Heat utilization system, and heat generating device

A heat utilization system comprising:

• a heat-generating element configured to generate heat by occluding and discharging hydrogen;
• a sealed container accommodating the heat-generating element;
• a gas introduction unit configured to introduce a hydrogen-based gas into the sealed container;
• a gas discharge unit configured to discharge the hydrogen-based gas inside the sealed container to an outside of the sealed container;
• a temperature sensor configured to detect a temperature of the heat-generating element;
• a heat generating cell provided in the gas introduction unit and including a heater configured to heat the heat-generating element by heating the hydrogen-based gas circulating through the gas introduction unit;
• and
• a control unit configured to control a temperature of the heat-generating element by controlling the heater based on the temperature detected by the temperature sensor, wherein
• the sealed container has a first chamber and a second chamber partitioned by the heat-generating element,
• the first chamber and the second chamber have different hydrogen pressures,
• the heat-generating element includes a support element made of at least one of a porous body, a hydrogen permeable film, and a proton conductor, and a multilayer film supported by the support element, and
• the multilayer film has a first layer made of a hydrogen storage metal or a hydrogen storage alloy and having a thickness of less than 1000 nm and a second layer made of a hydrogen storage metal different from that of the first layer, a hydrogen storage alloy different from that of the first layer, or ceramics and having a thickness of less than 1000 nm.

A heat generating device comprising:

• a heat-generating element configured to generate heat by occluding and discharging hydrogen;
• a sealed container having a first chamber and a second chamber partitioned by the heat-generating element;
• and
• a temperature adjustment unit configured to adjust a temperature of the heat-generating element, wherein
• the first chamber and the second chamber have different hydrogen pressures,
• the heat-generating element includes a support element made of at least one of a porous body, a hydrogen permeable film, and a proton conductor, and a multilayer film supported by the support element, and
• the multilayer film has a first layer made of a hydrogen storage metal or a hydrogen storage alloy and having a thickness of less than 1000 nm and a second layer made of a hydrogen storage metal different from that of the first layer, a hydrogen storage alloy different from that of the first layer, or ceramics and having a thickness of less than 1000 nm.