 (14):3585.

Chicago/Turabian Style

Elisa Marrasso; Carlo Roselli; Francesco Tariello. 2020. "Comparison of Two Solar PV-Driven Air Conditioning Systems with Different Tracking Modes." Energies 13, no. 14: 3585.

Journal article
Published: 29 May 2020 in Energies
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Improvements in using geothermal sources can be attained through the installation of power plants taking advantage of low and medium enthalpy available in poorly exploited geothermal sites. Geothermal fluids at medium and low temperature could be considered to feed binary cycle power plants using organic fluids for electricity “production” or in cogeneration configuration. The improvement in the use of geothermal aquifers at low-medium enthalpy in small deep sites favours the reduction of drilling well costs, and in addition, it allows the exploitation of local resources in the energy districts. The heat exchanger evaporator enables the thermal heat exchange between the working fluid (which is commonly an organic fluid for an Organic Rankine Cycle) and the geothermal fluid (supplied by the aquifer). Thus, it has to be realised taking into account the thermodynamic proprieties and chemical composition of the geothermal field. The geothermal fluid is typically very aggressive, and it leads to the corrosion of steel traditionally used in the heat exchangers. This paper analyses the possibility of using plastic material in the constructions of the evaporator installed in an Organic Rankine Cycle plant in order to overcome the problems of corrosion and the increase of heat exchanger thermal resistance due to the fouling effect. A comparison among heat exchangers made of commonly used materials, such as carbon, steel, and titanium, with alternative polymeric materials has been carried out. This analysis has been built in a mathematical approach using the correlation referred to in the literature about heat transfer in single-phase and two-phase fluids in a tube and/or in the shell side. The outcomes provide the heat transfer area for the shell and tube heat exchanger with a fixed thermal power size. The results have demonstrated that the plastic evaporator shows an increase of 47.0% of the heat transfer area but an economic installation cost saving of 48.0% over the titanium evaporator.

ACS Style

Francesca Ceglia; Adriano Macaluso; Elisa Marrasso; Maurizio Sasso; Laura Vanoli. Modelling of Polymeric Shell and Tube Heat Exchangers for Low-Medium Temperature Geothermal Applications. Energies 2020, 13, 2737 .

AMA Style

Francesca Ceglia, Adriano Macaluso, Elisa Marrasso, Maurizio Sasso, Laura Vanoli. Modelling of Polymeric Shell and Tube Heat Exchangers for Low-Medium Temperature Geothermal Applications. Energies. 2020; 13 (11):2737.

Chicago/Turabian Style

Francesca Ceglia; Adriano Macaluso; Elisa Marrasso; Maurizio Sasso; Laura Vanoli. 2020. "Modelling of Polymeric Shell and Tube Heat Exchangers for Low-Medium Temperature Geothermal Applications." Energies 13, no. 11: 2737.

Journal article
Published: 17 May 2020 in Energies
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Energy systems face great challenges from both the supply and demand sides. Strong efforts have been devoted to investigate technological solutions aiming at overcoming the problems of fossil fuel depletion and the environmental issues due to the carbon emissions. Hybrid (activated by both renewables and fossil fuels) distributed energy systems can be considered a very effective and promising technology to replace traditional centralized energy systems. As a most peculiar characteristic, they reduce the use of fossil sources and transmission and distribution losses along the main power grid and contribute to electric peak shaving and partial-loads losses reduction. As a direct consequence, the transition from centralized towards hybrid decentralized energy systems leads to a new role for citizens, shifting from a passive energy consumer to active prosumers able to produce energy and distribute energy. Such a complex system needs to be carefully modelled to account for the energy interactions with prosumers, local microgrids and main grids. Thus, the aim of this paper is to investigate the performance of a hybrid distributed energy system serving an urban community and modelled within the framework of agent-based theory. The model is of general validity and estimates (i) the layout of the links along which electricity is distributed among agents in the local microgrid, (ii) electricity exchanged among agents and (iii) electricity exported to the main power grid or imported from it. A scenario analysis has been conducted at varying the distance of connection among prosumers, the installed capacity in the area and the usage of links. The distributed energy system has been compared to a centralized energy system in which the electricity requests of the urban community are satisfied by taking electricity from the main grid. The comparison analysis is carried out from an energy, environmental and economic point of view by evaluating the primary energy saving, avoided carbon dioxide emissions and the simple payback period indices.

