I have inherited a chilled water system with a unique design that is having problems. The system has four 15 Ton chillers that are water cooled. Each chiller has its own pump; the original design is for 3 chillers and 3 pumps to be online at any one time. The unique aspect to me is that 3 of...
I am working on a system that has a 1-1/2" common header from 3 individual pumps. We didn't do the original install but the 9 air handlers that were originally selected didn't perform so we re-did the heat load calculations for the new units and the chilled water to nearly all of the units has...
I have a quick general questions. For a chilled water system that is closed loop (the supply goes out from the pump through the supply branches which feed different cooling coils and then all feed back to the return branch and back to the pump) when I am calculating the pressure drop to get the...
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I am designing a chilled water system that will use two 150 ton chillers and two pumps, this system will be a closed loop system. See the diagram for what the chillers and pump set up will look like. Only one pump and one chiller will be...
I am working on a project that has Direct Expansion HVAC units installed to cool a birthing barge. The condenser units are on the roof and the AHU's are in the spaces throughout. We have been asked to go back a decide where refrigerant monitors should be located in the spaces below. Is there...
Hi all, I am in the process of designing a chilled water system and have gotten to the point of running calculations to figure out the pump head I need. The system is a closed loop chilled water system that has a demand of 480 GPM. There are two chillers and two pumps, with one chiller and...
