[Bldg-sim] DES Sys 3

[David Eldridge]

My first thought would be "no"...both multizone (MZS) and dual-duct (DDS)
are central AHU systems that combine air flows for temperature control, I
believe the intention of the System 3 tier of comparable AHUs is to have
multiple single-zone AHUs in the baseline building.  Multizone or dual-duct
are more analogous to large central AHUs in System 7 or System 8 with many
individual thermostatic zones.



Probably the single-zone with reheat would be a better option?
Constant-volume reheat would also be analogous if there was only one zone.
It seems like the intention is to change PSZ as the original basis, into a
single-zone system served from heating and cooling plants.



David



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*David S. Eldridge, Jr.**, P**.**E**.**, LEED AP BD+C, BEMP, HBDP*

Project Manager



Direct: (847) 316-9224 | Fax: (847) 328-4550

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Energy Efficiency Consultants and Sustainable Design Engineers

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> -----Original Message-----

> From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-

> bounces at lists.onebuilding.org] On Behalf Of Arpan Bakshi

> Sent: Monday, December 13, 2010 6:13 PM

> To: bldg-sim at lists.onebuilding.org

> Subject: [Bldg-sim] DES Sys 3

>

> The new Usgbc DES guidelines call for a 4 pipe CV AHU. Any thoughts on

> whether type MZS or DDS most closely reflect the system in eQUEST?

>

>

>

> ----------------------------

> Arpan Bakshi

> YRG sustainability

> Direct 646.704.2880

>

> Sent from my iPhone
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