Cryogenic boiler

A cryogenic boiler system comprising:

• a boiler tank to receive a cryogenic gas;
• a first recirculation loop that includes the boiler tank, a first blower, and a heat exchanger, wherein the heat exchanger is configured to add heat to the first recirculation loop to heat the cryogenic gas;
• a preliminary tank to receive a cryogenic liquid from a main tank, wherein
• the preliminary tank is configured to convert the cryogenic liquid to the cryogenic gas by, at least in part, volume expansion, and
• the preliminary tank is located between the main tank and the boiler tank and is configured to provide the cryogenic gas to the boiler tank;
• and
• a second recirculation loop that includes the preliminary tank and a second blower.

A method of operating a cryogenic boiler system, the method comprising:

• transferring a cryogenic liquid from a main tank to a boiler tank wherein the cryogenic liquid is converted to a gas;
• adding heat, via a heat exchanger, to a flow of the gas in a recirculation loop that includes the boiler tank and a blower;
• and
• blowing the gas in the recirculation loop into the boiler tank.