Effect of semi-transparent a-Si PV glazing within double-skin façades on visual and energy performances under the UK climate condition

Roberts, Frank; Yang, Siliang; Du, Hu; Yang, Rebecca

doi:10.1016/j.renene.2023.03.023

Cited by 23 publications

(5 citation statements)

References 25 publications

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“…The building skin plays a very important role in influencing the energy consumption of the building, and a green and energy-saving building skin design can significantly reduce the energy consumption of the building. At this level, to reduce the energy consumption of office buildings, most domestic and foreign scholars have studied shading louvers [3][4][5][6][7][8], double-skin façades [9,10], glazing types [11], fixed and dynamic shading forms [12][13][14][15][16][17][18][19], and shading films [20]. Among them, scholars have studied the two aspects of shading louvers and fixed and dynamic shading forms.…”

Section: At the Building Skin Levelmentioning

confidence: 99%

Energy Performance Analysis and Study of an Office Building in an Extremely Hot and Cold Region

Liu,

Wang,

Huang

et al. 2024

Sustainability

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China is committed to reaching peak carbon by 2030 and carbon neutrality by 2060. The goals of reducing energy consumption and building a “beautiful China” are being urgently pursued in China. The building studied in this paper is located in the city of Turpan, where the problem of excessive energy use among buildings is significant due to the region’s hot summers and cold winters. Additionally, the fact that the office building studied in this paper has an east–west orientation is significant: the building’s main façade is oriented to the west, comprising a large area of single-layer glass curtain wall. Based on this, this paper proposes optimization strategies from two perspectives of renovation and new construction. Four design options are proposed at the retrofit level: glazed circular curtain wall; glazed enclosed curtain wall; west-facing double-glazed curtain wall circulation combined with south-facing light from the east; recycling of windows on the inside of the exterior glass curtain wall. These suggestions focus on retrofitting the glass curtain wall on the west elevation of the building. Two design options are proposed at the new-build level: west-facing south-oriented light and west-facing north-oriented light. These suggestions were primarily built around the idea of changing the orientation of the windows on the west elevation. The results show that the optimal solution is to implement the west-facing double-glazed curtain wall circulation combined with south-facing light from the east. This program shows a 64.14% reduction in heating energy consumption, a 77.12% reduction in cooling energy consumption, and a 69.67% reduction in total energy consumption. The above research has improved the deficiencies in the performance-based energy efficiency retrofit of office buildings in the region and provided new ideas and suggestions for policymakers and designers to build energy-efficiency retrofits in the early stages.

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Section: At the Building Skin Levelmentioning

confidence: 99%

Energy Performance Analysis and Study of an Office Building in an Extremely Hot and Cold Region

Liu,

Wang,

Huang

et al. 2024

Sustainability

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“…This means that their energy savings are not necessarily superior to conventional non-capacity building envelopes in areas that are in extreme heat or cold throughout the year. As an example, Roberts et al [53] and Jhumka et al [54] indicate that the application of BIPV façades in London (51 • N) and Mauritius (20 • S) may result in an increase in energy consumption in the range of 1.66% to 8.00%. In other words, for extremely hot climate zones, PV glazing with a large PV coverage ratio can lead to less heat gain and more power generation.…”

Section: Summary: Limitations and Solutions Of Bipv Façadesmentioning

confidence: 99%

“…Figure 4. Comparison of annual energy saving ratios of three BIPV façades in different locations at different latitudes[33,35,39,48,[53][54][55][56][57].…”

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confidence: 99%

Challenges and Optimization of Building-Integrated Photovoltaics (BIPV) Windows: A Review

Shi,

Zhu

2023

Sustainability

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PV windows are seen as potential candidates for conventional windows. Improving the comprehensive performance of PV windows in terms of electrical, optical, and heat transfer has received increasing attention. This paper reviews the development of BIPV façade technologies and summarizes the related experimental and simulation studies. Based on the results of the literature research, the average comprehensive energy-saving rate of BIPV façades can reach 37.18%. Furthermore, limitations and optimization directions of photovoltaic integrated shading devices (PVSDs), photovoltaic double-skin façades, and photovoltaic windows are presented. To improve the energy-saving potential of windows as non-energy efficiency elements of buildings, smart PV windows are proposed to be the key to breakthrough comprehensive performance. However, not all switchable windows concepts can be applied to PV windows. Typical studies on smart windows and PV windows are sorted out to summarize the challenges and optimization of smart PV window technical solutions. Considering the technological innovations in smart PV windows, two requirements of energy-saving materials and building envelopes are put forward. The advances in materials and the building envelope are complementary, which will promote the sophistication and promotion of solar building technology.

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“…Humans would historically spend 90% of their time exposed to direct daylight, whereas the modern human is typically only exposed 10% of the time [4]. Within a short period of time, humans have become heavily exposed to indoor artificial lighting sources [5]. Consequently, this has led to a risk of breast cancer, metabolic disorders, and behavioural disorders [6].…”

Section: Introductionmentioning

confidence: 99%

The Application of Human-Centric Lighting in Response to Working from Home Post-COVID-19

Roberts,

White,

Memon

et al. 2023

Buildings

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COVID-19 has caused a considerable proportion of the public to work from home, either part- or full-time, in unregulated domestic conditions, which have not been designed for commercial activities. This study determined what existing lighting conditions were present in a selection of work-from-home (WFH) environments (Objective One) through quantitative lux level and equivalent melanopic lux (EML) readings by evaluating them against regulatory standards, where further study is required to validate the results with a larger dataset. This study also investigated the social demand for human-centric lighting (HCL) installations within WFH environments (Objective Two) through qualitative questionnaires by considering key parameters: sustainability, practicality, and cost. The results of Objective One showed that compliance with general safety lighting requirements was achieved by 80% of the installations. The mean lux level recorded was 452.4 lux and 0.729 uniformity, which fell below commercial requirements defined for commonly performed WFH activities; 34.3% of recorded EML dropped below the regulatory requirements under daylight conditions. When isolated to artificial lighting, only 7.5% of the required EML was achieved. The results of Objective Two showed that generally participants did not feel that their WFH installations were unsuitably lit, however, 46.2% of participants identified noticeable headaches or eye strain when working from home. A total of 80% of participants highlighted that HCL task lighting would be preferable. It was also found that participants were willing to invest in circadian lighting for health, where 63.2% of them would not accept a reduction in efficiency of over 10% compared to non HCL. Wellbeing was found to be participants’ key preference for their lighting systems, followed by efficiency, home impact, and cost.

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Effect of semi-transparent a-Si PV glazing within double-skin façades on visual and energy performances under the UK climate condition

Cited by 23 publications

References 25 publications

Energy Performance Analysis and Study of an Office Building in an Extremely Hot and Cold Region

Energy Performance Analysis and Study of an Office Building in an Extremely Hot and Cold Region

Challenges and Optimization of Building-Integrated Photovoltaics (BIPV) Windows: A Review

The Application of Human-Centric Lighting in Response to Working from Home Post-COVID-19

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