How do you model multiple temperatures for various heating HW loops such
as radiant slab (120/constant temp) vs. HW loop (160/based on OA reset)
for any type system if they are all coming from the same boiler plant?
Do you provide a heat exchanger on the peripheral loop to account for
the different temperature?
Eric Hethcoat, P.E.
eQuest allows you to create secondary loops with different design temperatures. Right click on project, create a new circulation loop of type Hot Water, choose secondary subtype, select the primary loop and specify your design temperatures. It will use a 3-way valve to mix down the temperature you specify. There may be a couple steps I'm forgetting, but this is the general direction I head in.
Jeremy
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Jeremy McClanathan, P.E., BEMP, HFDP, LEED(r) AP BD+C