Michele De Carli

Michele De Carli
University of Padova | UNIPD · Department of Industrial Engineering

About

149
Publications
38,537
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3,344
Citations
Citations since 2017
54 Research Items
2406 Citations
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20172018201920202021202220230100200300400

Publications

Publications (149)
Article
According to the recent policies regarding energy use in buildings and the need of retrofit strategies, the aim of this work is to support policies concerning the installation of ground source heat exchangers in urban and historical areas, raising the awareness on the potential energy saving achievable with optimal sizing and limited impact on the...
Article
In Northern Italy, woody biomass is widely used as an energy carrier for domestic heating systems; this leads to lower CO2 emissions, but some concerns are due to particulate matter emissions. The present paper compares three methodological approaches to estimate biomass consumption for residential heating in the Italian Po Valley using data aggreg...
Chapter
The energy demands of a museum are related mainly to the need for space heating and cooling, to provide adequate comfort to visitors. However, it is mandatory to ensure the correct microclimate for the conservation of perishable artifacts. The temperature and humidity conditions in the exhibition rooms must be compatible with each item. In this reg...
Article
Towards the development of highly integrated and energy efficient heating and cooling systems, with an energy community perspective, the present paper proposes a novel technical solution for the provision of air-conditioning, domestic hot water and electricity to a small residential district in heating-dominant regions. Three reference climates hav...
Conference Paper
Full-text available
The energy performance gap, i.e. the difference between measured and predicted behaviour of buildings, is one of the main challenges for the building simulation community and it is highly relevant due to the increasing number of building renovations fostered by recent European Directives. In fact, occupants have a high influence on the building ene...
Article
Full-text available
In the European Union, 40% of the overall final energy consumption is attributable to the buildings sector. A reason for such data may be found considering that the great majority of the building stock is more than 40 years old. According to the European Commission, an interesting potential lies in the refurbishment of the building sector, and heat...
Article
Full-text available
In the residential sector, biomass appliances are widely used for space heating and often combined with other systems. This work aims at comparing the final and primary energy consumption of different configurations, including a conventional and a ducted pellet stove and a wood log stove using air as heat transfer fluid. A dynamic analysis of the i...
Article
Full-text available
Renewable Energy Communities have been recently introduced in European legislation to promote distributed generation from renewable energy sources. In fact, they allow to produce and consume energy from shared local power plants. Low temperature district heating and cooling networks with distributed heat pumps have demonstrated their capability to...
Article
Geothermal energy has the potential to contribute significantly to the CO2 reduction targets as a renewable source for building heating and cooling but is yet under exploited, mostly due to its high initial investment cost. A lot of research is being carried out to optimise Ground Source Heat Pump (GSHP) systems’ design, but a good control strategy...
Conference Paper
Full-text available
In this work, the climatic chamber CORE-CARE is presented. The laboratory was built at the Industrial Engineering Department of the University of Padova, in order to further investigate issues related to indoor environmental quality, the comfort perceived by people in confined spaces and thermal performance of radiant systems. CORE-CARE is equipped...
Conference Paper
Full-text available
Nowadays, the search for new solutions to the pandemic situation caused by the spread of SARS-CoV-2 is one of the most important issues worldwide. The difficulties encountered in finding an effective cure for the infection and the ongoing vaccination campaign place a priority on minimising the transmission of this disease. This paper deals exclusiv...
Article
TRNSYS Software is a flexible tool for dynamic simulation of plants, interconnecting the different components of the system represented as black boxes and called “Types”. This paper presents a novel Type for the simulation of a reversible water-to-water heat pump that is freely released. Differently from the previous models available in this enviro...
Article
Full-text available
Following the 2016 central Italy earthquakes, the high seismic vulnerability of existing buildings is once again at the center of the debate. Indeed, the majority of the Italian building stock (around 60%) was built before adopting the first seismic provisions (1974) and in a territory entirely characterized by medium to high levels of seismic haza...
Article
With growing concerns on global warming, exergy-based design methods for energy hubs (EHs) in the urban context have been recently investigated to promote more rational and efficient use of energy sources. This study aims to compare exergy-based multi-objective optimization for energy hubs with two primary energy-based methods. The comparison has b...
