Naseer T. Alwan

• Doctor of Philosophy
• Northern Technical University

In this paper, a comparative analysis of the most popular metaheuristic optimization algorithms used for maximum power point tracking (MPPT) in the case of partial shading conditions (PSC) is carried out. The algorithms include Particle Swarm Optimization (PSO), improved Grey Wolf Optimizer (IGWO), Firefly Algorithm (FA), Salp Swarm Algorithm (SSA)...

In the quest for sustainable construction solutions, this study explores the thermal insulation potential of sawdust as an eco-friendly material for building applications in hot-arid climates, with a focus on Iraq. The research evaluates the thermal behavior of sawdust when mixed with clay and glue, forming two different composite insulation materi...

Drinking water requirements are rapidly increasing while the availability of drinking water is decreasing. Overcoming this problem requires a sustainable energy source, such as solar energy, to desalinate untreated water. The most essential and simplest application of brackish water desalination is solar distillation. However, a limitation of the w...

The aim of the work is to develop a mathematical model which has capability to analyses the design parameters as a function of operations conditions for single and multi-stage Joule Thomson Cryocooler System JTCS. The operations conditions are inlet and outlet pressure, precooling temperature, and mass flow rate. The design parameters are expansion...

Recently, an increase in the demand for evacuated tube solar water heaters has been observed in Iraq due to their acceptable thermal efficiency, which reduces the dependence on electrical energy to heat water for domestic uses. The efficiency of the evacuated tube increases with the amount of received solar radiation. Therefore, in the present work...

In this research, the design of a low-cost modified anaerobic digester that contributes to improving biogas production in cold winter climates has been investigated. A laboratory biogas production plant consists of two anaerobic fermentation systems has been constricted, the first is conventional and the other is modified. Tests and measurements we...

This article discusses in detail the adiabatic models investigations of alpha Stirling engine with study the influence of performance factors; adiabatic analysis is a crucially effective method because it is close to the real and practical engines when compared to isothermal analysis. The numerical model was created using MATLAB software, an extrem...

The transportation sector is the main consumer for liquid fuel in many countries, fuel quality is the main indicator for efficient engine operation. Hence, the current study aims to investigate the utilization of Methyl Tert-Butyl Ether (MTBE) as an octane booster with local low octane gasoline at an addition ratio of 5%, 10%, and 15% on a volume b...

Stirling engine is type of external combustion engines, closed and cyclic that operates on the Stirling cycle. This paper presents a theatrical thermodynamic investigation to compare between Stirling engine major types (alpha, beta, gamma) with ideal isothermal model based on Schmidt analysis, air as the working fluid was tested. The impact of hot...

Grid-connected photovoltaic (PV) micro-inverters that do not require batteries are becoming increasingly popular in the market. The main issues with this type of inverter are its cost of components, such as the DC/DC converter unit, the number of sensors, and the number of switches. Accordingly, a single-stage flyback PV micro-inverter (FBPVMI) top...

This article offers a flatness theory-based energy management strategy (FEMS) for a hybrid power system consisting of a supercapacitor (SC) and lithium-ion battery. The proposed FEMS intends to allocate the power reference for the DC/DC converters of both the battery and SC while attaining higher efficiency and stable DC bus voltage. First, the ent...

Solar photovoltaic (PV) energy is currently among the most utilized energies within the renewable energy (RE) industry for the generation of electricity. The technology which is used in converting the solar radiation into electrical power however has some demerits, one of which is its dependence on its operating temperature i.e., it's performance d...

Fuel additives from waste have been suggested to enhance low octane commercial gasoline in this study. Four samples were prepared in addition to pure commercial gasoline and denoted as GF0, GF4, GF8, GF12, and GF 16 which refer to fusel oil addition ratio of 0%, 4%, 8%, 12, and 16% respectively. Engine speed was controlled and increased manually fr...

As is already known, solar photovoltaic (PV) technology is a widely accepted technology for power generation worldwide. However, it is scientifically proven that its power output decreases with an increase in the temperature of the PV module. Such an important issue is controlled by adopting a number of cooling mechanisms for the PV module. The pre...

Renewable energy resources for electrical generation are normally free but are not continuously available due to their sporadic availability. Thus, hybrid connections of various kinds of energy are made to increase utilization of renew-able energy. This paper involves a design of a hybrid renewable energy system employing maximum power point tracki...

Impacts of blending fusel oil with gasoline on fuel combustion have been investigated experimentally in the current research to evaluate engine performance improvement and exhaust emission. Tested fuel include F10, F20 (10% and 20% of fusel oil by volume) and pure gasoline as baseline fuel have been used to operate 4-cylinder SI engine at increasin...

