Abdelrahman El-Leathy

Abdelrahman El-Leathy

Helwan University

H-index: 20

Africa-Egypt

About Abdelrahman El-Leathy

Abdelrahman El-Leathy, With an exceptional h-index of 20 and a recent h-index of 17 (since 2020), a distinguished researcher at Helwan University, specializes in the field of Renewable Energy, Thermal Energy Systems, Combustion.

His recent articles reflect a diverse array of research interests and contributions to the field:

Vulnerability of Thermal Energy Storage Lining Material to Erosion Induced by Particulate Flow in Concentrated Solar Power Tower Systems

An experimental investigation of chevron-shaped discrete structure configuration on the particle flow behavior of particle heating receivers

Performance Evaluation and Cycle Time Optimization of Vapor-Compression/Adsorption Cascade Refrigeration Systems

Integrated CSP-PV hybrid solar power plant for two cities in Saudi Arabia

Performance of a high-temperature particle-based shell-and-tube crossflow heat exchanger suitable for CSP power generation application

Insulation Performance of Building Components and Effect on the Cooling Load of Homes in Saudi Arabia

On-sun experiments on various particulate materials flowing through obstructed particle heating receiver for solar power tower systems

Performance Assessment of an Ice-Production Hybrid Solar CPV/T System Combining Both Adsorption and Vapor-Compression Refrigeration Systems

Abdelrahman El-Leathy Information

University

Helwan University

Position

Professor College of Engineering

Citations(all)

1284

Citations(since 2020)

795

Cited By

692

hIndex(all)

20

hIndex(since 2020)

17

i10Index(all)

31

i10Index(since 2020)

25

Email

University Profile Page

Helwan University

Abdelrahman El-Leathy Skills & Research Interests

Renewable Energy

Thermal Energy Systems

Combustion

Top articles of Abdelrahman El-Leathy

Vulnerability of Thermal Energy Storage Lining Material to Erosion Induced by Particulate Flow in Concentrated Solar Power Tower Systems

Authors

Zeyad Al-Suhaibani,Nader S Saleh,Shaker Alaqel,Rageh Saeed,Eldwin Djajadiwinata,Syed Noman Danish,Hany Al-Ansary,Abdelrahman El-Leathy,Sheldon Jeter

Journal

Materials

Published Date

2024/3/24

Researchers from all around the world have been paying close attention to particle-based power tower technologies. On the King Saud University campus in the Kingdom of Saudi Arabia, the first integrated gas turbine–solar particle heating hybrid system has been realized. In this study, two different types of experiments were carried out to examine how susceptible prospective liner materials for thermal energy storage tanks were to erosion. An accelerated direct-impact test with high particulate temperature was the first experiment. A low-velocity mass-flow test was the second experiment, and it closely mimicked the flow circumstances in a real thermal energy storage tank. The tests were conducted on bare insulating fire bricks (IFBs) and IFBs coated with Tuffcrete 47, Matrigun 25 ACX, and Tuffcrete 60 M. The latter three lining materials were high-temperature-resilient materials made by Allied Mineral Products Inc. (AMP) (Columbus, OH, USA). The results showed that although IFBs coated with AMP materials worked well in this test, the accelerated direct-impact test significantly reduced the bulk of the bare IFB. As a result, lining substances must be added to the surface of IFBs to increase their strength and protection because they cannot be used in situations where particles directly impact their surface. On the other hand, the findings of the 60 h cold-particle mass-flow test revealed that the IFBs were not significantly eroded. Additionally, it was discovered that the degree of erosion on the samples of bare IFB was unaffected by the height of the particle bed.

