Research Title: Fast correction of voltage unbalance factor in three-phase power system using neural network

Author: Jasim Abdullah Ghaeb, Published Year: 2018

2018 11th International Symposium on Mechatronics and its Applications (ISMA), Sjarjah, UAE, United Arab Emirates

Faculty: Engineering and Technology

Abstract: The voltage unbalance at the load terminal of three-phase electric power system is discussed. The aim of this work is to solve the problem of voltage unbalance accurately and quickly by using the Neural Network Control (NNC). In this paper, the Aqaba-Qatrana-South Amman (AQSA) power system is considered and modelled as a real case study. The three RMS-Load Voltages (3RMSLV) and the Voltage Unbalance Factor (VUF) for different unbalance conditions are collected. In addition, the corresponding firing angles (FATCR) required to drive the Thyristor-Controlled-Reactor (TCR) compensator for balanced condition are determined. These data are used to train, validate, and test the NNC. The NNC training depends on the fact that each unbalance condition has its own 3RMSLV and VUF and needs a unique set of FATCR for getting back the balance condition. Several test cases were discussed to validate the capability of the proposed method in solving the voltage unbalance problem.

Keywords: Power Quality, Neutral Network, Reactive Compensation, TCR.

Research Title: Enhancing the Response of Thyristor-Controlled- Reactor Using Neural Network

Author: Jasim Abdullah Ghaeb, Published Year: 2019

International Transactions on Electrical Energy Systems, Wiley, doi.org/10.1002/2050

Faculty: Engineering and Technology

Abstract: In this paper, Neural Network controller is proposed to retrieve the voltage balancing conditions in three-phase power systems. The Neural Network is suggested to calculate the required set of firing angles for the Thyristor-Controlled-Reactor accurately to balance the three load voltages quickly. The proposed controller is fed by different parameters within different feeding techniques, namely, RMS values of the three load voltages, RMS value of the space vector signal calculated from the three load voltages, and the RMS values of both the three load voltages and their associated space vector. The intentions of the proposed techniques are to combine between reducing the number of measured parameters and providing the controller with qualitative data about system status. The influence of the measured parameters on the Neural Network performance is examined by calculating the regression coefficients through several test cases. Accordingly, only the effective parameters are utilized to reduce the Neural Network complexity and to enhance the controller response time. Additionally, the calculations of the controller input parameters are made in terms of space vector cycle, which is half of system sinusoidal cycle. Consequently, the calculation time is reduced significantly. The Aqaba-Qatrana-South Amman power system is considered and modelled as a real case study. In addition, several test cases have been conducted to test and validate the ability of the proposed Neural Network Controller in retrieving the voltage balance conditions precisely and quickly. The results have revealed the ability of the proposed Neural Network controller to calculate the firing angles quickly within 10 ms and achieve very low Voltage Unbalance Factor.

Keywords: Reactive Power Control; Thyristor-Controlled-Reactor; Power Quality; Neural Network.

Research Title: Current Situation and Future Trends

Author: Munzer Ebaid, Published Year: 2011

Int. J. on Recent Trends in Engineering and Technology, 6

Faculty: Engineering and Technology

Abstract: This paper presents the current energy and power situation in Jordan and the possible future options in terms of energy and power mix and the potentials, trends, and various scenarios to be adopted in the electrical power sector.

Keywords: energy and power, wind energy, solar energy, biomass, hydropower, geothermal, oilshale.

Research Title: The Effect of Multiple Conical Shockwaves at the Engine Intake on the Performance of a Single Mode Ram Jet

Author: Munzer Ebaid, Published Year: 2013

I. Mech. E., Journal of Aerospace Engineering, Part G, 228

Faculty: Engineering and Technology

Abstract: Supersonic single-mode ramjet performance was analyzed using a prescribed two-dimensional conical shock wave in axisymmetric supersonic flow. The ramjet under consideration for the analysis consists of a mixed compression intake, a cylindrical combustion chamber and a supersonic constant convergent–divergent nozzle. A computer program was developed to carry out the analysis based on the formation of multiple conical shock waves at the engine intake at different flight Mach numbers and different altitudes in the range of 1.5–4 Mach and 9000–18,000 m, respectively. Accordingly, a supersonic convergent–divergent nozzle was designed and consequently, the area ratios along the ramjet were calculated to find the correct dimensions for the thrust required. The analysis of the multi-shock system showed that for a given number of conical shocks and Mach numbers, the thrust decreases as the altitude increases. Also, the thrust increases at higher Mach numbers and higher number of conical shocks regardless of the altitude. Furthermore, for M>2.5, and at number of conical shocks greater than 2, thrust stays constant. The flow rate and the pressure after combustion showed similar trends as the thrust. The multi-shock system of the intake system proposed showed that a limit of a three conical shocks were sufficient for a reasonable pressure recovery for a M>2, while for a M<2, a single normal shock wave could be sufficient for different altitudes. Also, pressure recovery is unaffected by the altitude for the same Mach number and increases with lower Mach numbers. Moreover, the increase of number of conical shocks is limited to 3 where no further increase in pressure recovery could be indicated.

