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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 and discharge pressure. We said that if the measured gas compressor speed exceeded the speed [...]
30Jan2010 | admin | 0 comments | ContinuedGas 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 which reduce the flow delivered by the combustion air compressor will reduce horsepower available to [...]
30Jan2010 | admin | 0 comments | ContinuedGas 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. The ultimate amount of power (i.e. work, horsepower), that can be developed by the turbine [...]
30Jan2010 | admin | 0 comments | ContinuedTroubleshooting 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 the compressor. Actually, there are three primary components involved:
• The combustion air compressor.
• The turbine [...]
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 fuel in pipeline service.
A gas turbine works on the same principle as a jet engine. [...]
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 approximation:
It is not too much to say that this relationship is the most important concept [...]
26Jan2010 | admin | 0 comments | ContinuedCoastal Caribbean Oils & Minerals, Ltd. – Financial Analysis Review—-Aarkstore Enterprise
Summary
Coastal Caribbean Oils & Minerals, Ltd. (Coastal Caribbean) is an independent oil and gas exploration company. It is engaged in the exploration and production of oil and natural gas reserves through its subsidiary, Coastal Petroleum Company (CPC). Its principal assets are its non-producing oil and gas leases in the States of Montana and North Dakota [...]