Monthly Archives for January 2010

Gas compressor problems

Referring back to Figure 10—1, remember that we have compared the actual gas compressor speed to the speed indicated by the curve that passes through point “A”. We calculated point “A” from the natural gas flow, and the observed suction … Continue reading

30. January 2010 by Jack
Categories: Gas Turbine | Tags: | Leave a comment

Gas turbine air compressor problems

One way of looking at a gas turbine centrifugal compressor is that the combustion air compressor must pump sufficient air to support combustion across the turbine blades as needed to spin the gas compressor at its required speed. Any factors … Continue reading

30. January 2010 by Jack
Categories: Gas Turbine | Tags: , | Leave a comment

Gas turbine exhaust temperature unit troubleshooting

Gas turbines are limited, as are all rotating assemblies, by either speed or power. For an electric motor, the power limit is manifested by maximum amperage, (more precisely, the maximum permissible winding temperature). The situation with gas turbines is similar. … Continue reading

30. January 2010 by Jack
Categories: Gas Turbine | Tags: , , | Leave a comment

Troubleshooting gas turbine drivers

A centrifugal compressor driven by a gas turbine at a pipeline booster station is moving 80 MMSCFD of natural gas. It used to move 95 MMSCFD. What’s wrong? As the troubleshooter, consider whether the problem is with the driver or … Continue reading

30. January 2010 by Jack
Categories: Gas Turbine | Tags: , | Leave a comment

Gas Turbine Driven Centrifugal Compressors

While the majority of natural gas field and transmission compressors are reciprocating machines, a sizable minority are centrifugal compressors driven by gas turbines. Only on rare occasions can electric, steam or deisel oil drives compete with natural gas as compressor … Continue reading

27. January 2010 by Jack
Categories: Gas Turbine | Tags: , | Leave a comment

Compression work vs. temperature rise

A handy rule of thumb to retain for compression troubleshooting jobs is that the theoretical temperature increase of gas due to compression is linearly proportional to compression horsepower. An extremely useful application of this rule of thumb is the following … Continue reading

26. January 2010 by Jack
Categories: RECIPROCATING COMPRESSORS | Tags: , | Leave a comment