Sameh Tawfik

@aast.edu

Deparment of Marine Engineering Technology - College of Maritime Transport & Tecnology
Arab Acdemy For Scince,Technology & Maritime Transport

Sameh Tawfik


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https://researchid.co/samehtawfik
Dr. Sameh Tawfik is an Assistant Professor of Mechanical Engineering at the Arab Academy for Science, Technology & Maritime Transport (AASTMT) in Alexandria, Egypt. He received his PhD in Mechanical Engineering from the University of Alexandria in 2016. His research interests include cryogenic gas processing, HVAC, and thermodynamics.

Dr. Tawfik has published several papers in peer-reviewed journals and conferences. He is also a member of the American Society of Mechanical Engineers (ASME).

In addition to his teaching and research duties, Dr. Tawfik is also a consultant in the field of mechanical engineering. He has worked on a variety of projects, including the design and construction of cryogenic gas processing plants and HVAC systems for commercial and industrial buildings.

Dr. Tawfik is a highly respected member of the AASTMT community. He is known for his dedication to his students and his commitment to excellence in research and teaching.

RESEARCH, TEACHING, or OTHER INTERESTS

Mechanical Engineering, Human Factors and Ergonomics, Energy, Education
5

Scopus Publications

29

Scholar Citations

4

Scholar h-index

Scopus Publications

  • Novel ethylene boil-off re-liquefaction utilizing absorption-ejector cycle: Exergy and economic analysis
    Ahmed T. Abd El-Hamid, Ahmed A. Hanafy, Sameh Tawfik, Wael M. El-Maghlany
    Separation and Purification Technology, 2026
  • Enhancing efficiency and sustainability: a comparative analysis of refrigerants in ethylene BOG re-liquefaction processes
    Ahmed T. Abd El-Hamid, Ahmed A. Hanafy, Sameh Tawfik, Wael M. El-Maghlany
    Journal of Engineering and Applied Science, 2025
    This paper presents a comparative thermodynamic analysis of refrigerants used in ethylene boil-off gas (BOG) re-liquefaction systems within petrochemical plants, aimed at enhancing operational efficiency and environmental sustainability. The study evaluates refrigerants including R-290, R-744, R-125, R-170, and R-1270 alongside cascade refrigeration systems combining R-744 with R-717 and R-290, using Aspen HYSYS simulations to assess performance metrics such as Coefficient of Performance (COP), compressor power consumption, refrigerant mass flow rates, and total pressure ratios under varying operating conditions. Results quantify that R-1270 achieves the lowest power consumption rate of approximately 60.11 kW per unit BOG mass flow, slightly outperforming R-290, while also requiring significantly lower refrigerant mass flow. Conversely, R-125 exhibits the highest energy demand and refrigerant usage. Cascade cycles demonstrate competitive performance with reduced total pressure ratios and power requirements. These findings elucidate the thermodynamic advantages of selecting specific refrigerants for ethylene BOG reliquefaction, highlighting R-1270's potential for reducing energy consumption and environmental impact. The study's insights provide practical guidance for optimizing refrigeration cycle designs in petrochemical applications, supporting improvements in system performance and sustainability.
  • Performance enhancement of marine LNG BOG reliquefaction systems via passive diffuser integration: a thermodynamic and economic assessment
    Hassan A. R. El-Shoubashy, Wageeh. A. El-Askary, Yehia A. Eldrainy, Sameh T. Abdelfattah, Mohamed H. Mohamed
    Journal of Engineering and Applied Science, 2025
    This article presents a novel thermodynamic approach to improve energy efficiency and cost-effectiveness of boil-off gas (BOG) reliquefaction systems on marine carriers. The study investigates the impact of installing six stationary diffusers upstream of each compressor within both the BOG and mixed refrigerant (MR) cycles. Simulation using Aspen HYSYS revealed substantial performance improvements: the coefficient of performance (COP) increased by 16.42% (from 0.14 to 0.163), exergetic efficiency (FOM) improved by 16.07% (from 22.4% to 26%), specific power consumption decreased by 14.12% (from 3638 to 3124 kW/[kg/s]), and specific energy consumption declined by 14.85% (from 1.01 to 0.86 kWh/[kg/s]). Additionally, the total heat rejected to seawater increased by 18.19% (from 191.9 to 226.81 kW), and the energy cost for a 10-day voyage dropped by 14.85% (from $9892 to $8423). These gains were accompanied by a 68.48% rise in total plant irreversibility due to increased compressor discharge temperatures. The results confirm that integrating passive diffusers can significantly enhance the thermodynamic and economic performance of marine LNG reliquefaction systems.
  • Steady state numerical simulation and studying performance of a modified diffusion absorption refrigeration cycle
    Mohamed Elsayed, Abdelhamid Attia, Sameh Tawfeek
    Alexandria Engineering Journal, 2022
  • Upgrade Egyptian biogas to meet the natural gas network quality standard
    Alexandria Engineering Journal, 2016