An experimental investigation of chevron-shaped discrete structure configuration on the particle flow behavior of particle heating receivers

Authors

Rageh Saeed,Abdulelah Alswaiyd,Nader S Saleh,Shaker Alaqel,Eldwin Djajadiwinata,Hany Al-Ansary,Syed Noman Danish,Abdelrahman El-Leathy,Zeyad Al-Suhaibani,Zeyad Almutairi,Sheldon Jeter

Journal

Results in Engineering

Published Date

2024/3/1

One of the main components of particle-based power tower (PBPT) systems is the particle heating receiver (PHR), through which solid particles are heated by concentrated sunlight. An obstructed-flow PHR (OF-PHR) developed by King Saud University is a type of PHR that has inverted V-shaped obstructions made of Inconel meshes, called chevrons, allowing for a longer time of sunlight exposure on the particles; hence, overcoming one of the limitations of free-fall PHRs. Two problems have been observed with this OF-PHR: (1) a considerable amount of the falling particles bounces forward and leaves the chevrons region; (2) it has a high packing density of chevrons that results in a very low falling particle velocity, which can lead to chevrons overheating. The present research attempts to resolve these issues and improve the PHR performance by understanding deeply the falling-particles behavior of OF-PHRs. The …

Performance Evaluation and Cycle Time Optimization of Vapor-Compression/Adsorption Cascade Refrigeration Systems

Authors

Mahmoud Badawy Elsheniti,Hany Al-Ansary,Jamel Orfi,Abdelrahman El-Leathy

Journal

Sustainability

Published Date

2024/1

The reliance on more sustainable refrigeration systems with less electricity consumption attracts a lot of attention as the demand for refrigeration increases due to population growth and global warming threats. This study examines the use of a cascade vapor-compression/adsorption refrigeration system in hot weather, focusing on condensing temperatures of 50, 55, and 60 C, whereas an air-cooled condenser is in use due to practical considerations. A fully coupled transient model is developed using COMSOL Multiphysics to simulate the integrated system, considering the practical limitations of the vapor compression system (VCS) and the dynamic nature of the adsorption system (ADS). The model combines a lumped model for the ADS with the manufacturer’s data for a VCS compressor at different condensing and evaporating temperatures. It was found that the VCS is more sensitive to the change in the ADS’s condensing temperature, since when the temperature is raised from 50 C to 60 C, the VCS’s COP decreases by 29.5%, while the ADS’s COP decreases by 7.55%. Furthermore, the cycle time of ADS plays an important role in providing the cooling requirements for the bottoming cycle (VCS), and it can be optimized to maximize the energy conversion efficiency of the VCS. At optimum cycle time and compared to the conventional VCS, the cascade system can boost the cooling capacity of the VCS by 18.2%, lower the compressor power by 63.2%, and greatly enhance the COP by 221%. These results indicate that the application of the cascade VCS/ADS in such severe conditions is a more sustainable and energyefficient solution to meet the …

Integrated CSP-PV hybrid solar power plant for two cities in Saudi Arabia

Authors

Hisham Sumayli,Abdelrahman El-Leathy,Syed Noman Danish,Hany Al-Ansary,Zeyad Almutairi,Zeyad Al-Suhaibani,Nader S Saleh,Rageh S Saeed,Abdulelah Alswaiyd,Eldwin Djajadiwinata,Shaker Alaqel

Journal

Case Studies in Thermal Engineering

Published Date

2023/4/1

Solar energy has the potential to provide most of the electricity needed by mankind sustainably into the indefinite future. Concentrated Solar Power (CSP) has conventionally been considered more applicable than photovoltaic (PV) for baseload power since thermal storage is far cheaper than battery storage. However, the solar fields for CSP are relatively expensive. On the other hand, PV plants without storage deliver electric power at a much lower cost than CSP plants of comparable capacity without storage. Integrating both technologies is an attractive approach towards solar baseload power with affordable levelized cost of energy (LCOE). This study, which investigates the two cities of Saudi Arabia, consists of simulation and optimization in three main parts: The first part is a simulation of the CSP parabolic trough (CSP-PT) standalone plant and integrating the output parameters with an economic model to …

Performance of a high-temperature particle-based shell-and-tube crossflow heat exchanger suitable for CSP power generation application

Authors

Nader S Saleh,Shaker Alaqel,Rageh S Saeed,Eldwin Djajadiwinata,Zeyad Al-Suhaibani,Obida Zeitoun,Abdulelah Alswaiyd,Hany Al-Ansary,Abdelrahman El-Leathy,Syed Danish,Muhammad Sarfraz,Sheldon Jeter

