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Dr. Paolo Congedo
Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy

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Technical and economic analysis for the energy efficiency of buildings

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Journal article
Published: 03 August 2021 in Energy
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Zero Energy Buildings (ZEBs) are expected to play a significant role in reducing energy consumption and combating climate change. Despite this awareness, there is a lack of approaches and indicators at the regulatory level to quantify the long-term potential of strategies applied to buildings today. This study concerns the dynamic thermal modeling over the years, until 2080, of a multi-residential building located in Lecce, a city in southeastern Italy, characterized by a Mediterranean hot summer climate. Over time, Italian legislation has brought increasingly stringent limits on the design of the building envelope. Although with different regulatory limits, in the different climates across Italy, a growing trend towards a more insulated envelope, characterized by very low transmittances, has been observed over the years. This study shows how, in hot climates, buildings constructed within the legal limits will suffer from overheating over the years, necessarily leading to a disproportionate, and more extensive, use of cooling systems throughout the year. This study proposes a critical analysis of the long-term effectiveness of national strategies applied to the building envelope to date to achieve the ZEB goal, emphasizing that long-term predictive analyses become relevant in current building design and should be considered in regulations.

ACS Style

Cristina Baglivo; Paolo Maria Congedo; Graziano Murrone; Dalila Lezzi. Long-term predictive energy analysis of a high-performance building in a mediterranean climate under climate change. Energy 2021, 238, 121641 .

AMA Style

Cristina Baglivo, Paolo Maria Congedo, Graziano Murrone, Dalila Lezzi. Long-term predictive energy analysis of a high-performance building in a mediterranean climate under climate change. Energy. 2021; 238 ():121641.

Chicago/Turabian Style

Cristina Baglivo; Paolo Maria Congedo; Graziano Murrone; Dalila Lezzi. 2021. "Long-term predictive energy analysis of a high-performance building in a mediterranean climate under climate change." Energy 238, no. : 121641.

Journal article
Published: 26 July 2021 in Energies
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This work proposes a new device for air treatment with dehumidification and water recovery/storage, with possible mitigation of indoor environmental conditions. The system is based on Peltier cells coupled with a horizontal earth-to-air heat exchanger, it is proposed as an easy-to-implement alternative to the heat pumps and air handling units currently used on the market, in terms of cost, ease of installation, and maintenance. The process provides the water collection from the cooling of warm-humid air through a process that leads to condensation and water vapor separation. The airflow generated by a fan splits into two dual flows that lap the two surfaces of the Peltier cells, one flow laps the cold surfaces undergoing sensible, latent cooling with dehumidification; the other flow laps the hot surfaces and heats up. The airflow undergoes thermal pre-treatment through the underground horizontal geothermal pipe that precedes the Peltier cells. In the water storage tank, which also works as a mixing chamber, the two air streams are mixed to regulate the outlet temperature. The system can be stand-alone if equipped with a photovoltaic panel and a micro wind turbine, able to be used in places where electricity is absent. The system, with different configurations, is modeled in the African city Kigali, in Rwanda.

ACS Style

Paolo Congedo; Cristina Baglivo; Giulia Negro. A New Device Hypothesis for Water Extraction from Air and Basic Air Condition System in Developing Countries. Energies 2021, 14, 4507 .

AMA Style

Paolo Congedo, Cristina Baglivo, Giulia Negro. A New Device Hypothesis for Water Extraction from Air and Basic Air Condition System in Developing Countries. Energies. 2021; 14 (15):4507.

Chicago/Turabian Style

Paolo Congedo; Cristina Baglivo; Giulia Negro. 2021. "A New Device Hypothesis for Water Extraction from Air and Basic Air Condition System in Developing Countries." Energies 14, no. 15: 4507.

Journal article
Published: 20 July 2021 in Applied Sciences
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Ensuring optimum interior lighting is a topic of great importance, as this influences not only the well-being of users but also the optimal performance of visual tasks. Lighting can be natural, but if not sufficient, it can be compensated with artificial lighting. This study highlights a methodology for designing a new lighting system that takes into account both technical and economic aspects. The method was applied to an existing school located in southern Italy, in which the electricity consumption is related to the current lighting system. The school is chosen as being representative of the construction type and layout of many local schools. In addition, the coexistence of several visual tasks with different design requisites (e.g., illuminance levels) makes the school a very complex environment. The school lighting is modelled in Google SketchUp and imported into Daysim to simulate the yearly and hourly daylight indoor contribution. Dialux Evo has been used to simulate and design artificial lighting. The results show a reduction of energy consumption of 33% with the simple replacement of fluorescent luminaires with LEDs, while the LED lamp dimming and modulation for rows of luminaires leads to a 95% reduction in energy consumption compared with the current state.

ACS Style

Cristina Baglivo; Marina Bonomolo; Paolo Congedo; Marco Beccali; Simona Antonaci. Technical-Economic Evaluation of the Effectiveness of Measures Applied to the Artificial Lighting System of a School. Applied Sciences 2021, 11, 6664 .

