| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cooling liquid not requiring a large-sized apparatus on use, having small influence on human bodies and environment when used and when discarded and causing little contamination to the apparatus. <P>SOLUTION: This cooling liquid comprises water and an antifreezing protein and has a freezing point lower than that of water. Since heat conductivity of the cooling liquid containing water and the antifreezing protein is higher than that of a cooling liquid containing glycols, or the like, a heat exchanger used when the cooling liquid containing water and the antifreezing protein is used as a cooling liquid for engines can be down-sized and reduction of size of whole apparatus and reduction of cost required for apparatus are made possible. Since COD (chemical oxygen demand) value of the cooling liquid containing water and the antifreezing protein is smaller than that of the cooling liquid containing glycol, or the like, influence on the environment when discarded is small. Further, the antifreezing protein has no toxicity to human bodies. Since freezing point of water is lowered not by salts, or the like, but by the antifreezing protein, contamination of the apparatus is reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
