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Modelling two VRF outdoor units for single zone

asked 2015-06-24 11:21:12 -0500

flag of United Kingdom of Great Britain and Northern Ireland

2522 ●4 ●18

updated 2015-07-25 10:12:50 -0500

flag of United States of America

10077 ●18 ●25 https://www.nrel.gov/b...

I am currently modeling a VRF system that serves one thermal zone. The brief document that I have states that the zone is served by two outdoor VRF units. I was wondering is there a way to model this? Do i have to add up their cooling/heating capacities and input power or there is some other way around it?

Also, it does mention that the zone also has two indoor units. This could also means that each outdoor unit is connected to each indoor unit. Is it common practice to have two VRFs serving one zone?

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answered 2015-06-30 09:56:13 -0500

kwalkerman
1442 ●5 ●9

Is it a large zone? Often two small units are used in larger zones. You can have more than one ZoneHVAC equipment in each zone. I've never used two of the same type, but I don't see why you couldn't. Also, you can connect more than one indoor unit to one outdoor unit using the ZoneTerminalUnitList.

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Multiple ZoneHVAC equipment of the same type can be included in the ZoneHVAC:EquipmentList where equipment sequencing is specified.

MatthewSteen ( 2015-07-25 10:11:46 -0500 )edit

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Asked: 2015-06-24 11:21:12 -0500

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Last updated: Jun 30 '15

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