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? - Unmet Hours

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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 7 years ago

Anurag_Biswas
21 ●1

updated 7 years ago

flag of United States of America

4446 ●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 7 years ago

flag of United States of America

8187 ●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

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 ( 7 years ago )

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Last updated: Dec 16 '17

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