Journal

AIP Conference Proceedings

Published Date

2023/10/6

This paper presents a thermal performance evaluation of a pilot 50 kWth moving packed-bed particle-to-air heat exchanger. The exchanger has been integrated into the particle-based concentrating solar power (CSP) test facility located at the campus of King Saud University (KSU) in Riyadh, Saudi Arabia. The configuration is a shell-and-tube design in which solid particles move downward by gravity as a dense packed-bed inside the vertical tubes whereas air flows on the shell-side. The detailed description of the heat exchanger and integration process is presented. Tests were conducted to investigate the effect of particle flow rate on the heat exchanger performance. Although the heat exchanger was tested at off-design conditions using a recuperated air of a gas turbine as a heat source, the results show high values of the overall heat transfer coefficient (up to~ 120 W/m2-C) in accordance with shell-and-tube …

Insulation Performance of Building Components and Effect on the Cooling Load of Homes in Saudi Arabia

Authors

Abdulhamid Al-Abduljabbar,Majid Al-Mogbel,Syed Noman Danish,Abdelrahman El-Leathy

Journal

Sustainability

Published Date

2023/3/24

A common practice in the construction of residential and commercial buildings in Saudi Arabia is to insulate the outer walls and windows only. Other building components such as the roof, columns and slabs, and doors are usually neglected. Moreover, vital components such as the roof and windows are especially neglected in commercially built residential and commercial buildings. The aim of this study is to put this common impression and practice to the test by quantifying the contribution of every building component to the overall air-conditioning load of the building. The hypothesis evaluated in this paper is that despite the common practices, there could be an optimum selection of insulators for the building components that yields the lowest energy consumption and maximum savings not only in energy costs but also installation costs. The required air-conditioning load is determined using manual calculations and the HAP software package for 1022 possible configurations. The findings of the analysis point to the importance of the roof, as it is the major contributor to the thermal load, followed closely by columns and slabs, with 44.2% of the overall cooling load. It is found that a single wall consisting of 2 cm of cement plaster, 20 cm of cement–polyurethane brick, and 2 cm of cement plaster is less expensive and has higher thermal resistance than any of the more expensive double walls. The study found one scenario of possible configurations with the optimized selection of building materials and their insulation materials that provides the most effective insulation at the lowest cost.

On-sun experiments on various particulate materials flowing through obstructed particle heating receiver for solar power tower systems

Authors

Eldwin Djajadiwinata,Rageh S Saeed,Shaker Alaqel,Nader S Saleh,Abdulelah Alswaiyd,Hany Al-Ansary,Abdelrahman El-Leathy,Zeyad Al-Suhaibani,Syed Danish,Muhammad Sarfraz,Sheldon Jeter

Journal

AIP Conference Proceedings

Published Date

2023/10/6

The usage of solid particles as solar thermal energy absorption/storage medium requires particle heating receiver to be developed. King Saud University and Georgia Institute of Technology have been collaborating in designing and testing obstructed particle heating receiver. Size of the receiver is 1.2 mx 1.2 m; the base of it is made of duraboard on which chevron-shaped meshes, made of Inconel 601, are installed as the obstructions in a staggered arrangement. The receiver is employed in the particle-based solar power tower experimental facility at King Saud University. To evaluate performance of the receiver, on-sun tests were conducted on two types of particle material, ie, red sand and CARBOBEAD. Results show that CARBOBEAD absorbed more solar thermal energy and achieved higher temperature rise across the receiver compared to red sand, which is, most likely, due to a higher radiation absorptivity. It …

Performance Assessment of an Ice-Production Hybrid Solar CPV/T System Combining Both Adsorption and Vapor-Compression Refrigeration Systems

Authors

Mahmoud Badawy Elsheniti,Abdulrahman AlRabiah,Hany Al-Ansary,Zeyad Almutairi,Jamel Orfi,Abdelrahman El-Leathy

