Papers by Adel Abdel Dayem
Cleaner Engineering and Technology, 2022
Applied Mechanics and Materials, 2015
A vertical takeoff and landing aircraft (VTOL) like a helicopter has come to be used in environme... more A vertical takeoff and landing aircraft (VTOL) like a helicopter has come to be used in environmental investigations and inspections at dangerous places. However, there is a possibility that the VTOL like a helicopter crash if the rotor stopped. Then, computational simulation in the case that a six-rotor craft can safely continue to fly even though one of six rotors stop was carried out. Then the experimental six-rotor craft was developed and the validity of our control method was examined by the flying experiment.
Desalination and Water Treatment, 2010
A controlled flow solar thermal disinfection system was manufactured, tested and numerically inve... more A controlled flow solar thermal disinfection system was manufactured, tested and numerically investigated. The system is simply constructed of a 2.34 m² flat-plate solar collector at which the outlet flow temperature is controlled by a solenoid valve to a disinfection temperature. The outlet hot disinfected water is used to preheat the inlet untreated water through a heat exchanger. Different disinfection temperatures are considered with their corresponding heating periods of time. The system is numerically simulated to investigate their annual performance and life cycle savings. The simulation model is validated by measured data with close agreement. It is obtained that the considered simple system working at 60°C disinfection temperature can daily produce 171 l of clean water by m 2 of solar collector where it reduces into about 39 l/m² at 90°C. That corresponds to 81.5 and 1.1 l/m² per kWh of incident solar radiation respectively. The disinfected liter of water can cost about US$ 0.00001 along the system lifetime.
Sustainable Energy Technologies and Assessments, 2022
High solar radiation and ambient temperature, and large desert in Egypt are excellent conditions ... more High solar radiation and ambient temperature, and large desert in Egypt are excellent conditions to install efficiently solar chimney power plants there. Therefore this research aimed to develop a validated mathematical model and governing equations of solar chimney. It is proposed to improve the performance of solar chimney under effects of various parameters, and study of possibility of installing solar chimney in Egypt. The mathematical simulation of the solar chimney has been developed including all its performance parameters, dimensions (of collector, chimney and turbine) and the metrological data; which were considered as inputs of the simulation program. A comparison between the mathematical and experimental performance has been investigated to validate the mathematical simulation. The mathematical model has been used to predict the performance of the solar chimney power plant over a year in Egypt. It is used to study of effects of geometrical parameters, and investigate possibility of the optimum geometrical dimensions. It is obtained that there is in fact no optimum physical size for such plants without considering the economical constraints. The chimney height has a significant effect in the chimney performance. Visualizing of annual performance of the solar chimney would seem to be essentially a power generator in Egypt if it installed in a large scale.
Combined cycle power plant has the highest efficiency due to recovery heat efficient use. Utilizi... more Combined cycle power plant has the highest efficiency due to recovery heat efficient use. Utilizing solar heating of parabolic troughs can improve the overall efficiency of such plants. Different plants of such technology were successfully installed around the world and one of these plants is the Kurymat plant, which was recently installed south Cairo, Egypt. In the plant the exit flue gases from a gas turbine is used to produce superheated steam into a steam turbine without any supplementary firing. The gas- turbine always works in full load where the steam cycle power is maximized during the day when the solar field performance is maximized. Parabolic trough solar collectors are used to generate the steam during the day time, where the steam mass flow rate is controlled to improve the power produced. A detailed performance model of the integrated combined cycle of Kuraymat plant is created in TRNSYS simulation environment. A numerical simulation of the plant was established and it...
An innovative solar desalination system is successfully designed, manufactured and experimentally... more An innovative solar desalination system is successfully designed, manufactured and experimentally tested at Makkah, 21.4 oN. The system consists of 1.15 m flat-plate collector as a heat source and a desalination unit. The unit is about 400 liter vertical cylindrical insulated tank. It includes storage, evaporator and condenser of hot salt-water that is fed from the collector. The heated water in the collector is raised naturally to the unit bottom at which it is used as storage. A high pressure pump is used to inject the water vertically up through 1-mm three nozzles inside the unit. The hot salt-water is atomized inside the unit where the produced vapor is condensed on the inner surfaces of the unit outer walls to outside. The system was experimentally tested under different weather conditions. It is obtained that the system can produce about 9 liter a day per quadratic meter of collector surface area. By that it can produce about 1.6 liters per kWh of solar energy. Moreover the wa...
Energy Science and …, 2011
... 49 AA Mostafa 1 MF Sedrak 1 Adel M. Abdel Dayem 1,* Performance of a Solar Chimney Under Egyp... more ... 49 AA Mostafa 1 MF Sedrak 1 Adel M. Abdel Dayem 1,* Performance of a Solar Chimney Under Egyptian Weather Conditions: ... Page 2. A. Mostafa; M. F. Sedrak; Adel M. Abdel Dayem / Energy Science and Technology Vol.1 No.1 2011 50 Nomenclature A Area, [m2] ...
