Hasanain A. Abdul Wahhab

University of Technology-Iraq · Training and Workshops Center

Features of the tubular type of heat exchanger were examined experimentally in the current study. A rig is fitted with a novel insert as a negative heat transfer increase technique. The core fluid used is air under steady heat flux and a turbulent discharge state (6000 � Re � 19,500) conditions. Two heat transfer augmentation inserts are employed;...

Generally, photovoltaic panels convert solar energy into electricity using semiconductor materials in their manufacture by converting energy into electricity by absorbing heat from solar radiation, which requires reducing the heat of these panels to improve the efficiency of electricity generation. Therefore, the issue of cooling photovoltaic panel...

This paper presents the previous literature on the performance and emission behavior of compression ignition engines (CI) through the investment of biofuel and enhances combustion process by nano-additives. Biodiesel is a biofuel in liquid state which can be obtained by chemical reactions from an alcohol with vegetable oils or animal fats and with...

The use of fuel emulsification technology is a promising area of study as an alternative fuel for diesel engines. New investigations concluded with a significant decrease in the emissions of NOx, CO, and unburnt hydrocarbons (HC) with the operation of the diesel engine with water-diesel emulsion formulations. In this research a new kinds of emulsio...

This paper presents the previous literature on the performance and emissions behavior of compression ignition engines (CI) through the investment of water and fuel emulsions. Diesel engines (CI) are the most widely used internal combustion engines for their high efficiency, as they are characterized by the spread of millions of them within commerci...

Active heat transfer enhancement by inserts is attributed to imposed turbulence in the pipe flow. This work describes a numerical and experimental analysis to study the effect of twisted tape inserts as turbulence promoters to enhance heat transfer inside a circular tube heated with a constant heat flux. An experimental setup has been manufactured,...

Blow-off limits for a premixed turbulent flame are influenced by swirl flow pattern. The objective of the current paper is to present experimental investigations and numerical simulation for identifying and evaluating the influence of changing the swirl intensity by increasing the mixture flow rate on the blow-off limits at different equivalence ra...

In spite of widely investigated and reported determination of frictional losses due to turbulent pipe flow, it is still demonstrating inconsistency. This work is presenting comparisons of estimated frictional losses results in study turbulent pipe flow as measured experimentally, estimated by empirical relations and predicted numerically. The Wilso...

Size of burner nozzle is influencing the quenching of premixed flame. This paper describes an experimental study of quenching of premixed counter flame. Flames of Methane, Propane, LPG with air mixtures propagating in counter burner of a different nozzles’ diameter have been experimentally investigated. Influence of counter burner nozzles diameters...

In the present experimental work, the energy and exergy for single slope passive solar still with different basin water depths are experimentally investigated under the Baghdad climate condition. The analysis is performed using the governing equations formulated according to the first and second laws of thermodynamics. Compared to solar still with...

In the present study, the magneto hydrodynamic (MHD) was applied to the motion analysis of compressed natural gas (CNG) bubbles in laminar diesel flow after enhancing the liquid fuel with iron oxide nanoparticles (Fe3O4) in a horizontal pipe using experimental and mathematical approaches. Two distinct techniques were adopted for the experimental me...

The common design of thermal power plants is fundamentally oriented towards achieving a high-process performance, with market demands necessitating enhanced operational stability as a result of ongoing global support for renewable energy sources. Indeed, dynamic simulation represents one useful and cost-effective choice for optimizing the flexibili...

The present work focuses on the development of a detailed dynamic model of an existing parabolic trough solar power plant (PTSPP) in Spain. This work is the first attempt to analyse the dynamic interaction of all parts, including solar field (SF), thermal storage system (TSS) and power block (PB), and describes the heat transfer fluid (HTF) and ste...

The aggressive growth of Eichhornia crassipes (Water Hyacinth) plants causes severe damage to the irrigation, environment, and waterway systems in Iraq. This study aims to produce, charac-terize, and test biofuel extracted from the Eichhornia crassipes plant in Iraq. The extracted biodiesel was mixed at 10%, 20%, and 40% with neat diesel to produce...

This paper presents and discusses a novel Computational Fluid Dynamics simulation of a solar air heater as part of the updraft air tower model for an electrical power generation. A solar air heater is built upon double transparent upper skin to capture the solar energy and create the greenhouse effect, which is forming hot air flow into power gener...

Agricultural waste products have huge energy content and have the potential to be harnessed to generate energy. This paper presents experimental investigation results on the biomass obtained from Malaysia's agricultural sector mixed with coal for combustion to generate power. A total of 7 different types of biomass samples have been considered, mai...

The urgent need to improve premixed combustion processes in industrial furnaces and boilers is a major challenge; to power-increasing and reduces emissions. Many studies investigated the flame structure influences from the local extinctions perspective for different fuels. But, the stability limits for a premixed counter flame haven’t been widely s...

The small closed space demand increase as a secondary station for commercial production. It leads to the need to improve these stations by enhancing proper self-ventilation and daylighting. The natural air ventilation system significantly works in small closed stations; this system can be improved using different thermal storage materials in the so...