RECENT SCHOLAR PUBLICATIONS

  • Dr: Sameh Tawfik Professional Profile
    DS Tawfik
    https://doi.org/10.13140/RG.2.2.24873.25447 , 2026
    2026
  • DESIGN AND FABRICATION OF A SEAWATER ICE FLAKE MACHINE FOR SMALL FISHING VESSELS
    DS TawFik
    Arab Academy For Science ,Technology &Maritime Transport , 2026
    2026
  • Performance enhancement of marine LNG BOG reliquefaction systems via passive diffuser integration: a thermodynamic and economic assessment
    HAR El-Shoubashy, W El-Askary, YA Eldrainy, ST Abdelfattah, ...
    Journal of Engineering and Applied Science 72 (1), 214 , 2025
    2025
    Citations: 1
  • Enhancing efficiency and sustainability: a comparative analysis of refrigerants in ethylene BOG re-liquefaction processes
    ATA El-Hamid, AA Hanafy, S Tawfik, WM El-Maghlany
    Journal of Engineering and Applied Science 72 (1), 178 , 2025
    2025
  • Novel ethylene boil-off re-liquefaction utilizing absorption-ejector cycle: Exergy and economic analysis
    AT Abd El-Hamid, AA Hanafy, S Tawfik, WM El-Maghlany
    Separation and Purification Technology, 136270 , 2025
    2025
  • Boil-off Gas Reliquefaction Systems in LNG carriers
    DS Tawfik
    Arab Academy for Science, Technology and Maritime Transport - College of … , 2025
    2025
  • 360 degree Autonomous Fire Fighting Robot with AI Design and Implementation
    DHAREDSTDN Mabrouk
    Research Gate , 2025
    2025
  • مصر الرقمية - حديث المساء - قناة الإسكندرية - الجمعة 20-6-2025 ‎
    د/ سامح توفيق عبد الفتاح محمود ‎
    https://youtu.be/uc1XlGGIvjA , 2025
    2025
  • مهارات التواصل داخل محيط العمل و أسلوب التعامل المهنى ‎
    د/ سامح توفيق عبد الفتاح محمود ‎
    https://youtu.be/S12DuLZXbl0 , 2025
    2025
  • صناع التميز ‎
    د/ سامح توفيق عبد الفتاح محمود ‎
    https://youtu.be/nnGcvpTwPlA?si=NaYsLaOaBVV2lrZf , 2025
    2025
  • Analysis of the Ever Given Incident in the Suez Canal
    DS Tawfik
    https://youtu.be/REYfjoSQs7g , 2025
    2025
  • Applied Mechanics (Lecture-1)
    DS Tawfik
    https://youtu.be/Nr0ATqZPBpQ?si=MMAPhNSfNUmvX3-R , 2025
    2025
  • مهنة المعلم بين الهواية و الموهبة ‎
    د/ سامح توفيق عبد الفتاح محمود ‎
    https://youtu.be/OzbIvXMNBBI?si=Qo2TStg1c_AD2vIY , 2025
    2025
  • Emotional Intelligence for Leaders
    DS Tawfik
    https://youtu.be/g9P_To0msAg , 2025
    2025
  • Surge behavior in Alexandria western harbor and its correlation to dominant meteorological condition
    MMM Heiba, TM El-Geziry, ST Abd El Fattah
    Maritime Research and Technology 4 (1), 1-27 , 2025
    2025
  • Ship Water Tightness
    DS Tawfik
    https://youtu.be/i8FKNkY9zjY , 2024
    2024
  • Air Conditioning Fundamentals
    DS Tawfik
    https://youtu.be/kRMjCBi3Jik , 2024
    2024
  • Refrigeration Cycle Components
    DS Tawfik
    https://youtu.be/PToSIqS_rqk , 2024
    2024
  • Rudders, Propellers, and Thrusters
    DS Tawfik
    Rudders, Propellers, and Thrusters , 2024
    2024
  • Stresses on Ships
    DS Tawfik
    https://youtu.be/bNossJeTkEs , 2024
    2024

