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             Publication of a Scientific article within Clarivate Index Q1              The Renewable Energy Research Center welcomes members of the College of Engineering's council              Appreciation and Recognition              Publication of a Scientific article within Clarivate Index Q2              The Renewable Energy Research Center participated in the Scientific Products Exhibition at the University of Baghdad.

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 Achievement
 

 

 Achievements of the Department

1. Laboratory experiments:

Insulation of electrical materials.

• Electrical conductivity of materials

• Account harmonics (change impact loads) in the electrical grid.

• Losses account for transformers and electrical motors.

• Evaluating the performance of electrical batteries.

• Cathodic protection using Impressed current (ICCP) for carbon steel.

• Calculate the mechanical and hydraulic variables (pressure drop - flow rate - speed - density) in the duct.

• Calculate the surface roughness and the thickness of the coating layer.

• Measuring function of pH and electrical conductivity.

2. Tests:

• Inspect electrical transformers.

• Inspect electrical cables.

 

• Checking breakers.

• Inspect the generator.

• Check grounding systems.

• Inspect electrical poles (physical and chemical).

• Check the batteries, check the inverter, and charger.

• Examining and evaluating the performance of the water stations.

• Chemical analysis of metals.

• Inspect insulation degree of materials.

• Measure the thickness of the coating layer.

• Examination of plastic pipes of all sizes.

• Mechanical tests (tensile, compression strength and hardness, etc.).

• Examination of the acidic function.

• Corrosion tests.

• Environmental impact assessment.

• Evaluation and design of air conditioning systems.

3.Pioneering research projects:

Pioneering project: “Experimental Investigation for the air solarcollector by using Aluminum cans”

Team members:

·        Dr. Salih Mohamed Salih

·        Assist teacher MoustafaAdilAbdulrahem

·        Assist teacher Osama Ibrahim Abd

 

Required Time: Six months as shown below.

·        Two months to design and fabricate the collector.

·        One month to determine and Install the devices of measurement.

·        Three months to study the numerous of  parameter for instance flow Rate, temperature distribution

The Beneficiaries:

·        University of Anbar / Renewable Energy Research Center.

·        Ministry of agriculture.

·        Ministry of Trade(Directorates Stores). 

 

Project Proposal:

The sun is approximately 1.4 million km in diameter and 150 million km from the earth. It is close to 5500°C at its surface and emits radiation at a rate of 3.8 × 1023kW. This power is supplied by nuclear fusion reactions near its core which are estimated to continue for several billion years. A tiny fraction of this energy is intercepted by the earth, but this amount is several thousand times larger than our rate of fossil fuel usage.

The main applications for solar air heater system (SAHs) are space heating, drying, Paint spraying operations, agricultural fields and other industrial applications. Numerous SAH devices have been developed and used experimentally. A glass or plastic cover is fixed above the absorber plate and the system is insulated thermally from the back and from the sides. SAHs are simple in design and maintenance. Corrosion and leakage problems are less severe compared with liquid heater solar systems. The main drawback of an SAH is that the heat-transfer coefficient between the absorber plate and the air stream is low, which results in a lower thermal efficiency of the heater. However, different modifications are suggested and will apply to improve the heat-transfer coefficient between the absorber plate and air. There are different factors affecting the SAH efficiency, e.g. collector length, collector depth, type of absorber plate, And quality transparent of glass, wind speed, etc. Increasing the absorber plate shape area will increase the heat transfer to the flowing air, but on the other hand, will increase the pressure drop in the collector; this increases the required power consumption to pump the air flow crossing the collector.

In this project, we will practically implement a solar dryer system by inserting an absorbing plate made of aluminum cans into a double-duct one pass with a circulation flat-plate solar air heater (SAH). This method will be expected to substantially improve the collector efficiency by increasing the fluid velocity and enhancing the heat-transfer coefficient between the absorber plate and air. These types of collectors will be designed as a proposal to use aluminum materials for building absorber plates of SAHs at a suitable cost. The collector will be covered with a single glass plate has thickness 4-mm, in order to reduce convective loses to the atmosphere. Three different absorber plates will be designed and tested for experimental study. In the first type (Type-I), cans will stagger as zigzag on absorber plate, while in (Type-II) they will be arranged indirect order. (Type-III)will be a flat plate (without cans). Experiments will be performed for air mass flow rates of 0.03 kg/s and 0.15 kg/s.

The comparison between the thermal efficiency of the SAHs that will be tested in this study with the ones reported in the literature had been presented. The expected temperature difference between inlet and outlet is around (8-15) degree, and it depends on the flow rate of air mass. The sun is approximately 1.4 million km in diameter and 150 million km from the earth. It is close to 5500°C at its surface and emits radiation at a rate of 3.8 × 1023 kW. This power is supplied by nuclear fusion reactions near its core which are estimated to continue for several billion years. A tiny fraction of this energy is intercepted by the earth, but this amount is several thousand times larger than our rate of fossil fuel usage and it drives all the natural ecosystem services of the planet.

