| 초록 |
Natural gas (NG) is continuously attracting attention as an energy source mainly composed of methane. Natural gas is liquefied into liquefied natural gas (LNG) and then regasified to natural gas to be supplied to users at the terminal. The regasifiers include ORV, SCV, and AAV. Among them, ambient air vaporizer (AAV) is LNG regasification technology using air as a heat source. AAV is eco-friendly and offers reasonable price and high operating efficiency. However, in the process of transferring thermal energy from air to LNG, the water vapor contained in the air condenses on the AAV due to the cryogenic temperature of the LNG. These frosts act as a resistance to interfere with the heat transfer of air and LNG, thereby lowering the LNG regasification efficiency. Therefore, for the design of AAV and its application to LNG regasification, it is necessary to understand how frost is formed in AAV. However, research on AAV and studies on frost growth in AAV are lacking. Therefore, in this study, frost growth is modeled by CFD, and this model is applied to AAV to analyze frost growth in AAV. |
