| 摘要 |
PROBLEM TO BE SOLVED: To provide a compsn. contg. trimethylol ethane (A), water (B), and a compd. having a sulfonyl group in a moleclule (C), and having a phase transition point near room temp., a large heat accumulation density, and an excellent repetition stability without phase separation. SOLUTION: For component C, saccharin sodium, sulfosalicylic acid, and sulfolane are suitable. The contents of each component are component A: 20-80 wt.%, component B: 19-50 wt.%, and component C: 1-50 wt.%, and weight ratio of component A to component B (A/B) is pref. 75/25-50/50. Phase transition point which indicates the greatest latent heat is pref. 5-15 deg.C. The phase transition point of trimethylol ethane/water system heat accumulator is controlled to a desired temp. by adding a water soluble org. compd. having at least one non-covalent electron pair in a molecule to the mixture of trimethylol ethane and water. This accumulator compsn. has a phase transition point of 5-25 deg.C and is used favorably as a passive type heat accumulator or a cold accumulator in the field of construction material. |
