I don't think it is allowed under legislation any more. The plant is just 60+ years old and those boilers were installed in the 50's/60's when this design was allowed. The new boiler we are installing will have a direct combustion path from outside. However, the legislation considers these old...
Question:
Is there a limit to how much negative pressure can be in a building? Is there an Ashrae standard for this? I can't seem to find anything on this.
Background:
This is boiler plant that is for district heating of a few building around the plant. The combustion air for the boilers is...
Background:
We designed a steam letdown station, which has since been installed and in operation. The system consists of a pressure reducing valve and a de-superheater right after the valve (all in one unit). Inlet conditions are 450 psig, 750 F steam in an 8" pipe to the conditioning valve and...
