ACTIVE BUOYANT UREA HEATER

摘要

A variable buoyancy heater is provided. It comprises variable buoyancy float that includes a variable volume element. A first fluid is contained within the variable volume element and a heating element that is integral with the variable buoyancy float is provided. The heater is arranged to heat the first fluid wherein the variable volume element expands based on a temperature increase from the heating element, such that the variable buoyancy float becomes positively buoyant when the variable volume element expands and negatively buoyant when the heating element is off.