AMA Style

Cristina Baglivo, Marina Bonomolo, Paolo Congedo, Marco Beccali, Simona Antonaci. Technical-Economic Evaluation of the Effectiveness of Measures Applied to the Artificial Lighting System of a School. Applied Sciences. 2021; 11 (14):6664.

Chicago/Turabian Style

Cristina Baglivo; Marina Bonomolo; Paolo Congedo; Marco Beccali; Simona Antonaci. 2021. "Technical-Economic Evaluation of the Effectiveness of Measures Applied to the Artificial Lighting System of a School." Applied Sciences 11, no. 14: 6664.

Journal article
Published: 09 February 2021 in Energies
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This paper proposes a critical review of the different aspects concerning magnetic refrigeration systems, and performs a detailed analysis of thermodynamic cycles, using mathematical models found in the literature. Langevin’s statistical mechanical theory faithfully describes the physical operation of a refrigeration machine working according to a magnetic Ericsson cycle. Results of mathematical and real experimental models are compared to deduce which best describes the Ericsson cycle. The theoretical data are not perfectly consistent with the experimental data; there is a maximum deviation of about 30%. Numerical and experimental data confirm that very high Coefficient of Performance (COP) values of more than 20 can be achieved. The analysis of the Brayton cycle consisted of finding the mathematical model that considers the irreversibility of these machines. Starting from the thermodynamic properties of magnetocaloric materials based on statistical mechanics, the efficiency of an irreversible Brayton regenerative magnetic refrigeration cycle is studied. Considering the irreversibility in adiabatic transformations, the lower limit of the optimal ratio of two magnetic fields is determined, obtaining a valid optimization criterion for these machines operating according to a Brayton cycle. The results show that the Ericsson cycle achieves a higher Coefficient of Performance than the Brayton cycle, which has a higher cooling capacity as it operates with a larger temperature difference between the magnetocaloric material and source.

ACS Style

Cristina Baglivo; Paolo Congedo; Pasquale Donno. Analysis of Thermodynamic Cycles of Heat Pumps and Magnetic Refrigerators Using Mathematical Models. Energies 2021, 14, 909 .

AMA Style

Cristina Baglivo, Paolo Congedo, Pasquale Donno. Analysis of Thermodynamic Cycles of Heat Pumps and Magnetic Refrigerators Using Mathematical Models. Energies. 2021; 14 (4):909.

Chicago/Turabian Style

Cristina Baglivo; Paolo Congedo; Pasquale Donno. 2021. "Analysis of Thermodynamic Cycles of Heat Pumps and Magnetic Refrigerators Using Mathematical Models." Energies 14, no. 4: 909.

Journal article
Published: 16 July 2020 in Energies
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Greenhouse crops represent a significant productive sector of the agricultural system; one of the main problems to be addressed is indoor air conditioning to ensure thermal well-being of crops. This study focuses on the ventilation analysis of solar greenhouse with symmetrical flat pitched roof and single span located in a warm temperate climate. This work proposes the dynamic analysis of the greenhouse modeled in TRNsys, simultaneously considering different thermal phenomena three-dimensional (3D) shortwave and longwave radiative exchange, airflow exchanges, presence of lamps with their exact 3D position, ground and plant evapotranspiration, and convective heat transfer coefficients. Several air conditioning systems were analyzed, automatic window opening, controlled mechanical ventilation systems (CMV) and horizontal Earth-to-Air Heat Exchanger (EAHX) coupled with CMV, for different air volume changes per hour. In summer, the exploitation of the ground allows having excellent results with the EAHX system, reducing the temperature peaks of up to 5 °C compared to the use of CMV. In winter, it is interesting to note that, although the EAHX is not the solution that raises the temperature the most during the day, its use allows flattening the thermal wave more. In fact, the trend is almost constant during the day, raising the temperature during the first and last hours of the day.

ACS Style

Sara Bonuso; Simone Panico; Cristina Baglivo; Domenico Mazzeo; Nicoletta Matera; Paolo Maria Congedo; Giuseppe Oliveti. Dynamic Analysis of the Natural and Mechanical Ventilation of a Solar Greenhouse by Coupling Controlled Mechanical Ventilation (CMV) with an Earth-to-Air Heat Exchanger (EAHX). Energies 2020, 13, 3676 .

AMA Style

Sara Bonuso, Simone Panico, Cristina Baglivo, Domenico Mazzeo, Nicoletta Matera, Paolo Maria Congedo, Giuseppe Oliveti. Dynamic Analysis of the Natural and Mechanical Ventilation of a Solar Greenhouse by Coupling Controlled Mechanical Ventilation (CMV) with an Earth-to-Air Heat Exchanger (EAHX). Energies. 2020; 13 (14):3676.