Keywords: ram jet, combustion, conical shock, intake, Mach number, flight altitude

Research Title: A Unified Approach for Designing a Photovoltaic Solar System for the Underground Water Pumping Well-34 at Disi Aquifer

Author: Munzer Ebaid, Published Year: 2013

Energy Conversion & Management, 75

Faculty: Engineering and Technology

Abstract: This paper aims to present a detailed design of a standalone photovoltaic system used to power continuously a submersible water pump from a selected well, (Well-34 of a current static water level, SWL=147.3 m), out of 55 production wells located at the Disi aquifer, where each of these wells should have a continuously-operating water flow rate of 80 liters/sec (288 m3/hour) according to the Disi project specifications. Initially, solar irradiation calculations on horizontal and tilted surfaces were carried out to identify the potential of solar energy available in kWh/m2 /day in the Disi aquifer. Then, a system design approach based on the worst month of the year (December) was carried out to choose and size the components of photovoltaic system that is required to operate the submersible pump over the 25-year operation period. The system sizing implies defining the number and type of solar panels required to capture the available solar energy, the capacity and number of batteries, inverter rating, cable sizing, charge controller numbers and rating to ensure the maximum reliability of the system. Furthermore, beyond the design conditions of the worst month (December), extra energy can be produced by the PV system during the rest of the year time, which can be used for many purposes. Also, the design process considers the problem of dust accumulation on PV surfaces and this can be dealt with by periodic cleaning.

Keywords: Photovoltaic panel, batteries, charge controller, inverter, solar irradiation, motor pump.

Research Title: A comprehensive study of photovoltaic power system application for the underground water well pumping at Disi area

Author: Munzer Ebaid, Published Year: 2013

Australian Journal of Basic and Applied sciences, 7

Faculty: Engineering and Technology

Abstract: The main purpose of this study was to investigate the possible use of solar photovoltaic system to power underground water well pumps, which are intended to be used at the Disi Water Conveyance Mega Project in south of Jordan. The work in this paper is divided into four parts: Firstly, an overview of the Disi area was studied and it was found that temperatures ranged between 43°-22°C, wind speed 5.6-9.1 m/s and a total of number sunny days reaching 330 days/year. These values formed ideal conditions for harvesting solar energy. Secondly, Irradiation levels were calculated (Pyranometer was not available on site) and found ranging between 5.5-8.7 kWh/m2/day. This case prevails throughout more than 330 days/year and with around 10-12 shinning hours/day. These values formed an ideal opportunity to construct a photovoltaic solar system. In addition to that, the method of the worst month of radiation and the peak sun hours were studied and analyzed. Thirdly, for this study purposes, system flow and head requirements of the selected four wells are to be determined, and finally the complete system was designed starting with the determination of water pumping requirements (continuous flow rate of 80 liters/sec per well) and then water drawdown effect on the required motor power was investigated throughout the 25-years of the study period. After that, the main photovoltaic PV components’ sizing and selection were conducted. This includes the PV panels, batteries, inverter, charge controllers and cables. The results of this study showed that application of solar energy in Disi area for underground water pumping system is practically and theoretically applicable.

Keywords: Photovoltaic panel; Irradiation levels; batteries; inverter; charge controller

Research Title: Green Building Design Solution for a Kindergarten in Amman

Author: Munzer Ebaid, Published Year: 2014

Energy and Buildings, 75

Faculty: Engineering and Technology

Abstract: Buildings in Jordan consume a significant amount of energy for heating, cooling and lighting purposes. Therefore, improving energy performance of the existing building in Jordan will significantly reduce national electrical consumption. In this work, an existed kindergarten in Amman was redesigned moving towards low energy performance, in doing so, the proposed design studied the use of applying lighting saving lamps, adding thermal insulation for walls, solar water heater for domestic hot water, on grid photovoltaic system as a source of electrical power to generate free solar electricity to cover the electrical load demand of the kindergarten, and finally a heat recovery system for the exhaust air in air conditioning and ventilation. Also, a suitable economic evaluation criterion was used to estimate the payback period of all systems applied. The results showed energy saving fluorescent lamps can reduce the energy use by about 15%, and reduce the heating load up to 10%, achieved by using thermal insulation and 61.3 % by using exhaust air heat recovery system. Furthermore, suitable energy conversion using solar systems were sufficient to cover the domestic hot water heating demand to reach zero of domestic hot water heating energy during sunshine days. The annual reduction achieved in Carbon Dioxide CO2) emission was 11.7 Ton.

