Economic efficiency of social housing thermal upgrade in Mediterranean climate

Desogus, Giuseppe; Pilla, Lorenza Di; Mura, Salvatore; Pisano, Gian Luca; Ricciu, Roberto

doi:10.1016/j.enbuild.2012.11.016

Cited by 28 publications

(15 citation statements)

References 17 publications

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“…As far as the Italian housing stock is concerned, a recent study analyses several upgrading options of buildings energy performance (Desogus et al, 2013), according to regulation in force until a short time ago (previously: Legislative Decrees 192/2005 and 311/2006; subsequently: Ministerial Decrees 11/03/2008 and 26/ 01/2010). In mentioned study, all alternatives are profitable except one.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Assuming an average energy supply price of 0.15 euros/kWh (Turola, 2006;Desogus et al, 2013), energy related costs should be expected to be about 9.15 euros/m 2 year, while annual operating costs for public housing commonly lie in the range from 40 to 60 euros/m 2 (Federcasa, 2014).…”

Section: Refurbishment Interventionmentioning

confidence: 99%

“…Desogus et al (2013) analysed three public housing buildings erected during the fifties, finding annual energy use in the range from 128 to 131 kWh/m 2 year for semi-detached and terraced houses, up to 156 kWh/m 2 year with regard to the case of a multi-storey building. Retrofit scenarios proposed by authors lead energy consumption of the latter down to the range from 83 to 93 kWh/m 2 year, but case studies benefit from mild climate conditions, namely they fall within a more favourable climate zone being 990 the amount of heating degree days.…”

Section: Refurbishment Interventionmentioning

confidence: 99%

See 2 more Smart Citations

Achieving affordable housing through energy efficiency strategy

Copiello

2015

Energy Policy

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Section: Literature Reviewmentioning

confidence: 99%

Section: Refurbishment Interventionmentioning

confidence: 99%

Section: Refurbishment Interventionmentioning

confidence: 99%

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Achieving affordable housing through energy efficiency strategy

Copiello

2015

Energy Policy

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“…To investigate the state of knowledge and the risk of performance failure, a study was conducted in Sweden in which concluded that the state of knowledge were low and simplified methods used were not accurate [10]. The study further concluded that only 11% of the academic publications included in the study [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] clearly defined how they quantified building elements (i.e., measuring method).…”

Section: Internal Dimensionsmentioning

confidence: 99%

State of Knowledge of Thermal Bridges—A Follow up in Sweden and a Review of Recent Research

Berggren

Wall

2018

Buildings

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It is important to minimize transmission heat transfer losses through the building envelope when designing and building energy efficient buildings in heating dominated climates. In such a climate, a large part of the space heating demand is caused by transmission heat transfer losses through the building envelope. Calculations of these losses must be carried out in a correct way to ensure a properly sized heating system and a good indoor climate. Furthermore, underestimating the transmission heat transfer may lead to energy costs that exceed expectations. A Swedish study was published five years ago which concluded that the state of knowledge was low and simplified methods used were not accurate. Five years has passed since the previous study. The purpose of this follow-up is to investigate whether the state of knowledge among Swedish consultants has increased and to review the progress within the international field. The study shows that little has changed in Sweden. The state of knowledge regarding different measuring methods and the effect on thermal bridges is still not satisfying. Furthermore, the review of recent research shows that the relative effect of thermal bridges vary greatly. More guidelines and education/training are needed. Further research should be carried out with a holistic approach where thermal bridges are investigated with varying construction types, energy efficiency of building envelopes and different measuring methods. climate is achieved by constructing an air tight and well insulted building envelope combined with balanced mechanical ventilation with high heat recovery efficiency. Designing a building according to these principles will result in that the majority of the heating demand is due to transmission heat transfer through the building envelope. Hence, it is important to calculate the transmission heat transfer in a correct way and not underestimate or exclude potential thermal bridges.A heating dominated climate may be defined as a climate where 70% or more of the space conditioning needs is related to heating [4]. It should be noted that also in a heating dominated climate up to 30% of the space conditioning needs may be related to cooling. Hence, buildings still need to be designed to avoid excess temperatures during the warmer part of the year.As mentioned, EPBD2 states that methodology for calculations should take into account European standards and be expressed in a transparent way. Standards are important as they provide reliability, predictability and security. Furthermore, they facilitate communication between different actors, minimizing the risk of misunderstanding. This leads to profits, both from a business perspective and from a macroeconomic perspective [5].A commonly used standard to calculate transmission heat transfer through a building envelope is EN ISO 13789 [6] which in turn refers to two standards regarding thermal bridges; EN ISO 14683 [7] provides a simplified method including default values of linear thermal transmittance and EN ISO 10211 [8] provides...

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“…Residential buildings which are responsible for about 27% of overall energy consumption and approximately 68% of energy consumption in building stock, cover approximately 75% of the whole building area in EU [1]. It is estimated that three-quarters of the housing stock to be found in 2050 already exists [2], and currently, about 35% of buildings are over 50 years old [3]. In Turkey, the construction sector's total energy consumption of total energy-related emissions of CO2 emissions from the construction sector constitutes about 35% and 32%.…”

Section: Introductionmentioning

confidence: 99%

A Long-term Strategy for Energy and Cost Performance Improvement of Existing Residential Buildings: Step-by-step Renovation in Turkey

2019

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Recast version of Energy Performance of Building Directive (EPBD-Recast) obligate member states to keep the cost analysis in parallel with the energy analysis during the renovation actions for the existing building by taking the cost-optimal level of minimum energy performance requirement to the account. Although this cost-optimal level is indicating the minimum cost level for a period, it can provide buildings’ owners with an enormous initial cost. One of the most challenging barriers to energy efficient and cost-optimal renovation of existing buildings is the reluctance of owners to involve in their project as an investor due to the high cost of application. Particularly in developing countries, such reluctance is more tangible as the governments are not capable of providing enough financial incentives for owners due to a large number of buildings that should be renovated and small available budget. A proper solution for the problem is to divide necessary actions for each building to certain sub-actions and apply them as a step-by-step renovation project. On the other hand, the progressive application of renovation activities has some restrictions. It is necessary to define the due amount for households and keep the cost of each step within the payable range. Moreover, the low rate of building renovation which affects the EU goals can be improved remarkably by application of step-by-step actions not only by increasing the number of owners’ contributions but also by improving the time of implementation, proper distribution of skilled labours and directed economic resources. This paper aims to assess the step-by-step application of the energy efficient renovation actions through energy and cost analysis under Turkey’s climatic, economic and sociological conditions. One of 26 reference residential buildings in Turkey is analysed in this paper. The due amount for each step is defined, and some renovation actions and their combinations applied to the case building and the results compared with the base condition. Then a proper combination of measures established based on the cost-optimal analyses. These appropriately combined actions are then divided into some sub-actions; following this, cost and energy studies are conducted again to determine the appropriate arrangement of sub-actions.

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Economic efficiency of social housing thermal upgrade in Mediterranean climate

Cited by 28 publications

References 17 publications

Achieving affordable housing through energy efficiency strategy

Achieving affordable housing through energy efficiency strategy

State of Knowledge of Thermal Bridges—A Follow up in Sweden and a Review of Recent Research

A Long-term Strategy for Energy and Cost Performance Improvement of Existing Residential Buildings: Step-by-step Renovation in Turkey

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