MOST CITED SCHOLAR PUBLICATIONS

  • Steady state numerical simulation and studying performance of a modified diffusion absorption refrigeration cycle
    ST Mohamed Elsayed, Abdelhamid Attia
    Alexandria Engineering Journal , 2021
    2021.0
    Citations: 7
  • Upgrade Egyptian biogas to meet the natural gas network quality standard
    ST Abd Elfattah, YA Eldrainy, A Attia
    Alexandria Engineering Journal 55 (3), 2279-2283 , 2016
    2016.0
    Citations: 7
  • Utilization of Aspen HYSYS simulation to determine the optimum absorber working pressure needed to achieve more than 0.99 methane purity from Egyptian biogas
    ST Abd Elfattah, YA Eldrainy, A Attia
    2016.0
    Citations: 6
  • Numerical simulation to optimize Di-Ethanol-Amine (DEA) strength for achieving the highest methane purity from biogas
    ST Abd Elfattah, YA Eldrainy, A Attia
    Citations: 4
  • Optimization of Pressure Swing Absorber (PSA) Geometry to Achieve Highest Methane Purity from the Egyptian Biogas Using Aspen HYSYS Simulation
    S Tawfik
    The International journal of Innovative Research & Development 5 (1), 82-88 , 2016
    2016.0
    Citations: 2
  • Performance enhancement of marine LNG BOG reliquefaction systems via passive diffuser integration: a thermodynamic and economic assessment
    HAR El-Shoubashy, W El-Askary, YA Eldrainy, ST Abdelfattah, ...
    Journal of Engineering and Applied Science 72 (1), 214 , 2025
    2025.0
    Citations: 1
  • Potable Water Generation from Atmospheric Moisture in Coastal Areas Using the Thermoelectric Effect
    STA Mahmoud
    Maritime Research and Technology 1 (2), 36-45 , 2022
    2022.0
    Citations: 1
  • SIMULATION OF MOISTURE CONTENT REMOVAL IN RAW NATURAL GAS
    DHAR El-Shoubashy
    AUI Research Journal 1 (2020) , 2020
    2020.0
    Citations: 1
  • Dr: Sameh Tawfik Professional Profile
    DS Tawfik
    https://doi.org/10.13140/RG.2.2.24873.25447 , 2026
    2026.0
  • DESIGN AND FABRICATION OF A SEAWATER ICE FLAKE MACHINE FOR SMALL FISHING VESSELS
    DS TawFik
    Arab Academy For Science ,Technology &Maritime Transport , 2026
    2026.0
  • Enhancing efficiency and sustainability: a comparative analysis of refrigerants in ethylene BOG re-liquefaction processes
    ATA El-Hamid, AA Hanafy, S Tawfik, WM El-Maghlany
    Journal of Engineering and Applied Science 72 (1), 178 , 2025
    2025.0
  • Novel ethylene boil-off re-liquefaction utilizing absorption-ejector cycle: Exergy and economic analysis
    AT Abd El-Hamid, AA Hanafy, S Tawfik, WM El-Maghlany
    Separation and Purification Technology, 136270 , 2025
    2025.0
  • Boil-off Gas Reliquefaction Systems in LNG carriers
    DS Tawfik
    Arab Academy for Science, Technology and Maritime Transport - College of … , 2025
    2025.0
  • 360 degree Autonomous Fire Fighting Robot with AI Design and Implementation
    DHAREDSTDN Mabrouk
    Research Gate , 2025
    2025.0
  • مصر الرقمية - حديث المساء - قناة الإسكندرية - الجمعة 20-6-2025 ‎
    د/ سامح توفيق عبد الفتاح محمود ‎
    https://youtu.be/uc1XlGGIvjA , 2025
    2025.0
  • مهارات التواصل داخل محيط العمل و أسلوب التعامل المهنى ‎
    د/ سامح توفيق عبد الفتاح محمود ‎
    https://youtu.be/S12DuLZXbl0 , 2025
    2025.0
  • صناع التميز ‎
    د/ سامح توفيق عبد الفتاح محمود ‎
    https://youtu.be/nnGcvpTwPlA?si=NaYsLaOaBVV2lrZf , 2025
    2025.0
  • Analysis of the Ever Given Incident in the Suez Canal
    DS Tawfik
    https://youtu.be/REYfjoSQs7g , 2025
    2025.0
  • Applied Mechanics (Lecture-1)
    DS Tawfik
    https://youtu.be/Nr0ATqZPBpQ?si=MMAPhNSfNUmvX3-R , 2025
    2025.0
  • مهنة المعلم بين الهواية و الموهبة ‎
    د/ سامح توفيق عبد الفتاح محمود ‎
    https://youtu.be/OzbIvXMNBBI?si=Qo2TStg1c_AD2vIY , 2025
    2025.0