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Frame 9E
- Thread starter Akin
- Start date
@Akin,
Do you not have access to the Operations & Maintenance Manuals provided with the equipment where this equipment is usually described and documented?
The types of ignition equipment (high-voltage sources and igniters (“spark plugs”) are usually a function of the type of combustion system used on the machine. Machines with Dry Low NOx combustion systems usually use a high-tech ignition power supply and stationary igniters (“spark plugs”). Machines with conventional combustors usually use low-tech transformers with retractable “spark plugs”.
NOTE: The use of the term “spark plug” is not a very good description for the function it performs. Many people mistakenly assume that if a GE-design heavy duty gas turbine has “spark plugs” that it means the devices are energized at all times while the machine is running—and that’s not true. The igniters (a better term for the function they perform) are only energized during STARTing and, on Frame 9E machines with Dry Low NOx combustors during combustion mode transfers from Premix to either Lean-Lean or Extended Lean-Lean. Once flame is established in the combustors during STARTing for a period of time the igniters (“spark plugs”) are de-energized because the flame is self-sustaining as long as the fuel and air flows are sufficient and no ignition means is required.
The style of flame detectors used on GE-design heavy duty gas turbines has also changed over the decades, most recently also as a function of the type of combustion system on the machines. For many decades Geiger-Mueller flame detectors were used and were very reliable. With the introduction of Dry Low NOx combustion systems silicon-carbide flame detectors came into use. The Geiger-Meuller flame detectors required very high voltage (approximately 335 VDC) to operate, while the silicon-carbide flame detectors (often called flame sensors) use nominal 24- or 28 VDC power sources for operation.
If you are having issues with them please describe them and we can probably offer some things to try. You just need to tell us more about the 9E machine(s) you are working on: What turbine control system is used? What kind of combustion system is used? What kinds of fuel are burned during STARTing and normal running operation? What has been done to try to troubleshoot and resolve the issue(s)? Things we can’t know unless you tell us because we aren’t there beside you to know what you know and see what you see. Help us to help you.
Again, the best source for information like this is the Operations & Maintenance Manuals provided with the equipment. The specific equipment used on the machine is usually described in the manuals along with the manufacturer’s documentation for the equipment.
Sorry; but I don’t have anything to share with you other than my personal experience. If you tell us the information above someone reading this post may be able to offer some detailed information.
Do you not have access to the Operations & Maintenance Manuals provided with the equipment where this equipment is usually described and documented?
The types of ignition equipment (high-voltage sources and igniters (“spark plugs”) are usually a function of the type of combustion system used on the machine. Machines with Dry Low NOx combustion systems usually use a high-tech ignition power supply and stationary igniters (“spark plugs”). Machines with conventional combustors usually use low-tech transformers with retractable “spark plugs”.
NOTE: The use of the term “spark plug” is not a very good description for the function it performs. Many people mistakenly assume that if a GE-design heavy duty gas turbine has “spark plugs” that it means the devices are energized at all times while the machine is running—and that’s not true. The igniters (a better term for the function they perform) are only energized during STARTing and, on Frame 9E machines with Dry Low NOx combustors during combustion mode transfers from Premix to either Lean-Lean or Extended Lean-Lean. Once flame is established in the combustors during STARTing for a period of time the igniters (“spark plugs”) are de-energized because the flame is self-sustaining as long as the fuel and air flows are sufficient and no ignition means is required.
The style of flame detectors used on GE-design heavy duty gas turbines has also changed over the decades, most recently also as a function of the type of combustion system on the machines. For many decades Geiger-Mueller flame detectors were used and were very reliable. With the introduction of Dry Low NOx combustion systems silicon-carbide flame detectors came into use. The Geiger-Meuller flame detectors required very high voltage (approximately 335 VDC) to operate, while the silicon-carbide flame detectors (often called flame sensors) use nominal 24- or 28 VDC power sources for operation.
If you are having issues with them please describe them and we can probably offer some things to try. You just need to tell us more about the 9E machine(s) you are working on: What turbine control system is used? What kind of combustion system is used? What kinds of fuel are burned during STARTing and normal running operation? What has been done to try to troubleshoot and resolve the issue(s)? Things we can’t know unless you tell us because we aren’t there beside you to know what you know and see what you see. Help us to help you.
Again, the best source for information like this is the Operations & Maintenance Manuals provided with the equipment. The specific equipment used on the machine is usually described in the manuals along with the manufacturer’s documentation for the equipment.
Sorry; but I don’t have anything to share with you other than my personal experience. If you tell us the information above someone reading this post may be able to offer some detailed information.
If they share the same type of combustion system and the two turbine control systems have the proper inputs and outputs, yes.
ALL machines—while very similar—share many of the same field devices. Often the turbine control systems don’t always have the proper numbers or types of inputs and/or outputs to switch devices between them.
Contrary to extremely popular belief all Frame 6Bs are not like every other Frame 6B. And the same is true of Frame 9Es. Essentially, they are very similar versions of the same design, just at different scales and do share many field devices. But the auxiliaries (pumps; fans; gear boxes; inlet filter assemblies; generators; cooling water systems; etc.) can be very different if functionally identical.
ALL machines—while very similar—share many of the same field devices. Often the turbine control systems don’t always have the proper numbers or types of inputs and/or outputs to switch devices between them.
Contrary to extremely popular belief all Frame 6Bs are not like every other Frame 6B. And the same is true of Frame 9Es. Essentially, they are very similar versions of the same design, just at different scales and do share many field devices. But the auxiliaries (pumps; fans; gear boxes; inlet filter assemblies; generators; cooling water systems; etc.) can be very different if functionally identical.
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