Abstract: Purge systems for heating, ventilation, air conditioning, and refrigeration (HVACR) circuits in chillers can use adsorbent and/or membranes to separate refrigerant from non-condensable gases, allowing the non-condensables to be exhausted while the working fluid can be recovered and returned to the HVACR circuit. The purge systems can include one or more separation chambers including either an adsorbent material or a selectively permeable membrane. The selectively permeable membrane can be solubility-based for its selectivity. Optionally, a pusher pump can be upstream of the separation chambers to pressurize the purge gas through the purge system, including in the separation chamber. The purge system can be controlled using a model correlating pressure differentials in the purge system with purge gas conditions such as non-condensable and working fluid concentrations.

Abstract: A method for manufacturing a cured resin impregnated substrate comprising placing a substrate into a impregnation zone including a solvent containing curable resin to produce a resin impregnated substrate and at least partially curing the resin impregnated substrate to produce a cured resin impregnated substrate, wherein the number of voids in the cured resin impregnated substrate are reduced by processing the substrate in at least one processing step that reduces the number of voids in the cured resin impregnated substrate product.