Open House International

Nascimento, Denise Morado

2012 Open House International

doi: 10.1108/OHI-04-2012-B0001

Interview with Dutch architect N. John Habraken; his Supports' theory is made explicit aligned with the approach of the Open Building movement. It aims to understand it in order to make it possible into the context of Brazilian contemporary architecture.

Mallick, Fuad H.; Mourshed, Monjur

2012 Open House International

doi: 10.1108/OHI-04-2012-B0002

The interdependence and feedback between climate impacts mitigation and adaptation to the inevitable changes in climate are the key challenges for the built environment in the coming decades. These challenges are more pronounced in the interface between science and society, in which scientific knowledge and evidence are transformed into policy actions. This editorial looks at current and growing evidence base on the impacts of climate change and the means to adapt buildings, as well as the interface between policies and evidence base while summarising the contributions to this special issue.

Marsh, Rob

2012 Open House International

doi: 10.1108/OHI-04-2012-B0003

Climate change means that buildings must greatly reduce their energy consumption. It is however paradoxical that climate mitigation in Denmark has created negative energy and indoor climate problems in housing that may be made worse by climate change. A literature review has been carried out of housing schemes where climate mitigation was sought through reduced space heating demand, and it is shown that extensive problems with overheating exist. A theoretical study of regulative and design strategies for climate mitigation in new build housing has therefore been carried out, and it is shown that reducing space heating with high levels of thermal insulation and passive solar energy results in overheating and a growing demand for cooling.Climate change is expected to reduce space heating and increase cooling demand in housing. An analysis of new build housing using passive solar energy as a climate mitigation strategy has therefore been carried out in relation to future climate change scenarios. It is shown that severe indoor comfort problems can occur, questioning the relevance of passive solar energy as a climate mitigation strategy. In conclusion, a theoretical study of the interplay between climate adaptation and mitigation strategies is carried out, with a cross-disciplinary focus on users, passive design and active technologies. It is shown that the cumulative use of these strategies can create an adaptation buffer, thus eliminating problems with overheating and reducing energy consumption. New build housing should therefore be designed in relation to both current and future climate scenarios to show that the climate mitigation strategies ensure climate adaptation.

Bennetts, Helen; Pullen, Stephen; Zillante, George

2012 Open House International

doi: 10.1108/OHI-04-2012-B0004

Over the last two decades the average floor area of new houses in Australia has increased significantly. This has coincided with greater expectations of thermal comfort in homes. In certain locations, the result has been an escalation of the use of large mechanical air conditioning systems in houses. Since it is predicted that climate change will lead to an increase in the frequency and severity of extreme weather events such as heatwaves, the future maintenance of thermal comfort in houses in an affordable manner is likely to be challenging. This will have implications not only for the health and comfort of the occupants but also for peak energy loads. A compounding factor is the likelihood of increased energy prices caused, in part, by financial mechanisms aimed at minimising greenhouse gas emissions. There will be sections of the community, such as the elderly and the less well off, that will be particularly vulnerable to these combined factors.This paper explores design strategies that could be incorporated in new and existing houses to improve thermal comfort for residents during heatwaves. It is shown that during such periods, behaviour change, thermal comfort requirements and extra energy consumption have a strong influence on devising solutions for this challenge. The results of a pilot study are given that indicate opportunities for creating cool refuges in the existing dwelling stock.

Abdul-Aziz, Abdul-Rashid; Ofori, George

2012 Open House International

doi: 10.1108/OHI-04-2012-B0005

From interviews with selected experts and secondary sources, this paper charts the actions that led to Malaysia having its own green building rating tool. It began with the Institution of Architects Malaysia and the Institution of Engineers Malaysia working together in 2008 to come up with the Green Building Index (GBI) specifically suited for the Malaysian condition. The index was launched a year later, the same year that a new prime minister came into office. With greening the economy in mind, he launched a few major initiatives, one of which was the creation of the Ministry of Energy, Green Technology and Water to replace the Ministry of Energy, Water and Communications and another was the launching of the National Technology Policy. In December 2009, he made the commitment on Malaysia's behalf to reduce carbon dioxide emission at the Copenhagen Summit, thereby cementing his commitment to green issues at the international level. Behind-the-scene lobbying by the private sector resulted in the government explicitly endorsing the GBI by tying GBI certification of buildings to financial incentives. This paper makes the case that the strong cooperation between the private sector and the government over the GBI represents a form of public-private partnership on aspects of collaborative spirit, complementarity of resources, private sector leadership, wide-ranging ramifications over other partnerships across time, timing and sustainability. Other countries intending to come up with their own rating tool can take stock of the Malaysian experience.

