Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
I have not done it in series but in parallel. But I think it is possible. You have to make sure that you have a bypass in both supply side and demand side of the chilled water plant loop. Do not use the common pipe in the plantloop object. Place setpoint managers for both chillers. And the most difficult thing for me, which I have been looking how to set it up, this kind of setup requires to maintain a minimum flow through the loop. You can still model it with 0 minimum flow at the pump, but is not how it works in reality. If you set the primary pump with a non-zero minimum flow, you have to figure out a plantloop schedule for the chilled water loop to turn on the chiller and pumps when necessary. This is the way I would do it...VPF Air Cooled Series.JPG
| | 2 | No.2 Revision |
I have not done it in series but in parallel. But I think it is possible. You have to make sure that you have a bypass in both supply side and demand side of the chilled water plant loop. Do not use the common pipe in the plantloop object. Place setpoint managers for both chillers. Setup chillers operation mode as "leaving set point modulated". And the most difficult thing for me, which I have been looking how to set it up, this kind of setup requires to maintain a minimum flow through the loop. You can still model it with 0 minimum flow at the pump, but is not how it works in reality. If you set the primary pump with a non-zero minimum flow, you have to figure out a plantloop schedule for the chilled water loop to turn on the chiller and pumps when necessary. This is the way I would do it...VPF Air Cooled Series.JPG