Chicago/Turabian Style

Sara Bonuso; Simone Panico; Cristina Baglivo; Domenico Mazzeo; Nicoletta Matera; Paolo Maria Congedo; Giuseppe Oliveti. 2020. "Dynamic Analysis of the Natural and Mechanical Ventilation of a Solar Greenhouse by Coupling Controlled Mechanical Ventilation (CMV) with an Earth-to-Air Heat Exchanger (EAHX)." Energies 13, no. 14: 3676.

Journal article
Published: 06 July 2020 in Applied Thermal Engineering
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Greenhouse technology is an important energy consumer sector representing an indispensable solution for modern methods of crop production. In the greenhouse envelope and system design phase, thermodynamic performance simulation tools are required. The greenhouse simulation is still a very complex task despite many building tools are available in the literature. This work aims to overcome this gap by proposing a reference methodology to accommodate the building TRNSYS software for a greenhouse able to consider simultaneously different thermal phenomena with detailed modelling of: dense volume discretization, 3D shortwave and longwave radiative exchange, air flow exchanges, presence of lamps with their exact 3D position, ground and plant evapotranspiration, and convective heat transfer coefficients. A standard hourly simulation of the one-zone greenhouse was validated with another recognized tool, showing excellent agreement throughout the year. The main parameters affecting the greenhouse thermal balance were investigated in both a free-floating and continuous regime. The investigation has shown that a standard simulation is accurate to only reproduce the thermal response in a free-floating regime; instead, the detailed simulation has led to overall cooling and heating energy needs in the continuous regime, respectively, of 51.4 kWh/m3 and 49.1 kWh/m3, avoiding to obtain very high errors.

ACS Style

Cristina Baglivo; Domenico Mazzeo; Simone Panico; Sara Bonuso; Nicoletta Matera; Paolo Maria Congedo; Giuseppe Oliveti. Complete greenhouse dynamic simulation tool to assess the crop thermal well-being and energy needs. Applied Thermal Engineering 2020, 179, 115698 .

AMA Style

Cristina Baglivo, Domenico Mazzeo, Simone Panico, Sara Bonuso, Nicoletta Matera, Paolo Maria Congedo, Giuseppe Oliveti. Complete greenhouse dynamic simulation tool to assess the crop thermal well-being and energy needs. Applied Thermal Engineering. 2020; 179 ():115698.

Chicago/Turabian Style

Cristina Baglivo; Domenico Mazzeo; Simone Panico; Sara Bonuso; Nicoletta Matera; Paolo Maria Congedo; Giuseppe Oliveti. 2020. "Complete greenhouse dynamic simulation tool to assess the crop thermal well-being and energy needs." Applied Thermal Engineering 179, no. : 115698.

Journal article
Published: 30 May 2020 in Energy Conversion and Management
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There is not a real “storage market” and the range of technical solutions for electrical storage appears to be underdeveloped. The use of electrochemical batteries seems to be the easiest and cheapest way, but some problems related to disposal, average life span and storage capacity, still put a brake on their diffusion. The micro CAES-TES (Compressed Air Energy Storage – Thermal Energy Storage) systems with small renewable energy plants for cogeneration and trigeneration represent an important development perspective thank to the reuse of the heat generated at the stage of air compression (for heating) and air expansion (for cooling). This improves the complexity of the entire system because of the heat exchange and thermal storage units must match the capacities and performances of the air compression/expansion units. The paper presents a new mathematical model for micro CAES-TES systems, implemented in Matlab software environment. The novelty is the use of air compressed energy storage in small and residential applications, a trigeneration due to reuse of heat from air compression and expansion stage, only renewable energy used. By keeping the initial investment low, the analysis is extended to the optimal system configuration and identifies key parameters that have a dominant influence on improving system efficiency and provides useful guidance for CAES-TES system design. The results show that, for an air storage volume of 4 m3, the optimal configuration is with a compression ratio of 15 splitted in two stages, charging time 5 h, mechanical storage efficiency 48%, compression air flow rate 3.73 kg/hour. The proposed system has a possible future development overall if combined with new possible scenarios of direct use of compressed air in the residential sector.

ACS Style

Paolo Maria Congedo; Cristina Baglivo; Lorenzo Carrieri. Hypothesis of thermal and mechanical energy storage with unconventional methods. Energy Conversion and Management 2020, 218, 113014 .

AMA Style

Paolo Maria Congedo, Cristina Baglivo, Lorenzo Carrieri. Hypothesis of thermal and mechanical energy storage with unconventional methods. Energy Conversion and Management. 2020; 218 ():113014.

Chicago/Turabian Style

Paolo Maria Congedo; Cristina Baglivo; Lorenzo Carrieri. 2020. "Hypothesis of thermal and mechanical energy storage with unconventional methods." Energy Conversion and Management 218, no. : 113014.

