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Luca Antonio Tagliafico
University of Genoa - DIME/TEC, Division of Thermal Energy and Environmental Conditioning, Via All'Opera Pia 15/A, 16145, Genoa, Italy

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Journal article
Published: 16 July 2021 in Energy
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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 approach, the proposed method can address the influence of more than thirty important parameters on the final result in terms of energy savings, Net Present Value and other indices aimed to quantify the level of risk associated to complex energy efficiency interventions, e.g., energy saving at risk. The methodology is tested on a case study related to a building built in the ‘60s and located in Rome, Italy. However, the method is applicable irrespectively of the location, climatic conditions, and typology of the building. Results highlight that a retrofitting intervention consisting in wall insulation has a risk to be unprofitable equal to 47%. This can be ascribed to the mild climatic conditions of the location.

ACS Style

Federico Scarpa; Luca A. Tagliafico; Vincenzo Bianco. Financial and energy performance analysis of efficiency measures in residential buildings. A probabilistic approach. Energy 2021, 236, 121491 .

AMA Style

Federico Scarpa, Luca A. Tagliafico, Vincenzo Bianco. Financial and energy performance analysis of efficiency measures in residential buildings. A probabilistic approach. Energy. 2021; 236 ():121491.

Chicago/Turabian Style

Federico Scarpa; Luca A. Tagliafico; Vincenzo Bianco. 2021. "Financial and energy performance analysis of efficiency measures in residential buildings. A probabilistic approach." Energy 236, no. : 121491.

Journal article
Published: 18 June 2021 in Energies
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Liquefied Natural Gas (LNG) is a crucial resource to reduce the environmental impact of fossil-fueled vehicles, especially with regards to maritime transport, where LNG is increasingly used for ship bunkering. The present paper gives insights on how the installation of LNG tanks inside harbors can be capitalized to increase the energy efficiency of port cities and reduce GHG emissions. To this purpose, a novel integrated energy system is introduced. The Boil Off Gas (BOG) from LNG tanks is exploited in a combined plant, where heat and power are produced by a regenerated gas turbine cycle; at the same time, cold exergy from LNG regasification contributes to an increase in the efficiency of a vapor compression refrigeration cycle. In the paper, the integrated energy system is simulated by means of dynamic modeling under daily variable working conditions. Results confirm that the model is stable and able to determine the time behavior of the integrated plant. Energy saving is evaluated, and daily trends of key thermophysical parameters are reported and discussed. The analysis of thermal recovering from the flue gases shows that it is possible to recover a large energy share from the turbine exhausts. Hence, the system can generate electricity for port cold ironing and, through a secondary brine loop, cold exergy for a refrigeration plant. Overall, the proposed solution allows primary energy savings up to 22% when compared with equivalent standard technologies with the same final user needs. The exploitation of an LNG regasification process through smart integration of energy systems and implementation of efficient energy grids can contribute to greener energy management in harbors.

ACS Style

Davide Borelli; Francesco Devia; Corrado Schenone; Federico Silenzi; Luca Tagliafico. Dynamic Modelling of LNG Powered Combined Energy Systems in Port Areas. Energies 2021, 14, 3640 .

AMA Style

Davide Borelli, Francesco Devia, Corrado Schenone, Federico Silenzi, Luca Tagliafico. Dynamic Modelling of LNG Powered Combined Energy Systems in Port Areas. Energies. 2021; 14 (12):3640.

Chicago/Turabian Style

Davide Borelli; Francesco Devia; Corrado Schenone; Federico Silenzi; Luca Tagliafico. 2021. "Dynamic Modelling of LNG Powered Combined Energy Systems in Port Areas." Energies 14, no. 12: 3640.

Conference paper
Published: 27 March 2021 in Lecture Notes in Civil Engineering
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The present investigation addresses the issue of thermal insulation of building walls. In particular, the case of a wall subjected to Mediterranean climatic conditions, typical for the city of Genoa (Italy), is taken into account. A comparison between a polyurethane and a PCM layer with a thickness of 4 cm is proposed. The analysis is developed numerically by implementing a finite elements model of the wall in Comsol Multiphysics. The wall is subjected to real climatic conditions extracted from historical meteorological data and the thermal demand for heating and cooling is estimated. Both the polyurethane and the PCM have positive performances. In particular, polyurethane is more effective in reducing the heating demand, whereas PCM has better performances in reducing the cooling demand. A brief introduction to the life cycle analysis is also provided with the estimation of the energy pay-back for the two insulators and the results highlight better performance for the PCM, even though the pay-back periods of the two are quite similar.

