Working Group

#497 Chiller Plant Enhancements Working Group

Sean Stackhouse Mon 5 Jun

We would like to create a working group focusing on enhancing chiller plants. This WG will have a specific focus on improving loop tagging and system groupings.

Looking forward to working with everyone, and seeing all the creative solutions to these complicated problems.

-Sean Stackhouse

Jay Herron Fri 28 Jul

Hi, I just wanted to repeat a proposal I gave earlier this year that we decided should get rolled into the chiller plant working group. Please see the discussion here: http://project-haystack.org/forum/topic/486

I've quoted the main proposal below as well:


Hi,

Due to the many different formats of heatExchanger:

  • condenser water <-> chilled water
  • primary chilled water <-> secondary chilled water
  • primary hot water <-> secondary hot water
  • secondary hot water <-> tertiary hot water
  • and more...

I think it would be very helpful to have tags that generalize the heatExchanger operation among all these situations. I propose that two more tags are included, just for heat exchangers:

  • hotSide
  • coldSide

This would be the hot/cold side of the heat exchanger when the heat exchanger is in operation. Of course, the other tags should still be present. So for example, on temps in a primary hot water <-> secondary hot water heat exchanger, you may have the points:

  • primary hot water hotSide entering temp sensor
  • primary hot water hotSide leaving temp sensor
  • secondary hot water coldSide entering temp sensor
  • secondary hot water coldSide leaving temp sensor

On a condenser water <-> chilled water heat exchanger, you may have the points:

  • condenser water coldSide entering temp sensor
  • condenser water coldSide leaving temp sensor
  • chilled water hotSide entering temp sensor
  • chilled water hotSide leaving temp sensor

By using these tags, we no longer need to know the different types of water that the heat exchanger serves, greatly simplifying calculations like hotSide and coldSide dTs or heat exchanger approaches.

Let me know what you think! Thanks!

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