The Turbine Talk: One-on-one with Arnold Group at AMC 2026

Arnold Group + Hanwha Power: Startup Performance, Shell Warming, and Why Insulation Matters More Than It Gets Credit For

Startup time is a cost. Every hour a combined-cycle plant spends getting up to operating temperature is an hour it isn't generating revenue, and in a grid environment shaped increasingly by renewable penetration and dispatch flexibility, that cost has become harder to ignore. Pierre Ansmann, Global Head of Marketing at Arnold Group, sits down with Brian Loucks, Hanwha Power's Manager of Airfoils, Upgrades, and Engine Integration, to talk about what it actually takes to improve startup performance across the full combined-cycle system.

Arnold Group, headquartered in Germany, has been building insulation systems and providing on-site machining services for gas turbines, steam turbines, and HRSGs for decades. Their work spans thermal insulation, noise and fire protection, and ventilation engineering alongside mobile machining services that cover everything from line boring to rotor work, all executed at the customer's site without requiring equipment removal.

The conversation covers where the energy market is heading and why that trajectory makes thermal management during shutdown more important, not less. The core of it is practical:

• Shell warming for gas turbines, steam turbines, and HRSGs: How preheating during shutdown intervals changes the starting conditions and reduces the time required to reach operating temperature safely.
• ROI and fuel reduction: The economics of a warming system over a plant's operating life, with emissions reduction as a parallel benefit.
• Insulation system design on the combustion turbine: Why the quality and design of the insulation system isn't just a maintenance consideration, it directly affects how well a warming system performs and how consistently startup conditions can be replicated.

For plants operating in cycling or peaking mode, or for anyone managing a combined-cycle asset in a market where dispatch flexibility is becoming a competitive factor, the link between insulation quality and startup performance is a practical one that this conversation makes concrete.