JPS6423040A - Method of and apparatus for operating temperature stratification type heat storage tank - Google Patents

Abstract

PURPOSE:To control the formation and growth of an intermediate temperature layer in the boundary area by retrieving the supply heating medium liquid from the boundary area between the high temperature and low temperature zones by following the boundary area as its high level changes in the tank toward the temperature gradient of stored liquid as a result of the change in the stored heat quantity. CONSTITUTION:In response to the downward high level change of the boundary area between the high and low temperature zones in the storage tank as the stored heat is consumed for cooling operation or its upward high level change as a result of replenishment of stored heat while the cooling operation is suspended, a cold water outlet 11 is automatically controlled to be in a position where it is at the level of the boundary area so that the supply cold water for a refrigerating machine 6 may be continuously retrieved from the boundary area regardless of its high level change. When the detected temperature by a temperature sensor 14 becomes higher than the average temperature, a movable water delivery pipe 12 is lowered, and when the detected temperature becomes lower than the average temperature, the movable water delivery pipe 12 is raised so as to maintain the cold water outlet 11 at the level of the boundary layer.