How do you detect a compressor surge?

How do you detect a compressor surge?

Generally, the occurrence of surge is inferred from a rapid change in any measurement that is a direct function of compressor flow or head. As mentioned previously, compressor flow, discharge pressure, and inlet temperature are signals that can be used for surge detection.

What is gas turbine compressor surge?

A compressor stall is a local disruption of the airflow in the compressor of a gas turbine or turbocharger. A stall that results in the complete disruption of the airflow through the compressor is referred to as a compressor surge.

What is surge in compressor How do you detect and control it?

When a compressor is surging, the system only needs to detect this condition and keep opening the antisurge valve in steps until the compressor stops surging. It’s a discrete, open-loop response that is called Surge Detection and the speed requirements for that function is covered by API Standard 670, 5th edition.

What is Surge test in compressor?

A compressor undergoes surge testing to optimize the calibration of anti-surge control systems so that they fully protect a compressor from potentially damaging surge conditions while maximizing the compressor’s turndown (operating range).

How do you stop compressor surge?

6 Ways to to Avoid Centrifugal Compressor Surge

1. Larger Anti-surge Valve (ASV) Size with a Quick Opening Valve.
2. Suction and Discharge Pipe Re-Routing.
3. Re-Positioning Anti-surge Tap off- Point.
4. Slowing Compressor Speed during Coast down.
5. Discharge Side Gas Flaring.
6. Hot Gas Recycle Valve Installation.

How do you control a surge?

Methods for controlling hydraulic surges include utilizing a gas-loaded surge relief valve, spring-loaded pressure safety valves, pilot-operated valves, surge suppressors, and rupture disks.

What causes turbine surge?

Whenever the breakdown of gas flow takes place in the turbocharger, a reversal of scavenging air occurs through diffuser and impeller blades into the blower side which causes surging. The turbine side or exhaust gas side of the turbocharger does not play a direct role in the surging process.

How do you stop a compressor surging?

What causes surge in a compressor?

Surge occurs when there is no forward flow of gas through the compressor and a reversal of flow occurs. The gas that is being compressed gets pushed backward through the centrifugal compressor. When this surge (flow reversal) occurs, which can happen in milliseconds, the rotor is affected.

What happens when compressor surges?

Surging can cause the compressor to overheat to the point at which the maximum allowable temperature of the unit is exceeded. Also, surging can cause damage to the thrust bearing due to the rotor shifting back and forth from the active to the inactive side. This is defined as the surge cycle of the compressor.

What is surge relief?

A surge relief valve is a specially designed valve that protects piping and pipeline systems from pressure surge events caused by rapid valve closure, emergency shut-down or pump trip situations.

How do you know if your engine is surging?

Engine surging is different from a difficult start or a no-start problem. “Surging” does not refer to a knocking engine or one that idles rough or stalls. Engine surging is when an engine starts easily and accelerates smoothly, however after a few minutes at a steady speed, it either surges in speed or misfires.

What is the compression ratio of a GE gas turbine?

Today, GE’s most advanced F-class gas turbine, the 7FA.05 gas turbine (231 MW), has a 14-stage compressor with an overall pressure ratio of 18.4:1. This represents a reduction of one stage and an almost five-fold increase in compression ratio in seven decades of compressor design progress.

Is there a surge protection on a helicopter gas turbine engine?

There is a method of surge protection helicopter gas turbine engine, closest to the claimed implemented in the system of protection against surge (“operation Manual” of helicopter Mi-26, section 73.21.00, p.1-4, Fig.1).

How does the anti-surge system engine D-136 work?

In addition, anti-surge system engine D-136 is enabled by the first of the steady failure of the air pressure behind the compressor, while in most cases after the first failure of the air pressure behind the compressor motor itself leaves of the unstable mode and restores the original operating mode with minimal power loss in minimal time.

What percentage of a gas turbine is used to power the compressor?

About 50% to 70% of the output of the turbine component in a gas turbine is used to drive its compressor. Contrast that to a steam plant where only about 1% of the turbine output is used to power feedwater pumps to resupply incompressible water to the boiler.