
Emad M. S. El-SaidDamietta University | DU · Department of Mechanical Engineering
Emad M. S. El-Said
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About
110
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Introduction
Emad M. S. El-Said currently works at the Department of Mechanical Engineering, Damietta University. Emad does research in Desalination, Naval Engineering and Heat exchanger development. Their current project is 'Power generation from waves'.
Additional affiliations
October 2014 - April 2022
Publications
Publications (110)
In many regions in the world, the climate conditions are suitable for generating drinkable water; however, they have one or more types of water scarcity. An alternative method for fresh water recovery from atmosphere had been studied in this paper. The studied method is designed for Arabic Gulf countries or similar by using solar-based thermoelectr...
This paper reviews the current solar thermal desalination research activities with systems production in the range of 10–150 liter/day for remote or arid regions. A comparative study between different sustainable efforts in such solar thermal desalination systems as well as economics has been done. Throughout the review, the results indicated that...
Drinking water of acceptable quality has become a scarce commodity. The standard high-capacity desalination methods such as multi-stage flash evaporation and multi-effect evaporation, vapour compression and reverse osmosis are reliable in the range of about 100-500,000 m3/day fresh-water productions. However, the wide-scale implementations of these...
Water scarcity is a critical global challenge, prompting innovative solutions such as desalination technologies powered by renewable energy. This paper investigates the integration of Humidification-Dehumidification (HDH) technology with hybrid renewable energy sources like solar, wind, and geothermal to tackle water shortages sustainably. The stud...
This study introduces an experimental investigation of a novel direct trend evaporative cooler based on a ground-air heat exchanger (GAHE) using porous clay vessels as an evaporation media under a variety of operational conditions, including air flow rate, inlet air temperature, temperature of inlet water, and in air humidity. The evaluation of the...
This study focuses on optimizing the solar distiller and provides a foundation for future research and development in solar distillation technologies. This paper does an exergoeconomic analysis of a multi-section solar distiller (MS-SS) system that is combined with a solar air heater (SAH). Therefore, its objective is to determine the most effectiv...
In contemporary times, Helical tube heat exchangers (HTHXs) have gained significant prominence in energy-related sectors, frequently finding application in industrial and technical settings. Their impact on overall system efficiency and size is substantial. A comprehensive review addressing passive methods of heat transfer enhancement in HTHXs is n...
This research describes a hybrid solar desalination system that includes a humidification-dehumidification unit as well as a solar still unit. The current system is being studied numerically. A one-dimensional model of the important heat and mass exchanges, as well as the flow field, was built using the finite difference method. Freshwater producti...
A wide range of studies was conducted to increase the heat transfer rate and reduce the size and cost of shell and tube heat exchangers (STHE). The paper’s contributions lie in its ability to provide a comprehensive, up-to-date, and systematic overview of the various methods available for heat transfer enhancement in STHEs, making it an essential r...
A proposed hybrid desalination system is presented that combines a humidifier-dehumidifier with a solar distiller. The system is theoretically analyzed using the differential volume method, a one-dimensional theoretical model of heat and mass transfers and flow field has been developed. In the present study, the system components have been investig...
In this paper, an experimental study is performed to investigate the effect of utilizing an internal condenser (IC) on augmenting the performance of a hemicylindrical type solar still (HSS). The proposed SS body is divided by a metal basin into two chambers; the upper chamber for evaporation and the bottom for condensation and located on the under...
In this study, several unique tube configurations are designed and modeled to examine the thermal and hydraulic performance of a helical tube heat exchanger (HTHE) experimentally and numerically. For cold and hot side tube designs, the numerical investigation is completed using three-dimensional modeling, and the findings are confirmed using experi...
This work performed the using of the metal wire mesh to enhance the SS performance. • The utilization of a wire mesh increases the absorptive surface area over the traditional absorber. • The water yield is enhanced by about 102 % by using the small size of wire mesh. • The average thermal and exergy efficiencies, and cost are about 45 %, 1.1 %, an...
Here we present a new compact design of a vertical water distillation tower based on solar stills. The experimental setup consisted of a vertical tower with five water trays, supported by a metal duct and surrounded by a glass enclosure. The water yield and thermal, exergic, and economic features of the tower were investigated and analyzed. A new p...
