scholarly journals Strategically Measuring Quality of Existing Building Stock

2020 ◽  
Vol 14 (5) ◽  
pp. 63
Author(s):  
Arie Stapper ◽  
Christoph Maria Ravesloot
Keyword(s):  
Asset Management ◽  
Housing Stock ◽  
Single Case ◽  
Integrated Approach ◽  
Building Stock ◽  
Financial Return ◽  
Existing Building ◽  
Integrated Method ◽  
Strategic Value ◽  
Dutch Housing

Dutch housing corporations generally have two methods of assessing the strategic value of existing housing stock. The first is by calculating the financial return on investments with a life expectancy of fifty to sixty years. The second method is to balance the technical quality against maintenance and renovation planning. A Dutch housing corporation needed a integrated method, so in a single case study, a new method was developed based on research on how to monitor the technical and financial assets better. Four problems were detected: (1) the existing strategy did not seem to be resilient to future changes, (2) there was no instrument for measuring progress, (3) there was no way to translate strategic data to individual estates and (4) there was no instrument for monitoring the results of improvements set off against the strategic goals. With one integrated tool to fix these four problems, an integrated approach to a closed asset management strategy and policy would be available. Such a tool would make it possible to make adjustments to the strategy based on facts gained by measuring the results of former adjustments to the strategy. The goal of this paper is to present the research supporting the design of a new model. The result, the so called Return Matrix, is a fully elaborated model. It supports the management team in decision making about strategy (five years) and vision (twenty years) development. It creates insight into and support for the outcome of the strategy among policy professionals, staff and colleagues. And finally, it creates understanding among the tenants, it s understood and supported by the civil servants and gets approval and agreement of cooperation from the municipal executives. With the knowledge gained by this study, it will not be difficult to compose the instrument for other cases too.

Use of adaptable solutions to achieve near-zero energy buildings through a combined thermal and comfort performance approach

2019 ◽  
Vol 41 (3) ◽  
pp. 361-373
Author(s):  
Carlos Ochoa ◽  
Beth Massey
Keyword(s):  
Air Quality ◽  
Thermal Comfort ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Housing Stock ◽  
Integrated Approach ◽  
Energy Performance ◽  
Building Envelope ◽  
Zero Energy ◽  
Building Stock

The existing residential building stock in many industrialized countries is large but extremely energy inefficient, despite the existence of energy directives that apply mostly to new construction. Prefabricated building refurbishment for energy upgrading is a viable option for the existing building stock, but solutions need to adapt to each case and usage in order to respond to specific requirements. The “RECO2ST” project (Horizon 2020) is used as example of a forecast methodology that can help achieve nearly zero energy refurbishments, through selection of innovative modular elements for the opaque and transparent areas of the building envelope, covering diverse energy reduction strategies while improving thermal comfort and indoor air quality. This integrated approach is not usual in the field. The Technical Note studies a series of facade and active window technologies that supply climate strategies such as insulation, heat recovery and ventilation. The methodology is demonstrated for three sample cases using a typical refurbishment scenario. It is evaluated through energy simulation and analysis of improvements in thermal comfort and indoor air quality indicators. Practical application: The methodology helps to reduce guesswork for actions to be taken in order to refurbish and upgrade the existing housing stock to comply with current energy directives. It takes into account at the same time energy performance and user comfort, as expressed through indoor air quality.

Upgrading Energy Efficient Housing and Creating Jobs: It Works Both Ways

2014 ◽  
Vol 39 (2) ◽  
pp. 34-40
Author(s):  
Frits Meijer ◽  
Henk Visscher
Keyword(s):  
Energy Efficiency ◽  
Large Scale ◽  
Housing Stock ◽  
Energy Performance ◽  
Housing Associations ◽  
Building Stock ◽  
Existing Building ◽  
Investment Programme ◽  
The Eu ◽  
New Jobs

The European Commission and EU member states have prioritised the renovation of the existing housing stock as a means of achieving their energy-efficiency targets. As buildings account for 40% of Europe’s energy consumption and much of this is used in the residential sector a major breakthrough could be realized here. Despite the fact that energy saving targets have been prioritized in EU and national policy programme’s, progress is slow. The actual rate and extent of renovations are by fare not enough to achieve the targets. Although the necessity of energy savings is acknowledged by institutional investors in housing, housing associations, individual homeowners and occupants, it appears to be difficult to get sufficient support for energy efficiency renovations. The current economic situation is an additional barrier preventing large scale investments in energy renovating the housing stock. This article connects the realisation of energy efficiency goals with the creation of jobs in the EU. The shift from new-build to renovation will have considerable effects on employment in especially the construction industry and the qualifications required by the workforce. Studies show that for every €1 million investment in the existing building stock in the form of energy renovation work, 12 to 17 new jobs could be created. Potentially this could lead to may new jobs. However, there are many uncertainties in these calculations. Are these direct or indirect jobs, what sectors would benefit, are these jobs created within the EU and what would be the net effect on the labour market? Nonetheless these uncertainties, the positive employment effects will prevail. A new and ambitious investment programme in the housing sector could not only improve the energy performance of the sector but create 100.000’s of valuable jobs at a time when these are seriously needed.

