LNG Cold Heat Energy Utilization System : Part 2 : Experiments on Air Liquefaction Using a Concrete-type Cool Storage Unit

Abstract

The cool storage material composition of the concrete-type cool storage unit used for the LNG cold heat energy utilization system was determined from the viewpoint of thermal performance. The blending composition for cool storage material was selected as Portland blast furnace cement + sand + air entraining low-water agent + steel fiber. Thermal conductivity was about 20% higher than regular concrete and stainless steel fiber concrete. The liquefaction was examined for conditions assuming an actual plant with the concrete-type cool storage unit. With sufficient insulation treatment, the prospect was good for a stable liquefaction rate of 80% or more.