ACS Style

Vincenzo Bianco; Annalisa Marchitto; Federico Scarpa; Luca A. Tagliafico. Application of PCMs to Improve Energy Efficiency in Residential Buildings. Lecture Notes in Civil Engineering 2021, 1 -12.

AMA Style

Vincenzo Bianco, Annalisa Marchitto, Federico Scarpa, Luca A. Tagliafico. Application of PCMs to Improve Energy Efficiency in Residential Buildings. Lecture Notes in Civil Engineering. 2021; ():1-12.

Chicago/Turabian Style

Vincenzo Bianco; Annalisa Marchitto; Federico Scarpa; Luca A. Tagliafico. 2021. "Application of PCMs to Improve Energy Efficiency in Residential Buildings." Lecture Notes in Civil Engineering , no. : 1-12.

Journal article
Published: 27 March 2020 in International Journal of Environmental Research and Public Health
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The present paper aims to introduce a top down methodology for the forecasting of residential energy demand in four European countries, namely Germany, Italy, Spain, and Lithuania. The methodology employed to develop the estimation is based on econometric techniques. In particular, a logarithmic dynamic linear constant relationship of the consumption is proposed. Demand is estimated as a function of a set of explaining variables, namely heating degree days and gross domestic product per capita. The results confirm that the methodology can be applied to the case of Germany, Italy, and Spain, whereas it is not suitable for Lithuania. The analysis of elasticities of the demand with respect to the gross domestic product per capita shows a negative value for Germany, −0.629, and positive values for Italy, 0.837, and Spain, 0.249. The forecasting of consumption shows that Germany and Italy are more sensitive to weather conditions with respect to Spain and an increase in the demand of 8% and 9% is expected in case of cold climatic conditions.

ACS Style

Vincenzo Bianco; Annalisa Marchitto; Federico Scarpa; Luca A. Tagliafico. Forecasting Energy Consumption in the EU Residential Sector. International Journal of Environmental Research and Public Health 2020, 17, 2259 .

AMA Style

Vincenzo Bianco, Annalisa Marchitto, Federico Scarpa, Luca A. Tagliafico. Forecasting Energy Consumption in the EU Residential Sector. International Journal of Environmental Research and Public Health. 2020; 17 (7):2259.

Chicago/Turabian Style

Vincenzo Bianco; Annalisa Marchitto; Federico Scarpa; Luca A. Tagliafico. 2020. "Forecasting Energy Consumption in the EU Residential Sector." International Journal of Environmental Research and Public Health 17, no. 7: 2259.

Journal article
Published: 23 October 2018 in Sensors
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Nowadays a recognized need for accurate observations of atmospheric aerosols (AEs) and reactive gases (RGs) exists in the framework of regional, national and global near-surface networks based on permanent or mobile measurement stations. In this context, a paramount and not-trivial issue is related to the correct execution of continuous sampling of ambient air and its subsequent distribution to measurement analyzers hosted inside the stations. Sampling artifacts must be minimized for obtaining reliable pictures of ambient air composition. To respond to this need, a suite of novel “smart” and relatively low-cost systems for the continuous sampling of ambient air was developed in the framework of the 2012–2015 I-AMICA Project. These systems were designed to execute AE and RG measurements according with WMO/GAW and ACTRIS recommendations and standard operation procedures. A particular attention was dedicated to the stabilization and control of the sampling flow rates and temperatures. The analysis of one full year of operations at the WMO/GAW regional station of Capo Granitola (GAW ID: CGR, Italy), allowed to conclude that these systems are effective in meeting the technical requirements for correct execution of AE and RG measurements.

ACS Style

Paolo Cristofanelli; Maurizio Busetto; Enrico Ronchi; Paolo Miatto; Angela Marinoni; Francescopiero Calzolari; Paolo Bonasoni; Luca A. Tagliafico. New “Smart” Systems for Atmospheric Aerosol and Reactive Gas Sampling in Ambient Air. Sensors 2018, 18, 3602 .