The performance of a hybrid solar desalination system is predicted in this work using an enhanced prediction method based on a supervised machine-learning algorithm. A humidification–dehumidification (HDH) unit and a single-stage flashing evaporation (SSF) unit make up the hybrid solar desalination system. The Al-Biruni Earth Radius (BER) and Parti...
A numerical investigation for a solar air heater integrated with a multi-section solar distiller has been conducted with a novel design of solar distiller with interior sections. A mathematical description of the solar distiller is made and solved with a MATLAB code. The air flow in the solar air heater, the water height in the solar distiller, and...
Recently, the scientific community has become more interested in solar-driven steam materials and systems for desalination and disinfection. Solar thermal energy for membrane distillation desalination provides a green and sustainable option for building settings where there is a strong connection between water constraint and high solar irradiation....
Numerical investigation for different hybrid solar desalination system configurations have been conducted. The most important effective arrangement variables and operating parameters are depicted to conduct system and economic analyses, thereby achieving the lowest water production costs and the highest performance. The main comparative parameters...
In the current study, an experimental investigation of a hybrid-solar desalination system consisting of humidification–dehumidification unit and a solar distiller (HDH-SD) with exergoeconomic modelling was conducted. Experimental work was performed under outdoor environmental conditions in September 2021. The present work introduces a new humidifier...
This paper deals with the investigations on entropy generation around a circular plain tube with integral downstream splitter plates with cross flow of air in a rectangular duct. This study is carried out in the Reynolds number range 49 × 10³ to 227 × 10³ on single plain cylinder and single cylinder of various splitter length-to-tube diameter ratio...
Experimental investigation of a hybrid-solar desalination system consisting of a humidification–dehumidification unit and a solar distiller unit. At El Mahalah city- Egypt in climatic conditions, experimental work was performed under real thermal conditions in September 2021. A new design of helical humidifier and multi-section solar distiller has be...
This study presents a numerical modeling of a shell and tube heat exchanger to analyze six various baffle configurations for increasing the thermal parameters performance and hydraulic parameters performance. The baffle configurations include conventional single segmental (CSS), staggered single segmental (SSS), Flower segmental (FS), hybrid segmen...
This study investigates the thermohydraulic characteristics of immiscible two-phase downward flow and heat transfer through porous media in a vertical, cylindrical, and homogeneous porous medium numerically and experimentally. The test section is exposed to a constant wall temperature after filled with spherical beads. Numerical solution of the mod...
In this work, the thermal performance of a single slop solar still (SS) using a high-frequency ultrasound waves atomizer (HFUWA) as a humidifier was predicted through developing an artificial intelligence model. To minimize or avoid mathematical analysis or performing costly experimental work, a set of machine-learning (ML) algorithms were performe...
The present research work aims at providing data on heat transfer by forced convection from three-dimensional bodies suspended in a free stream of air. The shapes investigated covered cubic and rectangular bodies with air flow parallel and normal to the body’s axis. The experiments were carried out inside an air duct in which air flows over a model...
In this research, a tubular swirl-flow solar air heater (SF-SAH) with a find semi- cylindrical absorber plate is adopted to enhance its thermohydraulic performance. The proposed SF-SAH is tested with two types of fins: radial and longitudinal. Three sets of fins; 3, 4, and 5 number of fins are tested. Data obtained from the proposed SF-SAH are comp...
The current research presents an experimental study on heat transfer and fluid flow characteristics of a helical plate heat exchanger (HP-HEx). Helical plate with different pitches and cross sectional area of the flow channel was investigated for various fluid mass flow rates and inlet temperatures. The results show that the proposed heat exchanger...
A macroscopic-scale Darcy's equation is applicable for both single-phase and multi-phase flow through classical porous materials with a porosity of 0-100% at a low Reynolds number. However, it has more than restrictions at high Reynolds number flow therefore, it cannot be applied in these conditions. The fundamental Darcy’s law assumes no inertial...
Today artificial intelligence is a major utility technology that can help industry and research in many fields, including solar thermal energy for water desalination purposes. Hence, the main aim of the paper focus on utilizing an artificial intelligent regression model to predict the efficiency of water desalination, which depends on solar thermal...
