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RE: [EnergyPlus_Support] sizing factor
Hi Mike,
Thanks for the work around. Could you also say what is the
difference/relationship between the zone sizing factor under ZONE SIZING
and the zone air supply factor under COMPACT HVAC:ZONE:VAV?
Minu Agarwal
CoSA, Buro Happold Consulting Engineers PC
100 Broadway
New York, NY 10005
USA
Telephone: +1 212 334 2025
Fax: +1 212 334 5528
________________________________
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Michael J.
Witte
Sent: Friday, April 11, 2008 1:46 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] sizing factor
My apologies for the slow response.
EnergyPlus does not currently have separate sizing factors for heating
and
cooling. The EnergyPlus sizing factor is applied to the supply air
volume flow
rate determined for a given zone. This adjusted flow rate is then used
to
compute coil sizes for heating and cooling coils based on the
user-specified
supply air temperatures in the SYSTEM SIZING object.
By specifying different supply air temperatures in the zone sizing
object and
the system sizing object, you can force individual coils to be sized
larger or
smaller. But this is a trial and error approach unless you know the
design
mixed air temperature and can compute the required supply air
temperature to
get the desired sizing factor.
Mike
On 19 Mar 2008 at 14:52, Minu Agarwal wrote:
> Dear All,
>
>
>
> Is it possible to specify different sizing factors for heating and
> cooling design? Could somebody tell me how it could be done? The I/O
> file mentions that sizing factor can be specified at the building
level
> or the zone level but the same factor is applied to heating and
cooling
> sizing run.
>
>
>
>
>
> Thank You,
>
> Minu
>
> CoSA, Buro Happold Consulting Engineers PC
> 100 Broadway
> New York, NY 10005
> USA
> Telephone: +1 212 334 2025
> Fax: +1 212 334 5528
>
>
>
>
>
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