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The return pipe of AHU is the supply pipe for a radiant system in another floor. Is there a way to model it in OpenStudio?

asked 2017-12-13 05:35:55 -0500

Anurag_Biswas
21 ●1

updated 2017-12-15 10:23:50 -0500

__AmirRoth__

4436 ●5 ●17 http://bleedinggreenna...

Hi, I am new to energy simulation. I am designing a five story Hotel HVAC system in openstudio. The Ground Floor and First Floor have a number of FCUs and AHUs which I have modelled in Parallel in the Chilled water loop. Now, the Return pipe from this system is connected back to the Radiant system for rest of the floors through a pump. I guess having the radiant system in parallel to the FCUs and AHUs would not give me appropriate results. Is there a way to model it in Openstudio ? Or I need to take it too Energy Plus? Thanks

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answered 2017-12-16 17:33:59 -0500

aparker

8107 ●4 ●18 http://www.openstudio.net/

Disclaimer: I think that getting the controls for this to work will be tricky, and I haven't modeled this configuration myself, but here's where I would start. You might need a setpoint manager on the outlet side of the Heat Exchanger on the Radiant Loop depending on the control options you choose.

Chilled Water Loop with Heat Exchanger on return side of coils

Chilled Water Loop with Heat Exchanger

Radiant Loop fed by Heat Exchanger

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Thanks a lot. This solves the problem. But I fail to understand why a setpoint manager is needed after HX. Could you please elaborate?

Anurag_Biswas ( 2017-12-20 08:03:09 -0500 )edit

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Asked: 2017-12-13 05:35:55 -0500

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Last updated: Dec 16 '17

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The return pipe of AHU is the supply pipe for a radiant system in another floor. Is there a way to model it in OpenStudio? edit