Re: [EnergyPlus_Support] Fan Coil Unit - Convert cooling power capacity to maximum cold water flow

["Jim Dirkes jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx>]

Nassim,

Chilled water coils in E+ are defined somewhat differently than DX and heating coils; capacity is a combination of several inputs.  You'll need to either read the reference documents or experiment with inputs to get the exact desired capacity.

I think water flow and air flow should be sufficient for you, however.

On Thu, Oct 13, 2016 at 3:43 AM, Nassim Jamali nassimji@xxxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

 

Thanks Jim for your reply,

I'm not intending to give the FCU the power  but more the cooling coil.

Would that be the same?

However, in the Fan data screen, I don't see anywhere the place to put a power but more a performance curve.

Do you know anything about it or a translation for a power to the DB parameters?

Thanks,

Regards,

Nassim Jamali
Building Performance Consultant

t +32 (0)2 468 11 58
f +32 (0)2 468 11 78  
noordkustlaan 10, 1702 groot-bijgaarden, belgium

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From: "Jim Dirkes jim@buildingperformanceteam.com [EnergyPlus_Support]" <EnergyPlus_Support@yahoogroups.com>
To: "EnergyPlus Support" <EnergyPlus_Support@yahoogroups.com>
Sent: Wednesday, 12 October, 2016 15:55:21
Subject: Re: [EnergyPlus_Support] Fan Coil Unit - Convert cooling power capacity to maximum cold water flow

 

Nassim,

You can edit the fan power by expanding the zone HVAC, then editing the fan object.

Fan sizing is also affected by the sizing temperatures in the HVAC Zone Data screen.

On Wed, Oct 12, 2016 at 8:40 AM, Nassim Jamali nassimji@xxxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@yahoogroups.com> wrote:

 

Hi all,

I have to size Fan coil units in my model with known cooling powers.

But on EnergyPlus/DesignBuilder, we can only specify maximum cold water flow.

I've checked the Engineering reference of EnergyPlus (pasge 289 - Fan Coil Unit Sizing Formula (1257)) and they give the formula linking the two entities. However, it is unclear what are the other different parameters involved, didn't find any nomenclature explaining them (quite annoying actually), especially the DeltaTloop,des.

Can someone help me with it?

Thanks in advance

Best Regards,

Regards,

Nassim Jamali
Building Performance Consultant

t +32 (0)2 468 11 58
f +32 (0)2 468 11 78  
noordkustlaan 10, 1702 groot-bijgaarden, belgium

--

James V Dirkes II, PE, BEMP, LEED AP
CEO/President
The Building Performance Team Inc.
1631 Acacia Dr, GR, Mi 49504

Direct: 616.450.8653
jim@buildingperformanceteam.com

Website l  LinkedIn | May 2016 ASHRAE Journal article on energy modeling

?an open mind is not an end in itself but rather is like an open mouth, designed to bite down on something solid and nourishing.

--

James V Dirkes II, PE, BEMP, LEED AP
CEO/President
The Building Performance Team Inc.
1631 Acacia Dr, GR, Mi 49504

Direct: 616.450.8653
jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx

Website l  LinkedIn | May 2016 ASHRAE Journal article on energy modeling

?an open mind is not an end in itself but rather is like an open mouth, designed to bite down on something solid and nourishing.

__._,_.___

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Posted by: Jim Dirkes <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx>

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