Investigates thermo-hydraulic performance in heat exchangers, highlighting implications for efficiency improvements.
This study investigates thermo-hydraulic and second-law performance of ethylene glycol – water (EG/W) mixtures in a heat exchanger tube with conical wire inserts. Experiments were performed under turbulent conditions for Re = 3300– 21,000 using three EG/W ratios and five insert spacings. Nusselt number, friction factor, THPF, entropy generation number, Bejan number, and second-law efficiency were evaluated. Increasing EG content enhanced Nusselt number but increased frictional irreversibility. Maximum entropy generation (0.9221) occurred for CW-0 with 40:60 EG/W at Re = 21,000, whereas maximum second-law efficiency (0.428) was obtained for CW-0 with water at Re = 3300.
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Fatma Oflaz (2026) studied this question.
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