REPAIRING HOT SECTION NOZZLES CAN BE COST-EFFECTIVE

摘要

An effective method for repairing hot section nozzle trailing edges is coming for large gas turbines. With recent natural gas price volatility, gas turbine plant owners are scrutinizing every aspect of operation expense to optimize performance, maintenance and life cycle costs. One area is the repair and refurbishment of gas turbine hot section components such as the combustion system, turbine buckets and nozzles. Working closely with plant owners, refurbishment companies routinely make cost/benefit decisions to either scrap or refurbish components in the turbine's first stage nozzle, especially nozzle trailing edges. Buying entire replacement nozzle segments for these cobaltickel-based castings can be prohibitively expensive and require long service outages. In most cases, the purchase price can be an order of magnitude higher than the repair cost.