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alkej-358
Thermal Conductivity Enhancement of Iraqi Origin Paraffin Wax by Nano-Alumina
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Abstract

 

Paraffin wax is utilized for the heat storage applications taking advantage from the high stored latent heat during the phase change (from solid to fluid) period. What isn't right with this procedure is that the wax has a little heat transfer rate because of its low thermal conductivity. The thermal conductivity improvement of the paraffin wax has been examined utilizing nano-material with high thermal conductivity. In the recent study, (Al2O3) nanoparticles with weights of 1, 2, and 3% of the paraffin wax were added to the paraffin wax. The Iraqi paraffin wax accessible at the local markets was utilized as a phase change material (PCM).

Many properties of the wax were changed due to the addition of nanofillers. The wax color was changed from light brown to white. The thermal conductivity of the paraffin wax was expanded by increasing the additional nanoparticles extent with 37.1, 42.3 and 60.32% for 1, 2 and 3% added nano-Al2O3 compared to pure wax conditions. The subsequent change in the thermal conductivity of the paraffin wax makes it reasonable for the use in thermal storage applications.

 

Keywords: Latent heat, Nano-alumina, Paraffin wax, Thermal storage,

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Publication Date
Wed Dec 25 2019
Journal Name
Journal Of Accounting And Financial Studies ( Jafs )
تحليل مؤشرات الأهلية الائتمانية السيادية للاقتصاد العراقي للمدة (2004- 2015)
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The research aims at analyzing the indicators of the sovereign credit of oil and without oil to determine the face of the Iraqi economy from the challenges that would impede the process of growth and economic development for the period (2004-2015).

       the research tries to show some lessons to be learned from those indicators, Many of the most important conclusions, acceptance of the hypothesis of research and the weakness of sovereign credit capacity in Iraq to bear the sovereign debt and its burden and work to achieve sustainable economic and social development "in an economy in which oil is neutralized as a single commodity depends on them to meet the requirements of efficiency and efficiency

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Publication Date
Thu May 04 2017
Journal Name
مؤتمر الإصلاحات التشريعية اساس النهوض بالواقع العراقي
الامتيازات الوظيفية في ضوء المتغيرات التشريعية (دراسة في القانون العراقي)
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Publication Date
Wed Oct 01 2014
Journal Name
مجلة كلية القانون جامعة ذي قار
ملاحظات في قانون حماية المستهلك العراقي رقم 1 لسنة 2010
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ملاحظات في قانون حماية المستهلك العراقي رقم 1 لسنة 2010

Publication Date
Wed Jan 01 2014
Journal Name
مجلة كلية الحقوق
النظام التأديبي لطلبة الجامعات دراسة مقارنة في القانونين العراقي والمصري
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Publication Date
Fri Dec 01 2017
Journal Name
Journal Of Economics And Administrative Sciences
الاختلال الهيكلي للميزان التجاري العراقي للمدة (2014-1994) دراسة تحليلية
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The research is to use the specifications and detection of the main and secondary causes of the problems that lead to the weakness and low quality of local production in Iraqi companies and develop appropriate solutions to them, as Iraqi companies suffer from the low quality of production, And the adoption of the requirements of ISO 9001: 2008, which contributes to the development of production processes within the company, and through the field co-operation and survey conducted for public companies affiliated to the Ministry of Industry and Minerals, The importance of the research through the statement of the most important problems facing the General Company for vegetable oil industry in terms of low and weak in production qual

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Publication Date
Wed Feb 20 2019
Journal Name
Political Sciences Journal
Expecting Iraqi Regional Role
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Each of the countries that make up the international community and active in international and regional relations has specific elements and tools. Their roles differ according to those components and tools. There are countries that play an effective and effective international role, while others play an effective and effective regional role. The international or regional role in order to be effective and influential must be based on a set of conditions that will give it a degree of credibility and achieve the objectives of the role. The state affects the decisions of other countries because of its ability, and the ability of the state to influence is not limited to military power only, but political, economic, demographic, technical, geo

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Publication Date
Tue Jul 14 2026
Journal Name
Nasaq
Religiosity in Iraqi society
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Publication Date
Thu Jan 04 2024
Journal Name
Journal Of Accounting And Financial Studies ( Jafs )
The impact of recent trends of the Central Bank of Iraq in activating bank credit for the private commercial banking sector
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Abstract:

                 Central banks seek to control and supervise credit and follow it up effectively due to the high credit risks surrounding it that may lead to damage to banks, and may even lead to damage to the reputation and confidence of the banking system as a whole.

The main role of supervisory control is to control credit by controlling it from excessive expansion during periods of economic inflation or its revitalization and improvement and expansion of credit transactions in cases of economic recession, or when central banks desire to support the national economy or support a sector of various

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Publication Date
Fri Apr 21 2023
Journal Name
Aip Conference Proceedings
Study the contrast of thermal expansion behavior for PMMA denture base, single and hybrid reinforced using the thermomechanical analysis technique (TMA)
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This research investigated the effect of adding two groups of reinforcement materials, including bioactive materials Hydroxyapatite (HA) and halloysite nanoclay and bioinert materials Alumina (AL2O3) and Zirconia (ZrO2), each of them with various weight ratios (1,2,3,4 &5)% to the polymer matrix PMMA. The best ratios were selected, and then a hybrid was preparing Composite red from the best ratios from each group. Thermal properties, including thermal conductivity and Thermomechanical Analysis (TMA) technology, have been studied. The results showed that adding 3% Hydroxyapatite (HA) and 5% halloysite nanoclay to the polymethacrylate (PMMA) mer leads to an increase in thermal conductivity. It was also found from the Thermomechanical Analysis

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Publication Date
Tue Jun 17 2025
Journal Name
Baghdad Science Journal
Synthesis, Characterization and Studying Mass Spectra and Thermal Analysis for Complexes of Some Metal Ions and Determining their Activity as Antioxidants
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The new azo dye was prepared from the reaction of the diazonium salt derived from 3-aminophenol with 2- hydroxyquinoline, then it was used to prepare a series of complexes with the chlorides of cobalt, chromium, copper, nickel, platinum, palladium and ammonium molybdate. The ligand was identified by a proton and carbon nuclear magnetic resonance spectroscopy, and the compounds were collected. The prepared materials were subjected to infrared, ultraviolet-visible, and mass spectrometry, as well as thermogravimetric analysis, differential calorimetry, and elemental analysis. Conductivity, magnetic susceptibility, metal content, and chlorine content of the complexes were also measured. The results showed that the ligand behaves in a trigonal b

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