Shikder, Shariful; Mourshed, Monjur; Price, Andrew

2012 Open House International

doi: 10.1108/OHI-04-2012-B0006

Recent climate change projections estimate that the average summertime temperature in the southern part of Great Britain may increase by up to 5.4°C by the end of the century. The general consensus is that projected increases in temperature will render British dwellings vulnerable to summer overheating and by the middle of this century it may become difficult to maintain a comfortable indoor environment, if adaptation measures are not well integrated in the design and operation of new dwellings, which are likely to remain in use beyond the 2050s. The challenge is to reduce overheating risks by integrating building and user adaptation measures, to avoid energy intensive mechanical cooling. Developing guidelines and updating building regulations for adaptation, therefore, requires an understanding of the baseline scenario; i.e. the performance of existing buildings in future climates.This paper aims to investigate the performance of new-build multi-occupancy British dwellings for human thermal comfort in the present-day and projected future climates in four regional cities: Birmingham, Edinburgh, London and Manchester. Evaluations are carried out by a series of dynamic thermal simulations using widely adopted threshold temperature for overheating, as well as adaptive thermal comfort standards. This study thus offers a unique perspective on regional variations of performance and provides a clearer snapshot because of the use of more appropriate adaptive comfort standards in the evaluations. Finally, the paper sheds light on possible personal and building adaptation measures to alleviate overheating risks.

Roders, Martin; Straub, Ad; Visscher, Henk

2012 Open House International

doi: 10.1108/OHI-04-2012-B0007

Climate change: the question is not anymore if it happens, but what the impact is of its effects such as drought, heat waves and increased precipitation on the quality of our lives in cities, offices and houses. A significant share of the Northern European housing stock is owned and maintained by large stock owners, such as housing associations. It is their responsibility to be aware of changes and risks that might challenge the quality of life of their tenants. Moreover, in order to provide housing with a good market value in the future, adaptation to climate change can no longer be overlooked.With the aim to discover the level of awareness of climate change adaptation among Dutch housing associations, a content analysis was undertaken on the policy plans and the annual reports of the 25 largest housing associations. Subsequently they were classified according to their level of awareness. The analysis returned no topics that directly referred to climate change adaptation, which implies that all housing associations are categorised as being ‘unaware’. Therefore, in order to reach higher levels of awareness and to incentivize the implementation of adaptation measures, appropriate governance strategies need to be developed. Future research will define the characteristics of these strategies in relation to the level of awareness of the housing associations. Adoption of the measures could be easier if adaptation measures are combined with maintenance activities, as this has been the case with mitigation measures.

Adebamowo, Mike; Ilesanmi, Adetokunbo O.

2012 Open House International

doi: 10.1108/OHI-04-2012-B0008

Buildings have a considerable impact on the environment being responsible for a substantial proportion of global energy consumption, thus contributing significantly to the anthropogenic CO2 emissions, which evidence suggests is the main cause of climate change. Mitigation and adaptation measures are required to tackle the challenges of climate change. Adaptive measures – structural and behavioural strategies – are the focus of this paper. Structural strategies include flexible and adaptive structural systems; while behavioural strategies cover the spatial, personal, and psychological control measures which may influence the design and operations of buildings. The study explores the adaptive thermal comfort of occupants and examines the design strategies for adapting buildings to climate change in the tropical context, with a view to determine the effectiveness of these strategies as observed in the case study. The study was conducted during the rainy and dry seasons in Abeokuta, Ogun State, Nigeria, located in a warm humid climate zone.The Institute of Venture Design student hostel was used as case-study to conduct the survey on a sample of 40 respondents by means of structured questionnaire. The respondents' thermal sensation and access to thermal controls were determined, and their thermal sensation and thermal adaptability in both seasons comparatively analyzed. Indoor environmental parameters including air temperature, mean radiant temperature, relative humidity and air velocity were also measured. The data were analyzed using relevant descriptive and inferential statistics. The study discussed the effectiveness of design strategies available for building adaptation in an era of climate change within the warm humid environment, concluding on the need for greater synergy between the techno-structural and socio-behavioural dimensions of building adaptation.

Rasmussen, T. Valdbjørn

2012 Open House International

doi: 10.1108/OHI-04-2012-B0009

Buildings play a vital economic and social role in society and are vulnerable to climate change. This paper suggests a strategic approach for existing buildings to withstand climate change. It emphasises the most likely climate impacts, including the change in mean year values as well as the extent of maximum and minimum extremes, which are pointed out and set against a background of national and international agreements. Assumptions that form the basis for the scenarios are outlined and evaluated in a Danish context and similar evaluations can be drawn for other countries. As climate change progresses, the uncertainty of the scenarios leaves major challenges that will grow far more serious, if not addressed and taken into account in building design and into a strategy for the adaptation of existing buildings.An outline of the actions needed for developing a broad strategic approach to the adaptation to climate change for buildings is given. The actions include four stages: a survey of the performance, the impact of climate change, the vulnerability of the existing building stock and climate adaptation needs. This leads to the identification of a risk-based strategic framework for adaptation to climate change based on the results of a vulnerability analysis. In addition, this paper describes some issues that must be addressed in case a strategic approach is not developed, as the building sector is continuously investing in measures to adapt to climate change.

Oktay, Derya

2012 Open House International

doi: 10.1108/OHI-04-2012-B0010

THE PRINCIPLES OF GREEN URBANISM: Transforming the City for Sustainability