A power generation system comprising: a turbine engine comprising a compressor, at least one nozzle coupled to said compressor, and an exhaust section coupled to said at least one nozzle; and a flow control system comprising: a flow control valve coupled to first and second fluid conduits (210,216) for regulating fluid flow in one of a first direction and a second direction, wherein in the first direction the fluid is channeled from the compressor to the at least one nozzle via the first fluid conduit and wherein in the second direction the fluid is channeled from the at least one nozzle via the second fluid conduit to the exhaust section of the turbine engine; and a controller coupled to said flow control valve, said controller configured to control the flow control valve so as to: control the fluid flow in the first direction during normal operation of the turbine engine to facilitate cooling of turbine engine; and change the direction of the fluid flow from the first direction to the second direction to facilitate reconditioning of the turbine engine during start up and/or shut down of the turbine engine. a turbine engine comprising a compressor, at least one nozzle coupled to said compressor, and an exhaust section coupled to said at least one nozzle; and a flow control system comprising: a flow control valve coupled to first and second fluid conduits (210,216) for regulating fluid flow in one of a first direction and a second direction, wherein in the first direction the fluid is channeled from the compressor to the at least one nozzle via the first fluid conduit and wherein in the second direction the fluid is channeled from the at least one nozzle via the second fluid conduit to the exhaust section of the turbine engine; and a controller coupled to said flow control valve, said controller configured to control the flow control valve so as to: control the fluid flow in the first direction during normal operation of the turbine engine to facilitate cooling of turbine engine; and change the direction of the fluid flow from the first direction to the second direction to facilitate reconditioning of the turbine engine during start up and/or shut down of the turbine engine. a flow control valve coupled to first and second fluid conduits (210,216) for regulating fluid flow in one of a first direction and a second direction, wherein in the first direction the fluid is channeled from the compressor to the at least one nozzle via the first fluid conduit and wherein in the second direction the fluid is channeled from the at least one nozzle via the second fluid conduit to the exhaust section of the turbine engine; and a controller coupled to said flow control valve, said controller configured to control the flow control valve so as to: control the fluid flow in the first direction during normal operation of the turbine engine to facilitate cooling of turbine engine; and change the direction of the fluid flow from the first direction to the second direction to facilitate reconditioning of the turbine engine during start up and/or shut down of the turbine engine. control the fluid flow in the first direction during normal operation of the turbine engine to facilitate cooling of turbine engine; and change the direction of the fluid flow from the first direction to the second direction to facilitate reconditioning of the turbine engine during start up and/or shut down of the turbine engine.