- Refrigeration and Air Conditioning Technologies
- Building Energy and Comfort Optimization
- Heat Transfer and Optimization
- Adsorption and Cooling Systems
- Heat Transfer and Boiling Studies
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Advanced Thermodynamic Systems and Engines
- Magnetic and transport properties of perovskites and related materials
- Energy Efficiency and Management
- Solar-Powered Water Purification Methods
- Combustion and Detonation Processes
- Liver Disease and Transplantation
- Solar Thermal and Photovoltaic Systems
- Organ Transplantation Techniques and Outcomes
- Green IT and Sustainability
- Geothermal Energy Systems and Applications
- Smart Grid Energy Management
- Phase Change Materials Research
- Advanced Multi-Objective Optimization Algorithms
- Advanced Battery Technologies Research
- Wind and Air Flow Studies
- Advanced Thermodynamics and Statistical Mechanics
- Phase Equilibria and Thermodynamics
- Noise Effects and Management
- Conservation Techniques and Studies
American University in Cairo
2021-2025
University of Alabama at Birmingham
2025
University of Saskatchewan
2024
Lawrence Berkeley National Laboratory
2024
Oak Ridge National Laboratory
2013-2023
Cairo University
2005-2023
University of Maryland, College Park
2008-2022
National Institute of Standards and Technology
2022
Hudson Institute
2021
John Wiley & Sons (United States)
2021
This paper presents a review of the next generation not-in-kind technologies to replace conventional vapor compression refrigeration technology for household applications. Such are sought provide energy savings or other environmental benefits space conditioning, water heating and domestic use. These alternative include: thermoacoustic refrigeration, thermoelectric thermotunneling, magnetic Stirling cycle pulse tube Malone absorption adsorption compressor driven metal hydride heat pumps....
This paper presents a statistical method for modeling the behavior of household occupants to estimate residential energy consumption. Using data gathered by U.S. Census Bureau in American Time Use Survey (ATUS), actions carried out survey respondents are categorized into ten distinct activities. These activities defined correspond major consuming loads commonly found within sector. Next, time varying minute resolution Markov chain based models different occupant types developed. these...
Worldwide use of high global warming potential (GWP) hydrofluorocarbon (HFC) refrigerants for space conditioning and food storage results in significant equivalent greenhouse gas (GHG) emissions. This is further exacerbated developed countries by the current transition from hydrochlorofluorocarbon (HCFC) to HFC refrigerants. Under Kigali amendment Montreal Protocol, proposed phase-out currently used HCFC has initiated a re-evaluation some pre-existing as well development evaluation new...
Lewy bodies and neurofibrillary tangles, composed of α-synuclein (α-syn) tau, respectively, often are found together in the same brain correlate with worsening cognition. Human postmortem studies show colocalization α-syn tau occurs bodies, but limited effort to quantify colocalization. In this study, middle temporal gyrus tissue from decedents (n = 9) without lobe disease (control) or body (LBD) was immunofluorescently labeled antibodies phosphorylated (p-α-syn), at Ser202/Thr205 (p-tau),...
In this study, the potential implementation of three different low-GWP refrigerants (R32, R452B, and R454B) as replacements for R410A was investigated. The study performed using a simulation tool developed by authors called RACHP-Lab, which is vapor compression system based on physics-based typical mini-split air conditioners. carried out validated experimental performance data 10 conditioning units available in Egyptian market. included fixed-speed or variable-speed compressors operated...