Dac apparatus

A DAC apparatus configured to recover CO2 in the atmosphere, comprising:

• a heat pump configured to transfer heat from a low-temperature heat medium to a high-temperature heat medium to raise a temperature of the high-temperature heat medium to a target temperature, the low-temperature heat medium cooling an adsorbent for adsorbing or absorbing CO2, the high-temperature heat medium heating the adsorbent;
• a high-temperature-side heat exchanger provided on a high-temperature-side flow passage through which the high-temperature heat medium flows and configured to cool the high-temperature heat medium through heat exchange with outside air;
• a high-temperature-side control valve provided on the high-temperature-side flow passage and configured to switch whether to pass through or bypass the high-temperature-side heat exchanger;
• and
• a controller configured to control the high-temperature-side control valve, wherein
• the controller controls the high-temperature-side control valve to pass through the high-temperature-side heat exchanger when a temperature of the low-temperature heat medium is equal to or higher than a predetermined temperature.