| 摘要 |
PURPOSE:To increase heat accumulation density with small size and to easily manufacture a heat accumulator by composing of inner and outer double tubes, forming one of both the tubes in a heat accumulating material vessel for containing a heat accumulation material made of salt hydrate therein and the other in a operating fluid vessel having inlets and outlets at the ends in which operating fluid flows. CONSTITUTION:Both ends of a heat accumulating material vessel 1 are closed by plugs 18, and a heat accumulating material made of salt hydrate such as sodium acetate trihydrate (CH3COONa-45 wt.% H2O) is contained therein. Spiral fins 19 in which styluslike fins are spirally wound are attached to the outer surface of the operating fluid vessel 2, and operating fluid such as engine cooling water flows around the heat accumulating material vessel 1 in the operating fluid vessel 2. The bent parts of both the ends are supported by brackets 20, and a heat exchanger of considerable length is composed of the heat accumulating material vessel 1 composed of inner and outer double tubes and the operating fluid vessel 2. Thus, since the quantity of the heat accumulating material per unit volume or unit weight of the heat exchanger is large, a large quantity of heat can be accumulated when the heat accumulating material is melted, and a large quantity of heat can be efficiently radiated when the heat accumulating material is crystallized from its overcool state. |
