Avoiding Standby Diesel Full Load testing by use of CbM

[MaintGuy]

There are many assumptions with my question so please correct me on any. We have a dozen of old and new standby power gererators in our infrastructure facilties. Monthly plant load tests are done for ~ 1/2 hr to 1 hr. Most of these diesel engines see from 10 - 25% load. Full load tests are recommended annually for generators not able to operate above 30% rating or lower than manf. recommended operating exhaust gas temps (NFPA 110/CAT/Cummins). These are all great for minimizing and removing wet-stacking and carbon build-up. If preventing wet-stack is the most important benefit for operating diesels at their high op parameters (Full-loading) is there a more direct method for observing and monitoring buildup in the combustion and exhaust chambers? Can a visual or boroscopic observation be performed with minimal intrusion and cost? NDT methods available?

 

[TheBlacksmith]

If you are operating at 10-25% load you most likely have accumulation and/or buildup and the run up to 70% to 80% load until the stack is clear is the best way to remove it; no special tools, no disassembly, etc.