[Equest-users] LEED model - constant volume terminal units

[Ramana Koti]

Vikram,

Thanks for your response. Each AHU contains a mixture of CV and VAV
terminal units. I'm double checking the loads currently.

Ramana.

On Mon, Oct 29, 2012 at 3:16 PM, Sami, Vikram
<Vikram.Sami at perkinswill.com>wrote:

> **1.       **Sounds logical – although – why can’t you specify a reheat
> fan system instead of a VAV system – that’s probably the more appropriate
> system type. I’m assuming the constant volume systems are being fed by a
> separate AHU. ****
>
> **2.       **If your baseline is auto sizing less than your proposed
> design – I would question the volume of air being designed in. Either that
> or maybe there is a load designed that’s not being represented in the
> model? ****
>
> ** **
>
> * *
>
> *Vikram Sami*, LEED AP BD+C****
>
> Sustainable Design Analyst****
>
> 1315 Peachtree St. NE, Atlanta, GA 30309****
>
> t: 404-443-7462    f: 404.892.5823       e: vikram.sami at perkinswill.com
> www.perkinswill.com****
>
> *Perkins+Will.*  Ideas + buildings that honor the broader goals of society
> ****
>
> ** **
>
> ** **
>
> *From:* equest-users-bounces at lists.onebuilding.org [mailto:
> equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Ramana Koti
> *Sent:* Monday, October 29, 2012 1:46 PM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] LEED model - constant volume terminal units****
>
> ** **
>
> Dear All,****
>
> ** **
>
> For a university classroom/studio building I'm modeling for LEED EAp2/c1
> under the 2009 version:****
>
> ** **
>
> The proposed design has two AHUs connected to 23 VAV terminal units and 14
> Constant Volume terminal units, all with HW loop reheat from an electric
> boiler. The baseline system is System number 8 per Appendix G, VAV with PFP
> boxes, with eletric resistance reheat. The waterside of cooling is
> purchased chilled water in both cases.****
>
> ** **
>
> Question 1: In the proposed design, I'm approximating the constant volume
> terminal units via a minimum flow ratio setting of 1.0. Is this the best
> way to do it? ****
>
> ** **
>
> Question 2: What is the equivalent of this in the Baseline design per
> Appendix G? If I repeat the same method used in the proposed design, should
> I let the terminal Primary CFMs default to auto-sizing? The Baseline
> auto-sized CFMs are lower than what is being specified in the mechanical
> design for the proposed model, working to my disadvantage. ****
>
> ** **
>
> Thank you,****
>
> Ramana Koti.****
>
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