Com­pressors - Early Detec­tion of Damage and Inef­fi­cien­cies

Tech­nic­al phe­nom­ena in com­pressors

Today, gas tur­bines op­er­ate with a rated elec­tric­al out­put of up to 450 MW. This poses an enorm­ous chal­lenge to the ma­ter­i­al and all com­pon­ents of the tur­bine, in­clud­ing the com­pressor blades. It is pre­cisely here that the in­crease in ef­fi­ciency and per­form­ance is at the fore­front of cur­rent de­vel­op­ments. However, as the size and com­plex­ity of tur­bine com­pon­ents in­creases, so does the in­flu­ence of haz­ard­ous vi­bra­tion con­di­tions on the safety of the en­tire sys­tem.

These vi­bra­tion states are caused by cyc­lic loads, which in the worst case cor­res­pond to the vi­bra­tion modes of the sys­tem under con­sid­er­a­tion. Known as res­on­ance, this tech­nic­al phe­nomen­on can lead to very high vi­bra­tions.

Ma­ter­i­al Fa­tigue and Im­bal­ance

Poten­tial dam­age in Com­pressors

Over a long peri­od of time, the cyc­lic loads of the com­pressor pro­cess and the grid-in­duced vi­bra­tions favor ma­ter­i­al fa­tigue at key points of the tur­bine as well as at the com­pressor blades.

If, in ad­di­tion, the smal­lest im­bal­ances exist on the ro­tat­ing com­pressor com­pon­ents, the dif­fi­culties already men­tioned are in­tens­i­fied and ac­cel­er­ated. For­eign bod­ies, such as ice chunks, can cause ad­di­tion­al dam­age and thus un­bal­ance. However, since the re­duced gap di­men­sions due to ef­fi­ciency do not allow much space in the ro­ta­tion be­ha­vi­or of the com­pressor, severe con­sequences can occur dur­ing tur­bine op­er­a­tion. These con­sequences range from a re­duc­tion in ef­fi­ciency to blade loss and total tur­bine fail­ure.

Pro­act­ive Mon­it­or­ing Sys­tem for On-Time Pro­tec­tion

Our solu­tion for com­pressor vi­bra­tions

A mon­it­or­ing sys­tem that iden­ti­fies these haz­ard­ous vi­bra­tions in good time, ini­ti­ates pro­tect­ive meas­ures and can thus pre­vent costly dam­age: The IfTA Ar­gusOMDS, our all-in-one solu­tion in com­bin­a­tion with the ana­lys­is soft­ware IfTA TrendView­er.

The IfTA sys­tem of­fers spe­cial­ized al­gorithms (Cep­strum, etc.) that mon­it­or the con­di­tion of the com­pressor in real time and pass it on to the con­trol sys­tem. All pro­cesses run par­al­lel to the com­bus­tion mon­it­or­ing on one hard­ware. The con­tinu­ous long-term stor­age, in­clud­ing the high-res­ol­u­tion raw data, also en­ables the ana­lys­is of un­fore­seen or sporad­ic events.

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