Diaphragm compressor system and method

A roll-diaphragm compressor comprising:

• a compressor body including:
• a concave portion that defines a rounded convex interface wall;
• and
• a planar apex portion adjacent to the concave portion that comprises an inlet and outlet port;
• a flexible roll-diaphragm coupled to the compressor body about a compressor body edge and defining a dome profile, the roll-diaphragm defining a fluid impermeable membrane and comprising a plurality of elongated tensile elements extending radially from a diaphragm central portion toward an edge of the roll-diaphragm, the plurality of elongated tensile elements having a greater tensile strength than the fluid impermeable membrane to reinforce the fluid impermeable membrane;
• a compression chamber defined by the concave portion, the planar apex portion and roll-diaphragm;
• and
• a piston head rigidly coupled to a central portion of the roll-diaphragm at a planar top face of the piston head and defining a planar central portion of the roll-diaphragm, the piston head configured to drive the roll-diaphragm in a rolling cycle motion including:
• driving the roll-diaphragm in a first stage of a compression cycle to have rolling engagement of the roll-diaphragm against the rounded convex interface wall with the compression chamber having a first volume, and
• driving the roll-diaphragm in a second stage of the compression cycle with compression chamber having second volume that is less than the first volume and close to or nearly zero, with the roll-diaphragm substantially fully engaged with the rounded convex interface wall and with the planar top face of the piston head and the planar central portion of the roll-diaphragm residing within the planar apex portion of the compression body.