Journal

Sustainability

Published Date

2023/2/17

The technology of a hybrid solar concentration photovoltaic/thermal (CPV/T) system is an efficient way of converting solar energy to heat and electrical power, in which overall energy-extraction efficiency is at its highest. In this study, numerical dynamic simulation models were developed for a hybrid solar CPV/T system and an adsorption refrigeration system (ARS). Under the climatic conditions of Riyadh all year round, the electrical and thermal powers generated by the CPV/T system were used to estimate the ice production of both the vapor compression refrigeration system (VCS) and the ARS. The CPV/T system can provide a thermal energy of 37.6 kWh and electrical energy of 24.7 kWh a day on average over the year using a 12.5 m2 facing area of Fresnel lenses. The ARS employed an advanced approach which used Maxsorb III adsorbent packed in two aluminum foam beds. An optimum cycle time of the ARS was adapted for each month to match the variation in the thermal energy, while a variable-speed compressor was chosen for the VCS. Due to its higher coefficient of performance (COP), the proposed solar hybrid system can produce 494.4 kg of ice per day while sharing 84.5% of the VCS. The average solar COP over the year of the hybrid system can attain 0.875, which represents a promising value for a solar ice-production system.

Frictional characterization of different particulate materials to be used in concentrated solar power system

Authors

Rageh S Saeed,Nader S Saleh,Shaker Alaqel,Eldwin Djajadiwinata,Abdulelah Alswaiyd,Abdelrahman El-Leathy,Syed Noman Danish,Hany Al-Ansary,Zeyad Almutairi,Zeyad Al-Suhaibani,Muhammad Sarfraz,Sheldon Jeter

Journal

AIP Conference Proceedings

Published Date

2023/10/6

Utilizing the solid particles as a heat transfer media in concentrated solar power systems offers many advantages over other current commercial heat transfer media like steam, oil, air, and molten salt. These advantages are: high operating temperature (> 1000℃), abundance, low cost, high thermal energy storage capacity, no freezing limit, and its ability to be irradiated directly. The solid particles do not need to be pumped to the system facilities. Friction properties play the main role in the transfer of particles from one place to another. However, it is important to study the flow kinematics in which the particle flow behavior is affected by friction or interparticle properties such as the angle of rest and the internal angle of friction. Knowing such angles is important to design components like chutes, hoppers, particle-to-fluid heat exchanger, etc., and understanding the characteristics of particle flow. In this study, the …

Optimization of Thermal Energy Storage System for a 1.3 MWe Particle-Based Concentrated Solar Power Facility

Authors

Abdelrahman El-Leathy,Syed Noman Danish,Hany Al-Ansary,Zeyad Al-Suhaibani,Saud Al-Tamimi,Ans Al-Turki,Rageh S Saeed,Nader S Saleh,Eldwin Djajadiwinata,Shaker Alaqel

Published Date

2023/12/19

In this research, the main objective was to develop, design, and construct an economical Thermal Energy Storage (TES) system for storing heated solid particles used as a heat transfer medium in Concentrating Solar Power (CSP) with a total cost not exceeding ${\$}$5/kWh and 1% maximum heat loss of the overall system energy per day as per sunshot initiative of US department of energy. The TES is to be used for storing heated solid particles in a 1.3MWe CSP system designed for construction at Waad Al-Shamal, Saudi Arabia. Initially, the TES was made by high-density fire brick (HFB), insulation fire brick (IFB), perlite concrete (PC), expansion joint (EJ), and reinforced concrete (RC). It was discovered that (PC) has to be mixed with refractory cement. This mixture increased the PC’s layer cost, so the design changed by eliminating the (PC) layer and only using IFB in terms of insulation. The theoretical results of …

An experimental observations of an air-tight thermal storage tank in particle-based concentrated solar power systems

Authors

Shaker Alaqel,Nader S Saleh,Rageh S Saeed,Eldwin Djajadiwinata,Abdulelah Alswaiyd,Hany Al-Ansary,Abdelrahman El-Leathy,Zeyad Al-Suhaibani,Syed Noman Danish,Muhammad Sarfraz,Sheldon Jeter