ACS Style

Alberto Fichera; Elisa Marrasso; Maurizio Sasso; Rosaria Volpe. Energy, Environmental and Economic Performance of an Urban Community Hybrid Distributed Energy System. Energies 2020, 13, 2545 .

AMA Style

Alberto Fichera, Elisa Marrasso, Maurizio Sasso, Rosaria Volpe. Energy, Environmental and Economic Performance of an Urban Community Hybrid Distributed Energy System. Energies. 2020; 13 (10):2545.

Chicago/Turabian Style

Alberto Fichera; Elisa Marrasso; Maurizio Sasso; Rosaria Volpe. 2020. "Energy, Environmental and Economic Performance of an Urban Community Hybrid Distributed Energy System." Energies 13, no. 10: 2545.

Journal article
Published: 14 April 2020 in Energy
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Combined heat and power generation traditionally allows for higher energy performance than separate production of heat and electricity. However, the significant increase of the renewable energy sources contribution in electricity production has spatially and temporally modified the context in which polygeneration systems operate and the energy and environmental profitability of these technologies could be undetermined. In such a situation it seems interesting to investigate the influence of the power grid efficiency variation on the polygeneration systems performance. For this purpose energy and environmental performance of a proposed system based on combined production are compared to those achieved by a conventional system based on separate production. The primary energy demand of conventional and proposed systems due to electricity depends on the efficiency of the national electric energy system features. In this paper, this efficiency is considered to be time-varying (hour-by-hour) and it is further taken into account that the electric system efficiency changes in different regions of the same Country. According to Italian day ahead market of electricity the national territory is divided in 6 zones; two of them (Centre-North zone and Centre-South zone) will be specifically considered and compared hereinafter. The differences that arise in results are also assessed with respect to the case in which national and local average efficiency is taken into account. The environmental analysis is performed considering the average and the time-varying Italian and local electricity emission factors. The results have highlighted that the cogeneration system feasibility depends upon the variability of these factors. Indeed, referring to thermoelectric-based power grid efficiency, only in Centre-North zone is more energetically convenient to produce heat and power by separate production systems. The environmental analysis outcomes have showed the same trend of energy analysis results in all the considered zones underlining that the evolution towards sustainability in Smart Grids requires an integrated approach.

ACS Style

C. Roselli; E. Marrasso; F. Tariello; M. Sasso. How different power grid efficiency scenarios affect the energy and environmental feasibility of a polygeneration system. Energy 2020, 201, 117576 .

AMA Style

C. Roselli, E. Marrasso, F. Tariello, M. Sasso. How different power grid efficiency scenarios affect the energy and environmental feasibility of a polygeneration system. Energy. 2020; 201 ():117576.

Chicago/Turabian Style

C. Roselli; E. Marrasso; F. Tariello; M. Sasso. 2020. "How different power grid efficiency scenarios affect the energy and environmental feasibility of a polygeneration system." Energy 201, no. : 117576.

Journal article
Published: 13 January 2020 in Journal of Cleaner Production
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The current energy and environmental target is the completely integration of the energy produced from different sources taking into account the renewables. The traditional power grids or thermal-cooling and heating conversion systems converge to the use of smart grids and to the planning of intelligent local organizations through energy integration techniques. This cannot be assessed as an isolated problem but an integrated one. The right construction of smart society is to match different challenges achieving sustainable energy systems not only from the point of view of energy consumption in different sectors (civil, industrial, agriculture, transport) and of the related of pollutants emissions, but considering simultaneously the relation with the socio-economic impact. The aim of this paper is firstly to examine the theories-approach to smart energy systems at the community level, the scientific literature of the smart energy community, the benefits of their potential applications in the smart energy municipalities. Finally, it manages the aspects related to smart energy community adoption with a multidisciplinary approach linking the technical conditions to the socio-economic systems of territorial planning. The main finding is that the concept of the intelligent energy community is strictly related to a coherent and intersectoral approach searching the best control strategy to satisfy all energy requirements. Moreover, the road leading to the smart energy community is essential to build the more sustainable renewable energy systems, to collect storage synergies between energy sub-sectors through the energy sharing and finally to exploit economically efficient sources.