scholarly journals Proposal for a Methodology for Sustainable Rehabilitation Strategies of the Existing Building Stock—The Ponte Gêa Neighborhood

Designs ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 26
Author(s):  
Michael M. Santos ◽  
João C. G. Lanzinha ◽  
Ana Vaz Ferreira
Keyword(s):  
Urban Space ◽  
Construction And Demolition Waste ◽  
Expected Improvement ◽  
Water Efficiency ◽  
Building Stock ◽  
Demolition Waste ◽  
Existing Building ◽  
Agenda 2030 ◽  
Development Agenda ◽  
The City

Having in mind the objectives of the United Nations Development Agenda 2030, which refers to the sustainable principles of a circular economy, it is urgent to improve the performance of the built environment. The existing buildings must be preserved and improved in order to reduce their environmental impact, in line with the need to revert climate change and reduce the occurrence of natural disasters. This work had as its main goal to identify and define a methodology for promoting the rehabilitation of buildings in the Ponte Gêa neighborhood, in the city of Beira, Mozambique, with an emphasis on energy efficiency, water efficiency, and construction and demolition waste management. The proposed methodology aims to create a decision support method for creating strategic measures to be implemented by considering the three specific domains—energy, water, and waste. This model allows for analyzing the expected improvement according to the action to be performed, exploring both individual and community solutions. It encompasses systems of standard supply that can reveal greater efficiency and profitability. Thus, the in-depth knowledge of the characteristics of urban space and buildings allows for establishing guidelines for the renovation process of the neighborhood.

scholarly journals Optimal Renovation Strategies through Life-Cycle Analysis in a Pilot Building Located in a Mild Mediterranean Climate

2021 ◽  
Vol 11 (4) ◽  
pp. 1423
Author(s):  
José Manuel Salmerón Lissen ◽  
Cristina Isabel Jareño Escudero ◽  
Francisco José Sánchez de la Flor ◽  
Miriam Navarro Escudero ◽  
Theoni Karlessi ◽  
...  
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Mediterranean Climate ◽  
Building Envelope ◽  
Economic Life ◽  
Hot Water ◽  
Optimal Solutions ◽  
Building Stock ◽  
Existing Building ◽  
The Cost

The 2030 climate and energy framework includes EU-wide targets and policy objectives for the period 2021–2030 of (1) at least 55% cuts in greenhouse gas emissions (from 1990 levels); (2) at least 32% share for renewable energy; and (3) at least 32.5% improvement in energy efficiency. In this context, the methodology of the cost-optimal level from the life-cycle cost approach has been applied to calculate the cost of renovating the existing building stock in Europe. The aim of this research is to analyze a pilot building using the cost-optimal methodology to determine the renovation measures that lead to the lowest life-cycle cost during the estimated economic life of the building. The case under study is an apartment building located in a mild Mediterranean climate (Castellon, SP). A package of 12 optimal solutions has been obtained to show the importance of the choice of the elements and systems for renovating building envelopes and how energy and economic aspects influence this choice. Simulations have shown that these packages of optimal solutions (different configurations for the building envelope, thermal bridges, airtightness and ventilation, and domestic hot water production systems) can provide savings in the primary energy consumption of up to 60%.

scholarly journals RINNO: Towards an Open Renovation Platform for Integrated Design and Delivery of Deep Renovation Projects

2021 ◽  
Vol 13 (11) ◽  
pp. 6018
Author(s):  
Theo Lynn ◽  
Pierangelo Rosati ◽  
Antonia Egli ◽  
Stelios Krinidis ◽  
Komninos Angelakoglou ◽  
...  
Keyword(s):  
Value Chain ◽  
Residential Buildings ◽  
Integrated Design ◽  
Energy Performance ◽  
Building Stock ◽  
Existing Building ◽  
Horizon 2020 ◽  
Regulatory Standards ◽  
Automation Systems ◽  
Wide Range

The building stock accounts for a significant portion of worldwide energy consumption and greenhouse gas emissions. While the majority of the existing building stock has poor energy performance, deep renovation efforts are stymied by a wide range of human, technological, organisational and external environment factors across the value chain. A key challenge is integrating appropriate human resources, materials, fabrication, information and automation systems and knowledge management in a proper manner to achieve the required outcomes and meet the relevant regulatory standards, while satisfying a wide range of stakeholders with differing, often conflicting, motivations. RINNO is a Horizon 2020 project that aims to deliver a set of processes that, when working together, provide a system, repository, marketplace and enabling workflow process for managing deep renovation projects from inception to implementation. This paper presents a roadmap for an open renovation platform for managing and delivering deep renovation projects for residential buildings based on seven design principles. We illustrate a preliminary stepwise framework for applying the platform across the full-lifecycle of a deep renovation project. Based on this work, RINNO will develop a new open renovation software platform that will be implemented and evaluated at four pilot sites with varying construction, regulatory, market and climate contexts.