Article
Full-text available
Energy communities (ECs) are becoming increasingly common entities in power distribution networks. To promote local consumption of renewable energy sources, governments are supporting members of ECs with strong incentives on shared electricity. This policy encourages investments in the residential sector for building retrofit interventions and tech...
Article
Full-text available
Ground coupled heat pumps are a notoriously efficient system for heating and cooling buildings. Sometimes the characteristics of the building and the user’s needs are such that the amount of heat extracted from the ground during the winter season can be considerably different from the amount injected in summer. This situation can cause a progressiv...
Article
Full-text available
The energy-saving potential of heat pump technology is widely recognized in the building sector. In retrofit applications, especially in old and historic buildings, it may be difficult to replace the existing distribution and high-temperature emission systems. Often, historical buildings, especially the listed ones, cannot be thermally insulated; t...
Article
Underground food storage represents an interesting solution to the increasing demand for new food storage space, combining this demand with sustainable land exploitation. It also reduces the energy demand for food conservation, therefore limiting storage costs and greenhouse gas emissions. Moreover, atmospheric conditions can be easily controlled i...
Article
Ventilation systems are necessary to ensure a good indoor air quality, especially in buildings characterized by high energy performance. An all-air system could be more flexible than radiant systems that need to be combined with other systems to provide fresh air and control latent loads. In this work, a multi-zone all-air system has been compared...
Article
The use of multi-source energy systems is a promising technical solution for the reduction of greenhouse gases emissions and, at the meantime, for enhancing the exploitation of renewable energy sources. The present paper analyses a Solar Assisted Ground Source Heat Pump system and tries to fill the gap in the literature, where a direct comparison b...
Article
Full-text available
A R T I C L E I N F O Keywords: Borehole heat exchanger design Thermal conductivity Volumetric heat capacity Database Rock Unconsolidated sediment A B S T R A C T When a new ground source heat exchanger field is planned, underground thermal properties input data are necessary for the correct sizing of the geo-exchange system. To support the design,...
Article
Full-text available
In civil application the most diffuse type of HVAC is the mixed one made by fancoils and primary air system. Usually the primary air has not only the aim of replace the exhaust air in the rooms. During the cooling season air plants have the task of dehumidification of the indoor air which is humidified by the indoor humidity sources, like the human...
Conference Paper
Full-text available
For promoting the diffusion of GSHP and making the technology more accessible to the general public, in the H2020 research project "CHeap and Efficient APplication of reliable Ground Source Heat exchangers and PumpS" (acronym Cheap-GSHPs) a tool for sizing these systems has been developed, as well as a Decision Support System (DSS) able to assist t...
Article
Full-text available
In the European Union (EU), buildings are responsible for about 40% of the total final energy consumption, and 36% of the European global CO2 emissions. The European Commission released directives to push for the enhancement of the buildings energy performance and identified, beside the retrofit of the current building stock, Heating, Ventilation,...
Article
Full-text available
The final aim of the EU funded Cheap-GSHPs project is to reduce the total installation cost of closed-loop shallow geothermal systems. As part of the project a Decision Support System (DSS) has been developed and released on the web, in order to support the design of new closed-loop geo-exchange systems. The Cheap-GSHP project addresses all the asp...
Article
Full-text available
The design of ground source heat pumps is a fundamental step to ensure the high energy efficiency of heat pump systems throughout their operating years. To enhance the diffusion of ground source heat pump systems, two different tools are developed in the H2020 research project named, “Cheap GSHPs”: A design tool and a decision support system. In bo...
Poster
Full-text available
Short presentation of the Decision Support System (DSS) and the design tool developed within the Europan funded project Cheap-GSHPs for helping stakeholders and designers in the choice of GSHPs
Conference Paper
Full-text available
The present work shows a method to produce techno-economic maps that represent the feasibility of double-U closed-loop shallow geothermal systems for different case studies in Europe and the potential savings that could be introduced by newly developed Cheap-GSHPs (CHeap and Efficient APplication of reliable Ground Source Heat exchangers and Pumps)...
Conference Paper
The overall goal of the EU funded project CHEAP-GSHPs is the development of more efficient and safe shallow geothermal systems for building conditioning, and the reduction of their installation costs. Among other outputs, in order to reduce the engineering costs of geothermal heat exchangers sizing, a Decision Support System (DSS) has been develope...