Journal

AIP Conference Proceedings

Published Date

2023/10/6

During commissioning of the CSP test facility at King Saud University, a large temperature drop was noted when charging the thermal energy storage (TES) bin. Heat loss can be mitigated by using an airtight TES bin. In this paper, we present a small-scale TES bin, which can be isolated and sealed from its surroundings, ie, the TES bin can be confined, isolated and sealed from its environment. There were two operational scenarios simulated, namely the start-up and steadystate scenarios. In the start-up scenario, the bin's centerline temperature was almost the same as the particle inlet temperature. Thus, the bin's wall was the sole cause of heat loss. Entrained air did not contribute to heat loss. Based on the results of the steady-state scenario, an air-tight bin can reduce the charging/discharging loss sufficiently. Additionally, no" significant" build-up of pressure was detected during bin charging.

Material compatibility between discrete structures and candidate particulates in a particle heating receiver of a concentrated solar power system

Authors

Rageh S Saeed,Eldwin Djajadiwinata,Abdulelah Alswaiyd,Shaker Alaqel,Nader S Saleh,Hany Al-Ansary,Abdelrahman El-Leathy,Sheldon Jeter,Syed Noman Danish,Zeyad Al-Suhaibani,Muhammad Sarfraz,Zeyad Almutairi

Journal

AIP Conference Proceedings

Published Date

2023/10/6

Direct particulate heating receivers (DPHR) are the most important part of the particle-based concentering solar power (PBCSP) systems in which the particles are exposed to direct high-concentrated sunlight. One variation of DPHRs is the obstructed flow receiver, which King Saud University (KSU) and the Georgia Institute of Technology have been developing for years. In this type of PHR, the particles fall freely in the form of a curtain through some obstruction to decelerate flow and allow the falling particles to absorb a considerable amount of thermal energy. The discrete structure presented in this design uses chevron-shaped mesh made of metallic alloy (Inconel 601) that was fixed on a Duraboard HD (an alumina-silica ceramic fiberboard). The design has been successfully tested using red sand and CARBOBEAD as heat transfer media. However, the interaction between the particulate and chevron mesh …

First deployed gas-turbine integrated particle-based power tower facility at King Saud University: Proof of solar contribution

Authors

Eldwin Djajadiwinata,Shaker Alaqel,Nader S Saleh,Rageh S Saeed,Abdulelah Alswaiyd,Hany Al-Ansary,Abdelrahman El-Leathy,Zeyad Al-Suhaibani,Syed Danish,Muhammad Sarfraz,Sheldon Jeter

Journal

AIP Conference Proceedings

Published Date

2023/10/6

Particle-based solar power tower is a promising technology that can surpass the temperature limit of today’s commercial molten salt systems, which will improve the system’s efficiency. King Saud University (KSU) in collaboration with Saudi Electricity Company (SEC) have built an experimental particle-based power tower system integrated with gasmicroturbine at King Saud University. This test facility is, mainly, aimed to:(1) prove the concept of using solid particles as a solar thermal energy storage medium from which the gas-turbine receives its heat source; therefore, fossil fuel consumption decreases, and (2) prove the system’s ability to raise the temperature of the solar-heated particles above 600 C, surpassing the temperature limit of molten salt power tower systems, ie, typically limited to around 600 C. Previous on-sun tests using red sand have shown the system’s ability to achieve both goals independently, in …

Heat loss quantification in the first integrated gas-turbine particle-based power tower facility at King Saud University

Authors

Nader S Saleh,Shaker Alaqel,Eldwin Djajadiwinata,Rageh S Saeed,Abdulelah Alswaiyd,Hany Al-Ansary,Abdelrahman El-Leathy,Zeyad Al Suhaibani,Syed Danish,Muhammad Sarfraz,Sheldon Jeter