The direct-current (DC) motor has been widely utilized in many industrial applications, such as a multi-motor system, due to its excellent speed control features regardless of its greater maintenance costs. A synchronous regulator is utilized to verify the response of the speed control. The motor speed can be improved utilizing artificial intellige...

This study aims to evaluate the performance of a flat plate solar water heater (SWH) theoretically and experimentally. The thermal performance of the SWH was predicted using Fortran 90 programming language. SWH was designed as a square shape with dimensions of 110 cm length, 120 cm width, and 10 cm depth, and tested by integrating with a modified s...

The purpose of the study is to evaluate the thermal performance of the gas turbine unit represented by (K3) under actual weather conditions by applying the first and second laws of thermodynamics, the design production of the unit (283.6 MW) at standard conditions (1 bar) and temperature (15) Celsius, which included the analysis of the unit energy...

This study aims to evaluate the performance of a flat plate solar water heater (SWH) theoretically and experimentally. The thermal performance of the SWH was predicted using Fortran 90 programming language. SWH was designed as a square shape with dimensions of 110 cm length, 120 cm width, and 10 cm depth, and tested by integrating with a modified s...

The purpose of the study is to evaluate the thermal performance of the gas turbine unit represented by (K3) under actual weather conditions by applying the first and second laws of thermodynamics, the design production of the unit (283.6 MW) at standard conditions (1 bar) and temperature (15) Celsius, which included the analysis of the unit energy...

The target of the current study was to review and analyze the research activities of previous studies on cooling techniques for thermal photovoltaic (PV) systems using phase-change materials. These materials have the ability to absorb and release certain amounts of potential heat energy by changing their state from phase to phase (solid–liquid) wit...

In this paper, an experimental investigation study was conducted to show the effect of enhancing the evaporation and condensation processes inside a modified solar still by placing ultrasonic humidifiers inside a cotton mesh tent in the basin water and by installing a cooling chamber with thermoelectric elements on top of the solar still. Various p...

Solar distillation is an important technology to get potable water from saltwater using clean and free solar energy. In the current study, an experimental and theoretical investigation of a single-slope traditional solar still was carried out, and the freshwater productivity and thermal efficiency were evaluated for four typical days (19/06, 17/07,...

The solar parabolic dish water heater is highly efficient but has limited hours of work only when sunlight is perpendicular to its surface. Therefore, this work aims to continue the work of the solar parabolic dish in the daytime using a dual tracking system, depending on the geographic location of the system (longitude and latitude angles) and usi...

The linear variation of photovoltaic cells with its temperature could affect the performance of the module and also damage the PV material. In order to address this important issue, this study proposed a passive cooling mechanism using designed aluminum sheets mounted at the rear side of the PV module. According to the results, the average temperat...

Fuel quality is an important indicator for the suitability of alternative fuel for the utilization in internal combustion (IC) engines. In this paper, light naphtha and fusel oil have been introduced as fuel additives for local low octane gasoline to operate a spark ignition (SI) engine. Investigated fuel samples have been prepared based on volume...

Thermoelectric generators (TEGs) are devices that convert heat into electricity. This paper is about the design of a Maximum Power Point Tracking (MPPT) technique for a TEG module. The module is built using 204 TEGs connected in series. It is connected to the load through a DC/DC boost converter. The MPPT technique used in this work is the Interval...

One of the key impediments to the wide utilization of solar water desalination systems is limited production. Hence, this study aims at increasing the thermal performance of a single-slope solar still by increasing the surface area of evaporation and absorption exposed to sunlight. A hollow rotating cylinder was installed inside the still structure...

The low freshwater productivity of a conventional solar still is considered a challenge for researchers due to the high temperature of the glass cover or basin water depth. In current work, a newly designed solar still was suggested according to the climatic conditions of Yekaterinburg/Russia, which included an enhanced condensation and evaporation...

The electrical performance of a photovoltaic (PV) module is hugely affected by its temperature. This study proposed a passive cooling mechanism for the cooling of a PV panel. The proposed cooling system is made up of a combination of aluminum fins and paraffin wax integrated at the PV panel’s rear side. The average temperature for the cooled panel...

A photovoltaic (PV) module’s electrical efficiency depends on the operating temperature of the cell. Electrical efficiency reduces with increasing PV module temperature which is one of the drawbacks of this technology. This is due to the negative temperature coefficient of a PV module which decreases its voltage significantly while the current incr...

