The distribution of chilled water flow rate in terminal unit is a major factor used to evaluate the performance of central air conditioning unit. In this work, a theoretical chilled water distribution in the terminal units has been studied to predict the optimum heat performance of terminal unit. The central Air-conditioning unit model consists of cooling/ heating coil (three units), chilled water source (chiller), three-way and two-way valve with bypass, piping network, and pump. The term of optimization in terminal unit ingredient has two categories, the first is the uniform of the water flow rate representing in statically permanents standard deviation (minimum value) and the second category is the maximum heat transfer rate from all terminal units. The hydraulic and energy equations governing the performance of unit solved with the aid of FORTRAN code with considering the following parameters: total water flow rate, chilled water supply temperature, and variable valve opening. It was found that the optimum solution of three-way valve case at 8°C water supply temperature, 0.12 kg/s total water flow rate and valve opening order (valve 1: 100%, valve 2: 100% and valve 3: 75%) with total heat rate (987.92 Watt) and standard deviation (1.181E-3). Also, for the two-way valve case the results showed that the optimum condition at 8°C water supply temperature, 0.12 kg/s total water flow rate and valve opening order (valve 1: 75%, valve 2: 75% and valve 3: 50%) with total heat rate and standard deviation (717Watt) and (5.69E-4) respectively.
يتناول الاخلال في عقد البيع الدولي للبضائع وفقاً لاتفاقية فيينا والمسؤولية الناشئة عنه
اللغة العربية هي لغة القران الكريم وقد تحدى الله تعالى بها جميع العرب الناطقين بها وبأفصح الفاظها فنراهم عجزوا عن ان ياتوا بكلام مشابه للقران الكريم .فنجد ان الالفاظ القرانية قد حملت في ثناياها من المواعظ والحكم الشي الكثير لذلك فان المتابع المنصت المتتبع لهذه الالفاظ قد تحصن بحصن عظيم. ونستطيع فهم هذه الألفاظ من خلال مراجعة وقراءة مافسره لنا المفسرون لهذا الكتاب المقدس ومن الموضوعات التي زخر بها القران الكر
... Show MoreBaghdadin Drinks and Foods stuff Abbasyat Ages
تعد الاسرة إحدى الوحدات الاجتماعية التي تهيئ الجيل المتطلع للحياة وهم الاطفال، وهي المهد الطبيعي للطبقة البشرية التي تباشر وتواجه اثراً هاماً تكوين الشخصية والسلوك الاجتماعي والخلقي ، وهي نقطة الوصول والتفاعل بين البيولوجي والاجتماعي وعنها ينشأ التفاعل النفساني ، وشبكة العلاقات الاسرية والعلاقات الخارجية المجتمعة . ومن خلال معاييرها وقيمها ينشأ السلوك سوياً كان ام مرضياً ( جانحاً ) ، ومشكلة جنوح الا
... Show MoreThe research came to a statement in explaining the impact of movement in general in the Arabic language, as a word and sentence, in the Holy Qur’an in particular, and the Arabic syntactic movement in understanding the Qur’anic text.
The research contained two sections. Each section has two demands, an introduction, and a preface. The most prominent titles of the research are the aspect of parsing, which is one of the characteristics of the Ḍād; the definition of parsing in language and terminology; the impact of movement on understanding the Arabic text in general; and in understanding the Qur’anic text in particular
Through tracingthe term “derivation” in the Holy Quran, I found that the word derivation varies and graduates in meaning from one form to another according to what has been mentioned in the Quranic context. In order to show that variation and graduation, we trace it in three axes:
The first axis (openness): the term “derivation” graduates from the meaning of openness and opening in its broad meaning to partial openness.
The second axis (the dispute): the term “derivation” participated with the general and private meaning, i.e. from hostility to antipathy.
الدور السياسي للاحزاب الاسلامية في تركيا
The codification of the social history of the city of Baghdad will be filled with an inherited folklore that has been descended to it from the previous generations with all its tales of folk tales, metaphors, parables, crafts and industries. Immortal
Islamic banking refers to a system of banking or banking activity that is consistent with the principles of the Shari'ah (Islamic rulings) and its practical application through the development of Islamic economics. The principles which emphasise moral and ethical values in all dealings have wide universal appeal. Shari'ah prohibits the payment or acceptance of interest charges (riba) for the lending and accepting of money, as well as carrying out trade and other activities that provide goods or services considered contrary to its principles. While these principles were used as the basis for a flourishing economy in earlier times, it is only in the late 20th century that a number of Islamic banks were formed to provide an alternative basi
... Show Moreاشكالية المواطنة في الخطاب الاسلامي المعاصر