Studying the Performance of Refrigeration Units Powered by Solar Panel

Venus Majeed Hameed; Maha Ali Hussein

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Publication Date

Sat Mar 30 2013

Journal Name

Iraqi Journal Of Chemical And Petroleum Engineering

Volume

14

Issue Number

1

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Studying the Performance of Refrigeration Units Powered by Solar Panel

Solar Panel

solar electric refrigeration

Refrigeration system

photovoltaic cell

coefficient of performance

Venus Majeed Hameed

Maha Ali Hussein

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An experimental study was conducted to determine the performance of a solar electric refrigeration system. The system contained flat photovoltaic solar panel which absorbs the solar energy and convert it to electrical energy, used to run the refrigeration cycle. Two refrigeration cycles with electrical solar panel were used over a period of 12 months, the first one with classical parts known in refrigeration cycle, while the second one introduced heat exchanger which improves the coefficient of performance by saving the consumed energy. The coefficient of performance of these refrigeration cycles with compressor efficiency 85% are 2.102 and 2.57 respectively. The overall efficiency of the two systems are 18.9% and 23.13%.

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Publication Date

Tue Aug 01 2017

Journal Name

Journal Of Economics And Administrative Sciences

Relationship of the key elements of Knowledge management with strategic performance / filed research sample of private banks in Baghdad

/ العناصر الأساسية لإدارة المعرفة والأداء الاستراتيجي .

صلاح الدين عواد

شمس معزز

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objective the research to diagnosis and interpretation of the nature of the correlation between the basic elements of knowledge management (tecgnology , structure , culture , process , human resource ) and the strategic performance of the Iraqi private banks, the research community and the level dimensions, and tested this research in the private banking sector represented by (7), especially in Baghdad city, Iraqi banks, and applied on sample consisting of 100 distributors in several administrative levels Director (Director, Director of the department, branch manager), and use questionnaire Head to collect data and information tool, and some private banks annual reports, has sought research to test a number of h

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Publication Date

Sat Jul 23 2016

Journal Name

Association Of Genetic And Environmental Resources Conservation (

Effect of cold and hot aqueous extract of garlic on the reproductive performance of immature male mice until puberty

garlic

hot

extract

aqueous.

Nahla

Rana

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This study was investigated the role of garlic extracts on the reproductive functions, via the development of immature male mice (25 days old) un l puberty. Immature male mice were divided into 3 groups (n=25). Group 1 "control" was daily administrated with tap water. Group 2 was daily administrated with cold aqueous garlic extract. Group 3 was daily administrated with hot aqueous garlic extract. Each group was randomly consisted of 5 subgroups (n=5/ subgroup) and administrated for different periods i.e, 1, 2, 3, 4 and 5 weeks respectively. Animals were scarified after 24 h from last treatment. Our findings elucidated that, cold and hot aqueous garlic extracts, when administrated at 25 days old (Immature period) have different impact dep

Publication Date

Sun Feb 28 2021

Journal Name

Journal Of Economics And Administrative Sciences

The use of the genetic algorithm to estimate the parameters function of the hypoexponential distribution by simulation

Mean arrival rate

probability density function

cumulative distribution Function

Hypoexponential distribution

Genetic algorithm

Maximum likelihood estimation

Salam Jasim

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In this research, the focus was placed on estimating the parameters of the Hypoexponential distribution function using the maximum likelihood method and genetic algorithm. More than one standard, including MSE, has been adopted for comparison by Using the simulation method

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Publication Date

Sat Sep 30 2023

Journal Name

Journal Of Accounting And Financial Studies ( Jafs )

Measuring the cost of consulting services under the traditional cost approach and the performance-based costing technique and its impact on achieving profits : Applied research in the advisory office of Al-Khwarizmi College of Engineering - University of Baghdad

performance-based costing technology

traditional techniques

cost of services

knowledge foundations of profits

Qassem Jawad Kazem

Prof. Dr. Sabiha Barzan Al-Obaidi

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Abstract:

This research aims to apply the Performance Focused Activity Based Costing System in the consultant office of Al-Khwarizmi College of Engineering at the University of Technology for the purpose of measuring the cost of consulting services provided by these offices in order to reduce costs and their reflection in achieving profits. For the purpose of calculating costs accurately, and to test the hypothesis of the research, the research was applied in the office of the consultant of the College of Engineering Al-Khwarizm - University of Baghdad through the financial statement

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Publication Date

Mon May 08 2017

Journal Name

Ibn Al-haitham Journal For Pure And Applied Sciences

Sedimentary Structure and Determine the Diriction of the Old Current to the By Hassan Formation Northeast Iraq

:Sedimentary Structures

Diriction of the Old Current

Source Rocks.

M.J.

