Luca A. Tagliafico

Luca A. Tagliafico
Università degli Studi di Genova | UNIGE · Dipartimento di Ingegneria Meccanica, Energetica, Gestionale e dei Trasporti (DIME)

Master Mechanical Engineering

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109
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Publications

Publications (109)
Article
The implementation of energy efficiency measures is an effective way to gain energy savings in the Italian residential sector. This paper assesses the embodied energy impact related to the envelope insulation and evaluates the energy and carbon payback of the efficiency measures. The proposed method consists of (1) an estimation of the baseline ope...
Article
Full-text available
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 consumpti...
Conference Paper
The plant in the Sport Palace “Carmine Romanzi” (Palacus, University of Genoa) consists of a Solar Assisted Heat Pump (SAHP) which integrates the two existing gas burners in the production of Domestic Hot Water (DHW) and Space Heating (SH). To manage the large number of control and measurement points along the installation, a data acquisition and c...
Article
This paper aims at introducing an approach for improving the renewable sources technologies inclusion in the municipality planning process and calls to revisit the current governance to strengthen the implementation effectiveness. The solar energy potential and the local energy requirements of the city of Riva Trigoso are analyzed and two types of...
Article
Purpose The purpose of this paper is to carry out a numerical investigation to study laminar convection flow of Al 2 O 3 -water nanofluids within a three-dimensional rectangular section channel asymmetrically heated. Design/methodology/approach A three-dimensional model of the channel is designed and simulated by using Comsol Multiphysics. The fin...
Conference Paper
This paper investigates a strategy for energy saving in the Italian residential sector that includes in the assessment the embodied energy related to the efficiency measures. Simulations are run in three main cities (Milan, Rome and Naples) covering different climate zones. The purpose is, firstly, to estimate the baseline of the buildings energy c...
Article
Full-text available
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...
Article
Full-text available
The main subject of this work is to understand what could happen in the Italian electricity market if a given share of building heating demand had switched from gas to electricity heating devices. The objective is to define the optimal share to switch in terms of minimization of environmental (CO2) emissions. The effects of such switching on the na...
Preprint
Full-text available
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...
Article
Full-text available
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 deca...
Article
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The main subject of this work is to understand what could happen in the Italian electricity market if a given share of building heating demand had switched from gas to electricity heating devices. The objective is to define the optimal share to switch in terms of minimization of environmental (CO2) emissions. The effects of such switching on the na...
Article
Full-text available
The present paper analyzes the Italian energy system focusing on the possible energy, environmental, and economic effects that the utilization of individual heat pumps for winter heating can produce. To this aim, a model of the Italian energy system is developed by employing the tool EnergyPLAN in order to develop an hourly simulation of the system...
Conference Paper
The present paper aims at assessing what would happen if a share of buildings heat demand switches from natural gas to electricity by using heat pumps. The objective is to assess which is the optimal share to switch in order to minimize carbon emissions. A bid stack model (BISM) is employed to perform a hourly simulation of the electricity market,...
Article
Full-text available
We propose a numerical analysis of developing forced laminar convection flow of Al2O3–water nanofluid within a two-dimensional rectangular section channel, heated on the top wall with a constant heat flux of 1000 W/m2. The problem is replicated with the finite-element method using Comsol Multiphysics commercial software. Different cases are simulat...
Article
The present paper proposes a numerical analysis on the developing forced laminar convection flow of Al2O3 water nanofluid within a two dimensional rectangular section channel heated on the top wall with a constant heat flux equal to 1000 W/m2. The problem is simulated by employing the finite elements method by utilizing the commercial software Coms...
Article
To evaluate the performance of solar thermal or photovoltaic systems, to perform a proper assessment of thermal environment inside buildings, but also in case of climatic long-term and weather short-term forecasting, solar radiation has to be decomposed in its diffuse and beam fractions to predict the correct amount of solar energy involved in a pa...
Article
Full-text available
Buildings heating is one of the main source of primary energy consumption, therefore there is a high pressure for finding solution able to reduce the consumption with consequent positive impacts on the environment. In the last years, it has been detected all around Europe an aggressive development of renewable energy sources in the electricity sect...
Article
Energy saving interventions for historical buildings require an accurate study on measures to be adopted and on the modalities of their application. This is in terms of energetic renovation with particular reference to historical, artistic and landscape profiles, considering that the substantial character and aesthetic aspects of the buildings are...
