Stored winter cold in snow and ice is used for cooling during the summer, one alternative electricity use. In Japan, this snow and ice use system is employed in about 140 buildings. Of this, 117 buildings are using snow, and 14 buildings are using ice. Collecting snow or ice only for cooling is too much expensive. Therefore, ice-using systems need making ice artificially at cold climate. In Sweden, for artificial ice making, the snow gun is used at very cold climate. In Japan, average temperature is relatively high, the two-fluid nozzle has low coefficient of performance and high cost problems. So, we tested for efficiency of making ice using one-fluid nozzle at indoor and outdoor. Ice production rate was 78% at outdoor -6 centigrade. In Hokkaido, initial costs estimation of one-fluid nozzle is lower than chiller.
