Ricerc@Sapienza

Due to the limitations of the stationary energy needs calculation, energy dynamic simulation tools become strictly essential. In literature, many researches compared different energy simulation tools without validating those models through real data. In this framework, this study aims to compare two energy dynamic simulation tools: TRNSYS 16 and Grasshopper/Archsim, through a real case study, the historical building of Palazzo Baleani, validated by comparing the simulated results with real consumptions.

The European Union, through the Energy Performance of Building Directive (EPBD), has recently set the minimum requirements in order to reduce the energy consumption of existing buildings and achieving nearly zero energy buildings (NZEBs). In order to comply with these requirements different aspects of the building sector have to be dealt with.

Great part of the Italian buildings have historical value and it make difficult to reach high energy performances, due to the limitations introduced by the legislation to preserve their cultural impact. Therefore, in the present paper is analyzed a possible retrofit scenario for the envelope of an historical edifice and the creation of a microgrid in order to optimize the electrical energy produced by PV panels with the goal of reaching the Nearly Zero Energy Building target, despite of the boundaries limiting the possible interventions.

L’interesse dell’Unione Europea per la realizzazione di edifici energeticamente sostenibili è stato concretizzato attraverso la pubblicazione di molti documenti internazionali, tra cui la Direttiva europea 2010/31/UE, nota come EPBD Recast, che stabilisce che

Optimize consumptions in the field of civil construction led to define energy classes for residential buildings. To calculate the energy demand in buildings the EPgl was determined (annual consumptions per m2 of primary energy). This paper examines those technical solutions useful to optimize the energy demands for the building heating during space-heating season and domestic hot water production (thanks to energy analysis software as MC11300 and TRNSYS), and at the same time keep into consideration the financial issues that those interventions implied.