Analysis of Operational Energy Intensity in LNG Vaporizers Design via Decomposition Method

In LNG process chain, a huge amount of operational energy was consumed especially by LNG regasification process. Therefore, the reduction of energy consumption by vaporizer systems is necessary to significantly reduce the costs, without reducing the energy performance. In this project, energy intensity are employed as the indicator of changes in energy efficiency of vaporizer system. .However, it is very crucial to analyze the energy intensity of a complex vaporizer system. Thus, this project used a decomposition method which is found to be an effective way to simplify the complex vaporizer system. This project proposed to reduce the amount of energy intensity of LNG vaporizer designs. Thus, a few analysis has been carried out on the system performance in order to evaluate the best LNG vaporizer technology to be optimized subsequently. Aspen Hysys software is used to simulate and analyze an optimized vaporizer design. The result show that Open Rack Vaporizer consume the lowest amount operational energy intensity compared to the other type of vaporizer. For an optimum condition of ORV, this project proposed the LNG injection pressure in ORV to be at 4 barg with E-100 discharge temperature is more than saturation temperature, -60.28 C.As a result, energy intensity of LNG vaporizer can be reduced up to 3.45 Wh/kg with maximum amount of 1st and 2nd Law Efficiency which is 99.10% and 94.99% respectively