scholarly journals Life-Cycle Assessment of a Rural Terraced House: A Struggle with Sustainability of Building Renovations

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2472
Author(s):  
Karel Struhala ◽  
Milan Ostrý
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Energy Sources ◽  
Construction Sector ◽  
Building Stock ◽  
Existing Building ◽  
New Construction ◽  
Consumption Energy

Contemporary research stresses the need to reduce mankind’s environmental impacts and achieve sustainability. One of the keys to this is the construction sector. New buildings have to comply with strict limits regarding resource consumption (energy, water use, etc.). However, they make up only a fraction of the existing building stock. Renovations of existing buildings are therefore essential for the reduction of the environmental impacts in the construction sector. This paper illustrates the situation using a case study of a rural terraced house in a village near Brno, Czech Republic. It compares the life-cycle assessment (LCA) of the original house and its proposed renovation as well as demolition followed by new construction. The LCA covers both the initial embodied environmental impacts (EEIs) and the 60-year operation of the house with several variants of energy sources. The results show that the proposed renovation would reduce overall environmental impacts (OEIs) of the house by up to 90% and the demolition and new construction by up to 93% depending on the selected energy sources. As such, the results confirm the importance of renovations and the installation of environmentally-friendly energy sources for achieving sustainability in the construction sector. They also show the desirability of the replacement of inefficient old buildings by new construction in specific cases.

Deep renovation up to zero energy through Add-ons: the ABRACADABRA Project

2019 ◽  
Author(s):  
Annarita Ferrante ◽  
Fabrizio Ungaro ◽  
Giovanni Semprini ◽  
Lorna Dragonetti ◽  
Elettra Agliardi ◽  
...  
Keyword(s):  
Cost Effective ◽  
Urban Environments ◽  
Zero Energy ◽  
Urban Context ◽  
Building Stock ◽  
Existing Building ◽  
The Real Estate ◽  
International Projects ◽  
Eu Project ◽  
The Eu

<p>and international projects</p><p>various EU H2020 projects</p><p>Though housing is one of the most energy consumer sectors, it is currently extremely underestimated, because of a clear investment gap due to economic, social and legislative barriers. The EU project ABRACADABRA (Assistant Building to Retrofit, Adopt, Cure And Develop the Actual Buildings up to zeRo energy, Activating a market for deep renovation) is based on the idea that the real estate value increase given by the appropriate densification strategy in urban environments could be an opportunity to activate a market for deep energy renovation. To prove the effectiveness of the strategy more than 70 case studies throughout the EU cities have been assessed by means of a cost-effective analysis. Basing on the parametric variation of the different values involved (cost of construction, energy, etc.) the benefit of this strategy has been proved in the majority of the different building types and contexts.</p><p>More interestingly, the ABRA strategy has been simulated and tested outside Europe in order to verify its scalability and the possibility of considering other non-energy related benefits in the renovation of the existing building stock. A specific study on the NYC urban context has been conducted to effectively adapt the strategy and combine the global drivers of energy consumption reduction and CO<span>2</span> emission reduction with the local need of combating flood emergency and related flood-proofing measures.</p><p>The results reached by this work demonstrate how the energy retrofit trough add-ons reduces significantly the payback times of the investments, preserve soil consumption, while providing a extraordinary opportunity to enhance urban resiliency by challenging the local emergencies.</p>

Socioeconomic Clustering in Seismic Risk Assessment of Urban Housing Stock

2009 ◽  
Vol 25 (3) ◽  
pp. 619-641 ◽  
Author(s):  
J. S.R. Prasad ◽  
Yogendra Singh ◽  
Amir M. Kaynia ◽  
Conrad Lindholm
Keyword(s):  
Risk Assessment ◽  
Seismic Risk ◽  
Model Building ◽  
Housing Stock ◽  
Indian Subcontinent ◽  
Sample Survey ◽  
Economic Losses ◽  
Urban Habitat ◽  
Building Stock ◽  
Seismic Risk Assessment

A seismic risk assessment methodology based on socioeconomic clustering of urban habitat is presented in this paper. In this methodology, the city is divided into different housing clusters based on socioeconomic level of occupants, representing reasonably uniform seismic risk. It makes an efficient utilization of high resolution satellite data and stratified random sample survey to develop the building stock database. Ten different classes of socioeconomic clusters found in Indian cities are defined and 34 model building types (MBTs) prevalent on the Indian subcontinent have been identified and compared with the Medvedev-Sponheuer-Karnik (MSK) scale, European macroseismic scale (EMS), parameterless scale of seismic intensity (PSI), and HAZUS classifications. Lower and upper bound damage probability matrices (DPMs) are estimated, based on the MSK and EMS intensity scales and experience from past earthquakes in India. A case study of Dehradun, a city in the foothills of Himalayas, is presented. The risk estimates using the estimated DPMs have been compared with those obtained using the PSI scale. It has been observed that poorer people are subjected to higher seismic risk, both in terms of casualties and in terms of percent economic losses.

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