Turbine engine exhaust duct system and methods for noise dampening and attenuation

1. An exhaust attenuation assembly to receive exhaust gas from a gas turbine attached to a trailer, the exhaust attenuation assembly comprising:

a lower elongated plenum having a proximal end and a distal end, the lower elongated plenum extending a first distance between the proximal end and the distal end, and having an inlet positioned adjacent the proximal end to receive exhaust gas from the gas turbine;

an upper noise attenuation system movably connected relative to the distal end of the lower elongated plenum, the upper noise attenuation system being selectively movable between a stowed position, in which an outlet end portion of the upper noise attenuation system is positioned proximate the distal end of the lower elongated plenum, and an operative position, in which the upper noise attenuation system defines an upper elongated plenum in fluid communication with the distal end of the lower elongated plenum and in which an outlet of the upper elongated plenum is spaced away from the distal end of the lower elongated plenum at a second distance that is greater than the first distance, the upper noise attenuation system also including an elongated conduit configured for complementary receipt in a distal portion of the lower elongated plenum and a pair of opposed silencer hoods,

each of the pair of opposed silencer hoods including a planer surface having opposed a first side edge and a second side edge, a first side surface connected to the first side edge and a second side surface connected to the second side edge, both the first side surface and the second side surface extending outwardly from the planer surface and opposite to each other, each of the pair of opposed silencer hoods configured to be hingeably mounted to portions of the distal end of the lower elongated plenum, and in the operative position, the pair of opposed silencer hoods being positioned substantially upright such that the planer surface, the first side surface and the second side surface of each of the opposed silencer hoods pivotally extending to form the upper elongated plenum at the distal end of the lower elongated plenum; and

an extension assembly disposed on the lower elongated plenum that moves the upper noise attenuation system between the stowed position and the operative position.

2. The exhaust attenuation assembly of claim 1 , further comprising a first plenum configured to receive exhaust gas from the gas turbine, a first end of the first plenum configured to be connected to an exhaust outlet of the gas turbine and a second end of the first plenum connected to the inlet of the lower elongated plenum.

3. The exhaust attenuation assembly of claim 2 , wherein the first plenum is configured to be connected to the trailer to extend longitudinally substantially parallel to a bottom surface of the trailer.

4. The exhaust attenuation assembly of claim 1 , wherein the lower elongated plenum is configured to extend longitudinally away from a bottom surface of the trailer about an exhaust axis.

5. The exhaust attenuation assembly of claim 4 , wherein the upper noise attenuation system, in the operative position, extends longitudinally away from the distal end of the lower elongated plenum about the exhaust axis.

6. The exhaust attenuation assembly of claim 5 , wherein the exhaust axis is substantially perpendicular relative to the bottom surface of the trailer.

7. The exhaust gas attenuation assembly of claim 1 , wherein the pair of opposed silencer hoods comprises an upper silencer hood and a lower silencer hood, and respective opposing side surfaces of the upper silencer hood and the lower silencer hood are configured to cooperatively slide relative to each other when moving between the stowed position and the operative position.

8. The exhaust gas attenuation assembly of claim 7 , wherein the upper noise attenuation system further comprises:

an anchor point mounted on a back surface of the planar surface of each silencer hood proximate a bottom edge of the back surface;

a wire connected to each respective anchor point; and

a spooling system operatively connected to a respective wire for selective movement of the respective connected silencer hood between the stowed position and the operative position.

9. The exhaust gas attenuation assembly of claim 8 , wherein the exhaust attenuation system further comprises a retention brace system comprising:

a first pair of opposing retention braces comprising a first brace mounted to exterior portions of the distal end of the lower elongated plenum and a second brace mounted to opposed exterior portions of the distal end of the lower elongated plenum, each brace of the first pair of opposing retention braces comprising a bar extending between a first end mount and an opposing second end mount such that, when mounted, the bar is spaced from an exterior surface of the distal end of the lower elongated plenum and defines a slot sized and shaped for receipt of portions of respective side surfaces of the pair of silencer hoods; and

a second pair of opposing retention braces comprising a third brace spaced proximally from the first brace and mounted to exterior portions of the lower elongated plenum and a fourth brace spaced proximally from the first brace and mounted to opposed exterior portions of the lower elongated plenum, each brace of the second pair of opposing retention braces comprising a bar extending between a first end mount and an opposing second end mount such that, when mounted, the bar is spaced from an exterior surface of the lower elongated plenum and defines a slot sized and shaped for receipt of respective side surfaces of the pair of silencer hoods when the pair of silencer hoods is positioned in the stowed position.

