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Article
PERFORMANCE ANALYSIS OF A COMPACT SOLAR WATER HEATER WITH PARAFFIN WAX STORAGE UNIT

Authors: Raid Salman Fahad --- Amir Fadhil Noori --- Aouf Abdulrahman Al-Tabbakh
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2019 Volume: 23 Issue: 1 Pages: 135-144
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

The present work experimentally studies the thermal performance of a solar collector integrated with a thermal storage unit to form a compact solar water heater. The storage capacity is further enhanced by attaching a phase-change storage unit containing phase change material (PCM) which is paraffin wax. The two units (tanks) take the form of two shallow rectangular boxes (compartments) tilted at 45o to the horizon and are firmly attached to ensure complete mutual heat transfer between them. Water and PCM fill the top and bottom tanks respectively. Measurements were carried out from 8 a.m. to 4 p.m. where the temperatures at various locations in the system were measured along with ambient temperature and solar radiation intensity. Results show that the temperature of both compartments increases continuously during the simulated period with the upper tank having the higher temperatures. The PCM average temperature did not reach melting range (55oC – 60oC) which requires either decreasing the amount of PCM or using a PCM with a lower melting point. The maximum temperatures reached are 82oC for water and 47oC for PCM which are measured at 4 p.m. and the maximum overall system efficiency of the system was 74% at 11:30 a.m.


Article
MODELING OF THE FORCES AND AREA MILLING OF THE PLASTICS IN RECYCLING

Author: Ali Abdul-Emir AL-Zubiedy, Babylon University, College of Engineering Materials, and Raid Salman Fahad, M.Sc,
Journal: Journal Of Wassit For Science & Medicine مجلة واسط للعلوم والطب ISSN: 58161992 Year: 2011 Volume: 4 Issue: 2 Pages: 136-147
Publisher: Wassit University جامعة واسط

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Abstract

An example is presented in this study, the characteristic of multi-disc mill for a good construction has an important role modeling of forces and area milling of the plastics in recycling specifically analysing loads quasi-shearing. In this theoretical study advanced software such as Solid Works are preformed. The authors used a program of quasi-shearing for plastics specimens made of primary and recycled polymer in order to determine strains and loads in actual mill. Continuous machine crumbling of recycled plastic materials is also examined. This allows the authors to determine efficiency and power requirements, in direction of optimization.

في هذه الدراسة النظرية تمت دراسة مجموعة من المحددات أو المتغيرات للتفريز (التقطيع) وذلك عن طريق أقراص متعددة ذات تركيبة جيدة لغرض تحديد نموذج ومعادلة مهمة لتمثيل قوى ومساحات التقطيع لتحليل قوى شبه القص وخصوصاً في البلاستك (القياسي والمعاد).في هذا البحث تمت معالجة الأمور الحسابية بواسطة البرنامج (Solid Work) وكذلك تم إستخدام برنامج لشبه القص لصناعة نماذج من البلاستك (البوليمر) القياسي والمعاد لإيجاد القوى والانفعالات في عملية التفريز الحقيقية. كذلك التشغيل المستمر والانهيار للمواد البلاستيكية المعادة تم إختبارها.هذا البحث يسمح للباحثين أن يقرروا الكفاءة والقدرة المطلوبة من أجل خلق المثالية لعملية تفريز البلاستك.

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