LNG 냉열 활용 해수온도차발전 터빈 기본 설계

Abstract

The world is now in high demand for a transition from a carbon economy to a hydrogen economy. This transition requires bridge energy and LNG appears to be the best fit for this role. Although Korea is the second largest LNG importing country in the world, power generation using LNG vaporization heat has not yet been achieved. Therefore, in this study, a study on the design of a turbine, which is one of the key components of a power generation system using LNG vaporization heat and seawater, is conducted. The power generation system uses R32 refrigerant as a working fluid, and an intermediate medium (ethylene glycol) is applied to use LNG cold heat as a heat sink. Turbine design conditions are given through cycle design, and preliminary design is performed using specific speed and specific diameter. As a result of the preliminary design, the maximum efficiency and power are 86.73% and 263.08kW, respectively, when the specific speed is 0.5. This result will be used as basic data for the design of the velocity triangle and turbine geometry.