AMA Style

Paolo Cristofanelli, Maurizio Busetto, Enrico Ronchi, Paolo Miatto, Angela Marinoni, Francescopiero Calzolari, Paolo Bonasoni, Luca A. Tagliafico. New “Smart” Systems for Atmospheric Aerosol and Reactive Gas Sampling in Ambient Air. Sensors. 2018; 18 (11):3602.

Chicago/Turabian Style

Paolo Cristofanelli; Maurizio Busetto; Enrico Ronchi; Paolo Miatto; Angela Marinoni; Francescopiero Calzolari; Paolo Bonasoni; Luca A. Tagliafico. 2018. "New “Smart” Systems for Atmospheric Aerosol and Reactive Gas Sampling in Ambient Air." Sensors 18, no. 11: 3602.

Article
Published: 20 September 2018 in Scientometrics
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The aim of the present study is to provide an overview of the research activity, in terms of productivity and impact, of the Italian public universities and their academic staff in the engineering sector (EngSec), that is about seven thousand researchers. Beyond the increased bibliometric performance of the considered research area in the last decade, attention will be focused on the possible feedback on publication habits induced by regulations which progressively introduced, in the research world, strong competitiveness elements, such as evaluation exercises, covering both the single researcher career and the funding system. The effects of this feedback are also explored from the point of view of the self-citation phenomenon, which is said to increasingly affect the research world at large. The EngSec is analyzed both as a whole and decomposed in cultural areas to give a more comprehensive view of this important cultural segment of the academia. In 10 years, the productivity of the sector in term of Scopus documents is roughly doubled, with a consistent shift from conference papers to journal articles. The impact also showed a similar trend with self-citations exposing an evident peak in the year 2013.

ACS Style

Federico Scarpa; Vincenzo Bianco; Luca A. Tagliafico. The impact of the national assessment exercises on self-citation rate and publication venue: an empirical investigation on the engineering academic sector in Italy. Scientometrics 2018, 117, 997 -1022.

AMA Style

Federico Scarpa, Vincenzo Bianco, Luca A. Tagliafico. The impact of the national assessment exercises on self-citation rate and publication venue: an empirical investigation on the engineering academic sector in Italy. Scientometrics. 2018; 117 (2):997-1022.

Chicago/Turabian Style

Federico Scarpa; Vincenzo Bianco; Luca A. Tagliafico. 2018. "The impact of the national assessment exercises on self-citation rate and publication venue: an empirical investigation on the engineering academic sector in Italy." Scientometrics 117, no. 2: 997-1022.

Journal article
Published: 01 September 2014 in Applied Energy
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Degree days represent a versatile climatic indicator which is commonly used in building energy performance analysis.\ud In this context, the present paper proposes a simple dynamic model to simulate heating/cooling energy consumption in buildings. The model consists of several transient energy balance equations for external walls and internal air according to a lumped-capacitance approach and it has been implemented utilizing the Matlab/Simulink® platform. Results are validated by comparison to the outcomes of leading software packages, TRNSYS and Energy Plus.\ud By using the above mentioned model, energy consumption for heating/cooling is analyzed in different locations, showing that for low degree days the inertia effect assumes a paramount importance, affecting the common linear behavior of the building consumption against the standard degree days, especially for cooling energy demand.\ud Cooling energy demand at low cooling degree days (CDDs) is deeply analyzed, highlighting that in this situation other factors, such as solar irradiation, have an important role. To take into account these effects, a correction to CDD is proposed, demonstrating that by considering all the contributions the linear relationship between energy consumption and degree days is maintained

ACS Style

Mattia De Rosa; Vincenzo Bianco; Federico Scarpa; Luca Antonio Tagliafico. Heating and cooling building energy demand evaluation; a simplified model and a modified degree days approach. Applied Energy 2014, 128, 217 -229.

AMA Style

Mattia De Rosa, Vincenzo Bianco, Federico Scarpa, Luca Antonio Tagliafico. Heating and cooling building energy demand evaluation; a simplified model and a modified degree days approach. Applied Energy. 2014; 128 ():217-229.

