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Heat pump water heater on exhaust

asked 2016-05-04 07:31:26 -0500

JB Heritier's avatar


I'd like to model a system based on a heat pump system, using extracted air instead of outside air. The point is to recover the few degrees that are still rejected to the outside, even after going through the ERV.

Then, using a Heat pump water heater, I'd like to set my inlet air to the node after the ERV. Is there any way this is possible in openstudio, with or without a measure, or directly in the idf?

It looks like it could work using the "inlet air mixer fraction schedule" and putting (1-efficiency of heat recovery system), but then it isn't true when by-passing the ERV...

Thanks, JB

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answered 2018-05-23 12:08:51 -0500

Viper's avatar

Aside from using EMS, you can add a branch of air to air heat exchanger (heat recovery coil) after the heat recovery ventilation and before exhaust.

Otherwise, I would recommend to use EMS to describe an air to air heat exchanger, which involves some coding in .idf file.

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Asked: 2016-05-04 07:31:26 -0500

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Last updated: May 04 '16