Freshwater shortage refers to the ongoing depletion of available water resources. The World Economic Forum identified this issue as the most significant global risk affecting all continents based on its potential impact over the next decade. According to the United Nations (UN) world review, up to 40% of the population will be impacted by freshwate...
The integration of solar water desalination utilizing humidification dehumidification (HDH) techniques with a cooling system (CS) and hot air flow rate was investigated experimentally during Sept and Oct. 2020 under Egypt's Suez governorate's climate located at 29.9669°N, 32.5499°E. The system performance at various air flow rates, water basin heig...
Solar distillation of saline water can be economical by combining the advantages of free-cost solar energy with effective design. A combination of two or more desalination processes is called hybrid desalination. It may provide a better cost-effective pure water yield and optimize energy consumption and pure water production. An optimum combination...
In this research, a double pass solar air heater with a corrugated absorber plate and built-in external reflector is adopted to improve its thermo-hydraulic performance. The proposed solar air heater is tested with four tilt angles: 0°, 5°, 10°, 15° and 20°. Data obtained from the proposed heater are compared with the conventional design without re...
This study presents an experimental investigation to assess the heat and mass transfer process characteristics of porous carbon tubes as a humidification medium with swirl flow. The aim is building an eco-friendly self-cooling system that relies on the evaporation process of absorbed water. Heat and mass transfer processes are tested at various air...
The current work aimed to enlarge freshwater production and improve tubular solar still (TSS) performance via pure and nano-coated (with carbon black nanoparticles) mushrooms. Pure mushrooms were used due to their structure that allows effective vapor generation through achieving good solar absorptivity, capillary effect, and heat localization on t...
An experimental investigation on the solar desalination system was conducted according to humidification dehumidification methodology hybrid with hot air stream flow and vapor compression cycle as a condensation unit. A high-frequency ultrasonic atomizer (HFUA) was used as a humidifier which rapidly reaches 100% Relative Humidity. The tests were do...
In the current investigation, heat, flow characteristics, and exergy analysis of hybrid and single nanoparticles-based water passing through a triple ribbed tube heat exchanger (TRTHE) under several design and operation parameters are studied. A computational fluid dynamics (CFD) modeling is carried out using ANSYS-FLUENT 19 code while the validati...
The environmental pollution and growing energy demand necessitate the development of power generation using renewable energy systems, especially solar photovoltaic (PV) panels. Despite being an eco-friendly and durable power generation technology, PVs demerit for low conversion efficiency (15–20%). In other meaning, a very low amount of the inciden...
When distilling water using a solar still, utilization of a circular parabolic absorber increases the absorber surface area over the flat absorber. It enables a solar energy tracking system, which increases the solar heat gained and the evaporation rate inside the distillation cavity with a compact design. The recent research describes an experimen...
Herein, five alternative combinations were applied on and under the still basin to enhance tubular solar still performance. Firstly, using a v-corrugated aluminum basin. Secondly, adding wick material to the v-corrugated aluminum basin. Thirdly, adding carbon black (CB) nanofluid on wick material located on the v-corrugated aluminum basin (heat loc...
The solar desalination system is experimentally investigated according to humidification dehumidification methodology (HDH) with hot air stream flow and heat pump as a condensation unit. The effects of high frequency ultrasound atomizer number, water height and hot air stream flow rate on distillate yield are studied. The results illustrated that i...
In this paper a numerical investigation on shell-and-tube heat exchanger (STHE) with three configurations of novel segmental curved baffles (convex core baffles/convex peripheral baffles (CB1), convex peripheral baffles/ convex core baffles (CB2), and convex peripheral baffles/concave core baffles (CB3)) for thermohydralic performance analysis and...
This research deals with an experimental investigation to manage the thermo-hydraulic performance of the heat sink with pin fin array under forced convection at various design factors and operating conditions. Experimentation tests were performed on two pin fin section shapes of a square and hexagonal with four various twist angles (0, 30, 60, and...
In this work, an experimental study on energy saving for air conditioning application has been conducted. Heat Pipe Heat Exchanger (HPHX) was installed between the fresh air and return air streams to cool the fresh air before entering the air handing unit. Three test sections of wickless HPHX of different pipe diameters were tested. The studied tes...
This study investigates the thermal-hydraulic characteristics of immiscible two-phase flow (gas/liquid) and heat transfer through porous media. This research topic is interested among others in trickle bed reactors, the reservoirs production of oil, and the science of the earth. Characteristics of two-phase concurrent flow with heat transfer throug...
