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Dive into the research topics where Luigi Marletta is active.

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Featured researches published by Luigi Marletta.


Advances in Building Energy Research | 2013

Cool roofs for passive cooling: performance in different climates and for different insulation levels in Italy

Vincenzo Costanzo; Gianpiero Evola; Luigi Marletta

Roofs are severely hit by solar radiation in summer; hence the use of cool materials on the finishing layer provides a significant reduction in the heat flow entering the building, with sensible attenuation in the building cooling load. In this paper, a case study is presented, based on the dynamic simulation of an existing office building in Catania (southern Italy). Here, a part of the roof has been recently treated with a commercial cool paint, with the aim of improving thermal comfort in summer. Hence, the simulations represent a preliminary study that will allow assessing the expected effectiveness of the intervention. More in detail, the results of the simulations will be discussed in terms of both thermal comfort and energy savings, through the evaluation of parameters such as the roof surface temperature, the operative temperature and the cooling load for both conditions, i.e. with and without the cool paint. The paper also discusses the potential increase in the energy needs for winter heating, and looks at the overall annual balance in terms of primary energy; this is made by considering different climatic conditions and envelope characteristics. These aspects are usually not well highlighted in the current scientific literature.


Advances in Mechanical Engineering | 2013

Study on the Application of Cool Paintings for the Passive Cooling of Existing Buildings in Mediterranean Climates

Vincenzo Costanzo; Gianpiero Evola; Antonio Gagliano; Luigi Marletta; Francesco Nocera

Building roofs play a very important role in the energy balance of buildings, especially in summer, when they are hit by a rather high solar irradiance. Depending on the type of finishing layer, roofs can absorb a great amount of heat and reach quite high temperatures on their outermost surface, which determines significant room overheating. However, the use of highly reflectivecool materials can help to maintain low outer surface temperatures; this practice may improve indoor thermal comfort and reduce the cooling energy need during the hot season. This technology is currently well known and widely used in the USA, whilereceiving increasing attention in Europe. In order to investigate the effectiveness of cool roofs as a passive strategy for passive cooling in moderately hot climates, this paper presents the numerical results of a case study based on the dynamic thermal analysis of an existing office building in Catania (southern Italy, Mediterranean area). The results show how the application of a cool paint on the roof can enhance the thermal comfort of the occupants by reducing the operative temperatures of the rooms and to reduce the overall energy needs of the building for space heating and cooling.


Entropy | 2010

Air Conditioning Systems from a 2nd Law Perspective

Luigi Marletta

In this paper exergy analysis is used to assess the performance of the three most common air conditioning plant schemes: all-air, dual-duct and fan-coil systems. The results are presented in terms of flow diagrams to provide a clear picture of the exergy flow across the systems. The most relevant outcomes are that the air cooling and dehumidification is the process most responsible for the exergy loss and that the exergy efficiency of the overall systems is rather low; thus the quest for more appropriate technologies. Solar-assisted air-conditioning is also discussed, outlining the possibilities and the constraints.


Building and Environment | 2013

A methodology for investigating the effectiveness of PCM wallboards for summer thermal comfort in buildings

Gianpiero Evola; Luigi Marletta; F. Sicurella


Energy and Buildings | 2016

Energy savings in buildings or UHI mitigation? Comparison between green roofs and cool roofs

Vincenzo Costanzo; Gianpiero Evola; Luigi Marletta


Energy and Buildings | 2014

Simulation of a ventilated cavity to enhance the effectiveness of PCM wallboards for summer thermal comfort in buildings

Gianpiero Evola; Luigi Marletta; F. Sicurella


Energy and Buildings | 2011

Energy and cost evaluation of thermal bridge correction in Mediterranean climate

G. Evola; G. Margani; Luigi Marletta


Energy and Buildings | 2014

Proper evaluation of the external convective heat transfer for the thermal analysis of cool roofs

Vincenzo Costanzo; Gianpiero Evola; Luigi Marletta; Antonio Gagliano


Energy and Buildings | 2013

A dynamic parameter to describe the thermal response of buildings to radiant heat gains

Gianpiero Evola; Luigi Marletta


Energy and Buildings | 2014

Cost-effective design solutions for low-rise residential Net ZEBs in Mediterranean climate

Gianpiero Evola; G. Margani; Luigi Marletta

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F. Sicurella

Centre national de la recherche scientifique

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