Chicago/Turabian Style

Mattia De Rosa; Vincenzo Bianco; Federico Scarpa; Luca Antonio Tagliafico. 2014. "Heating and cooling building energy demand evaluation; a simplified model and a modified degree days approach." Applied Energy 128, no. : 217-229.

Articles
Published: 06 May 2014 in International Journal of Ambient Energy
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The aim of the present paper is to propose an analysis of energy consumption of a standard building in different climates. The analysis is developed by simulating the dynamic behaviour of the building subjected to different climatic conditions according to the considered location. Simulations are performed by means of an in-house developed code, validated by comparison with the outcomes from leading software, particularly TRNSYS and EnergyPlus. The use of a self-developed code guarantees a high flexibility and allows the implementation of new capabilities if necessary. The impact on the energy consumption of various parameters, namely internal and external wall insulation, window surface areas, thermal capacity and orientation, is investigated. Results show that the insulation of external walls has a fundamental role in reducing energy consumption, because it allows to exploit the thermal capacity of the walls. This is particularly useful for buildings which necessitate to keep the internal temperature constant.

ACS Style

Vincenzo Bianco; Mattia De Rosa; Federico Scarpa; Luca Antonio Tagliafico. Analysis of energy demand in residential buildings for different climates by means of dynamic simulation. International Journal of Ambient Energy 2014, 37, 1 -13.

AMA Style

Vincenzo Bianco, Mattia De Rosa, Federico Scarpa, Luca Antonio Tagliafico. Analysis of energy demand in residential buildings for different climates by means of dynamic simulation. International Journal of Ambient Energy. 2014; 37 (2):1-13.

Chicago/Turabian Style

Vincenzo Bianco; Mattia De Rosa; Federico Scarpa; Luca Antonio Tagliafico. 2014. "Analysis of energy demand in residential buildings for different climates by means of dynamic simulation." International Journal of Ambient Energy 37, no. 2: 1-13.

Journal article
Published: 01 May 2014 in Applied Thermal Engineering
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Traditional thermal solar panel technologies have limited efficiency and the required economic investments make them noncompetitive in the space heating market. The greatest limit to the diffusion of thermal solar systems is the characteristic temperatures they can reach: the strong connection between the user temperature and the collector temperature makes it possible to achieve high thermal (collector) efficiency only at low, often useless, user temperatures. By using solar collectors as thermal exchange units (evaporators) in a heat pump system (direct expansion solar assisted heat pump, DX-SAHP), the overall efficiency greatly increases with a significative cut of the associated investment in terms of pay-back time. In this study, an approach is proposed to the steady state analysis of DX-SAHP, which is based on the simplified inverse Carnot cycle and on the second law efficiency concept. This method, without the need of calculating the refrigerant fluid properties and the detailed processes occurring in the refrigeration device, allows us to link the main features of the plant to its relevant interactions with the surroundings. The very nature of the proposed method makes the relationship explicit and meaningful among all the involved variables. The paper, after the description of the method, presents an explanatory application of this technique by reviewing various aspects of the performance of a typical DX-SAHP in which the savings on primary energy consumption is regarded as the main feature of the plant and highlighted in a monthly averaged analysis. Results agree to those coming from a common standard steady state thermodynamic analysis. The application to a typical DX-SAHP system demonstrates that a mean saved primary energy of about 50% with respect to standard gas burner can be achieved for the same user needs. Such a result is almost independent from the type of flat plate solar panel used (double or single glazed, or even bare panels) as a result of using an optimal collector working temperature

ACS Style

Luca Antonio Tagliafico; Federico Scarpa; Federico Valsuani. Direct expansion solar assisted heat pumps – A clean steady state approach for overall performance analysis. Applied Thermal Engineering 2014, 66, 216 -226.

AMA Style

Luca Antonio Tagliafico, Federico Scarpa, Federico Valsuani. Direct expansion solar assisted heat pumps – A clean steady state approach for overall performance analysis. Applied Thermal Engineering. 2014; 66 (1-2):216-226.

Chicago/Turabian Style

Luca Antonio Tagliafico; Federico Scarpa; Federico Valsuani. 2014. "Direct expansion solar assisted heat pumps – A clean steady state approach for overall performance analysis." Applied Thermal Engineering 66, no. 1-2: 216-226.

