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- Gohardani, Navid, et al.
(author)
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A simulation approach towards a sustainable building design based on energy analysis
- 2013
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In: ICSDEC 2012. - Reston, VA : American Society of Civil Engineers (ASCE). - 9780784412688 ; , s. 29-36
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Conference paper (peer-reviewed)abstract
- A simulation approach is undertaken in order to analyze a planned building design based on peak load heating and peak load cooling analysis of an analytical model of the building. The geometry of the building enables a wide spectrum of modifications to be applied to the existing design. These simplistic modifications are utilized in order to estimate the influence of modifications in the design process on a number of performance parameters. In particular, sustainability has been assessed based on modified geometries and different geographical locations of the generic building structure. The employed methodology establishes a foundation for comparison between the original building design and a modified one, with particular significance placed on sustainable building design and the overall building performance. In light of the obtained results in this study, a relation between different geographical locations originating from a database of global weather information and building design can be presented for a generic building with emphasis on sustainability.
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| 4. |
- Gohardani, Navid, 1979-
(author)
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An Approach Towards Sustainable Building
- 2014
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Doctoral thesis (other academic/artistic)abstract
- The motivation for development of energy efficiency and implementation of novel advanced materials applied in buildings can be traced to increasing energy costs in conjunction with an enhanced environmental awareness among people. This doctoral dissertation presents contributions towards sustainable building, where factors such as building technology, energy efficiency in buildings, workers' health issues during construction measures, and certain economic considerations for renovation of buildings have been considered. The research study aims to provide a knowledge base for motivating building owners to renovate buildings based on energy efficiency and improved indoor environment. The initial phase of the research study identifies a detailed description of common drivers, expected in renovation projects by building owners. In the second phase, an information base is identified which may facilitate the bidding processes for decision makers by means of technological, social and economic aspects. The aforementioned information base can also contribute to attentive decisions regarding sustainable renovation and energy saving measures. A strategy was developed within the Renovation Workshop of Riksbyggen, in order to promote energy saving measures concurrent with major renovations in residential buildings. This operational decision support process was applied in a tenant owners' cooperative in Sweden. The objective of this process was to showcase and more importantly to implement energy saving measures, based on knowledge transfer between different parties involved in the renovation project. For the conducted case study, this process was shown to be of great importance when decisions regarding energy saving measures in conjunction with scheduled renovations are being planned. A unique case study was conducted on two of the most commonly used environmental certification programs for buildings in Sweden; Environmental Building (Miljöbyggnad) and GreenBuilding. Following a granted access to a limited database of submitted applications to Sweden Green Building Council, the most common mistakes in these were identified and categorized. This study contributed to further understanding about the level of ability among building consultants, comprehension of environmental certification, and enhancement of the ability to produce high-quality calculations concerning building-related energy usage. In addition, this insight can provide a basis for planning of continuing education of consultants within the field of building technology. For a church building, a study was conducted subsequent to an exchange of an existing electric coil heating system to a hydronic ground source heat pump system. Analyses of the energy demand and energy signature, prior to and after installation were carried out. The replacement of the original heating system with a ground source heat pump system for the church building constitutes a reduced energy consumption level of approximately 66%, at the average outside temperature of -2.30 °C. This study demonstrated that data from a detailed electric bill can be utilized in order to obtain the energy signature of the building and henceforth assess the energy savings. One aspect of the research, examined the decision making process related to sustainable renovation and refurbishment in buildings. The utilized methodology identified three distinct phases in order to instigate an engagement in sustainable renovation, by means of questionnaires and semi-structured interviews. In particular, the attitudes of stakeholders in Sweden, Denmark and Cyprus to sustainable building were studied through three separate case studies. Within the framework of this study, it was identified that building physics and durability are among the most important drivers for energy renovation. The results provided an insight into the renovation process in the aforementioned countries and identified that drivers such as improvement of indoor air quality and elimination of moisture in the building envelope are also of crucial importance. Another aspect of the conducted research highlights workplace accidents occurring within the Swedish construction sector. The purpose of this study was to serve as a useful tool to track the working environments of construction workers in order to reduce health and safety issues within the construction sector. The findings of this research suggest that despite laws, regulations or additional factors that seek to ensure a safe and healthy environment for construction workers, the Swedish construction work force still faces challenges. Moreover, it is identified that construction workers participating in the study call for additional measures to ensure occupational health and safety. Improved knowledge of economic performance and technical results of renovations can contribute to a snowball effect, with more property owners recognizing the value of energy aspects and thus provide an increased level of energy savings.