Greenhouses are an ideal plant production environment, providing high quality products in all seasons of the year and removed from climatic influences such as wind, frost and rain. However, this type of farming involves costly construction, and it is necessary to consider using it in other aspects, in addition to agriculture. The purpose of the cur...

The idea of using water-in-Diesel (W/D) emulsion in recent studies as fuel for diesel engines is to reduce the emissions. The introduction of water into a diesel engine using W/D emulsion has a number of potential benefits and can be used as an alternative fuel. One of important factors to use this fuel was the distribution of water droplets in emu...

Recently, proper orthogonal decomposition (POD) technique has gained wide attractiveness as a powerful analysis tool in engine flows. The velocity vector fields resulted from high speed time-resolved particle image velocimetry (PIV) of the flow field inside an engine cylinder under steady-state conditions were investigated by proper orthogonal deco...

The volume of fluid model is used to simulate magneto-hydrodynamics (MHD) for CNG-Diesel bubbly flow through a horizontal pipe. The modelling is carried out in ANSYS environment and the simulation of liquid/gas bubbly flow used FLUENT MHD Module for solving and post processing the MHD bubbly flow problem. This study is divided into two models: in t...

This paper is presenting results obtained from experimental investigations on engine performance and emissions using diesel/biodiesel blended with nanoparticles and compare with pure diesel/biodiesel mixture. The effect of 10 PPM iron oxides (Fe3O4) nanoparticles additive to biodiesel and neat diesel fuels in terms of engine performance and emissio...

In this work, electromagnetic induction technique of measuring void fraction in liquid/gas fuel flow was utilized. In order to improve the electric properties of liquid fuel, an iron oxide Fe3O4 nano-particles at 3% was blended to enhance the liquid fuel magnetization. Experiments have been conducted for a wide range of liquid and gas superficial v...

This paper describes an analytical study of the magneto hydrodynamics of small CNG bubbles in laminar horizontal Diesel flow under the influence of a magnetic field. The investigation is based on experiments carried out to identify the effect of varying the magnetic field intensity on the trajectory, the formation of bubbles and their shape and vel...

This document reviews the history of previous attempts on the behaviour of performance and emissions of internal combustion engines (ICE) by invest fuel magnetization. Engine designers are currently confronting serious challenges related to the reduction of emissions in ICE by refining their fuel consumption and performance. In the past, numerous e...

This paper conducts an analytic study of the hydrodynamics of a small CNG bubbles in laminar horizontal Diesel flow under the influence of the magnetic field. Investigation based on experiments was carried out to identify the effects caused by varying the magnetic field intensity on the trajectory, the formation of bubbles and their shape and veloc...

In-cylinder air flow structures are known to strongly impact on the performance and combustion of internal combustion engines (ICE). Therefore the aim of this paper is to experimentally study an IC engine in-cylinder flow under steady-state conditions. Different methods can be used to characterize the in-cylinder flow which are optical engines and...

Numerical simulation of a single compressed natural gas bubble in diesel flow with effecting magnetic flux is presented in this paper. The three dimensional incompressible Navier-Stokes equations have been used to solve the Diesel and compressed natural gas laminar two phase flow in horizontal pipe. The simulation was carried out using COMSOL Multi...

Background and Objective: The gas hydrothermal behaviour is strongly influencing the engine performance. The flow behaviour may be modified through the unavoidable installation of a flow restrictions and modifiers into the intake and exhaust systems and consequently the engine performance is adversely altered. The objective of this study was to per...

Background and Objective: Using Natural gas (NG) for combustion process modification in compression ignition engines is considered to be a promising method due to its high volumetric efficiency, high thermal efficiency and low emissions. However, the Natural gas has a penalty in terms of how to be involved in a combustion process due its high auto-...

Horizontal bubbly flow is encountered in various gas and oil facilities and industrial systems. Bubbly flow is characterized by the ability to provide large interfacial areas for heat and mass transfer. Nonetheless, horizontal bubbly flow orientation has received less attention when compared to vertical bubbly flow. This paper presents development...

The pre-mixing Diesel-CNG was suggested to increase the air quantity inside the cylinder more than if a mixture of CNG-air is injected in the engine which may result is a rich mixture, directly. The objective of the present paper is to study the behavior of gas bubbles in the liquid fuels and the ways to control the bubbles sizes prior to injection...

_________________________________________________________________________________ ABSTRACT—The pre-mixing of Diesel and CNG has been suggested to improve the quality of the injected fuel in the cylinder more than if a mixture of CNG-air is injected in the cylinder, directly. The nature of the pre-mixed Diesel and CNG is gas-liquid bubbly flow. The...

Diesel engines performance can be improved by adding combustible gases to the liquid diesel. In this paper, the propagation of a two phase flow liquid-gas fuel mixture into a pre-mixer is investigated numerically by computational fluid dynamics simulation. CNG was injected into the diesel within a cylindrical conduit operates as pre-mixer. Four inj...