Experimental Research on a New Vaporization of LNG using Flue Gas to Impact Underwater Umbrella Rotor to Enhance Heat Transfer

Abstract

A new LNG heat vaporization technology is developed and experimental researched. The LNG vaporizer use flue gas jet to impact underwater umbrella rotor at high speed, and form rotating air flow including steam and water drop. When wet flue gas flow through heat exchanger, heat transfer is enhanced because of water phase change. The vaporizer also uses flue gas cycling system to enhance heat transfer of LNG, efficiently reduce exit temperature of flue gas and increase heat efficiency. The vaporizer is designed as upper and lower coils to vaporize and reheat LNG. Thermal efficiency and convection heat transfer coefficients of LNG inside upper and lower coils, wet flue gas outside upper coils and water outside lower coils are experimental obtained.