Article
Full-text available
The present paper shows the background analysis to develop the optimization strategy of a neighborhood heating network sited in Padua, including it in a wider project of district renovation. The case study accounts several different end users: scholastic and offices buildings, a social housing residence and residential buildings. The analysis start...
Article
Full-text available
The following article describes an extract of the results of experimental investigations on the topic of thermal comfort as a function of radiation asymmetry. The investigations were carried out in the climate chamber [1, 2] of the TU Dresden with the help of subjects. The radiation asymmetry was imprinted by subdividing the climate chamber into tw...
Article
Full-text available
For promoting the diffusion of GSHP and making the technology more accessible to the general public, in the H2020 research project “CHeap and Efficient APplication of reliable Ground Source Heat exchangers and PumpS” (acronym Cheap-GSHPs) a tool for sizing these systems has been developed, as well as a Decision Support System (DSS) able to assist t...
Article
Full-text available
Since the beginning of this century, according to EPBD Directive, Italian legislation has been focusing on existing buildings’ retrofit, as they represent a large part of the national building stock. In this context, the most difficult challenge is preserving heritage and obtaining energy saving at the same time, which is the aim of the European St...
Article
Full-text available
Ground Source Heat Pumps (GSHP) are gaining interest for many applications and a very difficult task is to look at their affordability in urban environments with limited spaces. For this reason, the EU project GEO4CIVHIC has been funded. In order to set up different cases with different levels of retrofit and try to generalize results, the project...
Article
Full-text available
In recent years many types of radiant systems have been installed in buildings. Meanwhile, practitioners debate on which thermal inertia of radiant systems fit better and which control strategies should be better in buildings, depending on the insulation level and thermal inertia of the structures. In particular, in new and retrofitted buildings, w...
Article
A promising district heating concept consists of distributing the heat at temperatures below 45°C and using booster heat pumps at the customers’ substations to provide the appropriate temperature needed for space heating and domestic hot water production. As such, thermal networks would be able to abate heat losses and substantially increase the nu...
Article
Ground-coupled heat pumps are increasingly being utilized to heat and cool buildings. Although it is difficult to size and to predict their behaviour and performance, their design can be optimized via simulations. EnergyPlus is a popular energy simulation program for modeling building heating and other energy flows and, since it is organized to con...
Article
Full-text available
Weather plays an important role for energy uses in buildings. For this reason, it is required to define the proper boundary conditions in terms of the different parameters affecting energy and comfort in buildings. They are also the basis for determining the ground temperature in different locations, as well as for determining the potential for usi...
Article
The development of heat pump technology in the residential sector can lead, and has led to a reduction in greenhouse emissions and enhanced exploitation of renewable energy sources, including solar energy which represents the renewable source for excellence. The current study examines a multi-source energy system equipped with photovoltaic thermal...
Article
Reducing the energy demand of buildings has become one of the key points of the European Union. The issue related to the air conditioning of old and historical buildings is nowadays one of the most important field of operation for the primary energy saving and, at the same time, for the reduction of the CO2 emission. The recent development of heat...
Article
Full-text available
The Molinella test site is the open-air laboratory of the EU project entitled “Cheap-GSHPs: Cheap and Efficient Application of Reliable Ground Source Heat Exchangers and Pumps”. Here, innovative helical heat baskets and steel coaxial probes are installed next to the traditional double-U. The tests involve the probes design as well as materials and...
Article
Full-text available
The design phase of ground source heat pump systems is an extremely important one as many of the decisions made at that time can affect the system’s energy performance as well as installation and operating costs. The current study examined the interpretation of thermal response testing measurements used to evaluate the equivalent ground thermal con...
Conference Paper
Full-text available
Lumped-capacitance models for the simulation of the dynamic thermal behaviour of buildings have received a growing attention recently due to their low computational cost and ease of implementation into city district simulation models. This work looks at two simplified dynamic models to evaluate the energy performance of buildings in both heating an...
Article
The popularity of ground source heat pump systems for both heating and cooling has grown significantly over recent years. Ground heat exchangers are usually buried in the ground either vertically in boreholes or horizontally in trenches. Antifreeze fluids in closed-loop systems are commonly used in these plants to protect them from freezing phenom...
