| 摘要 |
PURPOSE:To enhance heat exchange efficiency by a method wherein, in a device wherein a phase-changeable material which is insoluble in an aqueous medium and melts at a temperature higher than that of the medium is dispersed in the aqueous medium to form a dispersion liquid for use as heat storage material, the a mount of the dispersion liquid is detected to control a feed water means. CONSTITUTION:A heat exchanger 11 of a heat source (heat pump) 12 is provided in a heat storage tank 1 accommodating a heat storage material 15 and a heater 14, as an auxiliary heat source, is provided. In heat storage layers 15, a dispersion liquid is used, in which a dispersion phase (paraffin, fats and oils, etc.) is dispersed in a continuous phase (aqueous solution of ethylene glycol, water, etc.), said dispersion phase having melting point higher than that of the continuous phase. In a cooling operation, the material 15 is cooled to a temperature lower than the melting point of the dispersion phase by means of the exhanger 11 being an evaporator and the material 15 is sent to a radiator 9 by a pump 9 to obtain cold air. On the other hand, in a heating operation, the material 15 is heated by the exchanger 11 and heater 14 and the material 15 is sent to the radiator 9 to obtain hot air. In this case, the amount of continuous phase which is easily evaporated from the material 15 is detected from the output of a water level sensor 2 to control the introduction of city water using a cross valve 3. |
