| 摘要 |
PROBLEM TO BE SOLVED: To effect proper heat exchanges in a heat exchange system, where an additive is added to a base fluid to obtain a mixed fluid, and the mixed fluid is used as one fluid in the heat exchange system. SOLUTION: A heat exchange method exchanges heat between the mixed fluid of the base fluid and the additive and a thermal fluid disposed opposite with a wall face between them. In fluid friction, simplified with respect to the product of a pressure loss dp0 of a sole fluid in a mixed fluid flow and a characteristic length D of the mixed fluid flow, a reduction-occurring region, where decrease of fluid friction is recognized and which is a range of a product of a pressure loss of the base fluid and the characteristic length, is derived in advance, and then a product value which is the product of a pressure loss of the base fluid occurring in the mixed fluid flow with a characteristic length of the mixed fluid flow is maintained higher than the decrease-occurring region. |
