Method for recovering one or more working fluids using an absorbent

A method for recovering one or more working fluids, the method comprising:

• purging a working fluid system below atmospheric pressure by:
• receiving a mixture of one or more working fluids and one or more non-condensable gases in a separation chamber from a fluid line, the separation chamber containing an adsorbent material,
• adsorbing at least some of the one or more working fluids to the adsorbent material,
• after adsorbing at least some of the one or more working fluids to the adsorbent material, exhausting the mixture through an exhaust port downstream of the separation chamber and in fluid communication with the separation chamber by way of an exhaust valve, wherein the exhausting includes releasing gas into an ambient environment;
• and
• recovering the at least some of the one or more working fluids adsorbed by the adsorbent material by:
• closing a first valve upstream of the separation chamber,
• closing the exhaust valve between the separation chamber and the exhaust port,
• opening a regeneration valve, the regeneration valve being downstream of the separation chamber, the regeneration valve controllable to allow or prevent flow from the separation chamber through a working fluid return line, and
• operating a recovery pump to reduce a pressure within the separation chamber to draw the one or more working fluids from the adsorbent material, the recovery pump being in fluid communication with the separation chamber and with the working fluid return line, the return line in fluid communication with the working fluid system below atmospheric pressure,
• wherein the adsorbent material is selected for releasing adsorbed working fluid from the adsorbent material at temperatures below 100°C when the pressure within the separation chambers is reduced by operation of the recovery pump.