Changes in renovation policies in the era of sustainability

Baek, Cheonghoon; Park, Sang Hoon

doi:10.1016/j.enbuild.2011.12.028

Cited by 82 publications

(44 citation statements)

References 20 publications

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“…Indeed, here the first regulation concerning the However, new buildings have little influence on the overall demand, since their incidence on the whole building stock is very low. Nowadays, new edifices increase the existing stock on average by less than 1.5% every year (Figure 6), while the demolition rate is estimated around 0.2-0.5% per year [4,28]. Therefore, nearly 85% of European building stock predicted for 2030 has already been built.…”

Section: Energy Performancementioning

confidence: 99%

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Seismic and Energy Renovation Measures for Sustainable Cities: A Critical Analysis of the Italian Scenario

Greca

Margani

2018

Sustainability

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Abstract:One of the main challenges of the twenty-first century is to increase the sustainability level of our cities. However, a town, to be considered sustainable, must, above all, be safe, particularly against natural hazards, which in Europe are mostly related to climate changes (e.g., hurricanes, floods, storms, and landslides) and seismic events (earthquakes). Unfortunately, sustainability is still not a prerogative of most European cities, especially those placed in seismic countries such as Italy, where at least 50% of the residential stock is earthquake-prone, while over 80% of the same stock is highly energy-consuming and carbon dioxide-emitting, thus contributing to trigger hazards related to climate changes. In this context, renovation actions, which combine both energy and seismic issues are strongly needed. Nevertheless, several technical, organizational and financial barriers considerably limit the real possibility to extensively undertake this kind of renovation. This study analyzes such barriers, with particular reference to the Italian scenario, suggesting and discussing possible solutions and underlining the advantages of increasing energy and seismic performances at the same time. The proposed solutions may be effectively extended to many other countries with similar socio-economic scenarios.

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Section: Energy Performancementioning

confidence: 99%

“…Indeed, here the first regulation concerning the Figure 6. Annual growth rate of new buildings added to the existing stock by nation [28].…”

Section: Energy Performancementioning

confidence: 99%

Seismic and Energy Renovation Measures for Sustainable Cities: A Critical Analysis of the Italian Scenario

Greca

Margani

2018

Sustainability

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“…Rome shows the maximum ERP of 95.80% and 89.02% for scenario B and scenario A respectively, while the minimum ERP of 53.32% and 47.12% for scenario B and scenario A respectively is in Messina. Naples has the highest relative difference of 8.43% between scenario B and A, while Catania has the lowest, 3 Evaporative cool tower (CT) with automatic control presents in Rome the highest DRP of 98.56% and 95.69% for scenario A and B respectively; the lowest DRP value of 73.48% for scenario A is in Messina and the lowest DRP of 69.89% for scenario B is in Naples. Naples depicts the maximum percentage difference of 4.18% between the two scenarios and Rome the minimum of 2.87%.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…An increasing concern about rational use of energy and the limits of land urbanization identifies the great potential of energy refurbishment of existing buildings [2,3] for energy consumption reduction and environmental impact mitigation. Energy refurbishment consists in applying the most appropriate technology to achieve improved energy performance while maintaining satisfactory levels of service and indoor hygrothermal comfort, under operational constraints [4].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of passive strategies for energy retrofit of existing buildings in Mediterranean climate: thermal mass and natural ventilation combination

2017

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Abstract. The study investigates the potential of coupling natural ventilation and thermal storage systems to improve hygrothermal comfort and reduce energy consumption during summer season in an existing building in the Mediterranean. It aims at bridging the knowledge gap between designers, researchers and building scientists, fostering a multidisciplinary approach and promoting numerical simulation of the energy performance of buildings within architectural professional practice. The study analyses the interaction between six natural ventilation systems (single sided ventilation through facade openings; cross ventilation through facade openings, inlet wind tower, thermal chimney, evaporative cool tower, earth pipes) and with two thermal storage typology (heavy and medium-light) within four strategic Italian location (Rome, Naples, Messina and Catania). For each interaction we perform a numerical dynamic simulation of indoor comfort, indoor air quality and energy consumption during the summer period, on a reference building model corresponding to the most common Italian typology. Results show that the use of the chosen systems ensures significant reductions of discomfort hours and energy consumption in all configurations. The study also highlights the high efficiency of non invasive systems (single-sided and cross ventilation with automatic control present discomfort hours reduction and energy consumption reduction above 68% for all combinations) and the significant influence of the daily thermal range value on the performance of systems without air pre-treatment.

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“…Presently, Italy has several funding laws and decrees for promoting energy conservation measures when not mandatory, by means of various shares of funding, from 40 to 65% of capital costs [12][13][14]. Similar laws were enacted in other European countries and, regarding this, a focus on Denmark, Sweden, Germany and France was recently proposed by Baek and Park [15], who underlined the necessity of well-calibrated energy policies for promoting effective refurbishments. In the same vein, Di Pilla et al [16] conducted a worthy investigation concerning the present and future trends of public incentives in the design of refurbishment with reference to the Italian panorama.…”

Section: Introduction: Importance Of Large-scale Energy Retrofit Of Tmentioning

confidence: 99%

Addressing Large-Scale Energy Retrofit of a Building Stock via Representative Building Samples: Public and Private Perspectives

et al. 2017

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Scientific literature about energy retrofit focuses on single buildings, but the investigation of whole building stocks is particularly worthy because it can yield substantial energy, environmental and economic benefits. Hence, how to address large-scale energy retrofit of existing building stocks? The paper handles this issue by employing a methodology that provides a robust energy analysis of building categories. This is denoted as SLABE, "Simulation-based Large-scale uncertainty/sensitivity Analysis of Building Energy performance". It was presented by the same authors and is here enhanced to investigate a whole and heterogeneous building stock that includes various categories. Each category is represented via a Representative Building Sample (RBS), which is defined through Latin hypercube sampling and uncertainty analysis. Hence, optimal retrofit packages are found in function of building location, intended use and construction type. Two families of optimal solutions are achieved. The first one collects the most energy-efficient (and thus sustainable) solutions, among the ones that produce global cost savings, thereby addressing the public perspective. The second one collects cost-optimal solutions thereby addressing the private perspective. EnergyPlus is employed as a simulation tool and coupled with MATLAB ® for data analysis and processing. The methodology is applied to a significant share of the Italian public administration building stock, which includes several building categories depending on location, use destination and construction type. The outcomes show huge potential energy and economic savings, and could support a deep energy renovation of the Italian building stock.

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Changes in renovation policies in the era of sustainability

Cited by 82 publications

References 20 publications

Seismic and Energy Renovation Measures for Sustainable Cities: A Critical Analysis of the Italian Scenario

Seismic and Energy Renovation Measures for Sustainable Cities: A Critical Analysis of the Italian Scenario

Numerical analysis of passive strategies for energy retrofit of existing buildings in Mediterranean climate: thermal mass and natural ventilation combination

Addressing Large-Scale Energy Retrofit of a Building Stock via Representative Building Samples: Public and Private Perspectives

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