Journal article
Published: 20 April 2020 in Geothermics
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Geothermal energy has a huge potential in building applications. This paper proposes the use of an Air-Source Heat Pump (ASHP) system coupled with a Horizontal Earth-To-Air Heat Exchanger (EAHX) to reduce energy consumption in buildings. The novelty is to geothermally pre-heat or pre-cool the air source of the ASHP through the EAHX, reducing the electric power needed, keeping constant heating/cooling capacity. The behaviour of ASHP-EAHX system has been investigated by a numerical model implemented in TRNSYS. A total of 54 combinations have been obtained and tested varying ground thermal properties, burial depth, air flow rate and pipe length. The model has been validated with a real case showing a good agreement between simulated and monitored data. The study is focused on the city of Turin (North of Italy), compared with Brindisi (South of Italy), and extremely cold and hot climates like Tromsø (Norway) and Béchar (Algeria), respectively. The ASHP-EAXH performance has been investigated, by the comparison with the traditional ASHP, using different coefficients, such as the Coefficient of Performance (COP), the Energy Efficiency Ratio (EER), the Seasonal Coefficient of Performance (SCOP), and the Seasonal Energy Efficiency Ratio (SEER). The paper reveals how the ASHP-EAHX system show higher performance compared to the traditional ASHP, in all seasons. The overall merit is, for cold extremely climate, the reduction of the shutdown periods, when the outside temperature is below the limit operating temperature, and to allow the extension of the use of the heat pump to locations, where it is currently not convenient for the average outside temperature lower than the limit operating temperature of the heat pump.

ACS Style

Paolo Maria Congedo; Cristina Baglivo; Sara Bonuso; Delia D’Agostino. Numerical and experimental analysis of the energy performance of an air-source heat pump (ASHP) coupled with a horizontal earth-to-air heat exchanger (EAHX) in different climates. Geothermics 2020, 87, 101845 .

AMA Style

Paolo Maria Congedo, Cristina Baglivo, Sara Bonuso, Delia D’Agostino. Numerical and experimental analysis of the energy performance of an air-source heat pump (ASHP) coupled with a horizontal earth-to-air heat exchanger (EAHX) in different climates. Geothermics. 2020; 87 ():101845.

Chicago/Turabian Style

Paolo Maria Congedo; Cristina Baglivo; Sara Bonuso; Delia D’Agostino. 2020. "Numerical and experimental analysis of the energy performance of an air-source heat pump (ASHP) coupled with a horizontal earth-to-air heat exchanger (EAHX) in different climates." Geothermics 87, no. : 101845.

Journal article
Published: 13 November 2019 in Energies
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A light pipe is an excellent solution to transport and distribute daylight into environments without or with little lighting, guaranteeing comfort inside the rooms. As stated in the literature, the evaluation of the performances of light pipes presents numerous complexities, making the work very difficult for technicians and designers. This study is aimed to present a methodology that is able to identify the potential of light pipes using indices such as daylight autonomy (DA), continuous daylight autonomy (DAc), and useful daylight illuminance (UDI). This paper presents an analysis of daylight obtained by several configurations of simple models of light pipes installed into a 5 × 5 m plant area room. All simulations are carried out in a DAYSIM environment, which allows calculating the annual availability of daylight based on a RADIANCE raytracer backward. Several daylight conditions were analyzed for different light pipe configurations, considering different pipe lengths and a variable number of light pipes. The light pipes are tested also in the horizontal position, for different orientations. The results of all the combinations were compared with the performances of a window with dimensions equal to 1/8 of the internal surface, which was in accordance with the minimum value to be guaranteed by the Italian Regulation (D.M. 5 July 1975 n. 190) for different orientations. The results indicated a difference in daylight distribution, showing a strong correlation between the percentage levels of DA and DAc with the length and number of pipes, during different periods of the year. The simulated model is strongly influenced by the aspect ratio (R = diameter/length). The results show that the illuminance levels decrease drastically, increasing the length.

ACS Style

Cristina Baglivo; Marina Bonomolo; Paolo Maria Congedo. Modeling of Light Pipes for the Optimal Disposition in Buildings. Energies 2019, 12, 4323 .

AMA Style

Cristina Baglivo, Marina Bonomolo, Paolo Maria Congedo. Modeling of Light Pipes for the Optimal Disposition in Buildings. Energies. 2019; 12 (22):4323.

Chicago/Turabian Style

Cristina Baglivo; Marina Bonomolo; Paolo Maria Congedo. 2019. "Modeling of Light Pipes for the Optimal Disposition in Buildings." Energies 12, no. 22: 4323.

Journal article
Published: 05 March 2019 in Journal of Building Engineering
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The international scientific community believes unequivocally that, at the origin of the climate change, there are anthropic factors mainly linked to the construction sector and to the disproportionate use of fossil energy sources. The selection of building materials plays a key role in the reduction of energy consumption, especially in the Mediterranean area, where the internal overeating risk is high if the solar radiation is not controlled and the free supply of internal heat is poorly managed. Traditionally, in the Italian context, the slab-on-ground floor is made in concrete or more rarely in stone. However, it is usually recommended to minimize the use of concrete as it has a strong environmental impact, reinforced concrete is still the most recommended solution for foundations, both for regulatory and practical reasons. The present study proposes a methodology for the design of high efficiency slab-on-ground floor for warm climate through optimization code performed with the software modeFRONTIER. Starting from the traditional floor structures, the multi-objective methodology stands as an advanced step for the identification of new configurations, favoring the management of many variables, such as thermal, environmental and economic aspects. The results are characterized by high presence of local and eco-friendly materials and reduced costs. At the end, this work demonstrates that it is possible to obtain high performance solutions with also very few numbers of layers.

