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

nicole chen cloris.chen at gmail.com
Wed Oct 24 07:36:58 PDT 2007


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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