Air to Liquid Heat Transfer Coefficient Experimental Comparation between Silicon Carbide and Glass Shell and Tube Heat Exchangers in a Pilot Plant Scale

Air to Liquid Heat Transfer Coefficient Experimental Comparation between Silicon Carbide and Glass Shell and Tube Heat Exchangers in a Pilot Plant Scale

WoS Article

Instead of the expected 3.8–5.4% increase in the heat transfer coefficient due to the better thermal conductivity of silicon carbide tubes compared to glass tubes, the observed increase was 18–22% for 150–275 kg·h−1 airflow and 6 kg·s−1 propane-1,2-diol coolant in tubes. This additional 15–17% increase is probably due to local flow turbulisation due to the roughness of the sintered carbide of 4–10 µm, which unfortunately also causes a 17–24% higher air pressure drop. The hand calculation model used underestimates the heat transfer coefficient by −2% to 10%, which is better than CHEMCAD 8 modeling results.

Instead of the expected 3.8–5.4% increase in the heat transfer coefficient due to the better thermal conductivity of silicon carbide tubes compared to glass tubes, the observed increase was 18–22% for 150–275 kg·h−1 airflow and 6 kg·s−1 propane-1,2-diol coolant in tubes. This additional 15–17% increase is probably due to local flow turbulisation due to the roughness of the sintered carbide of 4–10 µm, which unfortunately also causes a 17–24% higher air pressure drop. The hand calculation model used underestimates the heat transfer coefficient by −2% to 10%, which is better than CHEMCAD 8 modeling results.

shell and tube heat exchanger, cooling of gases, silicon carbide, CHEMCAD modeling, heat transfer coefficient enhancement

shell and tube heat exchanger, cooling of gases, silicon carbide, CHEMCAD modeling, heat transfer coefficient enhancement

HORVÁT, P.; SVĚRÁK, T.

13.10.2024

Taylor & Francis

Philadelphia

0891-6152

EXPERIMENTAL HEAT TRANSFER

volume 38

issue 6

United States of America

768

781

14

https://www.tandfonline.com/doi/full/10.1080/08916152.2024.2413978