ACS Style

Cristina Baglivo; Paolo Maria Congedo. Optimization of high efficiency slab-on-ground floor by multi-objective analysis for zero energy buildings in mediterranean climate. Journal of Building Engineering 2019, 24, 100733 .

AMA Style

Cristina Baglivo, Paolo Maria Congedo. Optimization of high efficiency slab-on-ground floor by multi-objective analysis for zero energy buildings in mediterranean climate. Journal of Building Engineering. 2019; 24 ():100733.

Chicago/Turabian Style

Cristina Baglivo; Paolo Maria Congedo. 2019. "Optimization of high efficiency slab-on-ground floor by multi-objective analysis for zero energy buildings in mediterranean climate." Journal of Building Engineering 24, no. : 100733.

Journal article
Published: 27 February 2019 in Geothermics
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A large part of primary energy is used for heating and cooling the buildings. The exploitation of renewable resources in the building sector is still critical to ensure a high level of energy and environmental sustainability. Nowadays, a great attention is focused on geothermal energy, which reduces heating and cooling in buildings, allowing natural pre-heating and pre-cooling of the inlet air. The effect of different burial depth and thermal conductivity of ground on thermal performance of HAGHE under transient conditions has been analyzed. The results show that the transient thermal performance of HAGHE is independent from the thermal conductivity of the ground but is dependent on burial depth. In this work, it is presented the experimental validation of a mathematical model implemented by the CFD Fluent for the simulation of heat exchange that takes place within a HAGHE for geothermal heat pumps. The validation of the model is based on a comparison between the experimental data, obtained from the software, and real data, for a HAGHE located in the town of Rubiana (Turin-Italy).

ACS Style

Paolo Maria Congedo; Caterina Lorusso; Cristina Baglivo; Marco Milanese; Luca Raimondo. Experimental validation of horizontal air-ground heat exchangers (HAGHE) for ventilation systems. Geothermics 2019, 80, 78 -85.

AMA Style

Paolo Maria Congedo, Caterina Lorusso, Cristina Baglivo, Marco Milanese, Luca Raimondo. Experimental validation of horizontal air-ground heat exchangers (HAGHE) for ventilation systems. Geothermics. 2019; 80 ():78-85.

Chicago/Turabian Style

Paolo Maria Congedo; Caterina Lorusso; Cristina Baglivo; Marco Milanese; Luca Raimondo. 2019. "Experimental validation of horizontal air-ground heat exchangers (HAGHE) for ventilation systems." Geothermics 80, no. : 78-85.

Journal article
Published: 04 January 2019 in Renewable Energy
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A numerical method, called WEST (Wind Energy Study of Territory), has been used to study and evaluate the wind energy potential of 5 windfarms in Apulia Region (Italy). This model, based on historical meteorological and geophysical data, allows characterizing anemometric fields of a territory and, therefore, calculating its wind power potential. In this work, to evaluate turbulence effects of mutual interferences between wind turbines within the windfarms, a wake loss model based on the assumption “relative wind speed evolution equal to pollutant evolution” has been applied by means of WEST. In the cases under investigation, the results confirm the new proposed methodology as acceptable way for windfarm analysis and show that the wind-shadow effect, being confined within the first 500 m downstream of wind turbines, can be considered negligible with respect to other factors, as morphology of land and turbine rotor diameter.

ACS Style

Marco Milanese; Paolo Maria Congedo; Gianpiero Colangelo; Roberta Lala; Domenico Laforgia; Arturo de Risi. Numerical method for wind energy analysis in WTG siting. Renewable Energy 2019, 136, 202 -210.

AMA Style

Marco Milanese, Paolo Maria Congedo, Gianpiero Colangelo, Roberta Lala, Domenico Laforgia, Arturo de Risi. Numerical method for wind energy analysis in WTG siting. Renewable Energy. 2019; 136 ():202-210.

Chicago/Turabian Style

Marco Milanese; Paolo Maria Congedo; Gianpiero Colangelo; Roberta Lala; Domenico Laforgia; Arturo de Risi. 2019. "Numerical method for wind energy analysis in WTG siting." Renewable Energy 136, no. : 202-210.

