Session: 4.1.3 - Renewable Energy Systems
Paper Number: 118960
118960 - Window and Shading Design for Office Buildings in Humid Subtropical Climate: An Energy Efficient Solution for New and Existing Buildings
Windows and their control elements, such as shadings, are the most critical building components affecting energy consumption and occupant comfort. This study investigated the impact of window systems and shading design for office buildings in the Cleveland, zone Dfa category in the Köppen climate classification to improve building energy efficiency and occupant comfort. A fixed shading system is chosen for this study regarding its more cost-effective than dynamic shadings, although the latter may result in better outcomes. The variables are WWR, window sill height, and louver shading configurations, including material, slat angle, depth, and the number of slats. The novelty of this study indicated analyzing and comparing two scenarios for the studied office: Scenario 1 consists of two windows located on the north and south facade, and Scenario 2 consists of two windows on the east and west with independent shading parameters. The NSGA-II algorithm is applied for multi-objective optimization, and optimum models are selected with the Preto Frontier approach. Three different analyses are done to find the relationship between window and shading systems with energy efficiency and occupant comfort for new and existing buildings, including the impact of WWR and window location without any shadings on the objectives, the simultaneous consideration of both window system and shading design, and finally, the shading device with a fixed window. The first two analysis is applicable to new buildings and beneficial for the architects, and the third one is a cost-effective and energy-efficient solution for the existing buildings.
Windows and their control elements, such as shadings, are the most critical building components affecting energy consumption and occupant comfort. This study investigated the impact of window systems and shading design for office buildings in the Cleveland, zone Dfa category in the Köppen climate classification to improve building energy efficiency and occupant comfort. A fixed shading system is chosen for this study regarding its more cost-effective than dynamic shadings, although the latter may result in better outcomes. The variables are WWR, window sill height, and louver shading configurations, including material, slat angle, depth, and the number of slats. The novelty of this study indicated analyzing and comparing two scenarios for the studied office: Scenario 1 consists of two windows located on the north and south facade, and Scenario 2 consists of two windows on the east and west with independent shading parameters. The NSGA-II algorithm is applied for multi-objective optimization, and optimum models are selected with the Preto Frontier approach. Three different analyses are done to find the relationship between window and shading systems with energy efficiency and occupant comfort for new and existing buildings, including the impact of WWR and window location without any shadings on the objectives, the simultaneous consideration of both window system and shading design, and finally, the shading device with a fixed window. The first two analysis is applicable to new buildings and beneficial for the architects, and the third one is a cost-effective and energy-efficient solution for the existing buildings.
Presenting Author: Sarah Nazari School of Mechanical Engineering, College of Engineering, University of Tehran
Presenting Author Biography: Sarah has an MSc in Energy and Architectural Engineering.
Window and Shading Design for Office Buildings in Humid Subtropical Climate: An Energy Efficient Solution for New and Existing Buildings
Paper Type
Technical Paper Publication (Iran)