Journal

AIP Conference Proceedings

Published Date

2023/10/6

This paper explores one important issue related to the operation of particle-based concentrating solar power (PBCSP) systems which is the heat that might be lost through the main components comprising such systems. Tests conducted at the PBCSP test facility at King Saud University (KSU) in Riyadh, Saudi Arabia reveal significant heat loss in several components, including the thermal energy storage (TES) bin, the particle-to-working-fluid heat exchanger (PWFHX), the particle lift system, and the air piping. On-sun tests results show that only a small portion (16%) of the net thermal energy captured in the particle heating receiver (PHR) was transferred to the turbine’s air, which was then converted into electrical power. The remaining amount of energy was either leaked or consumed to heat up the thermal mass of facility’s components. The air entrained with particles flowing to the TES bin resulted in a heat loss …

Experimental Investigation of a Moving Packed-Bed Heat Exchanger Suitable for Concentrating Solar Power Applications

Authors

Nader S Saleh,Shaker Alaqel,Eldwin Djajadiwinata,Rageh S Saeed,Zeyad Al-Suhaibani,Obida Zeitoun,Hany Al-Ansary,Abdulelah Alswaiyd,Abdelrahman El-Leathy,Syed Danish,Sheldon Jeter,Ashley Byman,Neville Jordison,David Moon

Journal

Applied Sciences

Published Date

2022/4/17

This paper presents a thermal performance evaluation of a novel particle-to-air heat exchanger. The heat exchanger has a patented design with a shell-and-tube configuration. Solid particles move as a dense packed-bed inside the vertical tubes of the heat exchanger whereas air flows on the shell-side. This design avoids a number of limitations associated with the state-of-the-art heat exchangers in the same category, such as the stagnant/void zones and the prolonged residence time. The heat exchanger has a 50-kW thermal duty; it has been integrated into the particle-based concentrating solar power facility located at the campus of King Saud University in Riyadh, Saudi Arabia. The detailed description of the heat exchanger and the integration process is introduced. The recuperated air of the facility’s power cycle is used to heat the solid particles being circulated inside the facility. The solid particles used in this study are engineered particles called Carbobead CP with 0.3 mm mean diameter. The effect of particle flow rate on the thermal performance of the heat exchanger is investigated. The results show that as the particle flow rate increases, the overall heat transfer coefficient (U) increases; a maximum value was measured to be 150 W/m2-°C based on LMTD calculations. The measurement accuracy was verified by repeating several tests; a slight variation was observed in the measured U. The results also show that only a small air pressure drop (~5 kPa) was measured across the heat exchanger. Furthermore, it was found that a significant part of the heat exchange occurred at the bottom section of the heat exchanger.

An experimental investigation of heat losses during charging the thermal storage tank in a particle-based CSP system

Authors

Nader S Saleh,Shaker Alaqel,Eldwin Djajadiwinata,Rageh S Saeed,Abdulelah Alswaiyd,Hany Al-Ansary,Abdelrahman El-Leathy,Sheldon Jeter,Syed Danish,Zeyad Al-Suhaibani,Said Abdel-Khalik,Muhammad Sarfraz

Journal

AIP Conference Proceedings

Published Date

2022/5/12

This paper presents results of an exploratory study aimed to investigate heat loss during charging the thermal energy storage (TES) bin with hot solid particles. Tests were performed at the pilot particle-based power tower plant in King Saud University in Riyadh, Saudi Arabia. In this plant, a small TES bin is installed between the particle heating receiver and the particle-to-working-fluid heat exchanger. Two types of experiments, the on-sun test and the steady-state test, were conducted; in each experiment, two cases were considered, namely the empty bin and full bin. Results show that in the case of empty TES bin, the air, entrained as a result of particles falling, can cause a significant temperature drop in the particle side. Moreover, the use of several particle-feeding lines can promote the so-called chimney effect. In the case of full bin, the amount of entrained air was reduced significantly, thus the temperature drop in …

Using a Combination of Activated Carbon and Graphene Nanoparticles in a Consolidated Form for Adsorption Ice Maker: A System-Level Modeling