Journal article
Published: 01 November 2018 in Energies
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The building sector is responsible for a large part of the overall energy demand in Europe. Energy consumption may be reduced at the design stage by selecting the proper building elements. This study develops a multi-objective analysis for a highly efficient slab-on-ground floor, whose design is optimized for a warm climate. Possible floor configurations have been obtained using the software tools modeFRONTIER, for the multi-objective analysis, and MATLAB, for the computational code. To proceed with the optimization of the different floor layers, a dataset has been developed for several materials in relation to a number of parameters: thermo-physical properties, eco-sustainability score according to the ITACA Protocol, costs, source, and structural features. Results highlight how a high surface mass is preferable when guaranteed by concrete in the innermost and outermost layers. Furthermore, insulating materials are better placed in the middle layers, with the insulating and synthetic materials adjacent to the ground and insulating and natural materials adjacent to the floor. Results emphasize the importance of thermal transmittance close to the Italian regulation limit (0.38 W/m2 K) in the climatic zone C, to allow an adequate exchange with the ground in summer, avoiding overheating. The outcomes show that the obtained slab-on-ground floor configurations favor the use of local, recyclable, sustainable, and eco-friendly materials, which is in line with energy policies and sustainability protocols. The paper supports the decision making process that takes many variables into account at the building design stage.

ACS Style

Cristina Baglivo; Paolo Maria Congedo; Delia D’Agostino. Multi-Objective Analysis for the Optimization of a High Performance Slab-on- Ground Floor in a Warm Climate. Energies 2018, 11, 2988 .

AMA Style

Cristina Baglivo, Paolo Maria Congedo, Delia D’Agostino. Multi-Objective Analysis for the Optimization of a High Performance Slab-on- Ground Floor in a Warm Climate. Energies. 2018; 11 (11):2988.

Chicago/Turabian Style

Cristina Baglivo; Paolo Maria Congedo; Delia D’Agostino. 2018. "Multi-Objective Analysis for the Optimization of a High Performance Slab-on- Ground Floor in a Warm Climate." Energies 11, no. 11: 2988.

Journal article
Published: 11 October 2018 in Energies
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A concept of Air-Cooled Heat Pump (ACHP) coupled with a Horizontal Air-Ground Heat Exchanger (HAGHE), also called Horizontal Earth-To-Air Heat Exchanger (EAHX), has been proposed. The Air-Cooled Heat Pump is a system which transfers heat from outside source (air) to inside sink (water) and vice versa in summertime. The innovation is to provide a geothermal treatment of pre-heating/cooling of air before meeting the evaporator in winter or the condenser in summer of the heat pump. Besides, it is known that the variations of the ground temperature, respect to the external air one, are mitigated already in the first layers of the ground throughout the year, due to the high thermal inertia of the ground, letting the heat pump work with more mitigated conditions, improving the performances. The behaviour of HAGHE has been investigated by varying the length and the installation depth of the probes, the air flow rate and the ground thermal properties. All the combinations have been implemented using TRNSYS 17 software (Transient System Simulation Program) to obtain the outlet temperatures from HAGHE, resulting from the 54 configurations. The results are compared in terms of Coefficient of Performance (COP) in wintertime and Energy Efficiency Ratio (EER) in summertime between configurations with and without the coupling with HAGHE. In addition, two seasonal performance SCOP and SEER coefficients have been calculated considering, not only the inlet air temperatures into the Air-Cooled Heat Pump, but also their frequency of occurrence, the off-set external temperature (16 °C), the nominal external temperature and heating and cooling loads.

ACS Style

Cristina Baglivo; Sara Bonuso; Paolo Maria Congedo. Performance Analysis of Air Cooled Heat Pump Coupled with Horizontal Air Ground Heat Exchanger in the Mediterranean Climate. Energies 2018, 11, 2704 .

AMA Style

Cristina Baglivo, Sara Bonuso, Paolo Maria Congedo. Performance Analysis of Air Cooled Heat Pump Coupled with Horizontal Air Ground Heat Exchanger in the Mediterranean Climate. Energies. 2018; 11 (10):2704.

Chicago/Turabian Style

Cristina Baglivo; Sara Bonuso; Paolo Maria Congedo. 2018. "Performance Analysis of Air Cooled Heat Pump Coupled with Horizontal Air Ground Heat Exchanger in the Mediterranean Climate." Energies 11, no. 10: 2704.

Data article
Published: 30 August 2018 in Data in Brief
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Electric production data of a grid-connected hybrid system are presented. The system consists of a photovoltaic generator, a wind micro-generator in the presence (HPWBS) or absence (HPWS) of an electric storage system. In such a system, the power generated by RES (renewable energy sources) is sent directly to balance the load. A residential use has been analysed in warm climate. The analysis has been carried out by TRNSYS 17 (Transient System Simulation) software and the mathematical modelling and the energy balance of the system have been shown in Mazzeo et al. (2018). The annual energy performance has been evaluated, in terms of dimensionless balance of the generated energy and dimensionless balance of the energy required by the load, for 375 hybrid system configurations. These configurations were obtained by varying the photovoltaic power, the wind power and the battery storage capacity, considering different hourly average daily values of the load.

