Temperature change characteristic and thermal storage ability of barium hydroxide octahydrate and paraffin during thermal storage are compared, and the heat release ability in the low temperature of barium hydroxide octahydrate under low temperature is studied. The results show that compared with paraffin, barium hydroxide octahydrate has better heat conductivity and latent heat of fusion, which make it has faster and greater transient heat-absorption capacity, furthermore, it shows superior thermal storage capacity in greater temperature difference; barium hydroxide octahydrate has obvious function in temperature rise during heat release under low temperatures, and has more heat release in lower temperature environment.%比较了石蜡和八水氢氧化钡两种材料在蓄热过程中的温变特性和吸热能力,并研究了低温环境下八水氢氧化钡蓄热器在放热过程中的低温释热性能.结果表明,与石蜡相比,八水氢氧化钡蓄热材料更高的导热性能和熔解潜热使它具有更快和更大的瞬时吸热能力,并在初期的大温差下显现出更好的蓄热特性:八水氢氧化钡用于低温环境释热过程的温升作用显著,且在更低的低温环境下具有相对较高的放热总量.
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