[BLDG-SIM] how to simulate a four pipe system with heat pump chiller providing cooling in summer and heating in winter

["Mark Nieman" <MARKN@xxxxxxxxxxxxx>]

It sounds like you may not have specified a pump for your chilled water loop. Check the loop and see if you have a pump assigned to it. You'll need to be mindful of your pump energy to make sure you're not overshooting what your actual system configuration will use.

 

Mark Nieman, PE, CEM
Sr. Energy Engineer
McKinstry Essention
Direct: (206) 832-8152
Cell: (206) 510-4760
FAX: (206) 832-8552
http://www.mckinstry.com
"For The Life Of Your Building"

 

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From: BLDG-SIM@xxxxxxxx [mailto:BLDG-SIM@xxxxxxxx] On Behalf Of nicole chen
Sent: Wednesday, October 24, 2007 7:37 AM
To: BLDG-SIM@xxxxxxxx
Subject: [BLDG-SIM] how to simulate a four pipe system with heat pump chiller providing cooling in summer and heating in winter

Dear all

 

I am trying to simulate a four pipe system with heat pump chillers providing cooling in summer and heating in winter and purchased steam as supplemental heating source.I planed to build two loops for the project. One for chilled water , another for hot water. But heat pump chillers can only be attached to chilled water loop or two pipe loop , not hot water loop. So I built one chilled water loop for cooling and one two pipe loop for heating . But there is always a error message " the chilled water loop has zero flow rate". It seemed a two pipe loop can not be build together with other type of loop ,such as chilled water loop or hot water loop. I have no idea of it . I want to know how to simulate such a system. Thank you in advance.
--
Yours
Nicole Chen

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