Review
Published: 01 February 2014 in Renewable and Sustainable Energy Reviews
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The detailed analysis of a solar collector is a complex task, due to the high number of parameters affecting its\ud performance. In the last 40 years, several dynamic procedures have been developed and tested using numerical\ud approaches, to obtain the behavior of the thermal solar collector without performing the set of complicated and\ud expensive experimental tests usually adopted in steady-state approaches. Moreover, thanks to the improvement of the\ud computing performance, these numerical models provide useful tools in reproducing for complex system behavior. In\ud fact, when multiple energy sources are coupled together to build integrated systems (i.e. Solar-Assisted Heat Pumps,\ud Ground–Source Solar-Assisted Heat Pump, etc.) the dynamics of each equipment has an noticeable influence on the\ud behavior of the whole system. Therefore, these tools can be also profitably used to develop and optimize dynamic\ud control criteria for these systems. In this context, a great effort has been made in the last years to improve the predictive\ud potential of the dynamic models for solar collectors. Finally, thanks to the increase of the computational performance in\ud the last years, Computational Fluid-Dynamics approach (CFD) has become a powerful tool to investigate the heat\ud transfer phenomena. A lot of works have been made using both commercial and in-house developed codes,\ud investigating several aspects concerning the heat transfer mechanism ina solar collector.\ud In the present work, an updated review of models for flat-plate thermal solar collectors is presented, including a proper\ud classification and a description of their main characteristics and performance. A short description of the main works\ud involving CFD analysis on thermal solar collectors is reported too

ACS Style

Luca Antonio Tagliafico; Federico Scarpa; Mattia De Rosa. Dynamic thermal models and CFD analysis for flat-plate thermal solar collectors – A review. Renewable and Sustainable Energy Reviews 2014, 30, 526 -537.

AMA Style

Luca Antonio Tagliafico, Federico Scarpa, Mattia De Rosa. Dynamic thermal models and CFD analysis for flat-plate thermal solar collectors – A review. Renewable and Sustainable Energy Reviews. 2014; 30 ():526-537.

Chicago/Turabian Style

Luca Antonio Tagliafico; Federico Scarpa; Mattia De Rosa. 2014. "Dynamic thermal models and CFD analysis for flat-plate thermal solar collectors – A review." Renewable and Sustainable Energy Reviews 30, no. : 526-537.

Journal article
Published: 01 January 2014 in Applied Energy
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Objective\ud The aim of the present paper is to develop a model for the long term forecasting of nonresidential gas consumption in Italy. The influence of economic and climatic data, as well as the impact of regulatory changes are considered.\ud Methods\ud The model is developed by using a regression model and, to this scope, the necessary explaining variables are determined. A successful validation of the model is performed, showing that it guarantees a satisfactory level of accuracy.\ud Results\ud Short and long run elasticities are estimated, highlighting that Gross Domestic Product (GDP) per capita has a much greater influence on gas consumption with respect to price. Twenty-four consumption scenarios are presented, underlining that in 2030 nonresidential gas consumption in Italy is expected to be between about 32 and 46 bcm (billions of cubic meters).\ud Conclusions\ud It can be concluded that the increase of nonresidential gas consumption is strongly linked to the GDP evolution and according to the GDP growth scenario, nonresidential gas consumption might largely change.\ud Practice implications\ud The outcomes of the present analysis can be successfully utilized by energy managers to design appropriate energy management policies. Particularly, the determination of the elasticities has practical relevance in setting up adequate pricing policies, whereas the long term forecast represents a useful support to estimate the volume of the necessary supply contracts and to plan new infrastructures

ACS Style

Vincenzo Bianco; Federico Scarpa; Luca A. Tagliafico. Scenario analysis of nonresidential natural gas consumption in Italy. Applied Energy 2014, 113, 392 -403.

AMA Style

Vincenzo Bianco, Federico Scarpa, Luca A. Tagliafico. Scenario analysis of nonresidential natural gas consumption in Italy. Applied Energy. 2014; 113 ():392-403.

Chicago/Turabian Style

Vincenzo Bianco; Federico Scarpa; Luca A. Tagliafico. 2014. "Scenario analysis of nonresidential natural gas consumption in Italy." Applied Energy 113, no. : 392-403.

