Volume 49

Energy Consumption Analysis of Ionic Liquid Compressors via Lumped Parameter Model Xiang Kang, Zekun Liu, Yuan Lv, Yun Li

Abstract

Ionic liquid compressor is a type of compressors applied in hydrogen refueling stations. It uses ionic liquid (IL) for piston sealing and is driven by a hydraulic system. Previous literature mainly focused on piston motion and pressure variation. However, few studies referred to the influence of IL supplement on energy consumption and capacity. In this study, a lumped parameter model (LPM) of ionic liquid compressors is established. Power proportions of all parts are presented. Moreover, specific power and capacity are obtained under different amounts of IL supplement. Results show that the gas indicated power accounts for the main portion of the shaft power. The powers used for IL flow and hydraulic transmission will increase as the IL supplement amount increases, resulting in a rise in the shaft power. Insufficient and excessive IL supplement can both decrease capacity of compressors. Decreasing IL supplement amount can decrease the shaft power but specific power will rise if there is too little supplement amount.

Keywords ionic liquid compressor, specific energy, liquid supplement, capacity, liquid fraction