Interuniversity Research Center on Pollution and Environment Mauro Felli

Perugia, Italy

Interuniversity Research Center on Pollution and Environment Mauro Felli

Perugia, Italy
SEARCH FILTERS
Time filter
Source Type

Pyrgou A.,The Cyprus Institute | Castaldo V.L.,Interuniversity Research Center on Pollution and Environment Mauro Felli | Castaldo V.L.,University of Perugia | Pisello A.L.,University of Perugia | And 5 more authors.
Sustainable Cities and Society | Year: 2017

Local climate phenomena impose a serious threat to the built environment. In particular, urban heat island and heatwaves can significantly affect buildings’ thermal-energy performance. The purpose of this study is to investigate summer hot periods and their impact on building thermal-energy behavior in an urban area in Italy. To this aim, the statistical analysis of the microclimate variation during monitored hot periods is performed by the analysis of local weather parameters collected from a dedicated meteorological station. Moreover, the numerical analysis of representative Italian residential buildings is carried out to determine the role of such phenomena on indoor thermal comfort and cooling energy requirements, by considering the consequences arising from heatwaves due to the indoor overheating stress. The analysis showed a strong negative correlation between temperature and relative humidity during extreme hot periods (∼−0.92). Positive correlation was noted between temperature and solar irradiance (∼0.62) and temperature and wind velocity (∼0.33). The southern winds registered in normal hot periods reduced the heat stress by cooling-down the south-facing urban surfaces. The numerical analysis demonstrated higher indoor temperature for insulated buildings, requiring more than three times the cooling requirement of traditional non-insulated buildings in extreme hot periods and exacerbating the occupants’ vulnerability. © 2016 Elsevier Ltd


Pisello A.L.,University of Perugia | Castaldo V.L.,Interuniversity Research Center on Pollution and Environment Mauro Felli | Piselli C.,Interuniversity Research Center on Pollution and Environment Mauro Felli | Fabiani C.,Interuniversity Research Center on Pollution and Environment Mauro Felli | Cotana F.,University of Perugia
Energy and Buildings | Year: 2016

While UHI mitigation potential of cool roofs has been deeply investigated compared to cool façades, still not sufficient research effort has been dedicated to quantify the benefits of combined cool building products.The present work evaluates the thermal performance of an innovative cool roofing membrane and a cool façade painting applied on a prototype building. Moreover, an analytical procedure able to predict the cool coating thermal performance is elaborated. Such methodology can be used to determine the passive cooling potential of each product as a separate envelope component and as a combination. To this twofold aim, a preliminary in-field monitoring is developed. Therefore, a sensitivity analysis is performed to evaluate the separate and combined passive cooling contributions of the roof and the differently oriented façades. Finally, the analytical procedure is developed to define external surface temperature profiles able to predict the building coating thermal performance by minimizing the number of temperature measurements.Results show the major contribution of cool roof membrane in reducing indoor operative temperature. Nevertheless, a non-negligible cooling effect in terms of outdoor surface temperature is imputable to the South cool façade. Moreover, the analytical model shows an acceptable accuracy in representing the behavior of the building coating. © 2017 Elsevier B.V.


Castaldo V.L.,Interuniversity Research Center on Pollution and Environment Mauro Felli | Pisello A.L.,University of Perugia | Boarin P.,University of Auckland | Petrozzi A.,Interuniversity Research Center on Pollution and Environment Mauro Felli | Cotana F.,University of Perugia
Buildings | Year: 2017

The sustainability and efficiency of buildings represents a crucial issue since the building sector is currently responsible for more than 40% of energy consumption and emissions. This concern is extended to historical buildings, as they are typically low-performance constructions usually equipped with ineffective systems. For these reasons, the upgrade of historical constructions from an energy and environmental perspective is urgent, especially in those countries where such buildings represent more than half of the building stock. This work concerns the refurbishment of a historical Italian building by integrating passive and active solutions to optimize the indoor thermal comfort and the energy performance. To this aim, the innovative GBC Historic Building® rating system, a new tool evaluating the sustainability level of conservation-related activities on pre-industrial buildings, is applied. A combined trigeneration heat and power plant with an absorption chiller to produce cooling and powered by vegetable oil is installed in the building. A dynamic simulation of the building is also carried out to predict the post-retrofit energy performance upgrading. The final aim is to propose an integrated approach for the preservation and energy upgrading of existing constructions by improving their energy performance and environmental quality while protecting their heritage value. © 2017 by the authors.


