Abstract
A gel ice storage system uses polymer gel as a heat storage substance. The polymer gel keeps the shape as semi-solid of water, and has a large surface of evaporation. The 1kg water vapor evaporation from the gel makes the gel ice of about 7kg at 0℃. A steam ejector evacuates water vapor with motive steams of low temperatures (120〜140℃: under 0.4MPa). We applied the steam ejector to the system to make gel ice. The COP of the experiment was about 0.17 with the motive steam of pressure 0.27MPa and temperature 140℃ during making the gel ice of about 11.5l. We found the following facts; 1) The nozzle exit position in the diffuser is important to get low pressure for the supercooling and making ice. 2) The gel ice storage system with the steam ejector is able to make better use of low pressure steams (0.16MPa to 0.27MPa).
