| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat transportation medium capable of reducing the effects on corrosion even when a metallic piping is used. <P>SOLUTION: The heat transportation medium is used for a heat transportation system for circulating the heat transportation medium between a heat-supplying side system and a heat-utilizing side system through a supplying side passage and a returning side passage. The heat transportation medium is obtained by adding a quaternary ammonium salt-type surfactant represented by the molecular formula: RN<SP>+</SP>((CH<SB>2</SB>)<SB>l</SB>OH)((CH<SB>2</SB>)<SB>m</SB>OH)((CH<SB>2</SB>)<SB>n</SB>OH)-A<SP>-</SP>(wherein, R is 8-22C alkyl or alkenyl; A<SP>-</SP>is an organic acid ion; and l, m and n are each 1-4) to an aqueous liquid, wherein the proportion of the moles of a halide ion in the aqueous liquid is ≤0.5 of the added moles of the quaternary ammonium salt-type surfactant. <P>COPYRIGHT: (C)2011,JPO&INPIT |
