CHW connection into Existing System
CHW connection into Existing System
(OP)
In a building I have a chilled water header 150dia. Pipe that has branch take off to each floor in the building for supplementary cooling. The branch take offs on each floor connect to fan coil units for meeting rooms etc.…. More floor connections have nothing connect to them as yet; they are just valved and capped off for future use. The fan coil units have 3 port valves on each and the pump is on a VFD and maintains constant pressure (so I have been told anyway). Originally when the building was new the system was balanced and worked fine.
The Question is: Every time I connect a new floor to the system for the first time do I technically have to re balance the entire building (floor take offs at least). I think I do. Colleagues of mine with say no, that the VFD maintains constant pressure…. end of story. Any comments?
The Question is: Every time I connect a new floor to the system for the first time do I technically have to re balance the entire building (floor take offs at least). I think I do. Colleagues of mine with say no, that the VFD maintains constant pressure…. end of story. Any comments?





RE: CHW connection into Existing System
Most of the variable speed chilled water systems use differential pressure across supply and return headers to control the pump speed for optimum use of energy and to take the full benefit of variable speed pumping system.
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RE: CHW connection into Existing System
RE: CHW connection into Existing System