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GREEN FACADES IN ARID CLIMATE: EFFECTS ON BUILDING ENERGY CONSUMPTION IN JEDDAH, SAUDI ARABIA
Title
GREEN FACADES IN ARID CLIMATE: EFFECTS ON BUILDING ENERGY CONSUMPTION IN JEDDAH, SAUDI ARABIA
Creator
Binabid, Jamil
Date
2017, 2017-05
Description
In recent decades, the population of Saudi Arabia has increased significantly, reaching thirty-two million in July 2016. This proliferation of...
Show moreIn recent decades, the population of Saudi Arabia has increased significantly, reaching thirty-two million in July 2016. This proliferation of residents, along with substantial economic growth, has precipitated the construction of numerous new buildings, particularly residential structures. Consequently, post-1940, with the introduction of subdivisions and setbacks, more surfaces were exposed to solar radiation, leading to rising levels of surface heat. With the growing use of air conditioning since the early 1970’s, electrical energy consumption increased, exacerbated by the poor performance of building envelopes, the common use of concrete blocks for construction and, as reported in 2013 by the Saudi Electricity Company, the fact that 70% of buildings are not thermally insulated, all of which contributes to high cooling loads and the increased use of air-conditioning to provide building occupants with the desired level of thermal comfort. In response to this trend, the Saudi government established the Saudi Energy Efficiency Center (“SEEC’) in 2014, requiring that all new construction must have insulation. This policy did not, however, address the study of existing buildings in order to adopt appropriate energy-efficiency solutions. Green facades present an important and efficacious approach to meeting this need. The following research focuses on green facade design strategies, which in conjunction with thermal insulation retrofitting can significantly enhance building envelope performance on existing low-rise (one to three floors) single-family home structures in the arid climate of Jeddah, the second largest city in Saudi Arabia, located in the western area in the most populated province of Mekkah. The city was selected as a case study because the residences require cooling and air-conditioning almost all year round due to low diurnal temperature variation resulting from low elevation and high humidity. Research methods included an experimental approach to understand how much solar radiation is blocked through green façade. After researching both native and nonnative plants, as well as certain vegetation properties provided from previous literature resembling evapotranspiration and thermal conductivity, Bougainvillea Glabra, Clerodendrum Inerme, Ipomoea Pes-Caprae, Jacquemontia Pentantha, and Pentalinon Luteum were chosen as the optimal plants for use in this study. Data collected from existing green façades in Jeddah during the summer season were analyzed for comparison and evaluation. In addition, energy simulation by Energy Plus was used to predict potential cooling and air-conditioning energy savings for buildings in Jeddah in respect to the differences between the types of plants and green façade systems used. Finally, the recommendations on the best design solutions for arid climate of Jeddah will be formulated and could be incorporated into the city policies and regulations from SEEC and the Municipality.
Ph.D. in Architecture, May 2017
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The Feasibility of Honeycomb Structure to Enhance Daylighting and Energy Performance for High-Rise Buildings
Title
The Feasibility of Honeycomb Structure to Enhance Daylighting and Energy Performance for High-Rise Buildings
Creator
Geng, Camelia Mina
Date
2022
Description
The world population is increasing at a fast rate and the projection is that there will be more than 12 billion people by the year 2050. It is...
Show moreThe world population is increasing at a fast rate and the projection is that there will be more than 12 billion people by the year 2050. It is also expected that at least 70% of the population will reside and work in urban areas (mostly cities) in some sort of high-rise building. At the same time, the climate is rapidly changing to increase the effects of man-made global warming. Conceivably, energy conservation, daylighting performance, thermal comfort and environmentally friendly high-rise buildings are necessary to facilitate sustainable working and living environments. The roles of the architects and planners are paramount at this critical era of history of mankind; for one thing they are responsible for the planning and design of sustainable high-rise buildings.Recently, there has been significant research to connect a branch of Biophilia design, which is Biomorphic architecture. This has developed a wonderful design approach, termed the Biomorphic idea. This focuses on the enhancement of the physical and psychological connection with nature, to acquire more natural light and the outside connection targeting energy saving. More and more, high-rise buildings are being designed following Biomorphic approaches. As such, these buildings are defined as sustainable and primarily, because they are energy efficient and, and in many cases tend to minimize the use of fossil fuels while promoting the use of renewable and clean energy sources. As such, a honeycomb structure approach successfully applies to high-rise building design. The intend of this research document is to simulate Biomorphic honeycomb structure which is the hexagonal rotation ring structure including 32 stories in18 different hexagon high-rise building configurations, to develop true daylighting and energy. performance. This is achieved by the using Grasshopper-Climate Studio simulation tool and multiple fuzzy mathematics for decision making. This document will provide a comparison of daylighting including sDA, ASE, sDG and the illuminance results from these 3 series of the 18 models configuring different honeycomb structures of high-rise buildings. The results prove that the hexagon honeycomb structure for high-rise building is feasibility and targets green buildings standards such as LEED V4.1 The success of the method depends on developing multiple criteria of Poisson ratio and Gaussian curvature within the hexagon structure to create different honeycomb facades and rotation of the ring for office high-rise building which is also a qualitative nature of the Biomorphic design parameters.
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