The main applications for solar air heater system (SAHs) are space heating, drying, Paint spraying operations, agricultural fields and other industrial applications. Numerous SAH devices have been developed and used experimentally. A glass or plastic cover is fixed above the absorber plate and the system is insulated thermally from the back and from the sides. SAHs are simple in design and maintenance. Corrosion and leakage problems are less severe compared with liquid heater solar systems. The main drawback of an SAH is that the heat-transfer coefficient between the absorber plate and the air stream is low, which results in a lower thermal efficiency of the heater. However, different modifications are suggested and applied to improve the heat-transfer coefficient between the absorber plate and air. There are different factors affecting the SAH efficiency, e.g. collector length, collector depth, type of absorber plate, glass cover plate, wind speed, etc. Increasing the absorber plate shape area will increase the heat transfer to the flowing air, but on the other hand, will increase the pressure drop in the collector; this increases the required power consumption to pump the air flow crossing the collector.

In This project, we will practically implement a solar dryer system by inserting an absorbing plate made of aluminum cans into a double-duct one pass with a circulation flat-plate solar air heater (SAH). Thismethod willbe expectedto substantiallyimprove thecollector efficiency by increasing the fluid velocity and enhancing the heat-transfer coefficient between the absorber plate and air. These types of collectors will be designed as a proposal to use aluminum materials for building absorber plates of SAHs at a suitable cost. The collector will be covered with a single glass plate has thickness 4-mm, in order to reduce convective loses to the atmosphere. Three different absorber plates will be designed andtestedforexperimental study. In the first type (Type-I), cans will stagger as zigzag on absorber plate, while in (Type-II) they willbe arrangedindirect order. (Type-III)will be a flat plate (without cans). Experiments will be performed for air mass flow rates of 0.03 kg/s and 0.15 kg/s.

The comparison between the thermal efficiency of the SAHs that will be tested in this study with the ones reported in the literature had been presented. The expected temperaturedifference between inlet and outlet is around (8-15) degree, and it depends on the flow rate of air mass.

4.Undergraduate (Bachelor) students projects:

v Project/1: "Experimental Investigation for the air solar collector by using Aluminum cans"

Supervisor:Assist teacher MoustafaAdilAbdulrahem

Student:Hilal Tariq Aziz and Mahmoud MounirKhudair / Department of Mechanical Engineering.

Project Summary:

This project practically implement a device for inserting an absorbing plate made of aluminum cans into the double-pass channel in a flat-plate solar air heater (SAH). This method relies on essentially improvement the collector efficiency by increasing the fluid velocity and enhancing the heat-transfer coefficient between the absorber plate and air. These types of collectors had been designed as a proposal to use aluminum materials to build absorber plates of (SAHs) at a suitable cost and at least weight. Normally the collector are used with a 4-mm single glass plate, in order to reduce convective loses to the atmosphere.

Two different absorber plates had been designed and tested for experimental study. In the first type (type I), Absorber plate did not use cans (without cans), while in (Type II) they were arranged in order(longitudinal). Experiments had been performed at constant air mass flow rate about 0.095 kg/s.  Comparison between two models for multi parameter had been satisfied. For instance average temperature surface absorber plate, heat gain and thermal efficiency. The average increase efficiency between them about ten percent 50% for( type I) and 60% for (type II)  also the average air  temp difference between inlet air and out let air about (3-7) oC for (type1) and (4.5-9.5) oC for (type II)The good agreement with literature reported had been found.

 

v Project/2: "Effect of Heattreatment on Microstructure of Al-7%Si Alloy"

Supervisor:Assist teacher Osama IbrahmAbd

Student:Ahmed Mahmood Hussein/ Dep. of Mechanical Engineering.

Project Summary:

The aim of this project was to study the effect of heattreatment on the microstructure of Al-7%Si alloy cast by two casting techniques, and to evaluate the effect of the resulted cast microstructures on the response of the heattreatment.

Firstly, the Al-7%Si alloy was prepared and cast using cooling slope plate casting and gravity die casting (by metallic mould) and thus heat treated as follow:

·        Solution heat treatment at 540°C for 2 hours.

·        Solution heat treatment at 540°C for 2 hours + Quenching in hot water at 80°C + Artificial Ageing at 190°C for 2 hours.

The results of microstructural observations showed that casting by Cooling Slope Plate (CS) contributed in changing of the large dendrites of (α-Al) phase in GDC into fine and equiaxed crystals, the eutectic Si morphology is also modified and distributed uniformly around (α-Al) phase.

Solution heat treatment was sufficient to make full Mg2Si dissolution and alloy homogenization, with more homogeneity in CS microstructure in comparison with the other cast microstructure. The second heattreatment was sufficient to produce the coherent tiny strengthening precipitates of Mg2Si which are formed in the supersaturated solid solution and these precipitates act to prevent the dislocations motion and thus strengthen and harden the alloy, therefore, the increment in the hardness was obtained.

There was no major difference between the hardness values for the two casting techniques after heat treatment, therefore, both casting microstructures responded for heattreatment, with better value of aspect ratio for eutectic phase in state of cooling slope plate casting.

 

5. Published papers:

Dr.NawalEzat& Osama Ibrahim“Microstructure Investigation of Hypereutectic Al-Si Alloy Using Slope Plate Casting”, Engineering & Technology Journal,Vol. 31, No. 3A, 2013, ISSN:16816900,http://www.uotechnology.edu.iq,http://www.uotechnology.edu.iq/tec_magaz/2013/volum312013/No.03.A.2013/Text%20(9).pdf

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