Technology

Output/Capacity Upgrades

Firing Temp Upgrades

APG has found there is often a significant amount of output that can be gained on a unit by simply increasing the firing temp. These types of increases can range from simple controls modifications to coating, cooling, and material changes. Depending on the operations of your unit this can be a very cost effective way to gain additional Megawatts

Sealing Upgrades

Reductions in the loss of air on a unit can have a positive impact not only on the efficiency but also output. APG has many options for sealing modifications including seal clearance reductions, brush seals, honeycomb Seals, cloth Side Seals, and abradable coatings

Power Augmentation

APG can support power augmentation modifications including but not limited to evaporative cooling, inlet chillers, compressor fogging, and water/steam injection systems.

Reliability/Availability Upgrades

Coatings (HDTBC costing)

A comprehensive review of the coating on your unit may reveal opportunities to gain unit reliability. These gains can be in the increased repairability of the parts, extended parts life, and increased outage intervals.

There are many coating for your rotors that can extend the life of the parts. These include corrosion coating and anti-rock coatings
Combustion systems coating can be applied to reduce wear due to high temp., reduce oxidation and reduce the impact of interface wear.
Turbine section coatings typically allow for the reduction of surface metal temperatures and the impact of oxidation on the parts.

Compressor

7FA – The 7FA compressor has many know issue. APG is well positioned to support all applicable OEM technical recommendations including the standard package upgrades up to package 5. We also have a robust shim elimination program. We can supply and install our own shrouded S17 that is an upgrade to the OEM supplied solution.
7EA – APG has a comprehensive industry leading solution to the 7EA compressor issues including clashing, stator shim elimination, case slippage, stator vane rock, blade tip rock, spacer migration, R17 replacement, and a complete line of compressor rotor shop support capabilities.
Siemens/Westinghouse – APG has extensive experience on modification and repairs of the Siemens/Westinghouse frame compressor.

Instrumentation Upgrades

There are many opportunities on older frame units to increase reliability with instrumentation upgrades to a unit. This can include bearing metal thermocouple, vibration systems, thermocouple upgrades to allow for replacement without disassembly, flux probs and bus couplers, and changes from switches and gauges to transmitters to name a few.

Parts modifications

As a part is sent through the repair cycle there are a number of modifications that APG can offer the will increase the reliability of the unit.

Increase Efficiencies

Improving the heat rate of your gas turbine is an easy way to save money on your plant’s largest O&M Expense, Fuel. Whether it is cloths seals, brush seals, or honeycomb, APG can help you in determining the appropriate sealing technologies to improve your unit’s heat rate.

Shaft sealing

Stationary parts sealing

Decrease in engine clearances

Part Life Extensions

Asset owners looking to reduce capital costs and maintain their gas turbines can look to APG for our expertise in getting more life out of their assets. We have a robust program where we can evaluate the current condition of your assets and determine if we can improve the life through additional technology or operational improvement. Some examples of this are:

Rotor Life Extension

Component Improvement

Coating
Inspection
Part Life Evaluation

Asset Life Extension

Operational Flexibility

As Renewable Energy sources are spreading rapidly across the globe, are you prepared to respond to the shift in dispatch quickly? APG and our partners stand ready to help you improve the operational flexibility of your gas turbines through some of our proven control system modifications and upgrades. Some examples are:

Fast Start

Fuel Flexibility/System Conversions

Control Modifications

Cold day performance
Tuning (TTS Auto tune)
Low Load turn down