Thermal management using endothermic heat sink

A method for managing heat transfer of a thermal load, the method comprising:

• providing a thermal management system comprising a heat exchanger reactor containing an expendable heat absorption material, the thermal management system comprising
• a slurry generator comprising a gravimetric feeder, a mixer, and a charge pump, wherein the gravimetric feeder meters the heat absorption material into the mixer, and the charge pump meters a carrier fluid into the mixer, wherein the mixer suspends the heat absorption material in the carrier fluid to make a slurry;
• an injector pump fluidly coupled to the slurry generator;
• a heat exchanger reactor fluidly coupled to the injector pump, the heat exchanger reactor receiving the slurry from the injector pump, wherein the heat exchanger reactor is adapted to subject the expendable heat absorption material to a temperature above 60° C. and a pressure below 3 kPa, and wherein the expendable heat absorption material endothermically decomposes into a gaseous by-product;
• and
• a vapor cycle system coupled to the heat exchanger reactor and operatively connected to the thermal load;
• applying heat from the thermal load to the thermal management system at a temperature between approximately 18-30° C. using a thermal load coolant;
• transferring heat from the thermal load to a transfer fluid at a temperature above approximately 60° C. creating a heated transfer fluid, wherein the heated transfer fluid is introduced into the heat exchanger reactor;
• transferring heat from the heated transfer fluid into the expendable heat absorption material, wherein the expendable heat absorption material endothermically decomposes into the gaseous by-product;
• and
• maintaining the thermal load coolant within a specified temperature range independent of heat load dynamics.