[Equest-users] Baseline zoning

[Nick Caton]

I sense 2 questions are being asked simultaneously, but only 1 has been answered…


·         Baseline zoning should match the proposed design

·         Baseline VAV/FPVAV systems should have one terminal unit per zone (matching proposed).  All baseline VAV/FPVAV terminals on a given floor are served by a single central air handling unit, in your case with chilled water coils served by 1 or more baseline chillers.   These elements together make up the “system per floor.”  In this way, you get one set of baseline supply/return fans to calculate per floor.

·         Put another way: Baseline VAV systems are not intended to be modeled as a series of single zone systems, but rather as one air handling unit per floor serving one terminal unit per zone.

I might suggest considering the baseline FPVAV boxes as analogous to a VRV system’s cassettes: each cover the same area (zone) and use the same thermostat, but each is merely one component of a larger system.

Hope this helps,

~Nick

[cid:489575314 at 22072009-0ABB]

NICK CATON, P.E.
SENIOR ENGINEER

Smith & Boucher Engineers
25501 west valley parkway, suite 200
olathe, ks 66061
direct 913.344.0036
fax 913.345.0617
www.smithboucher.com

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Utku Simitli
Sent: Thursday, May 30, 2013 9:03 AM
To: 'Sambhav Tiwari'; 'equest-users'
Subject: Re: [Equest-users] Baseline zoning

Hi Sambhav,

I think your baseline system corresponds to system 8, so as you can see from ASHRAE 90.1-2007 G3.1.1, you should consider your baseline system as system per floor.

Regards,

Utku Simitli
reengen<http://www.reengen.com/>
Building Energy Analyst
MSc. Mechanical Engineer

Reengen Enerji Ltd. Şti.
Resitpasa mh. İstinyeboyu cd.ITU Lojmanları
Vadi Blokları A2 Blok No:14
Istanbul/Turkey
m: +90 530 469 48 69
e: utku.simitli at reengen.com<mailto:utku.simitli at reengen.com>


From: equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org> [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Sambhav Tiwari
Sent: Thursday, May 30, 2013 12:33 PM
To: equest-users
Subject: [Equest-users] Baseline zoning

Hi All,
          I have VRV system which i will model as PVVVT system per zone in proposed case. my baseline is chiller with PFP VAV  should  i model my basline VAV system as system per zone like in proposed case VRV or i should consider it as system per floor.


Regards
Sambhav
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