Cold Heat Storage Performance of Amine/Water Solutions

Abstract

With a view to utilizing the cold heat of Liquid Natural Gas, candidates for cold storage media, which store cold heat in a temperature range between -20 to -50°C as latent heat, are investigated. Amine/water binary solutions are found to be promising candidates. A liquid/solution equilibrium experiment shows eutectic character of these solutions. Ametylamine/water solution is expected to be the lowest temperature cold heat storage media, and is examined in a phase change characteristic experiment. The solution generats dendrite crystals in the first phase change. The generated liquid/solid solution shows eutectic slurry character. Based on the experimental results, the possibility of using the eutectic solution as a fluid high-density cold storage media is discussed.