in Glycol reboiler vessel,the level is always changing. what is the reason? reboiler temperature is 200degree celcius.we used the specific gravity of 1. there is relation with specific gravity and level?
I don't understand why this thread is in the Instrumentation section. I also do not understand why you are puzzled that the liquid level would change in a boiler assembly of any fluid. The design of the machine includes a method to measure the liquid level for a reason, it will change. If it was impossible to change the level then measuring it would be a waste of time. Additionally thermal expansion happens with all fluids. Heating a fluid to the boiling point will make it expand. Then comes the very definition of boiling a liquid. Boiling converts a liquid to a gas. So the liquid level will again change. Let's not forget that a leak could also happen.
It worries me that you seem to think that the fluid level of a liquid in a boiler should be constant.
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