Experimental study of the application of air-water two-phase in peltier based cooling systems

Abstract

In recent years, peltier-based cooling systems have been extensively developed in the automotive sector. However, these systems have primarily focused on single-phase fluid flow, utilizing either liquid or gas, while two-phase flow applications have predominantly been explored in industrial heat exchangers. This study aims to investigate the impact of two-phase air-water flow on the performance of peltier-based cooling systems. The research employed an experimental approach, maintaining a constant superficial water velocity of 0.19 m/s, while varying the superficial air velocity at 0 m/s, 3.7 m/s, 7.5 m/s, 11.7 m/s, 15.6 m/s, and 19.5 m/s. Additionally, three different waterblock designs were tested to evaluate their effectiveness in lowering the temperature of the peltier-based cooling system. Visual observations were conducted to identify the flow patterns formed under different combinations of superficial air and water velocities. The experimental results provided data on flow patterns (e.g., no flow patterns, roll waves, pseudo slugs, and entrained droplets), liquid film thickness, temperature reduction for each velocity variation, and the minimum temperature achieved across the three waterblock models. Statistical analysis using multiple linear regression revealed that superficial water velocity had no significant influence, whereas superficial air velocity demonstrated a significant effect. Furthermore, a one-way ANOVA test confirmed a statistically significant difference in the minimum temperatures achieved by the three waterblock designs.