Improved thermal-electrical-optical model and performance assessment of a PV-blind embedded glazing façade system with complex shading effects

Luo, Yongqiang; Zhang, Ling; Su, Xiaosong; Liu, Zhongbing; Lian, Jinbu; Luo, Yongwei

doi:10.1016/j.apenergy.2019.113896

Cited by 18 publications

(5 citation statements)

References 48 publications

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“…The simulated perimeter office is 5 m deep, 4.5 m wide, and 3.2 m high (Fig 4) with a 65% window-to-wall ratio. These dimensions are similar to those found in previous daylighting studies [45,46]. The window is 2.2 m high (h w ) and 4 m wide (w w ); it sits at 0.5 m from the ground (Fig 3).…”

Section: Façade Orientation and Room Geometrysupporting

confidence: 86%

Occupant-centered optimization framework to evaluate and design new dynamic shading typologies

et al. 2020

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Dynamic solar shading has the potential to dramatically reduce the energy consumption in buildings while at the same time improving the thermal and visual comfort of its occupants. Many new typologies of shading systems that have appeared recently, but it is difficult to compare those new systems to existing typologies due to control algorithm being rule-based as opposed to performance driven. Since solar shading is a design problem, there is no single right answer. What is the metric to determine if a system has reached its optimal kinematic design? Shading solutions should come from a thorough iterative and comparative process. This paper provides an original and flexible framework for the design and performance optimization of dynamic shading systems based on interpolation of simulations and global minimization. The methodology departs from existing rule-based strategies and applies to existing and to complex shading systems with multiple degree-of-freedom mobility. The strategy for control is centered on meeting comfort targets for work plane illuminance while minimizing the energy needed to operate space. The energy demand for thermal comfort and work plane daylight quantity (illuminance) are evaluated with Radiance and EnergyPlus based on local weather data. Applied to a case study of three typologies of dynamic shading, the results of the methodology inform the usefulness and quality of each degree-of-freedom of the kinematic systems. The case study exemplifies the iterative benefits of the methodology by providing detailed analytics on the behavior of the shades. Designers of shading systems can use this framework to evaluate their design and compare them to existing shading systems. This allows creativity to be guided so that eventually building occupants benefit from the innovation in the field.

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Section: Façade Orientation and Room Geometrysupporting

confidence: 86%

Occupant-centered optimization framework to evaluate and design new dynamic shading typologies

et al. 2020

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“…The power generation of PV blinds is affected by façade orientation and blind arrangement [61]. The architectural component is an influential aspect in the design of dynamic solar shading; it not only improves the aesthetic and cultural values of building façades but also further enhances their performance.…”

Section: Type Of Technologymentioning

confidence: 99%

“…Indeed, a greater distance corresponds with a lower energy generation due to reduced solar radiation. A small blind spacing and a large blind width would result in less solar transmission, decreasing the cooling load in summer [53,61]. The same blind configuration increases the power production by 71% compared to systems with large blind spacing and small width.…”

Section: Design Strategiesmentioning

confidence: 99%

Paper Review of External Integrated Systems as Photovoltaic Shading Devices

2023

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The building sector contributes to 40% of the total final energy consumption and 36% of CO2 emissions in Europe, and these are set to increase in the coming years. International directives are pushing towards a decarbonisation roadmap to improve the quality of cities and the health of citizens. Buildings have a potentially central role in terms of energy transition as a means to produce and save energy. Photovoltaic shading devices (PVSDs) protect buildings from direct solar radiation and overheating while producing renewable electricity onsite and increasing the users’ thermal comfort. Even though the potential of the PVSD is considerable, the sector is still unexplored, and few studies on the topic are available in the literature. This systematic review aims to present an exhaustive overview of the current literature on state-of-the-art PVSDs by analysing the scientific framework in terms of the status of the research. It presents a performance-based approach focusing on innovative products, PVSD design strategies, and energetic performance in distinct climate conditions and configurations. In particular, 75 articles and about 250 keywords were identified, selected, and analysed. The literature review serves as a basis for further R&D activities led by both the industrial and the academic sectors.

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“…and Kang et al, addressed the issue of PV blinds. The first team addressed multilayer glazing facades using shading blinds, and validated simulated results with experimental data [20][21][22]. The other team worked similarly (comparing simulation and experimental data) on sun-tracking methods for intelligent photovoltaic blinds [23].…”

Section: Literature Review: Standard Blinds and Pv Blinds In Different Scenariosmentioning

confidence: 99%

Optimization of Useful Daylight Illuminance for Vertical Shading Fins Covered by Photovoltaic Panels for a Case Study of an Office Room in the City of Wroclaw, Poland

2021

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A building’s facade is its main interface with the external environment, as it controls almost all energy flows in the building—losses and gains. In this context, the most recent invention of adaptive façades allows for the introduction of an optimized system for both daylight management and electrical energy production. The authors of the presented paper propose a novel adaptive façade system that is equipped with vertical shading fins of 1 × 4 m that are covered with PV panels. The fins are kinetic and rotate around a vertical axis in order to optimize solar irradiation for producing electricity. The presented adaptive façade is analyzed in two stages. Firstly, the number of vertical shading fins is optimized in the context of useful daylight illuminance (UDI) and daylight glare probability (DGP) using Radiance-cored software. Next, two scenarios of PV installation are verified for fixed and the Sun-tracking solution. The results show that the Sun-tracking system is more efficient than the fixed one, but electricity production is only increased by 3.21%. The reason for this is the fact that—while following the Sun’s azimuth position—fins shade each other and reduce the effective area of the adjacent PV panels. Based on this, the authors conclude that the Sun-tracking system might be justified due to its protective or decorative function and not because of its improved effectiveness in generating electrical energy.

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Improved thermal-electrical-optical model and performance assessment of a PV-blind embedded glazing façade system with complex shading effects

Cited by 18 publications

References 48 publications

Occupant-centered optimization framework to evaluate and design new dynamic shading typologies

Occupant-centered optimization framework to evaluate and design new dynamic shading typologies

Paper Review of External Integrated Systems as Photovoltaic Shading Devices

Optimization of Useful Daylight Illuminance for Vertical Shading Fins Covered by Photovoltaic Panels for a Case Study of an Office Room in the City of Wroclaw, Poland

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