Projects

CLIENT

Hitachi, Ltd.
Power & Industrial Systems

PROJECT DESCRIPTION

INNOVA was selected by Hitachi, Ltd. to design and supply six (6) gas turbine enclosures, for the 382 MW gas-fired, Queen Elizabeth Power Station in Saskatoon, Saskatchewan.

SCOPE OF WORK

INNOVA was to design and supply;

  • Support structural steel
  • Six (6) acoustic gas turbine (GT) enclosures
  • Fire suppression systems
  • Enclosure lighting
  • Acoustic ventilation intake and exhaust system
  • Acoustic GT combustion intake system
  • Air intake filter house
  • Silencer
  • Elbows and ducting
  • Internal and external GT enclosure grating
  • Platforms and access ladders
  • On-site technical assistance during installation 

ACOUSTICAL REQUIREMENTS

85 dBA at 3 ft. (1 m)

NOISE SOURCES

Six (6) Hitachi H-25 gas turbines each rated at 25 MW

SILENCING SOLUTIONS

INNOVA provided panelized acoustic enclosures for the gas turbine and acoustically treated the intake and exhaust silencers of the ventilation system that included acoustic shrouds for the exhaust fans. The GT combustion air intake system was also acoustically treated.

UNIQUE PROJECT HURDLES

The Hitachi generators were equipped with original equipment manufacturer (OEM) enclosures and required joining to the INNOVA supplied enclosures.

Typically, noise targets are measured at a height of 4 ft. (1.3 m), and a distance of 3 ft. (1 m) from the surface of a noise source. This project required the more stringent condition of achieving 85 dBA at any height at 3 ft. (1 m) from the attenuated noise sources.

To meet the tight time-frame of the project, INNOVA shipped the air intake filter houses assembled and chose panelized gas turbine enclosures to further reduce on-site assembly time.