US Patent 9233792 Tank container

A tank container comprising a container for a liquid to be stored or transported, a pipe circuit comprising a heat transfer circuit part mounted to the wall of the container, which pipe circuit is filled with glycol, a storage vessel connected to the pipe circuit for holding an amount of glycol, a heating device designed for selectively heating the glycol in the pipe circuit, and a pump in the pipe circuit for circulating the glycol, wherein a second heating device is provided in or around the storage vessel, which heating device is designed for maintaining the temperature of the glycol in the storage vessel at at least 25° C., preferably at least 35° c.