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| 5. |
- Gohardani, Navid
(author)
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Architecture and Design Research : Reflections in relation to the design process
- 2011
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In: Archnet-IJAR. - 1994-6961 .- 1938-7806. ; 5:3, s. 107-115
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Journal article (other academic/artistic)abstract
- Research endeavors in architectural design date back to the foundations of building construction itself. Remarkably, the true limitations of design procedures stem from the confined boundaries preset in the mind of mankind. Even the perceptions an architect holds throughout the complex process of designing an architectural wonder, contributes to a fundamental impact on the performed procedures commonly applied. Research methodologies in architecture and design, tend to primarily focus on architectural visions, trends or the actual design features of a construction, and not on the person behind it all. Following efforts directed towards a trajectory that encircles the architect and his or her perception regarding architecture and design research, this work aims to highlight the views of many prominent architects whose architectural wonders have served as crucial milestones in history and influenced generations of people. A weave between an architect and her or his surroundings, cannot be treated as an isolated event. Puzzle pieces of gender roles, performatives, social influences, and insight regarding architectural research methods contribute to a larger architectural image and evolution. In order to establish the actual relations between architectural perspectives and words that support these, a chosen approach is to quote architects on issues considering architectural research endeavors. Similarly, underlying key points are elucidated with quotes that would communicate noteworthy aspects of adjacent theories.
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| 6. |
- Gohardani, Navid
(author)
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Architecture in effect : A glance at critical historiography
- 2014
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In: Archnet-IJAR. - : Emerald. - 1994-6961 .- 1938-7806. ; 8:1, s. 184-190
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Journal article (peer-reviewed)abstract
- Historiography marks a relatively unexplored research domain in architecture. Despite the obscure nature of this subject matter, architectural historiography equally illuminates a hidden pathway to the historical interaction of architecture with art or literature. Critical historiography adds another dimension to this emerging research topic that further encapsulates multiple levels of criticism. In recognition of a growing interest for historiography, it can be argued that the critical aspects of historiography may serve as crucial instruments for an enhanced understanding of architectural historiography. In this article, the realm of architectural historiography is investigated through a multidisciplinary perspective that revisits architectural criticism, critical historiography, modern architecture, phenomenology, and a number of aspects of architectural historiography in the Swedish Million Homes Program.
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| 8. |
- Gohardani, Navid, et al.
(author)
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Economic and Environmental Benefits Related to a Sustainable Building Refurbishment
- 2012
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In: BSA 2012 - Proceedings of the 1st International Conference on Building Sustainability Assessment. ; , s. 53-58
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Conference paper (peer-reviewed)abstract
- A case study on a multistory building is carried out with emphasis on sustainability and environmental impacts upon refurbishment, in comparison to the existing building performance. The study concerns a multistory building, established during the 1960s in Sweden, as an incentive of the Swedish government’s building strategy “The Million Unit Program”. In this article the difference in utilized insulation techniques in comparison to present building strategies is addressed with a simulation approach. In particular, results are presented for the estimated energy usage for heating calculated in conformity with EN ISO 13790 and based on a dynamic method for buildings prior to and after refurbishment with Vacuum Insulation Panels (VIP). The economic and environmental benefits of a potential refurbishment are further highlighted in relation to the existing building performance.
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| 11. |
- Gohardani, Navid
(author)
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Promotion of sustainable renovation in the built environment : An early stage techno-economic approach
- 2012
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Licentiate thesis (other academic/artistic)abstract
- According to the Swedish Government's set targets for energy use and environmental quality imposed by the European Union, the total energy per heated unit area in residential and commercial buildings will have to be decreased by 20% in 2020 and 50% by 2050 in relation to the annual consumption of 1995. The building sector should additionally be completely independent of fossil fuels for energy usage, with the increasing sector of renewable energy continuously growing until 2020. In its current state, the number of multistory buildings and single-family houses in Sweden exceeds 4 000 000 units. In order to attain the set goals, renovation of the existing housing stock is a necessity given its current relatively slow turnover. As a result of the Swedish Million Unit Program undertaken during 1965−1974, about 750 000 apartments are currently in need of renovation in order to meet today's building standards. Simultaneously, new buildings are built with energy efficiency in mind. In this study an early stage methodology is developed for building refurbishment that takes advantage of a multi-faceted approach. The methodology comprises of multiple dimensions related to a techno-economic, environmental and building occupancy approach. The work presented herein includes a thorough literature review of decision making tools within the built environment and identifies major research efforts in sustainable refurbishment. The technical aspect of this study deals with the proper identification of high-efficient insulation materials that would serve one of the set purposes of energy efficiency when utilized within building envelopes. Further, results are shown for case studies, in which economic investments in Vacuum Insulation Panels (VIPs) and a coupled heat and moisture transport for predefined configurations of VIPs with supplementary insulation of balcony slabs and wall cross-sections are considered. The developed methodology also examines simulations of the total energy consumption utilizing a set of different insulation materials such as mineral wool and VIPs, for a number of locations in Northern and Southern Europe. The research findings of this study identify several aspects of a new developed tool for decision making, to be used in sustainable renovation and refurbishment.