Authors

Mahmoud Badawy Elsheniti,Mohamed Shaaban Eissa,Hany Al-Ansary,Jamel Orfi,Abdelrahman El-Leathy,Osama Elsamni

Journal

Applied Sciences

Published Date

2022/7/28

Adsorption refrigeration systems are one of the emerging decarbonization technologies that can use eco-friendly heating sources and working fluids. However, the highly porous adsorbent materials used in these systems have a low thermal conductivity that hinders their system performance enhancement. Graphene nanoplatelets are proposed in the literature to improve the conductive heat transfer through the adsorbent field and the resulting composite adsorbents were favorably testified at the material level. In this study, the impact of employing a composite adsorbent that comprises of 50% activated carbon type Maxsorb III, 40% graphene nanoplatelets, and 10% binder was numerically investigated at a system level. The contradictory effects of heat and mass transfer mechanisms within the composite adsorbent on the performance of an adsorption ice production system were explored for three cases of composite layer thicknesses at different cycle times. The results showed that the maximum specific daily ice production and coefficient of performance of 33.27 kgice·kgads−1·day−1 and 0.3046 were attained at composite thicknesses of 2 and 5 mm and cycle times of 430 and 1230 s, respectively. The higher composite thickness of 10 mm increased the mass transfer resistances, which overlooked the enhancement in the heat transfer and reduced the overall performance.

Examination of Using Aluminum-Foam/Finned-Tube Beds Packed with Maxsorb III for Adsorption Ice Production System

Authors

Mahmoud Badawy Elsheniti,Mohamed Shaaban Eissa,Hany Al-Ansary,Jamel Orfi,Osama Elsamni,Abdelrahman El-Leathy

Journal

Energies

Published Date

2022/4/8

Producing ice using adsorption systems can represent a sustainable solution and meet the recent global environmental regulations as they use natural refrigerants and can be driven by solar energy. However, the beds used in these systems still have low thermal and adsorption characteristics. This study investigates numerically the use of an emerging aluminum foamed bed packed with advanced Maxsorb adsorbent in a two-bed adsorption system and reports cases of performance improvements compared to the classical finned-tube based system used to produce ice. A comprehensive 2-D transient pressure distribution model for the two beds was developed and validated. The model considers the temporal and spatial variations of the two beds’ parameters, while the effect of the thermal mass and heat transfer effectiveness of the condenser and evaporator components are imitated at the boundary conditions for bed openings using two zero-dimensional models. The results show the interrelated effects of varying the cycle times from 400 s to 1200 s with 2, 5, and 10 mm foam thicknesses/fin heights on the overall performance of both systems. The Al-foam based system demonstrated the performance superiority at a 2 mm foam thickness with maximum ice production of 49 kgice/kgads in 8 h, an increase of 26.6% over the counterpart finned-tube based system at a 400 s cycle time. The best COP of 0.366 was attained at a 5 mm foam thickness and 1200 s with an increase of 26.7%. The effective uptake of the Al-foam based system was reduced dramatically at a 10 mm foam thickness, which deteriorated the system performance.

Enhancing Adsorption Ice Maker Productivity using Beds of Aluminium Foam Packed with Activated Carbon

Authors

MB Elsheniti,H Al-Ansary,J Orfi,A El-Leathy,MS Eissa,O Elsamni

Journal

IOP Conference Series: Earth and Environmental Science

Published Date

2022/5/1

The adsorption refrigeration system driven by solar energy is a promising sustainable solution to tackle the growing demand for cooling and meet environmental regulations as well. In addition, the increase in refrigeration needs is in phase with the increase in the abundant solar energy in the Middle East. This study aims at numerically investigating the utilize of a high adsorption performance material namely Maxsorb III, a type of activated carbon, packed in an advanced aluminium foam bed to produce ice from two-bed adsorption system. A detailed 2-D axisymmetric transient model considering mass, momentum, and energy balance equations coupled with isotherms and kinetic models in the adsorbent domain to describe the adsorption phenomena was developed and used for the simulations. Results of a typical packed bed using finned tube configuration were used as a base model to compare the performance …