Article
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The present paper proposes an investigation on the application of Al2O3-water nanofluid within a PV/T panel in order to assess the potential to improve the performance of the device. The analysis has been carried out by developing a numerical model by means of the commercial software Comsol. Two dimensional nanofluids laminar convection flows for R...
Article
Full-text available
In many engineering applications, it is mandatory to know separately the solar radiation diffuse and direct components. Examples regard the assessment of the energy potentially exploitable by a system of solar thermal or photovoltaic panels and, in general, all the cases where it is necessary to calculate the radiative solar power collected by a su...
Article
Full-text available
Energy efficiency is one of the main pillars of the European energy strategy and it involves all the economic sectors. The present study proposes an analysis of the energy saving opportunities available in the Italian hotel sector, which has a relevant importance in the national context. The paper introduces a comprehensive model of the Italian hot...
Article
Full-text available
The present paper investigates possible primary energy savings deriving from the utilization of air to air heat pumps for building heating purposes. The energy input of heat pumps is generally represented by electricity and, in the last years, the share of renewables on the total electricity generation has grown in all the industrialized world, the...
Article
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Energy consumption in buildings is a relevant international topic driving policy measures for energy saving. In this context the Energy Efficiency Directive are mainly focused on the new building construction and renewable energy resources exploitation. On the other hand the potential of new buildings in Europe is very limited, if compared to exist...
Article
The present work presents an investigation regarding the feasibility analysis of a cogeneration plant for a food processing facility with the aim to decrease the cost of energy supply. The monthly electricity and heat consumption profiles are analyzed, in order to understand the consumption profiles, as well as the costs of the current furniture of...
Article
Nowadays, the exploitation of environmental exergy resources for heating purposes (solar energy, convection heat transfer from ambient air, moist air humidity condensation) by means of properly designed heat pump systems is a possible opportunity. In particular, the use of direct expansion solar assisted heat pumps (DX-SAHP) is investigated in this...
Article
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Software tools able to predict heating and cooling energy demand can effectively support the improvement of energy efficiency in buildings. The latest development of available technologies, such as free cooling and phase change materials, which exploit the building inertia effects, cannot be analyzed through the commonly used steady-state approache...
Article
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link to article (50 copies) http://www.tandfonline.com/eprint/SyJ3NbDqjMeZqzRWYwYD/full The aim of the present paper is to present an analysis of energy consumption of a standard building in different climates. The analysis is developed by simulating the dynamic behavior of the building subjected to different climatic conditions according to the co...
Article
Full-text available
Photovoltaic technology is a consolidated solution for electricity production in residential, commercial and industrial facilities. Despite that, the solar-to-electrical energy conversion is still low and many efforts are still needed in order to increase the panel efficiency. Since the photovoltaic modules performance decreases when the cell tempe...
Article
Full-text available
Energy efficiency of buildings has gained an important role with respect to possible energy saving policy measures, mainly for space heating demand which represents the dominant energy end-use. The present contribution addresses the problem of estimating building heating energy consumptions by using numerical models able to simulate the dynamic int...
Article
Full-text available
The identification of thermophysical properties of materials in dynamic experiments can be conveniently performed by the inverse solution of the associated heat conduction problem (IHCP). The inverse technique demands the knowledge of the initial temperature distribution within the material. As only a limited number of temperature sensors (or no se...
Article
Full-text available
free access until 18 July at http://authors.elsevier.com/a/1R6Pk4s9HvhLNO Magnetic refrigeration at room temperature is a promising technology with the potential of competing with traditional vapor compression technology. It promises high energy conversion efficiency values, and is environmental friendly. In fact it can operate with zero ODP (Ozon...
Conference Paper
Full-text available
The present paper reports an energy analysis connected with the study of an industrial plant of the food and beverage sector located in north Italy. An on-field activity is developed to obtain the consumption data related to natural gas and electricity with a monthly granularity. Different indexes are determined and analysed in order to have a clea...
Article
Full-text available
Models of ground source heat pump (GSHP) systems are used as an aid for the correct design and optimization of the system. For this purpose, it is necessary to develop models which correctly reproduce the dynamic thermal behavior of each component in a short-term basis. Since the borehole heat exchanger (BHE) is one of the main components, special...
Article
Full-text available
The aim of the present research is to evaluate future primary energy consumption in the Italian thermoelectric sector. Despite its importance in the European context, researches addressing the primary energy consumption in the Italian power sector are not available in the literature. Therefore, to bridge this gap, a detailed representation of the p...
