Annular tube heat exchanger

An annular tube heat exchanger, comprising:

• a heating chamber for providing a source of heat, the heating chamber including at least one opening;
• at least one annular heat exchange tube having an inner portion and an outer portion, the inner portion in thermal contact with the fluid, the outer portion in fluid communication with the heating chamber;
• and
• an exhaust chamber in fluid communication with the outer portion of the at least one annular heat exchange tube,
• wherein the heat from the heating chamber passes between the outer portion and the inner portion of the at least one annular heat exchange tube, and wherein the heat from the at least one annular heat exchange tube passes through the exhaust chamber, thereby causing an increase in a temperature of the fluid.

An annular tube heat exchanger immersed in a medium, comprising:

• a heating chamber for providing a source of heat, the heating chamber including at least one opening;
• a plurality of heat exchange tubes, each heat exchange tube including an inner tube disposed within an outer tube forming a gap therebetween, the outer tube including at least one opening for allowing the heat from the heating chamber to flow between the inner tube and the outer tube, the inner tube being open-ended to allow he medium to flow therethrough;
• and
• an exhaust chamber including at least one opening for allowing the heat from one of the plurality of heat exchange tubes to flow therethrough,
• wherein the heat from the heating chamber causes an increase in a temperature of the medium.