Proposal and performance analysis of a bionic body liquid cooling garment based on body temperature distribution

Liquid cooling garments (LCGs) significantly safeguard the human body's core temperature and mitigate heat damage in a hot environment. However, the heat dissipation feature of the human body has rarely been considered in related research. Moreover, limited studies have optimized the pipeline structure of the coolant. In this study, an experiment is first performed to measure the temperature distribution of the human torso. According to the results, the T-shaped region division can significantly characterize the temperature distribution among three potential proposals (p < 0.01). On this basis, a bionic leaf vein structure of LCGs is then proposed and simulated. The bionic structure demonstrates superior thermal uniformity. Compared with the traditional L-shaped and S-shaped designs, the biomimetic design reduces the standard deviation of temperatures by 0.87 °C and 0.58 °C, respectively. Subsequently, Morris analysis is conducted to search for the most important parameters (inlet flow temperature, velocity, and tube diameters). Finally, global sensitivity analysis is applied to discuss the influence of the selected three parameters. Under the conditions of a pipeline diameter of 4.2 mm, an inlet flow velocity of 0.02 m/s, and an inlet temperature of 27 °C, the model achieved an average temperature of 32.05 °C, a temperature standard deviation of 0.38 °C, and a power consumption of 16.01 W.