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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
Thu Sep 01 2022
Journal Name
مجلة الدراسات المستدامة
مدى التزام المصارف الخاصة باليات تشكيل لجان التدقيق على وفق قانون الشركات وميثاق البنك المركزي العراقي
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ى ىلإ يقيبطتلا وبناج يف ثحبلا ىعس دقو ،ةصاخلا ةيراجتلا ؼراصملا يف ؽيقدتلا فاجل ؿيكشت ( تمض ةنابتسا ةرامتسا ـيمصت متخم تاعاطق ىمع ؿماكلاب ايعاجرتسا ـتو فايبتسا ةرامتسا ) 36 ةف فم فإ :ايمىا فاك تاجاتنتسلاا فم ةعومجمل ثحبلا ؿصوت دقو ،ؽيقدتلا فاجل ؿمعب ةمص تاذو تامومعملاب ةقثلا زيزعتو ةيلاملا ريراقتلا ةدوج فامض يف اىرود وى ؽيقدتلا فاجمل ةميملا ـايملا ا يف يرادلإاو يلاملا ءادلأا طبض ةيممع ىمع سكعني هرودب يذلاو

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Publication Date
Thu Dec 01 2011
Journal Name
Journal Of Accounting And Financial Studies ( Jafs )
أثر التغيـيـر فـي رأس المال الممتلك على ربحيـة المصـارف: دراسة تحليلية لمصرف الشرق الأوسط العراقي للاستثمار
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Capital is a property bank is very important, because it is part of the liquidity in the bank, which is a line of defense in the bank and secured against any losses that may be exposed to the banks, and in the case of low value of any item of the assets and the lack of a dedicated absorb the decline, while play a key role to some extent in the financing of fixed assets and in particular the relative importance of fixed assets is relatively small compared to the size of bank  assets.                                           &n

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Publication Date
Mon Jan 02 2023
Journal Name
مجلة المستنصرية لعلوم الرياضة
واقع االعالم الرياضي العراقي المرئي من وجهة نظر طالب كلية التربية البدنية وعلوم الرياضة جامعة بغداد
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Publication Date
Mon Jan 01 2018
Journal Name
المجلة القانونية العلمية المحكمة
انتهاء خدمة الموظف الضريبي بقوة القانون العام والتشريعات النافذة في القانون العراقي والضوابط السنوية دراسة مقارنة
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Publication Date
Mon May 01 2023
Journal Name
Rimak International Journal Of Humanities And Social Sciences
THE EFFECT OF ARRANGING WOMEN'S ISSUES IN THE IRAQI ELECTRONIC NEWSPAPERS' WEBSITES ON THE COGNITIVE LEVEL OF IRAQI UNIVERSITY FEMALE TEACHERS A FIELD STUDY OF A SAMPLE OF FEMALE TEACHERS AT THE UNIVERSITY OF BAGHDAD
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Women are considered the real power to build societies, as they are half of society, and it is their responsibility to raise generations، as human history testifies to the recording of great names with their giving and achievement in various scientific, social and humanitarian disciplines. Because of the importance of women in our lives, society must give them special care, whether at home or within the community structure to which they belong, so that they contribute to the image that brings about a transformation in the public scene, as well as providing them with support to take charge of bringing about change themselves, and this explains the interest of the press at all levels. Women's issues and topics through various journal

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Publication Date
Sat Oct 01 2016
Journal Name
I-manager’s Journal On Communication Engineering And Systems
SOLVING NETWORK CONGESTION PROBLEM BY QUALITY OF SERVICE ANALYSIS USING OPNET
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Among many problems that reduced the performance of the network, especially Wide Area Network, congestion is one of these, which is caused when traffic request reaches or exceeds the available capacity of a route, resulting in blocking and less throughput per unit time. Congestion management attributes try to manage such cases. The work presented in this paper deals with an important issue that is the Quality of Service (QoS) techniques. QoS is the combination effect on service level, which locates the user's degree of contentment of the service. In this paper, packet schedulers (FIFO, WFQ, CQ and PQ) were implemented and evaluated under different applications with different priorities. The results show that WFQ scheduler gives acceptable r

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Publication Date
Tue Oct 04 2022
Journal Name
Caspian Journal Of Environmental Sciences
Detecting genetics of several isolated bacterial species from soils by hydrocarbons
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The presence of hydrocarbons in the soil is considered one of the main problems of pollution. In our current study, eight samples isolated from soil saturated with hydrocarbons were taken from different areas of Baghdad, Iraq. In this study, 5 isolates belonging to Pseudomonas aeruginosa by 99%, 4 isolates to Klebsiella pneumoniae by 98%, and 3 isolates to Enterobacter hormaechei by 97% were diagnosed in different ways. A molecular examination was also conducted by 16sRNA. We recorded P. aeruginosa, K. Pneumoniae and E. hormaechei as new local isolates in NCBI. In addition, a comparison was made between our isolates and the global isolates to determine the degree of convergence in the evolutionary line. The genes alkB and nahAc7 were diagno

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Scopus
Publication Date
Wed Jan 01 2020
Journal Name
Periodicals Of Engineering And Natural Sciences
Estimation of return stock rate by using wavelet and kernel smoothers
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This article aim to estimate the Return Stock Rate of the private banking sector, with two banks, by adopting a Partial Linear Model based on the Arbitrage Pricing Model (APT) theory, using Wavelet and Kernel Smoothers. The results have proved that the wavelet method is the best. Also, the results of the market portfolio impact and inflation rate have proved an adversely effectiveness on the rate of return, and direct impact of the money supply.

Scopus (3)
Scopus
Publication Date
Sun Jan 01 2023
Journal Name
Aip Conference Proceedings
Behavior of asymmetrical castellated composite girders by gap in steel web
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Publication Date
Tue Dec 01 2020
Journal Name
Journal Of Engineering
Performance of 2- Link Robot by utilizing Adaptive Sliding Mode Controller
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The Sliding Mode Control (SMC) has been among powerful control techniques increasingly. Much attention is paid to both theoretical and practical aspects of disciplines due to their distinctive characteristics such as insensitivity to bounded matched uncertainties, reduction of the order of sliding equations of motion, decoupling mechanical systems design. In the current study, two-link robot performance in the Classical SMC is enhanced via Adaptive Sliding Mode Controller (ASMC) despite uncertainty, external disturbance, and coulomb friction. The key idea is abstracted as follows: switching gains are depressed to the low allowable values, resulting in decreased chattering motion and control's efforts of the two-link robo

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