Journal article
Published: 01 December 2013 in Energy Conversion and Management
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ACS Style

Cecilia Rossi; Luca Antonio Tagliafico; Federico Scarpa; Vincenzo Bianco. Experimental and numerical results from hybrid retrofitted photovoltaic panels. Energy Conversion and Management 2013, 76, 634 -644.

AMA Style

Cecilia Rossi, Luca Antonio Tagliafico, Federico Scarpa, Vincenzo Bianco. Experimental and numerical results from hybrid retrofitted photovoltaic panels. Energy Conversion and Management. 2013; 76 ():634-644.

Chicago/Turabian Style

Cecilia Rossi; Luca Antonio Tagliafico; Federico Scarpa; Vincenzo Bianco. 2013. "Experimental and numerical results from hybrid retrofitted photovoltaic panels." Energy Conversion and Management 76, no. : 634-644.

Journal article
Published: 31 October 2013 in Solar Energy
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Design and control strategy suggestions for direct expansion solar assisted heat pump (DX-SAHP) water heaters are stated as a result of a novel steady-state primary energy consumption analysis based on a model developed around the fluid-independent Carnot cycle. The study is devoted to devices committed to hot sanitary water production and supplemented by an instantaneous gas burner. The paper addresses several suggestions about the correct design and the optimal working conditions needed to minimize the use of primary energy, based on averaged working conditions. The maximization of primary energy savings has been selected as the criterion to define our concept of “optimal performance” since this approach benefits from the use of a direct language that permits a larger, also non-specialized, audience to acquire the basic concepts of optimal behavior, increasing the transfer of knowledge to actual embodiments. Apart from the particular criterion selected in this study, the focus is on the proposed steady state approach which, without any use of refrigerant fluid properties, allows us to extract general rules as a function of the main features of the plant and of its relevant interactions with the surroundings, making all the relationship between the involved variables explicit and meaningful. Results obtained using the present approach agree with data coming from an already consolidated dynamic simulator.

ACS Style

Federico Scarpa; Luca Antonio Tagliafico; Vincenzo Bianco. A novel steady-state approach for the analysis of gas-burner supplemented direct expansion solar assisted heat pumps. Solar Energy 2013, 96, 227 -238.

AMA Style

Federico Scarpa, Luca Antonio Tagliafico, Vincenzo Bianco. A novel steady-state approach for the analysis of gas-burner supplemented direct expansion solar assisted heat pumps. Solar Energy. 2013; 96 ():227-238.

Chicago/Turabian Style

Federico Scarpa; Luca Antonio Tagliafico; Vincenzo Bianco. 2013. "A novel steady-state approach for the analysis of gas-burner supplemented direct expansion solar assisted heat pumps." Solar Energy 96, no. : 227-238.

Journal article
Published: 30 September 2013 in International Journal of Refrigeration
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A method is presented and tested which, implemented along with a lumped dynamical model of an inverse cycle, allows for the description of the system with very simple mathematical tools, without any need to possess information about the thermophysical properties of the refrigerant fluid operating in the cycle. The algorithm, based on the fluid independent Carnot cycle, is applied both to a household refrigerator and to a direct expansion, variable capacity, solar assisted heat pump (DX-SAHP). The validity of the approach is established by comparing the numerical results of the proposed simplified approach to transient and time averaged data based on consolidated thermodynamic-cycle simulators which make use of full standard fluid properties description. Simulations comparisons confirm the ability of the proposed model to closely adhere to the dynamic behavior of the considered devices and disclose the opportunity to develop inverse-cycle models so simple to be easily embedded, along with their sensitivity features, in cheap model-based regulators and transient control strategy developments.

ACS Style

Federico Scarpa; Luca Antonio Tagliafico; Vincenzo Bianco. Inverse cycles modeling without refrigerant property specification. International Journal of Refrigeration 2013, 36, 1716 -1729.

AMA Style

Federico Scarpa, Luca Antonio Tagliafico, Vincenzo Bianco. Inverse cycles modeling without refrigerant property specification. International Journal of Refrigeration. 2013; 36 (6):1716-1729.

Chicago/Turabian Style

Federico Scarpa; Luca Antonio Tagliafico; Vincenzo Bianco. 2013. "Inverse cycles modeling without refrigerant property specification." International Journal of Refrigeration 36, no. 6: 1716-1729.