ACS Style

F. Ceglia; P. Esposito; E. Marrasso; M. Sasso. From smart energy community to smart energy municipalities: Literature review, agendas and pathways. Journal of Cleaner Production 2020, 254, 120118 .

AMA Style

F. Ceglia, P. Esposito, E. Marrasso, M. Sasso. From smart energy community to smart energy municipalities: Literature review, agendas and pathways. Journal of Cleaner Production. 2020; 254 ():120118.

Chicago/Turabian Style

F. Ceglia; P. Esposito; E. Marrasso; M. Sasso. 2020. "From smart energy community to smart energy municipalities: Literature review, agendas and pathways." Journal of Cleaner Production 254, no. : 120118.

Journal article
Published: 08 July 2019 in Energy Conversion and Management
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The power system has faced unprecedented challenges in the last decade caused by many factors: the introduction of the open electricity market, the diffusion of distributed generation, the growth of the electricity production from the no-programmable renewable energy sources, etc. In this framework the power generation system turned extremely varied and complex. In addition, European Union highlighted the need to increase the energy efficiency to achieve the goal of 30% savings in primary energy consumption by 2030 compared to 1990 levels. Since the goal is defined on primary energy level, the electric efficiency indicators are central issues in the assessment of energy saving measures that affect electricity demand and involve different processes. However, all European Directives set electric efficiency indicators and carbon dioxide emission factors to fixed values neglecting their intrinsic time-variability due to the primary energy source mix used in the electricity generation hour by hour. The use of a fixed value for these parameters could lead to inaccurate or wrong results in various processes. Indeed, they have an impact on the choice of electricity versus fossil-fuel based technologies. In particular, they affect both the possibility for a product to retain access to European market, and its specific rating in an energy labelling class. Moreover, in the case of the modelling of any energy system that interacts with the power grid the electric efficiency indicators are the crucial factors to assess the potential primary energy savings of the technologies. On another level, the use of an incorrect value of energy and environmental indicators in the evaluation of the primary energy savings of those energy efficiency measures supported by economic mechanisms (as white certificates, policy mechanisms supporting renewables, tax deductions), could lead to an underestimation or an overestimation of the economic support. In this context, the aim of this paper is to perform an hourly analysis of the Italian electricity production mix evaluating the contribution of each primary energy source. The novelty of this approach is related to the evaluation of the electricity produced by each fossil and renewable source with an hourly time resolution over the years 2016 and 2017. Four power plant efficiency indicators and three carbon dioxide emission factors have been also defined and determined on hourly basis for both considered years. The results of the analysis have showed the strongly variability of the considered parameters across the years, the seasons and hour by hour depending upon the hourly power generation mix.

ACS Style

E. Marrasso; C. Roselli; M. Sasso. Electric efficiency indicators and carbon dioxide emission factors for power generation by fossil and renewable energy sources on hourly basis. Energy Conversion and Management 2019, 196, 1369 -1384.

AMA Style

E. Marrasso, C. Roselli, M. Sasso. Electric efficiency indicators and carbon dioxide emission factors for power generation by fossil and renewable energy sources on hourly basis. Energy Conversion and Management. 2019; 196 ():1369-1384.

Chicago/Turabian Style

E. Marrasso; C. Roselli; M. Sasso. 2019. "Electric efficiency indicators and carbon dioxide emission factors for power generation by fossil and renewable energy sources on hourly basis." Energy Conversion and Management 196, no. : 1369-1384.

Journal article
Published: 12 April 2019 in Energy
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In this paper four different air conditioning systems designed for a building located in Naples, are investigated. The first plant is based on distributed energy conversion systems: twelve boilers and twelve chillers. In the second solution the space heating demand is satisfied by a centralised boiler while the cooling load is met by a chiller. The third option consists of a trigeneration plant. The fourth configuration is composed by an electric heat pump supplying space heating and cooling and a centralised boiler used for domestic needs. Dynamic simulations have been carried out to compare the energy and environmental performance of the centralised systems with those achieved by the distributed one. Besides, as further users, for the third option, two electric vehicles charged by the cogenerated electricity surplus are compared to diesel cars. The results show that the best energy and environmental performance are achieved by the cogenerator-based system, with a primary energy demand of 120.6 MWh/y and equivalent dioxide carbon emissions of 25.2 t/y in the configuration without vehicles. This result is also confirmed with electric and diesel vehicles. The energy competitiveness of the plant with electric heat pump is achieved only in a scenario with a high penetration of renewable energy sources.

