Browsing by Author "Shawky Saifelnasr, Shady"

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A Design Chart to Determine the Overall Thermal Resistance of a Building Envelope Cross-Section
(October university for modern sciences and Arts MSA, 2023) Shawky Saifelnasr, Shady
The overall thermal resistance of a building envelope cross-section; vertical or horizontal, is crucial for providing insulation for indoor spaces to reduce heat transmission, which would lower energy usage. The main objective of this paper is to create a design chart that determines the overall thermal resistance of vertical or horizontal cross-sections that constitute a building envelope. Additionally, it can determine the appropriate insulation needed to achieve the desired overall thermal resistance. The design chart is made up of several integrated graphs that are created using various formulas, with each graph illustrating the resistance of a particular building material as a function of its thickness. Using the design chart to determine the overall thermal resistance of vertical or horizontal cross-sections is simple for architects to do without having to perform several calculations. It is also universal since it may satisfy the needs of the various energy regulations across the globe.
A Design Chart to Determine the Sizing of Vertical Windows for Daylighting
(Springer, 02/12/2020) Shawky Saifelnasr, Shady
The main objective of this paper is to introduce a simple quick tool for architects represented by a design chart that determines the sizing of vertical windows for providing minimum or average amount of daylight as a function of the properties of the window, the room, and the surrounding environment. One of the most important purposes for introducing windows to a building envelope is providing adequate daylight suitable for the different uses within the different functional spaces. And daylighting might be one of the main reasons for the sizing of those windows. Different calculation methods could be used for daylight calculation and analysis; formula methods, graphical methods, scale models, and computer programs. Although formula methods are not the most accurate daylighting calculation method, they could be used as a rule of thumb especially within the preliminary stages of design. The proposed design charts are derived from formula methods to be used by architects as a simple quick tool that could be used for both design and analysis. They could be used within the design process by finding the sizing of vertical windows. Moreover, they could be used in the analysis of an existing case by finding the available daylight factor. The design charts are a combination of more than one graph to include most of the specifications of the window, the room, and the surrounding environment, to find the sizing of vertical windows, that would ensure the minimum or average amount of daylight for any city all over the world, within the low, middle, or high latitudes.