Modeling an air to air HP that uses exhaust air as exchanging fluid

asked 2019-02-20 09:12:46 -0500

FSilenzi gravatar image

Hi everyone, I would like to mdel (in openstudio) the air conditioning system that is described in the question. The model is a Clivet Zephir 3, which can produce heating and cooling air, using the exhaust air as heat source/sink. At the moment I am using a "Unitary - DX Heat Pump - Cycling - Elec reheat" from the openstudio Library. What is unclear to me is that is it possible in openstudio to model the real HP behaviour. It would be nice because this solution helps to save lots of energy (according to the producer) so I think that it would be mandatory to take it into account in my model, in order to validate it with real datas (which I have). So I am asking to you if modeling this kind of HP is possible and if my choice in openstudio is reasonable. Thanks to anybody that will help.


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I actually managed to model the DX cooling coil (OS:Coil:Cooling:DX:SingleSpeed) to work with the exhaust air, using the loop return node as "Condenser Air Inlet Node Name" input, editing the .osm file directly. Now I woul like to do the same with the DX heating coil (OS:Coil:Heating:DX:SingleSpeed). Using the idf editor to open the "in.idf" or the "pre-process.idf" files, I can see a field named "Evaporator Air Inlet Node Name", which I think it is the field I need to edit to model the same behaviour for the heating coil. If I edit those idfs, when I run the .osm the changes are reverted

FSilenzi gravatar imageFSilenzi ( 2019-03-08 06:33:32 -0500 )edit

but there is not "Evaporator Air Inlet Node Name" field in the .osm file to manually edit with a text editor. Can anybody help with this? I apologize for the double comment but I ran out of space. Thanks

FSilenzi gravatar imageFSilenzi ( 2019-03-08 06:35:03 -0500 )edit

I'm having the exact same issue at the moment

djd gravatar imagedjd ( 2019-03-10 06:55:14 -0500 )edit