Professional EPC Services for Gas Turbine Combined Cycle & Waste Heat Recovery Power Plants

ZHM  is a professional turnkey EPC (Engineering, Procurement, Construction) contractor specializing in gas turbine combined cycle power plants (GTCC) and waste heat recovery (WHR) power generation systems. We have successfully completed the full design, manufacturing, installation, and commissioning of multiple overseas GTCC and WHR projects, providing reliable, efficient, and standardized energy solutions for industrial and mining clients.

Our core business covers the full lifecycle of power plant delivery: conceptual design, detailed engineering, equipment procurement, site construction, mechanical completion, commissioning, and performance test. We implement strict quality control and international technical standards to ensure stable operation, high efficiency, and long service life for each plant.

Core Technical Features & Equipment Scope

Our completed projects adopt mature gas turbine waste heat recovery combined cycle technology, which efficiently recovers exhaust heat from gas turbines to generate steam and drive steam turbine generator sets, significantly improving overall energy utilization without extra fuel consumption.

Key technical configurations include:

▷Horizontal type HRSG (Heat Recovery Steam Generator): Unfired, dual-pressure / single-pressure, natural circulation, with integrated deaeration; equipped with spiral finned tubes for high heat recovery efficiency (approx. 75%) and modular structure for easy installation and maintenance.

▷Steam turbine generator: Medium-temperature medium-pressure condensing / make-up steam condensing type, 22MW class, 3000rpm, axial exhaust design, equipped with DEH digital electro-hydraulic control system for stable operation in 40%–100% load range.
▷Air-cooled generator: 22MW, 11kV output voltage, static excitation, with comprehensive temperature monitoring and interlock protection.
▷Circulating cooling water system: Closed-loop circulation with counterflow fiberglass cooling towers, variable-frequency pumps, and water treatment dosing devices; high circulation utilization rate (~98.2%) and low makeup water consumption.
▷Chemical water treatment system: Two-stage RO (reverse osmosis) process to meet GB/T12145 boiler feedwater standards; equipped with deaerator and dosing system for anti-corrosion and scale inhibition.
▷Electrical system: 11kV medium voltage switchgear, 0.415kV low voltage distribution, 220VDC battery system, fault current limiter, and emergency lighting; compliant with grid connection requirements.
▷DCS process automation: Distributed control system for real-time data acquisition, monitoring, alarm, and automatic regulation; including boiler water level, condenser hotwell, and deaerator level control loops.

Project Implementation & Advantages

All our delivered projects are fully integrated and customized based on site conditions, gas turbine parameters, and client demands. The bypass damper system ensures that WHR unit outages do not affect the operation of upstream gas turbines, enhancing security and flexibility.

Plant layout is optimized for compactness, including turbine generator building, HRSG modules, circulating water pump house, cooling tower, and chemical water treatment workshop. Steel structure buildings, organized drainage, and seismic design (Grade 7) ensure structural safety and durability under tropical climate conditions.

Technical & Economic Performance

Completed plants achieve the following reliable indicators:

▷Installed capacity: 1×22MW / 2×22MW

▷Design generation power: up to 18,280kW (single unit)
▷Auxiliary power consumption rate: approx. 7%
▷Relative operation rate: up to 98%
▷Flue gas discharge temperature: approx. 105°C, fully utilizing waste heat

Our Commitment

ZHM Metal Engineering remains focused on technical reliability, operational stability, and economic efficiency. We provide professional EPC services for gas turbine combined cycle and waste heat recovery power plants, supporting global clients in energy conservation, emission reduction, and sustainable development.

1 Drone View Chirano CCGT WHR Power Plant

2 Chemical Water Tank Plant

3 HRSG Boiler Lifting

4 HRSG Drum Economizer Installation

5 Water Cooler System Pumps

6 Pipe Rack Cable Tray To STG Building

7 STG Shaft Bearing Installation

8 HRSG Boiler Lifting Hoisting 650ton Crawler Crane

9 HRSG Boiler Piping Instrument Installation

10 Waste Heat Recovery Boiler High Temp Drum Installation

11 Steam Turbine Generator Piping Instrument Installation

12 Overhead Bridge Pipe Rack Cable Tray Installation

13 Steam Turbine Generator System Installation

14 Heat Recovery Boiler Chimney Stack Platform Installation

15 Heat Recovery Boiler Platform Pipe Support Installation

16 STG Building Steel Structure Installation

17 Cable Tray Installation

18 Boiler Mechnical Parts Lifting Installation

19 Steam Turbine Generator Shaft Installation

20 Steam Turbine Blade Generator Installation

21 Prefabricated Electrical Substation Control Rooms Installation

22 Prefabricated Electrical Substation Containers 3 Levels

23 Elevated Boiler Flue Gas Duct Tee Diverter

24 Boilers STG Building at Glance

25 Electrical Cable Trays Installation

26 Boiler HRSG System Construction Ongoing

27 Conbined Cycle Power Plant Layout

28 HRSG Boiler Top Protection Canopy Roof Sheds

29 STG System Erection

30 Boiler System Piping Instrument Installation

31 Drone View Layout Wassa Site

32 Chirano Plant Gas Turbine Exhaust Duct Heat Recovery Facilities

32 Edikan Power Plant Boiler Installation

33 Boiler Deaerator System Installation

34 STG Building Overcrossing Bridge Pipe Rack Cable Tray Installation

34 STG Building Overhead Crane 32ton Installation

35 DCS Substation Control Rooms Prefabricated Multiple Floors

36 Multiple Floor Elevated Pipe Support Rack Structures

37 20m High Boiler Canopy Sheds Roof Cladding Panels Installation

Why ZHM Huawu EPC for Gas Turbine Combined Cycle & Waste Heat Recovery Power Plants ?

Reliable and Customized Designs	Cutting Edge Designing Process	Free Online Price System	Easy Bolt-by-number Assembly
Over Two Decades of Experience	Value For Money	Unmatched in Quality and Craftmanship	Excellent Customer Service

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HOW CAN WE HELP YOU?

ZHM’s world-class team — together with our raw material suppliers and subcontractors — works to solve your most challenging design, engineering, farbrication or construction issues.

Contact ZHM by telephone at +86 135-8815-1981 (wechat and whatsapp) or send us your questions via email to info@zhmsteelworks.com