Energy and carbon emission payback analysis for energy-efficient retrofitting in buildings—Overhang shading option

Huang, Yu; Niu, Jianlei; Chung, TM

doi:10.1016/j.enbuild.2011.10.027

Cited by 81 publications

(33 citation statements)

References 22 publications

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“…Iwan in an ideal form which is located in the south-facing, depending on its climate, approximately reduces between 14% and 32% of the building's energy consumption. Compared with the results of the research in the introduction [44][45][46][47], Different reductions for building thermal loads are mentioned, which range between 7% and 35%. The conclusions of this research paper are summarized as follows:…”

Section: Discussionmentioning

confidence: 99%

“…and its impact on reducing building energy consumption. Besides, the shadings span usually is more focused on building openings [35][36][37][38][39][40][41][42][43][44][45][46][47]. As respects in this study, Iwan as an integrated shading system that covers both the wall and the building's openings, moreover, as a semi-space in Islamic architecture with various forms, dimensions and directions have been analyzed for the first time and eventually, to what extent, the traditional architects have been able to apply climatic efficiency design to Iwan element in buildings.…”

Section: Introductionmentioning

confidence: 99%

“…The results, which were conducted for south-facing private offices, showed that EC windows with overhangs can significantly reduce the annual energy use savings if the window area is large. For example, electric demand can be decreased by 7-8% for moderate-area windows and by 14-16% for large-area windows [44].…”

Section: Introductionmentioning

confidence: 99%

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The Impact of Iwan as a Traditional Shading Device on the Building Energy Consumption

2017

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In this paper, the effect of an exterior shading element (Iwan) on energy consumption in four different climatic regions and for different orientations, has been investigated numerically and experimentally. By applying different materials and techniques and creating various elements and spaces, architects make hard climatic conditions more tolerable for residents. Iwan is one of the cooling elements which is used in different forms and dimensions in the Islamic architecture. In the present research, Iwan has been introduced as a climatic element in traditional and contemporary architectures and its role in reducing the energy consumption in buildings has been studied. In this respect, first, the thermal loads of a building without Iwan are computed using the EnergyPlus software. Then, four different forms of Iwan are added to the above-mentioned structure along the four principal orientations, moreover, the effect of Iwan on the reduction of thermal loads is analyzed for four different climates. Finally, the design parameters of Iwan, in terms of depth and form, which can help reduce the thermal loads in different climatic conditions are presented. The results show that the best position for using an Iwan is the south direction and the use of Iwan in temperate & humid, hot & humid, cold & mountainous and hot & dry climates could reduce the energy consumption in buildings by 32%, 26%, 14% and 29%, respectively.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Impact of Iwan as a Traditional Shading Device on the Building Energy Consumption

2017

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“…This affects energy savings in old buildings thus attempts should be made to improve payback time [74]. This is important because unacceptable long payback periods make it difficult to recover the economic investment as well [75]. There is the perception that energy efficiency improvements do not achieve estimated energy savings.…”

Section: Discussionmentioning

confidence: 99%

Barriers to Adoption of Sustainable Technologies for Energy-Efficient Building Upgrade—Semi-Structured Interviews

et al. 2018

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Abstract:Globally, only 2% of existing building stock is built yearly; the remaining 98% already exist. Energy consumption and indoor thermal comfort of the existing building stock are not encouraging. This is due to many challenges associated with existing buildings; the challenges range from cracks, leakages, poor insulation, heat losses and high rate of unsustainable technologies. This paper investigates possible barriers facing the adoption and application of sustainable technologies (STs) for sustainable or energy-efficient upgrade of existing buildings. New STs are manufactured on a regular basis to meet improved energy efficiency standards, yet there are minimal actions/attempts to adopt and apply improved technologies in existing buildings for energy efficiency. Indeed, there are limited studies focused on the use of qualitative approaches to identify barriers to adoption and use of STs. Thus, a semi-structured interview approach was adopted and applied using sustainability/energy efficiency professionals, building services engineers, project managers, architects, and facility managers in Australia. The results indicate that barriers to the adoption and application of sustainable technologies are perceived benefits in demolish-and-build, age of building, cost of STs, perceived poor payback time, unreliable energy-savings projections, existing design, hidden and overall cost of renovation, and cost of STs.

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“…Through the calculation method proposed by Keller, the relationship between solar heat gain and energy consuming can be drawn [9]. Furthermore, we should pay attention to whether sunshade structure excessively consumes energy or produces CO2 [10].…”

Section: Introductionmentioning

confidence: 99%

Design of Sunshade Board with South External Window of Residential Building in Hangzhou Based on Software Simulation Analysis of Energy Saving

Xu¹

2015

IJSH

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Energy and carbon emission payback analysis for energy-efficient retrofitting in buildings—Overhang shading option

Cited by 81 publications

References 22 publications

The Impact of Iwan as a Traditional Shading Device on the Building Energy Consumption

The Impact of Iwan as a Traditional Shading Device on the Building Energy Consumption

Barriers to Adoption of Sustainable Technologies for Energy-Efficient Building Upgrade—Semi-Structured Interviews

Design of Sunshade Board with South External Window of Residential Building in Hangzhou Based on Software Simulation Analysis of Energy Saving

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