Radiator Performance Enhancement Using a LiBr-H{sub}2O Absorption Cooler and Microchannel Technology: A Portable Life Support System Example

摘要

Portable life support systems must be capable of performing thermal management in a wide variety of environments. A microchannel-based LiBr-H{sub}2O absorption cooler may make radiator cooling more attractive than water sublimation in high-temperature environments by increasing the temperature and in turn reducing the required surface area of the radiator. This study showed that such a heat pump can lift the radiator temperature from 15°C to 60°C with a coefficient of performance of 0.65 and reduce the radiator area by up to 60%. Proof-of-concept testing using microchannel technology has been demonstrated. This technology should enable the LiBr-H{sub}2O absorption cooler by reducing its overall mass and improving heat and mass transfer rates in the absorber.