ACS Style

Cristina Baglivo; Domenico Mazzeo; Giuseppe Oliveti; Paolo M. Congedo. Technical data of a grid-connected photovoltaic/wind hybrid system with and without storage battery for residential buildings located in a warm area. Data in Brief 2018, 20, 587 -590.

AMA Style

Cristina Baglivo, Domenico Mazzeo, Giuseppe Oliveti, Paolo M. Congedo. Technical data of a grid-connected photovoltaic/wind hybrid system with and without storage battery for residential buildings located in a warm area. Data in Brief. 2018; 20 ():587-590.

Chicago/Turabian Style

Cristina Baglivo; Domenico Mazzeo; Giuseppe Oliveti; Paolo M. Congedo. 2018. "Technical data of a grid-connected photovoltaic/wind hybrid system with and without storage battery for residential buildings located in a warm area." Data in Brief 20, no. : 587-590.

Journal article
Published: 14 August 2018 in Energies
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Energy consumption in new buildings can be reduced at the design stage. This study optimizes the ventilation system design of a new residential building located in a warm climate (Southern Italy). Different system options of horizontal air-ground heat exchangers (HAGHEs), also called earth-to-air heat exchangers (EAHX), have been considered to search for the optimal configuration. The thermal behaviour of the obtained configurations has been modelled by the dynamic simulation software TRNSYS 17. The pipe numbers, the air flow rate, and the soil thermal conductivity are among the simulated building components. For each of them, different design options have been analysed to study how each parameter impacts the building thermal behaviour in winter and summer. The operative air temperature (TOP) has been evaluated inside the building prototype to investigate the indoor comfort. The paper demonstrates that HAGHEs permit to assure a suitable indoor climatization if the building envelope is optimized for a warm area. These conditions require high values of heat storage capacity to keep under control the internal temperature fluctuations, especially in summer. The paper confirms the importance of geothermal systems and design optimization to increase energy savings.

ACS Style

Cristina Baglivo; Delia D’Agostino; Paolo Maria Congedo. Design of a Ventilation System Coupled with a Horizontal Air-Ground Heat Exchanger (HAGHE) for a Residential Building in a Warm Climate. Energies 2018, 11, 2122 .

AMA Style

Cristina Baglivo, Delia D’Agostino, Paolo Maria Congedo. Design of a Ventilation System Coupled with a Horizontal Air-Ground Heat Exchanger (HAGHE) for a Residential Building in a Warm Climate. Energies. 2018; 11 (8):2122.

Chicago/Turabian Style

Cristina Baglivo; Delia D’Agostino; Paolo Maria Congedo. 2018. "Design of a Ventilation System Coupled with a Horizontal Air-Ground Heat Exchanger (HAGHE) for a Residential Building in a Warm Climate." Energies 11, no. 8: 2122.

Data article
Published: 08 August 2018 in Data in Brief
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This data article relates to a multi-criteria process applied to slab-on-ground floor for buildings in warm climate. The input data of the analysis are the building materials with their thermal properties, sustainability characteristics and supply and installation costs. The multi-criteria analysis has been performed with the software modeFRONTIER. The computational procedures in accordance with the UNI 13786 (Thermal performance of building components, Dynamic Thermal Characteristics, Calculation Methods) has been carried out in MatLab language. The methodology is presented in the articles “High performance precast external walls for cold climate by a multi-criteria methodology” (Baglivo and Congedo, 2016) [1], “Design method of high performance precast external walls for warm climate by multi-objective optimization analysis” (Baglivo and Congedo, 2015) [2], “Multi-Objective Optimization Analysis For High Efficiency External Walls Of Zero Energy Buildings (Zeb) In The Mediterranean Climate” (Baglivo et al., 2014) [3] and “Multi-criteria optimization analysis of external walls according to ITACA protocol for zero energy buildings in the Mediterranean climate” (Baglivo et al., 2014) [4], for the identification of high efficiency external walls. The set of possible optimal configurations identified by the source of Pareto have been collected into different categories of slab-on-ground floor, focusing on slab-on-ground floor with concrete, slab-on-ground floor with gravel and slab-on-ground floor with crawl space. The dataset provides a set of high efficiency solutions through the combination of commercial and eco-friendly building materials.

ACS Style

Cristina Baglivo; Paolo Maria Congedo; Vincenzo Sassi. Numerical dataset of slab-on-ground floor for buildings in warm climate from a multi-criteria analysis. Data in Brief 2018, 20, 269 -276.

AMA Style

Cristina Baglivo, Paolo Maria Congedo, Vincenzo Sassi. Numerical dataset of slab-on-ground floor for buildings in warm climate from a multi-criteria analysis. Data in Brief. 2018; 20 ():269-276.

Chicago/Turabian Style

Cristina Baglivo; Paolo Maria Congedo; Vincenzo Sassi. 2018. "Numerical dataset of slab-on-ground floor for buildings in warm climate from a multi-criteria analysis." Data in Brief 20, no. : 269-276.

