Assessment of cost-optimality and technical solutions in high performance multi-residential buildings in the Mediterranean area

Zacà, Ilaria; D’Agostino, Delia; Congedo, Paolo Maria; Baglivo, Cristina

doi:10.1016/j.enbuild.2015.04.038

Cited by 76 publications

(40 citation statements)

References 34 publications

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“…In previous studies [15,16], the authors of this research investigate new mono and multi residential buildings as well as office buildings located in the Mediterranean climate [17]. The research showed that cost-optimal solutions reduce primary energy consumption between 68% and 95% compared with the reference scenario.…”

Section: Cost-optimal Studies Overviewmentioning

confidence: 99%

Efficient Solutions and Cost-Optimal Analysis for Existing School Buildings

et al. 2016

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Abstract:The recast of the energy performance of buildings directive (EPBD) describes a comparative methodological framework to promote energy efficiency and establish minimum energy performance requirements in buildings at the lowest costs. The aim of the cost-optimal methodology is to foster the achievement of nearly zero energy buildings (nZEBs), the new target for all new buildings by 2020, characterized by a high performance with a low energy requirement almost covered by renewable sources. The paper presents the results of the application of the cost-optimal methodology in two existing buildings located in the Mediterranean area. These buildings are a kindergarten and a nursery school that differ in construction period, materials and systems. Several combinations of measures have been applied to derive cost-effective efficient solutions for retrofitting. The cost-optimal level has been identified for each building and the best performing solutions have been selected considering both a financial and a macroeconomic analysis. The results illustrate the suitability of the methodology to assess cost-optimality and energy efficiency in school building refurbishment. The research shows the variants providing the most cost-effective balance between costs and energy saving. The cost-optimal solution reduces primary energy consumption by 85% and gas emissions by 82%-83% in each reference building.

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Section: Cost-optimal Studies Overviewmentioning

confidence: 99%

Efficient Solutions and Cost-Optimal Analysis for Existing School Buildings

et al. 2016

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“…Many of these studies aim at identifying the best combination in a building design in terms of costs, energy consumption and economic feasibility [56,57]. For example, studies on envelope, fenestration and technical systems have been carried out [58][59][60], proving that the combinations with high mass result the best solutions in terms of internal comfort and cost for warm climate. Valdiserri et al [61] show through retrofitting actions and economic assessment of an existing office building that the replacement of the windows results unprofitable.…”

Section: Comfort Assessment and Thermal Behaviourmentioning

confidence: 99%

Envelope Design Optimization by Thermal Modelling of a Building in a Warm Climate

Baglivo

Congedo

Cataldo³

et al. 2017

Energies

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Abstract:Finding the most appropriate configuration of building components at the design stage can reduce energy consumption in new buildings. This study aims to optimize the design of the envelope of a new residential building located in a warm climate (southern Italy). The thermal behaviour of the building has been analysed to evaluate the indoor operative air temperature for several configurations. The building prototype has been modelled using the dynamic simulation software TRNSYS 17 (A transient system simulation program, University of Wisconsin, Solar Energy Laboratory, USA, 2010) using a sequential search technique. Starting from the simplest building configuration, the main evaluated components are: walls, slab-on-ground floor, roof, shading, windows and internal heat loads. For each of these components, different design options have been modelled and compared in terms of indoor thermal comfort. Comfort parameters have also been taken into account to evaluate users' satisfaction with the optimized configurations. The study of the operative air temperature demonstrates that the absence of insulating layers in the ground floor ensures a lower internal temperature in summer. The paper shows how each component impacts the thermal behaviour of the whole building. It highlights the usefulness of the envelope design optimization that is characterized by high values of heat storage capacity, enabling internal temperature fluctuations to be kept under control, especially during summer.Keywords: envelope; optimization; building; TRNSYS; operative air temperature; warm climate; comfort HIGHLIGHTS:•The envelope design of a residential building has been optimized for a warm climate.• Several envelope design options have been evaluated and compared.• Walls with a high internal areal heat capacity are preferable in a warm climate. •The absence of insulating layers on slab-on-ground floor provides lower temperature in summer.• Low emissivity glass and low solar absorbance roof reduce heat loads.

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“…NZEB renovation combines high efficiency technologies with renewable production [17]. A reduction of primary energy demand is obtained through low-energy technologies (e.g., insulation, daylighting, high-efficiency HVAC, natural ventilation, evaporative cooling) while RES can be on-site or off-site depending on the availability on site (e.g., sun, wind) or to be transported to the site (e.g., biomass).…”

Section: Deep Major and Nearly Zero Energy Buildings Renovationsmentioning

confidence: 99%

Towards Nearly Zero Energy Buildings in Europe: A Focus on Retrofit in Non-Residential Buildings

2017

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Abstract:Buildings are the focus of European (EU) policies aimed at a sustainable and competitive low-carbon economy by 2020. Reducing energy consumption of existing buildings and achieving nearly zero energy buildings (NZEBs) are the core of the Energy Efficiency Directive (EED) and the recast of the Energy Performance of Building Directive (EPBD). To comply with these requirements, Member States have to adopt actions to exploit energy savings from the building sector. This paper describes the differences between deep, major and NZEB renovation and then it provides an overview of best practice policies and measures to target retrofit and investment related to non-residential buildings. Energy requirements defined by Member States for NZEB levels are reported comparing both new and existing residential and non-residential buildings. The paper shows how the attention given to refurbishment of NZEBs increased over the last decade, but the achievement of a comprehensive implementation of retrofit remains one of main challenges that Europe is facing.

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Assessment of cost-optimality and technical solutions in high performance multi-residential buildings in the Mediterranean area

Cited by 76 publications

References 34 publications

Efficient Solutions and Cost-Optimal Analysis for Existing School Buildings

Efficient Solutions and Cost-Optimal Analysis for Existing School Buildings

Envelope Design Optimization by Thermal Modelling of a Building in a Warm Climate

Towards Nearly Zero Energy Buildings in Europe: A Focus on Retrofit in Non-Residential Buildings

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