Journal article
Published: 01 May 2013 in International Journal of Refrigeration
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The behavior of active magnetic regenerators (AMR) can be described by means of a one-dimensional set of equations. A lot of geometrical, thermo-physical and magnetic parameters influence the behavior and performance of an AMR, together with external controls and operating parameters. Literature data on AMR performances, both experimental and numerical, are given in different conditions and configurations, so that a consistent comparison among different results is not straightforward, and sometimes even not possible. In this paper the most relevant parameters are outlined, by means of a derivation of the dimensionless 1-D AMR equations. The resulting reduced number of key parameters simplifies the performance optimization procedure. Moreover, if the proposed dimensionless set of parameters is reported each time in corresponding scientific work, a comparison of experimental or/and numerical results would become much more feasible and easy to be performed

ACS Style

Giulio Tagliafico; Federico Scarpa; Luca Antonio Tagliafico. A dimensionless description of active magnetic regenerators to compare their performance and to simplify their optimization. International Journal of Refrigeration 2013, 36, 941 -949.

AMA Style

Giulio Tagliafico, Federico Scarpa, Luca Antonio Tagliafico. A dimensionless description of active magnetic regenerators to compare their performance and to simplify their optimization. International Journal of Refrigeration. 2013; 36 (3):941-949.

Chicago/Turabian Style

Giulio Tagliafico; Federico Scarpa; Luca Antonio Tagliafico. 2013. "A dimensionless description of active magnetic regenerators to compare their performance and to simplify their optimization." International Journal of Refrigeration 36, no. 3: 941-949.

Journal article
Published: 01 April 2013 in Applied Thermal Engineering
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A linear reciprocating magnetic refrigerator prototype was designed and built with the aid of an industrial partner. The refrigerator is based on the Active Magnetic Regenerative cycle, and exploits two regenerators working in parallel. The active material is Gadolinium in plates, 0.8 mm thick, for a total mass of 0.36 kg. The device is described and results about magnetic field and temperature span measurements are presented. The designed permanent magnet structure, based on an improved cross-type arrangement, generates a maximum magnetic field intensity of 1.55 T in air, over a gap of (13 50 100) mm3. The maximum temperature span achieved is 5.0 K, in a free run condition

ACS Style

Luca Antonio Tagliafico; Federico Scarpa; Federico Valsuani; Giulio Tagliafico. Preliminary experimental results from a linear reciprocating magnetic refrigerator prototype. Applied Thermal Engineering 2013, 52, 492 -497.

AMA Style

Luca Antonio Tagliafico, Federico Scarpa, Federico Valsuani, Giulio Tagliafico. Preliminary experimental results from a linear reciprocating magnetic refrigerator prototype. Applied Thermal Engineering. 2013; 52 (2):492-497.

Chicago/Turabian Style

Luca Antonio Tagliafico; Federico Scarpa; Federico Valsuani; Giulio Tagliafico. 2013. "Preliminary experimental results from a linear reciprocating magnetic refrigerator prototype." Applied Thermal Engineering 52, no. 2: 492-497.

Journal article
Published: 01 December 2012 in Energy and Buildings
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A steady state off-design model of a Water Solar Assisted Heat Pump (W-SAHP) and the results of monthly-based averaged simulations are presented. The W-SAHP system is arranged with a commercial water- towater heat pump, coupled with unglazed flat plate solar collectors. The study is purposely developed for swimming pools, however most of the analysis criteria and outcomes are valid for any building (user) having hot water needs. Calculations are made for given thermal load and user operating temperatures with reference to the climatic data of all Italian Municipalities, that is degree days (DD) in the range from 700 to 3000, altitude from 0 to 1500m (above sea level), and latitude from 36.5°N to 46.3°N. The primary energy saving capability of the W-SAHP solution, compared to a traditional gas-boiler plant, is analyzed as a function of the DD index of each site. Despite the large spread of climatic and altitude data, the results show that the W-SAHP performance are usually well correlated to DD, which can therefore be assumed as the main independent variable for the energy saving assessment of these systems, and make the results easily extended to other possible geographical locations

ACS Style

Luca A. Tagliafico; Federico Scarpa; Giulio Tagliafico; Federico Valsuani. An approach to energy saving assessment of solar assisted heat pumps for swimming pool water heating. Energy and Buildings 2012, 55, 833 -840.

