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Fan energy with Zonehvac:IdealLoadsAirSystem in EnergyPlus

asked 2019-09-09 16:41:21 -0600

Tim
163 ●1 ●7

updated 2019-09-10 17:33:42 -0600

flag of United States of America

11801 ●200 ●9 https://www.nrel.gov/b...

Hi - is it possible model fan energy and the associated heat pick up with the zonehvac:IdealLoadsAirSystem?

For early design modeling purposes the IdealLoadsAirSystem is very nice as it is simple to set up and can model heat recovery and economizers. The only thing missing is a good way to approximate fan energy with the mechanical ventilation rates of the system.

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Do you really need to account for fan heating in early design modeling?

mdahlhausen ( 2019-09-10 19:38:26 -0600 )edit

Well - at least the fan energy would be important if one wants to talk about EUI and differences between mech vent with heat recovery etc. Certainly open to simpler suggestions.

Tim ( 2019-09-10 21:45:37 -0600 )edit

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answered 2019-09-09 21:14:37 -0600

flag of United States of America

11801 ●200 ●9 https://www.nrel.gov/b...

updated 2019-09-10 08:50:08 -0600

There might be an easier way, but you could do this via an EMS program. Add a sensor for the ideal system airflow rate, calculate the fan power, and then actuate an ElectricEquipment object's power. The ElectricEquipment object can model both fan energy and heat gain.

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Asked: 2019-09-09 16:41:21 -0600

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Last updated: Sep 10 '19

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