[Hap-users] HAP ENERGY MODELING FOR LEED - Model Supply Air

[Aaron Smith]

Hi David,

I think you've pretty much got it there.  G3.1.3.12 requires supply
temperature reset by 5°F/2.8°C under minimum cooling load conditions.  In
you case, I would use "Supply Temperature" of 13°C and "Temp. Reset by
Greatest Zone Demand" with the "Max Supply Temperature" as 15.8°C.

Aaron

Aaron Smith, P.Eng
Principal, Mechanical Engineer
LEED® AP BD+C, BEMP, BEAP, CGD
M&R Engineering Ltd.

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Date: Sun, 3 Mar 2019 22:33:08 +0000
From: David Garc?a <dgandres at hotmail.com>
To: "hap-users at lists.onebuilding.org"
	<hap-users at lists.onebuilding.org>
Subject: [Hap-users] HAP ENERGY MODELING FOR LEED - Model Supply Air
	Temperature Reset?
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Hi everyone,

I am developing an Energy Model for LEED Certification following ASHRAE
Standard 90.1-2007 Appendix G. The building has 7 stories above grade, one
story below grade and it is a mix used, office (5 stories) and retail (3
stories). Baseline Building HVAC System is 8 type. I m unsure how to model
Supply Air Temperature Reset.

On the one hand, for the Design Supply rates I use 11?C of temperature drop
(24-11= 13?C). On the other hand, I use Temp. Reset by Greatest Zone Demand
adding 2.3?C to Supply Temperature (13?C). Can this work?

[cid:image001.jpg at 01D4D219.7421BB10]

Many thanks for your help.

Regards,

David Garc?a
MEP Senior Engineer. Energy Modeler.
Sustainability Consultant. Parksmart Advisor.
dgandres at hotmail.com<mailto:dgandres at hotmail.com>

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