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 also 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 fluid is recirculated, the secondary heat transfer system comprising
• a heater configured for vaporizing the secondary fluid;
• a reactor heat exchanger positioned within the reactor and in fluid communication with the heater to receive vaporized secondary fluid from the heater;
• a secondary heat exchanger positioned within the volume of the tank for transferring heat to the water in the tank, the secondary heat exchanger in fluid communication with the reactor heat exchanger for receiving liquid secondary fluid that is heated by exothermic adsorption of primary fluid by the sorbate, the secondary heat exchanger also in fluid communication with the reactor heat exchanger to return liquid secondary fluid to the reactor heat exchanger after liquid secondary fluid has transferred heat to the water in the tank.