Eficient use of buffer tank for solving low ΔT syndrome in an underground cairo metro station chilled water system / (Record no. 176337)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 04414namaa22004451i 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | EG-GICUC |
| 005 - أخر تعامل مع التسجيلة | |
| control field | 20251130101844.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 251129s2025 ua a|||frm||| 000 0 eng d |
| 040 ## - CATALOGING SOURCE | |
| Original cataloguing agency | EG-GICUC |
| Language of cataloging | eng |
| Transcribing agency | EG-GICUC |
| Modifying agency | EG-GICUC |
| Description conventions | rda |
| 041 0# - LANGUAGE CODE | |
| Language code of text/sound track or separate title | eng |
| Language code of summary or abstract | eng |
| -- | ara |
| 049 ## - Acquisition Source | |
| Acquisition Source | Deposit |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 621.4 |
| 092 ## - LOCALLY ASSIGNED DEWEY CALL NUMBER (OCLC) | |
| Classification number | 621.4 |
| Edition number | 21 |
| 097 ## - Degree | |
| Degree | M.Sc |
| 099 ## - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Local Call Number | Cai01.13.11.M.Sc.2025.Mo.E |
| 100 0# - MAIN ENTRY--PERSONAL NAME | |
| Authority record control number or standard number | Mohamed Mahmoud Mohsen Mansour Abdelaal, |
| Preparation | preparation. |
| 245 10 - TITLE STATEMENT | |
| Title | Eficient use of buffer tank for solving low ΔT syndrome in an underground cairo metro station chilled water system / |
| Statement of responsibility, etc. | by Mohamed Mahmoud Mohsen Mansour Abdelaal ; Supervisor Prof. Dr. Essam El-Din Khalil Hassan Khalil, Dr. Hatem Omar Haridy Kayed, Dr. Ahmed Hamed ElSayed Hamed. |
| 246 15 - VARYING FORM OF TITLE | |
| Title proper/short title | الإستخدام الفعال للخزان المتعادل لحل متلازمة إنخفاض درجات الحرارة في نظام المياه المبردة بمحطة مترو أنفاق القاهرة |
| 264 #0 - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE | |
| Date of production, publication, distribution, manufacture, or copyright notice | 2025. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 99+42 pages : |
| Other physical details | illustrations ; |
| Dimensions | 30 cm. + |
| Accompanying material | CD. |
| 336 ## - CONTENT TYPE | |
| Content type term | text |
| Source | rda content |
| 337 ## - MEDIA TYPE | |
| Media type term | Unmediated |
| Source | rdamedia |
| 338 ## - CARRIER TYPE | |
| Carrier type term | volume |
| Source | rdacarrier |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M.Sc)-Cairo University, 2025 |
| 504 ## - BIBLIOGRAPHY, ETC. NOTE | |
| Bibliography, etc. note | Bibliography: pages 95-97. |
| 520 #3 - SUMMARY, ETC. | |
| Summary, etc. | Chilled water systems commonly experience low ΔT syndrome, where the actual <br/>temperature difference between supply and return chilled water is lower than the <br/>designed value. An extensive literature review was conducted to analyze the causes, <br/>effects, and mitigation strategies for this issue, as well as to survey various research <br/>approaches addressing this point. <br/>In our study, a chilled water system in a real-world building—an underground <br/>Cairo metro station—was modeled using TRNSYS 18. The system's performance was <br/>analyzed under two configurations, one equipped with a buffer tank and another <br/>without. A detailed comparison between the two configurations was conducted, <br/>evaluating temperature differences, water flow rates, chiller plant and pumping energy <br/>consumption. The analysis focused on both energy savings and the effectiveness of <br/>mitigating low ΔT syndrome under identical cooling loads for both cases. |
| 520 #3 - SUMMARY, ETC. | |
| Summary, etc. | تعاني أنظمة المياه المبردة بشكل شائع من متلازمة انخفاض فرق درجات الحرارة، حيث يكون الفرق الفعلي في درجات الحرارة بين المياه المبردة الموردة والعائدة أقل من القيمة المصممة. وقد أجريت مراجعة موسعة للأدبيات لتحليل الأسباب والآثار واستراتيجيات التخفيف لهذه المشكلة، فضلاً عن مسح شامل لمناهج البحث التي تعالج هذه النقطة.<br/>في دراستنا، تم نمذجة نظام مياه مبردة في مبنى حقيقي لمحطة مترو أنفاق القاهرة باستخدام TRNSYS 18. تم تحليل أداء نظامين، أحدهما مزود بالخزان المتعادل والآخر بدونه. تم إجراء مقارنة مفصلة بين النظامين، وتقييم الاختلافات في درجات الحرارة ومعدلات تدفق المياه واستهلاك الطاقة لمحطة التبريد و المضخات. ركز التحليل على كل من توفير الطاقة وفعالية التخفيف من متلازمة انخفاض فرق درجات الحرارة تحت أحمال تبريد متطابقة لكلا النظامين. |
| 530 ## - ADDITIONAL PHYSICAL FORM AVAILABLE NOTE | |
| Issues CD | Issues also as CD. |
| 546 ## - LANGUAGE NOTE | |
| Text Language | Text in English and abstract in Arabic & English. |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Power Mechanics |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | هندسة القوى الميكانيكية |
| 653 #1 - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Chilled water system |
| -- | Low ΔT syndrome |
| -- | Buffer tank |
| -- | Dynamic simulation |
| -- | Energy savings |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Essam El-Din Khalil Hassan Khalil |
| Relator term | thesis advisor. |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Hatem Omar Haridy Kayed |
| Relator term | thesis advisor. |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Ahmed Hamed ElSayed Hamed |
| Relator term | thesis advisor. |
| 900 ## - Thesis Information | |
| Grant date | 01-01-2025 |
| Supervisory body | Essam El-Din Khalil Hassan Khalil |
| -- | Hatem Omar Haridy Kayed |
| -- | Ahmed Hamed ElSayed Hamed |
| Discussion body | Omar Ahmed Soliman Hozayen |
| -- | Mohamed Saad Elmorsi |
| Universities | Cairo University |
| Faculties | Faculty of Engineering |
| Department | Department of Mechanical Power |
| 905 ## - Cataloger and Reviser Names | |
| Cataloger Name | Shimaa |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Thesis |
| Edition | 21 |
| Suppress in OPAC | No |
| Source of classification or shelving scheme | Home library | Current library | Date acquired | Inventory number | Full call number | Barcode | Date last seen | Effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | المكتبة المركزبة الجديدة - جامعة القاهرة | قاعة الرسائل الجامعية - الدور الاول | 29.11.2025 | 92634 | Cai01.13.11.M.Sc.2025.Mo.E | 01010110092634000 | 29.11.2025 | 29.11.2025 | Thesis |