液態氮增壓系統定量瓶尺寸與液氮殘留量探討

Abstract

綠能的快速發展使儲能系統的需求急速提升。以液態氮作為儲能媒介安全可靠，且液態氮的製備技術已成熟，僅需發展復能系統從液態氮中提取能量。本研究發展一低磨耗、反應快、吸收廢熱且下游壓力較上游壓力高的液氮增壓系統並成功增壓，在8bar注射壓力產生16bar的鍋爐壓力。本研究另外建立了一套以水替代液氮的實驗精準測量注射水量和注射後管路殘留水量，並發展了一套利用質量精準代換替代實驗和液氮增壓實驗的方法。替代實驗中，16bar注射壓力注射較細長的定量瓶有較低的殘留量。替代實驗的結果經由質量代換方法，可得不同尺寸的定量瓶在不同注射壓力下的注射量以及注射的能量轉換效率，提供未來擴建系統的參考。

The rapid growth of green energy comes with significant demand for energy storage systems. Liquid nitrogen as an energy storage material is safe and reliable, and the air separation industry is mature. Extracting energy from liquid nitrogen is the only thing that awaits. This study develops a liquid nitrogen pressurized system with benefits like low wear, low response time, absorbing waste heat, and higher pressure downstream. This research builds an LN2 Pressurize System, which successfully produces 16 bar boiler pressure with 8 bar injecting pressure. This research also built the Substitution Experiment, which replaces LN2 with water to get the precise amount of injected water and remaining water. Furthermore, a method turns the injecting water weight into injecting LN2 weight. From the result of the Substitution Experiment, 16 bar injecting pressure with a slender quantitative bottle results in less remaining water. The results of the substitution experiment and the mass substitution method reveal the injection volume of different sizes of quantitative bottles under different injection pressures and the energy conversion efficiency of the injection, providing a reference for future expansion of the system.