在能源及制冷技术领域,高性能的吸收式能量转换系统的开发有待在循环介质方面寻求突破.离子液体因具有“零”蒸汽压、呈液态的温度区间大、稳定、不易燃、室温下可流动等特性,有可能成为优于目前常规的金属盐类(如LiBr等)吸收剂,并与水构成新一代性能优良的吸收工质对.文中采用水溶性离子液体[BMIM] BF4和[BMIM] 2SO4作为研究对象,对它们的热稳定性、流动性、水溶液蒸汽压等进行了实验测试和分析,初步研究了这两类离子液体热工特性,为进一步研究用离子液体作为吸收工质的吸收式热泵和制冷循环提供基础.%Currently in the field of energy and refrigeration, the developing of high-performance absord energy transfer systems may find an breakthrough in the field of ciculate medium. As ionic liquid has the characteristics of "non-detectable" vapor pressure, wide liquid termperature range, stable, non-flammable , fluidness in room temperature, it may become absorbefacient better than metal salts ( for example: LiBr). Combined with water, it may be the new generation of assimilated working pairs that have excellent competences. Water-soluble ionic liquid [BMIM] BF4 and [BMIM]2SO4 as the research objects were chosen to test and analyse their thermal stability, fluidness and vapor pressure of their aqueous solutions by experiments. Based on the thermal properties of these two kinds of ionic liquid, the foundation was built for further research of heat pump and ciculate refrigeration, which used ionic liquid as the absorption workers.
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