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I am using eQUEST to model a high-rise multi-unit residential building (in a cold climate). The mechanical system most likely for selection will include 2-pipe fan coils (with a supplementary electric coil) in the suites and a corridor make-up air unit. The in-suite fan coils under consideration have an outdoor air intake and an air-to-air heat exchanger to recover heat from the suite washroom exhaust. This is not how the FC fan coil system is set up in DOE 2.2 – and there is no provision for heat recovery at the fan-coil level. I am using the OA-FROM-SYS keyword which moves the entire ventilation load to the corridor make-up air system where heat recovery can be applied. Doing this appears to greatly improve the energy performance of the building. I am wondering if modeling the system in this was is over-stating performance of the heat recovery.
I am wondering if there is experience within the group to better model such a system. Any assistance would be greatly appreciated.
Kind regards,
Brian Fountain, P.Eng. Energy Engineer
GreenSim
(905)639-6014 -- voice (905)639-0443 -- fax bfountain@xxxxxxxxxx
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