International Journal of Heat and Technology
A case study of designing of a reverse osmosis (RO) desalination plant using a Solar Photovoltaic... more A case study of designing of a reverse osmosis (RO) desalination plant using a Solar Photovoltaic (PV) system is investigated in this work. The RO system is a desalination plant providing pure water to the Shoiaba power generation plant. The system consists of a PV array connected to an inverter for day time or batteries for night time. The PV is designed to meet the high-pressure pumps’ load that is about 13649 kWh a day. Because the plant is operated 24 hours a day the PV panels are divided into two parts, one to cover the day time load and the second to cover night load that is stored in batteries. Based on weather conditions of solar radiation of the shortest day and maximum ambient temperature the PV is sizing and a storage system is determined. The system is modeled by the TNSYS software to simulate the performance of the system during the year. The annual performance of system proves that the system is able to meet the required load during the year. It can be concluded that i...
International Conference on Aerospace Sciences and Aviation Technology
In this work, an electrolyze system is considered to produce Hydrogen (H 2) using photovoltaic (P... more In this work, an electrolyze system is considered to produce Hydrogen (H 2) using photovoltaic (PV) panels. The system was experimentally installed and tested under the weather conditions of Cairo. Many PV modules with different specifications of current and voltage were tested for individual loads. One of PV modules that have the maximum current with minimum voltage can produce the highest amount of Hydrogen. In addition, the parameters of (KOH) concentration in water and the apart-distance between the electrodes were studied. The apart-distance of 5 cm between the electrodes was found as optimized distance that produces more H 2 quantity. Moreover, a H 2-cell of 20×15×13 cm 3 has higher H 2 production than the size of 6×6×24 cm 3 , 24×6×24 cm 3 and 24×24×24 cm 3 cells. It is obtained that the optimal system that considers the above efficient conditions must have a PV module with high current and small voltage.
International Journal of Energy Research, 2016
Energy Science and Technology, Mar 1, 2011
A pioneer system of solar water desalination was constructed, tested and numerically simulated fo... more A pioneer system of solar water desalination was constructed, tested and numerically simulated for moderate latitudes, Cairo 30 °N. The humidification/dehumidification (HD) process is considered in this system. The salt water is heated by either solar energy or/and auxiliary heater before injection inside an insulated desalination chamber using an air atomizer. The air is supplied into a condenser by a 0.4 kW blower and later on it pulls hot salt water up through the atomizer from an insulated tank. By this idea the air is preheated inside the condenser and is used as a water pump. The flashing water is evaporated and condensed simultaneously above the condenser surface. A 2.39 m 2 flat-plate solar collector is used to heat the salt water existed in an insulated tank. The tank opening is closed by the chamber one. By this way the salt water is circulated naturally inside the solar water heater where it is forced inside the desalination chamber. A numerical simulation of the considered system was developed and validated. It was provided a mathematical model of each system component. The system was successfully tested using either solar or/and auxiliary energies. It can produce about 36 liter daily of purified water where the using of solar energy alone can obtain about 12 liter on clear days. To visualize the heat and mass transfer inside the chamber temperature and humidity distribution were measured. The annual and monthly performance of the system is presented. In addition an empirical equation of the distilled water quantity is obtained versus the incident solar radiation. Moreover, economic study was provided and it is found that one liter of distilled water can cost about 0.2 US$ using the considered system.
Proceedings of ISES World Congress 2007 (Vol. I – Vol. V), 2008
Proceedings of ISES World Congress 2007 (Vol. I – Vol. V), 2008
Journal of Renewable and Sustainable Energy, 2012
Journal of Solar Energy Engineering, 2014
An innovative solar desalination system is successfully designed, manufactured, and experimentall... more An innovative solar desalination system is successfully designed, manufactured, and experimentally tested at Makkah, 21.4 degN. The system consists of 1.15 m2 flat-plate collector as a heat source and a desalination unit. The unit is about 400 l vertical cylindrical insulated tank. It includes storage, evaporator, and condenser of hot salt-water that is fed from the collector. The heated water in the collector is raised naturally to the unit bottom at which it is used as storage. A high pressure pump is used to inject the water vertically up through 1-mm three nozzles inside the unit. The hot salt-water is atomized inside the unit where the produced vapor is condensed on the inner surfaces of the unit outer walls to outside. The system was experimentally tested under different weather conditions. It is obtained that the system can produce about 9 l a day per quadratic meter of collector surface area. By that it can produce about 1.6 l/kWh of solar energy. Moreover, the water tempera...
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Papers by Adel Abdel Dayem