Abstract: Suction accumulator structure and method. The structure comprises an outer cylindrical tank having a top and a bottom, a short tube extending through the top of the tank for passage of gaseous phase change material into the tank, a small diameter elongated tube extending into the tank through the top thereof substantially to the bottom of the tank, a large diameter tube having a substantially closed bottom, and an open top sleeved over the small diameter tube, a hollow coil spirally positioned and in radially spaced relation to the large diameter tube and means for passing a heated, heat transfer medium through the coil. The method of the invention comprises wrapping a coil around the suction tube of a suction accumulator and passing a heated heat transfer medium therethrough whereby liquid phase change material within the suction tube which may be metered into the suction tube is vaporized prior to passage out of the suction accumulator.