Pisello A.L.,Interuniversity Research Center on Pollution and Environment Mauro Felli | Pisello A.L.,University of Perugia | Fabiani C.,University of Perugia | D'Alessandro A.,University of Perugia | And 4 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2017

Concrete is widely applied in the construction sector for its reliable mechanical performance, its easiness of use and low costs. It also appears promising for enhancing the thermal-energy behavior of buildings thanks to its capability to be doped with multifunctional fillers. In fact, key studies acknowledged the benefits of thermally insulated concretes for applications in ceilings and walls. At the same time, thermal capacity also represents a key property to be optimized, especially for lightweight constructions. In this view, Thermal-Energy Storage (TES) systems have been recently integrated into building envelopes for increasing thermal inertia. More in detail, numerical experimental investigations showed how Phase Change materials (PCMs), as an acknowledged passive TES strategy, can be effectively included in building envelope, with promising results in terms of thermal buffer potentiality. In particular, this work builds upon previous papers aimed at developing the new PCM-filled concretes for structural applications and optimized thermalenergy efficiency, and it is focused on the development of a new experimental method for testing such composite materials in thermal-energy dynamic conditions simulated in laboratory by exposing samples to environmentally controlled microclimate while measuring thermal conductivity and diffusivity by means of transient plane source techniques. The key findings show how the new composites are able to increasingly delay the thermal wave with increasing the PCM concentration and how the thermal conductivity varies during the course of the phase change, in both melting and solidification processes. The new analysis produces useful findings in proposing an effective method for testing composite materials with adaptive thermal performance, much needed by the scientific community willing to study building envelopes dynamics. © 2017 SPIE.


Pisello A.L.,University of Perugia | Castaldo V.L.,Interuniversity Research Center on Pollution and Environment Mauro Felli | Piselli C.,Interuniversity Research Center on Pollution and Environment Mauro Felli | Pignatta G.,Interuniversity Research Center on Pollution and Environment Mauro Felli | Cotana F.,University of Perugia
Energy Procedia | Year: 2015

Recently, huge efforts were made to develop new passive solutions for optimizing building summer thermal-energy behavior. While cool roofs are well investigated, a lack of knowledge is detected about the benefits deriving from the combination of cool roofs and cool façades. This work aims at determining the thermal performance of innovative cool roofing membrane and cool façade painting when applied on a prototype building, through continuous monitoring. Additionally, sensitivity analysis is performed to investigate the thermal benefits of the coupled solutions. Results showed that the combined solutions generate significant passive cooling in terms of indoor operative temperature reduction. © 2015 Published by Elsevier Ltd.


Cobellis G.,University of Perugia | Petrozzi A.,Interuniversity Research Center on Pollution and Environment Mauro Felli | Forte C.,University of Perugia | Acuti G.,University of Perugia | And 6 more authors.
Sustainability (Switzerland) | Year: 2015

The effects of increasing concentrations of oregano (Origanum vulgare L.) and rosemary (Rosmarinus officinalis L.) essentials oil (EO) on ruminal gas emissions were tested in vitro using 50 mL serum bottles. Each bottle contained a 200 mg substrate (alfalfa hay and corn meal 1:1) and a 20 mL solution composed of a buffered medium and rumen fluid (1:2). The percentage of ruminal fermentation products was quantified by an infrared analyzer. The reduction of total gas production was 6% and 9% respectively when using the 1.5 and 2.0 g/L oregano EO measurements. The reduction of methane production was 55%, 72% and 71% respectively with regard to the 1.0, 1.5 and 2.0 g/L oregano EO doses, while rosemary EO (2.0 g/L) reduced the methane production by 9%. The production of ammonia was significantly reduced (59%-78%) by all treatments with the exception of rosemary EO at the lowest dose. Dry matter and neutral detergent fiber degradability was reduced by most of the treatments (respectively 4%-9% and 8%-24%). The total volatile fatty acids (VFA) concentration was markedly decreased by oregano EO and was not affected by rosemary EO. Both EOs mitigated rumen fermentations, but oregano EO gave rise to the highest reduction in methane and ammonia production. However, further research is needed to evaluate the use of these essential oils as dietary supplements by taking into account the negative effects on feed degradability. © 2015 by the authors.

Loading Interuniversity Research Center on Pollution and Environment Mauro Felli collaborators
Loading Interuniversity Research Center on Pollution and Environment Mauro Felli collaborators