Journal article
Published: 01 August 2018 in Energy
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A multi-objective optimization for the dimensioning of hybrid photovoltaic-wind-battery systems HPWBS characterized by high-energy reliability is proposed. The energy reliability-constrained (ERC) method permits choosing the most proper indicators combination to be constrained or optimized as a function of the specific application. The ERC method is applicable to grid-connected and stand-alone hybrid systems with and without storage battery, for residential as well as for other users. The indicators defined are the energy missing to meet the load, or the energy produced in excess, or the manufacturability that characterized the system in relation to the available renewable sources and load. The ERC method was employed for the multi-objective optimization of a grid-connected hybrid system with and without storage battery for the electric energy supply to an urban residential building in a Mediterranean climate. A parametric analysis, for different loads, by varying the photovoltaic and wind power and the battery storage capacity, was developed to evaluate the annual energy reliability in a dimensionless form of 375 system configurations. The results allowed obtaining empiric correlations to be used in the system design. Finally, the ERC method application allowed achieving optimal system configurations with greater reliability compared with those provided by the Pareto-front method.

ACS Style

Domenico Mazzeo; Giuseppe Oliveti; Cristina Baglivo; Paolo M. Congedo. Energy reliability-constrained method for the multi-objective optimization of a photovoltaic-wind hybrid system with battery storage. Energy 2018, 156, 688 -708.

AMA Style

Domenico Mazzeo, Giuseppe Oliveti, Cristina Baglivo, Paolo M. Congedo. Energy reliability-constrained method for the multi-objective optimization of a photovoltaic-wind hybrid system with battery storage. Energy. 2018; 156 ():688-708.

Chicago/Turabian Style

Domenico Mazzeo; Giuseppe Oliveti; Cristina Baglivo; Paolo M. Congedo. 2018. "Energy reliability-constrained method for the multi-objective optimization of a photovoltaic-wind hybrid system with battery storage." Energy 156, no. : 688-708.

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

M. Malvoni; A. Leggieri; G. Maggiotto; P.M. Congedo; M.G. De Giorgi. Corrigendum To Long Term Performance, Losses And Efficiency Analysis Of A 960 Kwp Photovoltaic System In The Mediterranean Climate [Energy Conversion And Management 145 (2017) 169–181]. Energy Conversion and Management 2018, 159, 413 .

AMA Style

M. Malvoni, A. Leggieri, G. Maggiotto, P.M. Congedo, M.G. De Giorgi. Corrigendum To Long Term Performance, Losses And Efficiency Analysis Of A 960 Kwp Photovoltaic System In The Mediterranean Climate [Energy Conversion And Management 145 (2017) 169–181]. Energy Conversion and Management. 2018; 159 ():413.

Chicago/Turabian Style

M. Malvoni; A. Leggieri; G. Maggiotto; P.M. Congedo; M.G. De Giorgi. 2018. "Corrigendum To Long Term Performance, Losses And Efficiency Analysis Of A 960 Kwp Photovoltaic System In The Mediterranean Climate [Energy Conversion And Management 145 (2017) 169–181]." Energy Conversion and Management 159, no. : 413.

Data article
Published: 21 February 2018 in Data in Brief
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Several technical combinations have been evaluated in order to design high energy performance buildings for the warm climate. The analysis has been developed in several steps, avoiding the use of HVAC systems. The methodological approach of this study is based on a sequential search technique and it is shown on the paper entitled “Envelope Design Optimization by Thermal Modeling of a Building in a Warm Climate” [1]. The Operative Air Temperature trends (TOP), for each combination, have been plotted through a dynamic simulation performed using the software TRNSYS 17 (a transient system simulation program, University of Wisconsin, Solar Energy Laboratory, USA, 2010). Starting from the simplest building configuration consisting of 9 rooms (equal-sized modules of 5 × 5 m2), the different building components are sequentially evaluated until the envelope design is optimized. The aim of this study is to perform a step-by-step simulation, simplifying as much as possible the model without making additional variables that can modify their performances. Walls, slab-on-ground floor, roof, shading and windows are among the simulated building components. The results are shown for each combination and evaluated for Brindisi, a city in southern Italy having 1083 degrees day, belonging to the national climatic zone C. The data show the trends of the TOP for each measure applied in the case study for a total of 17 combinations divided into eight steps.

ACS Style

Cristina Baglivo; Paolo Maria Congedo. Operative air temperature data for different measures applied on a building envelope in warm climate. Data in Brief 2018, 17, 1184 -1187.

AMA Style

Cristina Baglivo, Paolo Maria Congedo. Operative air temperature data for different measures applied on a building envelope in warm climate. Data in Brief. 2018; 17 ():1184-1187.

Chicago/Turabian Style

Cristina Baglivo; Paolo Maria Congedo. 2018. "Operative air temperature data for different measures applied on a building envelope in warm climate." Data in Brief 17, no. : 1184-1187.