[Bldg-sim] 90.1-2010 ECB and PRM questions

Fri Jul 14 08:38:26 PDT 2017

Thank you Jim,
I agree with your assessment. If you include shading from adjacent buildings in the proposed, then it should also be included in the baseline. I don’t believe anyone would agree with having shading in one but not the other.

Christopher R. Jones, P.Eng.
Technical Specialist
Sustainability & Energy

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Please consider the environment before printing...

From: Jim Dirkes [mailto:jim at buildingperformanceteam.com]
Sent: Friday, July 14, 2017 11:09 AM
To: Jones, Christopher <Christopher.r.Jones at wsp.com>
Cc: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] 90.1-2010 ECB and PRM questions

Dear Chris,
I think the "letter of the law" does not require that you model shading from an adjacent building for you Baseline.

The "spirit of the law" doesn't seem to require it, either. A Baseline building is intended to be a minimum performance standard against which your building is compared. For the Proposed building, the owner was not compelled to select a site with shading from an adjacent building - it could have been in the middle of a corn field with no shading. As a result, it seems that you need not include the shading in the Baseline.

It might, however, be beneficial or detrimental to include the shading in the Baseline, and it seems acceptable to do either within the standard's requirements. I'm imagining a situation where the shading blocks winter sun and is a net detriment to energy use. If I wanted a rigorous comparison, I'd make the Baseline model in the manner that gave the lowest Baseline energy use. If I wanted the most savings :), I'd include the adjacent building in the Baseline so as not to be penalized.

I agree that the Baseline model must include mandatory requirements for daylighting.

On Thu, Jul 13, 2017 at 8:07 AM, Jones, Christopher via Bldg-sim <bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>> wrote:
Hello Sim Folks,
I have two questions regarding 90.1-2010 ECB and PRM. Our building code references ECB and LEED references App. G PRM.

Shading due to adjacent buildings – should this shading be modeled for:
ECB –
PRM –

90.1-2010 ECB doesn’t directly refer to shading by other buildings.
App. G as detailed in the PNNL PRM Manual states that external shading from other buildings or other objects can be modeled for 90.1-2010 PRM.

Therefore, I believe one can choose to model that shading or one can ignore it.

Daylighting controls – should daylighting controls be modeled for:
ECB –
PRM –

Re. Daylighting:
Reviewing Section 11.1.4 Compliance with Section 11 will be achieved if:

a.       All requirements of Sections 5.4, 6.4, 7.4, 8.4, 9.4, and 10.4 are met;

Table 11.3.1, 6. Lighting, Baseline: Lighting controls shall be the minimum required.

These clauses lead me to believe that daylighting controls should be modeled in the baseline using the correct side-lighted and top-lighted area calculations.

App. G as detailed in the PNNL PRM Manual is clear – daylighting controls are to be modeled in the baseline.

Any and all thoughts appreciated.

Christopher R. Jones, P.Eng.
Technical Specialist
Sustainability & Energy

[cid:image001.png at 01D2FC95.B3C31940]
T +1 416-644-0252<tel:(416)%20644-0252>

2300 Yonge Street, Suite 2300
Toronto, ON M4P 1E4 Canada
wsp.com<http://wsp.com>

Please consider the environment before printing...

From: Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org<mailto:bldg-sim-bounces at lists.onebuilding.org>] On Behalf Of Sprout Info_Mail via Bldg-sim
Sent: Thursday, June 29, 2017 10:38 PM
To: Mayank Bhatnagar <mayank.23aug at gmail.com<mailto:mayank.23aug at gmail.com>>
Cc: bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>
Subject: Re: [Bldg-sim] Building Energy Simulation: A Workbook Using DesignBuilder

Ohh wow Mayank.

This is really great. Thanks for sharing.
Does anybody have any more such resources.Please share.

Regards,
Namrata Dhamankar

On 29 Jun 2017 20:01, "Mayank Bhatnagar via Bldg-sim" <bldg-sim at lists.onebuilding.org<mailto:bldg-sim at lists.onebuilding.org>> wrote:
Hello everyone,

I have been searching for some books on basics of building physics, and energy simulation and found a very nice resource to understand the building physics along with energy simulation.

Hope this will help to new members in the field of energy modelling and simulation. The book is available at:

https://www.amazon.com/Building-Energy-Simulation-Workbook-DesignBuilderTM/dp/1498744516/ref=sr_1_1?ie=UTF8&qid=1498012115&sr=8-1&keywords=energy+simulation

https://www.crcpress.com/Building-Energy-Simulation-A-Workbook-Using-DesignBuilder/Garg-Mathur-Tetali-Bhatia/p/book/9781498744515

Regards,

Mayank Bhatnagar

Sr. Energy Analyst | Research Scholar

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