Search results for " retrofit"
showing 10 items of 81 documents
The Financial Costs in Energy Efficient District. Alternative Scenarios from the Demo Sites of the CITyFiED Program
2021
The European Union’s environmental policies actively promote the transition to a low-carbon society and to sustainable energy systems that improve people’s quality of life and do not negatively impact the natural environment. To achieve these goals, the European Union funded several programs to pilot energy efficiency measures for buildings and districts and, lately, launched the European Green Deal. The results of these experimentations have shown that often the economic feasibility of retrofitting interventions is not achieved without public grants. This contribution aims to analyze the influence of financial parameters on the profitability of projects of energy efficient districts. The s…
Intermediate Isolation System with Nonlinear Lower Structure and Isolation System
2023
This paper reports a study on the Intermediate Isolation System (IIS) applied to existing buildings. This kind of application is particularly suitable when a vertical addition is planned for buildings in seismic zones; in such a case, an isolation system can be placed at the base of the extension to prevent the increase, or, better, to reduce the seismic demand on the existing structure. In previous works, parametric response spectrum analyses have been carried out on lumped mass models by varying the period of the isolation system. As a result, a sort of IIS design spectrum has been derived and used for selecting design solutions for the vertical extension that minimize the overall seismic…
Energy retrofit actions on Italian historical buildings: energy efficiency and feasibility. A review study.
2016
Today in EU, the growth in global primary energy consumption is decreasing. In 2014, Italy contributed with a global reduction of 17.1%, thanks to the application of EU measures on different areas. However, there is still much work to be done in order to make sustainable societies and territories, especially in buildings sector that has the greatest potentiality of energy saving. In particular, in the framework of Conservation, Restoration, Refurbishment, and Retrofit actions, the debate is still open, because many aspects must be considered and solved yet. In this paper, the state of the art of the Italian residential building heritage has been reviewed, applicable energy retrofit issues a…
L’ICT a supporto degli Eco-Regolamenti Edilizi - ICT for Eco-Building Regulations
2013
The issue of the Smart Cities as a model of sustainable urban future is preminent in the objectives of Horizon 2020 and the Technology Platform for Italian and European Construction. The main actor of this change is the Public Administration, which, through the Building Regulation, has to promote building processes, both new construction projects, but especially the requalification of the existing building stock, focusing on energy efficiency and sustainability. This implies the use of innovative technologies and new materials, components and systems (distributed micro-generation, solar cooling, etc.), Information and Communication Technologies (ICT) to improve the rational use of energy re…
Is there a Market Value for Energy Performance in a Local Private Housing Market ? An efficiency analysis approach
2018
This paper aims to find evidence of a “green value” in a local housing market using notarial data on a small urban area in France. We use frontier functions, an original approach that departs from customary hedonistic regressions, to model housing market prices as a production set bordered by an efficiency frontier estimated by Data Envelopment Analysis (DEA). The paper tests if difference in prices (i.e. the distance from the frontier) can be explained by energy performance measured as a normalized categorical ascending kWh/m²/year grade (or Energy Performance Certificate -EPC). We show that there is significative evidence for energy performance's market value. The “Green Property Value” i…
Energy Retrofit. A Case Study—Santi Romano Dormitory on the Palermo University
2021
Electrical and thermal consumption related to buildings, whether civil, commercial, public, or of any other kind, is very much in focus today. With today’s targets for energy savings, reduction of consumption, and environmental impact, it is necessary to carry out energy retrofits to modernize installations and their management. The realization of an effective improvement requires a careful analysis of the case study because each category of building has different requirements such as different load profiles and different installations and needs. This was carried out by studying the electrical and thermal load profiles. A good initial energy audit can provide the retrofit solutions capable …
Effetti energetico-ambientali di interventi di retrofit su un edificio residenziale monofamiliare in area mediterranea
2017
Gli interventi di retrofit sugli edifici esistenti costituiscono soluzioni tecnologiche fondamentali al fine di ridurre i consumi energetici e gli impatti ambientali degli edifici in fase di uso e di raggiungere condizioni di comfort negli spazi confinati. Per poter raggiungere gli obiettivi fissati dall’Unione Europea relativi alla diminuzione dei consumi di energia del settore civile, occorre individuare quali siano gli edifici che per primi devono essere sottoposti a interventi di retrofit e devono individuare le azioni che intendono promuovere. Questo capitolo rappresenta un utile strumento, per le amministrazioni così come per gli utenti finali, per stimare il risparmio di energia cons…
Approccio “Life Cycle Thinking” applicato alla riparazione di una scuola danneggiata dal terremoto dell’Italia centrale
2017
L’adeguamento sismico ed il miglioramento energetico delle strutture sono diventati al giorno d’oggi una priorità. Buona parte del patrimonio edilizio esistente si trova in stato di grande obsolescenza strutturale, architettonica ed energetica. Oltre alla prevenzione, tuttavia, un aspetto molto importante riguarda la riparazione e riqualificazione degli edifici resi inagibili dagli eventi sismici recentemente accaduti nel territorio nazionale. In modo particolare, nel presente articolo verrà preso in considerazione un edificio del plesso scolastico sito nel Comune di Pievebovigliana, provincia di Macerata, danneggiato dai terremoti che hanno colpito l’Italia centrale il 24.08.2016 e il 30.1…
Increasing the shear capacity of reinforced concrete beams using pretensioned stainless steel ribbons
2017
In this work, the second part of an experimental campaign investigating the efficiency of an alternative retrofitting method for increasing the flexural and/or shear capacity in reinforced concrete beams, based on the use of prestressed stainless steel ribbons and steel angles, is presented and analytically reproduced. This group of tests focuses on the ability of the adopted retrofitting method to improve the shear strength and ultimate deformation of reinforced concrete structural elements. As described in a companion paper, the adopted retrofitting method is alternative to traditional techniques of reinforced concrete retrofitting, being easy to install and usually reversible, and charac…
Analytical stress-strain law of FRP confined masonry in compression: Literature review and design provisions
2017
Abstract The use of Fibre Reinforced Polymer (FRP) wraps has become common in practical applications to retrofit existing columns with poor structural features. Wrapping the member with one or more FRP sheets makes it possible to induce confinement action and enhance strength and ductility. This application has been widely studied and adopted in reinforced concrete members for about twenty years, while its suitability to masonry columns and piers has been investigated during the last decade. The results of several studies were summarized in different design expressions for calculating effective confinement pressure, ultimate compressive stress and strain, and the overall trend of the stress…