Hybrid systems and methods for managing thermal energy

A method of managing the temperature of a room, the method comprising

• (a) arranging a thermal energy management system in thermal communication with an interior of a room, the thermal energy management system comprising
• (i) an active thermal storage battery comprising
• (A) an insulated container defining an interior volume,
• (B) a heat exchanger comprising a plurality of heat exchange plates disposed within the interior volume of the container, and
• (C) a first phase change material disposed within the interior volume of the insulated container and in thermal contact with the plurality of heat exchange plates of the heat exchanger, and
• (ii) at least one passive thermal storage battery comprising a plurality of thermal storage cells, each individual thermal storage cell comprising
• (A) a container having an interior volume, and
• (B) a second phase change material disposed within the interior volume of the container without a heat exchanger being disposed therein, wherein an exterior surface of the container defines one or more openings for air flow through the container between opposite sides of the container for heat exchange directly between the air flow and the exterior surface of the container;
• and
• (b) initiating a discharging state to maintain or reduce a temperature of the interior of the room by changing the first phase change material from a first phase of the first phase change material to a second phase of the first phase change material, including causing a fluid to flow through the heat exchange plates and between the heat exchanger and a fan coil connected in fluid communication with the heat exchanger.