Solar photovoltaic (PV) energy is one of the most widely used renewable energy options around the world. However, its electrical efficiency drops with increasing PV module temperature, it is therefore necessary to find appropriate ways to improve the performance of the module under high temperature conditions. In this study we evaluated the impact...

In this work, a comparative study of the specific air consumption and water vapor emissions in combustion products was performed based on the analysis of stoichiometric equations for air oxidation reactions both of energy fuels (petrol, diesel fuel, gaseous fuel, wood) and synthetic fuels converted from biomass and coal fuels (ethanol, methanol, et...

Solar water distillation is an effective technology for producing potable water using sustainable energy sources. However, the widespread use of this technology in industrial and domestic applications is hindered by low daily production compared to other methods. In this study, a new modification was introduced by placing a hollow cylinder inside a...

This work investigates and compares the yield of distillate water and economic feasibility of two types of solar stills, namely the conventional solar still (CSS) and the suggested solar still (SSS). Both the solar stills (CSS and MSS) were identical in dimensions and under the same operating conditions to facilitate comparison of the thermal perfo...

Current experimental work studies the thermal performance of a flat plate solar water collector according to the weather conditions of the city of Ekaterinburg in Russia. All tests were carried within four months and four typical clear days were chosen for each month. Thermal efficiency, useful energy, and water temperatures at the inlet and outlet...

Electromechanical solar tracker system for a parabolic dish with CPU water heater Milia H. Majeed a, Naseer T. Alwan a, b, S Е Shchekleina, A. V. Matveeva aUral Federal University named after the first President of Russia B. N. Yeltsin19 Mira St., Yekaterinburg 620002, Russia bKirkuk Technical College, Northern Technical University, 36001 Kirkuk, I...

The limited productivity of conventional solar distillation system is one of the most prominent obstacles that engage researchers to seek for solving using various technologies. Though many technologies suggested to enhance the rate of freshwater production, most of them are expensive and require special equipment for implementation. Therefore, the...

The solar still's productivity affected by various conditions such as design, operational and environmental conditions. The current study aims to investigate the effect of water depth on the suggested solar still productivity. The results showed that the productivity decreased with increasing the basin water depth from 1 cm to 3 cm, and the higher...

This work investigates the effects of water depth on the internal heat transfer coefficients and productivity of a solar distiller with a single slope in the summer season. Three different days were considered with three water depths of 1, 2, and 3 cm in the climatic conditions of Iraq. The results illustrate that the total heat transfer coefficien...

Water is the most important source for human being and other living creatures. The naturul sources of water started to decline especially in the recent years. Researchers have fo-cused on the productivity of drinking water as one of the main live requirements. Conversion of salt water into drinking water using solar distillation technology can be c...

The main objective of the current study is to increase the productivity rate of conventional solar still by increasing the surface area of heat transfer in the evaporation section within solar still. Lightweight rotating hollow metal cylinder made of galvanized iron layer (0.06 cm thickness and diameter of 32 cm) with a length of 90 cm was used as...

Conversion of untreated water into drinking water using solar distillation technology can be considered as the most viable methods in the dry climate regions and remote areas. The productivity of solar stills influences by various conditions such as design, operational and environmental conditions. The current paper includes a practical investigati...

The limited productivity of traditional solar still considers as one of the most prominent obstacles to their implementation. Thus, the main objective of this study is to improve traditional solar still (TSS) productivity in two successive stages. In the first stage, a rotating hollow cylinder is used within the solar still to increase the surface...

One of the most effective methods of solar water desalination without energy exhaustion is the use of thermal energy storage materials such as paraffin wax (PCM). These materials have been approved as one of the most acceptable alternatives for energy supply in distillation plants. These materials (sensible and latent) are used in the solar still t...

In this experimental study a test was carried out on a paraffin wax-copper (PWC) thermal property, which consists of a phase change material with 10% copper powder. The PCW with rectangular shape (25cm× 25cm×30cm) size is supplied with heater within it, and installed inside an isolated tank case, which allows the water to flow over the PWC from inl...

This research is the extension of the research (Studying the thermal performance of a Geothermal heat exchanger placed underground in Kirkuk city) [1] and was done to be compared with a result of the same research was conducted in the south of Iraq [2] to explore the differences in reading the temperature of the groundwater Because the soil in the...

We present the results of an experimental study of cooling systems on the basis of the finned heat pipes by applying a system of spherical recesses/projections at the ribs. The possibility of reducing the total thermal resistance of the cooling systems by 20–40% is presented in the entire range of studied thermal loads. Recommendations for rational...