Working medium pair suitable for cross-seasonal three-phase absorption type energy storage circulation and preparation method thereof

Abstract

The invention discloses a working medium pair suitable for cross-seasonal three-phase absorption type energy storage circulation and a preparation method of the working medium pair. The working medium pair comprises a lithium chloride aqueous solution, ethylene glycol, silicon dioxide nanoparticles and Arabic gum. According to the preparation method, ethylene glycol, silicon dioxide nanoparticles and Arabic gum are added into a traditional LiCl/H2O working medium pair, so that the working concentration range of a LiCl aqueous solution is widened, the solubility of LiCl in water is improved, the solubility of LiCl in a high-concentration state is increased, stable suspended fine crystals can be formed in the solution after the concentration of LiCl exceeds the solubility, and the stability of the LiCl in the solution is improved. And the risk caused by crystallization is greatly reduced while the energy storage density is improved. The working medium pair can be used within the heat source temperature range of 75-90 DEG C, has the capacity of supplying cold and heat at the same time, and can output cold water with the temperature of 5-20 DEG C and hot water with the temperature of 40-50 DEG C. 本发明公开一种适用于跨季节三相吸收式蓄能循环的工质对及其制备方法。所述工质对包括：氯化锂水溶液、乙二醇、二氧化硅纳米颗粒和阿拉伯树胶。本发明通过在传统LiCl/H<subgt;2</subgt;O工质对中加入乙二醇、二氧化硅纳米颗粒和阿拉伯树胶，拓宽了LiCl水溶液的工作浓度范围，提升了LiCl在水中的溶解度，增大了LiCl在高浓度状态下的溶解度，并且在LiCl浓度超过溶解度之后，能够在溶液中形成稳定悬浮的细小晶体，在提升蓄能密度的同时，大大降低了结晶带来的风险。该工质对可以在热源温度范围为75～90℃内使用，具有同时供冷供热的能力，可输出温度为5～20℃的冷水和40～50℃的热水。