Operating portable cold box by keeping moisture frozen using coolant with aggregate state change from solid to liquid at temperature at least ten degrees Celsius below melting temperature of ice

摘要

The method involves maintaining the accumulating moisture in the frozen state. A coolant is used whose aggregate state change from solid to liquid occurs at a temperature at least ten degrees Celsius below the melting temperature of ice. The coolant is glycol. which can be frozen and/or pumped.