Power Plant Engineering Backed by More than 6,000 MW of Design Experience

Across multiple power plant engineering projects, the real challenges usually appear during execution, when drawings, layouts, and interfaces come together on site. With over 6,000 MW of experience across gas, combined-cycle, liquid fuel, and modular power plants, PMech's multi-discipline team delivers power plant engineering services that support smooth execution across different plant sizes and configurations.

Engineering Experience Across Power Generation Technologies

PMech's power plant detailed engineering scope of work covers multiple power generation technologies and configurations:

Combined-Cycle Power Plant Engineering

Combined-cycle power plant engineering demands close coordination between multiple vendor packages and balance-of-plant systems. These plants maximise fuel efficiency by recovering gas turbine exhaust heat through a Heat Recovery Steam Generator (HRSG) to drive a steam turbine. Major packages include:

• Gas Turbine Generator (GTG)
• Heat Recovery Steam Generator (HRSG)
• Steam Turbine Generator (STG)
• Condenser and Cooling System
• Feed water and Condensate Systems
• Electrical and Control Systems

PMech focus:

Plant layout optimisation, and interface management between gas turbine, HRSG engineering design, and steam turbine packages to ensure reliable and efficient operation.

Gas-Based Power Plant Engineering

Gas-based power plants are widely adopted for their operational flexibility, fast start-up, and lower emissions. When integrated with LNG infrastructure, gas turbine power plant engineering attention shifts to fuel gas conditioning, pressure and temperature control, and safe interface management. Packages include:

• Gas Turbine or Gas Engine Generator Sets
• Fuel Gas Receiving and Conditioning System
• LNG Regasification Interface
• Air Intake and Exhaust Systems
• Starting and Auxiliary Systems
• Electrical and Control Systems

PMech focus:

Safe and reliable fuel gas integration, coordination between LNG facilities and generation equipment, and robust auxiliary system alignment.

Liquid Fuel Power Plant Engineering

Liquid fuel power plants remain critical where gas supply is limited or as dependable backup generation. These facilities require specialised engineering for fuel handling, heating, storage, and safety. Major packages include:

• Diesel or HFO Engine Generator Sets
• Fuel Storage Tanks and Transfer Systems
• Fuel Heating and Conditioning Units
• Filtration and Fuel Treatment Systems
• Auxiliary and Utility Systems — cooling water, lube oil, instrument air, exhaust gas, stacks/chimneys up to 100m height
• Electrical and Control Systems

PMech focus:

Fuel storage and handling design, lube oil systems, safety considerations, and integration of critical auxiliary systems required for stable plant operation.

Modular and Phased Power Plant Design

Modular power plant design is increasingly adopted to reduce construction duration, improve quality control, and allow staged capacity addition. Engineering must balance transportability, constructability, and long-term system integrity. Key packages:

• Preassembled Power Generation Modules
• Skid-Mounted Auxiliary Systems
• Modular Electrical Rooms (E-Houses)
• Containerised Control Rooms
• Modular Utility Packages

PMech focus:

Modularisation strategies including plant layout optimisation, phased execution planning, and interface alignment to minimise site installation effort and construction risk.

Balance-of-Plant (BOP) and Utility Systems

Balance of plant engineering forms the operational backbone of any power facility, supporting the main generation equipment throughout its lifecycle. Major systems:

• Cooling Water and Cooling Tower Systems
• Water Treatment and Demineralisation Plants
• Compressed Air and Instrument Air Systems
• Fire Protection and Safety Systems
• Electrical Auxiliaries and Emergency Power Systems

PMech focus:

Seamless integration of BOP and utility systems with main equipment to ensure safe, reliable, and continuous plant operation.

Project Spotlight: 200 MW Natural Gas Based Combined Cycle Power Plant

This project involved power plant detailed engineering services for a 200 MW natural gas-based combined cycle power plant. The engineering scope focused on developing fabrication ready designs to support smooth execution.

Engineering Scope of Work

Based on OEM-supplied basic package, PMech delivered a comprehensive power plant engineering scope of work covering piping and layout engineering for both engine packages and pipe modules:

• Piping layout and 3D modelling for engine areas and pipe modules
• Interconnecting piping between gas engines and modular pipe systems
• Front-end and detailed piping support engineering
• Fabrication isometrics and bills of materials

P&ID finalisation for all major systems:

• Fuel oil system
• Lube oil system
• Cooling water system
• Instrument air and starting air systems
• Exhaust gas and charge air systems

Engineering Highlights

• Modular-friendly piping design to reduce site installation effort
• Fabrication-focused deliverables to minimise rework during construction
• Optimised routing, supports, and system integration
• Full stress analysis with detailed report

The 6,000 MW Engineering Roadmap: From Concept to Execution

PMech's power plant multidisciplinary engineering process is built on lessons learned across 6,000+ MW of project delivery. The engineering lifecycle is broken down into three critical stages:

Stage I — The Design Foundation

• System Validation: – Checking process and mass balance to confirm performance targets before detailed design begins
• Specifications: – Drafting clear technical bid documents to simplify procurement and avoid late changes

Stage II — Integration and Coordination

• Multidisciplinary Alignment: – Synchronising Process, Mechanical, Civil & Structural, Electrical, Instrumentation, and Piping systems to prevent on-site clashes
• Interface Control: – Managing the critical links between turbine packages and the rest of the plant — where most project delays originate
• 3D Modelling: –Building a coordinated plant model to finalise layout, verify clash-free routing, and support construction planning

Stage III — Ready for the Field

• Design Reviews: – Continuous checks for constructability and maintainability — not just code compliance
• Final Deliverables: – Material take-offs, fabrication drawings, and technical documents that drive the construction phase without ambiguity

Discipline-Wise Engineering and Design Scope

For the power generation technologies above, PMech executes a complete power plant multidisciplinary engineering and design scope, including:

• Process and Mechanical Engineering
• Piping and Layout Engineering
• Electrical Engineering
• Instrumentation and Control Engineering
• Civil and Structural Engineering
• Interdisciplinary Coordination and EPC Support

Get in Touch

Partner with us for your next power plant engineering project — from concept to execution, eliminating complexity and ensuring seamless coordination across every discipline and phase.

To know more or discuss your project requirements, visit us at www.pmecheng.com or reach us at info@pmecheng.com