Article
Full-text available
In this paper, a direct expansion solar assisted heat pump (DX-SAHP) is investigated as one of the possible low environmental impact solutions to the domestic thermal energy demand, even if due to some technological and control strategy limitations, the DX-SAHP systems do not have a competitive role in the actual renewable energy market. An instrum...
Article
Full-text available
Gas market in Europe is experiencing a radical change due to different reasons, partially determined and accelerated by economic downturn of the last period. In the past years many European countries adopted energy policies largely based on the utilization of natural gas, in fact a sharp increase of the demand was observed and, at the same time, a...
Article
Full-text available
Degree days (DD) represent a versatile climatic indicator which is commonly used in the analysis of building energy performance, as e.g. (i) to perform energetic assessment of existent and new buildings, (ii) to analyze the territory energy consumption, (iii) to develop scenario analyses in terms of energy consumption forecasting, and so on. Diffe...
Article
Full-text available
In this paper, a direct expansion solar assisted heat pump (DX-SAHP) is investigated as one of the possible low environmental impact solutions to the domestic thermal energy demand, even if due to some technological and control strategy limitations, the DX-SAHP systems do not have a competitive role in the actual renewable energy market. An instrum...
Article
Full-text available
The correct design and optimization of complex energy systems requires the ability to reproduce the dynamic thermal behavior of each system component. In ground source heat pump (GSHP) systems, modelling the borehole heat exchangers (BHE) dynamic response is especially relevant in the development of control strategies for energy optimization purpos...
Article
Full-text available
The aim of the present paper is to evaluate the future consumption of natural gas in the Italian residential sector. The historical pattern of the consumption is reported and analyzed in order to identify the consumption drivers. It is found that natural gas consumption is influenced by gross domestic product per capita (GDP per capita), gas price...
Conference Paper
Full-text available
The aim of present study is to investigate different methodologies to retrofit photovoltaic modules (PV), in order to ensure a good cooling effect by adding a thermal plate in the back side of the PV panel to collect heat, thus obtaining a thermal photovoltaic module (PVT). The most promising perspective of this technology is to couple it with a he...
Article
Full-text available
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 temperat...
Article
Full-text available
Degree days represent a versatile climatic indicator which is commonly used in building energy performance analysis. 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 acco...
Article
Full-text available
The detailed analysis of a solar collector is a complex task, due to the high number of parameters affecting its performance. In the last 40 years, several dynamic procedures have been developed and tested using numerical approaches, to obtain the behavior of the thermal solar collector without performing the set of complicated and expensive experi...
Article
Full-text available
Objective: 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. Methods: The model is developed by using a regression model and, to this scope, the necessary explaining vari...
Article
The aim of the present paper is to present an analysis of heating energy consumption of a standard building in different climates. The analysis is developed by simulating the dynamic behavior of the building subjected to different climatic conditions according to the considered location. Simulations are performed by means of an in-house developed c...
Article
Full-text available
The aim of present study is to investigate different methodologies to retrofit photovoltaic modules (PV), in order to ensure a good cooling effect by adding a thermal plate in the back side of the PV panel to collect heat, thus obtaining a thermal photovoltaic module (PVT). The most promising perspective of this technology is to couple it with a he...
Article
Full-text available
The aim of present study is to investigate different methodologies to achieve a better contact between a photovoltaic panel and a thermal plate, in order to cool the PV panel by means of water in the perspective of coupling it with a heat pump. It is believed that this kind of system allows to obtain a higher energy efficiency. The analysis is deve...
Article
Full-text available
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 suppleme...
Article
Full-text available
http://www.sciencedirect.com/science/article/pii/S0140700713000789 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...
Article
Full-text available
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 numer...
Article
SUMMARY Liquefied natural gas (LNG) vaporization facilities offer an excellent opportunity of primary energy saving by means of integration with power conversion units that is still weakly exploited in actual installations. This work focuses on the evaluation of primary energy saving achievable by the integration of an LNG vaporization facility wit...
Article
Full-text available
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-to-water heat pump, coupled with unglazed flat plate solar collectors. The study is purposely developed for swimming pools, however most of the analys...
Article
Full-text available
Many studies about heat transfer characterization of single phase fixed bed matrix regenerators are devoted to the finding of experimental correlations. Despite several deep investigations, the emerged correlations are not well established, indeed the high complexity of the processes involved, the shape of the solid-fluid interface, the complexity...