In this study, improved prediction methods based on supervised machine-learning algorithms is proposed to predict the effect of the application of air injection and transverse baffles into shell and tube heat exchanger on the thermohydraulic performance. The injection process is accomplished by injecting air into the shell with different flow rates...
In this study, an experimental investigation is carried out to assess solar still (SS) performance with a porous absorber made from activated carbon tubes (RACT) with four various arrangements based on energy, exergy, economic, environmental, exergoeconomic (EXC), enviroeconomic (ENC), exergoenvironmental (EXE), and exergoenviroeconomic (EEC) point...
Recently, air bubbles injection with utilizing insets inside the tubes for enhancing heat transfer performance in shell and tube heat exchanger STHEs has achieved a great interest. In this study, air was injected by the simple method in tube sides where wired nails-circular rod inserts (WNCR) are presented with water tube side flow rate TSFR change...
The direct contact condensation, induced water hammer (CIWH) or pressurized thermal shock (PTS) in stratified liquid–vapor systems is an essential reason for many serious accidents in different applications such as the explosion occurred in the boiler room of a food processing plant and destructive vibrations acting on the structures, pipes, fittin...
In this article, an improved double‐pass solar air heater with multiple curved perforated baffles is proposed; the solar air heater can enhance the heat transfer between air and heat absorber plate sufficiently by using a perforated baffles. At the same time, to reduce the flow resistance of air, a curved shape was created on the baffles. This rese...
Desalination is now successfully practiced in many countries as drinking water supply has become a growing problem in most parts of the world. Algeria, like the Maghreb countries, has generally adopted two desalination processes (membrane processes and distillation processes which require a phase change, evaporation/condensation), the latter method...
In this paper, the thermal, hydraulic, and thermodynamic performances in a shell and tube heat exchanger fitted with wired-nails circular–cut rod inserts on tube side are investigated experimentally. Thermal performance is expressed in terms of overall heat transfer coefficient (U), effectiveness (ε), and number of transfer unit (NTU), while hydrau...
In this paper, an experimental study is performed to investigate the influence of utilizing high frequency ultrasound atomizer (HFU) on augmenting the performance of a solar still (SS). Atomized saline water has been utilized as a motivator to enhance the humidification process inside the SS cavity. Due to the negative influence of fogging on heat...
In this study, a porous packed media is formed from steel wire mesh screen is utilized to augment the performance of absorbing, transferring and storing the heat in tubular solar still. Also, a vibrator is attached to the wire mesh screen to generate forced vibration that is a transverse harmonic movement. This vibrator is utilized to destroy the s...
This work presents the experimental investigation on the effect of flow rate, energy
storage and cover cooling of inclined PV panel basin type solar still. Experimental
results revealed that the effect of cooling the entire surface of glass cover of solar still
increased the rate of distillate produced with intermittent and without cover cooling. O...
In the present study, a thermo-economic investigation was implemented to assess the enhancement of a solar distillation system (solar still) performance and productivity by inclusion a natural fine stone (black basalt) as a porous sensible absorber. The effect of stone size (1 cm, 1.5 cm and 2 cm) and porosity of the porous absorber on system perfo...
Abstract
In the present paper, comparative study of solar still with internal reflector and composite black gravel-phase change material for thermal heat storage (THS) was presented experimentally. Two operating modes were prepared with different THS; composite material (SS-CM) and PCM (SS-PCM). The experimental model was tested in the climatic co...
In the present paper, comparative study of solar still with internal reflector and composite black gravel-phase change material for thermal heat storage (THS) was presented experimentally. Two operating modes were prepared with different THS; composite material (SS-CM) and PCM (SS-PCM). The experimental model was tested in the climatic conditions o...
Computational fluid dynamic (CFD) is a simulation tool which utilizes the applied and computational mathematics for fluid flow regimes modeling to predict the heat, mass and momentum transfer behavior. In recent years, the solution's accuracy of the CFD simulations became within the acceptable range demonstrating that CFD is a valid tool for perfor...
The most critical aspects of any desalination plant are maintenance and operation costs. For solar water desalination, cost reduction and production of superior water quality are still crucial factors that attract researchers. Faults in the design of desalination systems can lead to many maintenance and operational problems in these systems and may...
