Patent ID: 6875256

Claim:
A filter structure for filtering air in a gas turbine intake system, the turbine operating at an intake air demand greater than 8000 ft 3 -min −1 , the intake air having an ambient temperature and a humidity of at least 50% RH, the structure comprising, in an air intake of a gas turbine system, at least one filter element, the filter element having a media pack forming a tubular construction defining a open filter interior; the open filter interior being a clean air plenum, the media pack including a pleated construction of a media composite, the media composite including a substrate at least partially covered by a layer of fine fibers, the fine fibers comprising a polymeric composition comprising an addition polymer or a condensation polymer other than a copolymer formed from a cyclic lactam and a C 6-10 diamine monomer or a C 6-10 diacid monomer combined with an additive material.