Hokkaido University · Engineering
Professor Ahmed A. Serageldin's research lab specializes in sustainable energy systems, with a strong focus on enhancing the efficiency and performance of ground source heat pump systems, advanced heat exchanger designs, and innovative thermal comfort solutions. The lab conducts cutting-edge research in computational fluid dynamics (CFD) simulations, experimental validation of geothermal heat exchangers, and integrated building energy systems for zero-energy buildings. Key research directions include optimizing borehole heat exchangers with novel geometries (e.g., oval U-tubes), developing automatic fouling cleaning systems for heat pumps, and advancing radiant cooling and ventilation systems for improved indoor environmental quality. The lab also emphasizes the integration of renewable energy sources and thermal energy storage in large-scale building applications.
Figures are computed from collected data and may differ slightly.
In this paper, a novel U-tube Borehole Heat Exchanger (BHX) with an oval cross-section is proposed for improving the performance of Ground Source Heat Pump systems (GSHP). To study the thermo-hydraulic performance of Borehole Heat Exchanger (BHX) with an oval U-tube: A three-dimensional, symmetric and unsteady state multi-physics Computational Fluid Dynamic (CFD) simulations are carried out by ANSYS FLUENT environment. The conjugate heat transfer and fluid flow are simulated. Borehole thermal re
New small-scale experiments are carried out to study the effect of groundwater flow on the thermal performance of water ground heat exchangers for ground source heat pump systems. Four heat exchanger configurations are investigated; single U-tube with circular cross-section (SUC), single U-tube with an oval cross-section (SUO), single U-tube with circular cross-section and single spacer with circular cross-section (SUC + SSC) and single U-tube with an oval cross-section and single spacer with ci
The warm draft that floats from the window has an unfavorable influence on the indoor thermal comfort condition, which heated the indoor air temperature. Therefore, an integrated cooling system combined novel free-suspended ceiling radiant cooling panel (CRCP) with a wall Attached Ventilation (WAV) system is proposed and investigated by using a three-dimensional conjugated computational fluid dynamic (CFD). Two different WAV systems (ceiling inlet/ceiling outlet; ceiling inlet/floor outlet) are
In this research, automatic fouling cleaning systems that clean and prevent the deposit of fouling by regularly circulating sponge or ceramic balls are proposed. Characteristics of the finned and twisted inner tubes of the double pipe heat exchanger for the heat pump unit are also compared. Lastly, the 50RT-scale field test of the automatic fouling cleaning system integrated with the heat pump system was conducted by targeting temperature control of fish farms. The finned inner tube types presen
A suspended open-type ceiling radiant cooling panel (CRCP) has been proposed recently. The main challenge is improving its cooling performance to overcome limitations for extensive use. Therefore, this study aims to optimize the design of CRCPs with curved and segmented structure to enhance heat transfer. A three-dimensional CFD model was developed to investigate the cooling capacity and heat transfer coefficient of the CRCPs installed inside a single enclosed room. Panel structure was determine
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