【摘要】 基于二元工质水合物相对单一工质水合物在蓄冷特性方面的优越性,在水合物客体组分总质量分数为31.4%的条件下,实验研究了四丁基溴化铵(TBAB)-四氢呋喃(THF)混合水合物蓄冷特性.通过改变TBAB-THF组分配比,考察了水合物的诱导时间、近似相变温度、蓄冷面积及释冷面积的变化.结果表明,TBAB-THF系中TBAB浓度减少使诱导时间增长、温度突变点降低、近似相变温度降低,从而减小了水合物在生长阶段的蓄冷面积,缩短了分解阶段的分解完成时间;TBAB浓度在25.7%～27.4%时,相变温度在6.3～8.0℃之间,与空调冷冻水相近,且释冷面积相对其他浓度较高,可作为蓄冷空调的良好介质.更多还原

【Abstract】 Based on the cold storage superiority of binary gas hydrates to that of singular ones, at the mass fraction of guest materials fixed to 31.4%, the formation-decomposition of tetrabutylammonium bromide(TBAB)-tetrahydrofuran(THF) gas hydrate mixture for cold storage was studied.By changing the concentrations of TBAB and THF, the variations of induction time, decomposition temperature, cold storage capacity area and discharged cold capacity area during the reaction process were compared.It is revealed that the decrease of TBAB can prolong the induction time of crystallization, shorten the transit jump temperature and lower the hydrate decomposition temperature, and the cold storage capacity area is decreased, and the completion time of hydrate decomposition shortened.When TBAB in the solution ranges between 25.7% and 27.4%, the decomposition temperature of samples lies in 6.3～8.0 ℃, which is close to the temperature of air conditioning water, and its discharged cold capacity area is higher than that of other TBAB concentrations.Accordingly, the TBAB solution with 25.7% and 27.4% concentrations may be a promising cold storage material for air conditioning.更多还原