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This research deal the primary and secondary sedimentary structures in the By Hassan Formation in the three locations in the northeast of Iraq. Can be recognize many geological structures such as cross bedding, planer bedding, graded bedding, channel structure and mud ball house deposit in the flood plain. The ether side this research study the direction of old current and sedimentary structure that made by the one direction current

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Publication Date

Tue Oct 01 2019

Journal Name

Poultry Science

Effect of using ionized water on some productive and physiological performance of Japanese quails

ionized water

physiological performance

egg production

Japanese quails

Hasanain

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This study was conducted to explore the effects of using ionized water on the productive and physiological performance of Japanese quails (Coturnix japonica). Our study was conducted at a private farm from 20th April, 2016 to 13th July, 2016 (84 d). One hundred 42-day-old Japanese quail chicks were used, divided randomly into 5 groups with 4 replicates. Treatments consisted in a control group (T1 - normal water:), alkaline (T2 - pH 8 and T3 - pH 9), and acidic water (T4 - pH 6 and T5 - pH 5). All birds were fed a balanced diet of energy and protein. The egg production ratio, egg weight, cumulative number of eggs, egg mass, feed conversion ratio, productivity per hen per week, and effects on plasma lipids, uric acid, glucose, calcium, and ph

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(4)

(1)

Publication Date

Wed Jul 01 2020

Journal Name

Iop Conference Series: Materials Science And Engineering

Increasing the Setting Time of Local Gypsum (Joss) by the Use of TGP additive

Ahmed S. D.

Ali A.

Essam H.

Hussein H.

Layth Sahib

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Abstract<p>This research presents a study of using an additive for the objective of increasing the setting time of a material used in several aspects in the constructional field, this material is “Local-Gypsum” which is locally called “Joss”, and the additive used in this study is “Trees Glue Powder” denoted by “TGP”. Nine mixtures of Local-gypsum (joss) had been experimented in the current study to find their setting time, these mixes were divided into three groups according to their water-joss ratios (W/J) (0.3, 0.4 and 0.5), and each group was sub-divided into three sub-groups according to their TGP contents (0.0%, 0.3% and 0.6%). It was found that, when TGP is added with the </p> ... Show More

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Publication Date

Sat Oct 01 2016

Journal Name

Journal Of Theoretical And Applied Information Technology

Factors affecting global virtual teams’ performance in software projects

Today the trend is to perform software development work via distributed geographical area among team

individual or even as an organization. However

due to the global market and international presence of many companies

there is a need to implement a global virtual teams. The global virtual team members are gradually engaged in globalized business environments across space

time and organizational boundaries via information and communication technologies. A global virtual team relies on communication

collaboration

and information exchange are the most important criteria in global virtual teams’ operations. The purpose of this paper is to answer two research questions. The first research question is to identify the factors affecting global virtual teams’ performance. A systematic literature review was conducted to answer the first research question. The second research question is on what the rank of the factor affecting the global virtual teams’ performance according to their level of effect on global virtual teams’ performance. Online survey was conducted within 103 developers and IT managers from eight IT companies to answer the second research question. The Statistical Package for Social Science (SPSS 22) was used to analyze the collected data. In this study

we investigated factors that affect global virtual teams’ performance

factors considered include cultural differences

language problems

time-zone differences

team size

technical problems

lack of trust

lack of sufficient training

and ICT problems. Also the findings indicated that lack of sufficient training is the highest level of effect on global virtual teams’ performance. On the other hand

Ali Yahya Gheni

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(23)

Publication Date

Thu Feb 01 2018

Journal Name

Journal Of Engineering

Statistical analysis of the removal of Chromium(VI)by Iron Oxide Nanoparticle (Fe3O4)

Chromium (VI)

Adsorption

Design of experiments

Iron Oxide Nanoparticle (Fe3O4).

Najwa Saber

Duaa Mohammed

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Investigation of the adsorption of Chromium (VI) on Fe₃O₄ is carried out using batch scale experiments according to statistical design using a software program minitab17 (Box-Behnken design). Experiments were carried out as per Box-Behnken design with four input parameters such as pH (2-8), initial concentration (50–150mg/L), adsorbent dosage (0.05–0.3 g) and time of adsorption (10–60min). The better conditions were showed at pH: 2; contact time: 60 min; chromium concentration: 50 mg/L and magnetite dosage: 0.3 g for maximum Chromium (VI) removal of (98.95%) with an error of 1.08%. The three models (Freundlich, Langmuir, and Temkin) were fitted to experimental data, Langmuir isotherm has bette

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Publication Date

Mon Apr 01 2019

Journal Name

Journal Of Educational And Psychological Researches

Requirements for Implementing School Performance Indicators System

Abdulaziz Saeed Alqahtani

Saleh Awad Alammari

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The aim of the research is to find out the availability of the requirements of applying the indicators of school performance system in the public schools in Mahayel Asir educational directorate through the school planning indicator, the safety and security indicator, the active learning indicator, the student guidance indicator and determining the existence of statistically significant differences between the responses of the research community according to the variable of (scientific qualification - years of work as a principal - training courses). The questionnaire was used as a tool for data collection from the research community, which consists of all the public schools’ principals (n=180) Mahayel Asir educational directorate

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