AMA Style

Luca A. Tagliafico, Federico Scarpa, Giulio Tagliafico, Federico Valsuani. An approach to energy saving assessment of solar assisted heat pumps for swimming pool water heating. Energy and Buildings. 2012; 55 ():833-840.

Chicago/Turabian Style

Luca A. Tagliafico; Federico Scarpa; Giulio Tagliafico; Federico Valsuani. 2012. "An approach to energy saving assessment of solar assisted heat pumps for swimming pool water heating." Energy and Buildings 55, no. : 833-840.

Journal article
Published: 01 November 2012 in International Journal of Heat and Mass Transfer
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ACS Style

Federico Scarpa; G. Tagliafico; Luca Antonio Tagliafico. Control optimization in experiments for the heat transfer assessment of saturated packed bed regenerators. International Journal of Heat and Mass Transfer 2012, 55, 6944 -6950.

AMA Style

Federico Scarpa, G. Tagliafico, Luca Antonio Tagliafico. Control optimization in experiments for the heat transfer assessment of saturated packed bed regenerators. International Journal of Heat and Mass Transfer. 2012; 55 (23):6944-6950.

Chicago/Turabian Style

Federico Scarpa; G. Tagliafico; Luca Antonio Tagliafico. 2012. "Control optimization in experiments for the heat transfer assessment of saturated packed bed regenerators." International Journal of Heat and Mass Transfer 55, no. 23: 6944-6950.

Journal article
Published: 31 March 2012 in Applied Thermal Engineering
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In this study, a very simplified dynamic lumped model for the simulation of small-scale singletemperature vapor compression refrigerators working between two thermal sources with finite thermal capacity is presented. The model is compact enough to be employed in actual regulation systems, but adequate to describe the basic underlying physical phenomena relevant to the transient response of the refrigerated cell. The dynamic behavior of the system is simulated taking into account the main heat capacities involved in the heat transfer processes between the system, the refrigerating fluid and the outside. The numerical model has been validated by comparing the calculated results with transient experimental data coming from an instrumented chest-freezer. After a steady state tuning phase, the model was able to predict the transient temperature response of the cell with good accuracy

ACS Style

Luca Antonio Tagliafico; Federico Scarpa; Giulio Tagliafico. A compact dynamic model for household vapor compression refrigerated systems. Applied Thermal Engineering 2012, 35, 1 -8.

AMA Style

Luca Antonio Tagliafico, Federico Scarpa, Giulio Tagliafico. A compact dynamic model for household vapor compression refrigerated systems. Applied Thermal Engineering. 2012; 35 ():1-8.

Chicago/Turabian Style

Luca Antonio Tagliafico; Federico Scarpa; Giulio Tagliafico. 2012. "A compact dynamic model for household vapor compression refrigerated systems." Applied Thermal Engineering 35, no. : 1-8.

Journal article
Published: 01 March 2012 in International Journal of Refrigeration
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Magnetic refrigeration promises to be a breakthrough technology in the field of refrigeration\ud at room temperature. Several magnetic refrigerator prototypes have been developed\ud by research groups, with different embodiments and process thermodynamics. This short\ud paper follows an idealized line connecting, from a conceptual rather than historical point\ud of view, the different geometries, and proposes a classification based essentially on the\ud type of magnetic source, the type of magnetocaloric material, and the relative motion of\ud the active elements of the device. The proposed taxonomy is then applied to some\ud prototype presented in literature, showing its potential to give a comprehensive description\ud of magnetic refrigeration devices by means of a twelve digit string

ACS Style

F. Scarpa; G. Tagliafico; L.A. Tagliafico. Classification proposal for room temperature magnetic refrigerators. International Journal of Refrigeration 2012, 35, 453 -458.

AMA Style

F. Scarpa, G. Tagliafico, L.A. Tagliafico. Classification proposal for room temperature magnetic refrigerators. International Journal of Refrigeration. 2012; 35 (2):453-458.

Chicago/Turabian Style

F. Scarpa; G. Tagliafico; L.A. Tagliafico. 2012. "Classification proposal for room temperature magnetic refrigerators." International Journal of Refrigeration 35, no. 2: 453-458.