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52 result(s) for "العزل الحراري"
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المعالجات الفنية لأنظمة العزل في تصميم جهاز الحاسوب
يعد مفهوم العزل من المفاهيم المهمة والأساسية في الدراسة الحالية لاسيما التكنولوجية منها في عمل جهاز الحاسوب، في اعتماد تبادلية التأثير ما بين نظامي العزل الحراري والمائي من خلال مستويات أداء أنظمة التبريد المناسبة للمكونات الإلكترونية المنتجة لقب تنت ق4 فر5 فللحرارة، فضل عن تعزيز الحاسوب بنظام حماية من مخاطر الماء، ولتحقيق هذا الهدف ومعالجة المشكلة البحثية، تم تناول دراسة مستويات متعددة من المفاهيم والأساليب التقنية للعزل، وإجراء استعراض للحواسيب المنتجة للحرارة، فضلا عن أهم أنظمة التبريد المتبعة من خلال الأساسيات العلمية لانتقال الحرارة بالتوصيل والحمل والإشعاع، ودراسة علاقة نظام العزل المائي بالمنافذ المتعددة في مجسم المنتج، فضلا عن ماهية دور المؤثر البيئي من خلال مستويات العزل الحراري والمائي في الفضاء الداخلي وعلاقته بأداء أنظمة العزل الحراري والمائي فيه ومديات التأثير المتبادل على المكونات المادية والبرمجية بأداء الحاسوب كذلك بيان المعالجات التصميمية لشكل وعلاقته بالتكوين الداخلي لمنظومة العزل من خلال المستحدثات التقنية فضلا عن الإسهامات الجمالية للأسس والعناصر التصميمية في بنية العزل للمنتج الصناعي.
Review on Building Energy Effeciency through Optimized Building Envelopes
Energy-efficient building envelopes consider material thermophysical properties and wall section configuration to optimize energy consumption for cooling and heating in response to climate. A review of 80 papers revealed that published information on this subject is diverse, contains inconsistencies in findings, and shows contradictory results. Therefore, hypothesizing a suitable building envelope for efficient year-round performance per climate is difficult through published literature alone. The aim of this paper is to identify trends and gaps in studies regarding efficient year-round building envelopes. Relevant literature published from 1997 to 2023 was reviewed. A data extraction process was used to organize performance parameters of thermal insulation and thermal mass. The relationships between climate, wall configuration, and thermophysical properties in published experimental studies were then analyzed. Results of static thermal insulation investigations revealed a trend where the most common placement is interior or embedded, however inconsistencies in results were found depending on climate. Dynamic insulation is predicted to show promising results, although it is a novel solution under research. Moreover, multilayer walls of thermal insulation and thermal mass show better mitigation for thermal discomfort in climates with high diurnal fluctuation compared to other climates. Furthermore, latent heat storage using Phase Change Materials (PCMs) was found to be more advantageous than sensible heat storage. This study highlights future potential research on building envelopes in different climates and microclimates and their respective thermophysical properties requirements.
Using Crashed Bricks to Increase the Thermal Resistance of Building Roofs in Hot Countries
In hot countries like Iraq, during the summer season, the temperature reaches about 50 °C, which has a direct impact on energy consumption due to the usage of cooling systems. Therefore, this study aims to reduce the solar radiation that is absorbed by the building's roof by using an insulator made of crashed bricks. In this research, a small model was created to replicate the roof properties, and then a heater set at the appropriate temperature was used to mimic the amount of heat coming from the sun. The amount of heat transfer is calculated for the roof with and without the insulator, and the study determines the different thicknesses and sizes of crashed brick as an insulator.
A Review on Textile Products for Reinforcing Concrete Sandwich Panels
Concrete sandwich panels have gained considerable popularity in the construction industry. Based on their structural and thermal performance, sandwich panels have been employed in industrial, residential, and commercial structures. Two concrete outer layers are connected by connections that run through the interior insulating material, which is isolated from the exterior layers by an insulating stiff foam core to increase thermal effectiveness. There are numerous issues with the steel used for reinforcement including corrosion, high cost, heavy weight, increased thickness, and thermal bridges. Textile reinforcing concrete (TRC) is a solution for these issues, for that; researchers have attempted to replace steel with various textile goods to improve the quality of sandwich panels. Many researchers used textile' grides for enhancing sandwich panels' thermal isolation and reinforcing properties as nets or as a connector. This article reviews and observes methods of reinforcing concrete sandwich panels with TRC with different materials, constructions, behavior and application of textiles for investigating sandwich panels' performance as well as textile reinforcing of concrete and discussing differences between these applications. It was found that TRC can be used for reinforcing concrete sandwich panels as core, as grid or as a connector, All these shapes of TRC effect on the performance of concrete sandwich panels positively.