- AutorIn
- Eman Hirzallah Technische Universität Dresden
- Titel
- Evaluating Photocatalytic Kinetic Shading Devices for Residential Building Facades: A Case Study of Abu Dhabi, UAE
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa2-1017576
- Erstveröffentlichung
- 2026
- Datum der Einreichung
- 19.01.2026
- Datum der Verteidigung
- 18.12.2025
- Abstract (EN)
- This thesis presents a novel, multi-phase methodology for the design, simulation, and evaluation of Photocatalytic Kinetic Shading Devices (PKSDs)—a new façade typology that combines dynamic solar control, passive air purification via photocatalysis, and a multi-scale, design-to-evidence workflow. Tailored for hot-arid urban environments, the framework integrates biomimetic inspiration, parametric modeling, performance optimization, environmental simulation, and mechanical prototyping—culminating in a fully operational prototype. This research presents a unique approach that integrates all three domains within a single, validated design process. PKSDs directly address a coupled urban challenge prevalent in hot-arid cities: overheating, high cooling demand, and Nitrogen Oxides (NOₓ) pollution from traffic tend to peak simultaneously. The PKSD is designed to mitigate all three—by modulating solar gain, reducing indoor operative temperatures, and promoting photocatalytic NOₓ breakdown—thereby offering a multifunctional solution for climate-responsive design. Inspired by plant tropisms and leaf morphologies, the PKSD was parametrically developed to track solar geometry through vertical and horizontal motion. Early-stage environmental matrices guided the selection of a uniformly folding configuration optimized for performance and mechanical simplicity. The system was evaluated at multiple spatial scales using an integrated workflow (Rhino, Grasshopper, Ladybug, ENVI-met). At the urban scale, ENVI-met simulations showed up to 44% NOₓ reduction in high-traffic zones of Abu Dhabi under high-UV, low-wind conditions. At the building scale, daylight factors (DF) dropped from ~9.3–10.4% to ~3.0–3.4% (vertical mode) and ~1.4–1.6% (horizontal mode), while operative temperatures (OT) were reduced by up to ~6 °C at critical times, with daily averages improving by 2.5–3.0 °C. These effects closely followed solar incidence, confirming the system’s responsiveness. However, the overlap of optimal thermal and photocatalytic performance with daylight reduction revealed key trade-offs—highlighting the need for balanced control strategies. A dual-axis prototype was fabricated and validated under real-world conditions, demonstrating structural reliability and actuation precision. The core contributions of this research are: (1) a transferable multi-scale framework linking early design inputs to building-scale performance and urban microclimate outcomes, (2) a multifunctional kinetic façade typology that provides solar control and passive NOₓ depollution in a coordinated system, (3) a validated prototype with implementation guidance—defining when and where PKSDs are most effective based on climatic and urban conditions.
- Freie Schlagwörter (DE)
- Photokatalyse, Kinetische Verschattungssysteme, Adaptive Fassaden, Nachhaltige Architektur, Heiß-arides Klima
- Freie Schlagwörter (EN)
- Photocatalysis, Kinetic shading devices, Adaptive facades, Sustainable architecture, Hot-arid climate
- Klassifikation (DDC)
- 624
- Klassifikation (RVK)
- ZH 3070
- GutachterIn
- Prof. Dr. Peggy Freudenberg
- Dr. Deyala Al Tarawneh
- BetreuerIn Hochschule / Universität
- Prof. Dr. Peggy Freudenberg
- BetreuerIn - externe Einrichtung
- Dr. Deyala Al Tarawneh
- Den akademischen Grad verleihende / prüfende Institution
- Technische Universität Dresden, Dresden
- Version / Begutachtungsstatus
- publizierte Version / Verlagsversion
- URN Qucosa
- urn:nbn:de:bsz:14-qucosa2-1017576
- Veröffentlichungsdatum Qucosa
