Water heater with integrated sorption reactor

A water heater, comprising:

• a tank having a volume for storing water, the tank also defining a cavity;
• a primary fluid;
• a primary heat transfer system in which the primary fluid is recirculated, the primary heat transfer system comprising:
• a reactor located within the cavity;
• a sorbate located within the reactor;
• a primary heat exchanger positioned within the volume of the tank and in fluid communication with the reactor to receive vaporized primary fluid that is endothermically desorbed from the sorbate;
• an evaporator in fluid communication with the primary heat exchanger to receive primary fluid condensed in the primary heat exchanger, the evaporator in fluid communication with the reactor to provide primary fluid vaporized by the evaporator to the reactor;
• a secondary fluid;
• a secondary heat transfer system in which the secondary heat transfer fluid is recirculated, the secondary heat transfer system comprising:
• an auxiliary heat exchanger positioned within the reactor and configured for transferring heat energy to the secondary fluid;
• a secondary heat exchanger positioned within the volume of the tank and configured for transferring heat from the secondary fluid to the water in the tank, the secondary heat exchanger in fluid communication with the auxiliary heat exchanger and configured to receive liquid secondary fluid from the auxiliary heat exchanger that is heated by exothermic adsorption of primary fluid by the sorbate, the secondary heat exchanger also configured to return to the auxiliary heat exchanger liquid secondary fluid that has transferred heat to the water in the tank;
• a charging fluid;
• a charging heat transfer system in which the charging fluid is recirculated, the charging heat transfer system comprising
• a heater configured for vaporizing the charging fluid;
• a reactor heat exchanger positioned within the reactor and in fluid communication with the heater, the reactor heat exchanger configured to receive vaporized charging fluid from the heater and return condensed charging fluid to the heater,
• wherein the auxiliary heat exchanger and the reactor heat exchanger are in direct thermal communication within the cavity.