| 摘要 |
PURPOSE:To provide a heat storage tank which yields a high heat storage efficiency by employing a length of a flexible tube that opens in the upper part of a high- temperature side water tank and suspending the open end of it at a certain distance from the water surface in the water body by means of a float that floats on the water surface in the water tank so as to stabilize the water flow. CONSTITUTION:A flexible tube 8 has at its open end a ring 10 which is suspended from a float 11 by a suspension rope 12. As cold water supplied through a pipe 16 is fed to the bottom of a water tank 2a, it replaces lukewarm water. When the boundary between cold water and lukewarm water rises as high as the level of the open end ring 10 of the tube 6, the cold water flows into the lower layer in a water tank 2b. The replacement of lukewarm water by cold water takes place between the upper and lower layers in a water tank and between the water tanks, and the water temperature becomes highest at the upper layer of the final water tank 2h. The distance (d) of the open end of the tubes 17, 6 from the water surface is constant regardless of the water level. Therefore, the velocity (v) of water flowing out never exceeds a predetermined value. Thus, the water flow can steadily be controlled to improve the heat storage efficiency.
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