Numerical study on airflow in an office room with grill and square ceiling diffusers

العناوين الأخرى

دراسة عددية لحركة الهواء داخل مكتب بواسطة ناشر جانبي و ناشر سقفي

مقدم أطروحة جامعية

al-Asadi, Abd al-Amir Hamid Muhammad

مشرف أطروحة جامعية

Munim, Ali A.

أعضاء اللجنة

Raghib, Abd al-Muhsin A.
al-Bahadilly, Sadun F.
al-Abbasi, Sajid H. Ali

الجامعة

جامعة البصرة

الكلية

كلية الهندسة

القسم الأكاديمي

قسم الهندسة الميكانيكية

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2012

الملخص الإنجليزي

The objective of this work is to compare two types of diffusers and to know which one is most appropriate for thermal comfort and indoor air quality with an office room. In this work, two types of diffusers are used: grill diffuser and square ceiling diffuser to study the effect each type on Air Diffusion Performance Index (ADPI) and then on thermal comfort.

In order to do this the following parameter are changed: the number of inlet, the locations of inlet, the number of outlet, the locations of outlet and supply airflow rate and supply air temperature to verify the case of suitable ADPI that most appropriate for thermal comfort and indoor air quality.

A numerical study of the continuity, the momentum and the energy equations together with the two equations of the RNG k-ɛ turbulence model is performed by using finite volumes method to transfer these equations from differential forms to algebraic forms which can be solved according to the SIMPLEC algorithm procedure.

A 3D developing flow was solved using CFD software FLUENT 6.3. At the first, IEA standard test room with Hesco nozzle diffuser was used for verification the direct description method that was used to model grill and square ceiling diffusers, and good agreement was obtained compared with the results from previous authors.

As a final results it was found that the best case is with single grill diffuser near ceiling and outlet is on ceiling near grill diffuser for intermediate range of air flow rate and temperature that lead to small difference of temperature for height and ADPI is equal to 89 %.

التخصصات الرئيسية

الهندسة الميكانيكية

الموضوعات

• النماذج الرياضية
• ديناميكا الموائع
• الديناميكا الهوائية

عدد الصفحات

137

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-317178