- 23.01.2026
- Dokumenttyp
- Dissertation
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis
CC BY 4.0- Inhaltsverzeichnis
TABLE OF CONTENTS 1 CHAPTER ONE: INTRODUCTION 1.1 Research Background 1.2 Research Gap 1.3 Research Aim and Objectives 1.4 Research question 1.5 Research Scope and Limitations 1.6 Research Structure 2 CHAPTER TWO: LITERATURE REVIEW 2.1 Introduction 2.2 Theoretical Foundations of Photocatalysis in Architecture 2.2.1 Background and Architectural Relevance 2.2.2 Air Pollution Problem and Mitigation Strategies 2.2.3 Photocatalytic Mechanism and Active Materials 2.2.4 Environmental Factors, Functional Applications, and Evaluation Methods 2.2.5 Architectural Applications and Case Studies 2.2.6 Limitations and Performance Constraints of Photocatalytic Materials 2.3 Kinetic Shading Systems: Typologies and Environmental Relevance 2.3.1 Conceptual Overview and Definitions of Adaptive Façade Systems 2.3.2 Typologies of Adaptive Façades 2.3.3 Biomimicry Approaches in KSSs 2.3.4 Environmental Performance: Benefits and Limitations of KSDs 2.3.5 Design Strategies for KSSs 2.3.6 Architectural Case Study of Adaptive Shading Systems 2.3.7 Performance Assessment Criteria in KSSs 2.4 Integration of Photocatalysis in Kinetic Shading Devices 2.5 Conclusion 3 CHAPTER THREE: CASE STUDY ANALYSIS-ABU DHABI CONTEXT 3.1 Feasibility of PKSDs in Abu Dhabi 3.1.1 Geographic and Climatic Characteristics of Abu Dhabi 3.1.2 Air Pollution in Abu Dhabi 3.1.3 Residential Façade Systems in Abu Dhabi: Typologies and Challenges 3.1.4 Environmental Compatibility of PKSDs in Abu Dhabi 3.2 Environmental and Urban Context of Selected Case Study Sites in Abu Dhabi 3.2.1 Hamdan Street, Abu Dhabi City Center – Site 01 3.2.2 Residential Building in Al Raha Beach – Site 02 3.3 Conclusion 4 CHAPTER FOUR: RESEARCH METHODOLOGY FOR PKSD DEVELOPMENT 4.1 Tool Features and Selection Rationale 4.1.1 Tool Description and Selection 4.1.2 Applied Criteria and Boundary Conditions 4.2 Interconnections and Data Workflow 4.3 Tool Limitations and Mitigation Strategies 4.4 Input Data Requirements 4.5 Performance Evaluation Criteria 4.6 Conclusion 5 CHAPTER FIVE: DESIGN AND DEVELOPMENT OF PKSD 5.1 Performance-Oriented Design Parameters 5.2 Biomimetic Design Development 5.3 Evaluation Framework for Design Typologies: Form, Section, and Motion 5.3.1 Design Typologies and Form-Based Strategies 5.3.2 Comparative Evaluation of Design-to-Performance Configurations 5.4 Parametric Optimization Framework 5.4.1 Remaining Degrees of Freedom (DoF) 5.4.2 Optimization Tools and Methods 5.5 Digital Modeling and Simulation Technical Workflow 5.6 Conclusion 6 CHAPTER SIX: PERFORMANCE EVALUATION OF PKSDs 6.1 Application Setup & Scenario Definition 6.2 Daylight and Thermal Comfort Analysis 6.2.1 Simulation Process and Configuration for Daylight and Thermal Comfort Analysis 6.3 Assessment of Photocatalytic Efficiency at the Building and Urban Scales 6.3.1 Simulation Process and Configuration 6.4 Conclusion 7 CHAPTER SEVEN: EXPERIMENTAL VALIDATION AND MECHANICAL TESTING OF THE PKSD 7.1 Minimum Requirements Definitions 7.2 Conceptual Sketches for Mechanical Development 7.3 Proof of Concept Development Phases 7.4 Reflections on Materials, Folding, and Assembly 7.5 Conclusion 8 CHAPTER EIGHT: RESULTS AND DISCUSSION 8.1 Impact on Daylight and Thermal Comfort and Optimal Shading Orientation 8.1.1 Daylight Performance Analysis 8.1.2 Thermal Comfort Analysis 8.1.3 Optimal Shading Orientation 8.2 Environmental Factors Affecting Photocatalytic Efficiency 8.3 Practical and Structural Applicability 8.4 Critical Reflection and Limitations 8.5 Design-Process Takeaways 9 CHAPTER NINE: CONCLUSIONS AND FUTURE RECOMMENDATION 9.1 Scientific Contributions and Transferability 9.2 Design and Toolchain Recommendations 9.3 Future Outlook and Research Directions 9.4 Final Remark 10 REFERENCES 11 APPENDIX