Polymeric hollow fibre heat exchanger for reducing vehicle CO2 pollution

Polymeric hollow fibre heat exchanger for reducing vehicle CO2 pollution

WoS Article

Polymeric hollow fibre heat exchangers have proven to be suitable for use in passenger car cooling systems. Chassis dynamometer tests and on-road pre-tests were successfully conducted on a third-generation Škoda Octavia equipped with a 1.4 TSI gasoline engine, front-wheel drive, and a six-speed manual transmission. Additionally, the polymeric heat exchanger was evaluated in a calorimetric circuit. All tests confirmed that a polymeric hollow fibre heat exchanger can sufficiently cool the engine, despite exhibiting an air pressure drop six times higher than that of a conventional metal heat exchanger. This resulted in reduced airflow through the heat exchanger; however, its overall efficiency remained high. The study demonstrates that using a polymeric heat exchanger in a passenger car can reduce CO2 emissions by up to 2 g per kilometre, which has significant economic implications in light of European Parliament and Council Regulation 2019/631. The polymeric heat exchanger achieved a maximum thermal performance of 70 kW at a liquid flow rate of 60 L/min and an air velocity of 4 m/s, which is 1.4 times higher than that of a metal heat exchanger. Another advantage is the dependency of the internal heat exchanger flow on liquid temperature. Due to the small internal diameter of the hollow fibres, laminar flow develops, making it sensitive to changes in liquid viscosity as a function of temperature. This results in lower energy demand for the water pump drive at a constant engine RPM.

Polymeric hollow fibre heat exchangers have proven to be suitable for use in passenger car cooling systems. Chassis dynamometer tests and on-road pre-tests were successfully conducted on a third-generation Škoda Octavia equipped with a 1.4 TSI gasoline engine, front-wheel drive, and a six-speed manual transmission. Additionally, the polymeric heat exchanger was evaluated in a calorimetric circuit. All tests confirmed that a polymeric hollow fibre heat exchanger can sufficiently cool the engine, despite exhibiting an air pressure drop six times higher than that of a conventional metal heat exchanger. This resulted in reduced airflow through the heat exchanger; however, its overall efficiency remained high. The study demonstrates that using a polymeric heat exchanger in a passenger car can reduce CO2 emissions by up to 2 g per kilometre, which has significant economic implications in light of European Parliament and Council Regulation 2019/631. The polymeric heat exchanger achieved a maximum thermal performance of 70 kW at a liquid flow rate of 60 L/min and an air velocity of 4 m/s, which is 1.4 times higher than that of a metal heat exchanger. Another advantage is the dependency of the internal heat exchanger flow on liquid temperature. Due to the small internal diameter of the hollow fibres, laminar flow develops, making it sensitive to changes in liquid viscosity as a function of temperature. This results in lower energy demand for the water pump drive at a constant engine RPM.

Automotive cooling; Polymeric hollow fibre heat exchanger; CO2 pollution; Pressure loss coefficient; Aerodynamic drag

Automotive cooling; Polymeric hollow fibre heat exchanger; CO2 pollution; Pressure loss coefficient; Aerodynamic drag

VANČURA, J.; KROULÍKOVÁ, T.; BARTULI, E.; KŮDELOVÁ, T.; VONDRUŠ, J.

13.03.2025

Elsevier

1359-4311

APPLIED THERMAL ENGINEERING

270

126180

United Kingdom of Great Britain and Northern Ireland

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12

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https://www.sciencedirect.com/science/article/pii/S1359431125007720