10. An exhaust attenuation assembly to receive exhaust gas from a gas turbine attached to a trailer, the exhaust attenuation assembly comprising:

a lower elongated plenum having a proximal end and a distal end, the lower elongated plenum extending a first distance between the proximal end and the distal end, and having an inlet positioned adjacent the proximal end to receive exhaust gas from the gas turbine;

an upper noise attenuation system movably connected relative to the distal end of the lower elongated plenum, the upper noise attenuation system being selectively movable between a stowed position, in which an outlet end portion of the upper noise attenuation system is positioned proximate the distal end of the lower elongated plenum, and an operative position, in which the upper noise attenuation system defines an upper elongated plenum in fluid communication with the distal end of the lower elongated plenum and in which an outlet of the upper elongated plenum is spaced away from the distal end of the lower elongated plenum at a second distance that is greater than the first distance, the upper noise attenuation system also including a pair of opposed silencer hoods,

each of the pair of opposed silencer hoods including a planer surface having opposed a first side edge and a second side edge, a first side surface connected to the first side edge and a second side surface connected to the second side edge, both the first side surface and the second side surface extending outwardly from the planer surface and opposite to each other, each of the pair of opposed silencer hoods configured to be mounted to portions of the distal end of the lower elongated plenum, and in the operative position, the pair of opposed silencer hoods being positioned substantially upright such that the planer surface, the first side surface and the second side surface of each of the opposed silencer hoods pivotally extending to form the upper elongated plenum at the distal end of the lower elongated plenum; and

an extension assembly disposed on the lower elongated plenum that moves the upper noise attenuation system between the stowed position and the operative position.

11. The exhaust attenuation assembly of claim 10 , further comprising a first plenum configured to receive exhaust gas from the gas turbine, a first end of the first plenum configured to be connected to an exhaust outlet of the gas turbine and a second end of the first plenum connected to the inlet of the lower elongated plenum.

12. The exhaust attenuation assembly of claim 11 , wherein the first plenum is configured to be connected to the trailer to extend longitudinally substantially parallel to a bottom surface of the trailer.

13. The exhaust attenuation assembly of claim 10 , wherein the lower elongated plenum is configured to extend longitudinally away from a bottom surface of the trailer about an exhaust axis.

14. The exhaust attenuation assembly of claim 13 , wherein the upper noise attenuation system, in the operative position, extends longitudinally away from the distal end of the lower elongated plenum about the exhaust axis.

15. The exhaust attenuation assembly of claim 14 , wherein the exhaust axis is substantially perpendicular relative to the bottom surface of the trailer, and wherein the upper noise attenuation system also includes an elongated conduit configured for complementary receipt in a distal portion of the lower elongated plenum.

16. The exhaust gas attenuation assembly of claim 10 , wherein the pair of opposed silencer hoods comprises an upper silencer hood and a lower silencer hood, and respective opposing side surfaces of the upper silencer hood and the lower silencer hood are configured to cooperatively slide relative to each other when moving between the stowed position and the operative position.

17. The exhaust gas attenuation assembly of claim 16 , wherein the upper noise attenuation system further comprises:

an anchor point mounted on a back surface of the planar surface of each silencer hood proximate a bottom edge of the back surface;

a wire connected to each respective anchor point; and

a spooling system operatively connected to a respective wire for selective movement of the respective connected silencer hood between the stowed position and the operative position.

18. The exhaust gas attenuation assembly of claim 17 , wherein the exhaust attenuation system further comprises a retention brace system comprising:

a first pair of opposing retention braces comprising a first brace mounted to exterior portions of the distal end of the lower elongated plenum and a second brace mounted to opposed exterior portions of the distal end of the lower elongated plenum, each brace of the first pair of opposing retention braces comprising a bar extending between a first end mount and an opposing second end mount such that, when mounted, the bar is spaced from an exterior surface of the distal end of the lower elongated plenum and defines a slot sized and shaped for receipt of portions of respective side surfaces of the pair of silencer hoods; and

a second pair of opposing retention braces comprising a third brace spaced proximally from the first brace and mounted to exterior portions of the lower elongated plenum and a fourth brace spaced proximally from the first brace and mounted to opposed exterior portions of the lower elongated plenum, each brace of the second pair of opposing retention braces comprising a bar extending between a first end mount and an opposing second end mount such that, when mounted, the bar is spaced from an exterior surface of the lower elongated plenum and defines a slot sized and shaped for receipt of respective side surfaces of the pair of silencer hoods when the pair of silencer hoods is positioned in the stowed position.