Why High Temps when loading centrifugal after purge.
Why High Temps when loading centrifugal after purge.
(OP)
Why is the compressor experiencing high temperatures in the range of 180F (RTD at discharge 10' comp. flange) when we simply gas-load the centrifugal compressor after a purge.
The impellers are not turning, we are just filling in the compressor with a loading valve before opening discharge for compression, at this point we experience gas temp alarms. However once the unit compressor starts turning and discharge valve opens and we are moving the gas, the temperature drops.
What is causing this spike in temperature, and is there a way to mitigate this high temps by controlling compressor gas velocities or any other component or variable.
Any help and direction will help.
Application: Gas Transmission compression station
Medium: transmission gas quality gas
Compressor Type: Rolls Royce RFA-24
The impellers are not turning, we are just filling in the compressor with a loading valve before opening discharge for compression, at this point we experience gas temp alarms. However once the unit compressor starts turning and discharge valve opens and we are moving the gas, the temperature drops.
What is causing this spike in temperature, and is there a way to mitigate this high temps by controlling compressor gas velocities or any other component or variable.
Any help and direction will help.
Application: Gas Transmission compression station
Medium: transmission gas quality gas
Compressor Type: Rolls Royce RFA-24





RE: Why High Temps when loading centrifugal after purge.
The piping which is used to transfer the gas into the compressor could be heat-traced. The piping is hot because of the steam or electric tracing. When the gas passes through the hot piping, it picks up heat and reaches the machine hotter than it was when it left the source.
The other option would be that your temperature measurement is inaccurate.
Johnny Pellin
RE: Why High Temps when loading centrifugal after purge.
What is end pressure?
Inlet temperature of incoming gas?
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Why High Temps when loading centrifugal after purge.
If Pressure increases the temperature has to increase too to keep the low. This is why when a gas is compressed the temperature always increases.
RE: Why High Temps when loading centrifugal after purge.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Why High Temps when loading centrifugal after purge.
Johnny Pellin
RE: Why High Temps when loading centrifugal after purge.
RE: Why High Temps when loading centrifugal after purge.
RE: Why High Temps when loading centrifugal after purge.