This paper presents a comparative experimental study on shell and tube heat exchanger with four different segmental baffle configurations (BC) looking for enhancing the thermal, hydraulic and thermodynamic performances. The baffle configurations are: conventional single segmental baffle (CSSB), staggered single segmental baffle (SSSB), Flower segme...
In this paper, an experimental study is performed to investigate the influence of heat and mass transfer enhancement on the solar still thermodynamic performance by using porous absorber. This study used two identical solar stills with the basin area of 1 m²: one is conventional and the other has a layer of fine basalt stones in the base of the sti...
This paper offers a study on a modified solar power driven hybrid desalination system (SS-HDH). SS-HDH system consisting of a solar still (SS) and air humidification dehumidification (HDH) unit integrated with solar air-water heater. This study is implemented experimentally under the real daytime starting at 8:00 AM until 6:00 PM. The variations on...
The solar still is one of the best choices for obtaining fresh water, in small scale demands which covering
the demand for remote arid regions which do not have enough power source to distill water or infrastructure to deliver fresh water. In this study, experimental investigation of tubular solar still (TSS) is
presented. Two different models were...
Second-law analysis has affected the design methodology of different heat and mass transfer systems to minimize the entropy generation rate, and so to maximize system available work. In this paper, thermodynamic performance evaluation for helical plate heat exchanger (HPHE) based on second law analysis is studied. The entropy generated
per unit amo...
This paper presents a laboratory experiments for investigation of air injection into the shell side of shell-and-multi-tube heat exchanger aims to augment the thermal performance. The air has been injected inside the heat exchanger shell with two methods (cross injection from shell wall and parallel injection from the shell front side) and differen...
In this paper, a numerical investigation on heat transfer enhancement and flow characteristics in a new type plate heat exchanger using helical flow duct in a series arrangement in counter flow of water as the test fluid is presented. Computational fluid dynamics package (ANSYS CFX 16.2) is used. Helical plate with different pitch ratios and differ...
Some serious challenges could be faced during the maintenance processes. One of these challenges is preforming maintenance works in places, to which the humans have difficulties to access. A much known examples are working inside the nuclear reactors and performing works in the offshore wind turbines. As an alternative solution, unmanned vehicles a...
In the last few years, the impact of the industrial activities on the environment becomes significant. The research on improvements of the necessary industrial activities and decreasing of the mentioned impacts therefore is a challenging topic. The harvest of drinking water from the several resources is often in focus of most of research topics rel...
This paper presents an experimental investigation of a solar thermal driven membrane distillation-based
desalination system (SDMD). The system consists of direct contact membrane unit and evacuated tube
solar water heater assisted by evaporative water cooler. This study was carried out on a pilot system
installed at the University of Tanta, Tanta,...
The present study is presented an approach attempting for enhancement of heat and mass transfer between a continuous gas phase and liquid phase in a non-packed humidification towers by injection of different carrier gases such as air, carbon dioxide and helium through water bed. The computational technique utilized was a three-dimensional Navier-St...
This paper introduces a hybrid desalination system coupled with nano-fluid solar heater for small scale needs. The hybrid desalination system consisting of a two stagehumidification–dehumidification unit and single stage flashing evaporation unit (MSH–SSF) configured by a (Al2O3/H2O) nano-fluid solar water heater is tested under the climatological...
This paper introduces a hybrid desalination system coupled with nano-fluid solar heater for small scale needs. The hybrid desalination system consisting of a two stagehumidification–dehumidification unit and single stage flashing evaporation unit (MSH–SSF) configured by a (Al2O3/H2O) nano-fluid solar water heater is tested under the climatological...
Major desalination processes consume a large amount of energy derived from oil and natural gas as heat and electricity, while emitting harmful CO2. Solar desalination has emerged as a promising solar energy-powered technology for producing fresh water. This paper will provide an overview of the economics of solar desalination with an emphasis on th...
In the present work, an attempt has been made to enhance the heat transfer in a solar water heater by using Cu nano-particles dispersed in water for various concentrations ranging from 0% to 5%. Considerable improvement in the solar collector efficiency is obtained by increasing the nano-particle concentration up to 17.5 for a concentration of 5% a...