Article
A simulation model of ground source heat pump systems has been used to investigate to what extent a variable flow of the heat-carrier fluid of the ground loop affects the energy efficiency of the entire system. The model contemporaneously considers the borehole heat exchangers, the heat pump, the building load, and the control strategies for the ci...
Article
Energy foundation piles can be an efficient cost-effective solution for ground source heat pump applications. As they are very different from standard ground heat exchangers, numerical or analytical models usually used to investigate their thermal performance must be carefully analysed before they can be applied. The total length of ground heat ex...
Article
Full-text available
Nowadays the heat pump technology is an efficient solution in the residential sector since it allows to reduce CO2 emissions and to exploit renewable energy sources. At the same time, the solar energy is the renewable source for excellence. In this study, different combinations of a photovoltaic thermal hybrid solar collector (PVT) and a multi-sour...
Article
Full-text available
The heat pump systems are considered today an environmentally friendly technology and, together with other energy production systems from renewable sources, are fundamental for reducing energy consumption and the resulting greenhouse gas emissions due to air conditioning of buildings. The ground source heat pumps use the ground as a heat source abl...
Poster
Full-text available
Nowadays the energy price fluctuations and the economic crisis are jeopardizing the development and diffusion of renewable technologies and sources. With the aim of both reduce the overall costs of shallow geothermal systems and improve their installation safety, an European project has took place recently, under the Horizon 2020 EU Framework Progr...
Conference Paper
Full-text available
The success and widespread diffusion of new technologies are always strictly related to their affordability. Nowadays, the energy price fluctuations and the economic crisis jeopardize the development and diffusion of renewable technologies and sources. With the aim of both reduce the overall costs of shallow geothermal systems and improve their ins...
Conference Paper
Full-text available
The principal aim of this work was to improve the characterization of Mt. Alid geothermal system (eastern Eritrea), considered the most favourable geothermal resource of the country and the best energy sources in terms of economic and environmental point of view. To conduct a detailed remote sensing analysis, a high resolution digital elevation mod...
Conference Paper
Full-text available
In recent years, the environmental impacts caused by the energy production from fossil fuels represent a worldwide issues. Meanwhile the increase in energy requirements, along with a growing awareness in curbing gas emissions and pollutants, have promoted a growth of new technologies to save and produce energy from renewable sources. Thermal use of...
Conference Paper
Full-text available
Le prestazioni di isolamento acustico conseguibili in opera dipendono principalmente dall'entità delle trasmissioni laterali per connessione alle strutture limitrofe e dalla rilevanza delle eventuali trasmissioni dirette imputabili a ponti acustici dovuti a problemi di posa. Nel caso di elementi edilizi composti da strutture modulari, il problema d...
Conference Paper
Full-text available
District heating networks play a key role in the transition towards sustainable cities, due to their ability to efficiently provide space heating and domestic hot water to buildings located in urban areas. Although an increasing number of buildings is being refurbished, a significant portion of the building stock during next decades will still be m...
Conference Paper
Full-text available
The study presents a numerical dynamic model carried out using TRNSYS and discusses the thermal performance of façade building integrated with PV modules on its west and east vertical sides. The needed thermal peak power and energy of the building were estimated added to the produced electrical energy of the installed PV system. The comparative stu...
Conference Paper
Full-text available
Space heating and cooling energy need of a building can be evaluated through three kinds of methods: the quasi-steady state method, the simple hourly method and detailed dynamic simulation methods. In this work the calculation procedure of the simple hourly method has been implemented in MATLAB and then tested on a very simple building. The results...
Article
Full-text available
The objective is to verify the operation of an installed system in an OfficeRetail building located in Sweden. The focus is on comparing the energy saving achievable with different ventilation systems with focus on keeping or improving the indoor comfort condition. The systems taken into account are: a constant air volume, a variable air volume and...
Article
Exploiting renewable energy sources for air-conditioning has been extensively investigated over recent years, and many countries have been working to promote the use of renewable energy to decrease energy consumption and CO2 emissions. Electrical heat pumps currently represent the most promising technology to reduce fossil fuel usage. While ground...