دور أدوات نمذجة طاقة المباني (BEM) في رفع كفاءة الغلاف الخارجي دراسة حالة مبنى تعليمي قائم | ||||
| Engineering Research Journal | ||||
| Volume 179, Issue 0, September 2023, Page 75-99 PDF (1.62 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/erj.2023.315909 | ||||
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| Authors | ||||
| أيمن سمير محمود* 1; نسرين فتحي عبد السلام2; ابتهال جلال الدين محمد2 | ||||
| 1مدرس مساعد بقسم الهندسة المعمارية بالمعهد العالي للهندسة والتكنولوجيا بالعبور، الكيلو21 طريق القاهرة aymans@oi.edu.eg .مصر، العبور | ||||
| 2أستاذ مساعد بقسم الهندسة المعمارية، كلية الهندسة المعمارية بالمطرية، جامعة حلوان. | ||||
| Abstract | ||||
| Using energy in heating and cooling has become increasingly important worldwide to gain thermal comfort inside buildings, as rising temperatures in hot countries can cause discomfort to individuals, and impact their productivity negatively, causing increased dependence on AC, which raises up the energy quirements for buildings due to increasing AC hours of operation. In nonresidential buildings, AC systems consume majority of the buildings’ energy budget to meet required thermal comfort (1) . Consequently, simulations became an important tool to improve buildings’ environmental performance, where designers use dynamic simulation operations to improve non-renewable energy use and minimize harmful environmental impacting factors like greenhouse gases, mainly CO2 which represents a 66% ratio (1) , This study’s focus is proving the positive role of energy simulations in conserving energy and improving eco-friendliness of buildings, through retrofitting to the envelope of an existing educational building residing in Cairo-Egypt, using a (Building Energy Modelling) tool, By considering: the building’s geographical location, surrounding climate conditions, building orientation, envelope materials, window to wall ratio, yearly building occupancy schedule, interior space use, and used equipment, and by measuring energy consumption of AC, lighting, and equipment, which represent the building’s total energy consumption for the year 2021, A comparison was made between the actual building’s energy consumption and electric bills of year 2021, and the estimated total consumption according to the simulation, to guarantee the accuracy of simulation results in the future, And by comparison, a 96% match in consumption rates was found throughout the year. Based on the above, a retrofit solution is proposed to maximize eco-friendliness and minimize carbon footprint, this study depends on two main treatments to improve the building envelope, hence increasing energy efficiency, One: is adding climate appropriate thermal insulation which resulted in 18% decrease in AC power consumption and 8.1% decrease in total building energy consumption. And Two: is replacing the building’s glazing material with a more climate appropriate one, which resulted in a 21% decrease in AC power consumption, and a 9.7% decrease in total building energy consumption. | ||||
| Keywords | ||||
| Building envelope - Building energy modelling; Retrofitting - Energy conservation - University buildings | ||||
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