Design of a Visualization System of Flow Boiling in a Vertical Tube with a Sulfuric Acid

The demands of hydrogen energy are growing interest in using alternative energy to fossil fuel. Hydrogen offers many opportunities as one of future clean energy in economical and environmental issues. Many researchers have actively studied development of the hydrogen production. Very High Temperature gas cooled nuclear Reactor (VHTR), which was coupled with Sulfur-Iodine (SI) thermo-chemical cycle, has been selected for the Nuclear Hydrogen Development and Demonstration (NHDD) project in Korea Atomic Energy Research Institute. Kim et al. are developing a hybrid heat exchanger as a Process Heat Exchanger (PHE) for the sulfur trioxide decomposition. Hong et al. constructed a small scale sulfuric acid loop for the performance tests. In this study, we discussed the design for the visualization system of flow boiling in a vertical single tube under atmosphere pressure condition