Systems and methods to enhance intake air flow to a gas turbine engine of a hydraulic fracturing unit

A power assembly to provide power to a hydraulic fracturing unit, the hydraulic fracturing unit including a driveshaft to connect to a hydraulic fracturing pump, a transmission to connect to a gas turbine engine for driving the driveshaft and thereby the hydraulic fracturing pump, the power assembly comprising:

• an enclosure to connect to and be supported by a platform;
• and
• a gas turbine engine positioned in the enclosure and to be connected to the hydraulic fracturing pump via the transmission and the driveshaft;
• the enclosure comprising:
• a main housing comprising a main housing wall to connect to a platform to support the enclosure and the gas turbine engine;
• an intake expansion assembly to enhance intake air flow to the gas turbine engine, the intake expansion assembly comprising:
• an intake expansion wall defining a plurality of intake ports positioned to supply intake air to the gas turbine engine positioned in the enclosure comprising:
• a first end defining an expansion perimeter positioned to fit one of inside or outside the upper perimeter of the main housing;
• a second end opposite the first end, a roof panel connected to the second end of the intake expansion wall and enclosing the second end of the intake expansion wall;
• and
• one or more actuators connected to the main housing and the intake expansion assembly and positioned to cause the intake expansion assembly to move relative to the main housing between a first position preventing air flow through the plurality of intake ports and a second position providing air flow through the plurality of intake ports to an interior of the enclosure.

A method for operating a gas turbine engine positioned in an enclosure comprising a main housing and an intake expansion assembly comprising:

• a first end defining an expansion perimeter positioned to fit one of inside or outside the upper perimeter of the main housing;
• a second end opposite the first end, the intake expansion assembly defining a plurality of intake ports to supply intake air to the gas turbine engine when positioned in the enclosure;
• and
• a roof panel connected to the second end of the intake expansion assembly and enclosing the second end of the intake expansion assembly;
• the method comprising:
• activating one or more actuators to cause the intake expansion assembly to move relative to the main housing from a first position preventing air flow through the plurality of intake ports to a second position providing air flow through the plurality of intake ports to an interior of the enclosure;
• receiving one or more position signals from one or more sensors configured to generate signals indicative of a position of the intake expansion assembly relative to the main housing;
• determining, based at least in part on the one or more position signals, whether the intake expansion assembly is in the second position;
• and
• initiating operation of the gas turbine engine when the intake expansion assembly is in the second position.