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إنَّ مؤلِّف هذا الكتاب إيماناً منه بالدور العظيم والمقدَّر للأستاذ الجامعي في إثراء حركة التأليف والتعريب والترجمة يأمل أن يفي هذا الكتاب بمتطلبات برامج البكالوريوس والدبلوم لدارسي الهندسة الميكانيكية وهندسة الإنتاج أو التصنيع حيث يغِّطي مناهج نظرية وعملية في الصيانة الوقائية والعلاجية للمنشآت الهندسية (i.e. ميكانيكية، هيدروليكية، نيوماتية، أنظمة إنتاج وغيرها). يتفَّق هذا الكتاب لغوياً مع القاموس الهندسي الموَّحد السوداني، ويُعد الكتاب مرجعاً في مجاله حيث يمكن أن يستفيد منه الطالب والمهندس والباحث ويعتبر الكتاب مقتبساً من مذكرات مؤلفه في تدريسه لهذا المقرر لفترة لا تقل عن خمسة عشر عاماً. يهدف هذا الكتاب لتأكيد أهمية الصيانة الصحيحة للمحركات والآلات والماكينات والمهارات المطلوبة للفنيين، بالإضافة لتمليك الطالب فهم متكامل للصيانة والفائدة المرجوة من الإدارة الجيِّدة لها. يشتمل هذا الكتاب على عشرة فصول يستعرض الفصل الأول فيه أهمية إدارة الموارد المادية والبشرية بالصورة المثلى لتعظيم الأرباح وتقليل الخسائر بالإضافة لتعريف الكلال البدني والعقلي وطبيعته وقياسه، بالإضافة لتعريف الصيانة، أهدافها، أنواعها وتنظيماتها. أيضاً يستعرض هذا الفصل تصنيف المعدات الصناعية من حيث كونها عامة أو خاصة الغرض بالإضافة لعملية إحلال واستبدال الآلات والسياسات المتبَّعة في ذلك. هذا بجانب تنظيم صيانة المعدات ومتطلبات السلامة الصناعية وعلاقتها بعمليات الإنتاج المختلفة. يشتمل الفصل الثاني من الكتاب على تآكل المنشآت الفلزية بمحدداته الاقتصادية والاجتماعية بالإضافة لصوره وأشكاله وأنواعه ومسبباته وكيفية الحد منه. أمَّا الفصل الثالث فيهتم بدور التصميم الهندسي في الصيانة من وجهات نظر سهولة التصميم، التصنيع والصيانة، توفر وسائل الاتصال والنقل. يهتم الفصل الرابع من هذا الكتاب على متطلبات دراسة الجدوى الفنية للمنشآت الهندسية من مواصفات وتصميم. أما الفصل الخامس فيشتمل على المتطلبات الأساسية للجدوى الاقتصادية للمنشآت الهندسية من وجهتي نظر التقييم المالي والتقييم الاقتصادي. يستعرض الفصل السادس أهمية منظومة التيروتكنولوجيا وتطبيقاتها في الصناعة من خلال مراحلها الست التي تشتمل على المواصفات، التصميم، التصنيع والتركيب، التشغيل التجريبي، فترة التشغيل، والإحلال وذلك لتلبية حاجة المستفيد منها بأقصى فائدة وأقل تكلفة ممكنة. يتم خلال الفصل السابع مناقشة أنظمة تزييت وتزليق الآلات ذات الحركة الترددية والدَّوارة من وجهات نظر تقييم نظام التزييت، الوسائل المتاحة للتزييت ودور مشرفي التزييت بالإضافة للفشل الناتج من استخدام زيوت غير مطابقة للمواصفات من حيث رتبتها، تلوثها، نوعها، جدولتها الزمنية أو استنفادها. يهتم الفصل الثامن بقابلية التبادل من حيث تعريفها، دورها في الإنتاج التجاري وخدمة السيارات والمحركات. أما الفصل التاسع فيستعرض تشخيص أعطال محركات الديزل والبنزين من وجهات نظر الأعطال العامة، خدمة أنظمة حقن الوقود في محركات البنزين، وخدمة محركات الديزل. حيث يتم خلال هذا الفصل تحديد المشكلة، معرفة مسبباتها وكيفية علاجها أو تصحيحها. في الفصل العاشر والأخير هنالك مجموعة من الأسئلة غير المحلولة في مقرر الصيانة بالإضافة لمجموعة أخرى من الأسئلة مُصاحبة بإجاباتها النموذجية. إنَّ الكاتب يأمل أن يُساهم هذا الجهد المتواضع في إثراء المكتبة الجامعية داخل السودان وخارجه في هذا المجال من المعرفة ويأمل من القارئ بضرورة إرسال تغذية راجعة إن كانت هنالك ثمة أخطاء حتى يستطيع الكاتب تصويبها في الطبعة التالية للكتاب. والله ولي التوفيق المؤلف أكتوبر 2015م
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... The actual figures may differ depending on service conditions, etc. Table below shows overhaul and expected lifetime of different components of the Wartsila engines. Refer to Ref. [7], [8]. Table Overhaul Interval Though, decreasing the overhauling interval may not eliminate these abnormalities totally but, it will definitely reduce the number of unplanned engine downtime or force stoppage. ...
