[Bldg-sim] How to Model Parkade CO2 Levels for Exhaust Requirements

[Quitadamo, Bob]

Hi Donal,

 

You'll want to control outside air off CO (not CO2) in a parking garage and be sure the controls sequence utilize the correct ppm setpoints.  Generally there is a minimum ventilation/exhaust rate to maintain even when CO levels are in check for code compliance. 

 

For modeling the system, a specific ventilation schedule correlating to expected usage of the car garage has worked for me in the past.  I would imagine similar schedules for this facility have been created for occupancy and lighting/plug loads.

 

Regards,

 

Bob Quitadamo

 

 

From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Dónal O'Connor
Sent: Tuesday, November 27, 2012 9:55 AM
To: Building Sim Forum
Subject: [Bldg-sim] How to Model Parkade CO2 Levels for Exhaust Requirements

 

Dear building-sim,

I'm currently working on a LEED NC sports facility with an underground parkade for approximately 200 cars.

The parkade exhaust system (100% OA) turns on if the CO2 levels detected in the parkade exceed a particular threshold. Has anybody modeled such a system? What assumptions can be made for the CO2 profile? As it is in a northern climate, I do not want to overestimate the usage of the system which would skew the heating energy required to heat the OA to the required supply temperature.

Your help is greatly appreciated.

Thanks

Donal

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