ACS Style

E. Marrasso; C. Roselli; M. Sasso; F. Tariello. Comparison of centralized and decentralized air-conditioning systems for a multi-storey/multi users building integrated with electric and diesel vehicles and considering the evolution of the national energy system. Energy 2019, 177, 319 -333.

AMA Style

E. Marrasso, C. Roselli, M. Sasso, F. Tariello. Comparison of centralized and decentralized air-conditioning systems for a multi-storey/multi users building integrated with electric and diesel vehicles and considering the evolution of the national energy system. Energy. 2019; 177 ():319-333.

Chicago/Turabian Style

E. Marrasso; C. Roselli; M. Sasso; F. Tariello. 2019. "Comparison of centralized and decentralized air-conditioning systems for a multi-storey/multi users building integrated with electric and diesel vehicles and considering the evolution of the national energy system." Energy 177, no. : 319-333.

Journal article
Published: 21 July 2018 in Energy Conversion and Management
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Urban heat island affects cities climate and results in higher air temperature with respect to the surrounding rural zones. Anthropogenic heat released by human activities exacerbates this phenomenon which impacts on environmental and energy fields. Air conditioning is commonly used to achieve comfort indoor conditions in the warmer urban climate but it is also one of the serious cause of the urban heat islands. The heat rejected by the condensers of air conditioning systems, increases the air temperature next to the buildings in which they are installed. In this paper a system consisting of a ground-source heat pump, a low temperature thermal network and a series of electric heat pumps, is analysed. The thermal grid is the heat source/sink for the water to water electric heat pumps that are installed at each end-user of a multi-purpose six floors building located in Naples (Southern of Italy). In cooling mode the condenser heat is discarded in the ground by the ground source heat pump that operates between the lower temperature thermal grid and the borefield. In the heating period the thermal network is heated by the ground source heat pump, that draws energy from the ground. The models simulating the energy conversion systems, the low temperature thermal network and the building, are implemented in the dynamic simulation software TRNSYS 17. A first advantage of the proposed configuration is the avoided interaction with the outside air and the corresponding mitigation of the urban heat island phenomenon. A second one is the higher coefficient of performance of the water to water electric heat pumps, operating with a lower temperature gap with respect to the case in which the electric heat pumps interact with the outside air. Furthermore, the interaction with thermal grid allows high seasonal performance due to the low fluctuation of the temperature with respect to the air. Finally this energy efficient system could be simply installed not only in the new buildings, but also in refurbishments. The proposed system is compared with a conventional one installed in each dwelling consisting of an air to water air conditioner for cooling operation and a boiler for heating. Interesting global and local environmental advantages are obtained.

ACS Style

Elisa Marrasso; Carlo Roselli; M. Sasso; F. Tariello. Global and local environmental and energy advantages of a geothermal heat pump interacting with a low temperature thermal micro grid. Energy Conversion and Management 2018, 172, 540 -553.

AMA Style

Elisa Marrasso, Carlo Roselli, M. Sasso, F. Tariello. Global and local environmental and energy advantages of a geothermal heat pump interacting with a low temperature thermal micro grid. Energy Conversion and Management. 2018; 172 ():540-553.

Chicago/Turabian Style

Elisa Marrasso; Carlo Roselli; M. Sasso; F. Tariello. 2018. "Global and local environmental and energy advantages of a geothermal heat pump interacting with a low temperature thermal micro grid." Energy Conversion and Management 172, no. : 540-553.

Journal article
Published: 01 June 2018 in Energy Conversion and Management
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ACS Style

Elisa Marrasso; Carlo Roselli; M. Sasso; Ana Picallo Perez; J.M. Sala Lizarraga. Dynamic simulation of a microcogeneration system in a Spanish cold climate. Energy Conversion and Management 2018, 165, 206 -218.