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This research study has been done in Aljabalein Power Plant at White Nile State. The objective of the study is to compare and differentiate between two types of fuel, light fuel oil (LFO) and crude oil (CRO) used in power plant situated in Aljabalein site. The comparison has been done on different viewpoints including the impact of exhaust gases on the surrounding environment, the performance of engines at different loads, and the operation and maintenance costs. It is found that CRO fuel oil is preferred to LFO fuel due to less operation costs. But it has many disadvantages such as high pollution rates and high consumption of spare parts.
... The actual figures may differ depending on service conditions, etc.Table belowshows overhaul and expected lifetime of different components of the Wartsila engines. Refer to Ref.[7],[8].Table OverhaulInterval and Expected Lifetime of Wartsila EnginesThe actual overhauling interval in Aljabalein Power Plant shown from the above Table was established based from the abnormalities that has been experienced during CRO & LFO operation. Though, decreasing the overhauling interval may not eliminate these abnormalities totally but, it will definitely reduce the number of unplanned engine downtime or force stoppage. ...
Preprint
Full-text available
This research study has been done in Aljabalein Power Plant at White Nile State. The objective of the study is to compare and differentiate between two types of fuel, light fuel oil (LFO) and crude oil (CRO) used in power plant situated in Aljabalein site. The comparison have been done on different viewpoints including the impact of exhaust gases on the surrounding environment, the performance of engines at different loads, and the operation and maintenance costs. It is found that CRO fuel oil is preferred to LFO fuel due to less operation costs. But it has many disadvantages such as high pollution rates and high consumption of spare parts.
... The actual figures may differ depending on service conditions, etc.Table belowshows overhaul and expected lifetime of different components of the Wartsila engines. Refer to Ref.[7],[8].Table OverhaulInterval and Expected Lifetime of Wartsila EnginesThe actual overhauling interval in Aljabalein Power Plant shown from the above Table was established based from the abnormalities that has been experienced during CRO & LFO operation. Though, decreasing the overhauling interval may not eliminate these abnormalities totally but, it will definitely reduce the number of unplanned engine downtime or force stoppage. ...
Preprint
This research study has been done in Aljabalein Power Plant at White Nile State. The objective of the study is to compare and differentiate between two types of fuel, light fuel oil (LFO) and crude oil (CRO) used in power plant situated in Aljabalein site. The comparison have been done on different viewpoints including the impact of exhaust gases on the surrounding environment, the performance of engines at different loads, and the operation and maintenance costs. It is found that CRO fuel oil is preferred to LFO fuel due to less operation costs. But it has many disadvantages such as high pollution rates and high consumption of spare parts.
... The actual figures may differ depending on service conditions, etc. Table ( ) below shows overhaul and expected lifetime of different components of the Wartsila engines. Refer to Ref. [7], [8]. Though, decreasing the overhauling interval may not eliminate these abnormalities totally but it will definitely reduce the number of unplanned engine downtime or force stoppage. ...
Code
This research work has been done in Jabalayn Power Plant at White Nile State. The objective of the study is to compare and differentiate between two types of fuel, light fuel oil (LFO) and crude oil (CRO) used in power plant situated in Aljabalayn site. The comparison have been done in different viewpoints including the impact of exhaust gases on the surrounding environment, the performance of engines at different loads, and the operation and maintenance costs. It is found that CRO fuel oil is better than the LFO due to less operation costs. But it has many disadvantages such as high pollution rates and high consumption of spare parts.
... The actual figures may differ depending on service conditions, etc. Table ( ) below shows overhaul and expected lifetime of different components of the Wartsila engines. Refer to Ref. [7], [8]. Though, decreasing the overhauling interval may not eliminate these abnormalities totally but it will definitely reduce the number of unplanned engine downtime or force stoppage. ...
Chapter
This research work has been done in Jabalayn Power Plant at White Nile State. The objective of the study is to compare and differentiate between two types of fuel, light fuel oil (LFO) and crude oil (CRO) used in power plant situated in Aljabalayn site. The comparison have been done in different viewpoints including the impact of exhaust gases on the surrounding environment, the performance of engines at different loads, and the operation and maintenance costs. It is found that CRO fuel oil is better than the LFO due to less operation costs. But it has many disadvantages such as high pollution rates and high consumption of spare parts.
... The actual figures may differ depending on service conditions, etc. Table ( ) below shows overhaul and expected lifetime of different components of the Wartsila engines. Refer to Ref. [7], [8]. Though, decreasing the overhauling interval may not eliminate these abnormalities totally but it will definitely reduce the number of unplanned engine downtime or force stoppage. ...
Thesis
This research work has been done in Jabalayn Power Plant at White Nile State. The objective of the study is to compare and differentiate between two types of fuel, light fuel oil (LFO) and crude oil (CRO) used in power plant situated in Aljabalayn site. The comparison have been done in different viewpoints including the impact of exhaust gases on the surrounding environment, the performance of engines at different loads, and the operation and maintenance costs. It is found that CRO fuel oil is better than the LFO due to less operation costs. But it has many disadvantages such as high pollution rates and high consumption of spare parts.
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Motor vehicle basic principles
  • V A W Hillier
V A W Hillier, "Motor vehicle basic principles", Anchor Brendon Ltd, Great Britain, (1986).
Automotive mechanics
  • H William
  • Crouse
William H Crouse, "Automotive mechanics", eighth edition, M C Graw -Hill Book Company, (1981