Keywords: Green building, Energy consumption, photovoltaic, heating load, carbon emission

Research Title: Numerical investigation of fully developed laminar flow in irregular annular ducts: Triangular–circular combinations

Author: Munzer Ebaid, Published Year: 2014

Energy Conversion & Management, 85

Faculty: Engineering and Technology

Abstract: The aim of this study is to reduce the required pumping energy by obtaining accurately the friction factor – Reynolds number product (fRe) of the steady fully developed laminar flow in annular ducts. The study is focused on the annular region between equilateral triangular and circular ducts under all possible combinations. For this purpose, the governing equations are solved using high order finite element method. For regular annuli, it is found that higher values of area ratio lead to monotonic increase in (fRe) value, with (fRe)max = (24, 42.67,96) at the respective values of (Dh) = (0.5,0.75,1) regardless of the particular geometry. For irregular annuli, higher values of area ratio lead to an increase followed by a decrease in (fRe) value, with (fRe)max = (79.631,35.392,19.921) at the respective values of (Dh) = (0.5, 0.75, 1) for the (CT) case, and correspondingly (fRe)max = (91.02,40.45,22.85) for the (TC) case. On the other hand, it is found that (fRe) value inversely proportional with the hydraulic diameter (Dh). For all cases considered in this study, the largest (fRe) at the representative values (AR) = 30% is found for the (CC) case with (fRe)max = 95.43 whereas the smallest (fRe) is found for the (CT) case with (fRe)min = 17.544. More importantly, irregular annuli outperformed the regular annuli and thus are recommended to replace the classical regular annuli currently used in double duct heat exchangers. This in turn will significantly decrease the pumping energy required in such applications in industry.

Keywords: Pumping EnergyIrregular annuliAnnular ductsFinite element methodLaminar flowFriction factorHydraulic diameter

Research Title: Large scale Grid Connected (20MW) Photovoltaic System for Peak Load Shaving in Sahab Industrial District

Author: Munzer Ebaid, Published Year: 2014

”, Jordan Journal of Mechanical and Industrial Engineering JJMIE, 9

Faculty: Engineering and Technology

Abstract: In the daily electrical load cycle, peak load that last for few hours is the most expensive electrical production cost. In this current work, Sahab Industrial District, as an example, has its peak load occurring during the daylight hours. Therefore, it is suggested to install a PV plant to shave off the peak load. The location of the proposed PV generation system will be in the Al-Risha area because of the land low cost, and a link to the national grid is available. Large-scale grid-connected PV system is designed with 20 MW installed capacity. It is found that the generation cost for all power was found to be US$ 0.172 per kWh which is much lower than the electrical production cost of the peak load generation. In addition, a cost comparison is conducted between kWh generated from conventional units (gas turbine in this case) and that generated from PV system. The result of this work illustrated clearly that it is possible to use photovoltaic generation at large-scale for peak load shaving and could be generalized to other industrial districts, and to other load types such as Industrial, and economic loads.

Keywords: Peak load shaving, photovoltaic system, life cycle cost, net present value, on grid system

Research Title: “THE POSSIBILITY OF APPLYING QUALITY COSTS AND COMPETITION STRATEGIES APPROACH TO ACHIEVE COMPETITIVE ADVANTAGE OF PUBLIC SHAREHOLDING INDUSTRIAL COMPANIES IN JORDAN”

Author: Ali Ahmad Masadeh, Published Year: 2018

Global and Stochastic Analysis, 5

Faculty: Business

Abstract: This study aimed to identify the possibility of applying quality costs with its role in the developing and improving production processes to achieve the competitive advantage of public shareholding companies in Jordan, especially, under the rapid changes in the economic environment in field of design and production technology.Quality costs have become one of the most important strategic tools to enhance competitive advantage. To achieve the study objectives, a questionnaire was designed, and distributed to the managers of finance, production and sales by three questionnaires per company. 156 questionnaires were distributed for analysis. The study achieved the following results: The approach of quality costs play an important role in providing the information to implement the strategic and competitive steps of public shareholding companies in Jordan and that companies apply this competitive advantage strategies in medium and weak rates. This study has provide a set of suggestions and recommendations which is: the possibility of applying the approach of quality costs in companies through the following basic factors: the desire of the companies to apply this approach as well as the availability of basic skills to apply advanced systems and approach and the industrial management companies seeking to reduce damage costs as well as to reduce the startup time and that reflected positively on competitive advantage.

Keywords: Cost of Quality Approach, Competition Strategies, Competitive Advantages