Preliminary Thermal and Structural Analysis of High Temperature Multilayered Thermal Energy Storage Bin in a Particle Heating Receiver Based Thermal Power Plants

Authors

Muhammad Sarfraz,Shaker Alaqel,Nader S Saleh,Rageh Saeed,Eldwin Djajadiwinata,Abdulelah Alswaiyd,Kenzo Repole,Ryan Yeung,Syed Danish,Abdelrahman El-Leathy,Zeyad Al-Suhaibani,Zeyad Almuthairi,Sheldon Jeter,Hany Al-Ansary

Published Date

2022/7/11

Thermal Energy Storage (TES) bins are considered critical components in particle heating receiver-based concentrated solar thermal power (PHR-CSP) plants. Their reliability and efficiency play an integral part in ensuring the commercialization of particle-based CSP technology. Heat loss/leakage from TES walls, particle erosion, thermal and structural stresses during charging/discharging, and hot/cold startup are some of the roadblocks that need to be addressed adequately before commercializing the PHR-CSP technology. To achieve this target, our teams at King Saud University (KSU) and Georgia Institute of Technology (GIT) have successfully demonstrated the multilayered TES bin in the past to store solid particles at a temperature of 700°C. To achieve a higher thermal efficiency of the plant, the particles are required to be heated at temperatures above 1000°C. This causes high thermal and structural …

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Abdelrahman El-Leathy FAQs

What is Abdelrahman El-Leathy's h-index at Helwan University?

The h-index of Abdelrahman El-Leathy has been 17 since 2020 and 20 in total.

What are Abdelrahman El-Leathy's top articles?

The articles with the titles of

Vulnerability of Thermal Energy Storage Lining Material to Erosion Induced by Particulate Flow in Concentrated Solar Power Tower Systems

An experimental investigation of chevron-shaped discrete structure configuration on the particle flow behavior of particle heating receivers

Performance Evaluation and Cycle Time Optimization of Vapor-Compression/Adsorption Cascade Refrigeration Systems

Integrated CSP-PV hybrid solar power plant for two cities in Saudi Arabia

Performance of a high-temperature particle-based shell-and-tube crossflow heat exchanger suitable for CSP power generation application

Insulation Performance of Building Components and Effect on the Cooling Load of Homes in Saudi Arabia

On-sun experiments on various particulate materials flowing through obstructed particle heating receiver for solar power tower systems

Performance Assessment of an Ice-Production Hybrid Solar CPV/T System Combining Both Adsorption and Vapor-Compression Refrigeration Systems

...

are the top articles of Abdelrahman El-Leathy at Helwan University.

What are Abdelrahman El-Leathy's research interests?

The research interests of Abdelrahman El-Leathy are: Renewable Energy, Thermal Energy Systems, Combustion

What is Abdelrahman El-Leathy's total number of citations?

Abdelrahman El-Leathy has 1,284 citations in total.

What are the co-authors of Abdelrahman El-Leathy?

The co-authors of Abdelrahman El-Leathy are Arif Hepbasli, Ph. D., Certified Energy Manager/(Non Certified) Exergy Manager, Prof. Mohamed Ali, Khaled Addoweesh, Hosny Abou-Ziyan, Professor of Mechanical Engineering, M.N. Metwally.

    Co-Authors

    H-index: 89
    Arif Hepbasli, Ph. D., Certified Energy Manager/(Non Certified) Exergy Manager

    Arif Hepbasli, Ph. D., Certified Energy Manager/(Non Certified) Exergy Manager

    Yasar Üniversitesi

    H-index: 41
    Prof. Mohamed Ali

    Prof. Mohamed Ali

    King Saud University

    H-index: 23
    Khaled Addoweesh

    Khaled Addoweesh

    King Saud University

    H-index: 16
    Hosny Abou-Ziyan, Professor of Mechanical Engineering

    Hosny Abou-Ziyan, Professor of Mechanical Engineering

    Helwan University

    H-index: 5
    M.N. Metwally

    M.N. Metwally

    Umm Al-Qura University

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