AMA Style

Elisa Marrasso, Carlo Roselli, M. Sasso, Ana Picallo Perez, J.M. Sala Lizarraga. Dynamic simulation of a microcogeneration system in a Spanish cold climate. Energy Conversion and Management. 2018; 165 ():206-218.

Chicago/Turabian Style

Elisa Marrasso; Carlo Roselli; M. Sasso; Ana Picallo Perez; J.M. Sala Lizarraga. 2018. "Dynamic simulation of a microcogeneration system in a Spanish cold climate." Energy Conversion and Management 165, no. : 206-218.

Journal article
Published: 01 October 2016 in Energy Conversion and Management
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ACS Style

Giovanni Angrisani; Atsushi Akisawa; Elisa Marrasso; Carlo Roselli; Maurizio Sasso. Performance assessment of cogeneration and trigeneration systems for small scale applications. Energy Conversion and Management 2016, 125, 194 -208.

AMA Style

Giovanni Angrisani, Atsushi Akisawa, Elisa Marrasso, Carlo Roselli, Maurizio Sasso. Performance assessment of cogeneration and trigeneration systems for small scale applications. Energy Conversion and Management. 2016; 125 ():194-208.

Chicago/Turabian Style

Giovanni Angrisani; Atsushi Akisawa; Elisa Marrasso; Carlo Roselli; Maurizio Sasso. 2016. "Performance assessment of cogeneration and trigeneration systems for small scale applications." Energy Conversion and Management 125, no. : 194-208.

Journal article
Published: 01 September 2016 in Energies
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A hybrid solar-assisted trigeneration system is analyzed in this paper. The system is composed of a 20 m2 solar field of evacuated tube collectors, a natural gas fired micro combined heat and power system delivering 12.5 kW of thermal power, an absorption heat pump (AHP) with a nominal cooling power of 17.6 kW, two storage tanks (hot and cold) and an electric auxiliary heater (AH). The plant satisfies the energy demand of an office building located in Naples (Southern Italy). The electric energy of the cogenerator is used to meet the load and auxiliaries electric demand; the interactions with the grid are considered in cases of excess or over requests. This hybrid solution is interesting for buildings located in cities or historical centers with limited usable roof surface to install a conventional solar heating and cooling (SHC) system able to achieve high solar fraction (SF). The results of dynamic simulation show that a tilt angle of 30° maximizes the SF of the system on annual basis achieving about 53.5%. The influence on the performance of proposed system of the hot water storage tank (HST) characteristics (volume, insulation) is also studied. It is highlighted that the SF improves when better insulated and bigger HSTs are considered. A maximum SF of about 58.2% is obtained with a 2000 L storage, whereas the lower thermal losses take place with a better insulated 1000 L tank.

ACS Style

Elisa Marrasso; Carlo Roselli; Maurizio Sasso; Francesco Tariello. Analysis of a Hybrid Solar-Assisted Trigeneration System. Energies 2016, 9, 705 .

AMA Style

Elisa Marrasso, Carlo Roselli, Maurizio Sasso, Francesco Tariello. Analysis of a Hybrid Solar-Assisted Trigeneration System. Energies. 2016; 9 (9):705.

Chicago/Turabian Style

Elisa Marrasso; Carlo Roselli; Maurizio Sasso; Francesco Tariello. 2016. "Analysis of a Hybrid Solar-Assisted Trigeneration System." Energies 9, no. 9: 705.

Review
Published: 01 January 2014 in Energy Procedia
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ACS Style

Giovanni Angrisani; Elisa Marrasso; Carlo Roselli; Maurizio Sasso. A Review on Microcogeneration National Testing Procedures. Energy Procedia 2014, 45, 1372 -1381.

AMA Style

Giovanni Angrisani, Elisa Marrasso, Carlo Roselli, Maurizio Sasso. A Review on Microcogeneration National Testing Procedures. Energy Procedia. 2014; 45 ():1372-1381.

Chicago/Turabian Style

Giovanni Angrisani; Elisa Marrasso; Carlo Roselli; Maurizio Sasso. 2014. "A Review on Microcogeneration National Testing Procedures." Energy Procedia 45, no. : 1372-1381.