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| 12. |
- Gohardani, Navid, et al.
(author)
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Stakeholders and the Decision Making Process Concerning Sustainable Renovation and Refurbishment in Sweden, Denmark and Cyprus
- 2013
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In: Architecture & Environment. - : Sciknow Publications Ltd.. - 2329-2288. ; 1:2, s. 21-28
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Journal article (peer-reviewed)abstract
- This article examines the decision making process related to sustainable renovation and refurbishment in buildings. The utilized methodology identifies three distinct phases in order to instigate an engagement in sustainable renovation, by means of questionnaires and semi-structured interviews. In particular, the attitude of stakeholders in Sweden, Denmark and Cyprus to sustainable building renovation/refurbishment is studied through three separate case studies. Within the framework of this study, it is identified that building physics and durability are the most important drivers for energy renovation. In Sweden, Denmark and Cyprus, these factors are contributed by maintenance, deterioration and moisture, respectively. The results of the questionnaires and semi-structured interviews presented herein provide an insight into the renovation process in the aforementioned countries and reveal that economy is not the most important driver for energy renovation. Instead, the results signify that drivers such as improvement of indoor air quality and elimination of moisture in the building envelope are of crucial importance. Moreover, the practical implications of this research explore and identify existing instruments for sustainable renovation and refurbishment.
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| 13. |
- Gohardani, Navid, et al.
(author)
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Sustainable building renovation and refurbishment with applications of Vacuum Insulation Panels
- 2011
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In: SB11 World Sustainable Building Conference.
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Conference paper (peer-reviewed)abstract
- A large part of the available energy in the European Union is used for space heating of houses. This utilized energy presents an economical challenge as well as an environmental problem that ultimately must be dealt with by reducing the thermal losses through the climatic envelope. This reduction however, is intricate due to the spatial constraints in designated living areas and complexities arising from retrofitting of historical and cultural façades of the existing building stock. In light of the aforementioned problems, Vacuum Insulation Panels (VIP) may provide attractive solutions as they employ a thickness about one tenth of the required thickness, when using conventional insulation materials. This study contains a comparative analysis of VIP and traditional insulation materials and several other means of retrofitting in terms of life cycle energy and costs. Particular attention is given to the comparison of exterior and interior applications of VIP and the effects on the thermal bridges at the joints between the external wall and the adjacent floor slabs and balconies.
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| 14. |
- Gohardani, Navid, et al.
(author)
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Sustainable refurbishment in building technology
- 2012
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In: Smart and Sustainable Built Environment. - : Emerald Group Publishing Limited. - 2046-6099. ; 1:3, s. 241-252
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Journal article (peer-reviewed)abstract
- Purpose – The aim of this review article is to identify a number of key research efforts related to decision making tools in building refurbishment projects and selected energy efficiency efforts in the built environment. Following these findings a proposed research area with focus on energy in the building environment will be suggested for further investigation.Design/methodology/approach – Through a multilateral review study, a number of major research efforts in sustainable refurbishment are highlighted. The necessity of directing future research towards energy conservation is illustrated for a specific approach to developing the built environment.Findings – The findings of this article identify high performance thermal insulation solutions as one of the promising approaches to significant energy consumption reductions in buildings.Research limitations/implications – This review study is solely limited to the revisited research directions.Originality/value – This study successfully identifies a number of decision making tools related to building refurbishment and an initial research path in favor of building energy consumption reductions.
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| 15. |
- Gohardani, Navid, et al.
(author)
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Turning building renovation measures into energy saving opportunities
- 2015
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In: Structural Survey. - 0263-080X .- 1758-6844. ; 33:2, s. 133-149
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Journal article (peer-reviewed)abstract
- Purpose – The purpose of this paper is to promote energy saving measures concurrent with major planned renovation/refurbishment in residential buildings. Design/methodology/approach – The methodology comprises of case studies, in which the influence of various factors is identified on the overall decision making related to building renovation/refurbishment. Findings – The employed operational decision support process enables energy saving opportunities for residential buildings in conjunction with planned major renovations/refurbishments. Research limitations/implications – The research scope is confined to residential buildings in Sweden and cooperatives with tenants as the owners and governors. Practical implications – A novel approach to synergistic energy saving and renovation in residential buildings is exhibited. Social implications – The paper presents an altered viewpoint of energy renovation means for residential buildings in the built environment. Originality/value – The paper presents a novel approach for building owners to renovate a building in terms of improved performance, energy efficiency and indoor comfort in combination with planned renovations/refurbishments.
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