Michele Libralato

Michele Libralato
University of Udine | UNIUD · Polytechnic Department of Engineering and Architecture

Doctor of Engineering
Research Fellow at University of Udine

About

20
Publications
2,422
Reads
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47
Citations
Citations since 2017
20 Research Items
47 Citations
201720182019202020212022202305101520
201720182019202020212022202305101520
201720182019202020212022202305101520
201720182019202020212022202305101520
Additional affiliations
November 2019 - present
University of Udine
Position
  • Research Scolarship
Description
  • Weather file generation for moisture related building simulations
May 2019 - July 2020
Technical University of Denmark
Position
  • PhD Student
November 2018 - March 2019
Free University of Bozen-Bolzano
Position
  • PhD Student
Education
October 2016 - October 2019
University of Udine
Field of study
  • Environmental and Energy Engineering Science
September 2013 - October 2016
University of Udine
Field of study
  • Civil Engineering

Publications

Publications (20)
Conference Paper
The cooling load of a commercial refrigeration system is affected by the operating conditions of the refrigerated display cabinets and cold rooms, mainly through their mutual interactions with the indoor environment in terms of temperature and humidity. In this paper, the effects of cooling load profiles in the prediction of the annual energy use a...
Conference Paper
The electrical energy demand of an HVAC plant can be better managed by using latent thermal energy storage when time-of-use tariffs or peak tariffs are in force, in a view of Demand Side Management of the electrical grid. Nonetheless, air conditioning systems show a marked use of electrical power during the day, and the peak in the cooling load mos...
Article
Full-text available
Wood decay risk assessment of building envelopes is commonly performed by engineers, architects and practitioners using results of Heat and Moisture Transfer (HMT) simulations and damage models. The commonly accepted HMT models use bijective sorption functions, accepting that materials reach hygrothermal equilibrium with the humidity contained in t...
Conference Paper
Full-text available
The risk analysis of moisture-related damages can potentially be carried out with the use of heat and moisture transfer simulations. These models require weather files as boundary conditions but, for most locations, the only weather files available are Typical Reference Years, for instance the TRYEN defined in accordance with EN ISO 15927-4:2005. T...
Article
Hygroscopic materials could be used to passively regulate indoor moisture fluctuations, and thus reduce building energy consumption. It is essential to accurately calculate the moisture buffering effect in building energy simulations. However, in many building simulation tools, moisture buffering has been neglected. In those building tools that inc...
Conference Paper
The electrical energy demand of an HVAC plant can be better managed by using latent thermal energy storage when time-of-use tariffs or peak tariffs are in force, in a view of Demand Side Management of the electrical grid. Nonetheless, air conditioning systems show a marked use of electrical power during the day, and the peak in the cooling load mos...
Conference Paper
Transcritical CO2 refrigeration systems for supermarkets are more and more integrated to DHW production, space cooling & heating. In CO2 integrated solutions, the thermal loads of supermarket buildings are fully covered by the refrigeration system, but advantages in terms of total investment and running costs need to be carefully estimated. They ar...
Article
Full-text available
Transient building energy simulations are powerful design tools that are used for the estimation of HVAC demands and internal hygrothermal conditions of buildings. These calculations are commonly performed using a (often dated) typical meteorological year, generated from past weather measurements excluding extreme weather conditions. In this paper...
Article
Full-text available
Heat and Moisture Transfer (HMT) simulations are used to evaluate moisture related damage risks in building envelopes. HMT simulations are commonly performed accepting the hypothesis of not considering the moisture hysteresis of materials. The results of HMT simulation of a timber wall with hysteresis are presented, and compared to the results of t...
Conference Paper
Full-text available
An ice thermal energy storage is adopted in the HVAC plant of a supermarket, to shave peaks in electricity use. Ice is formed at night-time by employing the commercial refrigeration system, which is considerably partloaded during the shop closing time. During daytime, the thermal storage is discharged and operated in parallel to a water chiller, to...
Book
Full-text available
Il cambiamento climatico, probabilmente il più importante dei problemi che l’umanità si trova ad affrontare, è causato dalle concentrazioni atmosferiche eccessive di “gas serra” (come anidride carbonica, metano e protossido di azoto per citare i più importanti). Questi gas hanno la poco gradita proprietà di lasciar passare le radiazioni solari in e...
Conference Paper
Full-text available
The push towards a lower environmental impact of the building sector leads to a widespread adoption of materials like wood and natural insulation. Those materials are characterised by a solid matrix with voids that can be filled with moist air and water and in which complex heat and mass transfer occur, influencing the global thermal properties. In...
Article
Full-text available
Heat and moisture (HM) transfer simulations of building envelopes and whole building energy simulations require adequate weather files. The common approach is to use weather data of reference years constructed from meteorological records. The weather record affects the capability of representing the real weather of the resulting reference years. In...
Conference Paper
Full-text available
Heat, air and moisture (HAM) transfer simulations used in moisture accumulation risk assessment of building envelopes require adequate weather files. The common approach is to use weather data of reference years constructed from meteorological records. The length of the records affects the capability of representing the real weather of the resultin...
Article
The purpose of this article is to present and validate a computationally efficient numerical approach for the calculation of the ground-coupled heat transfer in buildings with periodic boundary conditions. When the boundary conditions of the heat transfer problem are described by periodic functions, it is possible to consider the transient state pr...
Article
Full-text available
Several industrial products and applications need to remove a large amount of thermal energy that arises from very small surfaces; typical solutions to this problem are heat sinks, dissipating heat devices in electrical and electronic appliances. In most cases they are cooled by means of finned surfaces and forced air. In some cases, especially in...
Conference Paper
Full-text available
Interstitial condensation and water accumulation risk in building envelopes could be assessed with methods and models based on moisture migration through porous media coupled to heat transfer. One of the difficulties in evaluating the boundary conditions for the heat and mass transfer model is the choice of an appropriate weather file. The most adv...
Conference Paper
The Glaser method is an assessment procedure for the risk of moisture accumulation in building mono-dimensional structures, that could be used to evaluate mould risk and interstitial condensation risk.It is based on a simplified model that does not represent the real phenomenon and its limitations are well-known qualitatively.This work provides a c...

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Projects

Projects (3)
Project
Looking for low TEWI solutions for commercial refrigeration
Project
Alternative and accurate methods for the calculation of the heat losses through the ground considering for the implementation in the ISO 13370:2007 procedure. The numerical simulations of the phenomena with the quasi-stationary heat transfer model are faster than the transient simulations and could be applied to slabs of complex shapes.
Project
Not all the weather files are the same and not all the building simulations are the same. The TRY (also known as TMY, the most common reference year weather file) is obtained with a design procedure that selects the most representative months considering the weather variables that are important for building energy simulations. When a simulation is focused on other variables (for example moisture related variables like rainfall intensity), these weather files are not representative anymore. In this project, new reference year design methods are presented and evaluated for moisture related simulations, distinguishing between the applications, the climate zones and the building materials considered.