Re: [EnergyPlus_Support] How to model a building with both CAV and VAV systems in the same space

[shiv dhaka <shiv_dhaka@xxxxxxxxxxx>]

hello Rowan

 

design builder is main use to make model very simply my advice to u to simulate both wings with different sys like vav nad cav this is possible in e+ only.

 

thr is no use of edited file in design duilder, e+ gives very accurate results.

u can use diff system in e+ very simply.

 

...................................................

With Thanks & Regards

ShivRaj Dhaka

M.Tech (3rd Sem.)

Energy Engineering

Malaviya National Institute of Tech. Jaipur

Mob. #+91-98-285-78171

--- On Thu, 10/12/09, rowan.blakers <rblakers@xxxxxxxxx> wrote:

From: rowan.blakers <rblakers@xxxxxxxxx>
Subject: [EnergyPlus_Support] How to model a building with both CAV and VAV systems in the same space
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Date: Thursday, 10 December, 2009, 6:17 AM

 

Hi,

I am trying to model the HVAC system for a new building. The building has two wings, connected by a narrow corridor.
The north wing is served by a constant-volume system. The south wing is open office, primarily served by a VAV system with hot water terminal reheats, but with one zone served by a constant volume AHU.

Heating is supplied by a single boiler, and likewise cooling by a single chiller.

I am using DesignBuilder to do most of the data input, and plan to only edit the IDF files as a last resort. Once I hand-edit the files, it is impossible to take them back into DesignBuilder.

DesignBuilder lets me put in either a multizone VAV or CAV system, but not both into the same building.

Would it be a reasonable approach to model the entire system as a VAV system, and then set the minimum turndown for the North wing to 1.0 (ie. to mimic constant volume)? Is there another way around the DesignBuilder limitations?

Thanks,
Rowan

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